Commit Graph

58894 Commits

Author SHA1 Message Date
Sriram Rajagopalan 592acbf168 ext4: zero out the unused memory region in the extent tree block
This commit zeroes out the unused memory region in the buffer_head
corresponding to the extent metablock after writing the extent header
and the corresponding extent node entries.

This is done to prevent random uninitialized data from getting into
the filesystem when the extent block is synced.

This fixes CVE-2019-11833.

Signed-off-by: Sriram Rajagopalan <sriramr@arista.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
2019-05-10 19:28:06 -04:00
Linus Torvalds 8ea5b2abd0 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs mount fix from Al Viro:
 "Fix for umount -l/mount --move race caught by syzbot yesterday..."

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  do_move_mount(): fix an unsafe use of is_anon_ns()
2019-05-09 19:35:41 -07:00
Linus Torvalds 06cbd26d31 NFS client updates for Linux 5.2
Stable bugfixes:
 - Fall back to MDS if no deviceid is found rather than aborting   # v4.11+
 - NFS4: Fix v4.0 client state corruption when mount
 
 Features:
 - Much improved handling of soft mounts with NFS v4.0
   - Reduce risk of false positive timeouts
   - Faster failover of reads and writes after a timeout
   - Added a "softerr" mount option to return ETIMEDOUT instead of
     EIO to the application after a timeout
 - Increase number of xprtrdma backchannel requests
 - Add additional xprtrdma tracepoints
 - Improved send completion batching for xprtrdma
 
 Other bugfixes and cleanups:
 - Return -EINVAL when NFS v4.2 is passed an invalid dedup mode
 - Reduce usage of GFP_ATOMIC pages in SUNRPC
 - Various minor NFS over RDMA cleanups and bugfixes
 - Use the correct container namespace for upcalls
 - Don't share superblocks between user namespaces
 - Various other container fixes
 - Make nfs_match_client() killable to prevent soft lockups
 - Don't mark all open state for recovery when handling recallable state revoked flag
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Merge tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client updates from Anna Schumaker:
 "Highlights include:

  Stable bugfixes:
   - Fall back to MDS if no deviceid is found rather than aborting   # v4.11+
   - NFS4: Fix v4.0 client state corruption when mount

  Features:
   - Much improved handling of soft mounts with NFS v4.0:
       - Reduce risk of false positive timeouts
       - Faster failover of reads and writes after a timeout
       - Added a "softerr" mount option to return ETIMEDOUT instead of
         EIO to the application after a timeout
   - Increase number of xprtrdma backchannel requests
   - Add additional xprtrdma tracepoints
   - Improved send completion batching for xprtrdma

  Other bugfixes and cleanups:
   - Return -EINVAL when NFS v4.2 is passed an invalid dedup mode
   - Reduce usage of GFP_ATOMIC pages in SUNRPC
   - Various minor NFS over RDMA cleanups and bugfixes
   - Use the correct container namespace for upcalls
   - Don't share superblocks between user namespaces
   - Various other container fixes
   - Make nfs_match_client() killable to prevent soft lockups
   - Don't mark all open state for recovery when handling recallable
     state revoked flag"

* tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (69 commits)
  SUNRPC: Rebalance a kref in auth_gss.c
  NFS: Fix a double unlock from nfs_match,get_client
  nfs: pass the correct prototype to read_cache_page
  NFSv4: don't mark all open state for recovery when handling recallable state revoked flag
  SUNRPC: Fix an error code in gss_alloc_msg()
  SUNRPC: task should be exit if encode return EKEYEXPIRED more times
  NFS4: Fix v4.0 client state corruption when mount
  PNFS fallback to MDS if no deviceid found
  NFS: make nfs_match_client killable
  lockd: Store the lockd client credential in struct nlm_host
  NFS: When mounting, don't share filesystems between different user namespaces
  NFS: Convert NFSv2 to use the container user namespace
  NFSv4: Convert the NFS client idmapper to use the container user namespace
  NFS: Convert NFSv3 to use the container user namespace
  SUNRPC: Use namespace of listening daemon in the client AUTH_GSS upcall
  SUNRPC: Use the client user namespace when encoding creds
  NFS: Store the credential of the mount process in the nfs_server
  SUNRPC: Cache cred of process creating the rpc_client
  xprtrdma: Remove stale comment
  xprtrdma: Update comments that reference ib_drain_qp
  ...
2019-05-09 14:33:15 -07:00
Benjamin Coddington c260121a97 NFS: Fix a double unlock from nfs_match,get_client
Now that nfs_match_client drops the nfs_client_lock, we should be
careful
to always return it in the same condition: locked.

Fixes: 950a578c61 ("NFS: make nfs_match_client killable")
Reported-by: syzbot+228a82b263b5da91883d@syzkaller.appspotmail.com
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-05-09 16:26:57 -04:00
Christoph Hellwig a46126ccc7 nfs: pass the correct prototype to read_cache_page
Fix the callbacks NFS passes to read_cache_page to actually have the
proper type expected.  Casting around function pointers can easily
hide typing bugs, and defeats control flow protection.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-05-09 16:26:57 -04:00
Scott Mayhew 8ca017c8ce NFSv4: don't mark all open state for recovery when handling recallable state revoked flag
Only delegations and layouts can be recalled, so it shouldn't be
necessary to recover all opens when handling the status bit
SEQ4_STATUS_RECALLABLE_STATE_REVOKED.  We'll still wind up calling
nfs41_open_expired() when a TEST_STATEID returns NFS4ERR_DELEG_REVOKED.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-05-09 16:26:57 -04:00
ZhangXiaoxu f02f3755db NFS4: Fix v4.0 client state corruption when mount
stat command with soft mount never return after server is stopped.

When alloc a new client, the state of the client will be set to
NFS4CLNT_LEASE_EXPIRED.

When the server is stopped, the state manager will work, and accord
the state to recover. But the state is NFS4CLNT_LEASE_EXPIRED, it
will drain the slot table and lead other task to wait queue, until
the client recovered. Then the stat command is hung.

When discover server trunking, the client will renew the lease,
but check the client state, it lead the client state corruption.

So, we need to call state manager to recover it when detect server
ip trunking.

Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-05-09 16:26:05 -04:00
Olga Kornievskaia b1029c9bc0 PNFS fallback to MDS if no deviceid found
If we fail to find a good deviceid while trying to pnfs instead of
propogating an error back fallback to doing IO to the MDS. Currently,
code with fals the IO with EINVAL.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Fixes: 8d40b0f148 ("NFS filelayout:call GETDEVICEINFO after pnfs_layout_process completes"
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-05-09 16:24:56 -04:00
Steve French d1c35afb08 smb3: trivial cleanup to smb2ops.c
Minor cleanup - e.g. missing \n at end of debug statement.

Reported-by: Christoph Probst <kernel@probst.it>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-05-09 13:17:30 -05:00
Christoph Probst a205d5005e cifs: cleanup smb2ops.c and normalize strings
Fix checkpatch warnings/errors in smb2ops.c except "LONG_LINE". Add missing
linebreaks, indentings, __func__. Remove void-returns, unneeded braces.
Address warnings spotted by checkpatch.

Add SPDX License Header.

Add missing "\n" and capitalize first letter in some cifs_dbg() strings.

Signed-off-by: Christoph Probst <kernel@probst.it>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-05-09 13:17:04 -05:00
Steve French b63a9de02d smb3: display session id in debug data
Displaying the session id in /proc/fs/cifs/DebugData
is needed in order to correlate Linux client information
with network and server traces for many common support
scenarios.  Turned out to be very important for debugging.

Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-05-09 13:15:39 -05:00
Randall Huang 2777e65437 f2fs: fix to avoid accessing xattr across the boundary
When we traverse xattr entries via __find_xattr(),
if the raw filesystem content is faked or any hardware failure occurs,
out-of-bound error can be detected by KASAN.
Fix the issue by introducing boundary check.

[   38.402878] c7   1827 BUG: KASAN: slab-out-of-bounds in f2fs_getxattr+0x518/0x68c
[   38.402891] c7   1827 Read of size 4 at addr ffffffc0b6fb35dc by task
[   38.402935] c7   1827 Call trace:
[   38.402952] c7   1827 [<ffffff900809003c>] dump_backtrace+0x0/0x6bc
[   38.402966] c7   1827 [<ffffff9008090030>] show_stack+0x20/0x2c
[   38.402981] c7   1827 [<ffffff900871ab10>] dump_stack+0xfc/0x140
[   38.402995] c7   1827 [<ffffff9008325c40>] print_address_description+0x80/0x2d8
[   38.403009] c7   1827 [<ffffff900832629c>] kasan_report_error+0x198/0x1fc
[   38.403022] c7   1827 [<ffffff9008326104>] kasan_report_error+0x0/0x1fc
[   38.403037] c7   1827 [<ffffff9008325000>] __asan_load4+0x1b0/0x1b8
[   38.403051] c7   1827 [<ffffff90085fcc44>] f2fs_getxattr+0x518/0x68c
[   38.403066] c7   1827 [<ffffff90085fc508>] f2fs_xattr_generic_get+0xb0/0xd0
[   38.403080] c7   1827 [<ffffff9008395708>] __vfs_getxattr+0x1f4/0x1fc
[   38.403096] c7   1827 [<ffffff9008621bd0>] inode_doinit_with_dentry+0x360/0x938
[   38.403109] c7   1827 [<ffffff900862d6cc>] selinux_d_instantiate+0x2c/0x38
[   38.403123] c7   1827 [<ffffff900861b018>] security_d_instantiate+0x68/0x98
[   38.403136] c7   1827 [<ffffff9008377db8>] d_splice_alias+0x58/0x348
[   38.403149] c7   1827 [<ffffff900858d16c>] f2fs_lookup+0x608/0x774
[   38.403163] c7   1827 [<ffffff900835eacc>] lookup_slow+0x1e0/0x2cc
[   38.403177] c7   1827 [<ffffff9008367fe0>] walk_component+0x160/0x520
[   38.403190] c7   1827 [<ffffff9008369ef4>] path_lookupat+0x110/0x2b4
[   38.403203] c7   1827 [<ffffff900835dd38>] filename_lookup+0x1d8/0x3a8
[   38.403216] c7   1827 [<ffffff900835eeb0>] user_path_at_empty+0x54/0x68
[   38.403229] c7   1827 [<ffffff9008395f44>] SyS_getxattr+0xb4/0x18c
[   38.403241] c7   1827 [<ffffff9008084200>] el0_svc_naked+0x34/0x38

Signed-off-by: Randall Huang <huangrandall@google.com>
[Jaegeuk Kim: Fix wrong ending boundary]
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-09 09:43:29 -07:00
Linus Torvalds 8823880561 Orangefs: This pull request includes one fix and our "Orangefs through
the pagecache" patch series which greatly improves our small IO
 performance and helps us pass more xfstests than before.
 
 fix: orangefs: truncate before updating size
 
 Pagecache series: all the rest
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Merge tag 'for-linus-5.2-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
 "This includes one fix and our "Orangefs through the pagecache" patch
  series which greatly improves our small IO performance and helps us
  pass more xfstests than before.

  Fix:
   - orangefs: truncate before updating size

  Pagecache series:
   - all the rest"

* tag 'for-linus-5.2-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux: (23 commits)
  orangefs: truncate before updating size
  orangefs: copy Orangefs-sized blocks into the pagecache if possible.
  orangefs: pass slot index back to readpage.
  orangefs: remember count when reading.
  orangefs: add orangefs_revalidate_mapping
  orangefs: implement writepages
  orangefs: write range tracking
  orangefs: avoid fsync service operation on flush
  orangefs: skip inode writeout if nothing to write
  orangefs: move do_readv_writev to direct_IO
  orangefs: do not return successful read when the client-core disappeared
  orangefs: implement writepage
  orangefs: migrate to generic_file_read_iter
  orangefs: service ops done for writeback are not killable
  orangefs: remove orangefs_readpages
  orangefs: reorganize setattr functions to track attribute changes
  orangefs: let setattr write to cached inode
  orangefs: set up and use backing_dev_info
  orangefs: hold i_lock during inode_getattr
  orangefs: update attributes rather than relying on server
  ...
2019-05-09 09:37:25 -07:00
Amir Goldstein 4d8e7055a4 fsnotify: fix unlink performance regression
__fsnotify_parent() has an optimization in place to avoid unneeded
take_dentry_name_snapshot().  When fsnotify_nameremove() was changed
not to call __fsnotify_parent(), we left out the optimization.
Kernel test robot reported a 5% performance regression in concurrent
unlink() workload.

Reported-by: kernel test robot <rong.a.chen@intel.com>
Link: https://lore.kernel.org/lkml/20190505062153.GG29809@shao2-debian/
Link: https://lore.kernel.org/linux-fsdevel/20190104090357.GD22409@quack2.suse.cz/
Fixes: 5f02a87763 ("fsnotify: annotate directory entry modification events")
CC: stable@vger.kernel.org
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2019-05-09 12:44:00 +02:00
Filipe Manana 72bd2323ec Btrfs: do not abort transaction at btrfs_update_root() after failure to COW path
Currently when we fail to COW a path at btrfs_update_root() we end up
always aborting the transaction. However all the current callers of
btrfs_update_root() are able to deal with errors returned from it, many do
end up aborting the transaction themselves (directly or not, such as the
transaction commit path), other BUG_ON() or just gracefully cancel whatever
they were doing.

When syncing the fsync log, we call btrfs_update_root() through
tree-log.c:update_log_root(), and if it returns an -ENOSPC error, the log
sync code does not abort the transaction, instead it gracefully handles
the error and returns -EAGAIN to the fsync handler, so that it falls back
to a transaction commit. Any other error different from -ENOSPC, makes the
log sync code abort the transaction.

So remove the transaction abort from btrfs_update_log() when we fail to
COW a path to update the root item, so that if an -ENOSPC failure happens
we avoid aborting the current transaction and have a chance of the fsync
succeeding after falling back to a transaction commit.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203413
Fixes: 79787eaab4 ("btrfs: replace many BUG_ONs with proper error handling")
Cc: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-09 11:25:27 +02:00
Josef Bacik d7400ee1b4 btrfs: use the existing reserved items for our first prop for inheritance
We're now reserving an extra items worth of space for property
inheritance.  We only have one property at the moment so this covers us,
but if we add more in the future this will allow us to not get bitten by
the extra space reservation.  If we do add more properties in the future
we should re-visit how we calculate the space reservation needs by the
callers.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ refreshed on top of prop/xattr cleanups ]
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-09 11:18:14 +02:00
Al Viro 05883eee85 do_move_mount(): fix an unsafe use of is_anon_ns()
What triggers it is a race between mount --move and umount -l
of the source; we should reject it (the source is parentless *and*
not the root of anon namespace at that), but the check for namespace
being an anon one is broken in that case - is_anon_ns() needs
ns to be non-NULL.  Better fixed here than in is_anon_ns(), since
the rest of the callers is guaranteed to get a non-NULL argument...

Reported-by: syzbot+494c7ddf66acac0ad747@syzkaller.appspotmail.com
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-09 02:32:50 -04:00
Chao Yu c9c8ed50d9 f2fs: fix to avoid potential race on sbi->unusable_block_count access/update
Use sbi.stat_lock to protect sbi->unusable_block_count accesss/udpate, in
order to avoid potential race on it.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:13 -07:00
Chao Yu d764834378 f2fs: add tracepoint for f2fs_filemap_fault()
This patch adds tracepoint for f2fs_filemap_fault().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:13 -07:00
Chao Yu 93770ab7a6 f2fs: introduce DATA_GENERIC_ENHANCE
Previously, f2fs_is_valid_blkaddr(, blkaddr, DATA_GENERIC) will check
whether @blkaddr locates in main area or not.

That check is weak, since the block address in range of main area can
point to the address which is not valid in segment info table, and we
can not detect such condition, we may suffer worse corruption as system
continues running.

So this patch introduce DATA_GENERIC_ENHANCE to enhance the sanity check
which trigger SIT bitmap check rather than only range check.

This patch did below changes as wel:
- set SBI_NEED_FSCK in f2fs_is_valid_blkaddr().
- get rid of is_valid_data_blkaddr() to avoid panic if blkaddr is invalid.
- introduce verify_fio_blkaddr() to wrap fio {new,old}_blkaddr validation check.
- spread blkaddr check in:
 * f2fs_get_node_info()
 * __read_out_blkaddrs()
 * f2fs_submit_page_read()
 * ra_data_block()
 * do_recover_data()

This patch can fix bug reported from bugzilla below:

https://bugzilla.kernel.org/show_bug.cgi?id=203215
https://bugzilla.kernel.org/show_bug.cgi?id=203223
https://bugzilla.kernel.org/show_bug.cgi?id=203231
https://bugzilla.kernel.org/show_bug.cgi?id=203235
https://bugzilla.kernel.org/show_bug.cgi?id=203241

= Update by Jaegeuk Kim =

DATA_GENERIC_ENHANCE enhanced to validate block addresses on read/write paths.
But, xfstest/generic/446 compalins some generated kernel messages saying invalid
bitmap was detected when reading a block. The reaons is, when we get the
block addresses from extent_cache, there is no lock to synchronize it from
truncating the blocks in parallel.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:13 -07:00
Chao Yu 896285ad02 f2fs: fix to handle error in f2fs_disable_checkpoint()
In f2fs_disable_checkpoint(), it needs to detect and propagate error
number returned from f2fs_write_checkpoint().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:13 -07:00
Chengguang Xu d5d5f0c0c9 f2fs: remove redundant check in f2fs_file_write_iter()
We have already checked flag IOCB_DIRECT in the sanity
check of flag IOCB_NOWAIT, so don't have to check it
again here.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:12 -07:00
Chao Yu f5a131bb23 f2fs: fix to be aware of readonly device in write_checkpoint()
As Park Ju Hyung reported:

Probably unrelated but a similar issue:
Warning appears upon unmounting a corrupted R/O f2fs loop image.

Should be a trivial issue to fix as well :)

[ 2373.758424] ------------[ cut here ]------------
[ 2373.758428] generic_make_request: Trying to write to read-only
block-device loop1 (partno 0)
[ 2373.758455] WARNING: CPU: 1 PID: 13950 at block/blk-core.c:2174
generic_make_request_checks+0x590/0x630
[ 2373.758556] CPU: 1 PID: 13950 Comm: umount Tainted: G           O
   4.19.35-zen+ #1
[ 2373.758558] Hardware name: System manufacturer System Product
Name/ROG MAXIMUS X HERO (WI-FI AC), BIOS 1704 09/14/2018
[ 2373.758564] RIP: 0010:generic_make_request_checks+0x590/0x630
[ 2373.758567] Code: 5c 03 00 00 48 8d 74 24 08 48 89 df c6 05 b5 cd
36 01 01 e8 c2 90 01 00 48 89 c6 44 89 ea 48 c7 c7 98 64 59 82 e8 d5
9b a7 ff <0f> 0b 48 8b 7b 08 e9 f2 fa ff ff 41 8b 86 98 02 00 00 49 8b
16 89
[ 2373.758570] RSP: 0018:ffff8882bdb43950 EFLAGS: 00010282
[ 2373.758573] RAX: 0000000000000050 RBX: ffff8887244c6700 RCX: 0000000000000006
[ 2373.758575] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff88884ec56340
[ 2373.758577] RBP: ffff888849c426c0 R08: 0000000000000004 R09: 00000000000003ba
[ 2373.758579] R10: 0000000000000001 R11: 0000000000000029 R12: 0000000000001000
[ 2373.758581] R13: 0000000000000000 R14: ffff888844a2e800 R15: ffff8882bdb43ac0
[ 2373.758584] FS:  00007fc0d114f8c0(0000) GS:ffff88884ec40000(0000)
knlGS:0000000000000000
[ 2373.758586] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2373.758588] CR2: 00007fc0d1ad12c0 CR3: 00000002bdb82003 CR4: 00000000003606e0
[ 2373.758590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2373.758592] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 2373.758593] Call Trace:
[ 2373.758602]  ? generic_make_request+0x46/0x3d0
[ 2373.758608]  ? wait_woken+0x80/0x80
[ 2373.758612]  ? mempool_alloc+0xb7/0x1a0
[ 2373.758618]  ? submit_bio+0x30/0x110
[ 2373.758622]  ? bvec_alloc+0x7c/0xd0
[ 2373.758628]  ? __submit_merged_bio+0x68/0x390
[ 2373.758633]  ? f2fs_submit_page_write+0x1bb/0x7f0
[ 2373.758638]  ? f2fs_do_write_meta_page+0x7f/0x160
[ 2373.758642]  ? __f2fs_write_meta_page+0x70/0x140
[ 2373.758647]  ? f2fs_sync_meta_pages+0x140/0x250
[ 2373.758653]  ? f2fs_write_checkpoint+0x5c5/0x17b0
[ 2373.758657]  ? f2fs_sync_fs+0x9c/0x110
[ 2373.758664]  ? sync_filesystem+0x66/0x80
[ 2373.758667]  ? generic_shutdown_super+0x1d/0x100
[ 2373.758670]  ? kill_block_super+0x1c/0x40
[ 2373.758674]  ? kill_f2fs_super+0x64/0xb0
[ 2373.758678]  ? deactivate_locked_super+0x2d/0xb0
[ 2373.758682]  ? cleanup_mnt+0x65/0xa0
[ 2373.758688]  ? task_work_run+0x7f/0xa0
[ 2373.758693]  ? exit_to_usermode_loop+0x9c/0xa0
[ 2373.758698]  ? do_syscall_64+0xc7/0xf0
[ 2373.758703]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 2373.758706] ---[ end trace 5d3639907c56271b ]---
[ 2373.758780] print_req_error: I/O error, dev loop1, sector 143048
[ 2373.758800] print_req_error: I/O error, dev loop1, sector 152200
[ 2373.758808] print_req_error: I/O error, dev loop1, sector 8192
[ 2373.758819] print_req_error: I/O error, dev loop1, sector 12272

This patch adds to detect readonly device in write_checkpoint() to avoid
trigger write IOs on it.

Reported-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:12 -07:00
Chao Yu b61af314c9 f2fs: fix to skip recovery on readonly device
As Park Ju Hyung reported in mailing list:

https://sourceforge.net/p/linux-f2fs/mailman/message/36639787/

generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 0 PID: 23437 at block/blk-core.c:2174 generic_make_request_checks+0x594/0x630

 generic_make_request+0x46/0x3d0
 submit_bio+0x30/0x110
 __submit_merged_bio+0x68/0x390
 f2fs_submit_page_write+0x1bb/0x7f0
 f2fs_do_write_meta_page+0x7f/0x160
 __f2fs_write_meta_page+0x70/0x140
 f2fs_sync_meta_pages+0x140/0x250
 f2fs_write_checkpoint+0x5c5/0x17b0
 f2fs_sync_fs+0x9c/0x110
 sync_filesystem+0x66/0x80
 f2fs_recover_fsync_data+0x790/0xa30
 f2fs_fill_super+0xe4e/0x1980
 mount_bdev+0x518/0x610
 mount_fs+0x34/0x13f
 vfs_kern_mount.part.11+0x4f/0x120
 do_mount+0x2d1/0xe40
 __x64_sys_mount+0xbf/0xe0
 do_syscall_64+0x4a/0xf0
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

print_req_error: I/O error, dev loop0, sector 4096

If block device is readonly, we should never trigger write IO from
filesystem layer, but previously, orphan and journal recovery didn't
consider such condition, result in triggering above warning, fix it.

Reported-by: Park Ju Hyung <qkrwngud825@gmail.com>
Tested-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:12 -07:00
Chao Yu f824deb54b f2fs: fix to consider multiple device for readonly check
This patch introduce f2fs_hw_is_readonly() to check whether lower
device is readonly or not, it adapts multiple device scenario.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:12 -07:00
Chao Yu b471eb99e6 f2fs: relocate chksum_offset for large_nat_bitmap feature
For large_nat_bitmap feature, there is a design flaw:

Previous:

struct f2fs_checkpoint layout:
+--------------------------+  0x0000
| checkpoint_ver           |
| ......                   |
| checksum_offset          |------+
| ......                   |      |
| sit_nat_version_bitmap[] |<-----|-------+
| ......                   |      |       |
| checksum_value           |<-----+       |
+--------------------------+  0x1000      |
|                          |      nat_bitmap + sit_bitmap
| payload blocks           |              |
|                          |              |
+--------------------------|<-------------+

Obviously, if nat_bitmap size + sit_bitmap size is larger than
MAX_BITMAP_SIZE_IN_CKPT, nat_bitmap or sit_bitmap may overlap
checkpoint checksum's position, once checkpoint() is triggered
from kernel, nat or sit bitmap will be damaged by checksum field.

In order to fix this, let's relocate checksum_value's position
to the head of sit_nat_version_bitmap as below, then nat/sit
bitmap and chksum value update will become safe.

After:

struct f2fs_checkpoint layout:
+--------------------------+  0x0000
| checkpoint_ver           |
| ......                   |
| checksum_offset          |------+
| ......                   |      |
| sit_nat_version_bitmap[] |<-----+
| ......                   |<-------------+
|                          |              |
+--------------------------+  0x1000      |
|                          |      nat_bitmap + sit_bitmap
| payload blocks           |              |
|                          |              |
+--------------------------|<-------------+

Related report and discussion:

https://sourceforge.net/p/linux-f2fs/mailman/message/36642346/

Reported-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:11 -07:00
Chao Yu d7eb8f1cdf f2fs: allow unfixed f2fs_checkpoint.checksum_offset
Previously, f2fs_checkpoint.checksum_offset points fixed position of
f2fs_checkpoint structure:

"#define CP_CHKSUM_OFFSET	4092"

It is unnecessary, and it breaks the consecutiveness of nat and sit
bitmap stored across checkpoint park block and payload blocks.

This patch allows f2fs to handle unfixed .checksum_offset.

In addition, for the case checksum value is stored in the middle of
checkpoint park, calculating checksum value with superposition method
like we did for inode_checksum.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:11 -07:00
Youngjun Yoo 3a912b7732 f2fs: Replace spaces with tab
Modify coding style
ERROR: code indent should use tabs where possible

Signed-off-by: Youngjun Yoo <youngjun.willow@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:11 -07:00
Youngjun Yoo c456362b91 f2fs: insert space before the open parenthesis '('
Modify coding style
ERROR: space required before the open parenthesis '('

Signed-off-by: Youngjun Yoo <youngjun.willow@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:11 -07:00
Chao Yu d02a6e6174 f2fs: allow address pointer number of dnode aligning to specified size
This patch expands scalability of dnode layout, it allows address pointer
number of dnode aligning to specified size (now, the size is one byte by
default), and later the number can align to compress cluster size
(1 << n bytes, n=[2,..)), it can avoid cluster acrossing two dnode, making
design of compress meta layout simple.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:10 -07:00
Chao Yu 2df0ab0457 f2fs: introduce f2fs_read_single_page() for cleanup
This patch introduces f2fs_read_single_page() to wrap core operations
of reading one page in f2fs_mpage_readpages().

In addition, if we failed in f2fs_mpage_readpages(), propagate error
number to f2fs_read_data_page(), for f2fs_read_data_pages() path,
always return success.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:10 -07:00
Park Ju Hyung 5c533b19ae f2fs: mark is_extension_exist() inline
The caller set_file_temperature() is marked as inline as well.
It doesn't make much sense to leave is_extension_exist() un-inlined.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:10 -07:00
Chao Yu cd23ffa9fc f2fs: fix to set FI_UPDATE_WRITE correctly
This patch fixes to set FI_UPDATE_WRITE only if in-place IO was issued.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:10 -07:00
Chao Yu 05573d6ccf f2fs: fix to avoid panic in f2fs_inplace_write_data()
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203239

- Overview
When mounting the attached crafted image and running program, following errors are reported.
Additionally, it hangs on sync after running program.

The image is intentionally fuzzed from a normal f2fs image for testing.
Compile options for F2FS are as follows.
CONFIG_F2FS_FS=y
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_CHECK_FS=y

- Reproduces
cc poc_15.c
./run.sh f2fs
sync

- Kernel messages
 ------------[ cut here ]------------
 kernel BUG at fs/f2fs/segment.c:3162!
 RIP: 0010:f2fs_inplace_write_data+0x12d/0x160
 Call Trace:
  f2fs_do_write_data_page+0x3c1/0x820
  __write_data_page+0x156/0x720
  f2fs_write_cache_pages+0x20d/0x460
  f2fs_write_data_pages+0x1b4/0x300
  do_writepages+0x15/0x60
  __filemap_fdatawrite_range+0x7c/0xb0
  file_write_and_wait_range+0x2c/0x80
  f2fs_do_sync_file+0x102/0x810
  do_fsync+0x33/0x60
  __x64_sys_fsync+0xb/0x10
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

The reason is f2fs_inplace_write_data() will trigger kernel panic due
to data block locates in node type segment.

To avoid panic, let's just return error code and set SBI_NEED_FSCK to
give a hint to fsck for latter repairing.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:09 -07:00
Chao Yu e95bcdb2fe f2fs: fix to do sanity check on valid block count of segment
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203233

- Overview
When mounting the attached crafted image and running program, following errors are reported.
Additionally, it hangs on sync after running program.

The image is intentionally fuzzed from a normal f2fs image for testing.
Compile options for F2FS are as follows.
CONFIG_F2FS_FS=y
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_CHECK_FS=y

- Reproduces
cc poc_13.c
mkdir test
mount -t f2fs tmp.img test
cp a.out test
cd test
sudo ./a.out
sync

- Kernel messages
 F2FS-fs (sdb): Bitmap was wrongly set, blk:4608
 kernel BUG at fs/f2fs/segment.c:2102!
 RIP: 0010:update_sit_entry+0x394/0x410
 Call Trace:
  f2fs_allocate_data_block+0x16f/0x660
  do_write_page+0x62/0x170
  f2fs_do_write_node_page+0x33/0xa0
  __write_node_page+0x270/0x4e0
  f2fs_sync_node_pages+0x5df/0x670
  f2fs_write_checkpoint+0x372/0x1400
  f2fs_sync_fs+0xa3/0x130
  f2fs_do_sync_file+0x1a6/0x810
  do_fsync+0x33/0x60
  __x64_sys_fsync+0xb/0x10
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

sit.vblocks and sum valid block count in sit.valid_map may be
inconsistent, segment w/ zero vblocks will be treated as free
segment, while allocating in free segment, we may allocate a
free block, if its bitmap is valid previously, it can cause
kernel crash due to bitmap verification failure.

Anyway, to avoid further serious metadata inconsistence and
corruption, it is necessary and worth to detect SIT
inconsistence. So let's enable check_block_count() to verify
vblocks and valid_map all the time rather than do it only
CONFIG_F2FS_CHECK_FS is enabled.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:09 -07:00
Chao Yu 7b63f72f73 f2fs: fix to do sanity check on valid node/block count
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203229

- Overview
When mounting the attached crafted image, following errors are reported.
Additionally, it hangs on sync after trying to mount it.

The image is intentionally fuzzed from a normal f2fs image for testing.
Compile options for F2FS are as follows.
CONFIG_F2FS_FS=y
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_CHECK_FS=y

- Reproduces
mkdir test
mount -t f2fs tmp.img test
sync

- Kernel message
 kernel BUG at fs/f2fs/recovery.c:591!
 RIP: 0010:recover_data+0x12d8/0x1780
 Call Trace:
  f2fs_recover_fsync_data+0x613/0x710
  f2fs_fill_super+0x1043/0x1aa0
  mount_bdev+0x16d/0x1a0
  mount_fs+0x4a/0x170
  vfs_kern_mount+0x5d/0x100
  do_mount+0x200/0xcf0
  ksys_mount+0x79/0xc0
  __x64_sys_mount+0x1c/0x20
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

With corrupted image wihch has out-of-range valid node/block count, during
recovery, once we failed due to no free space, it will trigger kernel
panic.

Adding sanity check on valid node/block count in f2fs_sanity_check_ckpt()
to detect such condition, so that potential panic can be avoided.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:09 -07:00
Chao Yu 22d61e286e f2fs: fix to avoid panic in do_recover_data()
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203227

- Overview
When mounting the attached crafted image, following errors are reported.
Additionally, it hangs on sync after trying to mount it.

The image is intentionally fuzzed from a normal f2fs image for testing.
Compile options for F2FS are as follows.
CONFIG_F2FS_FS=y
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_CHECK_FS=y

- Reproduces
mkdir test
mount -t f2fs tmp.img test
sync

- Messages
 kernel BUG at fs/f2fs/recovery.c:549!
 RIP: 0010:recover_data+0x167a/0x1780
 Call Trace:
  f2fs_recover_fsync_data+0x613/0x710
  f2fs_fill_super+0x1043/0x1aa0
  mount_bdev+0x16d/0x1a0
  mount_fs+0x4a/0x170
  vfs_kern_mount+0x5d/0x100
  do_mount+0x200/0xcf0
  ksys_mount+0x79/0xc0
  __x64_sys_mount+0x1c/0x20
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

During recovery, if ofs_of_node is inconsistent in between recovered
node page and original checkpointed node page, let's just fail recovery
instead of making kernel panic.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:09 -07:00
Chao Yu 626bcf2b7c f2fs: fix to do sanity check on free nid
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203225

- Overview
When mounting the attached crafted image and unmounting it, following errors are reported.
Additionally, it hangs on sync after unmounting.

The image is intentionally fuzzed from a normal f2fs image for testing.
Compile options for F2FS are as follows.
CONFIG_F2FS_FS=y
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_CHECK_FS=y

- Reproduces
mkdir test
mount -t f2fs tmp.img test
touch test/t
umount test
sync

- Messages
 kernel BUG at fs/f2fs/node.c:3073!
 RIP: 0010:f2fs_destroy_node_manager+0x2f0/0x300
 Call Trace:
  f2fs_put_super+0xf4/0x270
  generic_shutdown_super+0x62/0x110
  kill_block_super+0x1c/0x50
  kill_f2fs_super+0xad/0xd0
  deactivate_locked_super+0x35/0x60
  cleanup_mnt+0x36/0x70
  task_work_run+0x75/0x90
  exit_to_usermode_loop+0x93/0xa0
  do_syscall_64+0xba/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0010:f2fs_destroy_node_manager+0x2f0/0x300

NAT table is corrupted, so reserved meta/node inode ids were added into
free list incorrectly, during file creation, since reserved id has cached
in inode hash, so it fails the creation and preallocated nid can not be
released later, result in kernel panic.

To fix this issue, let's do nid boundary check during free nid loading.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:09 -07:00
Chao Yu b42b179bda f2fs: fix to do checksum even if inode page is uptodate
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203221

- Overview
When mounting the attached crafted image and running program, this error is reported.

The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on.

- Reproduces
cc poc_07.c
mkdir test
mount -t f2fs tmp.img test
cp a.out test
cd test
sudo ./a.out

- Messages
 kernel BUG at fs/f2fs/node.c:1279!
 RIP: 0010:read_node_page+0xcf/0xf0
 Call Trace:
  __get_node_page+0x6b/0x2f0
  f2fs_iget+0x8f/0xdf0
  f2fs_lookup+0x136/0x320
  __lookup_slow+0x92/0x140
  lookup_slow+0x30/0x50
  walk_component+0x1c1/0x350
  path_lookupat+0x62/0x200
  filename_lookup+0xb3/0x1a0
  do_fchmodat+0x3e/0xa0
  __x64_sys_chmod+0x12/0x20
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

On below paths, we can have opportunity to readahead inode page
- gc_node_segment -> f2fs_ra_node_page
- gc_data_segment -> f2fs_ra_node_page
- f2fs_fill_dentries -> f2fs_ra_node_page

Unlike synchronized read, on readahead path, we can set page uptodate
before verifying page's checksum, then read_node_page() will trigger
kernel panic once it encounters a uptodated page w/ incorrect checksum.

So considering readahead scenario, we have to do checksum each time
when loading inode page even if it is uptodated.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:08 -07:00
Chao Yu 8b6810f8ac f2fs: fix to avoid panic in f2fs_remove_inode_page()
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203219

- Overview
When mounting the attached crafted image and running program, I got this error.
Additionally, it hangs on sync after running the program.

The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on.

- Reproduces
cc poc_06.c
mkdir test
mount -t f2fs tmp.img test
cp a.out test
cd test
sudo ./a.out
sync

- Messages
 kernel BUG at fs/f2fs/node.c:1183!
 RIP: 0010:f2fs_remove_inode_page+0x294/0x2d0
 Call Trace:
  f2fs_evict_inode+0x2a3/0x3a0
  evict+0xba/0x180
  __dentry_kill+0xbe/0x160
  dentry_kill+0x46/0x180
  dput+0xbb/0x100
  do_renameat2+0x3c9/0x550
  __x64_sys_rename+0x17/0x20
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

The reason is f2fs_remove_inode_page() will trigger kernel panic due to
inconsistent i_blocks value of inode.

To avoid panic, let's just print debug message and set SBI_NEED_FSCK to
give a hint to fsck for latter repairing of potential image corruption.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: fix build warning and add unlikely]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:08 -07:00
Chao Yu 546d22f070 f2fs: fix to clear dirty inode in error path of f2fs_iget()
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203217

- Overview
When mounting the attached crafted image and running program, I got this error.
Additionally, it hangs on sync after running the program.

The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on.

- Reproduces
cc poc_test_05.c
mkdir test
mount -t f2fs tmp.img test
sudo ./a.out
sync

- Messages
 kernel BUG at fs/f2fs/inode.c:707!
 RIP: 0010:f2fs_evict_inode+0x33f/0x3a0
 Call Trace:
  evict+0xba/0x180
  f2fs_iget+0x598/0xdf0
  f2fs_lookup+0x136/0x320
  __lookup_slow+0x92/0x140
  lookup_slow+0x30/0x50
  walk_component+0x1c1/0x350
  path_lookupat+0x62/0x200
  filename_lookup+0xb3/0x1a0
  do_readlinkat+0x56/0x110
  __x64_sys_readlink+0x16/0x20
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

During inode loading, __recover_inline_status() can recovery inode status
and set inode dirty, once we failed in following process, it will fail
the check in f2fs_evict_inode, result in trigger BUG_ON().

Let's clear dirty inode in error path of f2fs_iget() to avoid panic.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:08 -07:00
Chao Yu bda5239738 f2fs: remove new blank line of f2fs kernel message
Just removing '\n' in f2fs_msg(, "\n") to avoid redundant new blank line.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:08 -07:00
Chao Yu 6dc3a12663 f2fs: fix wrong __is_meta_io() macro
This patch changes codes as below:
- don't use is_read_io() as a condition to judge the meta IO.
- use .is_por to replace .is_meta to indicate IO is from recovery explicitly.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:07 -07:00
Chao Yu ea6d7e72fe f2fs: fix to avoid panic in dec_valid_node_count()
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203213

- Overview
When mounting the attached crafted image and running program, I got this error.
Additionally, it hangs on sync after running the this script.

The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on.

- Reproduces
mkdir test
mount -t f2fs tmp.img test
cp a.out test
cd test
sudo ./a.out
sync

 kernel BUG at fs/f2fs/f2fs.h:2012!
 RIP: 0010:truncate_node+0x2c9/0x2e0
 Call Trace:
  f2fs_truncate_xattr_node+0xa1/0x130
  f2fs_remove_inode_page+0x82/0x2d0
  f2fs_evict_inode+0x2a3/0x3a0
  evict+0xba/0x180
  __dentry_kill+0xbe/0x160
  dentry_kill+0x46/0x180
  dput+0xbb/0x100
  do_renameat2+0x3c9/0x550
  __x64_sys_rename+0x17/0x20
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

The reason is dec_valid_node_count() will trigger kernel panic due to
inconsistent count in between inode.i_blocks and actual block.

To avoid panic, let's just print debug message and set SBI_NEED_FSCK to
give a hint to fsck for latter repairing.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: fix build warning and add unlikely]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:07 -07:00
Chao Yu 5e159cd349 f2fs: fix to avoid panic in dec_valid_block_count()
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203209

- Overview
When mounting the attached crafted image and running program, I got this error.
Additionally, it hangs on sync after the this script.

The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on.

- Reproduces
cc poc_01.c
./run.sh f2fs
sync

 kernel BUG at fs/f2fs/f2fs.h:1788!
 RIP: 0010:f2fs_truncate_data_blocks_range+0x342/0x350
 Call Trace:
  f2fs_truncate_blocks+0x36d/0x3c0
  f2fs_truncate+0x88/0x110
  f2fs_setattr+0x3e1/0x460
  notify_change+0x2da/0x400
  do_truncate+0x6d/0xb0
  do_sys_ftruncate+0xf1/0x160
  do_syscall_64+0x43/0xf0
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

The reason is dec_valid_block_count() will trigger kernel panic due to
inconsistent count in between inode.i_blocks and actual block.

To avoid panic, let's just print debug message and set SBI_NEED_FSCK to
give a hint to fsck for latter repairing.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: fix build warning and add unlikely]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:07 -07:00
Chao Yu 622927f3b8 f2fs: fix to use inline space only if inline_xattr is enable
With below mkfs and mount option:

MKFS_OPTIONS  -- -O extra_attr -O project_quota -O inode_checksum -O flexible_inline_xattr -O inode_crtime -f
MOUNT_OPTIONS -- -o noinline_xattr

We may miss xattr data with below testcase:
- mkdir dir
- setfattr -n "user.name" -v 0 dir
- for ((i = 0; i < 190; i++)) do touch dir/$i; done
- umount
- mount
- getfattr -n "user.name" dir

user.name: No such attribute

The root cause is that we persist xattr data into reserved inline xattr
space, even if inline_xattr is not enable in inline directory inode, after
inline dentry conversion, reserved space no longer exists, so that xattr
data missed.

Let's use inline xattr space only if inline_xattr flag is set on inode
to fix this iusse.

Fixes: 6afc662e68 ("f2fs: support flexible inline xattr size")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:07 -07:00
Chao Yu 45a7468815 f2fs: fix to retrieve inline xattr space
With below mkfs and mount option, generic/339 of fstest will report that
scratch image becomes corrupted.

MKFS_OPTIONS  -- -O extra_attr -O project_quota -O inode_checksum -O flexible_inline_xattr -O inode_crtime -f /dev/zram1
MOUNT_OPTIONS -- -o acl,user_xattr -o discard,noinline_xattr /dev/zram1 /mnt/scratch_f2fs

[ASSERT] (f2fs_check_dirent_position:1315)  --> Wrong position of dirent pino:1970, name: (...)
level:8, dir_level:0, pgofs:951, correct range:[900, 901]

In old kernel, inline data and directory always reserved 200 bytes in
inode layout, even if inline_xattr is disabled, then new kernel tries
to retrieve that space for non-inline xattr inode, but for inline dentry,
its layout size should be fixed, so we just keep that reserved space.

But the problem here is that, after inline dentry conversion, inline
dentry layout no longer exists, if we still reserve inline xattr space,
after dents updates, there will be a hole in inline xattr space, which
can break hierarchy hash directory structure.

This patch fixes this issue by retrieving inline xattr space after
inline dentry conversion.

Fixes: 6afc662e68 ("f2fs: support flexible inline xattr size")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:06 -07:00
Chao Yu 988385795c f2fs: fix error path of recovery
There are some places in where we missed to unlock page or unlock page
incorrectly, fix them.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:06 -07:00
Chao Yu 793ab1c8a7 f2fs: fix to avoid deadloop in foreground GC
As Jungyeon reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=203211

- Overview
When mounting the attached crafted image and making a new file, I got this error and the error messages keep repeating.

The image is intentionally fuzzed from a normal f2fs image for testing and I run with option CONFIG_F2FS_CHECK_FS on.

- Reproduces
mkdir test
mount -t f2fs tmp.img test
cd test
touch t

- Messages
[   58.820451] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.821485] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.822530] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.823571] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.824616] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.825640] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.826663] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.827698] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.828719] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.829759] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.830783] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.831828] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.832869] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.833888] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.834945] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.835996] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.837028] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.838051] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.839072] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.840100] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.841147] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.842186] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.843214] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.844267] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.845282] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.846305] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
[   58.847341] F2FS-fs (sdb): Inconsistent segment (1) type [1, 0] in SSA and SIT
... (repeating)

During GC, if segment type stored in SSA and SIT is inconsistent, we just
skip migrating current segment directly, since we need to know the exact
type to decide the migration function we use.

So in foreground GC, we will easily run into a infinite loop as we may
select the same victim segment which has inconsistent type due to greedy
policy. In order to end up this, we choose to shutdown filesystem. For
backgrond GC, we need to do that as well, so that we can avoid latter
potential infinite looped foreground GC.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2019-05-08 21:23:06 -07:00
Linus Torvalds ef75bd71c5 We've got the following patches ready for this merge window:
"gfs2: Fix loop in gfs2_rbm_find (v2)"
 
   A rework of a fix we ended up reverting in 5.0 because of an iozone
   performance regression.
 
 "gfs2: read journal in large chunks" and
 "gfs2: fix race between gfs2_freeze_func and unmount"
 
   An improved version of a commit we also ended up reverting in 5.0
   because of a regression in xfstest generic/311.  It turns out that the
   journal changes were mostly innocent and that unfreeze didn't wait for
   the freeze to complete, which caused the filesystem to be unmounted
   before it was actually idle.
 
 "gfs2: Fix occasional glock use-after-free"
 "gfs2: Fix iomap write page reclaim deadlock"
 "gfs2: Fix lru_count going negative"
 
   Fixes for various problems reported and partially fixed by Citrix
   engineers.  Thank you very much.
 
 "gfs2: clean_journal improperly set sd_log_flush_head"
 
   Another fix from Bob.
 
 A few other minor cleanups.
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Merge tag 'gfs2-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull GFS2 updates from Andreas Gruenbacher:
 "We've got the following patches ready for this merge window:

   - "gfs2: Fix loop in gfs2_rbm_find (v2)"

      A rework of a fix we ended up reverting in 5.0 because of an
      iozone performance regression.

   - "gfs2: read journal in large chunks"
     "gfs2: fix race between gfs2_freeze_func and unmount"

      An improved version of a commit we also ended up reverting in 5.0
      because of a regression in xfstest generic/311. It turns out that
      the journal changes were mostly innocent and that unfreeze didn't
      wait for the freeze to complete, which caused the filesystem to be
      unmounted before it was actually idle.

   - "gfs2: Fix occasional glock use-after-free"
     "gfs2: Fix iomap write page reclaim deadlock"
     "gfs2: Fix lru_count going negative"

      Fixes for various problems reported and partially fixed by Citrix
      engineers. Thank you very much.

   - "gfs2: clean_journal improperly set sd_log_flush_head"

      Another fix from Bob.

   - .. and a few other minor cleanups"

* tag 'gfs2-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: read journal in large chunks
  gfs2: Fix iomap write page reclaim deadlock
  gfs2: fix race between gfs2_freeze_func and unmount
  gfs2: Rename gfs2_trans_{add_unrevoke => remove_revoke}
  gfs2: Rename sd_log_le_{revoke,ordered}
  gfs2: Remove unnecessary extern declarations
  gfs2: Remove misleading comments in gfs2_evict_inode
  gfs2: Replace gl_revokes with a GLF flag
  gfs2: Fix occasional glock use-after-free
  gfs2: clean_journal improperly set sd_log_flush_head
  gfs2: Fix lru_count going negative
  gfs2: Fix loop in gfs2_rbm_find (v2)
2019-05-08 13:16:07 -07:00
Linus Torvalds 78d9affbb0 CIFS/SMB3 changes, three for stable, adds fiemap support, improves zero-range support, and includes various RDMA (smb direct fixes)
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Merge tag '5.2-smb3' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "CIFS/SMB3 changes:

   - three fixes for stable

   - add fiemap support

   - improve zero-range support

   - various RDMA (smb direct fixes)

  I have an additional set of fixes (for improved handling of sparse
  files, mode bits, POSIX extensions) that are still being tested that
  are not included in this pull request but I expect to send in the next
  week"

* tag '5.2-smb3' of git://git.samba.org/sfrench/cifs-2.6: (29 commits)
  cifs: update module internal version number
  SMB3: Clean up query symlink when reparse point
  cifs: fix strcat buffer overflow and reduce raciness in smb21_set_oplock_level()
  Negotiate and save preferred compression algorithms
  cifs: rename and clarify CIFS_ASYNC_OP and CIFS_NO_RESP
  cifs: fix credits leak for SMB1 oplock breaks
  smb3: Add protocol structs for change notify support
  cifs: fix smb3_zero_range for Azure
  cifs: zero-range does not require the file is sparse
  Add new flag on SMB3.1.1 read
  cifs: add fiemap support
  SMB3: Add defines for new negotiate contexts
  cifs: fix bi-directional fsctl passthrough calls
  cifs: smbd: take an array of reqeusts when sending upper layer data
  SMB3: Add handling for different FSCTL access flags
  cifs: Add support for FSCTL passthrough that write data to the server
  cifs: remove superfluous inode_lock in cifs_{strict_}fsync
  cifs: Call MID callback before destroying transport
  cifs: smbd: Retry on memory registration failure
  cifs: smbd: Indicate to retry on transport sending failure
  ...
2019-05-08 13:06:18 -07:00
zhangliguang 9031a69cf9 fuse: clean up fuse_alloc_inode
This patch cleans up fuse_alloc_inode function, just simply the code, no
logic change.

Signed-off-by: zhangliguang <zhangliguang@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-05-08 13:58:29 +02:00
Amir Goldstein acf3062a7e ovl: relax WARN_ON() for overlapping layers use case
This nasty little syzbot repro:
https://syzkaller.appspot.com/x/repro.syz?x=12c7a94f400000

Creates overlay mounts where the same directory is both in upper and lower
layers. Simplified example:

  mkdir foo work
  mount -t overlay none foo -o"lowerdir=.,upperdir=foo,workdir=work"

The repro runs several threads in parallel that attempt to chdir into foo
and attempt to symlink/rename/exec/mkdir the file bar.

The repro hits a WARN_ON() I placed in ovl_instantiate(), which suggests
that an overlay inode already exists in cache and is hashed by the pointer
of the real upper dentry that ovl_create_real() has just created. At the
point of the WARN_ON(), for overlay dir inode lock is held and upper dir
inode lock, so at first, I did not see how this was possible.

On a closer look, I see that after ovl_create_real(), because of the
overlapping upper and lower layers, a lookup by another thread can find the
file foo/bar that was just created in upper layer, at overlay path
foo/foo/bar and hash the an overlay inode with the new real dentry as lower
dentry. This is possible because the overlay directory foo/foo is not
locked and the upper dentry foo/bar is in dcache, so ovl_lookup() can find
it without taking upper dir inode shared lock.

Overlapping layers is considered a wrong setup which would result in
unexpected behavior, but it shouldn't crash the kernel and it shouldn't
trigger WARN_ON() either, so relax this WARN_ON() and leave a pr_warn()
instead to cover all cases of failure to get an overlay inode.

The error returned from failure to insert new inode to cache with
inode_insert5() was changed to -EEXIST, to distinguish from the error
-ENOMEM returned on failure to get/allocate inode with iget5_locked().

Reported-by: syzbot+9c69c282adc4edd2b540@syzkaller.appspotmail.com
Fixes: 01b39dcc95 ("ovl: use inode_insert5() to hash a newly...")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-05-08 13:25:53 +02:00
YueHaibing 35399f87e2 configfs: fix possible use-after-free in configfs_register_group
In configfs_register_group(), if create_default_group() failed, we
forget to unlink the group. It will left a invalid item in the parent list,
which may trigger the use-after-free issue seen below:

BUG: KASAN: use-after-free in __list_add_valid+0xd4/0xe0 lib/list_debug.c:26
Read of size 8 at addr ffff8881ef61ae20 by task syz-executor.0/5996

CPU: 1 PID: 5996 Comm: syz-executor.0 Tainted: G         C        5.0.0+ #5
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xa9/0x10e lib/dump_stack.c:113
 print_address_description+0x65/0x270 mm/kasan/report.c:187
 kasan_report+0x149/0x18d mm/kasan/report.c:317
 __list_add_valid+0xd4/0xe0 lib/list_debug.c:26
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 link_obj+0xb0/0x190 fs/configfs/dir.c:759
 link_group+0x1c/0x130 fs/configfs/dir.c:784
 configfs_register_group+0x56/0x1e0 fs/configfs/dir.c:1751
 configfs_register_default_group+0x72/0xc0 fs/configfs/dir.c:1834
 ? 0xffffffffc1be0000
 iio_sw_trigger_init+0x23/0x1000 [industrialio_sw_trigger]
 do_one_initcall+0xbc/0x47d init/main.c:887
 do_init_module+0x1b5/0x547 kernel/module.c:3456
 load_module+0x6405/0x8c10 kernel/module.c:3804
 __do_sys_finit_module+0x162/0x190 kernel/module.c:3898
 do_syscall_64+0x9f/0x450 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462e99
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f494ecbcc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f494ecbcc70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f494ecbd6bc
R13: 00000000004bcefa R14: 00000000006f6fb0 R15: 0000000000000004

Allocated by task 5987:
 set_track mm/kasan/common.c:87 [inline]
 __kasan_kmalloc.constprop.3+0xa0/0xd0 mm/kasan/common.c:497
 kmalloc include/linux/slab.h:545 [inline]
 kzalloc include/linux/slab.h:740 [inline]
 configfs_register_default_group+0x4c/0xc0 fs/configfs/dir.c:1829
 0xffffffffc1bd0023
 do_one_initcall+0xbc/0x47d init/main.c:887
 do_init_module+0x1b5/0x547 kernel/module.c:3456
 load_module+0x6405/0x8c10 kernel/module.c:3804
 __do_sys_finit_module+0x162/0x190 kernel/module.c:3898
 do_syscall_64+0x9f/0x450 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 5987:
 set_track mm/kasan/common.c:87 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:459
 slab_free_hook mm/slub.c:1429 [inline]
 slab_free_freelist_hook mm/slub.c:1456 [inline]
 slab_free mm/slub.c:3003 [inline]
 kfree+0xe1/0x270 mm/slub.c:3955
 configfs_register_default_group+0x9a/0xc0 fs/configfs/dir.c:1836
 0xffffffffc1bd0023
 do_one_initcall+0xbc/0x47d init/main.c:887
 do_init_module+0x1b5/0x547 kernel/module.c:3456
 load_module+0x6405/0x8c10 kernel/module.c:3804
 __do_sys_finit_module+0x162/0x190 kernel/module.c:3898
 do_syscall_64+0x9f/0x450 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881ef61ae00
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 32 bytes inside of
 192-byte region [ffff8881ef61ae00, ffff8881ef61aec0)
The buggy address belongs to the page:
page:ffffea0007bd8680 count:1 mapcount:0 mapping:ffff8881f6c03000 index:0xffff8881ef61a700
flags: 0x2fffc0000000200(slab)
raw: 02fffc0000000200 ffffea0007ca4740 0000000500000005 ffff8881f6c03000
raw: ffff8881ef61a700 000000008010000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881ef61ad00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881ef61ad80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff8881ef61ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff8881ef61ae80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881ef61af00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb

Fixes: 5cf6a51e60 ("configfs: allow dynamic group creation")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-05-08 08:55:19 +02:00
Linus Torvalds 80f232121b Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Highlights:

   1) Support AES128-CCM ciphers in kTLS, from Vakul Garg.

   2) Add fib_sync_mem to control the amount of dirty memory we allow to
      queue up between synchronize RCU calls, from David Ahern.

   3) Make flow classifier more lockless, from Vlad Buslov.

   4) Add PHY downshift support to aquantia driver, from Heiner
      Kallweit.

   5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces
      contention on SLAB spinlocks in heavy RPC workloads.

   6) Partial GSO offload support in XFRM, from Boris Pismenny.

   7) Add fast link down support to ethtool, from Heiner Kallweit.

   8) Use siphash for IP ID generator, from Eric Dumazet.

   9) Pull nexthops even further out from ipv4/ipv6 routes and FIB
      entries, from David Ahern.

  10) Move skb->xmit_more into a per-cpu variable, from Florian
      Westphal.

  11) Improve eBPF verifier speed and increase maximum program size,
      from Alexei Starovoitov.

  12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit
      spinlocks. From Neil Brown.

  13) Allow tunneling with GUE encap in ipvs, from Jacky Hu.

  14) Improve link partner cap detection in generic PHY code, from
      Heiner Kallweit.

  15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan
      Maguire.

  16) Remove SKB list implementation assumptions in SCTP, your's truly.

  17) Various cleanups, optimizations, and simplifications in r8169
      driver. From Heiner Kallweit.

  18) Add memory accounting on TX and RX path of SCTP, from Xin Long.

  19) Switch PHY drivers over to use dynamic featue detection, from
      Heiner Kallweit.

  20) Support flow steering without masking in dpaa2-eth, from Ioana
      Ciocoi.

  21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri
      Pirko.

  22) Increase the strict parsing of current and future netlink
      attributes, also export such policies to userspace. From Johannes
      Berg.

  23) Allow DSA tag drivers to be modular, from Andrew Lunn.

  24) Remove legacy DSA probing support, also from Andrew Lunn.

  25) Allow ll_temac driver to be used on non-x86 platforms, from Esben
      Haabendal.

  26) Add a generic tracepoint for TX queue timeouts to ease debugging,
      from Cong Wang.

  27) More indirect call optimizations, from Paolo Abeni"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits)
  cxgb4: Fix error path in cxgb4_init_module
  net: phy: improve pause mode reporting in phy_print_status
  dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings
  net: macb: Change interrupt and napi enable order in open
  net: ll_temac: Improve error message on error IRQ
  net/sched: remove block pointer from common offload structure
  net: ethernet: support of_get_mac_address new ERR_PTR error
  net: usb: smsc: fix warning reported by kbuild test robot
  staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
  net: dsa: support of_get_mac_address new ERR_PTR error
  net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats
  vrf: sit mtu should not be updated when vrf netdev is the link
  net: dsa: Fix error cleanup path in dsa_init_module
  l2tp: Fix possible NULL pointer dereference
  taprio: add null check on sched_nest to avoid potential null pointer dereference
  net: mvpp2: cls: fix less than zero check on a u32 variable
  net_sched: sch_fq: handle non connected flows
  net_sched: sch_fq: do not assume EDT packets are ordered
  net: hns3: use devm_kcalloc when allocating desc_cb
  net: hns3: some cleanup for struct hns3_enet_ring
  ...
2019-05-07 22:03:58 -07:00
Linus Torvalds a9fbcd6728 Clean up fscrypt's dcache revalidation support, and other
miscellaneous cleanups.
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Merge tag 'fscrypt_for_linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt

Pull fscrypt updates from Ted Ts'o:
 "Clean up fscrypt's dcache revalidation support, and other
  miscellaneous cleanups"

* tag 'fscrypt_for_linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fscrypt: cache decrypted symlink target in ->i_link
  vfs: use READ_ONCE() to access ->i_link
  fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext
  fscrypt: only set dentry_operations on ciphertext dentries
  fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
  fscrypt: fix race allowing rename() and link() of ciphertext dentries
  fscrypt: clean up and improve dentry revalidation
  fscrypt: use READ_ONCE() to access ->i_crypt_info
  fscrypt: remove WARN_ON_ONCE() when decryption fails
  fscrypt: drop inode argument from fscrypt_get_ctx()
2019-05-07 21:28:04 -07:00
Steve French cb4f7bf6be cifs: update module internal version number
To 2.20

Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:56 -05:00
Ronnie Sahlberg ebaf546a55 SMB3: Clean up query symlink when reparse point
Two of the common symlink formats use reparse points
(unlike mfsymlinks and also unlike the SMB1 posix
extensions).  This is the first part of the fixes
to allow these reparse points (NFS style and Windows
symlinks) to be resolved properly as symlinks by the
client.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Christoph Probst 6a54b2e002 cifs: fix strcat buffer overflow and reduce raciness in smb21_set_oplock_level()
Change strcat to strncpy in the "None" case to fix a buffer overflow
when cinode->oplock is reset to 0 by another thread accessing the same
cinode. It is never valid to append "None" to any other message.

Consolidate multiple writes to cinode->oplock to reduce raciness.

Signed-off-by: Christoph Probst <kernel@probst.it>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
2019-05-07 23:24:55 -05:00
Steve French 26ea888f62 Negotiate and save preferred compression algorithms
New negotiate context (3) allows the server and client to
negotiate which compression algorithms to use. Add support
for this and save it off in the server structure.

Also now displayed in /proc/fs/cifs/DebugData (see below example
to Windows 10) where compression algoirthm "LZ77" was negotiated:

Servers:
Number of credits: 326 Dialect 0x311 COMPRESS_LZ77 signed
1) Name: 192.168.92.17 Uses: 1 Capability: 0x300067	Session Status: 1 TCP status: 1 Instance: 1

See MS-XCA and MS-SMB2 2.2.3.1 for more details.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg 392e1c5dc9 cifs: rename and clarify CIFS_ASYNC_OP and CIFS_NO_RESP
The flags were named confusingly.
CIFS_ASYNC_OP now just means that we will not block waiting for credits
to become available so we thus rename this to be CIFS_NON_BLOCKING.

Change CIFS_NO_RESP to CIFS_NO_RSP_BUF to clarify that we will actually get a
response from the server but we will not get/do not want a response buffer.

Delete CIFSSMBNotify. This is an SMB1 function that is not used.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg d69cb728e7 cifs: fix credits leak for SMB1 oplock breaks
For SMB1 oplock breaks we would grab one credit while sending the PDU
but we would never relese the credit back since we will never receive a
response to this from the server. Eventuallt this would lead to a hang
once all credits are leaked.

Fix this by defining a new flag CIFS_NO_SRV_RSP which indicates that there
is no server response to this command and thus we need to add any credits back
immediately after sending the PDU.

CC: Stable <stable@vger.kernel.org> #v5.0+
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Steve French edf3ef3707 smb3: Add protocol structs for change notify support
Add the SMB3 protocol flag definitions and structs for
change notify.  Future patches will add the hooks to
allow it to be invoked from the client.

See MS-FSCC 2.6 and MS-SMB2 2.2.35

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg c425014afd cifs: fix smb3_zero_range for Azure
For zero-range that also extend the file we were sending this as a
compound of two different operations; a fsctl to set-zero-data for the range
and then an additional set-info to extend the file size.
This does not work for Azure since it does not support this fsctl which leads
to fallocate(FALLOC_FL_ZERO_RANGE) failing but still changing the file size.

To fix this we un-compound this and send these two operations as separate
commands, firsat one command to set-zero-data for the range and it this
was successful we proceed to send a set-info to update the file size.

This fixes xfstest generic/469 for Azure servers.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg c7fe388d76 cifs: zero-range does not require the file is sparse
Remove the conditional to fail zero-range if the file is not flagged as sparse.
You can still zero out a range in SMB2 even for non-sparse files.

Tested with stock windows16 server.

Fixes 5 xfstests (033, 149, 155, 180, 349)

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Steve French 0df7edd9dc Add new flag on SMB3.1.1 read
For compressed read support.  See MS-SMB2 3.1.4.4

Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg 2f3ebaba13 cifs: add fiemap support
Useful for improved copy performance as well as for
applications which query allocated ranges of sparse
files.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Steve French d7bef4c4eb SMB3: Add defines for new negotiate contexts
See the latest MS-SMB2 protocol specification updates.
These will be needed for implementing compression support
on the wire for example.

Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg 5242fcb706 cifs: fix bi-directional fsctl passthrough calls
SMB2 Ioctl responses from servers may respond with both the request blob from
the client followed by the actual reply blob for ioctls that are bi-directional.

In that case we can not assume that the reply blob comes immediately after the
ioctl response structure.

This fixes FSCTLs such as SMB2:FSCTL_QUERY_ALLOCATED_RANGES

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Long Li 4739f23286 cifs: smbd: take an array of reqeusts when sending upper layer data
To support compounding, __smb_send_rqst() now sends an array of requests to
the transport layer.
Change smbd_send() to take an array of requests, and send them in as few
packets as possible.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
2019-05-07 23:24:55 -05:00
Steve French 46e6661963 SMB3: Add handling for different FSCTL access flags
DesiredAccess field in SMB3 open request needs
to be set differently for READ vs. WRITE ioctls
(not just ones that request both).

Originally noticed by Pavel

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2019-05-07 23:24:55 -05:00
Ronnie Sahlberg efac779b1c cifs: Add support for FSCTL passthrough that write data to the server
Add support to pass a blob to the server in FSCTL passthrough.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Jeff Layton 0ae3fa4dc1 cifs: remove superfluous inode_lock in cifs_{strict_}fsync
Originally, filemap_write_and_wait took the i_mutex internally, but
commit 02c24a8218 pushed the mutex acquisition into the individual
fsync routines, leaving it up to the subsystem maintainers to remove
it if it wasn't needed.

For cifs, I see no reason to take the inode_lock here. All of the
operations inside that lock are protected in other ways.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-05-07 23:24:55 -05:00
Long Li 214bab4484 cifs: Call MID callback before destroying transport
When transport is being destroyed, it's possible that some processes may
hold memory registrations that need to be deregistred.

Call them first so nobody is using transport resources, and it can be
destroyed.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Long Li b797209219 cifs: smbd: Retry on memory registration failure
Memory registration failure doesn't mean this I/O has failed, it means the
transport is hitting I/O error or needs reconnect. This error is not from
the server.

Indicate this error to upper layer, and let upper layer decide how to
reconnect and proceed with this I/O.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:55 -05:00
Long Li 62fdf6707e cifs: smbd: Indicate to retry on transport sending failure
Failure to send a packet doesn't mean it's a permanent failure, it can't be
returned to user process. This I/O should be retried or failed based on
server packet response and transport health. This logic is handled by the
upper layer.

Give this decision to upper layer.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Long Li 98e0d40888 cifs: smbd: Return EINTR when interrupted
When packets are waiting for outbound I/O and interrupted, return the
proper error code to user process.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Long Li e8b3bfe9bc cifs: smbd: Don't destroy transport on RDMA disconnect
Now upper layer is handling the transport shutdown and reconnect, remove
the code that handling transport shutdown on RDMA disconnect.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Long Li 050b8c3740 smbd: Make upper layer decide when to destroy the transport
On transport recoonect, upper layer CIFS code destroys the current
transport and then recoonect. This code path is not used by SMBD, in that
SMBD destroys its transport on RDMA disconnect notification independent of
CIFS upper layer behavior.

This approach adds some costs to SMBD layer to handle transport shutdown
and restart, and to deal with several racing conditions on reconnecting
transport.

Re-work this code path by introducing a new smbd_destroy. This function is
called form upper layer to ask SMBD to destroy the transport. SMBD will no
longer need to destroy the transport by itself while worrying about data
transfer is in progress. The upper layer guarantees the transport is
locked.

change log:
v2: fix build errors when CONFIG_CIFS_SMB_DIRECT is not configured

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Steve French 973189aba6 SMB3: update comment to clarify enumerating snapshots
Trivial update to comment suggested by Pavel.

Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Aurelien Aptel d070f9dd62 CIFS: check CIFS_MOUNT_NO_DFS when trying to reuse existing sb
if we mount A then mount A again with nodfs, we shouldn't reuse the
superblock. document the purpose of the defines as well.

there are most likely more flags that needs to be added to this mask,
in fact the logic to find them should be which flag should
be *ignored* when trying to reuse an existing sb.

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Kenneth D'souza c8b6ac1a9d CIFS: Show locallease in /proc/mounts for cifs shares mounted with locallease feature.
Missing parameter that should be displayed in the mount list

Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Kenneth D'souza <kdsouza@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Paulo Alcantara (SUSE) 5072010ccf cifs: Fix DFS cache refresher for DFS links
As per MS-DFSC, when a DFS cache entry is expired and it is a DFS
link, then a new DFS referral must be sent to root server in order to
refresh the expired entry.

This patch ensures that all new DFS referrals for refreshing the cache
are sent to DFS root.

Signed-off-by: Paulo Alcantara (SUSE) <paulo@paulo.ac>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Sergey Senozhatsky f5307104e7 cifs: don't use __constant_cpu_to_le32()
A trivial patch.

cpu_to_le32() is capable enough to detect __builtin_constant_p()
and to use an appropriate compile time ___constant_swahb32()
function.

So we can use cpu_to_le32() instead of __constant_cpu_to_le32().

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Steve French 433b8dd767 SMB3: Track total time spent on roundtrips for each SMB3 command
Also track minimum and maximum time by command in /proc/fs/cifs/Stats

Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-07 23:24:54 -05:00
Linus Torvalds 5abe37954e Add as a feature case-insensitive directories (the casefold feature)
using Unicode 12.1.  Also, the usual largish number of cleanups and bug
 fixes.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "Add as a feature case-insensitive directories (the casefold feature)
  using Unicode 12.1.

  Also, the usual largish number of cleanups and bug fixes"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (25 commits)
  ext4: export /sys/fs/ext4/feature/casefold if Unicode support is present
  ext4: fix ext4_show_options for file systems w/o journal
  unicode: refactor the rule for regenerating utf8data.h
  docs: ext4.rst: document case-insensitive directories
  ext4: Support case-insensitive file name lookups
  ext4: include charset encoding information in the superblock
  MAINTAINERS: add Unicode subsystem entry
  unicode: update unicode database unicode version 12.1.0
  unicode: introduce test module for normalized utf8 implementation
  unicode: implement higher level API for string handling
  unicode: reduce the size of utf8data[]
  unicode: introduce code for UTF-8 normalization
  unicode: introduce UTF-8 character database
  ext4: actually request zeroing of inode table after grow
  ext4: cond_resched in work-heavy group loops
  ext4: fix use-after-free race with debug_want_extra_isize
  ext4: avoid drop reference to iloc.bh twice
  ext4: ignore e_value_offs for xattrs with value-in-ea-inode
  ext4: protect journal inode's blocks using block_validity
  ext4: use BUG() instead of BUG_ON(1)
  ...
2019-05-07 21:12:44 -07:00
Linus Torvalds e5fef2a973 AFS Development
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Merge tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull AFS updates from David Howells:
 "A set of fix and development patches for AFS for 5.2.

  Summary:

   - Fix the AFS file locking so that sqlite can run on an AFS mount and
     also so that firefox and gnome can use a homedir that's mounted
     through AFS.

     This required emulation of fine-grained locking when the server
     will only support whole-file locks and no upgrade/downgrade. Four
     modes are provided, settable by mount parameter:

       "flock=local"   - No reference to the server

       "flock=openafs" - Fine-grained locks are local-only, whole-file
                         locks require sufficient server locks

       "flock=strict"  - All locks require sufficient server locks

       "flock=write"   - Always get an exclusive server lock

     If the volume is a read-only or backup volume, then flock=local for
     that volume.

   - Log extra information for a couple of cases where the client mucks
     up somehow: AFS vnode with undefined type and dir check failure -
     in both cases we seem to end up with unfilled data, but the issues
     happen infrequently and are difficult to reproduce at will.

   - Implement silly rename for unlink() and rename().

   - Set i_blocks so that du can get some information about usage.

   - Fix xattr handlers to return the right amount of data and to not
     overflow buffers.

   - Implement getting/setting raw AFS and YFS ACLs as xattrs"

* tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Implement YFS ACL setting
  afs: Get YFS ACLs and information through xattrs
  afs: implement acl setting
  afs: Get an AFS3 ACL as an xattr
  afs: Fix getting the afs.fid xattr
  afs: Fix the afs.cell and afs.volume xattr handlers
  afs: Calculate i_blocks based on file size
  afs: Log more information for "kAFS: AFS vnode with undefined type\n"
  afs: Provide mount-time configurable byte-range file locking emulation
  afs: Add more tracepoints
  afs: Implement sillyrename for unlink and rename
  afs: Add directory reload tracepoint
  afs: Handle lock rpc ops failing on a file that got deleted
  afs: Improve dir check failure reports
  afs: Add file locking tracepoints
  afs: Further fix file locking
  afs: Fix AFS file locking to allow fine grained locks
  afs: Calculate lock extend timer from set/extend reply reception
  afs: Split wait from afs_make_call()
2019-05-07 20:51:58 -07:00
Linus Torvalds 149e703cb8 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro:
 "Assorted stuff, with no common topic whatsoever..."

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  libfs: document simple_get_link()
  Documentation/filesystems/Locking: fix ->get_link() prototype
  Documentation/filesystems/vfs.txt: document how ->i_link works
  Documentation/filesystems/vfs.txt: remove bogus "Last updated" date
  fs: use timespec64 in relatime_need_update
  fs/block_dev.c: remove unused include
2019-05-07 20:50:27 -07:00
Linus Torvalds 400913252d Merge branch 'work.mount-syscalls' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull mount ABI updates from Al Viro:
 "The syscalls themselves, finally.

  That's not all there is to that stuff, but switching individual
  filesystems to new methods is fortunately independent from everything
  else, so e.g. NFS series can go through NFS tree, etc.

  As those conversions get done, we'll be finally able to get rid of a
  bunch of duplication in fs/super.c introduced in the beginning of the
  entire thing. I expect that to be finished in the next window..."

* 'work.mount-syscalls' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: Add a sample program for the new mount API
  vfs: syscall: Add fspick() to select a superblock for reconfiguration
  vfs: syscall: Add fsmount() to create a mount for a superblock
  vfs: syscall: Add fsconfig() for configuring and managing a context
  vfs: Implement logging through fs_context
  vfs: syscall: Add fsopen() to prepare for superblock creation
  Make anon_inodes unconditional
  teach move_mount(2) to work with OPEN_TREE_CLONE
  vfs: syscall: Add move_mount(2) to move mounts around
  vfs: syscall: Add open_tree(2) to reference or clone a mount
2019-05-07 20:17:51 -07:00
Linus Torvalds d27fb65bc2 Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc dcache updates from Al Viro:
 "Most of this pile is putting name length into struct name_snapshot and
  making use of it.

  The beginning of this series ("ovl_lookup_real_one(): don't bother
  with strlen()") ought to have been split in two (separate switch of
  name_snapshot to struct qstr from overlayfs reaping the trivial
  benefits of that), but I wanted to avoid a rebase - by the time I'd
  spotted that it was (a) in -next and (b) close to 5.1-final ;-/"

* 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  audit_compare_dname_path(): switch to const struct qstr *
  audit_update_watch(): switch to const struct qstr *
  inotify_handle_event(): don't bother with strlen()
  fsnotify: switch send_to_group() and ->handle_event to const struct qstr *
  fsnotify(): switch to passing const struct qstr * for file_name
  switch fsnotify_move() to passing const struct qstr * for old_name
  ovl_lookup_real_one(): don't bother with strlen()
  sysv: bury the broken "quietly truncate the long filenames" logics
  nsfs: unobfuscate
  unexport d_alloc_pseudo()
2019-05-07 20:03:32 -07:00
Linus Torvalds f72dae2089 selinux/stable-5.2 PR 20190507
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Merge tag 'selinux-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux updates from Paul Moore:
 "We've got a few SELinux patches for the v5.2 merge window, the
  highlights are below:

   - Add LSM hooks, and the SELinux implementation, for proper labeling
     of kernfs. While we are only including the SELinux implementation
     here, the rest of the LSM folks have given the hooks a thumbs-up.

   - Update the SELinux mdp (Make Dummy Policy) script to actually work
     on a modern system.

   - Disallow userspace to change the LSM credentials via
     /proc/self/attr when the task's credentials are already overridden.

     The change was made in procfs because all the LSM folks agreed this
     was the Right Thing To Do and duplicating it across each LSM was
     going to be annoying"

* tag 'selinux-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  proc: prevent changes to overridden credentials
  selinux: Check address length before reading address family
  kernfs: fix xattr name handling in LSM helpers
  MAINTAINERS: update SELinux file patterns
  selinux: avoid uninitialized variable warning
  selinux: remove useless assignments
  LSM: lsm_hooks.h - fix missing colon in docstring
  selinux: Make selinux_kernfs_init_security static
  kernfs: initialize security of newly created nodes
  selinux: implement the kernfs_init_security hook
  LSM: add new hook for kernfs node initialization
  kernfs: use simple_xattrs for security attributes
  selinux: try security xattr after genfs for kernfs filesystems
  kernfs: do not alloc iattrs in kernfs_xattr_get
  kernfs: clean up struct kernfs_iattrs
  scripts/selinux: fix build
  selinux: use kernel linux/socket.h for genheaders and mdp
  scripts/selinux: modernize mdp
2019-05-07 18:48:09 -07:00
Linus Torvalds 52ae2456d6 for-5.2/io_uring-20190507
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Merge tag 'for-5.2/io_uring-20190507' of git://git.kernel.dk/linux-block

Pull io_uring updates from Jens Axboe:
 "Set of changes/improvements for io_uring. This contains:

   - Fix of a shadowed variable (Colin)

   - Add support for draining commands (me)

   - Add support for sync_file_range() (me)

   - Add eventfd support (me)

   - cpu_online() fix (Shenghui)

   - Removal of a redundant ->error assignment (Stefan)"

* tag 'for-5.2/io_uring-20190507' of git://git.kernel.dk/linux-block:
  io_uring: use cpu_online() to check p->sq_thread_cpu instead of cpu_possible()
  io_uring: fix shadowed variable ret return code being not checked
  req->error only used for iopoll
  io_uring: add support for eventfd notifications
  io_uring: add support for IORING_OP_SYNC_FILE_RANGE
  fs: add sync_file_range() helper
  io_uring: add support for marking commands as draining
2019-05-07 18:30:11 -07:00
Linus Torvalds 67a2422239 for-5.2/block-20190507
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Merge tag 'for-5.2/block-20190507' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:
 "Nothing major in this series, just fixes and improvements all over the
  map. This contains:

   - Series of fixes for sed-opal (David, Jonas)

   - Fixes and performance tweaks for BFQ (via Paolo)

   - Set of fixes for bcache (via Coly)

   - Set of fixes for md (via Song)

   - Enabling multi-page for passthrough requests (Ming)

   - Queue release fix series (Ming)

   - Device notification improvements (Martin)

   - Propagate underlying device rotational status in loop (Holger)

   - Removal of mtip32xx trim support, which has been disabled for years
     (Christoph)

   - Improvement and cleanup of nvme command handling (Christoph)

   - Add block SPDX tags (Christoph)

   - Cleanup/hardening of bio/bvec iteration (Christoph)

   - A few NVMe pull requests (Christoph)

   - Removal of CONFIG_LBDAF (Christoph)

   - Various little fixes here and there"

* tag 'for-5.2/block-20190507' of git://git.kernel.dk/linux-block: (164 commits)
  block: fix mismerge in bvec_advance
  block: don't drain in-progress dispatch in blk_cleanup_queue()
  blk-mq: move cancel of hctx->run_work into blk_mq_hw_sysfs_release
  blk-mq: always free hctx after request queue is freed
  blk-mq: split blk_mq_alloc_and_init_hctx into two parts
  blk-mq: free hw queue's resource in hctx's release handler
  blk-mq: move cancel of requeue_work into blk_mq_release
  blk-mq: grab .q_usage_counter when queuing request from plug code path
  block: fix function name in comment
  nvmet: protect discovery change log event list iteration
  nvme: mark nvme_core_init and nvme_core_exit static
  nvme: move command size checks to the core
  nvme-fabrics: check more command sizes
  nvme-pci: check more command sizes
  nvme-pci: remove an unneeded variable initialization
  nvme-pci: unquiesce admin queue on shutdown
  nvme-pci: shutdown on timeout during deletion
  nvme-pci: fix psdt field for single segment sgls
  nvme-multipath: don't print ANA group state by default
  nvme-multipath: split bios with the ns_head bio_set before submitting
  ...
2019-05-07 18:14:36 -07:00
Abhi Das f4686c26ec gfs2: read journal in large chunks
Use bios to read in the journal into the address space of the journal inode
(jd_inode), sequentially and in large chunks.  This is faster for locating the
journal head that the previous binary search approach.  When performing
recovery, we keep the journal in the address space until recovery is done,
which further speeds up things.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:15 +02:00
Andreas Gruenbacher d0a22a4b03 gfs2: Fix iomap write page reclaim deadlock
Since commit 64bc06bb32 ("gfs2: iomap buffered write support"), gfs2 is doing
buffered writes by starting a transaction in iomap_begin, writing a range of
pages, and ending that transaction in iomap_end.  This approach suffers from
two problems:

  (1) Any allocations necessary for the write are done in iomap_begin, so when
  the data aren't journaled, there is no need for keeping the transaction open
  until iomap_end.

  (2) Transactions keep the gfs2 log flush lock held.  When
  iomap_file_buffered_write calls balance_dirty_pages, this can end up calling
  gfs2_write_inode, which will try to flush the log.  This requires taking the
  log flush lock which is already held, resulting in a deadlock.

Fix both of these issues by not keeping transactions open from iomap_begin to
iomap_end.  Instead, start a small transaction in page_prepare and end it in
page_done when necessary.

Reported-by: Edwin Török <edvin.torok@citrix.com>
Fixes: 64bc06bb32 ("gfs2: iomap buffered write support")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
2019-05-07 23:39:15 +02:00
Abhi Das 8f91821990 gfs2: fix race between gfs2_freeze_func and unmount
As part of the freeze operation, gfs2_freeze_func() is left blocking
on a request to hold the sd_freeze_gl in SH. This glock is held in EX
by the gfs2_freeze() code.

A subsequent call to gfs2_unfreeze() releases the EXclusively held
sd_freeze_gl, which allows gfs2_freeze_func() to acquire it in SH and
resume its operation.

gfs2_unfreeze(), however, doesn't wait for gfs2_freeze_func() to complete.
If a umount is issued right after unfreeze, it could result in an
inconsistent filesystem because some journal data (statfs update) isn't
written out.

Refer to commit 24972557b1 for a more detailed explanation of how
freeze/unfreeze work.

This patch causes gfs2_unfreeze() to wait for gfs2_freeze_func() to
complete before returning to the user.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:14 +02:00
Andreas Gruenbacher fbb27873f2 gfs2: Rename gfs2_trans_{add_unrevoke => remove_revoke}
Rename gfs2_trans_add_unrevoke to gfs2_trans_remove_revoke: there is no
such thing as an "unrevoke" object; all this function does is remove
existing revoke objects plus some bookkeeping.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:14 +02:00
Andreas Gruenbacher a5b1d3fc50 gfs2: Rename sd_log_le_{revoke,ordered}
Rename sd_log_le_revoke to sd_log_revokes and sd_log_le_ordered to
sd_log_ordered: not sure what le stands for here, but it doesn't add
clarity, and if it stands for list entry, it's actually confusing as
those are both list heads but not list entries.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:14 +02:00
Andreas Gruenbacher 32ac43f6a4 gfs2: Remove unnecessary extern declarations
Make log operations statuc; they are only used locally.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:14 +02:00
Andreas Gruenbacher ce895cf15a gfs2: Remove misleading comments in gfs2_evict_inode
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:14 +02:00
Bob Peterson 73118ca8ba gfs2: Replace gl_revokes with a GLF flag
The gl_revokes value determines how many outstanding revokes a glock has
on the superblock revokes list; this is used to avoid unnecessary log
flushes.  However, gl_revokes is only ever tested for being zero, and it's
only decremented in revoke_lo_after_commit, which removes all revokes
from the list, so we know that the gl_revoke values of all the glocks on
the list will reach zero.  Therefore, we can replace gl_revokes with a
bit flag. This saves an atomic counter in struct gfs2_glock.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:14 +02:00
Andreas Gruenbacher 9287c6452d gfs2: Fix occasional glock use-after-free
This patch has to do with the life cycle of glocks and buffers.  When
gfs2 metadata or journaled data is queued to be written, a gfs2_bufdata
object is assigned to track the buffer, and that is queued to various
lists, including the glock's gl_ail_list to indicate it's on the active
items list.  Once the page associated with the buffer has been written,
it is removed from the ail list, but its life isn't over until a revoke
has been successfully written.

So after the block is written, its bufdata object is moved from the
glock's gl_ail_list to a file-system-wide list of pending revokes,
sd_log_le_revoke.  At that point the glock still needs to track how many
revokes it contributed to that list (in gl_revokes) so that things like
glock go_sync can ensure all the metadata has been not only written, but
also revoked before the glock is granted to a different node.  This is
to guarantee journal replay doesn't replay the block once the glock has
been granted to another node.

Ross Lagerwall recently discovered a race in which an inode could be
evicted, and its glock freed after its ail list had been synced, but
while it still had unwritten revokes on the sd_log_le_revoke list.  The
evict decremented the glock reference count to zero, which allowed the
glock to be freed.  After the revoke was written, function
revoke_lo_after_commit tried to adjust the glock's gl_revokes counter
and clear its GLF_LFLUSH flag, at which time it referenced the freed
glock.

This patch fixes the problem by incrementing the glock reference count
in gfs2_add_revoke when the glock's first bufdata object is moved from
the glock to the global revokes list. Later, when the glock's last such
bufdata object is freed, the reference count is decremented. This
guarantees that whichever process finishes last (the revoke writing or
the evict) will properly free the glock, and neither will reference the
glock after it has been freed.

Reported-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
2019-05-07 23:39:14 +02:00
Bob Peterson 7c70b89695 gfs2: clean_journal improperly set sd_log_flush_head
This patch fixes regressions in 588bff95c9.
Due to that patch, function clean_journal was setting the value of
sd_log_flush_head, but that's only valid if it is replaying the node's
own journal. If it's replaying another node's journal, that's completely
wrong and will lead to multiple problems. This patch tries to clean up
the mess by passing the value of the logical journal block number into
gfs2_write_log_header so the function can treat non-owned journals
generically. For the local journal, the journal extent map is used for
best performance. For other nodes from other journals, new function
gfs2_lblk_to_dblk is called to figure it out using gfs2_iomap_get.

This patch also tries to establish more consistency when passing journal
block parameters by changing several unsigned int types to a consistent
u32.

Fixes: 588bff95c9 ("GFS2: Reduce code redundancy writing log headers")
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 23:39:04 +02:00
Colin Ian King 91e1e547ab hostfs: fix mismatch between link_file definition and declaration
The function link_file declaration in the header file has the order
of the two arguments (from, to) swapped when compared to the definition
arguments of (to, from).  Fix this by swapping them around to match
the definition.

This error predates the git history, so no idea when this error
was introduced.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 23:18:28 +02:00
Linus Torvalds f678d6da74 Char/Misc patches for 5.2-rc1 - part 2
Here is the "real" big set of char/misc driver patches for 5.2-rc1
 
 Loads of different driver subsystem stuff in here, all over the places:
   - thunderbolt driver updates
   - habanalabs driver updates
   - nvmem driver updates
   - extcon driver updates
   - intel_th driver updates
   - mei driver updates
   - coresight driver updates
   - soundwire driver cleanups and updates
   - fastrpc driver updates
   - other minor driver updates
   - chardev minor fixups
 
 Feels like this tree is getting to be a dumping ground of "small driver
 subsystems" these days.  Which is fine with me, if it makes things
 easier for those subsystem maintainers.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.2-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc update part 2 from Greg KH:
 "Here is the "real" big set of char/misc driver patches for 5.2-rc1

  Loads of different driver subsystem stuff in here, all over the places:
   - thunderbolt driver updates
   - habanalabs driver updates
   - nvmem driver updates
   - extcon driver updates
   - intel_th driver updates
   - mei driver updates
   - coresight driver updates
   - soundwire driver cleanups and updates
   - fastrpc driver updates
   - other minor driver updates
   - chardev minor fixups

  Feels like this tree is getting to be a dumping ground of "small
  driver subsystems" these days. Which is fine with me, if it makes
  things easier for those subsystem maintainers.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.2-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (255 commits)
  intel_th: msu: Add current window tracking
  intel_th: msu: Add a sysfs attribute to trigger window switch
  intel_th: msu: Correct the block wrap detection
  intel_th: Add switch triggering support
  intel_th: gth: Factor out trace start/stop
  intel_th: msu: Factor out pipeline draining
  intel_th: msu: Switch over to scatterlist
  intel_th: msu: Replace open-coded list_{first,last,next}_entry variants
  intel_th: Only report useful IRQs to subdevices
  intel_th: msu: Start handling IRQs
  intel_th: pci: Use MSI interrupt signalling
  intel_th: Communicate IRQ via resource
  intel_th: Add "rtit" source device
  intel_th: Skip subdevices if their MMIO is missing
  intel_th: Rework resource passing between glue layers and core
  intel_th: SPDX-ify the documentation
  intel_th: msu: Fix single mode with IOMMU
  coresight: funnel: Support static funnel
  dt-bindings: arm: coresight: Unify funnel DT binding
  coresight: replicator: Add new device id for static replicator
  ...
2019-05-07 13:39:22 -07:00
Ross Lagerwall 7881ef3f33 gfs2: Fix lru_count going negative
Under certain conditions, lru_count may drop below zero resulting in
a large amount of log spam like this:

vmscan: shrink_slab: gfs2_dump_glock+0x3b0/0x630 [gfs2] \
    negative objects to delete nr=-1

This happens as follows:
1) A glock is moved from lru_list to the dispose list and lru_count is
   decremented.
2) The dispose function calls cond_resched() and drops the lru lock.
3) Another thread takes the lru lock and tries to add the same glock to
   lru_list, checking if the glock is on an lru list.
4) It is on a list (actually the dispose list) and so it avoids
   incrementing lru_count.
5) The glock is moved to lru_list.
5) The original thread doesn't dispose it because it has been re-added
   to the lru list but the lru_count has still decreased by one.

Fix by checking if the LRU flag is set on the glock rather than checking
if the glock is on some list and rearrange the code so that the LRU flag
is added/removed precisely when the glock is added/removed from lru_list.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 22:33:53 +02:00
Andreas Gruenbacher 71921ef859 gfs2: Fix loop in gfs2_rbm_find (v2)
Fix the resource group wrap-around logic in gfs2_rbm_find that commit
e579ed4f44 broke.  The bug can lead to unnecessary repeated scanning of the
same bitmaps; there is a risk that future changes will turn this into an
endless loop.

This is an updated version of commit 2d29f6b96d ("gfs2: Fix loop in
gfs2_rbm_find") which ended up being reverted because it introduced a
performance regression in iozone (see commit e74c98ca2d).  Changes since v1:

 - Simplify the wrap-around logic.

 - Handle the case where each resource group only has a single bitmap block
   (small filesystem).

 - Update rd_extfail_pt whenever we scan the entire bitmap, even when we don't
   start the scan at the very beginning of the bitmap.

Fixes: e579ed4f44 ("GFS2: Introduce rbm field bii")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2019-05-07 22:33:44 +02:00
Linus Torvalds cf482a49af Driver core/kobject patches for 5.2-rc1
Here is the "big" set of driver core patches for 5.2-rc1
 
 There are a number of ACPI patches in here as well, as Rafael said they
 should go through this tree due to the driver core changes they
 required.  They have all been acked by the ACPI developers.
 
 There are also a number of small subsystem-specific changes in here, due
 to some changes to the kobject core code.  Those too have all been acked
 by the various subsystem maintainers.
 
 As for content, it's pretty boring outside of the ACPI changes:
   - spdx cleanups
   - kobject documentation updates
   - default attribute groups for kobjects
   - other minor kobject/driver core fixes
 
 All have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core/kobject updates from Greg KH:
 "Here is the "big" set of driver core patches for 5.2-rc1

  There are a number of ACPI patches in here as well, as Rafael said
  they should go through this tree due to the driver core changes they
  required. They have all been acked by the ACPI developers.

  There are also a number of small subsystem-specific changes in here,
  due to some changes to the kobject core code. Those too have all been
  acked by the various subsystem maintainers.

  As for content, it's pretty boring outside of the ACPI changes:
   - spdx cleanups
   - kobject documentation updates
   - default attribute groups for kobjects
   - other minor kobject/driver core fixes

  All have been in linux-next for a while with no reported issues"

* tag 'driver-core-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (47 commits)
  kobject: clean up the kobject add documentation a bit more
  kobject: Fix kernel-doc comment first line
  kobject: Remove docstring reference to kset
  firmware_loader: Fix a typo ("syfs" -> "sysfs")
  kobject: fix dereference before null check on kobj
  Revert "driver core: platform: Fix the usage of platform device name(pdev->name)"
  init/config: Do not select BUILD_BIN2C for IKCONFIG
  Provide in-kernel headers to make extending kernel easier
  kobject: Improve doc clarity kobject_init_and_add()
  kobject: Improve docs for kobject_add/del
  driver core: platform: Fix the usage of platform device name(pdev->name)
  livepatch: Replace klp_ktype_patch's default_attrs with groups
  cpufreq: schedutil: Replace default_attrs field with groups
  padata: Replace padata_attr_type default_attrs field with groups
  irqdesc: Replace irq_kobj_type's default_attrs field with groups
  net-sysfs: Replace ktype default_attrs field with groups
  block: Replace all ktype default_attrs with groups
  samples/kobject: Replace foo_ktype's default_attrs field with groups
  kobject: Add support for default attribute groups to kobj_type
  driver core: Postpone DMA tear-down until after devres release for probe failure
  ...
2019-05-07 13:01:40 -07:00
Sascha Hauer a65d10f3ce ubifs: Drop unnecessary setting of zbr->znode
in dbg_walk_index ubifs_load_znode is used to load the znode behind
a zbranch. ubifs_load_znode links the new child znode to the zbranch,
so doing it again is unnecessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:32 +02:00
Sascha Hauer e3d73dead4 ubifs: Remove ifdefs around CONFIG_UBIFS_ATIME_SUPPORT
ifdefs reduce readability and compile coverage. This removes the ifdefs
around CONFIG_UBIFS_ATIME_SUPPORT by replacing them with IS_ENABLED()
where applicable. The fs layer would fall back to generic_update_time()
when .update_time doesn't exist. We do this fallback explicitly now.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:32 +02:00
Sascha Hauer eea2c05d92 ubifs: Remove #ifdef around CONFIG_FS_ENCRYPTION
ifdefs reduce readablity and compile coverage. This removes the ifdefs
around CONFIG_FS_ENCRYPTION by using IS_ENABLED and relying on static
inline wrappers. A new static inline wrapper for setting sb->s_cop is
introduced to allow filesystems to unconditionally compile in their
s_cop operations.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:31 +02:00
Richard Weinberger 9ca2d73264 ubifs: Limit number of xattrs per inode
Since we have to write one deletion inode per xattr
into the journal, limit the max number of xattrs.

In theory UBIFS supported up to 65535 xattrs per inode.
But this never worked correctly, expect no powercuts happened.
Now we support only as many xattrs as we can store in 50% of a
LEB.
Even for tiny flashes this allows dozens of xattrs per inode,
which is for an embedded filesystem still fine.

In case someone has existing inodes with much more xattrs, it is
still possible to delete them.
UBIFS will fall back to an non-atomic deletion mode.

Reported-by: Stefan Agner <stefan@agner.ch>
Fixes: 1e51764a3c ("UBIFS: add new flash file system")
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:31 +02:00
Richard Weinberger 988bec4131 ubifs: orphan: Handle xattrs like files
Like for the journal case, make sure that we track all xattr
inodes.
Otherwise UBIFS might not be able to locate stale xattr inodes
upon recovery.

Reported-by: Stefan Agner <stefan@agner.ch>
Fixes: 1e51764a3c ("UBIFS: add new flash file system")
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:30 +02:00
Richard Weinberger 7959cf3a75 ubifs: journal: Handle xattrs like files
If an inode hosts xattrs, create deletion entries for each
inode. That way we can make sure that upon journal replay UBIFS
can find find all xattr inodes.
Otherwise it can happen that GC consumed already a LEB which contained
parts of the TNC that pointed to the xattrs and we no longer
find all xattr inodes, which will confuse the LPT and cause
space allocation issues.

Reported-by: Stefan Agner <stefan@agner.ch>
Fixes: 1e51764a3c ("UBIFS: add new flash file system")
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:30 +02:00
Andrey Abramov 257bb92420 ubifs: find.c: replace swap function with built-in one
Replace swap_dirty_idx function with built-in one,
because swap_dirty_idx does only a simple byte to byte swap.

Since Spectre mitigations have made indirect function calls more
expensive, and the default simple byte copies swap is implemented
without them, an "optimized" custom swap function is now
a waste of time as well as code.

Signed-off-by: Andrey Abramov <st5pub@yandex.ru>
Reviewed by: George Spelvin <lkml@sdf.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:29 +02:00
Sascha Hauer e9cd7dfd7e ubifs: Do not skip hash checking in data nodes
UBIFS bails out early from try_read_node() when it doesn't have to check
the CRC. Still the node hash has to be checked, otherwise wrong data
could be sneaked into the FS. Fix this by not bailing out early and
always checking the node hash.

Fixes: 16a26b20d2 ("ubifs: authentication: Add hashes to index nodes")
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:23 +02:00
Linus Torvalds b4b52b881c Wimplicit-fallthrough patches for 5.2-rc1
Hi Linus,
 
 This is my very first pull-request.  I've been working full-time as
 a kernel developer for more than two years now. During this time I've
 been fixing bugs reported by Coverity all over the tree and, as part
 of my work, I'm also contributing to the KSPP. My work in the kernel
 community has been supervised by Greg KH and Kees Cook.
 
 OK. So, after the quick introduction above, please, pull the following
 patches that mark switch cases where we are expecting to fall through.
 These patches are part of the ongoing efforts to enable -Wimplicit-fallthrough.
 They have been ignored for a long time (most of them more than 3 months,
 even after pinging multiple times), which is the reason why I've created
 this tree. Most of them have been baking in linux-next for a whole development
 cycle. And with Stephen Rothwell's help, we've had linux-next nag-emails
 going out for newly introduced code that triggers -Wimplicit-fallthrough
 to avoid gaining more of these cases while we work to remove the ones
 that are already present.
 
 I'm happy to let you know that we are getting close to completing this
 work.  Currently, there are only 32 of 2311 of these cases left to be
 addressed in linux-next.  I'm auditing every case; I take a look into
 the code and analyze it in order to determine if I'm dealing with an
 actual bug or a false positive, as explained here:
 
 https://lore.kernel.org/lkml/c2fad584-1705-a5f2-d63c-824e9b96cf50@embeddedor.com/
 
 While working on this, I've found and fixed the following missing
 break/return bugs, some of them introduced more than 5 years ago:
 
 84242b82d8
 7850b51b6c
 5e420fe635
 09186e5034
 b5be853181
 7264235ee7
 cc5034a5d2
 479826cc86
 5340f23df8
 df997abeeb
 2f10d82373
 307b00c5e6
 5d25ff7a54
 a7ed5b3e7d
 c24bfa8f21
 ad0eaee619
 9ba8376ce1
 dc586a60a1
 a8e9b186f1
 4e57562b48
 60747828ea
 c5b974bee9
 cc44ba9116
 2c930e3d0a
 
 Once this work is finish, we'll be able to universally enable
 "-Wimplicit-fallthrough" to avoid any of these kinds of bugs from
 entering the kernel again.
 
 Thanks
 
 Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
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Merge tag 'Wimplicit-fallthrough-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux

Pull Wimplicit-fallthrough updates from Gustavo A. R. Silva:
 "Mark switch cases where we are expecting to fall through.

  This is part of the ongoing efforts to enable -Wimplicit-fallthrough.

  Most of them have been baking in linux-next for a whole development
  cycle. And with Stephen Rothwell's help, we've had linux-next
  nag-emails going out for newly introduced code that triggers
  -Wimplicit-fallthrough to avoid gaining more of these cases while we
  work to remove the ones that are already present.

  We are getting close to completing this work. Currently, there are
  only 32 of 2311 of these cases left to be addressed in linux-next. I'm
  auditing every case; I take a look into the code and analyze it in
  order to determine if I'm dealing with an actual bug or a false
  positive, as explained here:

      https://lore.kernel.org/lkml/c2fad584-1705-a5f2-d63c-824e9b96cf50@embeddedor.com/

  While working on this, I've found and fixed the several missing
  break/return bugs, some of them introduced more than 5 years ago.

  Once this work is finished, we'll be able to universally enable
  "-Wimplicit-fallthrough" to avoid any of these kinds of bugs from
  entering the kernel again"

* tag 'Wimplicit-fallthrough-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: (27 commits)
  memstick: mark expected switch fall-throughs
  drm/nouveau/nvkm: mark expected switch fall-throughs
  NFC: st21nfca: Fix fall-through warnings
  NFC: pn533: mark expected switch fall-throughs
  block: Mark expected switch fall-throughs
  ASN.1: mark expected switch fall-through
  lib/cmdline.c: mark expected switch fall-throughs
  lib: zstd: Mark expected switch fall-throughs
  scsi: sym53c8xx_2: sym_nvram: Mark expected switch fall-through
  scsi: sym53c8xx_2: sym_hipd: mark expected switch fall-throughs
  scsi: ppa: mark expected switch fall-through
  scsi: osst: mark expected switch fall-throughs
  scsi: lpfc: lpfc_scsi: Mark expected switch fall-throughs
  scsi: lpfc: lpfc_nvme: Mark expected switch fall-through
  scsi: lpfc: lpfc_nportdisc: Mark expected switch fall-through
  scsi: lpfc: lpfc_hbadisc: Mark expected switch fall-throughs
  scsi: lpfc: lpfc_els: Mark expected switch fall-throughs
  scsi: lpfc: lpfc_ct: Mark expected switch fall-throughs
  scsi: imm: mark expected switch fall-throughs
  scsi: csiostor: csio_wr: mark expected switch fall-through
  ...
2019-05-07 12:48:10 -07:00
Arnd Bergmann f4844b35d6 ubifs: work around high stack usage with clang
Building this file with clang can result in large stack usage as seen from
this warning:

fs/ubifs/auth.c:78:5: error: stack frame size of 1152 bytes in function 'ubifs_prepare_auth_node'

The problem is that inlining ubifs_hash_calc_hmac() leads to
two SHASH_DESC_ON_STACK() blocks in the same function, and clang
for some reason does not reuse the stack space as it should.

Putting the first declaration into a separate basic block avoids
this problem and reduces the stack allocation to 640 bytes.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:36:39 +02:00
YueHaibing fb9a5a3edb ubifs: remove unused function __ubifs_shash_final
There is no callers in tree, and can be removed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:36:39 +02:00
Eric Biggers cf3949670f ubifs: remove unnecessary #ifdef around fscrypt_ioctl_get_policy()
When !CONFIG_FS_ENCRYPTION, fscrypt_ioctl_get_policy() is already
stubbed out to return -EOPNOTSUPP, so the extra #ifdef is not needed.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:36:39 +02:00
Eric Biggers c64cda8a99 ubifs: remove unnecessary calls to set up directory key
In ubifs_unlink() and ubifs_rmdir(), remove the call to
fscrypt_get_encryption_info() that precedes fscrypt_setup_filename().
This call was unnecessary, because fscrypt_setup_filename() already
tries to set up the directory's encryption key.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:36:39 +02:00
Linus Torvalds eac7078a0f pidfd patches for v5.2-rc1
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Merge tag 'pidfd-v5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

Pull pidfd updates from Christian Brauner:
 "This patchset makes it possible to retrieve pidfds at process creation
  time by introducing the new flag CLONE_PIDFD to the clone() system
  call. Linus originally suggested to implement this as a new flag to
  clone() instead of making it a separate system call.

  After a thorough review from Oleg CLONE_PIDFD returns pidfds in the
  parent_tidptr argument. This means we can give back the associated pid
  and the pidfd at the same time. Access to process metadata information
  thus becomes rather trivial.

  As has been agreed, CLONE_PIDFD creates file descriptors based on
  anonymous inodes similar to the new mount api. They are made
  unconditional by this patchset as they are now needed by core kernel
  code (vfs, pidfd) even more than they already were before (timerfd,
  signalfd, io_uring, epoll etc.). The core patchset is rather small.
  The bulky looking changelist is caused by David's very simple changes
  to Kconfig to make anon inodes unconditional.

  A pidfd comes with additional information in fdinfo if the kernel
  supports procfs. The fdinfo file contains the pid of the process in
  the callers pid namespace in the same format as the procfs status
  file, i.e. "Pid:\t%d".

  To remove worries about missing metadata access this patchset comes
  with a sample/test program that illustrates how a combination of
  CLONE_PIDFD and pidfd_send_signal() can be used to gain race-free
  access to process metadata through /proc/<pid>.

  Further work based on this patchset has been done by Joel. His work
  makes pidfds pollable. It finished too late for this merge window. I
  would prefer to have it sitting in linux-next for a while and send it
  for inclusion during the 5.3 merge window"

* tag 'pidfd-v5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  samples: show race-free pidfd metadata access
  signal: support CLONE_PIDFD with pidfd_send_signal
  clone: add CLONE_PIDFD
  Make anon_inodes unconditional
2019-05-07 12:30:24 -07:00
Linus Torvalds 41bc10cabe stream_open related patches for Linux 5.2
https://lore.kernel.org/linux-fsdevel/CAHk-=wg1tFzcaX2v9Z91vPJiBR486ddW5MtgDL02-fOen2F0Aw@mail.gmail.com/T/#m5b2d9ad3aeacea4bd6aa1964468ac074bf3aa5bf
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Merge tag 'stream_open-5.2' of https://lab.nexedi.com/kirr/linux

Pull stream_open conversion from Kirill Smelkov:

 - remove unnecessary double nonseekable_open from drivers/char/dtlk.c
   as noticed by Pavel Machek while reviewing nonseekable_open ->
   stream_open mass conversion.

 - the mass conversion patch promised in commit 10dce8af34 ("fs:
   stream_open - opener for stream-like files so that read and write can
   run simultaneously without deadlock") and is automatically generated
   by running

        $ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/stream_open.cocci

   I've verified each generated change manually - that it is correct to
   convert - and each other nonseekable_open instance left - that it is
   either not correct to convert there, or that it is not converted due
   to current stream_open.cocci limitations. More details on this in the
   patch.

 - finally, change VFS to pass ppos=NULL into .read/.write for files
   that declare themselves streams. It was suggested by Rasmus Villemoes
   and makes sure that if ppos starts to be erroneously used in a stream
   file, such bug won't go unnoticed and will produce an oops instead of
   creating illusion of position change being taken into account.

   Note: this patch does not conflict with "fuse: Add FOPEN_STREAM to
   use stream_open()" that will be hopefully coming via FUSE tree,
   because fs/fuse/ uses new-style .read_iter/.write_iter, and for these
   accessors position is still passed as non-pointer kiocb.ki_pos .

* tag 'stream_open-5.2' of https://lab.nexedi.com/kirr/linux:
  vfs: pass ppos=NULL to .read()/.write() of FMODE_STREAM files
  *: convert stream-like files from nonseekable_open -> stream_open
  dtlk: remove double call to nonseekable_open
2019-05-07 12:15:13 -07:00
Linus Torvalds aa26690fab Changes for Linux 5.2:
- Fix some more buffer deadlocks when performing an unmount after a hard
   shutdown.
 - Fix some minor space accounting issues.
 - Fix some use after free problems.
 - Make the (undocumented) FITRIM behavior consistent with other filesystems.
 - Embiggen the xfs geometry ioctl's data structure.
 - Introduce a new AG geometry ioctl.
 - Introduce a new online health reporting infrastructure and ioctl for
   userspace to query a filesystem's health status.
 - Enhance online scrub and repair to update the health reports.
 - Reduce thundering herd problems when writeback io completes.
 - Fix some transaction reservation type errors.
 - Fix integer overflow problems with delayed alloc reservation counters.
 - Fix some problems where we would exit to userspace without unlocking.
 - Fix inconsistent behavior when finishing deferred ops fails.
 - Strengthen scrub to check incore data against ondisk metadata.
 - Remove long-broken mntpt mount option.
 - Add an online scrub function for the filesystem summary counters,
   which should make online metadata scrub more or less feature complete
   for now.
 - Various cleanups.
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Merge tag 'xfs-5.2-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Darrick Wong:
 "Here's a big pile of new stuff for XFS for 5.2. XFS has grown the
  ability to report metadata health status to userspace after online
  fsck checks the filesystem. The online metadata checking code is (I
  really hope) feature complete with the addition of checks for the
  global fs counters, though it'll remain EXPERIMENTAL for now.

  There are also fixes for thundering herds of writeback completions and
  some other deadlocks, fixes for theoretical integer overflow attacks
  on space accounting, and removal of the long-defunct 'mntpt' option
  which was deprecated in the mid-2000s and (it turns out) totally
  broken since 2011 (and nobody complained...).

  Summary:

   - Fix some more buffer deadlocks when performing an unmount after a
     hard shutdown.

   - Fix some minor space accounting issues.

   - Fix some use after free problems.

   - Make the (undocumented) FITRIM behavior consistent with other
     filesystems.

   - Embiggen the xfs geometry ioctl's data structure.

   - Introduce a new AG geometry ioctl.

   - Introduce a new online health reporting infrastructure and ioctl
     for userspace to query a filesystem's health status.

   - Enhance online scrub and repair to update the health reports.

   - Reduce thundering herd problems when writeback io completes.

   - Fix some transaction reservation type errors.

   - Fix integer overflow problems with delayed alloc reservation
     counters.

   - Fix some problems where we would exit to userspace without
     unlocking.

   - Fix inconsistent behavior when finishing deferred ops fails.

   - Strengthen scrub to check incore data against ondisk metadata.

   - Remove long-broken mntpt mount option.

   - Add an online scrub function for the filesystem summary counters,
     which should make online metadata scrub more or less feature
     complete for now.

   - Various cleanups"

* tag 'xfs-5.2-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (38 commits)
  xfs: change some error-less functions to void types
  xfs: add online scrub for superblock counters
  xfs: don't parse the mtpt mount option
  xfs: always rejoin held resources during defer roll
  xfs: add missing error check in xfs_prepare_shift()
  xfs: scrub should check incore counters against ondisk headers
  xfs: allow scrubbers to pause background reclaim
  xfs: rename the speculative block allocation reclaim toggle functions
  xfs: track delayed allocation reservations across the filesystem
  xfs: fix broken bhold behavior in xrep_roll_ag_trans
  xfs: unlock inode when xfs_ioctl_setattr_get_trans can't get transaction
  xfs: kill the xfs_dqtrx_t typedef
  xfs: widen inode delalloc block counter to 64-bits
  xfs: widen quota block counters to 64-bit integers
  xfs: abort unaligned nowait directio early
  xfs: assert that we don't enter agfl freeing with a non-permanent transaction
  xfs: make tr_growdata a permanent transaction
  xfs: merge adjacent io completions of the same type
  xfs: remove unused m_data_workqueue
  xfs: implement per-inode writeback completion queues
  ...
2019-05-07 11:46:56 -07:00
Linus Torvalds d8456eaf31 Changes for Linux 5.2:
- Add some extra hooks to the iomap buffered write path to enable gfs2
   journalled writes.
 - SPDX conversion
 - Various refactoring.
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Merge tag 'iomap-5.2-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull iomap updates from Darrick Wong:
 "Nothing particularly exciting here, just adding some callouts for gfs2
  and cleaning a few things.

  Summary:

   - Add some extra hooks to the iomap buffered write path to enable
     gfs2 journalled writes

   - SPDX conversion

   - Various refactoring"

* tag 'iomap-5.2-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  iomap: move iomap_read_inline_data around
  iomap: Add a page_prepare callback
  iomap: Fix use-after-free error in page_done callback
  fs: Turn __generic_write_end into a void function
  iomap: Clean up __generic_write_end calling
  iomap: convert to SPDX identifier
2019-05-07 11:43:32 -07:00
Linus Torvalds b8cac3cd24 Several minor jfs fixes
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Merge tag 'jfs-5.2' of git://github.com/kleikamp/linux-shaggy

Pull jfs updates from Dave Kleikamp:
 "Several minor jfs fixes"

* tag 'jfs-5.2' of git://github.com/kleikamp/linux-shaggy:
  jfs: fix bogus variable self-initialization
  fs/jfs: Switch to use new generic UUID API
  jfs: compare old and new mode before setting update_mode flag
  jfs: remove incorrect comment in jfs_superblock
  jfs: fix spelling mistake, EACCESS -> EACCES
2019-05-07 11:37:27 -07:00
Linus Torvalds 9f2e3a53f7 for-5.2-tag
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Merge tag 'for-5.2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "This time the majority of changes are cleanups, though there's still a
  number of changes of user interest.

  User visible changes:

   - better read time and write checks to catch errors early and before
     writing data to disk (to catch potential memory corruption on data
     that get checksummed)

   - qgroups + metadata relocation: last speed up patch int the series
     to address the slowness, there should be no overhead comparing
     balance with and without qgroups

   - FIEMAP ioctl does not start a transaction unnecessarily, this can
     result in a speed up and less blocking due to IO

   - LOGICAL_INO (v1, v2) does not start transaction unnecessarily, this
     can speed up the mentioned ioctl and scrub as well

   - fsync on files with many (but not too many) hardlinks is faster,
     finer decision if the links should be fsynced individually or
     completely

   - send tries harder to find ranges to clone

   - trim/discard will skip unallocated chunks that haven't been touched
     since the last mount

  Fixes:

   - send flushes delayed allocation before start, otherwise it could
     miss some changes in case of a very recent rw->ro switch of a
     subvolume

   - fix fallocate with qgroups that could lead to space accounting
     underflow, reported as a warning

   - trim/discard ioctl honours the requested range

   - starting send and dedupe on a subvolume at the same time will let
     only one of them succeed, this is to prevent changes that send
     could miss due to dedupe; both operations are restartable

  Core changes:

   - more tree-checker validations, errors reported by fuzzing tools:
      - device item
      - inode item
      - block group profiles

   - tracepoints for extent buffer locking

   - async cow preallocates memory to avoid errors happening too deep in
     the call chain

   - metadata reservations for delalloc reworked to better adapt in
     many-writers/low-space scenarios

   - improved space flushing logic for intense DIO vs buffered workloads

   - lots of cleanups
      - removed unused struct members
      - redundant argument removal
      - properties and xattrs
      - extent buffer locking
      - selftests
      - use common file type conversions
      - many-argument functions reduction"

* tag 'for-5.2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (227 commits)
  btrfs: Use kvmalloc for allocating compressed path context
  btrfs: Factor out common extent locking code in submit_compressed_extents
  btrfs: Set io_tree only once in submit_compressed_extents
  btrfs: Replace clear_extent_bit with unlock_extent
  btrfs: Make compress_file_range take only struct async_chunk
  btrfs: Remove fs_info from struct async_chunk
  btrfs: Rename async_cow to async_chunk
  btrfs: Preallocate chunks in cow_file_range_async
  btrfs: reserve delalloc metadata differently
  btrfs: track DIO bytes in flight
  btrfs: merge calls of btrfs_setxattr and btrfs_setxattr_trans in btrfs_set_prop
  btrfs: delete unused function btrfs_set_prop_trans
  btrfs: start transaction in xattr_handler_set_prop
  btrfs: drop local copy of inode i_mode
  btrfs: drop old_fsflags in btrfs_ioctl_setflags
  btrfs: modify local copy of btrfs_inode flags
  btrfs: drop useless inode i_flags copy and restore
  btrfs: start transaction in btrfs_ioctl_setflags()
  btrfs: export btrfs_set_prop
  btrfs: refactor btrfs_set_props to validate externally
  ...
2019-05-07 11:34:19 -07:00
Linus Torvalds 78438ce18f Merge branch 'stable-fodder' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs stable fodder fixes from Al Viro:

 - acct_on() fix for deadlock caught by overlayfs folks

 - autofs RCU use-after-free SNAFU (->d_manage() can be called
   locklessly, so we need to RCU-delay freeing the objects it looks at)

 - (hopefully) the end of "do we need freeing this dentry RCU-delayed"
   whack-a-mole.

* 'stable-fodder' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  autofs: fix use-after-free in lockless ->d_manage()
  dcache: sort the freeing-without-RCU-delay mess for good.
  acct_on(): don't mess with freeze protection
2019-05-07 11:17:26 -07:00
Linus Torvalds 168e153d5e Merge branch 'work.icache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs inode freeing updates from Al Viro:
 "Introduction of separate method for RCU-delayed part of
  ->destroy_inode() (if any).

  Pretty much as posted, except that destroy_inode() stashes
  ->free_inode into the victim (anon-unioned with ->i_fops) before
  scheduling i_callback() and the last two patches (sockfs conversion
  and folding struct socket_wq into struct socket) are excluded - that
  pair should go through netdev once davem reopens his tree"

* 'work.icache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (58 commits)
  orangefs: make use of ->free_inode()
  shmem: make use of ->free_inode()
  hugetlb: make use of ->free_inode()
  overlayfs: make use of ->free_inode()
  jfs: switch to ->free_inode()
  fuse: switch to ->free_inode()
  ext4: make use of ->free_inode()
  ecryptfs: make use of ->free_inode()
  ceph: use ->free_inode()
  btrfs: use ->free_inode()
  afs: switch to use of ->free_inode()
  dax: make use of ->free_inode()
  ntfs: switch to ->free_inode()
  securityfs: switch to ->free_inode()
  apparmor: switch to ->free_inode()
  rpcpipe: switch to ->free_inode()
  bpf: switch to ->free_inode()
  mqueue: switch to ->free_inode()
  ufs: switch to ->free_inode()
  coda: switch to ->free_inode()
  ...
2019-05-07 10:57:05 -07:00
Jeff Layton 00abf69dd2 ceph: flush dirty inodes before proceeding with remount
xfstest generic/452 was triggering a "Busy inodes after umount" warning.
ceph was allowing the mount to go read-only without first flushing out
dirty inodes in the cache. Ensure we sync out the filesystem before
allowing a remount to proceed.

Cc: stable@vger.kernel.org
Link: http://tracker.ceph.com/issues/39571
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:43:05 +02:00
Jeff Layton 4198aba4f4 ceph: fix unaligned access in ceph_send_cap_releases
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:43:05 +02:00
Jeff Layton b726ec972c libceph: make ceph_pr_addr take an struct ceph_entity_addr pointer
GCC9 is throwing a lot of warnings about unaligned accesses by
callers of ceph_pr_addr. All of the current callers are passing a
pointer to the sockaddr inside struct ceph_entity_addr.

Fix it to take a pointer to a struct ceph_entity_addr instead,
and then have the function make a copy of the sockaddr before
printing it.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:43:05 +02:00
Jeff Layton 5ddc61fc14 ceph: print inode number in __caps_issued_mask debugging messages
To make it easier to correlate with MDS logs.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:38 +02:00
Jeff Layton 488f5284e2 ceph: just call get_session in __ceph_lookup_mds_session
I originally thought there was a potential race here, but the fact
that this is called with the mdsc->mutex held, ensures that the
last reference to the session can't be put here.

Still, it's clearer to just return the value from get_session here,
and may prevent a bug later if we ever rework this code to be less
reliant on mutexes.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:38 +02:00
Jeff Layton 1199d7da2d ceph: simplify arguments and return semantics of try_get_cap_refs
The return of this function is rather complex. It can return 0 or 1,
and in the case of a 1 return, the "err" pointer will be filled out.
This necessitates a lot of copying of values.

We can achieve the same effect by just returning 0, 1 or a negative
error code, and drop the "err" argument from this function.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:38 +02:00
Jeff Layton a452bc0636 ceph: fix comment over ceph_drop_caps_for_unlink
It's not clear what AUTH_RDCACHE means in this context, and we're
clearly just dropping LINK caps here.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:38 +02:00
Jeff Layton 8340f22ce5 ceph: move wait for mds request into helper function
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:38 +02:00
Jeff Layton 86bda539fa ceph: have ceph_mdsc_do_request call ceph_mdsc_submit_request
Nothing calls ceph_mdsc_submit_request today, but in later patches we'll
need to be able to call this separately.

Have the helper return an int so we can check the r_err under the mutex,
and have the caller just check the error code from the submit. Also move
the acquisition of CEPH_CAP_PIN references into the same function.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton 111c708104 ceph: after an MDS request, do callback and completions
No MDS requests use r_callback today, but that will change in the
future. The OSD client always does r_callback and then completes
r_completion. Let's have the MDS client do the same.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton c1dfc27723 ceph: use pathlen values returned by set_request_path_attr
We make copies of the dentry name in set_request_path_attr, but then
create_request_message re-fetches the lengths out of the dentry. While
we don't currently set the *_drop fields unless the parents are locked,
it's still better not to rely on that sort of implicit assumption.

Use the pathlen values that set_request_path_attr returned instead, as
they will always be correct for the returned paths themselves.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton f77f21bb28 ceph: use __getname/__putname in ceph_mdsc_build_path
Al suggested we get rid of the kmalloc here and just use __getname
and __putname to get a full PATH_MAX pathname buffer.

Since we build the path in reverse, we continue to return a pointer
to the beginning of the string and the length, and add a new helper
to free the thing at the end.

Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton 964fff7491 ceph: use ceph_mdsc_build_path instead of clone_dentry_name
While it may be slightly more efficient, it's probably not worthwhile to
optimize for the case that clone_dentry_name handles. We can get the
same result by just calling ceph_mdsc_build_path when the parent isn't
locked, with less code duplication.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton 69a10fb3f4 ceph: fix potential use-after-free in ceph_mdsc_build_path
temp is not defined outside of the RCU critical section here. Ensure
we grab that value before we drop the rcu_read_lock.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton ff4a80bf2d ceph: dump granular cap info in "caps" debugfs file
We have a "caps" file already that gives statistics on the caps
cache as a whole. Add another section to that output and dump a
line for each individual cap record.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton f5d7726900 ceph: make iterate_session_caps a public symbol
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton 40e7e2c0e8 ceph: fix NULL pointer deref when debugging is enabled
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton 428bb68ad9 ceph: properly handle granular statx requests
cephfs can benefit from statx. We can have the client just request caps
sufficient for the needed attributes and leave off the rest.

Also, recognize when AT_STATX_DONT_SYNC is set, and just scrape the
inode without doing any call in that case. Force a call to the MDS in
the event that AT_STATX_FORCE_SYNC is set.

Link: http://tracker.ceph.com/issues/39258
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Jeff Layton ffb61c55b2 ceph: remove superfluous inode_lock in ceph_fsync
Originally, filemap_write_and_wait took the i_mutex internally, but
commit 02c24a8218 pushed the mutex acquisition into the individual
fsync routines, leaving it up to the subsystem maintainers to remove
it if it wasn't needed.

For ceph, I see no reason to take the inode_lock here. All of the
operations inside that lock are protected by their own locking.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:37 +02:00
Yan, Zheng 570df4e9c2 ceph: snapshot nfs re-export
To support snapshot nfs re-export, we need a way to lookup snapped
inode by file handle. For directory inode, snapped metadata are always
stored together with head inode. Client just need to pass vinodeno_t
to MDS. For non-directory inode, there can be multiple version of
snapped inodes and they can be stored in different dirfrags. Besides
vinodeno_t, client also need to tell mds from which dirfrag it got the
snapped inode.

Another problem of supporting snapshot nfs re-export is that there
can be multiple paths to access a snapped inode. For example:

  mkdir -p d1/d2/d3
  mkdir d1/.snap/s1

Paths 'd1/.snap/s1/d2/d3', 'd1/d2/.snap/_s1_<inode number of d1>/d3'
and 'd1/d2/d3/.snap/_s1_<inode number of d1>' are all reference to the
same snapped inode. For a given snapped inode, There is no convenient
way to get the first form and the second form paths. For simplicity,
ceph_get_parent() return snapdir for snapped directory inode.

Furthermore, client may access snapshot of deleted directory. For
example:

  mkdir -p d1/d2
  mkdir d1/.snap/s1
  open d1/.snap/s1/d2
  rm -rf d1/d2
  <nfs server restart>

The path constucted by ceph_get_parent() and ceph_get_name() is
'<inode of d2>/.snap/_s1_<inode number of d1>'. Futher lookup parent
of <inode of d2> will fail. To workaround this case, this patch uses
d_obtain_root() to get dentry for snapdir of deleted directory.
snapdir dentry has no DCACHE_DISCONNECTED flag set, reconnect_path()
stops when it reaches snapdir dentry.

Link: http://tracker.ceph.com/issues/22105
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:36 +02:00
Luis Henriques 0c44a8e0fc ceph: quota: fix quota subdir mounts
The CephFS kernel client does not enforce quotas set in a directory that
isn't visible from the mount point.  For example, given the path
'/dir1/dir2', if quotas are set in 'dir1' and the filesystem is mounted with

  mount -t ceph <server>:<port>:/dir1/ /mnt

then the client won't be able to access 'dir1' inode, even if 'dir2' belongs
to a quota realm that points to it.

This patch fixes this issue by simply doing an MDS LOOKUPINO operation for
unknown inodes.  Any inode reference obtained this way will be added to a
list in ceph_mds_client, and will only be released when the filesystem is
umounted.

Link: https://tracker.ceph.com/issues/38482
Reported-by: Hendrik Peyerl <hpeyerl@plusline.net>
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:36 +02:00
Luis Henriques 3886274adf ceph: factor out ceph_lookup_inode()
This function will be used by __fh_to_dentry and by the quotas code, to
find quota realm inodes that are not visible in the mountpoint.

Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:36 +02:00
Zhi Zhang 1b52931ca9 ceph: remove duplicated filelock ref increase
Inode i_filelock_ref is increased in ceph_lock or ceph_flock, but it is
increased again in ceph_lock_message. This results in this ref won't
become zero. If CEPH_I_ERROR_FILELOCK flag is set in
remove_session_caps once, this flag can't be cleared even if client is
back to normal. So further file lock will return EIO.

Signed-off-by: Zhi Zhang <zhang.david2011@gmail.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-07 19:22:36 +02:00
Linus Torvalds 0968621917 Printk changes for 5.2
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Merge tag 'printk-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk

Pull printk updates from Petr Mladek:

 - Allow state reset of printk_once() calls.

 - Prevent crashes when dereferencing invalid pointers in vsprintf().
   Only the first byte is checked for simplicity.

 - Make vsprintf warnings consistent and inlined.

 - Treewide conversion of obsolete %pf, %pF to %ps, %pF printf
   modifiers.

 - Some clean up of vsprintf and test_printf code.

* tag 'printk-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
  lib/vsprintf: Make function pointer_string static
  vsprintf: Limit the length of inlined error messages
  vsprintf: Avoid confusion between invalid address and value
  vsprintf: Prevent crash when dereferencing invalid pointers
  vsprintf: Consolidate handling of unknown pointer specifiers
  vsprintf: Factor out %pO handler as kobject_string()
  vsprintf: Factor out %pV handler as va_format()
  vsprintf: Factor out %p[iI] handler as ip_addr_string()
  vsprintf: Do not check address of well-known strings
  vsprintf: Consistent %pK handling for kptr_restrict == 0
  vsprintf: Shuffle restricted_pointer()
  printk: Tie printk_once / printk_deferred_once into .data.once for reset
  treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively
  lib/test_printf: Switch to bitmap_zalloc()
2019-05-07 09:18:12 -07:00
David Howells f5e4546347 afs: Implement YFS ACL setting
Implement the setting of YFS ACLs in AFS through the interface of setting
the afs.yfs.acl extended attribute on the file.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
David Howells ae46578b96 afs: Get YFS ACLs and information through xattrs
The YFS/AuriStor variant of AFS provides more capable ACLs and provides
per-volume ACLs and per-file ACLs as well as per-directory ACLs.  It also
provides some extra information that can be retrieved through four ACLs:

 (1) afs.yfs.acl

     The YFS file ACL (not the same format as afs.acl).

 (2) afs.yfs.vol_acl

     The YFS volume ACL.

 (3) afs.yfs.acl_inherited

     "1" if a file's ACL is inherited from its parent directory, "0"
     otherwise.

 (4) afs.yfs.acl_num_cleaned

     The number of of ACEs removed from the ACL by the server because the
     PT entries were removed from the PTS database (ie. the subject is no
     longer known).

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
Joe Gorse b10494af49 afs: implement acl setting
Implements the setting of ACLs in AFS by means of setting the
afs.acl extended attribute on the file.

Signed-off-by: Joe Gorse <jhgorse@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
David Howells 260f082bae afs: Get an AFS3 ACL as an xattr
Implement an xattr on AFS files called "afs.acl" that retrieves a file's
ACL.  It returns the raw AFS3 ACL from the result of calling FS.FetchACL,
leaving any interpretation to userspace.

Note that whilst YFS servers will respond to FS.FetchACL, this will render
a more-advanced YFS ACL down.  Use "afs.yfs.acl" instead for that.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
David Howells a2f611a3dc afs: Fix getting the afs.fid xattr
The AFS3 FID is three 32-bit unsigned numbers and is represented as three
up-to-8-hex-digit numbers separated by colons to the afs.fid xattr.
However, with the advent of support for YFS, the FID is now a 64-bit volume
number, a 96-bit vnode/inode number and a 32-bit uniquifier (as before).
Whilst the sprintf in afs_xattr_get_fid() has been partially updated (it
currently ignores the upper 32 bits of the 96-bit vnode number), the size
of the stack-based buffer has not been increased to match, thereby allowing
stack corruption to occur.

Fix this by increasing the buffer size appropriately and conditionally
including the upper part of the vnode number if it is non-zero.  The latter
requires the lower part to be zero-padded if the upper part is non-zero.

Fixes: 3b6492df41 ("afs: Increase to 64-bit volume ID and 96-bit vnode ID for YFS")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
David Howells c73aa4102f afs: Fix the afs.cell and afs.volume xattr handlers
Fix the ->get handlers for the afs.cell and afs.volume xattrs to pass the
source data size to memcpy() rather than target buffer size.

Overcopying the source data occasionally causes the kernel to oops.

Fixes: d3e3b7eac8 ("afs: Add metadata xattrs")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
Marc Dionne c0abbb5791 afs: Calculate i_blocks based on file size
While it's not possible to give an accurate number for the blocks
used on the server, populate i_blocks based on the file size so
that 'du' can give a reasonable estimate.

The value is rounded up to 1K granularity, for consistency with
what other AFS clients report, and the servers' 1K usage quota
unit.  Note that the value calculated by 'du' at the root of a
volume can still be slightly lower than the quota usage on the
server, as 0-length files are charged 1 quota block, but are
reported as occupying 0 blocks.  Again, this is consistent with
other AFS clients.

Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
David Howells b134d687dd afs: Log more information for "kAFS: AFS vnode with undefined type\n"
Log more information when "kAFS: AFS vnode with undefined type\n" is
displayed due to a vnode record being retrieved from the server that
appears to have a duff file type (usually 0).  This prints more information
to try and help pin down the problem.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-07 16:48:44 +01:00
Shenghui Wang 7889f44dd9 io_uring: use cpu_online() to check p->sq_thread_cpu instead of cpu_possible()
This issue is found by running liburing/test/io_uring_setup test.

When test run, the testcase "attempt to bind to invalid cpu" would not
pass with messages like:
   io_uring_setup(1, 0xbfc2f7c8), \
flags: IORING_SETUP_SQPOLL|IORING_SETUP_SQ_AFF, \
resv: 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000, \
sq_thread_cpu: 2
   expected -1, got 3
   FAIL

On my system, there is:
   CPU(s) possible : 0-3
   CPU(s) online   : 0-1
   CPU(s) offline  : 2-3
   CPU(s) present  : 0-1

The sq_thread_cpu 2 is offline on my system, so the bind should fail.
But cpu_possible() will pass the check. We shouldn't be able to bind
to an offline cpu. Use cpu_online() to do the check.

After the change, the testcase run as expected: EINVAL will be returned
for cpu offlined.

Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Shenghui Wang <shhuiw@foxmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-07 08:41:26 -06:00
Roberto Bergantinos Corpas 950a578c61 NFS: make nfs_match_client killable
Actually we don't do anything with return value from
    nfs_wait_client_init_complete in nfs_match_client, as a
    consequence if we get a fatal signal and client is not
    fully initialised, we'll loop to "again" label

    This has been proven to cause soft lockups on some scenarios
    (no-carrier but configured network interfaces)

Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-05-07 10:38:14 -04:00
Linus Torvalds 81ff5d2cba Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
 "API:
   - Add support for AEAD in simd
   - Add fuzz testing to testmgr
   - Add panic_on_fail module parameter to testmgr
   - Use per-CPU struct instead multiple variables in scompress
   - Change verify API for akcipher

  Algorithms:
   - Convert x86 AEAD algorithms over to simd
   - Forbid 2-key 3DES in FIPS mode
   - Add EC-RDSA (GOST 34.10) algorithm

  Drivers:
   - Set output IV with ctr-aes in crypto4xx
   - Set output IV in rockchip
   - Fix potential length overflow with hashing in sun4i-ss
   - Fix computation error with ctr in vmx
   - Add SM4 protected keys support in ccree
   - Remove long-broken mxc-scc driver
   - Add rfc4106(gcm(aes)) cipher support in cavium/nitrox"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (179 commits)
  crypto: ccree - use a proper le32 type for le32 val
  crypto: ccree - remove set but not used variable 'du_size'
  crypto: ccree - Make cc_sec_disable static
  crypto: ccree - fix spelling mistake "protedcted" -> "protected"
  crypto: caam/qi2 - generate hash keys in-place
  crypto: caam/qi2 - fix DMA mapping of stack memory
  crypto: caam/qi2 - fix zero-length buffer DMA mapping
  crypto: stm32/cryp - update to return iv_out
  crypto: stm32/cryp - remove request mutex protection
  crypto: stm32/cryp - add weak key check for DES
  crypto: atmel - remove set but not used variable 'alg_name'
  crypto: picoxcell - Use dev_get_drvdata()
  crypto: crypto4xx - get rid of redundant using_sd variable
  crypto: crypto4xx - use sync skcipher for fallback
  crypto: crypto4xx - fix cfb and ofb "overran dst buffer" issues
  crypto: crypto4xx - fix ctr-aes missing output IV
  crypto: ecrdsa - select ASN1 and OID_REGISTRY for EC-RDSA
  crypto: ux500 - use ccflags-y instead of CFLAGS_<basename>.o
  crypto: ccree - handle tee fips error during power management resume
  crypto: ccree - add function to handle cryptocell tee fips error
  ...
2019-05-06 20:15:06 -07:00
Linus Torvalds 2c6a392cdd Merge branch 'core-stacktrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull stack trace updates from Ingo Molnar:
 "So Thomas looked at the stacktrace code recently and noticed a few
  weirdnesses, and we all know how such stories of crummy kernel code
  meeting German engineering perfection end: a 45-patch series to clean
  it all up! :-)

  Here's the changes in Thomas's words:

   'Struct stack_trace is a sinkhole for input and output parameters
    which is largely pointless for most usage sites. In fact if embedded
    into other data structures it creates indirections and extra storage
    overhead for no benefit.

    Looking at all usage sites makes it clear that they just require an
    interface which is based on a storage array. That array is either on
    stack, global or embedded into some other data structure.

    Some of the stack depot usage sites are outright wrong, but
    fortunately the wrongness just causes more stack being used for
    nothing and does not have functional impact.

    Another oddity is the inconsistent termination of the stack trace
    with ULONG_MAX. It's pointless as the number of entries is what
    determines the length of the stored trace. In fact quite some call
    sites remove the ULONG_MAX marker afterwards with or without nasty
    comments about it. Not all architectures do that and those which do,
    do it inconsistenly either conditional on nr_entries == 0 or
    unconditionally.

    The following series cleans that up by:

      1) Removing the ULONG_MAX termination in the architecture code

      2) Removing the ULONG_MAX fixups at the call sites

      3) Providing plain storage array based interfaces for stacktrace
         and stackdepot.

      4) Cleaning up the mess at the callsites including some related
         cleanups.

      5) Removing the struct stack_trace based interfaces

    This is not changing the struct stack_trace interfaces at the
    architecture level, but it removes the exposure to the generic
    code'"

* 'core-stacktrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)
  x86/stacktrace: Use common infrastructure
  stacktrace: Provide common infrastructure
  lib/stackdepot: Remove obsolete functions
  stacktrace: Remove obsolete functions
  livepatch: Simplify stack trace retrieval
  tracing: Remove the last struct stack_trace usage
  tracing: Simplify stack trace retrieval
  tracing: Make ftrace_trace_userstack() static and conditional
  tracing: Use percpu stack trace buffer more intelligently
  tracing: Simplify stacktrace retrieval in histograms
  lockdep: Simplify stack trace handling
  lockdep: Remove save argument from check_prev_add()
  lockdep: Remove unused trace argument from print_circular_bug()
  drm: Simplify stacktrace handling
  dm persistent data: Simplify stack trace handling
  dm bufio: Simplify stack trace retrieval
  btrfs: ref-verify: Simplify stack trace retrieval
  dma/debug: Simplify stracktrace retrieval
  fault-inject: Simplify stacktrace retrieval
  mm/page_owner: Simplify stack trace handling
  ...
2019-05-06 13:11:48 -07:00
Theodore Ts'o db90f41916 ext4: export /sys/fs/ext4/feature/casefold if Unicode support is present
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-05-06 14:03:52 -04:00
Colin Ian King efeb862bd5 io_uring: fix shadowed variable ret return code being not checked
Currently variable ret is declared in a while-loop code block that
shadows another variable ret. When an error occurs in the while-loop
the error return in ret is not being set in the outer code block and
so the error check on ret is always going to be checking on the wrong
ret variable resulting in check that is always going to be true and
a premature return occurs.

Fix this by removing the declaration of the inner while-loop variable
ret so that shadowing does not occur.

Addresses-Coverity: ("'Constant' variable guards dead code")
Fixes: 6b06314c47 ("io_uring: add file set registration")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-06 10:21:34 -06:00
Kirill Smelkov 438ab720c6 vfs: pass ppos=NULL to .read()/.write() of FMODE_STREAM files
This amends commit 10dce8af34 ("fs: stream_open - opener for
stream-like files so that read and write can run simultaneously without
deadlock") in how position is passed into .read()/.write() handler for
stream-like files:

Rasmus noticed that we currently pass 0 as position and ignore any position
change if that is done by a file implementation. This papers over bugs if ppos
is used in files that declare themselves as being stream-like as such bugs will
go unnoticed. Even if a file implementation is correctly converted into using
stream_open, its read/write later could be changed to use ppos and even though
that won't be working correctly, that bug might go unnoticed without someone
doing wrong behaviour analysis. It is thus better to pass ppos=NULL into
read/write for stream-like files as that don't give any chance for ppos usage
bugs because it will oops if ppos is ever used inside .read() or .write().

Note 1: rw_verify_area, new_sync_{read,write} needs to be updated
because they are called by vfs_read/vfs_write & friends before
file_operations .read/.write .

Note 2: if file backend uses new-style .read_iter/.write_iter, position
is still passed into there as non-pointer kiocb.ki_pos . Currently
stream_open.cocci (semantic patch added by 10dce8af34) ignores files
whose file_operations has *_iter methods.

Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Kirill Smelkov <kirr@nexedi.com>
2019-05-06 17:46:52 +03:00
Jiufei Xue 98487de318 ovl: check the capability before cred overridden
We found that it return success when we set IMMUTABLE_FL flag to a file in
docker even though the docker didn't have the capability
CAP_LINUX_IMMUTABLE.

The commit d1d04ef857 ("ovl: stack file ops") and dab5ca8fd9 ("ovl: add
lsattr/chattr support") implemented chattr operations on a regular overlay
file. ovl_real_ioctl() overridden the current process's subjective
credentials with ofs->creator_cred which have the capability
CAP_LINUX_IMMUTABLE so that it will return success in
vfs_ioctl()->cap_capable().

Fix this by checking the capability before cred overridden. And here we
only care about APPEND_FL and IMMUTABLE_FL, so get these information from
inode.

[SzM: move check and call to underlying fs inside inode locked region to
prevent two such calls from racing with each other]

Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-05-06 14:00:37 +02:00
Amir Goldstein d989903058 ovl: do not generate duplicate fsnotify events for "fake" path
Overlayfs "fake" path is used for stacked file operations on underlying
files.  Operations on files with "fake" path must not generate fsnotify
events with path data, because those events have already been generated at
overlayfs layer and because the reported event->fd for fanotify marks on
underlying inode/filesystem will have the wrong path (the overlayfs path).

Link: https://lore.kernel.org/linux-fsdevel/20190423065024.12695-1-jencce.kernel@gmail.com/
Reported-by: Murphy Zhou <jencce.kernel@gmail.com>
Fixes: d1d04ef857 ("ovl: stack file ops")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-05-06 13:54:51 +02:00
Amir Goldstein 9e46b840c7 ovl: support stacked SEEK_HOLE/SEEK_DATA
Overlay file f_pos is the master copy that is preserved
through copy up and modified on read/write, but only real
fs knows how to SEEK_HOLE/SEEK_DATA and real fs may impose
limitations that are more strict than ->s_maxbytes for specific
files, so we use the real file to perform seeks.

We do not call real fs for SEEK_CUR:0 query and for SEEK_SET:0
requests.

Fixes: d1d04ef857 ("ovl: stack file ops")
Reported-by: Eddie Horng <eddiehorng.tw@gmail.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-05-06 13:54:51 +02:00
Amir Goldstein 3428030da0 ovl: fix missing upper fs freeze protection on copy up for ioctl
Generalize the helper ovl_open_maybe_copy_up() and use it to copy up file
with data before FS_IOC_SETFLAGS ioctl.

The FS_IOC_SETFLAGS ioctl is a bit of an odd ball in vfs, which probably
caused the confusion.  File may be open O_RDONLY, but ioctl modifies the
file.  VFS does not call mnt_want_write_file() nor lock inode mutex, but
fs-specific code for FS_IOC_SETFLAGS does.  So ovl_ioctl() calls
mnt_want_write_file() for the overlay file, and fs-specific code calls
mnt_want_write_file() for upper fs file, but there was no call for
ovl_want_write() for copy up duration which prevents overlayfs from copying
up on a frozen upper fs.

Fixes: dab5ca8fd9 ("ovl: add lsattr/chattr support")
Cc: <stable@vger.kernel.org> # v4.19
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-05-06 13:54:50 +02:00
Linus Torvalds 51987affd6 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:

 - a couple of ->i_link use-after-free fixes

 - regression fix for wrong errno on absent device name in mount(2)
   (this cycle stuff)

 - ancient UFS braino in large GID handling on Solaris UFS images (bogus
   cut'n'paste from large UID handling; wrong field checked to decide
   whether we should look at old (16bit) or new (32bit) field)

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
  Abort file_remove_privs() for non-reg. files
  [fix] get rid of checking for absent device name in vfs_get_tree()
  apparmorfs: fix use-after-free on symlink traversal
  securityfs: fix use-after-free on symlink traversal
2019-05-05 09:28:45 -07:00
Martin Brandenburg 33713cd09c orangefs: truncate before updating size
Otherwise we race with orangefs_writepage/orangefs_writepages
which and does not expect i_size < page_offset.

Fixes xfstests generic/129.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:39:10 -04:00
Mike Marshall dd59a6475c orangefs: copy Orangefs-sized blocks into the pagecache if possible.
->readpage looks in file->private_data to try and find out how the
userspace program set "count" in read(2) or with "dd bs=" or whatever.

->readpage uses "count" and inode->i_size to calculate how much
data Orangefs should deposit in the Orangefs shared buffer, and
remembers which slot the data is in.

After copying data from the Orangefs shared buffer slot into
"the page", readpage tries to increment through the pagecache index
and fill as many pages as it can from the extra data in the shared
buffer. Hopefully these extra pages will soon be needed by the vfs,
and they'll be in the pagecache already.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
2019-05-03 14:32:39 -04:00
Mike Marshall 4077a0f25b orangefs: pass slot index back to readpage.
When userspace deposits more than a page of data into the shared buffer,
we'll need to know which slot it is in when we get back to readpage
so that we can try to use the extra data to fill some extra pages.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
2019-05-03 14:32:39 -04:00
Mike Marshall c2549f8c7a orangefs: remember count when reading.
Orangefs wins when it can do IO on large (up to four meg) blocks at a time,
and looses when it has to do tiny "small io" reads and writes. Accessing
Orangefs through the pagecache with the kernel module helps with small io,
both reading and writing, a great deal. Readpage generally tries to fetch a
page (four k) at a time. We'll let users use "count" (as in read(2) or
pread(2) for example) as a knob to control how much data they get from
Orangefs at a time and we'll try to use the data to fill extra
pagecache pages when we get to ->readpage, hopefully resulting in
fewer calls to readpage and Orangefs userspace.

We need a way to remember how they set count so that we can still have
it available when we get to ->readpage.

 - We'll use file->private_data to keep track of "count".
   We'll wrap generic_file_open with orangefs_file_open and
   initialize private_data to NULL there.

 - In ->read_iter we have access to both "count" and file, so
   we'll kmalloc some space onto file->private_data and store
   "count" there.

 - We'll kfree file->private_data each time we visit ->flush and
   reinitialize it to NULL.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
2019-05-03 14:32:39 -04:00
Martin Brandenburg 8f04e1be78 orangefs: add orangefs_revalidate_mapping
This is modeled after NFS, except our method is different.  We use a
simple timer to determine whether to invalidate the page cache.  This
is bound to perform.

This addes a sysfs parameter cache_timeout_msecs which controls the time
between page cache invalidations.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:39 -04:00
Martin Brandenburg c472ebc255 orangefs: implement writepages
Go through pages and look for a consecutive writable region.  After
finding a number of consecutive writable pages or when finding that
the next page's dirty range is not contiguous and cannot be written
as one request, send the write to the server.

The number of pages is determined by the client-core's buffer size.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:39 -04:00
Martin Brandenburg 52e2d0a380 orangefs: write range tracking
Attach the actual range of bytes written to plus the responsible uid/gid
to each dirty page.  This information must be sent to the server when
the page is written out.

Now write_begin, page_mkwrite, and invalidatepage keep up with this
information.  There are several conditions where they must write out the
page immediately to store the new range.  Two non-contiguous ranges
cannot be stored on a single page.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 90fc07065a orangefs: avoid fsync service operation on flush
Without this, an fsync call is sent to the server even if no data
changed.  This resulted in a rather severe (50%) performance regression
under certain metadata-heavy workloads.

In the past, everything was direct IO.  Nothing happend on a close call.
An explicit fsync call would send an fsync request to the server which
in turn fsynced the underlying file.

Now there are cached writes.  Then fsync began writing out dirty pages
in addition to making an fsync request to the server, and close began
calling fsync.

With this commit, close only writes out dirty pages, and does not make
the fsync request.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 8a88bbce6f orangefs: skip inode writeout if nothing to write
Would happen if an inode is dirty but whatever happened is not something
that can be written out to OrangeFS.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 3e9dfc6e1e orangefs: move do_readv_writev to direct_IO
direct_IO was the only caller and all direct_IO did was call it,
so there's no use in having the code spread out into so many functions.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 43f3457604 orangefs: do not return successful read when the client-core disappeared
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 85ac799cf9 orangefs: implement writepage
Now orangefs_inode_getattr fills from cache if an inode has dirty pages.

also if attr_valid and dirty pages and !flags, we spin on inode writeback
before returning if pages still dirty after: should it be other way

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg c453dcfc79 orangefs: migrate to generic_file_read_iter
Remove orangefs_inode_read.  It was used by readpage.  Calling
wait_for_direct_io directly serves the purpose just as well.  There is
now no check of the bufmap size in the readpage path.  There are already
other places the bufmap size is assumed to be greater than PAGE_SIZE.

Important to call truncate_inode_pages now in the write path so a
subsequent read sees the new data.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 0dcac0f781 orangefs: service ops done for writeback are not killable
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg a68d9c606a orangefs: remove orangefs_readpages
It's a copy of the loop which would run in read_pages from
mm/readahead.c.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg afd9fb2a31 orangefs: reorganize setattr functions to track attribute changes
OrangeFS accepts a mask indicating which attributes were changed.  The
kernel must not set any bits except those that were actually changed.
The kernel must set the uid/gid of the request to the actual uid/gid
responsible for the change.

Code path for notify_change initiated setattrs is

orangefs_setattr(dentry, iattr)
-> __orangefs_setattr(inode, iattr)

In kernel changes are initiated by calling __orangefs_setattr.

Code path for writeback is

orangefs_write_inode
-> orangefs_inode_setattr

attr_valid and attr_uid and attr_gid change together under i_lock.
I_DIRTY changes separately.

__orangefs_setattr
	lock
	if needs to be cleaned first, unlock and retry
	set attr_valid
	copy data in
	unlock
	mark_inode_dirty

orangefs_inode_setattr
	lock
	copy attributes out
	unlock
	clear getattr_time
	# __writeback_single_inode clears dirty

orangefs_inode_getattr
	# possible to get here with attr_valid set and not dirty
	lock
	if getattr_time ok or attr_valid set, unlock and return
	unlock
	do server operation
	# another thread may getattr or setattr, so check for that
	lock
	if getattr_time ok or attr_valid, unlock and return
	else, copy in
	update getattr_time
	unlock

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg df2d7337b5 orangefs: let setattr write to cached inode
This is a fairly big change, but ultimately it's not a lot of code.

Implement write_inode and then avoid the call to orangefs_inode_setattr
within orangefs_setattr.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg f2d34c738c orangefs: set up and use backing_dev_info
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 5e4f606e26 orangefs: hold i_lock during inode_getattr
This should be a no-op now.  When inode writeback works, this will
prevent a getattr from overwriting inode data while an inode is
transitioning to dirty.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 5e7f1d4338 orangefs: update attributes rather than relying on server
This should be a no-op now, but once inode writeback works, it'll be
necessary to have the correct attribute in the dirty inode.

Previously the attribute fetch timeout was marked invalid and the server
provided the updated attribute.  When the inode is dirty, the server
cannot be consulted since it does not yet know the pending setattr.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 8b60785c1d orangefs: simplify orangefs_inode_getattr interface
No need to store the received mask.  It is either STATX_BASIC_STATS or
STATX_BASIC_STATS & ~STATX_SIZE.  If STATX_SIZE is requested, the cache
is bypassed anyway, so the cached mask is unnecessary to decide whether
to do a real getattr.

This is a change.  Previously a getattr would want size and use the
cached size.  All of the in-kernel callers that wanted size did not want
a cached size.  Now a getattr cannot use the cached size if it wants
size at all.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:38 -04:00
Martin Brandenburg 66d5477d70 orangefs: do not invalidate attributes on inode create
When an inode is created, we fetch attributes from the server.  There is
no need to turn around and invalidate them.

No need to initialize attributes after the getattr either.  Either it'll
be exactly the same, or it'll be something else and wrong.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:37 -04:00
Martin Brandenburg fc2e2e9c43 orangefs: implement xattr cache
This uses the same timeout as the getattr cache.  This substantially
increases performance when writing files with smaller buffer sizes.

When writing, the size is (often) changed, which causes a call to
notify_change which calls security_inode_need_killpriv which needs a
getxattr.  Caching it reduces traffic to the server.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2019-05-03 14:32:37 -04:00
Josef Bacik 8fca955057 btrfs: don't double unlock on error in btrfs_punch_hole
If we have an error writing out a delalloc range in
btrfs_punch_hole_lock_range we'll unlock the inode and then goto
out_only_mutex, where we will again unlock the inode.  This is bad,
don't do this.

Fixes: f27451f229 ("Btrfs: add support for fallocate's zero range operation")
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-03 18:21:36 +02:00
Johnny Chang 2b90883c56 btrfs: Check the compression level before getting a workspace
When a file's compression property is set as zlib or zstd but leave
the compression mount option not be set, that means btrfs will try
to compress the file with default compression level. But in
btrfs_compress_pages(), it calls get_workspace() with level = 0.
This will return a workspace with a wrong compression level.
For zlib, the compression level in the workspace will be 0
(that means "store only"). And for zstd, the compression in the
workspace will be 1, not the default level 3.

How to reproduce:
  mkfs -t btrfs /dev/sdb
  mount /dev/sdb /mnt/
  mkdir /mnt/zlib
  btrfs property set /mnt/zlib/ compression zlib
  dd if=/dev/zero of=/mnt/zlib/compression-friendly-file-10M bs=1M count=10
  sync
  btrfs-debugfs -f /mnt/zlib/compression-friendly-file-10M

btrfs-debugfs output:
* before:
  ...
  (258 9961472): ram 524288 disk 1106247680 disk_size 524288
  file: ... extents 20 disk size 10485760 logical size 10485760 ratio 1.00

* after:
 ...
 (258 10354688): ram 131072 disk 14217216 disk_size 4096
 file: ... extents 80 disk size 327680 logical size 10485760 ratio 32.00

The steps for zstd are similar, but need to put a debugging message to
show the level of the return workspace in zstd_get_workspace().

This commit adds a check of the compression level before getting a
workspace by set_level().

CC: stable@vger.kernel.org # 5.1+
Signed-off-by: Johnny Chang <johnnyc@synology.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-03 18:21:25 +02:00
Scott Mayhew 1c73b9d24f nfsd: update callback done processing
Instead of having the convention where individual nfsd4_callback_ops->done
operations return -1 to indicate the callback path is down, move the check
to nfsd4_cb_done.  Only mark the callback path down on transport-level
errors, not NFS-level errors.

The existing logic causes the server to set SEQ4_STATUS_CB_PATH_DOWN
just because the client returned an error to a CB_RECALL for a
delegation that the client had already done a FREE_STATEID for.  But
clearly that error doesn't mean that there's anything wrong with the
backchannel.

Additionally, handle NFS4ERR_DELAY in nfsd4_cb_recall_done.  The client
returns NFS4ERR_DELAY if it is already in the process of returning the
delegation.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-05-03 11:01:38 -04:00
David S. Miller ff24e4980a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Three trivial overlapping conflicts.

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-02 22:14:21 -04:00
Stefan Bühler 5dcf877fb1 req->error only used for iopoll
No need to set it in io_poll_add; io_poll_complete doesn't use it to set
the result in the CQE.

Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02 14:08:54 -06:00
Jens Axboe 9b402849e8 io_uring: add support for eventfd notifications
Allow registration of an eventfd, which will trigger an event every
time a completion event happens for this io_uring instance.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02 14:08:54 -06:00
Jens Axboe 5d17b4a4b7 io_uring: add support for IORING_OP_SYNC_FILE_RANGE
This behaves just like sync_file_range(2) does.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02 14:08:54 -06:00
Jens Axboe 22f96b3808 fs: add sync_file_range() helper
This just pulls out the ksys_sync_file_range() code to work on a struct
file instead of an fd, so we can use it elsewhere.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02 14:08:53 -06:00
Jens Axboe de0617e467 io_uring: add support for marking commands as draining
There are no ordering constraints between the submission and completion
side of io_uring. But sometimes that would be useful to have. One common
example is doing an fsync, for instance, and have it ordered with
previous writes. Without support for that, the application must do this
tracking itself.

This adds a general SQE flag, IOSQE_IO_DRAIN. If a command is marked
with this flag, then it will not be issued before previous commands have
completed, and subsequent commands submitted after the drain will not be
issued before the drain is started.. If there are no pending commands,
setting this flag will not change the behavior of the issue of the
command.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02 14:08:53 -06:00
Linus Torvalds 5ce3307b6d for-linus-20190502
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Merge tag 'for-linus-20190502' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "This is mostly io_uring fixes/tweaks. Most of these were actually done
  in time for the last -rc, but I wanted to ensure that everything
  tested out great before including them. The code delta looks larger
  than it really is, as it's mostly just comment additions/changes.

  Outside of the comment additions/changes, this is mostly removal of
  unnecessary barriers. In all, this pull request contains:

   - Tweak to how we handle errors at submission time. We now post a
     completion event if the error occurs on behalf of an sqe, instead
     of returning it through the system call. If the error happens
     outside of a specific sqe, we return the error through the system
     call. This makes it nicer to use and makes the "normal" use case
     behave the same as the offload cases. (me)

   - Fix for a missing req reference drop from async context (me)

   - If an sqe is submitted with RWF_NOWAIT, don't punt it to async
     context. Return -EAGAIN directly, instead of using it as a hint to
     do async punt. (Stefan)

   - Fix notes on barriers (Stefan)

   - Remove unnecessary barriers (Stefan)

   - Fix potential double free of memory in setup error (Mark)

   - Further improve sq poll CPU validation (Mark)

   - Fix page allocation warning and leak on buffer registration error
     (Mark)

   - Fix iov_iter_type() for new no-ref flag (Ming)

   - Fix a case where dio doesn't honor bio no-page-ref (Ming)"

* tag 'for-linus-20190502' of git://git.kernel.dk/linux-block:
  io_uring: avoid page allocation warnings
  iov_iter: fix iov_iter_type
  block: fix handling for BIO_NO_PAGE_REF
  io_uring: drop req submit reference always in async punt
  io_uring: free allocated io_memory once
  io_uring: fix SQPOLL cpu validation
  io_uring: have submission side sqe errors post a cqe
  io_uring: remove unnecessary barrier after unsetting IORING_SQ_NEED_WAKEUP
  io_uring: remove unnecessary barrier after incrementing dropped counter
  io_uring: remove unnecessary barrier before reading SQ tail
  io_uring: remove unnecessary barrier after updating SQ head
  io_uring: remove unnecessary barrier before reading cq head
  io_uring: remove unnecessary barrier before wq_has_sleeper
  io_uring: fix notes on barriers
  io_uring: fix handling SQEs requesting NOWAIT
2019-05-02 09:55:04 -07:00
Nikolay Borisov b1c16ac978 btrfs: Use kvmalloc for allocating compressed path context
Recent refactoring of cow_file_range_async means it's now possible to
request a rather large physically contiguous memory via kmalloc. The
size is dependent on the number of 512k chunks that the compressed range
consists of. David reported multiple OOM messages on such large
allocations. Fix it by switching to using kvmalloc.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:19 +02:00
Nikolay Borisov 7447555fe7 btrfs: Factor out common extent locking code in submit_compressed_extents
Irrespective of whether the compress code fell back to uncompressed or
a compressed extent has to be submitted, the extent range is always
locked. So factor out the common lock_extent call at the beginning of
the loop. No functional changes just removes one duplicate lock_extent
call.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:19 +02:00
Nikolay Borisov 4336650aff btrfs: Set io_tree only once in submit_compressed_extents
The inode never changes so it's sufficient to dereference it and get
the iotree only once, before the execution of the main loop. No
functional changes, only the size of the function is decreased:

add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-44 (-44)
Function                                     old     new   delta
submit_compressed_extents                   1240    1196     -44
Total: Before=88476, After=88432, chg -0.05%

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:19 +02:00
Nikolay Borisov 69684c5a88 btrfs: Replace clear_extent_bit with unlock_extent
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:19 +02:00
Nikolay Borisov 1368c6dac7 btrfs: Make compress_file_range take only struct async_chunk
All context this function needs is held within struct async_chunk.
Currently we not only pass the struct but also every individual member.
This is redundant, simplify it by only passing struct async_chunk and
leaving it to compress_file_range to extract the values it requires.
No functional changes.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:19 +02:00
Nikolay Borisov c5a68aec4e btrfs: Remove fs_info from struct async_chunk
The associated btrfs_work already contains a reference to the fs_info so
use that instead of passing it via async_chunk. No functional changes.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:19 +02:00
Nikolay Borisov b5326271e7 btrfs: Rename async_cow to async_chunk
Now that we have an explicit async_chunk struct rename references to
variables of this type to async_chunk. No functional changes.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:18 +02:00
Nikolay Borisov 97db120451 btrfs: Preallocate chunks in cow_file_range_async
This commit changes the implementation of cow_file_range_async in order
to get rid of the BUG_ON in the middle of the loop. Additionally it
reworks the inner loop in the hopes of making it more understandable.

The idea is to make async_cow be a top-level structured, shared amongst
all chunks being sent for compression. This allows to perform one memory
allocation at the beginning and gracefully fail the IO if there isn't
enough memory. Now, each chunk is going to be described by an
async_chunk struct. It's the responsibility of the final chunk
to actually free the memory.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:48:18 +02:00
Josef Bacik c8eaeac7b7 btrfs: reserve delalloc metadata differently
With the per-inode block reserves we started refilling the reserve based
on the calculated size of the outstanding csum bytes and extents for the
inode, including the amount we were adding with the new operation.

However, generic/224 exposed a problem with this approach.  With 1000
files all writing at the same time we ended up with a bunch of bytes
being reserved but unusable.

When you write to a file we reserve space for the csum leaves for those
bytes, the number of extent items required to cover those bytes, and a
single transaction item for updating the inode at ordered extent finish
for that range of bytes.  This is held until the ordered extent finishes
and we release all of the reserved space.

If a second write comes in at this point we would add a single
reservation for the new outstanding extent and however many reservations
for the csum leaves.  At this point we find the delta of how much we
have reserved and how much outstanding size this is and attempt to
reserve this delta.  If the first write finishes it will not release any
space, because the space it had reserved for the initial write is still
needed for the second write.  However some space would have been used,
as we have added csums, extent items, and dirtied the inode.  Our
reserved space would be > 0 but less than the total needed reserved
space.

This is just for a single inode, now consider generic/224.  This has
1000 inodes writing in parallel to a very small file system, 1GiB.  In
my testing this usually means we get about a 120MiB metadata area to
work with, more than enough to allow the writes to continue, but not
enough if all of the inodes are stuck trying to reserve the slack space
while continuing to hold their leftovers from their initial writes.

Fix this by pre-reserved _only_ for the space we are currently trying to
add.  Then once that is successful modify our inodes csum count and
outstanding extents, and then add the newly reserved space to the inodes
block_rsv.  This allows us to actually pass generic/224 without running
out of metadata space.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-05-02 13:47:12 +02:00
Al Viro 4e9036042f ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
To choose whether to pick the GID from the old (16bit) or new (32bit)
field, we should check if the old gid field is set to 0xffff.  Mainline
checks the old *UID* field instead - cut'n'paste from the corresponding
code in ufs_get_inode_uid().

Fixes: 252e211e90
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-02 02:24:50 -04:00
Eric Sandeen 910832697c xfs: change some error-less functions to void types
There are several functions which have no opportunity to return
an error, and don't contain any ASSERTs which could be argued
to be better constructed as error cases.  So, make them voids
to simplify the callers.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
2019-05-01 20:26:30 -07:00
Christoph Hellwig cbbf4c0be8 iomap: move iomap_read_inline_data around
iomap_read_inline_data ended up being placed in the middle of the bio
based read I/O completion handling, which tends to confuse the heck out
of me whenever I follow the code.  Move it to a more suitable place.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-05-01 20:16:40 -07:00
Al Viro f276ae0dd6 orangefs: make use of ->free_inode()
Acked-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:27 -04:00
Al Viro b62de32257 hugetlb: make use of ->free_inode()
moving synchronous parts of ->destroy_inode() to ->evict_inode() is
not possible here - they are balancing the stuff done in ->alloc_inode(),
not the things acquired while using it or sanity checks.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:27 -04:00
Al Viro 0b269ded4e overlayfs: make use of ->free_inode()
synchronous parts are left in ->destroy_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:27 -04:00
Al Viro b3b4a6e356 jfs: switch to ->free_inode()
synchronous part can be moved to ->evict_inode(), the rest -
->free_inode() fodder

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 9baf28bbfe fuse: switch to ->free_inode()
fuse_destroy_inode() is gone - sanity checks that need the stack
trace of the caller get moved into ->evict_inode(), the rest joins
the RCU-delayed part which becomes ->free_inode().

While we are at it, don't just pass the address of what happens
to be the first member of structure to kmem_cache_free() -
get_fuse_inode() is there for purpose and it gives the proper
container_of() use.  No behaviour change, but verifying correctness
is easier that way.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 94053139d4 ext4: make use of ->free_inode()
the rest of this ->destroy_inode() instance could probably be folded
into ext4_evict_inode()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 586a94fdc9 ecryptfs: make use of ->free_inode()
no idea if crypto destruction could be moved there as well

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro cfa6d41263 ceph: use ->free_inode()
a lot of non-delayed work in this case; all of that is left in
->destroy_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 26602cab41 btrfs: use ->free_inode()
a lot of stuff remains in ->destroy_inode()

Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 51b9fe48c4 afs: switch to use of ->free_inode()
debugging printks left in ->destroy_inode() and so's the
update of inode count; we could take the latter to RCU-delayed
part (would take only moving the check on module exit past
rcu_barrier() there), but debugging output ought to either
stay where it is or go into ->evict_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro a2b757fe0f ntfs: switch to ->free_inode()
move the synchronous stuff from ->destroy_inode() to ->evict_inode(),
turn the RCU-delayed part into ->free_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 98835e884c ufs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro d984892bd7 coda: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:26 -04:00
Al Viro 6becf8edf1 sysv: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro a78bb3838d udf: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro dc43175996 ubifs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 56b5af1931 squashfs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro bcb8d71bda romfs: convert to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro a5a8cbea63 reiserfs: convert to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 45c2a3ff3a qnx6: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro bc40ddd12c qnx4: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 4aa6b55c05 procfs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 363db959ae openpromfs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro e91b9194bc ocfs2: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 9fbc000786 dlmfs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 977c3d1894 nilfs2: switch to ->free_inode()
kill an extern that went stale 9 years ago, while we are at it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro ca1a199e3b nfs{,4}: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro d67a398a5f minix: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro db0bd7b719 jffs2: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:25 -04:00
Al Viro 07b0120710 isofs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:24 -04:00
Al Viro 4d436d5cd5 hpfs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:24 -04:00
Al Viro 08ccfc5c36 hostfs: switch to ->free_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-05-01 22:43:24 -04:00