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linux/fs/nfsd
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Anna Schumaker 403217f304 SUNRPC/NFSD: Implement xdr_reserve_space_vec() 
Reserving space for a large READ payload requires special handling when
reserving space in the xdr buffer pages. One problem we can have is use
of the scratch buffer, which is used to get a pointer to a contiguous
region of data up to PAGE_SIZE. When using the scratch buffer, calls to
xdr_commit_encode() shift the data to it's proper alignment in the xdr
buffer. If we've reserved several pages in a vector, then this could
potentially invalidate earlier pointers and result in incorrect READ
data being sent to the client.

I get around this by looking at the amount of space left in the current
page, and never reserve more than that for each entry in the read
vector. This lets us place data directly where it needs to go in the
buffer pages.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
 		2020-09-25 18:01:27 -04:00
..
Kconfig nfsd: remove fault injection code 2020-09-25 18:01:26 -04:00
Makefile nfsd: remove fault injection code 2020-09-25 18:01:26 -04:00
acl.h nfsd: eliminate an unnecessary acl size limit 2019-08-28 21:13:45 -04:00
auth.c nfsd: auth: Fix gid sorting when rootsquash enabled 2018-01-22 20:13:07 -08:00
auth.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blocklayout.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
blocklayoutxdr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blocklayoutxdr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cache.h nfsd4: make drc_slab global, not per-net 2020-06-01 17:44:45 -04:00
current_stateid.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
export.c nfsd: export upcalls must not return ESTALE when mountd is down 2020-03-16 12:04:33 -04:00
export.h knfsd: Allow lockless lookups of the exports 2018-10-29 16:58:04 -04:00
fault_inject.c nfsd: no need to check return value of debugfs_create functions 2019-07-03 16:57:17 +02:00
filecache.c fsnotify: create method handle_inode_event() in fsnotify_operations 2020-07-27 23:25:50 +02:00
filecache.h nfsd: convert file cache to use over/underflow safe refcount 2020-02-06 11:22:55 -05:00
flexfilelayout.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flexfilelayoutxdr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flexfilelayoutxdr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idmap.h nfsd: Remove duplicate define of IDMAP_NAMESZ/IDMAP_TYPE_xx 2015-07-20 14:58:46 -04:00
lockd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netns.h nfsd: netns.h: delete a duplicated word 2020-07-24 17:25:13 -04:00
nfs2acl.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nfs3acl.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nfs3proc.c nfsd: Ensure sampling of the write verifier is atomic with the write 2020-01-22 16:25:41 -05:00
nfs3xdr.c nfsd: Ensure sampling of the write verifier is atomic with the write 2020-01-22 16:25:41 -05:00
nfs4acl.c nfsd: check permissions when setting ACLs 2016-06-24 12:11:52 -04:00
nfs4callback.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfs4idmap.c nfsd: Use seq_putc() in two functions 2020-07-13 17:28:46 -04:00
nfs4layouts.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfs4proc.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfs4recover.c nfsd: avoid a NULL dereference in __cld_pipe_upcall() 2020-07-13 17:28:46 -04:00
nfs4state.c nfsd: rename delegation related tracepoints to make them less confusing 2020-09-25 18:01:27 -04:00
nfs4xdr.c SUNRPC/NFSD: Implement xdr_reserve_space_vec() 2020-09-25 18:01:27 -04:00
nfscache.c nfsd: safer handling of corrupted c_type 2020-06-03 11:12:32 -04:00
nfsctl.c nfsd: remove fault injection code 2020-09-25 18:01:26 -04:00
nfsd.h nfsd: add defines for NFSv4.2 extended attribute support 2020-07-13 17:27:03 -04:00
nfsfh.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfsfh.h nfsd: handle nfs3 timestamps as unsigned 2019-12-19 17:46:08 -05:00
nfsproc.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfssvc.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfsxdr.c nfsd: knfsd must use the container user namespace 2019-04-24 09:46:35 -04:00
pnfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
state.h nfsd: remove fault injection code 2020-09-25 18:01:26 -04:00
stats.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
stats.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace.c nfsd: move include of state.h from trace.c to trace.h 2015-10-23 15:57:29 -04:00
trace.h nfsd: rename delegation related tracepoints to make them less confusing 2020-09-25 18:01:27 -04:00
vfs.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
vfs.h nfsd: define xattr functions to call into their vfs counterparts 2020-07-13 17:27:03 -04:00
xdr.h NFSD: Clean up legacy NFS SYMLINK argument XDR decoders 2018-04-03 15:08:16 -04:00
xdr3.h nfsd: Ensure sampling of the write verifier is atomic with the write 2020-01-22 16:25:41 -05:00
xdr4.h nfsd: add structure definitions for xattr requests / responses 2020-07-13 17:27:03 -04:00
xdr4cb.h NFSD CB_OFFLOAD xdr 2018-09-25 20:34:54 -04:00