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for-4.16-rc1-tag 

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Merge tag 'for-4.16-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "We have a few assorted fixes, some of them show up during fstests so I
  gave them more testing"

* tag 'for-4.16-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: Fix use-after-free when cleaning up fs_devs with a single stale device
  Btrfs: fix null pointer dereference when replacing missing device
  btrfs: remove spurious WARN_ON(ref->count < 0) in find_parent_nodes
  btrfs: Ignore errors from btrfs_qgroup_trace_extent_post
  Btrfs: fix unexpected -EEXIST when creating new inode
  Btrfs: fix use-after-free on root->orphan_block_rsv
  Btrfs: fix btrfs_evict_inode to handle abnormal inodes correctly
  Btrfs: fix extent state leak from tree log
  Btrfs: fix crash due to not cleaning up tree log block's dirty bits
  Btrfs: fix deadlock in run_delalloc_nocow
This commit is contained in:
Linus Torvalds 2018-02-16 09:26:18 -08:00
parent c85b0b1434 fd649f10c3
commit da370f1d63
7 changed files with 81 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/btrfs/backref.c
View File

@ -1264,7 +1264,16 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
while (node) {
ref = rb_entry(node, struct prelim_ref, rbnode);
node = rb_next(&ref->rbnode);
WARN_ON(ref->count < 0);
/*
* ref->count < 0 can happen here if there are delayed
* refs with a node->action of BTRFS_DROP_DELAYED_REF.
* prelim_ref_insert() relies on this when merging
* identical refs to keep the overall count correct.
* prelim_ref_insert() will merge only those refs
* which compare identically. Any refs having
* e.g. different offsets would not be merged,
* and would retain their original ref->count < 0.
*/
if (roots && ref->count && ref->root_id && ref->parent == 0) {
if (sc && sc->root_objectid &&
ref->root_id != sc->root_objectid) {

3
fs/btrfs/delayed-ref.c
View File

@ -821,7 +821,8 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
spin_unlock(&delayed_refs->lock);
if (qrecord_inserted)
return btrfs_qgroup_trace_extent_post(fs_info, record);
btrfs_qgroup_trace_extent_post(fs_info, record);
return 0;
free_head_ref:

4
fs/btrfs/extent-tree.c
View File

@ -2147,6 +2147,10 @@ int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
u64 bytes;
struct request_queue *req_q;
if (!stripe->dev->bdev) {
ASSERT(btrfs_test_opt(fs_info, DEGRADED));
continue;
}
req_q = bdev_get_queue(stripe->dev->bdev);
if (!blk_queue_discard(req_q))
continue;

43
fs/btrfs/inode.c
View File

@ -1335,8 +1335,11 @@ static noinline int run_delalloc_nocow(struct inode *inode,
leaf = path->nodes[0];
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
if (ret < 0) {
if (cow_start != (u64)-1)
cur_offset = cow_start;
goto error;
}
if (ret > 0)
break;
leaf = path->nodes[0];
@ -3385,6 +3388,11 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans,
ret = btrfs_orphan_reserve_metadata(trans, inode);
ASSERT(!ret);
if (ret) {
/*
* dec doesn't need spin_lock as ->orphan_block_rsv
* would be released only if ->orphan_inodes is
* zero.
*/
atomic_dec(&root->orphan_inodes);
clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags);
@ -3399,12 +3407,17 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans,
if (insert >= 1) {
ret = btrfs_insert_orphan_item(trans, root, btrfs_ino(inode));
if (ret) {
atomic_dec(&root->orphan_inodes);
if (reserve) {
clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags);
btrfs_orphan_release_metadata(inode);
}
/*
* btrfs_orphan_commit_root may race with us and set
* ->orphan_block_rsv to zero, in order to avoid that,
* decrease ->orphan_inodes after everything is done.
*/
atomic_dec(&root->orphan_inodes);
if (ret != -EEXIST) {
clear_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&inode->runtime_flags);
@ -3436,29 +3449,27 @@ static int btrfs_orphan_del(struct btrfs_trans_handle *trans,
{
struct btrfs_root *root = inode->root;
int delete_item = 0;
int release_rsv = 0;
int ret = 0;
spin_lock(&root->orphan_lock);
if (test_and_clear_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&inode->runtime_flags))
delete_item = 1;
if (delete_item && trans)
ret = btrfs_del_orphan_item(trans, root, btrfs_ino(inode));
if (test_and_clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&inode->runtime_flags))
release_rsv = 1;
spin_unlock(&root->orphan_lock);
if (delete_item) {
atomic_dec(&root->orphan_inodes);
if (trans)
ret = btrfs_del_orphan_item(trans, root,
btrfs_ino(inode));
}
if (release_rsv)
btrfs_orphan_release_metadata(inode);
/*
* btrfs_orphan_commit_root may race with us and set ->orphan_block_rsv
* to zero, in order to avoid that, decrease ->orphan_inodes after
* everything is done.
*/
if (delete_item)
atomic_dec(&root->orphan_inodes);
return ret;
}
@ -5281,7 +5292,7 @@ void btrfs_evict_inode(struct inode *inode)
trace_btrfs_inode_evict(inode);
if (!root) {
kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));
clear_inode(inode);
return;
}

9
fs/btrfs/qgroup.c
View File

@ -1442,8 +1442,13 @@ int btrfs_qgroup_trace_extent_post(struct btrfs_fs_info *fs_info,
int ret;
ret = btrfs_find_all_roots(NULL, fs_info, bytenr, 0, &old_root, false);
if (ret < 0)
return ret;
if (ret < 0) {
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
btrfs_warn(fs_info,
"error accounting new delayed refs extent (err code: %d), quota inconsistent",
ret);
return 0;
}
/*
* Here we don't need to get the lock of

32
fs/btrfs/tree-log.c
View File

@ -29,6 +29,7 @@
#include "hash.h"
#include "compression.h"
#include "qgroup.h"
#include "inode-map.h"
/* magic values for the inode_only field in btrfs_log_inode:
*
@ -2472,6 +2473,9 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
clean_tree_block(fs_info, next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
} else {
if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &next->bflags))
clear_extent_buffer_dirty(next);
}
WARN_ON(root_owner !=
@ -2552,6 +2556,9 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
clean_tree_block(fs_info, next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
} else {
if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &next->bflags))
clear_extent_buffer_dirty(next);
}
WARN_ON(root_owner != BTRFS_TREE_LOG_OBJECTID);
@ -2630,6 +2637,9 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
clean_tree_block(fs_info, next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
} else {
if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &next->bflags))
clear_extent_buffer_dirty(next);
}
WARN_ON(log->root_key.objectid !=
@ -3018,13 +3028,14 @@ static void free_log_tree(struct btrfs_trans_handle *trans,
while (1) {
ret = find_first_extent_bit(&log->dirty_log_pages,
0, &start, &end, EXTENT_DIRTY | EXTENT_NEW,
0, &start, &end,
EXTENT_DIRTY | EXTENT_NEW | EXTENT_NEED_WAIT,
NULL);
if (ret)
break;
clear_extent_bits(&log->dirty_log_pages, start, end,
EXTENT_DIRTY | EXTENT_NEW);
EXTENT_DIRTY | EXTENT_NEW | EXTENT_NEED_WAIT);
}
/*
@ -5677,6 +5688,23 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
path);
}
if (!ret && wc.stage == LOG_WALK_REPLAY_ALL) {
struct btrfs_root *root = wc.replay_dest;
btrfs_release_path(path);
/*
* We have just replayed everything, and the highest
* objectid of fs roots probably has changed in case
* some inode_item's got replayed.
*
* root->objectid_mutex is not acquired as log replay
* could only happen during mount.
*/
ret = btrfs_find_highest_objectid(root,
&root->highest_objectid);
}
key.offset = found_key.offset - 1;
wc.replay_dest->log_root = NULL;
free_extent_buffer(log->node);

1
fs/btrfs/volumes.c
View File

@ -645,6 +645,7 @@ static void btrfs_free_stale_devices(const char *path,
btrfs_sysfs_remove_fsid(fs_devs);
list_del(&fs_devs->list);
free_fs_devices(fs_devs);
break;
} else {
fs_devs->num_devices--;
list_del(&dev->dev_list);