mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-02 17:49:03 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

bcachefs: Fix bch2_seek_hole() locking

Browse source 
We can't call bch2_seek_pagecache_hole(), and block on page locks, with
btree locks held.

This is easily fixed because we're at the end of the transaction - we
can just unlock, we don't need a drop_locks_do().

Reported-by: https://github.com/nagalun
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2025-03-27 13:34:13 -04:00
parent 2dd202dbaf
commit 1f4bb8254c
1 changed files with 12 additions and 10 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
fs/bcachefs/fs-io.c
View file

@ -999,17 +999,19 @@ static loff_t bch2_seek_hole(struct file *file, u64 offset)
POS(inode->v.i_ino, offset >> 9),
POS(inode->v.i_ino, U64_MAX),
inum.subvol, BTREE_ITER_slots, k, ({
if (k.k->p.inode != inode->v.i_ino) {
next_hole = bch2_seek_pagecache_hole(&inode->v,
offset, MAX_LFS_FILESIZE, 0, false);
break;
} else if (!bkey_extent_is_data(k.k)) {
next_hole = bch2_seek_pagecache_hole(&inode->v,
max(offset, bkey_start_offset(k.k) << 9),
k.k->p.offset << 9, 0, false);
if (k.k->p.inode != inode->v.i_ino ||
!bkey_extent_is_data(k.k)) {
loff_t start_offset = k.k->p.inode == inode->v.i_ino
? max(offset, bkey_start_offset(k.k) << 9)
: offset;
loff_t end_offset = k.k->p.inode == inode->v.i_ino
? MAX_LFS_FILESIZE
: k.k->p.offset << 9;
if (next_hole < k.k->p.offset << 9)
break;
bch2_trans_unlock(trans);
next_hole = bch2_seek_pagecache_hole(&inode->v,
start_offset, end_offset, 0, false);
break;
} else {
offset = max(offset, bkey_start_offset(k.k) << 9);
}