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| author | Zygo Blaxell <ce3g8jdj@umail.furryterror.org> | 2017-09-22 13:58:47 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-11-01 20:45:35 +0100 |
| commit | b115e3bc81aeb624fe7c4eccecbd094601ebde84 (patch) | |
| tree | a12357bce68457e0757f030589dbed9f46336b5c /fs/btrfs | |
| parent | d24a67b2d997c860a42516076f3315c2ad2d2884 (diff) | |
| download | linux-stable-b115e3bc81aeb624fe7c4eccecbd094601ebde84.tar.gz linux-stable-b115e3bc81aeb624fe7c4eccecbd094601ebde84.tar.bz2 linux-stable-b115e3bc81aeb624fe7c4eccecbd094601ebde84.zip | |
btrfs: increase output size for LOGICAL_INO_V2 ioctl
Build-server workloads have hundreds of references per file after dedup.
Multiply by a few snapshots and we quickly exhaust the limit of 2730
references per extent that can fit into a 64K buffer.
Raise the limit to 16M to be consistent with other btrfs ioctls
(e.g. TREE_SEARCH_V2, FILE_EXTENT_SAME).
To minimize surprising userspace behavior, apply this change only to
the LOGICAL_INO_V2 ioctl.
Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Reviewed-by: Hans van Kranenburg <hans.van.kranenburg@mendix.com>
Tested-by: Hans van Kranenburg <hans.van.kranenburg@mendix.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index fa9996ab3da6..0afa79c65b9f 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4548,6 +4548,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info, if (version == 1) { ignore_offset = false; + size = min_t(u32, loi->size, SZ_64K); } else { /* All reserved bits must be 0 for now */ if (memchr_inv(loi->reserved, 0, sizeof(loi->reserved))) { @@ -4560,6 +4561,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info, goto out_loi; } ignore_offset = loi->flags & BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET; + size = min_t(u32, loi->size, SZ_16M); } path = btrfs_alloc_path(); @@ -4568,7 +4570,6 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info, goto out; } - size = min_t(u32, loi->size, SZ_64K); inodes = init_data_container(size); if (IS_ERR(inodes)) { ret = PTR_ERR(inodes); |