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| author | Josef Bacik <josef@toxicpanda.com> | 2019-06-18 16:09:21 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-07-02 12:30:52 +0200 |
| commit | bb96c4e5742022b79b5bda5f52218b3d2785accd (patch) | |
| tree | b0a50be851eaec78aa2694de5d83ea9014f5aad6 /fs/btrfs/space-info.h | |
| parent | 41783ef24d56ce45452db7c413df9a3bdcc8d651 (diff) | |
| download | linux-bb96c4e5742022b79b5bda5f52218b3d2785accd.tar.gz | |
btrfs: move the space info update macro to space-info.h
Also rename it to btrfs_space_info_update_* so it's clear what we're updating. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/space-info.h')
| -rw-r--r-- | fs/btrfs/space-info.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/btrfs/space-info.h b/fs/btrfs/space-info.h index fcec5286e0cb..702e431580c6 100644 --- a/fs/btrfs/space-info.h +++ b/fs/btrfs/space-info.h @@ -75,6 +75,29 @@ static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); } +/* + * + * Declare a helper function to detect underflow of various space info members + */ +#define DECLARE_SPACE_INFO_UPDATE(name) \ +static inline void \ +btrfs_space_info_update_##name(struct btrfs_fs_info *fs_info, \ + struct btrfs_space_info *sinfo, \ + s64 bytes) \ +{ \ + lockdep_assert_held(&sinfo->lock); \ + trace_update_##name(fs_info, sinfo, sinfo->name, bytes); \ + if (bytes < 0 && sinfo->name < -bytes) { \ + WARN_ON(1); \ + sinfo->name = 0; \ + return; \ + } \ + sinfo->name += bytes; \ +} + +DECLARE_SPACE_INFO_UPDATE(bytes_may_use); +DECLARE_SPACE_INFO_UPDATE(bytes_pinned); + void btrfs_space_info_add_new_bytes(struct btrfs_fs_info *fs_info, struct btrfs_space_info *space_info, u64 num_bytes); |