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| author | Josef Bacik <josef@toxicpanda.com> | 2017-10-19 20:15:57 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-11-01 20:45:35 +0100 |
| commit | 69fe2d75dd91d0124ad2ab6e9fef07633bd730e0 (patch) | |
| tree | f1fce885741f552319a33c65f5957da8fe78aa77 /fs/btrfs/ctree.h | |
| parent | btrfs: add tracepoints for outstanding extents mods (diff) | |
| download | linux-69fe2d75dd91d0124ad2ab6e9fef07633bd730e0.tar.xz linux-69fe2d75dd91d0124ad2ab6e9fef07633bd730e0.zip | |
btrfs: make the delalloc block rsv per inode
The way we handle delalloc metadata reservations has gotten
progressively more complicated over the years. There is so much cruft
and weirdness around keeping the reserved count and outstanding counters
consistent and handling the error cases that it's impossible to
understand.
Fix this by making the delalloc block rsv per-inode. This way we can
calculate the actual size of the outstanding metadata reservations every
time we make a change, and then reserve the delta based on that amount.
This greatly simplifies the code everywhere, and makes the error
handling in btrfs_delalloc_reserve_metadata far less terrifying.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 2ede3b6ceb68..f7df5536ab61 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -763,8 +763,6 @@ struct btrfs_fs_info { * delayed dir index item */ struct btrfs_block_rsv global_block_rsv; - /* block reservation for delay allocation */ - struct btrfs_block_rsv delalloc_block_rsv; /* block reservation for metadata operations */ struct btrfs_block_rsv trans_block_rsv; /* block reservation for chunk tree */ @@ -2757,6 +2755,9 @@ int btrfs_delalloc_reserve_space(struct inode *inode, void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, unsigned short type); +void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *rsv, + unsigned short type); void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, struct btrfs_block_rsv *rsv); void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); |