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| author | Omar Sandoval <osandov@fb.com> | 2019-08-14 01:00:02 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-03-14 13:13:51 +0100 |
| commit | 7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22 (patch) | |
| tree | 97c42d1bcd553b2ef14e5b2494b4f303585e09b1 /fs/btrfs/compression.h | |
| parent | btrfs: add BTRFS_IOC_ENCODED_READ ioctl (diff) | |
| download | linux-7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22.tar.xz linux-7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22.zip | |
btrfs: add BTRFS_IOC_ENCODED_WRITE
The implementation resembles direct I/O: we have to flush any ordered
extents, invalidate the page cache, and do the io tree/delalloc/extent
map/ordered extent dance. From there, we can reuse the compression code
with a minor modification to distinguish the write from writeback. This
also creates inline extents when possible.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
| -rw-r--r-- | fs/btrfs/compression.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h index 7dbd14caab01..7773953470e3 100644 --- a/fs/btrfs/compression.h +++ b/fs/btrfs/compression.h @@ -54,6 +54,9 @@ struct compressed_bio { /* The compression algorithm for this bio */ u8 compress_type; + /* Whether this is a write for writeback. */ + bool writeback; + /* IO errors */ u8 errors; int mirror_num; @@ -97,7 +100,8 @@ blk_status_t btrfs_submit_compressed_write(struct btrfs_inode *inode, u64 start, struct page **compressed_pages, unsigned int nr_pages, unsigned int write_flags, - struct cgroup_subsys_state *blkcg_css); + struct cgroup_subsys_state *blkcg_css, + bool writeback); blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, int mirror_num, unsigned long bio_flags); |