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| author |  Omar Sandoval <osandov@fb.com>
| 2019-11-06 15:38:43 -0800 |
|---|---|---|
| committer |  David Sterba <dsterba@suse.com>
| 2022-03-14 13:13:50 +0100 |
| commit | e331f6b19f8adde2307588bb325ae5de78617c20 (patch) | |
| tree | 9e32b73b93efe978336c1fae812ed5bb387803bc /fs/btrfs/inode.c | |
| parent | fs: export variant of generic_write_checks without iov_iter (diff) | |
| download | linux-e331f6b19f8adde2307588bb325ae5de78617c20.tar.gz linux-e331f6b19f8adde2307588bb325ae5de78617c20.tar.bz2 linux-e331f6b19f8adde2307588bb325ae5de78617c20.zip | |
btrfs: don't advance offset for compressed bios in btrfs_csum_one_bio()
btrfs_csum_one_bio() loops over each filesystem block in the bio while
keeping a cursor of its current logical position in the file in order to
look up the ordered extent to add the checksums to. However, this
doesn't make much sense for compressed extents, as a sector on disk does
not correspond to a sector of decompressed file data. It happens to work
because:
1) the compressed bio always covers one ordered extent
2) the size of the bio is always less than the size of the ordered
extent
However, the second point will not always be true for encoded writes.
Let's add a boolean parameter to btrfs_csum_one_bio() to indicate that
it can assume that the bio only covers one ordered extent. Since we're
already changing the signature, let's get rid of the contig parameter
and make it implied by the offset parameter, similar to the change we
recently made to btrfs_lookup_bio_sums(). Additionally, let's rename
nr_sectors to blockcount to make it clear that it's the number of
filesystem blocks, not the number of 512-byte sectors.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index ffe327090277..26fd111218c7 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2314,7 +2314,7 @@ void btrfs_clear_delalloc_extent(struct inode *vfs_inode, static blk_status_t btrfs_submit_bio_start(struct inode *inode, struct bio *bio, u64 dio_file_offset) { - return btrfs_csum_one_bio(BTRFS_I(inode), bio, 0, 0); + return btrfs_csum_one_bio(BTRFS_I(inode), bio, (u64)-1, false); } /* @@ -2566,7 +2566,7 @@ blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 0, btrfs_submit_bio_start); goto out; } else if (!skip_sum) { - ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, 0, 0); + ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, (u64)-1, false); if (ret) goto out; } @@ -7845,7 +7845,7 @@ static blk_status_t btrfs_submit_bio_start_direct_io(struct inode *inode, struct bio *bio, u64 dio_file_offset) { - return btrfs_csum_one_bio(BTRFS_I(inode), bio, dio_file_offset, 1); + return btrfs_csum_one_bio(BTRFS_I(inode), bio, dio_file_offset, false); } static void btrfs_end_dio_bio(struct bio *bio) @@ -7902,7 +7902,7 @@ static inline blk_status_t btrfs_submit_dio_bio(struct bio *bio, * If we aren't doing async submit, calculate the csum of the * bio now. */ - ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, file_offset, 1); + ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, file_offset, false); if (ret) goto err; } else { |