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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2019-06-03 17:58:57 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-07-01 14:35:02 +0300 |
| commit | d5178578bcd461cc79118c7a139882350fe505aa (patch) | |
| tree | b6ee534e6aca76d6aee0c18ecf01fd7b7f576449 /fs/btrfs/file-item.c | |
| parent | 6d97c6e31b553bc9f58b83ac3c4c79c17affbda8 (diff) | |
| download | linux-d5178578bcd461cc79118c7a139882350fe505aa.tar.xz | |
btrfs: directly call into crypto framework for checksumming
Currently btrfs_csum_data() relied on the crc32c() wrapper around the
crypto framework for calculating the CRCs.
As we have our own crypto_shash structure in the fs_info now, we can
directly call into the crypto framework without going trough the wrapper.
This way we can even remove the btrfs_csum_data() and btrfs_csum_final()
wrappers.
The module dependency on crc32c is preserved via MODULE_SOFTDEP("pre:
crc32c"), which was previously provided by LIBCRC32C config option doing
the same.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/file-item.c')
| -rw-r--r-- | fs/btrfs/file-item.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index de89fd1310a6..1a599f50837b 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -8,6 +8,7 @@ #include <linux/pagemap.h> #include <linux/highmem.h> #include <linux/sched/mm.h> +#include <crypto/hash.h> #include "ctree.h" #include "disk-io.h" #include "transaction.h" @@ -432,6 +433,7 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, u64 file_start, int contig) { struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); + SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); struct btrfs_ordered_sum *sums; struct btrfs_ordered_extent *ordered = NULL; char *data; @@ -465,6 +467,8 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, sums->bytenr = (u64)bio->bi_iter.bi_sector << 9; index = 0; + shash->tfm = fs_info->csum_shash; + bio_for_each_segment(bvec, bio, iter) { if (!contig) offset = page_offset(bvec.bv_page) + bvec.bv_offset; @@ -479,8 +483,6 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, - 1); for (i = 0; i < nr_sectors; i++) { - u32 tmp; - if (offset >= ordered->file_offset + ordered->len || offset < ordered->file_offset) { unsigned long bytes_left; @@ -506,15 +508,13 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, index = 0; } - memset(&sums->sums[index], 0xff, csum_size); + crypto_shash_init(shash); data = kmap_atomic(bvec.bv_page); - tmp = btrfs_csum_data(data + bvec.bv_offset - + (i * fs_info->sectorsize), - *(u32 *)&sums->sums[index], - fs_info->sectorsize); + crypto_shash_update(shash, data + bvec.bv_offset + + (i * fs_info->sectorsize), + fs_info->sectorsize); kunmap_atomic(data); - btrfs_csum_final(tmp, - (char *)(sums->sums + index)); + crypto_shash_final(shash, (char *)(sums->sums + index)); index += csum_size; offset += fs_info->sectorsize; this_sum_bytes += fs_info->sectorsize; |