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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2019-05-22 10:18:59 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-07-01 13:35:00 +0200 |
| commit | 65019df8c3b0efa363c30ca4dd69a1a370a3ebe8 (patch) | |
| tree | 868cb694ca3028669910449e92b11426e54b97f9 /fs | |
| parent | 5852c8b961542f997aa5aeee9c80e745e7af2d63 (diff) | |
| download | linux-65019df8c3b0efa363c30ca4dd69a1a370a3ebe8.tar.gz | |
btrfs: resurrect btrfs_crc32c()
Commit 9678c54388b6 ("btrfs: Remove custom crc32c init code") removed
the btrfs_crc32c() function, because it was a duplicate of the crc32c()
library function we already have in the kernel.
Resurrect it as a shim wrapper over crc32c() to make following
transformations of the checksumming code in btrfs easier.
Also provide a btrfs_crc32_final() to ease following transformations.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
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')
| -rw-r--r-- | fs/btrfs/ctree.h | 11 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 6 | ||||
| -rw-r--r-- | fs/btrfs/send.c | 2 |
3 files changed, 15 insertions, 4 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 1baa8cc39571..3691cd177ead 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -19,6 +19,7 @@ #include <linux/kobject.h> #include <trace/events/btrfs.h> #include <asm/kmap_types.h> +#include <asm/unaligned.h> #include <linux/pagemap.h> #include <linux/btrfs.h> #include <linux/btrfs_tree.h> @@ -2644,6 +2645,16 @@ BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ btrfs_item_offset_nr(leaf, slot))) +static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) +{ + return crc32c(crc, address, length); +} + +static inline void btrfs_crc32c_final(u32 crc, u8 *result) +{ + put_unaligned_le32(~crc, result); +} + static inline u64 btrfs_name_hash(const char *name, int len) { return crc32c((u32)~1, name, len); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f63dfb777e4a..5d736d8ae3e3 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -1135,11 +1135,11 @@ static u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset) __le64 lenum; lenum = cpu_to_le64(root_objectid); - high_crc = crc32c(high_crc, &lenum, sizeof(lenum)); + high_crc = btrfs_crc32c(high_crc, &lenum, sizeof(lenum)); lenum = cpu_to_le64(owner); - low_crc = crc32c(low_crc, &lenum, sizeof(lenum)); + low_crc = btrfs_crc32c(low_crc, &lenum, sizeof(lenum)); lenum = cpu_to_le64(offset); - low_crc = crc32c(low_crc, &lenum, sizeof(lenum)); + low_crc = btrfs_crc32c(low_crc, &lenum, sizeof(lenum)); return ((u64)high_crc << 31) ^ (u64)low_crc; } diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index f7fe4770f0e5..49edcc709a99 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -686,7 +686,7 @@ static int send_cmd(struct send_ctx *sctx) hdr->len = cpu_to_le32(sctx->send_size - sizeof(*hdr)); hdr->crc = 0; - crc = crc32c(0, (unsigned char *)sctx->send_buf, sctx->send_size); + crc = btrfs_crc32c(0, (unsigned char *)sctx->send_buf, sctx->send_size); hdr->crc = cpu_to_le32(crc); ret = write_buf(sctx->send_filp, sctx->send_buf, sctx->send_size, |