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authorDennis Zhou <dennis@kernel.org>2019-02-04 15:19:57 -0500
committerDavid Sterba <dsterba@suse.com>2019-02-25 14:13:30 +0100
commit1972708a897e99b25cd7d246bd37d44a592c4b54 (patch)
treee8297f7868f6e7eb09c4fe3141cab479ee37d278 /fs/btrfs/compression.h
parent228a73abde5c04428678e917b271f8526cfd90ed (diff)
downloadlinux-1972708a897e99b25cd7d246bd37d44a592c4b54.tar.bz2
btrfs: add helpers for compression type and level
It is very easy to miss places that rely on a certain bitshifting for decoding the type_level overloading. Add helpers to do this instead. Cc: Omar Sandoval <osandov@osandov.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Dennis Zhou <dennis@kernel.org> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
-rw-r--r--fs/btrfs/compression.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index ddda9b80bf20..004db0b3111b 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -64,6 +64,16 @@ struct compressed_bio {
u32 sums;
};
+static inline unsigned int btrfs_compress_type(unsigned int type_level)
+{
+ return (type_level & 0xF);
+}
+
+static inline unsigned int btrfs_compress_level(unsigned int type_level)
+{
+ return ((type_level & 0xF0) >> 4);
+}
+
void __init btrfs_init_compress(void);
void __cold btrfs_exit_compress(void);