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authorAnand Jain <anand.jain@oracle.com>2017-05-26 10:44:59 +0300
committerDavid Sterba <dsterba@suse.com>2017-06-19 19:26:00 +0300
commite1ddce71d6cab53c28353c081af7692169417d1b (patch)
tree35c8c9bde02213d854999783175de221237b5133 /fs/btrfs/compression.h
parent8140dc30a432694d851c1b24b8eda95acd494e16 (diff)
downloadlinux-e1ddce71d6cab53c28353c081af7692169417d1b.tar.xz
btrfs: reduce arguments for decompress_bio ops
struct compressed_bio pointer can be used instead. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
-rw-r--r--fs/btrfs/compression.h44
1 files changed, 40 insertions, 4 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index 39ec43ab8df1..89bcf975efb8 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -34,6 +34,45 @@
/* Maximum size of data before compression */
#define BTRFS_MAX_UNCOMPRESSED (SZ_128K)
+struct compressed_bio {
+ /* number of bios pending for this compressed extent */
+ refcount_t pending_bios;
+
+ /* the pages with the compressed data on them */
+ struct page **compressed_pages;
+
+ /* inode that owns this data */
+ struct inode *inode;
+
+ /* starting offset in the inode for our pages */
+ u64 start;
+
+ /* number of bytes in the inode we're working on */
+ unsigned long len;
+
+ /* number of bytes on disk */
+ unsigned long compressed_len;
+
+ /* the compression algorithm for this bio */
+ int compress_type;
+
+ /* number of compressed pages in the array */
+ unsigned long nr_pages;
+
+ /* IO errors */
+ int errors;
+ int mirror_num;
+
+ /* for reads, this is the bio we are copying the data into */
+ struct bio *orig_bio;
+
+ /*
+ * the start of a variable length array of checksums only
+ * used by reads
+ */
+ u32 sums;
+};
+
void btrfs_init_compress(void);
void btrfs_exit_compress(void);
@@ -78,10 +117,7 @@ struct btrfs_compress_op {
unsigned long *total_out);
int (*decompress_bio)(struct list_head *workspace,
- struct page **pages_in,
- u64 disk_start,
- struct bio *orig_bio,
- size_t srclen);
+ struct compressed_bio *cb);
int (*decompress)(struct list_head *workspace,
unsigned char *data_in,