diff options
Diffstat (limited to 'fs/ubifs/ubifs.h')
| -rw-r--r-- | fs/ubifs/ubifs.h | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index ce8654928aa..8513239ea8a 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -142,6 +142,9 @@ /* Maximum expected tree height for use by bottom_up_buf */ #define BOTTOM_UP_HEIGHT 64 +/* Maximum number of data nodes to bulk-read */ +#define UBIFS_MAX_BULK_READ 32 + /* * Lockdep classes for UBIFS inode @ui_mutex. */ @@ -329,8 +332,8 @@ struct ubifs_gced_idx_leb { * @dirty: non-zero if the inode is dirty * @xattr: non-zero if this is an extended attribute inode * @ui_mutex: serializes inode write-back with the rest of VFS operations, - * serializes "clean <-> dirty" state changes, protects @dirty, - * @ui_size, and @xattr_size + * serializes "clean <-> dirty" state changes, serializes bulk-read, + * protects @dirty, @ui_size, and @xattr_size * @ui_lock: protects @synced_i_size * @synced_i_size: synchronized size of inode, i.e. the value of inode size * currently stored on the flash; used only for regular file @@ -338,6 +341,9 @@ struct ubifs_gced_idx_leb { * @ui_size: inode size used by UBIFS when writing to flash * @flags: inode flags (@UBIFS_COMPR_FL, etc) * @compr_type: default compression type used for this inode + * @last_page_read: page number of last page read (for bulk read) + * @read_in_a_row: number of consecutive pages read in a row (for bulk read) + * @bulk_read: indicates whether bulk-read should be used * @data_len: length of the data attached to the inode * @data: inode's data * @@ -385,6 +391,9 @@ struct ubifs_inode { loff_t ui_size; int flags; int compr_type; + pgoff_t last_page_read; + pgoff_t read_in_a_row; + int bulk_read; int data_len; void *data; }; @@ -744,6 +753,28 @@ struct ubifs_znode { }; /** + * struct bu_info - bulk-read information + * @key: first data node key + * @zbranch: zbranches of data nodes to bulk read + * @buf: buffer to read into + * @buf_len: buffer length + * @gc_seq: GC sequence number to detect races with GC + * @cnt: number of data nodes for bulk read + * @blk_cnt: number of data blocks including holes + * @oef: end of file reached + */ +struct bu_info { + union ubifs_key key; + struct ubifs_zbranch zbranch[UBIFS_MAX_BULK_READ]; + void *buf; + int buf_len; + int gc_seq; + int cnt; + int blk_cnt; + int eof; +}; + +/** * struct ubifs_node_range - node length range description data structure. * @len: fixed node length * @min_len: minimum possible node length @@ -862,9 +893,11 @@ struct ubifs_orphan { /** * struct ubifs_mount_opts - UBIFS-specific mount options information. * @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast) + * @bulk_read: enable bulk-reads */ struct ubifs_mount_opts { unsigned int unmount_mode:2; + unsigned int bulk_read:2; }; /** @@ -965,6 +998,9 @@ struct ubifs_mount_opts { * @old_leb_cnt: count of logical eraseblocks before re-size * @ro_media: the underlying UBI volume is read-only * + * @bulk_read: enable bulk-reads + * @bulk_read_buf_size: buffer size for bulk-reads + * * @dirty_pg_cnt: number of dirty pages (not used) * @dirty_zn_cnt: number of dirty znodes * @clean_zn_cnt: number of clean znodes @@ -1205,6 +1241,9 @@ struct ubifs_info { int old_leb_cnt; int ro_media; + int bulk_read; + int bulk_read_buf_size; + atomic_long_t dirty_pg_cnt; atomic_long_t dirty_zn_cnt; atomic_long_t clean_zn_cnt; @@ -1490,6 +1529,8 @@ void destroy_old_idx(struct ubifs_info *c); int is_idx_node_in_tnc(struct ubifs_info *c, union ubifs_key *key, int level, int lnum, int offs); int insert_old_idx_znode(struct ubifs_info *c, struct ubifs_znode *znode); +int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu); +int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu); /* tnc_misc.c */ struct ubifs_znode *ubifs_tnc_levelorder_next(struct ubifs_znode *zr, |