diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nilfs2/segbuf.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/nilfs2/segbuf.h | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/ANDROID_3.4.5/fs/nilfs2/segbuf.h b/ANDROID_3.4.5/fs/nilfs2/segbuf.h deleted file mode 100644 index b04f08cc..00000000 --- a/ANDROID_3.4.5/fs/nilfs2/segbuf.h +++ /dev/null @@ -1,184 +0,0 @@ -/* - * segbuf.h - NILFS Segment buffer prototypes and definitions - * - * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - * Written by Ryusuke Konishi <ryusuke@osrg.net> - * - */ -#ifndef _NILFS_SEGBUF_H -#define _NILFS_SEGBUF_H - -#include <linux/fs.h> -#include <linux/buffer_head.h> -#include <linux/bio.h> -#include <linux/completion.h> - -/** - * struct nilfs_segsum_info - On-memory segment summary - * @flags: Flags - * @nfinfo: Number of file information structures - * @nblocks: Number of blocks included in the partial segment - * @nsumblk: Number of summary blocks - * @sumbytes: Byte count of segment summary - * @nfileblk: Total number of file blocks - * @seg_seq: Segment sequence number - * @cno: Checkpoint number - * @ctime: Creation time - * @next: Block number of the next full segment - */ -struct nilfs_segsum_info { - unsigned int flags; - unsigned long nfinfo; - unsigned long nblocks; - unsigned long nsumblk; - unsigned long sumbytes; - unsigned long nfileblk; - u64 seg_seq; - __u64 cno; - time_t ctime; - sector_t next; -}; - -/** - * struct nilfs_segment_buffer - Segment buffer - * @sb_super: back pointer to a superblock struct - * @sb_list: List head to chain this structure - * @sb_sum: On-memory segment summary - * @sb_segnum: Index number of the full segment - * @sb_nextnum: Index number of the next full segment - * @sb_fseg_start: Start block number of the full segment - * @sb_fseg_end: End block number of the full segment - * @sb_pseg_start: Disk block number of partial segment - * @sb_rest_blocks: Number of residual blocks in the current segment - * @sb_segsum_buffers: List of buffers for segment summaries - * @sb_payload_buffers: List of buffers for segment payload - * @sb_super_root: Pointer to buffer storing a super root block (if exists) - * @sb_nbio: Number of flying bio requests - * @sb_err: I/O error status - * @sb_bio_event: Completion event of log writing - */ -struct nilfs_segment_buffer { - struct super_block *sb_super; - struct list_head sb_list; - - /* Segment information */ - struct nilfs_segsum_info sb_sum; - __u64 sb_segnum; - __u64 sb_nextnum; - sector_t sb_fseg_start, sb_fseg_end; - sector_t sb_pseg_start; - unsigned sb_rest_blocks; - - /* Buffers */ - struct list_head sb_segsum_buffers; - struct list_head sb_payload_buffers; /* including super root */ - struct buffer_head *sb_super_root; - - /* io status */ - int sb_nbio; - atomic_t sb_err; - struct completion sb_bio_event; -}; - -#define NILFS_LIST_SEGBUF(head) \ - list_entry((head), struct nilfs_segment_buffer, sb_list) -#define NILFS_NEXT_SEGBUF(segbuf) NILFS_LIST_SEGBUF((segbuf)->sb_list.next) -#define NILFS_PREV_SEGBUF(segbuf) NILFS_LIST_SEGBUF((segbuf)->sb_list.prev) -#define NILFS_LAST_SEGBUF(head) NILFS_LIST_SEGBUF((head)->prev) -#define NILFS_FIRST_SEGBUF(head) NILFS_LIST_SEGBUF((head)->next) -#define NILFS_SEGBUF_IS_LAST(segbuf, head) ((segbuf)->sb_list.next == (head)) - -#define nilfs_for_each_segbuf_before(s, t, h) \ - for ((s) = NILFS_FIRST_SEGBUF(h); (s) != (t); \ - (s) = NILFS_NEXT_SEGBUF(s)) - -#define NILFS_SEGBUF_FIRST_BH(head) \ - (list_entry((head)->next, struct buffer_head, b_assoc_buffers)) -#define NILFS_SEGBUF_NEXT_BH(bh) \ - (list_entry((bh)->b_assoc_buffers.next, struct buffer_head, \ - b_assoc_buffers)) -#define NILFS_SEGBUF_BH_IS_LAST(bh, head) ((bh)->b_assoc_buffers.next == head) - -extern struct kmem_cache *nilfs_segbuf_cachep; - -struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *); -void nilfs_segbuf_free(struct nilfs_segment_buffer *); -void nilfs_segbuf_map(struct nilfs_segment_buffer *, __u64, unsigned long, - struct the_nilfs *); -void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf, - struct nilfs_segment_buffer *prev); -void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *, __u64, - struct the_nilfs *); -int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned, time_t, __u64); -int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *); -int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *, - struct buffer_head **); -void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *); - -static inline int nilfs_segbuf_simplex(struct nilfs_segment_buffer *segbuf) -{ - unsigned int flags = segbuf->sb_sum.flags; - - return (flags & (NILFS_SS_LOGBGN | NILFS_SS_LOGEND)) == - (NILFS_SS_LOGBGN | NILFS_SS_LOGEND); -} - -static inline int nilfs_segbuf_empty(struct nilfs_segment_buffer *segbuf) -{ - return segbuf->sb_sum.nblocks == segbuf->sb_sum.nsumblk; -} - -static inline void -nilfs_segbuf_add_segsum_buffer(struct nilfs_segment_buffer *segbuf, - struct buffer_head *bh) -{ - list_add_tail(&bh->b_assoc_buffers, &segbuf->sb_segsum_buffers); - segbuf->sb_sum.nblocks++; - segbuf->sb_sum.nsumblk++; -} - -static inline void -nilfs_segbuf_add_payload_buffer(struct nilfs_segment_buffer *segbuf, - struct buffer_head *bh) -{ - list_add_tail(&bh->b_assoc_buffers, &segbuf->sb_payload_buffers); - segbuf->sb_sum.nblocks++; -} - -static inline void -nilfs_segbuf_add_file_buffer(struct nilfs_segment_buffer *segbuf, - struct buffer_head *bh) -{ - get_bh(bh); - nilfs_segbuf_add_payload_buffer(segbuf, bh); - segbuf->sb_sum.nfileblk++; -} - -void nilfs_clear_logs(struct list_head *logs); -void nilfs_truncate_logs(struct list_head *logs, - struct nilfs_segment_buffer *last); -int nilfs_write_logs(struct list_head *logs, struct the_nilfs *nilfs); -int nilfs_wait_on_logs(struct list_head *logs); -void nilfs_add_checksums_on_logs(struct list_head *logs, u32 seed); - -static inline void nilfs_destroy_logs(struct list_head *logs) -{ - nilfs_truncate_logs(logs, NULL); -} - -#endif /* _NILFS_SEGBUF_H */ |