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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/nilfs2/segment.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/nilfs2/segment.h')
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diff --git a/ANDROID_3.4.5/fs/nilfs2/segment.h b/ANDROID_3.4.5/fs/nilfs2/segment.h
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-/*
- * segment.h - NILFS Segment constructor 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_SEGMENT_H
-#define _NILFS_SEGMENT_H
-
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
-#include "nilfs.h"
-
-struct nilfs_root;
-
-/**
- * struct nilfs_recovery_info - Recovery information
- * @ri_need_recovery: Recovery status
- * @ri_super_root: Block number of the last super root
- * @ri_ri_cno: Number of the last checkpoint
- * @ri_lsegs_start: Region for roll-forwarding (start block number)
- * @ri_lsegs_end: Region for roll-forwarding (end block number)
- * @ri_lseg_start_seq: Sequence value of the segment at ri_lsegs_start
- * @ri_used_segments: List of segments to be mark active
- * @ri_pseg_start: Block number of the last partial segment
- * @ri_seq: Sequence number on the last partial segment
- * @ri_segnum: Segment number on the last partial segment
- * @ri_nextnum: Next segment number on the last partial segment
- */
-struct nilfs_recovery_info {
- int ri_need_recovery;
- sector_t ri_super_root;
- __u64 ri_cno;
-
- sector_t ri_lsegs_start;
- sector_t ri_lsegs_end;
- u64 ri_lsegs_start_seq;
- struct list_head ri_used_segments;
- sector_t ri_pseg_start;
- u64 ri_seq;
- __u64 ri_segnum;
- __u64 ri_nextnum;
-};
-
-/* ri_need_recovery */
-#define NILFS_RECOVERY_SR_UPDATED 1 /* The super root was updated */
-#define NILFS_RECOVERY_ROLLFORWARD_DONE 2 /* Rollforward was carried out */
-
-/**
- * struct nilfs_cstage - Context of collection stage
- * @scnt: Stage count
- * @flags: State flags
- * @dirty_file_ptr: Pointer on dirty_files list, or inode of a target file
- * @gc_inode_ptr: Pointer on the list of gc-inodes
- */
-struct nilfs_cstage {
- int scnt;
- unsigned flags;
- struct nilfs_inode_info *dirty_file_ptr;
- struct nilfs_inode_info *gc_inode_ptr;
-};
-
-struct nilfs_segment_buffer;
-
-struct nilfs_segsum_pointer {
- struct buffer_head *bh;
- unsigned offset; /* offset in bytes */
-};
-
-/**
- * struct nilfs_sc_info - Segment constructor information
- * @sc_super: Back pointer to super_block struct
- * @sc_root: root object of the current filesystem tree
- * @sc_nblk_inc: Block count of current generation
- * @sc_dirty_files: List of files to be written
- * @sc_gc_inodes: List of GC inodes having blocks to be written
- * @sc_freesegs: array of segment numbers to be freed
- * @sc_nfreesegs: number of segments on @sc_freesegs
- * @sc_dsync_inode: inode whose data pages are written for a sync operation
- * @sc_dsync_start: start byte offset of data pages
- * @sc_dsync_end: end byte offset of data pages (inclusive)
- * @sc_segbufs: List of segment buffers
- * @sc_write_logs: List of segment buffers to hold logs under writing
- * @sc_segbuf_nblocks: Number of available blocks in segment buffers.
- * @sc_curseg: Current segment buffer
- * @sc_stage: Collection stage
- * @sc_finfo_ptr: pointer to the current finfo struct in the segment summary
- * @sc_binfo_ptr: pointer to the current binfo struct in the segment summary
- * @sc_blk_cnt: Block count of a file
- * @sc_datablk_cnt: Data block count of a file
- * @sc_nblk_this_inc: Number of blocks included in the current logical segment
- * @sc_seg_ctime: Creation time
- * @sc_cno: checkpoint number of current log
- * @sc_flags: Internal flags
- * @sc_state_lock: spinlock for sc_state and so on
- * @sc_state: Segctord state flags
- * @sc_flush_request: inode bitmap of metadata files to be flushed
- * @sc_wait_request: Client request queue
- * @sc_wait_daemon: Daemon wait queue
- * @sc_wait_task: Start/end wait queue to control segctord task
- * @sc_seq_request: Request counter
- * @sc_seq_accept: Accepted request count
- * @sc_seq_done: Completion counter
- * @sc_sync: Request of explicit sync operation
- * @sc_interval: Timeout value of background construction
- * @sc_mjcp_freq: Frequency of creating checkpoints
- * @sc_lseg_stime: Start time of the latest logical segment
- * @sc_watermark: Watermark for the number of dirty buffers
- * @sc_timer: Timer for segctord
- * @sc_task: current thread of segctord
- */
-struct nilfs_sc_info {
- struct super_block *sc_super;
- struct nilfs_root *sc_root;
-
- unsigned long sc_nblk_inc;
-
- struct list_head sc_dirty_files;
- struct list_head sc_gc_inodes;
-
- __u64 *sc_freesegs;
- size_t sc_nfreesegs;
-
- struct nilfs_inode_info *sc_dsync_inode;
- loff_t sc_dsync_start;
- loff_t sc_dsync_end;
-
- /* Segment buffers */
- struct list_head sc_segbufs;
- struct list_head sc_write_logs;
- unsigned long sc_segbuf_nblocks;
- struct nilfs_segment_buffer *sc_curseg;
-
- struct nilfs_cstage sc_stage;
-
- struct nilfs_segsum_pointer sc_finfo_ptr;
- struct nilfs_segsum_pointer sc_binfo_ptr;
- unsigned long sc_blk_cnt;
- unsigned long sc_datablk_cnt;
- unsigned long sc_nblk_this_inc;
- time_t sc_seg_ctime;
- __u64 sc_cno;
- unsigned long sc_flags;
-
- spinlock_t sc_state_lock;
- unsigned long sc_state;
- unsigned long sc_flush_request;
-
- wait_queue_head_t sc_wait_request;
- wait_queue_head_t sc_wait_daemon;
- wait_queue_head_t sc_wait_task;
-
- __u32 sc_seq_request;
- __u32 sc_seq_accepted;
- __u32 sc_seq_done;
-
- int sc_sync;
- unsigned long sc_interval;
- unsigned long sc_mjcp_freq;
- unsigned long sc_lseg_stime; /* in 1/HZ seconds */
- unsigned long sc_watermark;
-
- struct timer_list sc_timer;
- struct task_struct *sc_task;
-};
-
-/* sc_flags */
-enum {
- NILFS_SC_DIRTY, /* One or more dirty meta-data blocks exist */
- NILFS_SC_UNCLOSED, /* Logical segment is not closed */
- NILFS_SC_SUPER_ROOT, /* The latest segment has a super root */
- NILFS_SC_PRIOR_FLUSH, /* Requesting immediate flush without making a
- checkpoint */
- NILFS_SC_HAVE_DELTA, /* Next checkpoint will have update of files
- other than DAT, cpfile, sufile, or files
- moved by GC */
-};
-
-/* sc_state */
-#define NILFS_SEGCTOR_QUIT 0x0001 /* segctord is being destroyed */
-#define NILFS_SEGCTOR_COMMIT 0x0004 /* committed transaction exists */
-
-/*
- * Constant parameters
- */
-#define NILFS_SC_CLEANUP_RETRY 3 /* Retry count of construction when
- destroying segctord */
-
-/*
- * Default values of timeout, in seconds.
- */
-#define NILFS_SC_DEFAULT_TIMEOUT 5 /* Timeout value of dirty blocks.
- It triggers construction of a
- logical segment with a super root */
-#define NILFS_SC_DEFAULT_SR_FREQ 30 /* Maximum frequency of super root
- creation */
-
-/*
- * The default threshold amount of data, in block counts.
- */
-#define NILFS_SC_DEFAULT_WATERMARK 3600
-
-/* super.c */
-extern struct kmem_cache *nilfs_transaction_cachep;
-
-/* segment.c */
-extern void nilfs_relax_pressure_in_lock(struct super_block *);
-
-extern int nilfs_construct_segment(struct super_block *);
-extern int nilfs_construct_dsync_segment(struct super_block *, struct inode *,
- loff_t, loff_t);
-extern void nilfs_flush_segment(struct super_block *, ino_t);
-extern int nilfs_clean_segments(struct super_block *, struct nilfs_argv *,
- void **);
-
-int nilfs_attach_log_writer(struct super_block *sb, struct nilfs_root *root);
-void nilfs_detach_log_writer(struct super_block *sb);
-
-/* recovery.c */
-extern int nilfs_read_super_root_block(struct the_nilfs *, sector_t,
- struct buffer_head **, int);
-extern int nilfs_search_super_root(struct the_nilfs *,
- struct nilfs_recovery_info *);
-int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs, struct super_block *sb,
- struct nilfs_recovery_info *ri);
-extern void nilfs_dispose_segment_list(struct list_head *);
-
-#endif /* _NILFS_SEGMENT_H */