[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/nilfs2/segment.h b/ap/os/linux/linux-3.4.x/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/workqueue.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_iput_queue: list of inodes for which iput should be done
+ * @sc_iput_work: work struct to defer iput call
+ * @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;
+ struct list_head sc_iput_queue;
+ struct work_struct sc_iput_work;
+
+ __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 */