Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0+ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * segment.h - NILFS Segment constructor prototypes and definitions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Written by Ryusuke Konishi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #ifndef _NILFS_SEGMENT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #define _NILFS_SEGMENT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "nilfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) struct nilfs_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * struct nilfs_recovery_info - Recovery information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * @ri_need_recovery: Recovery status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * @ri_super_root: Block number of the last super root
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * @ri_ri_cno: Number of the last checkpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * @ri_lsegs_start: Region for roll-forwarding (start block number)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * @ri_lsegs_end: Region for roll-forwarding (end block number)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * @ri_lseg_start_seq: Sequence value of the segment at ri_lsegs_start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * @ri_used_segments: List of segments to be mark active
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * @ri_pseg_start: Block number of the last partial segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * @ri_seq: Sequence number on the last partial segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * @ri_segnum: Segment number on the last partial segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  * @ri_nextnum: Next segment number on the last partial segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) struct nilfs_recovery_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	int			ri_need_recovery;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	sector_t		ri_super_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	__u64			ri_cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	sector_t		ri_lsegs_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	sector_t		ri_lsegs_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	u64			ri_lsegs_start_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct list_head	ri_used_segments;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	sector_t		ri_pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	u64			ri_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	__u64			ri_segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	__u64			ri_nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) /* ri_need_recovery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define NILFS_RECOVERY_SR_UPDATED	 1  /* The super root was updated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define NILFS_RECOVERY_ROLLFORWARD_DONE	 2  /* Rollforward was carried out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * struct nilfs_cstage - Context of collection stage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * @scnt: Stage count, must be accessed via wrappers:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  *        nilfs_sc_cstage_inc(), nilfs_sc_cstage_set(), nilfs_sc_cstage_get()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  * @flags: State flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * @dirty_file_ptr: Pointer on dirty_files list, or inode of a target file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  * @gc_inode_ptr: Pointer on the list of gc-inodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) struct nilfs_cstage {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int			scnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	unsigned int		flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct nilfs_inode_info *dirty_file_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct nilfs_inode_info *gc_inode_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) struct nilfs_segment_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) struct nilfs_segsum_pointer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct buffer_head     *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned int		offset; /* offset in bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * struct nilfs_sc_info - Segment constructor information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  * @sc_super: Back pointer to super_block struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * @sc_root: root object of the current filesystem tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  * @sc_nblk_inc: Block count of current generation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  * @sc_dirty_files: List of files to be written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * @sc_gc_inodes: List of GC inodes having blocks to be written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * @sc_iput_queue: list of inodes for which iput should be done
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  * @sc_iput_work: work struct to defer iput call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  * @sc_freesegs: array of segment numbers to be freed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  * @sc_nfreesegs: number of segments on @sc_freesegs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  * @sc_dsync_inode: inode whose data pages are written for a sync operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * @sc_dsync_start: start byte offset of data pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  * @sc_dsync_end: end byte offset of data pages (inclusive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  * @sc_segbufs: List of segment buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * @sc_write_logs: List of segment buffers to hold logs under writing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * @sc_segbuf_nblocks: Number of available blocks in segment buffers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * @sc_curseg: Current segment buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * @sc_stage: Collection stage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  * @sc_finfo_ptr: pointer to the current finfo struct in the segment summary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  * @sc_binfo_ptr: pointer to the current binfo struct in the segment summary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)  * @sc_blk_cnt:	Block count of a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)  * @sc_datablk_cnt: Data block count of a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99)  * @sc_nblk_this_inc: Number of blocks included in the current logical segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)  * @sc_seg_ctime: Creation time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  * @sc_cno: checkpoint number of current log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * @sc_flags: Internal flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  * @sc_state_lock: spinlock for sc_state and so on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * @sc_state: Segctord state flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  * @sc_flush_request: inode bitmap of metadata files to be flushed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  * @sc_wait_request: Client request queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  * @sc_wait_daemon: Daemon wait queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)  * @sc_wait_task: Start/end wait queue to control segctord task
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)  * @sc_seq_request: Request counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)  * @sc_seq_accept: Accepted request count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)  * @sc_seq_done: Completion counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  * @sc_sync: Request of explicit sync operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  * @sc_interval: Timeout value of background construction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  * @sc_mjcp_freq: Frequency of creating checkpoints
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)  * @sc_lseg_stime: Start time of the latest logical segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)  * @sc_watermark: Watermark for the number of dirty buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  * @sc_timer: Timer for segctord
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  * @sc_task: current thread of segctord
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct nilfs_sc_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	struct super_block     *sc_super;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	struct nilfs_root      *sc_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	unsigned long		sc_nblk_inc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct list_head	sc_dirty_files;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	struct list_head	sc_gc_inodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct list_head	sc_iput_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct work_struct	sc_iput_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	__u64		       *sc_freesegs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	size_t			sc_nfreesegs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct nilfs_inode_info *sc_dsync_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	loff_t			sc_dsync_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	loff_t			sc_dsync_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	/* Segment buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	struct list_head	sc_segbufs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	struct list_head	sc_write_logs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	unsigned long		sc_segbuf_nblocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	struct nilfs_segment_buffer *sc_curseg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct nilfs_cstage	sc_stage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	struct nilfs_segsum_pointer sc_finfo_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	struct nilfs_segsum_pointer sc_binfo_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	unsigned long		sc_blk_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	unsigned long		sc_datablk_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	unsigned long		sc_nblk_this_inc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	time64_t		sc_seg_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	__u64			sc_cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	unsigned long		sc_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	spinlock_t		sc_state_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	unsigned long		sc_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	unsigned long		sc_flush_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	wait_queue_head_t	sc_wait_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	wait_queue_head_t	sc_wait_daemon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	wait_queue_head_t	sc_wait_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	__u32			sc_seq_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	__u32			sc_seq_accepted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	__u32			sc_seq_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	int			sc_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	unsigned long		sc_interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	unsigned long		sc_mjcp_freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	unsigned long		sc_lseg_stime;	/* in 1/HZ seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	unsigned long		sc_watermark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct timer_list	sc_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	struct task_struct     *sc_timer_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct task_struct     *sc_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* sc_flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	NILFS_SC_DIRTY,		/* One or more dirty meta-data blocks exist */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	NILFS_SC_UNCLOSED,	/* Logical segment is not closed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	NILFS_SC_SUPER_ROOT,	/* The latest segment has a super root */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	NILFS_SC_PRIOR_FLUSH,	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 				 * Requesting immediate flush without making a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 				 * checkpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	NILFS_SC_HAVE_DELTA,	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 				 * Next checkpoint will have update of files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 				 * other than DAT, cpfile, sufile, or files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 				 * moved by GC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /* sc_state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #define NILFS_SEGCTOR_QUIT	    0x0001  /* segctord is being destroyed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #define NILFS_SEGCTOR_COMMIT	    0x0004  /* committed transaction exists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)  * Constant parameters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #define NILFS_SC_CLEANUP_RETRY	    3  /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 					* Retry count of construction when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 					* destroying segctord
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 					*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)  * Default values of timeout, in seconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #define NILFS_SC_DEFAULT_TIMEOUT    5   /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 					 * Timeout value of dirty blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 					 * It triggers construction of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 					 * logical segment with a super root.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 					 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #define NILFS_SC_DEFAULT_SR_FREQ    30  /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 					 * Maximum frequency of super root
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 					 * creation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 					 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  * The default threshold amount of data, in block counts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #define NILFS_SC_DEFAULT_WATERMARK  3600
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* super.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) extern struct kmem_cache *nilfs_transaction_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* segment.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) extern void nilfs_relax_pressure_in_lock(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) extern int nilfs_construct_segment(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) extern int nilfs_construct_dsync_segment(struct super_block *, struct inode *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 					 loff_t, loff_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) extern void nilfs_flush_segment(struct super_block *, ino_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) extern int nilfs_clean_segments(struct super_block *, struct nilfs_argv *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 				void **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) int nilfs_attach_log_writer(struct super_block *sb, struct nilfs_root *root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) void nilfs_detach_log_writer(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) /* recovery.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) extern int nilfs_read_super_root_block(struct the_nilfs *, sector_t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 				       struct buffer_head **, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) extern int nilfs_search_super_root(struct the_nilfs *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 				   struct nilfs_recovery_info *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs, struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 			      struct nilfs_recovery_info *ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) extern void nilfs_dispose_segment_list(struct list_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #endif /* _NILFS_SEGMENT_H */