nilfs2: move log writer onto nilfs object
Log writer is held by the nilfs_sb_info structure. This moves it into nilfs object and replaces all uses of NILFS_SC() accessor. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>wifi-calibration
Ryusuke Konishi
parent
9b1fc4e497
commit
3fd3fe5aea
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@ -28,7 +28,6 @@
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#include <linux/fs.h>
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struct the_nilfs;
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struct nilfs_sc_info;
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/*
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* NILFS super-block data in memory
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@ -37,9 +36,6 @@ struct nilfs_sb_info {
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/* Fundamental members */
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struct super_block *s_super; /* reverse pointer to super_block */
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struct the_nilfs *s_nilfs;
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/* Segment constructor */
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struct nilfs_sc_info *s_sc_info; /* segment constructor info */
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};
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static inline struct nilfs_sb_info *NILFS_SB(struct super_block *sb)
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@ -47,9 +43,4 @@ static inline struct nilfs_sb_info *NILFS_SB(struct super_block *sb)
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return sb->s_fs_info;
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}
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static inline struct nilfs_sc_info *NILFS_SC(struct nilfs_sb_info *sbi)
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{
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return sbi->s_sc_info;
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}
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#endif /* _NILFS_SB */
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@ -224,8 +224,7 @@ int nilfs_transaction_begin(struct super_block *sb,
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int nilfs_transaction_commit(struct super_block *sb)
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{
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struct nilfs_transaction_info *ti = current->journal_info;
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struct nilfs_sb_info *sbi;
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struct nilfs_sc_info *sci;
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struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
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int err = 0;
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BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC);
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@ -234,16 +233,15 @@ int nilfs_transaction_commit(struct super_block *sb)
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ti->ti_count--;
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return 0;
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}
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sbi = NILFS_SB(sb);
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sci = NILFS_SC(sbi);
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if (sci != NULL) {
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if (nilfs->ns_writer) {
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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if (ti->ti_flags & NILFS_TI_COMMIT)
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nilfs_segctor_start_timer(sci);
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if (atomic_read(&sbi->s_nilfs->ns_ndirtyblks) >
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sci->sc_watermark)
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if (atomic_read(&nilfs->ns_ndirtyblks) > sci->sc_watermark)
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nilfs_segctor_do_flush(sci, 0);
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}
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up_read(&sbi->s_nilfs->ns_segctor_sem);
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up_read(&nilfs->ns_segctor_sem);
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current->journal_info = ti->ti_save;
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if (ti->ti_flags & NILFS_TI_SYNC)
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@ -271,9 +269,8 @@ void nilfs_transaction_abort(struct super_block *sb)
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void nilfs_relax_pressure_in_lock(struct super_block *sb)
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{
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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struct nilfs_sc_info *sci = NILFS_SC(sbi);
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struct the_nilfs *nilfs = sbi->s_nilfs;
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struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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if (!sci || !sci->sc_flush_request)
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return;
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@ -298,6 +295,8 @@ static void nilfs_transaction_lock(struct nilfs_sb_info *sbi,
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int gcflag)
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{
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struct nilfs_transaction_info *cur_ti = current->journal_info;
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struct the_nilfs *nilfs = sbi->s_nilfs;
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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WARN_ON(cur_ti);
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ti->ti_flags = NILFS_TI_WRITER;
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@ -308,11 +307,11 @@ static void nilfs_transaction_lock(struct nilfs_sb_info *sbi,
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current->journal_info = ti;
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for (;;) {
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down_write(&sbi->s_nilfs->ns_segctor_sem);
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if (!test_bit(NILFS_SC_PRIOR_FLUSH, &NILFS_SC(sbi)->sc_flags))
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down_write(&nilfs->ns_segctor_sem);
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if (!test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags))
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break;
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nilfs_segctor_do_immediate_flush(NILFS_SC(sbi));
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nilfs_segctor_do_immediate_flush(sci);
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up_write(&sbi->s_nilfs->ns_segctor_sem);
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yield();
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@ -2169,8 +2168,8 @@ static void nilfs_segctor_do_flush(struct nilfs_sc_info *sci, int bn)
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*/
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void nilfs_flush_segment(struct super_block *sb, ino_t ino)
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{
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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struct nilfs_sc_info *sci = NILFS_SC(sbi);
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struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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if (!sci || nilfs_doing_construction())
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return;
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@ -2259,8 +2258,8 @@ static void nilfs_segctor_wakeup(struct nilfs_sc_info *sci, int err)
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*/
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int nilfs_construct_segment(struct super_block *sb)
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{
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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struct nilfs_sc_info *sci = NILFS_SC(sbi);
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struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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struct nilfs_transaction_info *ti;
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int err;
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@ -2299,7 +2298,7 @@ int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode,
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{
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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struct the_nilfs *nilfs = sbi->s_nilfs;
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struct nilfs_sc_info *sci = NILFS_SC(sbi);
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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struct nilfs_inode_info *ii;
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struct nilfs_transaction_info ti;
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int err = 0;
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@ -2445,8 +2444,8 @@ int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv,
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void **kbufs)
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{
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struct nilfs_sb_info *sbi = NILFS_SB(sb);
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struct nilfs_sc_info *sci = NILFS_SC(sbi);
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struct the_nilfs *nilfs = sbi->s_nilfs;
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struct nilfs_sc_info *sci = nilfs->ns_writer;
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struct nilfs_transaction_info ti;
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int err;
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@ -2787,9 +2786,10 @@ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci)
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int nilfs_attach_segment_constructor(struct nilfs_sb_info *sbi,
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struct nilfs_root *root)
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{
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struct the_nilfs *nilfs = sbi->s_nilfs;
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int err;
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if (NILFS_SC(sbi)) {
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if (nilfs->ns_writer) {
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/*
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* This happens if the filesystem was remounted
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* read/write after nilfs_error degenerated it into a
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@ -2798,14 +2798,14 @@ int nilfs_attach_segment_constructor(struct nilfs_sb_info *sbi,
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nilfs_detach_segment_constructor(sbi);
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}
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sbi->s_sc_info = nilfs_segctor_new(sbi, root);
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if (!sbi->s_sc_info)
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nilfs->ns_writer = nilfs_segctor_new(sbi, root);
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if (!nilfs->ns_writer)
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return -ENOMEM;
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err = nilfs_segctor_start_thread(NILFS_SC(sbi));
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err = nilfs_segctor_start_thread(nilfs->ns_writer);
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if (err) {
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kfree(sbi->s_sc_info);
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sbi->s_sc_info = NULL;
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kfree(nilfs->ns_writer);
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nilfs->ns_writer = NULL;
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}
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return err;
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}
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@ -2823,9 +2823,9 @@ void nilfs_detach_segment_constructor(struct nilfs_sb_info *sbi)
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LIST_HEAD(garbage_list);
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down_write(&nilfs->ns_segctor_sem);
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if (NILFS_SC(sbi)) {
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nilfs_segctor_destroy(NILFS_SC(sbi));
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sbi->s_sc_info = NULL;
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if (nilfs->ns_writer) {
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nilfs_segctor_destroy(nilfs->ns_writer);
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nilfs->ns_writer = NULL;
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}
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/* Force to free the list of dirty files */
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@ -33,6 +33,8 @@
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#include <linux/slab.h>
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#include "sb.h"
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struct nilfs_sc_info;
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/* the_nilfs struct */
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enum {
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THE_NILFS_INIT = 0, /* Information from super_block is set */
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@ -65,7 +67,8 @@ enum {
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* @ns_last_cno: checkpoint number of the latest segment
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* @ns_prot_seq: least sequence number of segments which must not be reclaimed
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* @ns_prev_seq: base sequence number used to decide if advance log cursor
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* @ns_segctor_sem: segment constructor semaphore
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* @ns_writer: log writer
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* @ns_segctor_sem: semaphore protecting log write
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* @ns_dat: DAT file inode
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* @ns_cpfile: checkpoint file inode
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* @ns_sufile: segusage file inode
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@ -140,6 +143,7 @@ struct the_nilfs {
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u64 ns_prot_seq;
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u64 ns_prev_seq;
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struct nilfs_sc_info *ns_writer;
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struct rw_semaphore ns_segctor_sem;
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/*
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