diff options
| -rw-r--r-- | fs/nilfs2/recovery.c | 32 | ||||
| -rw-r--r-- | fs/nilfs2/segment.c | 39 | ||||
| -rw-r--r-- | fs/nilfs2/sufile.c | 8 | ||||
| -rw-r--r-- | fs/nilfs2/super.c | 4 | ||||
| -rw-r--r-- | fs/nilfs2/the_nilfs.c | 18 | ||||
| -rw-r--r-- | fs/nilfs2/the_nilfs.h | 5 | ||||
| -rw-r--r-- | include/linux/nilfs2_fs.h | 10 |
7 files changed, 41 insertions, 75 deletions
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c index 877dc1ba23f3..a4253f34e138 100644 --- a/fs/nilfs2/recovery.c +++ b/fs/nilfs2/recovery.c @@ -416,6 +416,7 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs, struct nilfs_segment_entry *ent, *n; struct inode *sufile = nilfs->ns_sufile; __u64 segnum[4]; + time_t mtime; int err; int i; @@ -442,9 +443,9 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs, /* * Collecting segments written after the latest super root. - * These are marked volatile active, and won't be reallocated in - * the next construction. + * These are marked dirty to avoid being reallocated in the next write. */ + mtime = get_seconds(); list_for_each_entry_safe(ent, n, head, list) { if (ent->segnum == segnum[0]) { list_del(&ent->list); @@ -454,17 +455,16 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs, err = nilfs_open_segment_entry(ent, sufile); if (unlikely(err)) goto failed; - if (nilfs_segment_usage_clean(ent->raw_su)) { - nilfs_segment_usage_set_volatile_active(ent->raw_su); - /* Keep it open */ - } else { - /* Removing duplicated entries */ - list_del(&ent->list); - nilfs_close_segment_entry(ent, sufile); - nilfs_free_segment_entry(ent); + if (!nilfs_segment_usage_dirty(ent->raw_su)) { + /* make the segment garbage */ + ent->raw_su->su_nblocks = cpu_to_le32(0); + ent->raw_su->su_lastmod = cpu_to_le32(mtime); + nilfs_segment_usage_set_dirty(ent->raw_su); } + list_del(&ent->list); + nilfs_close_segment_entry(ent, sufile); + nilfs_free_segment_entry(ent); } - list_splice_init(head, nilfs->ns_used_segments.prev); /* * The segment having the latest super root is active, and @@ -882,10 +882,12 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, if (scan_newer) ri->ri_need_recovery = NILFS_RECOVERY_SR_UPDATED; - else if (nilfs->ns_mount_state & NILFS_VALID_FS) - goto super_root_found; - - scan_newer = 1; + else { + nilfs->ns_prot_seq = ssi.seg_seq; + if (nilfs->ns_mount_state & NILFS_VALID_FS) + goto super_root_found; + scan_newer = 1; + } /* reset region for roll-forward */ pseg_start += ssi.nblocks; diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 5db12d774a03..24d0fbd4271c 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -2229,13 +2229,6 @@ static void nilfs_segctor_reactivate_segments(struct nilfs_sc_info *sci, nilfs_segment_usage_set_active(ent->raw_su); nilfs_close_segment_entry(ent, sufile); } - - down_write(&nilfs->ns_sem); - head = &nilfs->ns_used_segments; - list_for_each_entry(ent, head, list) { - nilfs_segment_usage_set_volatile_active(ent->raw_su); - } - up_write(&nilfs->ns_sem); } static int nilfs_segctor_deactivate_segments(struct nilfs_sc_info *sci, @@ -2244,7 +2237,6 @@ static int nilfs_segctor_deactivate_segments(struct nilfs_sc_info *sci, struct nilfs_segment_buffer *segbuf, *last; struct nilfs_segment_entry *ent; struct inode *sufile = nilfs->ns_sufile; - struct list_head *head; int err; last = NILFS_LAST_SEGBUF(&sci->sc_segbufs); @@ -2265,22 +2257,13 @@ static int nilfs_segctor_deactivate_segments(struct nilfs_sc_info *sci, BUG_ON(!buffer_dirty(ent->bh_su)); } - head = &sci->sc_active_segments; - list_for_each_entry(ent, head, list) { + list_for_each_entry(ent, &sci->sc_active_segments, list) { err = nilfs_open_segment_entry(ent, sufile); if (unlikely(err)) goto failed; nilfs_segment_usage_clear_active(ent->raw_su); BUG_ON(!buffer_dirty(ent->bh_su)); } - - down_write(&nilfs->ns_sem); - head = &nilfs->ns_used_segments; - list_for_each_entry(ent, head, list) { - /* clear volatile active for segments of older generations */ - nilfs_segment_usage_clear_volatile_active(ent->raw_su); - } - up_write(&nilfs->ns_sem); return 0; failed: @@ -2304,19 +2287,15 @@ static void nilfs_segctor_bead_completed_segments(struct nilfs_sc_info *sci) } } -static void -__nilfs_segctor_commit_deactivate_segments(struct nilfs_sc_info *sci, - struct the_nilfs *nilfs) - +static void nilfs_segctor_commit_deactivate_segments(struct nilfs_sc_info *sci, + struct the_nilfs *nilfs) { - struct nilfs_segment_entry *ent; - - list_splice_init(&sci->sc_active_segments, - nilfs->ns_used_segments.prev); + struct nilfs_segment_entry *ent, *n; - list_for_each_entry(ent, &nilfs->ns_used_segments, list) { - nilfs_segment_usage_set_volatile_active(ent->raw_su); - /* These segments are kept open */ + list_for_each_entry_safe(ent, n, &sci->sc_active_segments, list) { + list_del(&ent->list); + nilfs_close_segment_entry(ent, nilfs->ns_sufile); + nilfs_free_segment_entry(ent); } } @@ -2405,8 +2384,8 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) if (has_sr) { down_write(&nilfs->ns_sem); nilfs_update_last_segment(sbi, 1); - __nilfs_segctor_commit_deactivate_segments(sci, nilfs); up_write(&nilfs->ns_sem); + nilfs_segctor_commit_deactivate_segments(sci, nilfs); nilfs_segctor_commit_free_segments(sci); nilfs_segctor_clear_metadata_dirty(sci); } diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c index b3674a8162a1..cc714c72b138 100644 --- a/fs/nilfs2/sufile.c +++ b/fs/nilfs2/sufile.c @@ -446,6 +446,7 @@ int nilfs_sufile_get_stat(struct inode *sufile, struct nilfs_sustat *sustat) { struct buffer_head *header_bh; struct nilfs_sufile_header *header; + struct the_nilfs *nilfs = NILFS_MDT(sufile)->mi_nilfs; void *kaddr; int ret; @@ -460,8 +461,11 @@ int nilfs_sufile_get_stat(struct inode *sufile, struct nilfs_sustat *sustat) sustat->ss_nsegs = nilfs_sufile_get_nsegments(sufile); sustat->ss_ncleansegs = le64_to_cpu(header->sh_ncleansegs); sustat->ss_ndirtysegs = le64_to_cpu(header->sh_ndirtysegs); - sustat->ss_ctime = NILFS_MDT(sufile)->mi_nilfs->ns_ctime; - sustat->ss_nongc_ctime = NILFS_MDT(sufile)->mi_nilfs->ns_nongc_ctime; + sustat->ss_ctime = nilfs->ns_ctime; + sustat->ss_nongc_ctime = nilfs->ns_nongc_ctime; + spin_lock(&nilfs->ns_last_segment_lock); + sustat->ss_prot_seq = nilfs->ns_prot_seq; + spin_unlock(&nilfs->ns_last_segment_lock); kunmap_atomic(kaddr, KM_USER0); brelse(header_bh); diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 268b563d215a..2f0e9f7bf152 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -262,8 +262,10 @@ static int nilfs_sync_super(struct nilfs_sb_info *sbi) printk(KERN_ERR "NILFS: unable to write superblock (err=%d)\n", err); else { - nilfs_dispose_used_segments(nilfs); clear_nilfs_discontinued(nilfs); + spin_lock(&nilfs->ns_last_segment_lock); + nilfs->ns_prot_seq = le64_to_cpu(nilfs->ns_sbp->s_last_seq); + spin_unlock(&nilfs->ns_last_segment_lock); } return err; diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index 69b625586226..661ab762d765 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -71,7 +71,6 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev) INIT_LIST_HEAD(&nilfs->ns_supers); spin_lock_init(&nilfs->ns_last_segment_lock); nilfs->ns_gc_inodes_h = NULL; - INIT_LIST_HEAD(&nilfs->ns_used_segments); init_rwsem(&nilfs->ns_segctor_sem); return nilfs; @@ -95,7 +94,6 @@ void put_nilfs(struct the_nilfs *nilfs) */ might_sleep(); if (nilfs_loaded(nilfs)) { - nilfs_dispose_used_segments(nilfs); nilfs_mdt_clear(nilfs->ns_sufile); nilfs_mdt_destroy(nilfs->ns_sufile); nilfs_mdt_clear(nilfs->ns_cpfile); @@ -463,22 +461,6 @@ int nilfs_count_free_blocks(struct the_nilfs *nilfs, sector_t *nblocks) return err; } -void nilfs_dispose_used_segments(struct the_nilfs *nilfs) -{ - struct nilfs_segment_entry *ent, *n; - - /* nilfs->sem must be locked by the caller. */ - if (!nilfs_loaded(nilfs)) - return; - - list_for_each_entry_safe(ent, n, &nilfs->ns_used_segments, list) { - list_del_init(&ent->list); - nilfs_segment_usage_clear_volatile_active(ent->raw_su); - nilfs_close_segment_entry(ent, nilfs->ns_sufile); - nilfs_free_segment_entry(ent); - } -} - int nilfs_near_disk_full(struct the_nilfs *nilfs) { struct inode *sufile = nilfs->ns_sufile; diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index 75da37306964..af566e78f7af 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -51,7 +51,6 @@ enum { * @ns_writer_refcount: number of referrers on ns_writer * @ns_sbh: buffer head of the on-disk super block * @ns_sbp: pointer to the super block data - * @ns_used_segments: list of full segments in volatile active state * @ns_supers: list of nilfs super block structs * @ns_seg_seq: segment sequence counter * @ns_segnum: index number of the latest full segment. @@ -65,6 +64,7 @@ enum { * @ns_last_pseg: start block number of the latest segment * @ns_last_seq: sequence value of the latest segment * @ns_last_cno: checkpoint number of the latest segment + * @ns_prot_seq: least sequence number of segments which must not be reclaimed * @ns_free_segments_count: counter of free segments * @ns_segctor_sem: segment constructor semaphore * @ns_dat: DAT file inode @@ -103,7 +103,6 @@ struct the_nilfs { */ struct buffer_head *ns_sbh; struct nilfs_super_block *ns_sbp; - struct list_head ns_used_segments; unsigned ns_mount_state; struct list_head ns_supers; @@ -132,6 +131,7 @@ struct the_nilfs { sector_t ns_last_pseg; u64 ns_last_seq; __u64 ns_last_cno; + u64 ns_prot_seq; unsigned long ns_free_segments_count; struct rw_semaphore ns_segctor_sem; @@ -188,7 +188,6 @@ void put_nilfs(struct the_nilfs *); int init_nilfs(struct the_nilfs *, struct nilfs_sb_info *, char *); int load_nilfs(struct the_nilfs *, struct nilfs_sb_info *); int nilfs_count_free_blocks(struct the_nilfs *, sector_t *); -void nilfs_dispose_used_segments(struct the_nilfs *); int nilfs_checkpoint_is_mounted(struct the_nilfs *, __u64, int); int nilfs_near_disk_full(struct the_nilfs *); diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h index 306c446e694e..aa93f0ee29d4 100644 --- a/include/linux/nilfs2_fs.h +++ b/include/linux/nilfs2_fs.h @@ -565,8 +565,6 @@ enum { NILFS_SEGMENT_USAGE_DIRTY, NILFS_SEGMENT_USAGE_ERROR, - /* on-memory only */ - NILFS_SEGMENT_USAGE_VOLATILE_ACTIVE, /* ... */ }; @@ -594,7 +592,6 @@ nilfs_segment_usage_##name(const struct nilfs_segment_usage *su) \ NILFS_SEGMENT_USAGE_FNS(ACTIVE, active) NILFS_SEGMENT_USAGE_FNS(DIRTY, dirty) NILFS_SEGMENT_USAGE_FNS(ERROR, error) -NILFS_SEGMENT_USAGE_FNS(VOLATILE_ACTIVE, volatile_active) static inline void nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su) @@ -650,7 +647,6 @@ nilfs_suinfo_##name(const struct nilfs_suinfo *si) \ NILFS_SUINFO_FNS(ACTIVE, active) NILFS_SUINFO_FNS(DIRTY, dirty) NILFS_SUINFO_FNS(ERROR, error) -NILFS_SUINFO_FNS(VOLATILE_ACTIVE, volatile_active) static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si) { @@ -717,8 +713,9 @@ struct nilfs_cpstat { * @ss_nsegs: number of segments * @ss_ncleansegs: number of clean segments * @ss_ndirtysegs: number of dirty segments - * @ss_ctime: - * @ss_nongc_ctime: + * @ss_ctime: creation time of the last segment + * @ss_nongc_ctime: creation time of the last segment not for GC + * @ss_prot_seq: least sequence number of segments which must not be reclaimed */ struct nilfs_sustat { __u64 ss_nsegs; @@ -726,6 +723,7 @@ struct nilfs_sustat { __u64 ss_ndirtysegs; __u64 ss_ctime; __u64 ss_nongc_ctime; + __u64 ss_prot_seq; }; /** |