Lines Matching defs:nilfs
18 #include "nilfs.h"
29 void nilfs_set_last_segment(struct the_nilfs *nilfs,
32 spin_lock(&nilfs->ns_last_segment_lock);
33 nilfs->ns_last_pseg = start_blocknr;
34 nilfs->ns_last_seq = seq;
35 nilfs->ns_last_cno = cno;
37 if (!nilfs_sb_dirty(nilfs)) {
38 if (nilfs->ns_prev_seq == nilfs->ns_last_seq)
41 set_nilfs_sb_dirty(nilfs);
43 nilfs->ns_prev_seq = nilfs->ns_last_seq;
46 spin_unlock(&nilfs->ns_last_segment_lock);
50 * alloc_nilfs - allocate a nilfs object
58 struct the_nilfs *nilfs;
60 nilfs = kzalloc(sizeof(*nilfs), GFP_KERNEL);
61 if (!nilfs)
64 nilfs->ns_sb = sb;
65 nilfs->ns_bdev = sb->s_bdev;
66 atomic_set(&nilfs->ns_ndirtyblks, 0);
67 init_rwsem(&nilfs->ns_sem);
68 mutex_init(&nilfs->ns_snapshot_mount_mutex);
69 INIT_LIST_HEAD(&nilfs->ns_dirty_files);
70 INIT_LIST_HEAD(&nilfs->ns_gc_inodes);
71 spin_lock_init(&nilfs->ns_inode_lock);
72 spin_lock_init(&nilfs->ns_next_gen_lock);
73 spin_lock_init(&nilfs->ns_last_segment_lock);
74 nilfs->ns_cptree = RB_ROOT;
75 spin_lock_init(&nilfs->ns_cptree_lock);
76 init_rwsem(&nilfs->ns_segctor_sem);
77 nilfs->ns_sb_update_freq = NILFS_SB_FREQ;
79 return nilfs;
83 * destroy_nilfs - destroy nilfs object
84 * @nilfs: nilfs object to be released
86 void destroy_nilfs(struct the_nilfs *nilfs)
89 if (nilfs_init(nilfs)) {
90 brelse(nilfs->ns_sbh[0]);
91 brelse(nilfs->ns_sbh[1]);
93 kfree(nilfs);
96 static int nilfs_load_super_root(struct the_nilfs *nilfs,
101 struct nilfs_super_block **sbp = nilfs->ns_sbp;
107 err = nilfs_read_super_root_block(nilfs, sr_block, &bh_sr, 1);
111 down_read(&nilfs->ns_sem);
115 up_read(&nilfs->ns_sem);
117 inode_size = nilfs->ns_inode_size;
120 err = nilfs_dat_read(sb, dat_entry_size, rawi, &nilfs->ns_dat);
125 err = nilfs_cpfile_read(sb, checkpoint_size, rawi, &nilfs->ns_cpfile);
131 &nilfs->ns_sufile);
136 nilfs->ns_nongc_ctime = le64_to_cpu(raw_sr->sr_nongc_ctime);
143 iput(nilfs->ns_cpfile);
146 iput(nilfs->ns_dat);
163 * @nilfs: nilfs object
168 * relevant information on the nilfs object preparatory for log
171 static int nilfs_store_log_cursor(struct the_nilfs *nilfs,
176 nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg);
177 nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
178 nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
180 nilfs->ns_prev_seq = nilfs->ns_last_seq;
181 nilfs->ns_seg_seq = nilfs->ns_last_seq;
182 nilfs->ns_segnum =
183 nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);
184 nilfs->ns_cno = nilfs->ns_last_cno + 1;
185 if (nilfs->ns_segnum >= nilfs->ns_nsegments) {
186 nilfs_err(nilfs->ns_sb,
188 (unsigned long long)nilfs->ns_segnum,
189 nilfs->ns_nsegments);
224 * load_nilfs - load and recover the nilfs
225 * @nilfs: the_nilfs structure to be released
232 int load_nilfs(struct the_nilfs *nilfs, struct super_block *sb)
236 int really_read_only = bdev_read_only(nilfs->ns_bdev);
237 int valid_fs = nilfs_valid_fs(nilfs);
252 err = nilfs_search_super_root(nilfs, &ri);
254 struct nilfs_super_block **sbp = nilfs->ns_sbp;
269 * relevant states of the nilfs object.
271 memcpy(sbp[0], sbp[1], nilfs->ns_sbsize);
272 nilfs->ns_crc_seed = le32_to_cpu(sbp[0]->s_crc_seed);
273 nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
280 if (blocksize != nilfs->ns_blocksize) {
283 blocksize, nilfs->ns_blocksize);
288 err = nilfs_store_log_cursor(nilfs, sbp[0]);
293 nilfs->ns_mount_state &= ~NILFS_VALID_FS;
296 err = nilfs_search_super_root(nilfs, &ri);
301 err = nilfs_load_super_root(nilfs, sb, ri.ri_super_root);
317 if (nilfs_test_opt(nilfs, NORECOVERY)) {
322 features = le64_to_cpu(nilfs->ns_sbp[0]->s_feature_compat_ro) &
338 } else if (nilfs_test_opt(nilfs, NORECOVERY)) {
345 err = nilfs_salvage_orphan_logs(nilfs, sb, &ri);
349 down_write(&nilfs->ns_sem);
350 nilfs->ns_mount_state |= NILFS_VALID_FS; /* set "clean" flag */
352 up_write(&nilfs->ns_sem);
372 nilfs_sysfs_delete_device_group(nilfs);
375 iput(nilfs->ns_cpfile);
376 iput(nilfs->ns_sufile);
377 iput(nilfs->ns_dat);
398 * @nilfs: nilfs object
401 unsigned long nilfs_nrsvsegs(struct the_nilfs *nilfs, unsigned long nsegs)
404 DIV_ROUND_UP(nsegs * nilfs->ns_r_segments_percentage,
410 * @nilfs: nilfs object
412 static u64 nilfs_max_segment_count(struct the_nilfs *nilfs)
416 do_div(max_count, nilfs->ns_blocks_per_segment);
420 void nilfs_set_nsegments(struct the_nilfs *nilfs, unsigned long nsegs)
422 nilfs->ns_nsegments = nsegs;
423 nilfs->ns_nrsvsegs = nilfs_nrsvsegs(nilfs, nsegs);
426 static int nilfs_store_disk_layout(struct the_nilfs *nilfs,
432 nilfs_err(nilfs->ns_sb,
433 "unsupported revision (superblock rev.=%d.%d, current rev.=%d.%d). Please check the version of mkfs.nilfs(2).",
439 nilfs->ns_sbsize = le16_to_cpu(sbp->s_bytes);
440 if (nilfs->ns_sbsize > BLOCK_SIZE)
443 nilfs->ns_inode_size = le16_to_cpu(sbp->s_inode_size);
444 if (nilfs->ns_inode_size > nilfs->ns_blocksize) {
445 nilfs_err(nilfs->ns_sb, "too large inode size: %d bytes",
446 nilfs->ns_inode_size);
448 } else if (nilfs->ns_inode_size < NILFS_MIN_INODE_SIZE) {
449 nilfs_err(nilfs->ns_sb, "too small inode size: %d bytes",
450 nilfs->ns_inode_size);
454 nilfs->ns_first_ino = le32_to_cpu(sbp->s_first_ino);
456 nilfs->ns_blocks_per_segment = le32_to_cpu(sbp->s_blocks_per_segment);
457 if (nilfs->ns_blocks_per_segment < NILFS_SEG_MIN_BLOCKS) {
458 nilfs_err(nilfs->ns_sb, "too short segment: %lu blocks",
459 nilfs->ns_blocks_per_segment);
463 nilfs->ns_first_data_block = le64_to_cpu(sbp->s_first_data_block);
464 nilfs->ns_r_segments_percentage =
466 if (nilfs->ns_r_segments_percentage < 1 ||
467 nilfs->ns_r_segments_percentage > 99) {
468 nilfs_err(nilfs->ns_sb,
470 nilfs->ns_r_segments_percentage);
475 if (nsegments > nilfs_max_segment_count(nilfs)) {
476 nilfs_err(nilfs->ns_sb,
479 (unsigned long long)nilfs_max_segment_count(nilfs));
483 nblocks = sb_bdev_nr_blocks(nilfs->ns_sb);
485 u64 min_block_count = nsegments * nilfs->ns_blocks_per_segment;
493 nilfs_err(nilfs->ns_sb,
501 nilfs_set_nsegments(nilfs, nsegments);
502 nilfs->ns_crc_seed = le32_to_cpu(sbp->s_crc_seed);
555 static void nilfs_release_super_block(struct the_nilfs *nilfs)
560 if (nilfs->ns_sbp[i]) {
561 brelse(nilfs->ns_sbh[i]);
562 nilfs->ns_sbh[i] = NULL;
563 nilfs->ns_sbp[i] = NULL;
568 void nilfs_fall_back_super_block(struct the_nilfs *nilfs)
570 brelse(nilfs->ns_sbh[0]);
571 nilfs->ns_sbh[0] = nilfs->ns_sbh[1];
572 nilfs->ns_sbp[0] = nilfs->ns_sbp[1];
573 nilfs->ns_sbh[1] = NULL;
574 nilfs->ns_sbp[1] = NULL;
577 void nilfs_swap_super_block(struct the_nilfs *nilfs)
579 struct buffer_head *tsbh = nilfs->ns_sbh[0];
580 struct nilfs_super_block *tsbp = nilfs->ns_sbp[0];
582 nilfs->ns_sbh[0] = nilfs->ns_sbh[1];
583 nilfs->ns_sbp[0] = nilfs->ns_sbp[1];
584 nilfs->ns_sbh[1] = tsbh;
585 nilfs->ns_sbp[1] = tsbp;
588 static int nilfs_load_super_block(struct the_nilfs *nilfs,
592 struct nilfs_super_block **sbp = nilfs->ns_sbp;
593 struct buffer_head **sbh = nilfs->ns_sbh;
594 u64 sb2off, devsize = bdev_nr_bytes(nilfs->ns_bdev);
639 nilfs_release_super_block(nilfs);
640 nilfs_err(sb, "couldn't find nilfs on the device");
649 nilfs_swap_super_block(nilfs);
651 nilfs->ns_sbwcount = 0;
652 nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
653 nilfs->ns_prot_seq = le64_to_cpu(sbp[valid[1] & !swp]->s_last_seq);
660 * @nilfs: the_nilfs structure
671 int init_nilfs(struct the_nilfs *nilfs, struct super_block *sb, char *data)
677 down_write(&nilfs->ns_sem);
685 err = nilfs_load_super_block(nilfs, sb, blocksize, &sbp);
718 nilfs_release_super_block(nilfs);
725 err = nilfs_load_super_block(nilfs, sb, blocksize, &sbp);
733 nilfs->ns_blocksize_bits = sb->s_blocksize_bits;
734 nilfs->ns_blocksize = blocksize;
736 get_random_bytes(&nilfs->ns_next_generation,
737 sizeof(nilfs->ns_next_generation));
739 err = nilfs_store_disk_layout(nilfs, sbp);
745 nilfs->ns_mount_state = le16_to_cpu(sbp->s_state);
747 err = nilfs_store_log_cursor(nilfs, sbp);
751 set_nilfs_init(nilfs);
754 up_write(&nilfs->ns_sem);
758 nilfs_release_super_block(nilfs);
762 int nilfs_discard_segments(struct the_nilfs *nilfs, __u64 *segnump,
771 sects_per_block = (1 << nilfs->ns_blocksize_bits) /
772 bdev_logical_block_size(nilfs->ns_bdev);
774 nilfs_get_segment_range(nilfs, *sn, &seg_start, &seg_end);
782 ret = blkdev_issue_discard(nilfs->ns_bdev,
792 ret = blkdev_issue_discard(nilfs->ns_bdev,
799 int nilfs_count_free_blocks(struct the_nilfs *nilfs, sector_t *nblocks)
803 ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
804 *nblocks = (sector_t)ncleansegs * nilfs->ns_blocks_per_segment;
808 int nilfs_near_disk_full(struct the_nilfs *nilfs)
812 ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
813 nincsegs = atomic_read(&nilfs->ns_ndirtyblks) /
814 nilfs->ns_blocks_per_segment + 1;
816 return ncleansegs <= nilfs->ns_nrsvsegs + nincsegs;
819 struct nilfs_root *nilfs_lookup_root(struct the_nilfs *nilfs, __u64 cno)
824 spin_lock(&nilfs->ns_cptree_lock);
825 n = nilfs->ns_cptree.rb_node;
835 spin_unlock(&nilfs->ns_cptree_lock);
839 spin_unlock(&nilfs->ns_cptree_lock);
845 nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno)
851 root = nilfs_lookup_root(nilfs, cno);
859 spin_lock(&nilfs->ns_cptree_lock);
861 p = &nilfs->ns_cptree.rb_node;
874 spin_unlock(&nilfs->ns_cptree_lock);
882 new->nilfs = nilfs;
888 rb_insert_color(&new->rb_node, &nilfs->ns_cptree);
890 spin_unlock(&nilfs->ns_cptree_lock);
903 struct the_nilfs *nilfs = root->nilfs;
905 if (refcount_dec_and_lock(&root->count, &nilfs->ns_cptree_lock)) {
906 rb_erase(&root->rb_node, &nilfs->ns_cptree);
907 spin_unlock(&nilfs->ns_cptree_lock);