Lines Matching +full:super +full:- +full:set
1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
14 #include <linux/backing-dev.h>
31 spin_lock(&nilfs->ns_last_segment_lock);
32 nilfs->ns_last_pseg = start_blocknr;
33 nilfs->ns_last_seq = seq;
34 nilfs->ns_last_cno = cno;
37 if (nilfs->ns_prev_seq == nilfs->ns_last_seq)
42 nilfs->ns_prev_seq = nilfs->ns_last_seq;
45 spin_unlock(&nilfs->ns_last_segment_lock);
49 * alloc_nilfs - allocate a nilfs object
50 * @sb: super block instance
63 nilfs->ns_sb = sb;
64 nilfs->ns_bdev = sb->s_bdev;
65 atomic_set(&nilfs->ns_ndirtyblks, 0);
66 init_rwsem(&nilfs->ns_sem);
67 mutex_init(&nilfs->ns_snapshot_mount_mutex);
68 INIT_LIST_HEAD(&nilfs->ns_dirty_files);
69 INIT_LIST_HEAD(&nilfs->ns_gc_inodes);
70 spin_lock_init(&nilfs->ns_inode_lock);
71 spin_lock_init(&nilfs->ns_last_segment_lock);
72 nilfs->ns_cptree = RB_ROOT;
73 spin_lock_init(&nilfs->ns_cptree_lock);
74 init_rwsem(&nilfs->ns_segctor_sem);
75 nilfs->ns_sb_update_freq = NILFS_SB_FREQ;
81 * destroy_nilfs - destroy nilfs object
88 brelse(nilfs->ns_sbh[0]);
89 brelse(nilfs->ns_sbh[1]);
99 struct nilfs_super_block **sbp = nilfs->ns_sbp;
109 down_read(&nilfs->ns_sem);
110 dat_entry_size = le16_to_cpu(sbp[0]->s_dat_entry_size);
111 checkpoint_size = le16_to_cpu(sbp[0]->s_checkpoint_size);
112 segment_usage_size = le16_to_cpu(sbp[0]->s_segment_usage_size);
113 up_read(&nilfs->ns_sem);
115 inode_size = nilfs->ns_inode_size;
117 rawi = (void *)bh_sr->b_data + NILFS_SR_DAT_OFFSET(inode_size);
118 err = nilfs_dat_read(sb, dat_entry_size, rawi, &nilfs->ns_dat);
122 rawi = (void *)bh_sr->b_data + NILFS_SR_CPFILE_OFFSET(inode_size);
123 err = nilfs_cpfile_read(sb, checkpoint_size, rawi, &nilfs->ns_cpfile);
127 rawi = (void *)bh_sr->b_data + NILFS_SR_SUFILE_OFFSET(inode_size);
129 &nilfs->ns_sufile);
133 raw_sr = (struct nilfs_super_root *)bh_sr->b_data;
134 nilfs->ns_nongc_ctime = le64_to_cpu(raw_sr->sr_nongc_ctime);
141 iput(nilfs->ns_cpfile);
144 iput(nilfs->ns_dat);
151 INIT_LIST_HEAD(&ri->ri_used_segments);
156 nilfs_dispose_segment_list(&ri->ri_used_segments);
160 * nilfs_store_log_cursor - load log cursor from a super block
162 * @sbp: buffer storing super block to be read
165 * containing a super root from a given super block, and initializes
169 * Return: 0 on success, or %-EINVAL if current segment number is out
177 nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg);
178 nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
179 nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
181 nilfs->ns_prev_seq = nilfs->ns_last_seq;
182 nilfs->ns_seg_seq = nilfs->ns_last_seq;
183 nilfs->ns_segnum =
184 nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);
185 nilfs->ns_cno = nilfs->ns_last_cno + 1;
186 if (nilfs->ns_segnum >= nilfs->ns_nsegments) {
187 nilfs_err(nilfs->ns_sb,
189 (unsigned long long)nilfs->ns_segnum,
190 nilfs->ns_nsegments);
191 ret = -EINVAL;
197 * nilfs_get_blocksize - get block size from raw superblock data
198 * @sb: super block instance
206 * Return: 0 on success, or %-EINVAL if the block size is too large.
211 unsigned int shift_bits = le32_to_cpu(sbp->s_log_block_size);
214 ilog2(NILFS_MAX_BLOCK_SIZE) - BLOCK_SIZE_BITS)) {
217 return -EINVAL;
224 * load_nilfs - load and recover the nilfs
226 * @sb: super block instance used to recover past segment
228 * load_nilfs() searches and load the latest super root,
234 * * %-EINVAL - No valid segment found.
235 * * %-EIO - I/O error.
236 * * %-ENOMEM - Insufficient memory available.
237 * * %-EROFS - Read only device or RO compat mode (if recovery is required)
242 unsigned int s_flags = sb->s_flags;
243 int really_read_only = bdev_read_only(nilfs->ns_bdev);
261 struct nilfs_super_block **sbp = nilfs->ns_sbp;
264 if (err != -EINVAL)
269 "unable to fall back to spare super block");
275 * restore super block with its spare and reconfigure
278 memcpy(sbp[0], sbp[1], nilfs->ns_sbsize);
279 nilfs->ns_crc_seed = le32_to_cpu(sbp[0]->s_crc_seed);
280 nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
282 /* verify consistency between two super blocks */
287 if (blocksize != nilfs->ns_blocksize) {
289 "blocksize differs between two super blocks (%d != %d)",
290 blocksize, nilfs->ns_blocksize);
291 err = -EINVAL;
299 /* drop clean flag to allow roll-forward and recovery */
300 nilfs->ns_mount_state &= ~NILFS_VALID_FS;
310 nilfs_err(sb, "error %d while loading super root", err);
326 "norecovery option specified, skipping roll-forward recovery");
329 features = le64_to_cpu(nilfs->ns_sbp[0]->s_feature_compat_ro) &
335 err = -EROFS;
341 err = -EROFS;
344 sb->s_flags &= ~SB_RDONLY;
348 err = -EINVAL;
356 down_write(&nilfs->ns_sem);
357 nilfs->ns_mount_state |= NILFS_VALID_FS; /* set "clean" flag */
359 up_write(&nilfs->ns_sem);
363 "error %d updating super block. recovery unfinished.",
371 sb->s_flags = s_flags;
375 nilfs_err(sb, "error %d while searching super root", err);
382 iput(nilfs->ns_cpfile);
383 iput(nilfs->ns_sufile);
384 iput(nilfs->ns_dat);
388 sb->s_flags = s_flags;
399 res = min_t(unsigned long long, res, (1ULL << max_bits) - 1);
404 * nilfs_nrsvsegs - calculate the number of reserved segments
413 DIV_ROUND_UP(nsegs * nilfs->ns_r_segments_percentage,
418 * nilfs_max_segment_count - calculate the maximum number of segments
427 max_count = div64_ul(max_count, nilfs->ns_blocks_per_segment);
433 nilfs->ns_nsegments = nsegs;
434 nilfs->ns_nrsvsegs = nilfs_nrsvsegs(nilfs, nsegs);
442 if (le32_to_cpu(sbp->s_rev_level) < NILFS_MIN_SUPP_REV) {
443 nilfs_err(nilfs->ns_sb,
445 le32_to_cpu(sbp->s_rev_level),
446 le16_to_cpu(sbp->s_minor_rev_level),
448 return -EINVAL;
450 nilfs->ns_sbsize = le16_to_cpu(sbp->s_bytes);
451 if (nilfs->ns_sbsize > BLOCK_SIZE)
452 return -EINVAL;
454 nilfs->ns_inode_size = le16_to_cpu(sbp->s_inode_size);
455 if (nilfs->ns_inode_size > nilfs->ns_blocksize) {
456 nilfs_err(nilfs->ns_sb, "too large inode size: %d bytes",
457 nilfs->ns_inode_size);
458 return -EINVAL;
459 } else if (nilfs->ns_inode_size < NILFS_MIN_INODE_SIZE) {
460 nilfs_err(nilfs->ns_sb, "too small inode size: %d bytes",
461 nilfs->ns_inode_size);
462 return -EINVAL;
465 nilfs->ns_first_ino = le32_to_cpu(sbp->s_first_ino);
466 if (nilfs->ns_first_ino < NILFS_USER_INO) {
467 nilfs_err(nilfs->ns_sb,
468 "too small lower limit for non-reserved inode numbers: %u",
469 nilfs->ns_first_ino);
470 return -EINVAL;
473 nilfs->ns_blocks_per_segment = le32_to_cpu(sbp->s_blocks_per_segment);
474 if (nilfs->ns_blocks_per_segment < NILFS_SEG_MIN_BLOCKS) {
475 nilfs_err(nilfs->ns_sb, "too short segment: %lu blocks",
476 nilfs->ns_blocks_per_segment);
477 return -EINVAL;
480 nilfs->ns_first_data_block = le64_to_cpu(sbp->s_first_data_block);
481 nilfs->ns_r_segments_percentage =
482 le32_to_cpu(sbp->s_r_segments_percentage);
483 if (nilfs->ns_r_segments_percentage < 1 ||
484 nilfs->ns_r_segments_percentage > 99) {
485 nilfs_err(nilfs->ns_sb,
487 nilfs->ns_r_segments_percentage);
488 return -EINVAL;
491 nsegments = le64_to_cpu(sbp->s_nsegments);
493 nilfs_err(nilfs->ns_sb,
497 return -EINVAL;
500 nblocks = sb_bdev_nr_blocks(nilfs->ns_sb);
502 u64 min_block_count = nsegments * nilfs->ns_blocks_per_segment;
510 nilfs_err(nilfs->ns_sb,
514 return -EINVAL;
519 nilfs->ns_crc_seed = le32_to_cpu(sbp->s_crc_seed);
530 if (!sbp || le16_to_cpu(sbp->s_magic) != NILFS_SUPER_MAGIC)
532 bytes = le16_to_cpu(sbp->s_bytes);
535 crc = crc32_le(le32_to_cpu(sbp->s_crc_seed), (unsigned char *)sbp,
539 bytes - sumoff - 4);
540 return crc == le32_to_cpu(sbp->s_sum);
544 * nilfs_sb2_bad_offset - check the location of the second superblock
558 unsigned int shift_bits = le32_to_cpu(sbp->s_log_block_size);
559 u32 blocks_per_segment = le32_to_cpu(sbp->s_blocks_per_segment);
560 u64 nsegments = le64_to_cpu(sbp->s_nsegments);
564 shift_bits > ilog2(NILFS_MAX_BLOCK_SIZE) - BLOCK_SIZE_BITS)
577 if (nilfs->ns_sbp[i]) {
578 brelse(nilfs->ns_sbh[i]);
579 nilfs->ns_sbh[i] = NULL;
580 nilfs->ns_sbp[i] = NULL;
587 brelse(nilfs->ns_sbh[0]);
588 nilfs->ns_sbh[0] = nilfs->ns_sbh[1];
589 nilfs->ns_sbp[0] = nilfs->ns_sbp[1];
590 nilfs->ns_sbh[1] = NULL;
591 nilfs->ns_sbp[1] = NULL;
596 struct buffer_head *tsbh = nilfs->ns_sbh[0];
597 struct nilfs_super_block *tsbp = nilfs->ns_sbp[0];
599 nilfs->ns_sbh[0] = nilfs->ns_sbh[1];
600 nilfs->ns_sbp[0] = nilfs->ns_sbp[1];
601 nilfs->ns_sbh[1] = tsbh;
602 nilfs->ns_sbp[1] = tsbp;
609 struct nilfs_super_block **sbp = nilfs->ns_sbp;
610 struct buffer_head **sbh = nilfs->ns_sbh;
611 u64 sb2off, devsize = bdev_nr_bytes(nilfs->ns_bdev);
616 return -EINVAL;
627 return -EIO;
639 * Compare two super blocks and set 1 in swp if the secondary
640 * super block is valid and newer. Otherwise, set 0 in swp.
645 le64_to_cpu(sbp[1]->s_last_cno) >
646 le64_to_cpu(sbp[0]->s_last_cno));
658 return -EINVAL;
670 * If one has been dropped, set index 0 pointing to the remaining one,
671 * otherwise set index 1 pointing to the old one (including if both
674 * Divided case valid[0] valid[1] swp -> older
675 * -------------------------------------------------------------
684 nilfs->ns_sbwcount = 0;
685 nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
686 nilfs->ns_prot_seq = le64_to_cpu(sbp[older]->s_last_seq);
692 * init_nilfs - initialize a NILFS instance.
694 * @sb: super block
697 * reading the super block, getting disk layout information, initializing
708 down_write(&nilfs->ns_sem);
712 nilfs_err(sb, "unable to set blocksize");
713 err = -EINVAL;
736 err = -EINVAL;
739 if (sb->s_blocksize != blocksize) {
740 int hw_blocksize = bdev_logical_block_size(sb->s_bdev);
744 "blocksize %d too small for device (sector-size = %d)",
746 err = -EINVAL;
752 err = -EINVAL;
764 nilfs->ns_blocksize_bits = sb->s_blocksize_bits;
765 nilfs->ns_blocksize = blocksize;
771 sb->s_maxbytes = nilfs_max_size(sb->s_blocksize_bits);
773 nilfs->ns_mount_state = le16_to_cpu(sbp->s_state);
782 up_write(&nilfs->ns_sem);
799 sects_per_block = (1 << nilfs->ns_blocksize_bits) /
800 bdev_logical_block_size(nilfs->ns_bdev);
806 nblocks = seg_end - seg_start + 1;
808 nblocks += seg_end - seg_start + 1;
810 ret = blkdev_issue_discard(nilfs->ns_bdev,
820 ret = blkdev_issue_discard(nilfs->ns_bdev,
831 ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
832 *nblocks = (sector_t)ncleansegs * nilfs->ns_blocks_per_segment;
840 ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
841 nincsegs = atomic_read(&nilfs->ns_ndirtyblks) /
842 nilfs->ns_blocks_per_segment + 1;
844 return ncleansegs <= nilfs->ns_nrsvsegs + nincsegs;
852 spin_lock(&nilfs->ns_cptree_lock);
853 n = nilfs->ns_cptree.rb_node;
857 if (cno < root->cno) {
858 n = n->rb_left;
859 } else if (cno > root->cno) {
860 n = n->rb_right;
862 refcount_inc(&root->count);
863 spin_unlock(&nilfs->ns_cptree_lock);
867 spin_unlock(&nilfs->ns_cptree_lock);
887 spin_lock(&nilfs->ns_cptree_lock);
889 p = &nilfs->ns_cptree.rb_node;
896 if (cno < root->cno) {
897 p = &(*p)->rb_left;
898 } else if (cno > root->cno) {
899 p = &(*p)->rb_right;
901 refcount_inc(&root->count);
902 spin_unlock(&nilfs->ns_cptree_lock);
908 new->cno = cno;
909 new->ifile = NULL;
910 new->nilfs = nilfs;
911 refcount_set(&new->count, 1);
912 atomic64_set(&new->inodes_count, 0);
913 atomic64_set(&new->blocks_count, 0);
915 rb_link_node(&new->rb_node, parent, p);
916 rb_insert_color(&new->rb_node, &nilfs->ns_cptree);
918 spin_unlock(&nilfs->ns_cptree_lock);
931 struct the_nilfs *nilfs = root->nilfs;
933 if (refcount_dec_and_lock(&root->count, &nilfs->ns_cptree_lock)) {
934 rb_erase(&root->rb_node, &nilfs->ns_cptree);
935 spin_unlock(&nilfs->ns_cptree_lock);
938 iput(root->ifile);