static LIST_HEAD(nilfs_objects);
static DEFINE_SPINLOCK(nilfs_lock);
+static int nilfs_valid_sb(struct nilfs_super_block *sbp);
+
void nilfs_set_last_segment(struct the_nilfs *nilfs,
sector_t start_blocknr, u64 seq, __u64 cno)
{
nilfs->ns_last_pseg = start_blocknr;
nilfs->ns_last_seq = seq;
nilfs->ns_last_cno = cno;
+
+ if (!nilfs_sb_dirty(nilfs)) {
+ if (nilfs->ns_prev_seq == nilfs->ns_last_seq)
+ goto stay_cursor;
+
+ set_nilfs_sb_dirty(nilfs);
+ }
+ nilfs->ns_prev_seq = nilfs->ns_last_seq;
+
+ stay_cursor:
spin_unlock(&nilfs->ns_last_segment_lock);
}
kfree(nilfs);
}
-static int nilfs_load_super_root(struct the_nilfs *nilfs,
- struct nilfs_sb_info *sbi, sector_t sr_block)
+static int nilfs_load_super_root(struct the_nilfs *nilfs, sector_t sr_block)
{
struct buffer_head *bh_sr;
struct nilfs_super_root *raw_sr;
unsigned inode_size;
int err;
- err = nilfs_read_super_root_block(sbi->s_super, sr_block, &bh_sr, 1);
+ err = nilfs_read_super_root_block(nilfs, sr_block, &bh_sr, 1);
if (unlikely(err))
return err;
nilfs_dispose_segment_list(&ri->ri_used_segments);
}
+/**
+ * nilfs_store_log_cursor - load log cursor from a super block
+ * @nilfs: nilfs object
+ * @sbp: buffer storing super block to be read
+ *
+ * nilfs_store_log_cursor() reads the last position of the log
+ * containing a super root from a given super block, and initializes
+ * relevant information on the nilfs object preparatory for log
+ * scanning and recovery.
+ */
+static int nilfs_store_log_cursor(struct the_nilfs *nilfs,
+ struct nilfs_super_block *sbp)
+{
+ int ret = 0;
+
+ nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg);
+ nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
+ nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
+
+ nilfs->ns_prev_seq = nilfs->ns_last_seq;
+ nilfs->ns_seg_seq = nilfs->ns_last_seq;
+ nilfs->ns_segnum =
+ nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);
+ nilfs->ns_cno = nilfs->ns_last_cno + 1;
+ if (nilfs->ns_segnum >= nilfs->ns_nsegments) {
+ printk(KERN_ERR "NILFS invalid last segment number.\n");
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
/**
* load_nilfs - load and recover the nilfs
* @nilfs: the_nilfs structure to be released
nilfs_init_recovery_info(&ri);
- err = nilfs_search_super_root(nilfs, sbi, &ri);
+ err = nilfs_search_super_root(nilfs, &ri);
if (unlikely(err)) {
- printk(KERN_ERR "NILFS: error searching super root.\n");
- goto failed;
+ struct nilfs_super_block **sbp = nilfs->ns_sbp;
+ int blocksize;
+
+ if (err != -EINVAL)
+ goto scan_error;
+
+ if (!nilfs_valid_sb(sbp[1])) {
+ printk(KERN_WARNING
+ "NILFS warning: unable to fall back to spare"
+ "super block\n");
+ goto scan_error;
+ }
+ printk(KERN_INFO
+ "NILFS: try rollback from an earlier position\n");
+
+ /*
+ * restore super block with its spare and reconfigure
+ * relevant states of the nilfs object.
+ */
+ memcpy(sbp[0], sbp[1], nilfs->ns_sbsize);
+ nilfs->ns_crc_seed = le32_to_cpu(sbp[0]->s_crc_seed);
+ nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
+
+ /* verify consistency between two super blocks */
+ blocksize = BLOCK_SIZE << le32_to_cpu(sbp[0]->s_log_block_size);
+ if (blocksize != nilfs->ns_blocksize) {
+ printk(KERN_WARNING
+ "NILFS warning: blocksize differs between "
+ "two super blocks (%d != %d)\n",
+ blocksize, nilfs->ns_blocksize);
+ goto scan_error;
+ }
+
+ err = nilfs_store_log_cursor(nilfs, sbp[0]);
+ if (err)
+ goto scan_error;
+
+ /* drop clean flag to allow roll-forward and recovery */
+ nilfs->ns_mount_state &= ~NILFS_VALID_FS;
+ valid_fs = 0;
+
+ err = nilfs_search_super_root(nilfs, &ri);
+ if (err)
+ goto scan_error;
}
- err = nilfs_load_super_root(nilfs, sbi, ri.ri_super_root);
+ err = nilfs_load_super_root(nilfs, ri.ri_super_root);
if (unlikely(err)) {
printk(KERN_ERR "NILFS: error loading super root.\n");
goto failed;
goto skip_recovery;
if (s_flags & MS_RDONLY) {
+ __u64 features;
+
if (nilfs_test_opt(sbi, NORECOVERY)) {
printk(KERN_INFO "NILFS: norecovery option specified. "
"skipping roll-forward recovery\n");
goto skip_recovery;
}
+ features = le64_to_cpu(nilfs->ns_sbp[0]->s_feature_compat_ro) &
+ ~NILFS_FEATURE_COMPAT_RO_SUPP;
+ if (features) {
+ printk(KERN_ERR "NILFS: couldn't proceed with "
+ "recovery because of unsupported optional "
+ "features (%llx)\n",
+ (unsigned long long)features);
+ err = -EROFS;
+ goto failed_unload;
+ }
if (really_read_only) {
printk(KERN_ERR "NILFS: write access "
"unavailable, cannot proceed.\n");
goto failed_unload;
}
- err = nilfs_recover_logical_segments(nilfs, sbi, &ri);
+ err = nilfs_salvage_orphan_logs(nilfs, sbi, &ri);
if (err)
goto failed_unload;
down_write(&nilfs->ns_sem);
- nilfs->ns_mount_state |= NILFS_VALID_FS;
- nilfs->ns_sbp[0]->s_state = cpu_to_le16(nilfs->ns_mount_state);
- err = nilfs_commit_super(sbi, 1);
+ nilfs->ns_mount_state |= NILFS_VALID_FS; /* set "clean" flag */
+ err = nilfs_cleanup_super(sbi);
up_write(&nilfs->ns_sem);
if (err) {
sbi->s_super->s_flags = s_flags;
return 0;
+ scan_error:
+ printk(KERN_ERR "NILFS: error searching super root.\n");
+ goto failed;
+
failed_unload:
nilfs_mdt_destroy(nilfs->ns_cpfile);
nilfs_mdt_destroy(nilfs->ns_sufile);
nilfs_swap_super_block(nilfs);
}
- nilfs->ns_sbwtime[0] = le64_to_cpu(sbp[0]->s_wtime);
- nilfs->ns_sbwtime[1] = valid[!swp] ? le64_to_cpu(sbp[1]->s_wtime) : 0;
+ nilfs->ns_sbwcount = 0;
+ nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
nilfs->ns_prot_seq = le64_to_cpu(sbp[valid[1] & !swp]->s_last_seq);
*sbpp = sbp[0];
return 0;
if (err)
goto out;
+ err = nilfs_check_feature_compatibility(sb, sbp);
+ if (err)
+ goto out;
+
blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
if (sb->s_blocksize != blocksize &&
!sb_set_blocksize(sb, blocksize)) {
goto out;
}
- blocksize = sb_min_blocksize(sb, BLOCK_SIZE);
+ blocksize = sb_min_blocksize(sb, NILFS_MIN_BLOCK_SIZE);
if (!blocksize) {
printk(KERN_ERR "NILFS: unable to set blocksize\n");
err = -EINVAL;
if (err)
goto failed_sbh;
+ err = nilfs_check_feature_compatibility(sb, sbp);
+ if (err)
+ goto failed_sbh;
+
blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
+ if (blocksize < NILFS_MIN_BLOCK_SIZE ||
+ blocksize > NILFS_MAX_BLOCK_SIZE) {
+ printk(KERN_ERR "NILFS: couldn't mount because of unsupported "
+ "filesystem blocksize %d\n", blocksize);
+ err = -EINVAL;
+ goto failed_sbh;
+ }
if (sb->s_blocksize != blocksize) {
int hw_blocksize = bdev_logical_block_size(sb->s_bdev);
when reloading fails. */
}
nilfs->ns_blocksize_bits = sb->s_blocksize_bits;
+ nilfs->ns_blocksize = blocksize;
err = nilfs_store_disk_layout(nilfs, sbp);
if (err)
bdi = nilfs->ns_bdev->bd_inode->i_mapping->backing_dev_info;
nilfs->ns_bdi = bdi ? : &default_backing_dev_info;
- /* Finding last segment */
- nilfs->ns_last_pseg = le64_to_cpu(sbp->s_last_pseg);
- nilfs->ns_last_cno = le64_to_cpu(sbp->s_last_cno);
- nilfs->ns_last_seq = le64_to_cpu(sbp->s_last_seq);
-
- nilfs->ns_seg_seq = nilfs->ns_last_seq;
- nilfs->ns_segnum =
- nilfs_get_segnum_of_block(nilfs, nilfs->ns_last_pseg);
- nilfs->ns_cno = nilfs->ns_last_cno + 1;
- if (nilfs->ns_segnum >= nilfs->ns_nsegments) {
- printk(KERN_ERR "NILFS invalid last segment number.\n");
- err = -EINVAL;
+ err = nilfs_store_log_cursor(nilfs, sbp);
+ if (err)
goto failed_sbh;
- }
- /* Dummy values */
- nilfs->ns_free_segments_count =
- nilfs->ns_nsegments - (nilfs->ns_segnum + 1);
/* Initialize gcinode cache */
err = nilfs_init_gccache(nilfs);
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff