init_rwsem(&nilfs->ns_writer_sem);
INIT_LIST_HEAD(&nilfs->ns_list);
INIT_LIST_HEAD(&nilfs->ns_supers);
+ INIT_LIST_HEAD(&nilfs->ns_gc_inodes);
spin_lock_init(&nilfs->ns_last_segment_lock);
- nilfs->ns_gc_inodes_h = NULL;
+ nilfs->ns_cptree = RB_ROOT;
+ spin_lock_init(&nilfs->ns_cptree_lock);
init_rwsem(&nilfs->ns_segctor_sem);
return nilfs;
nilfs_mdt_destroy(nilfs->ns_gc_dat);
}
if (nilfs_init(nilfs)) {
- nilfs_destroy_gccache(nilfs);
brelse(nilfs->ns_sbh[0]);
brelse(nilfs->ns_sbh[1]);
}
static int nilfs_store_disk_layout(struct the_nilfs *nilfs,
struct nilfs_super_block *sbp)
{
- if (le32_to_cpu(sbp->s_rev_level) != NILFS_CURRENT_REV) {
- printk(KERN_ERR "NILFS: revision mismatch "
+ if (le32_to_cpu(sbp->s_rev_level) < NILFS_MIN_SUPP_REV) {
+ printk(KERN_ERR "NILFS: unsupported revision "
"(superblock rev.=%d.%d, current rev.=%d.%d). "
"Please check the version of mkfs.nilfs.\n",
le32_to_cpu(sbp->s_rev_level),
if (err)
goto failed_sbh;
- /* Initialize gcinode cache */
- err = nilfs_init_gccache(nilfs);
- if (err)
- goto failed_sbh;
-
set_nilfs_init(nilfs);
err = 0;
out:
return ncleansegs <= nilfs->ns_nrsvsegs + nincsegs;
}
+struct nilfs_root *nilfs_lookup_root(struct the_nilfs *nilfs, __u64 cno)
+{
+ struct rb_node *n;
+ struct nilfs_root *root;
+
+ spin_lock(&nilfs->ns_cptree_lock);
+ n = nilfs->ns_cptree.rb_node;
+ while (n) {
+ root = rb_entry(n, struct nilfs_root, rb_node);
+
+ if (cno < root->cno) {
+ n = n->rb_left;
+ } else if (cno > root->cno) {
+ n = n->rb_right;
+ } else {
+ atomic_inc(&root->count);
+ spin_unlock(&nilfs->ns_cptree_lock);
+ return root;
+ }
+ }
+ spin_unlock(&nilfs->ns_cptree_lock);
+
+ return NULL;
+}
+
+struct nilfs_root *
+nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno)
+{
+ struct rb_node **p, *parent;
+ struct nilfs_root *root, *new;
+
+ root = nilfs_lookup_root(nilfs, cno);
+ if (root)
+ return root;
+
+ new = kmalloc(sizeof(*root), GFP_KERNEL);
+ if (!new)
+ return NULL;
+
+ spin_lock(&nilfs->ns_cptree_lock);
+
+ p = &nilfs->ns_cptree.rb_node;
+ parent = NULL;
+
+ while (*p) {
+ parent = *p;
+ root = rb_entry(parent, struct nilfs_root, rb_node);
+
+ if (cno < root->cno) {
+ p = &(*p)->rb_left;
+ } else if (cno > root->cno) {
+ p = &(*p)->rb_right;
+ } else {
+ atomic_inc(&root->count);
+ spin_unlock(&nilfs->ns_cptree_lock);
+ kfree(new);
+ return root;
+ }
+ }
+
+ new->cno = cno;
+ new->ifile = NULL;
+ new->nilfs = nilfs;
+ atomic_set(&new->count, 1);
+ atomic_set(&new->inodes_count, 0);
+ atomic_set(&new->blocks_count, 0);
+
+ rb_link_node(&new->rb_node, parent, p);
+ rb_insert_color(&new->rb_node, &nilfs->ns_cptree);
+
+ spin_unlock(&nilfs->ns_cptree_lock);
+
+ return new;
+}
+
+void nilfs_put_root(struct nilfs_root *root)
+{
+ if (atomic_dec_and_test(&root->count)) {
+ struct the_nilfs *nilfs = root->nilfs;
+
+ spin_lock(&nilfs->ns_cptree_lock);
+ rb_erase(&root->rb_node, &nilfs->ns_cptree);
+ spin_unlock(&nilfs->ns_cptree_lock);
+ if (root->ifile)
+ nilfs_mdt_destroy(root->ifile);
+
+ kfree(root);
+ }
+}
+
/**
* nilfs_find_sbinfo - find existing nilfs_sb_info structure
* @nilfs: nilfs object