int offset, int len)
{
struct ubi_device *ubi = vol->ubi;
- int pnum, opnum, err, vol_id = vol->vol_id;
+ int pnum, opnum, err, err2, vol_id = vol->vol_id;
pnum = ubi_wl_get_peb(ubi);
if (pnum < 0) {
out_put:
up_read(&ubi->fm_eba_sem);
- if (err && pnum >= 0)
- err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
- else if (!err && opnum >= 0)
- err = ubi_wl_put_peb(ubi, vol_id, lnum, opnum, 0);
+ if (err && pnum >= 0) {
+ err2 = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
+ if (err2) {
+ ubi_warn(ubi, "failed to return physical eraseblock %d, error %d",
+ pnum, err2);
+ }
+ } else if (!err && opnum >= 0) {
+ err2 = ubi_wl_put_peb(ubi, vol_id, lnum, opnum, 0);
+ if (err2) {
+ ubi_warn(ubi, "failed to return physical eraseblock %d, error %d",
+ opnum, err2);
+ }
+ }
return err;
}
umode_t mode = S_IFCHR | WHITEOUT_MODE;
struct inode *inode;
struct ubifs_info *c = dir->i_sb->s_fs_info;
- struct fscrypt_name nm;
/*
* Create an inode('nlink = 1') for whiteout without updating journal,
dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
dentry, mode, dir->i_ino);
- err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
- if (err)
- return ERR_PTR(err);
-
inode = ubifs_new_inode(c, dir, mode, false);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
make_bad_inode(inode);
iput(inode);
out_free:
- fscrypt_free_filename(&nm);
ubifs_err(c, "cannot create whiteout file, error %d", err);
return ERR_PTR(err);
}
unlock_2_inodes(dir, inode);
ubifs_release_budget(c, &req);
+ fscrypt_free_filename(&nm);
return finish_open_simple(file, 0);
NOT_ON_MEDIA = 3,
};
+static void do_insert_old_idx(struct ubifs_info *c,
+ struct ubifs_old_idx *old_idx)
+{
+ struct ubifs_old_idx *o;
+ struct rb_node **p, *parent = NULL;
+
+ p = &c->old_idx.rb_node;
+ while (*p) {
+ parent = *p;
+ o = rb_entry(parent, struct ubifs_old_idx, rb);
+ if (old_idx->lnum < o->lnum)
+ p = &(*p)->rb_left;
+ else if (old_idx->lnum > o->lnum)
+ p = &(*p)->rb_right;
+ else if (old_idx->offs < o->offs)
+ p = &(*p)->rb_left;
+ else if (old_idx->offs > o->offs)
+ p = &(*p)->rb_right;
+ else {
+ ubifs_err(c, "old idx added twice!");
+ kfree(old_idx);
+ }
+ }
+ rb_link_node(&old_idx->rb, parent, p);
+ rb_insert_color(&old_idx->rb, &c->old_idx);
+}
+
/**
* insert_old_idx - record an index node obsoleted since the last commit start.
* @c: UBIFS file-system description object
*/
static int insert_old_idx(struct ubifs_info *c, int lnum, int offs)
{
- struct ubifs_old_idx *old_idx, *o;
- struct rb_node **p, *parent = NULL;
+ struct ubifs_old_idx *old_idx;
old_idx = kmalloc(sizeof(struct ubifs_old_idx), GFP_NOFS);
if (unlikely(!old_idx))
return -ENOMEM;
old_idx->lnum = lnum;
old_idx->offs = offs;
+ do_insert_old_idx(c, old_idx);
- p = &c->old_idx.rb_node;
- while (*p) {
- parent = *p;
- o = rb_entry(parent, struct ubifs_old_idx, rb);
- if (lnum < o->lnum)
- p = &(*p)->rb_left;
- else if (lnum > o->lnum)
- p = &(*p)->rb_right;
- else if (offs < o->offs)
- p = &(*p)->rb_left;
- else if (offs > o->offs)
- p = &(*p)->rb_right;
- else {
- ubifs_err(c, "old idx added twice!");
- kfree(old_idx);
- return 0;
- }
- }
- rb_link_node(&old_idx->rb, parent, p);
- rb_insert_color(&old_idx->rb, &c->old_idx);
return 0;
}
__set_bit(DIRTY_ZNODE, &zn->flags);
__clear_bit(COW_ZNODE, &zn->flags);
- ubifs_assert(c, !ubifs_zn_obsolete(znode));
- __set_bit(OBSOLETE_ZNODE, &znode->flags);
-
- if (znode->level != 0) {
- int i;
- const int n = zn->child_cnt;
-
- /* The children now have new parent */
- for (i = 0; i < n; i++) {
- struct ubifs_zbranch *zbr = &zn->zbranch[i];
-
- if (zbr->znode)
- zbr->znode->parent = zn;
- }
- }
-
- atomic_long_inc(&c->dirty_zn_cnt);
return zn;
}
}
/**
+ * replace_znode - replace old znode with new znode.
+ * @c: UBIFS file-system description object
+ * @new_zn: new znode
+ * @old_zn: old znode
+ * @zbr: the branch of parent znode
+ *
+ * Replace old znode with new znode in TNC.
+ */
+static void replace_znode(struct ubifs_info *c, struct ubifs_znode *new_zn,
+ struct ubifs_znode *old_zn, struct ubifs_zbranch *zbr)
+{
+ ubifs_assert(c, !ubifs_zn_obsolete(old_zn));
+ __set_bit(OBSOLETE_ZNODE, &old_zn->flags);
+
+ if (old_zn->level != 0) {
+ int i;
+ const int n = new_zn->child_cnt;
+
+ /* The children now have new parent */
+ for (i = 0; i < n; i++) {
+ struct ubifs_zbranch *child = &new_zn->zbranch[i];
+
+ if (child->znode)
+ child->znode->parent = new_zn;
+ }
+ }
+
+ zbr->znode = new_zn;
+ zbr->lnum = 0;
+ zbr->offs = 0;
+ zbr->len = 0;
+
+ atomic_long_inc(&c->dirty_zn_cnt);
+}
+
+/**
* dirty_cow_znode - ensure a znode is not being committed.
* @c: UBIFS file-system description object
* @zbr: branch of znode to check
return zn;
if (zbr->len) {
- err = insert_old_idx(c, zbr->lnum, zbr->offs);
- if (unlikely(err))
- /*
- * Obsolete znodes will be freed by tnc_destroy_cnext()
- * or free_obsolete_znodes(), copied up znodes should
- * be added back to tnc and freed by
- * ubifs_destroy_tnc_subtree().
- */
+ struct ubifs_old_idx *old_idx;
+
+ old_idx = kmalloc(sizeof(struct ubifs_old_idx), GFP_NOFS);
+ if (unlikely(!old_idx)) {
+ err = -ENOMEM;
goto out;
+ }
+ old_idx->lnum = zbr->lnum;
+ old_idx->offs = zbr->offs;
+
err = add_idx_dirt(c, zbr->lnum, zbr->len);
- } else
- err = 0;
+ if (err) {
+ kfree(old_idx);
+ goto out;
+ }
-out:
- zbr->znode = zn;
- zbr->lnum = 0;
- zbr->offs = 0;
- zbr->len = 0;
+ do_insert_old_idx(c, old_idx);
+ }
+
+ replace_znode(c, zn, znode, zbr);
- if (unlikely(err))
- return ERR_PTR(err);
return zn;
+
+out:
+ kfree(zn);
+ return ERR_PTR(err);
}
/**