-/* Free dquot entry in data block */
-static int free_dqentry(struct dquot *dquot, uint blk)
-{
- struct super_block *sb = dquot->dq_sb;
- int type = dquot->dq_type;
- struct v2_disk_dqdbheader *dh;
- dqbuf_t buf = getdqbuf();
- int ret = 0;
-
- if (!buf)
- return -ENOMEM;
- if (dquot->dq_off >> V2_DQBLKSIZE_BITS != blk) {
- printk(KERN_ERR "VFS: Quota structure has offset to other "
- "block (%u) than it should (%u).\n", blk,
- (uint)(dquot->dq_off >> V2_DQBLKSIZE_BITS));
- goto out_buf;
- }
- if ((ret = read_blk(sb, type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota data block %u\n", blk);
- goto out_buf;
- }
- dh = (struct v2_disk_dqdbheader *)buf;
- le16_add_cpu(&dh->dqdh_entries, -1);
- if (!le16_to_cpu(dh->dqdh_entries)) { /* Block got free? */
- if ((ret = remove_free_dqentry(sb, type, buf, blk)) < 0 ||
- (ret = put_free_dqblk(sb, type, buf, blk)) < 0) {
- printk(KERN_ERR "VFS: Can't move quota data block (%u) "
- "to free list.\n", blk);
- goto out_buf;
- }
- }
- else {
- memset(buf+(dquot->dq_off & ((1 << V2_DQBLKSIZE_BITS)-1)), 0,
- sizeof(struct v2_disk_dqblk));
- if (le16_to_cpu(dh->dqdh_entries) == V2_DQSTRINBLK-1) {
- /* Insert will write block itself */
- if ((ret = insert_free_dqentry(sb, type, buf, blk)) < 0) {
- printk(KERN_ERR "VFS: Can't insert quota data block (%u) to free entry list.\n", blk);
- goto out_buf;
- }
- }
- else
- if ((ret = write_blk(sb, type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't write quota data "
- "block %u\n", blk);
- goto out_buf;
- }
- }
- dquot->dq_off = 0; /* Quota is now unattached */
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Remove reference to dquot from tree */
-static int remove_tree(struct dquot *dquot, uint *blk, int depth)
-{
- struct super_block *sb = dquot->dq_sb;
- int type = dquot->dq_type;
- dqbuf_t buf = getdqbuf();
- int ret = 0;
- uint newblk;
- __le32 *ref = (__le32 *)buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(sb, type, *blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota data block %u\n", *blk);
- goto out_buf;
- }
- newblk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (depth == V2_DQTREEDEPTH-1) {
- ret = free_dqentry(dquot, newblk);
- newblk = 0;
- }
- else
- ret = remove_tree(dquot, &newblk, depth+1);
- if (ret >= 0 && !newblk) {
- int i;
- ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(0);
- for (i = 0; i < V2_DQBLKSIZE && !buf[i]; i++); /* Block got empty? */
- /* Don't put the root block into the free block list */
- if (i == V2_DQBLKSIZE && *blk != V2_DQTREEOFF) {
- put_free_dqblk(sb, type, buf, *blk);
- *blk = 0;
- }
- else
- if ((ret = write_blk(sb, type, *blk, buf)) < 0)
- printk(KERN_ERR "VFS: Can't write quota tree "
- "block %u.\n", *blk);
- }
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Delete dquot from tree */
-static int v2_delete_dquot(struct dquot *dquot)
-{
- uint tmp = V2_DQTREEOFF;
-
- if (!dquot->dq_off) /* Even not allocated? */
- return 0;
- return remove_tree(dquot, &tmp, 0);
-}
-
-/* Find entry in block */
-static loff_t find_block_dqentry(struct dquot *dquot, uint blk)
-{
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- int i;
- struct v2_disk_dqblk *ddquot = GETENTRIES(buf);
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(dquot->dq_sb, dquot->dq_type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- if (dquot->dq_id)
- for (i = 0; i < V2_DQSTRINBLK &&
- le32_to_cpu(ddquot[i].dqb_id) != dquot->dq_id; i++);
- else { /* ID 0 as a bit more complicated searching... */
- struct v2_disk_dqblk fakedquot;
-
- memset(&fakedquot, 0, sizeof(struct v2_disk_dqblk));
- for (i = 0; i < V2_DQSTRINBLK; i++)
- if (!le32_to_cpu(ddquot[i].dqb_id) &&
- memcmp(&fakedquot, ddquot+i, sizeof(struct v2_disk_dqblk)))
- break;
- }
- if (i == V2_DQSTRINBLK) {
- printk(KERN_ERR "VFS: Quota for id %u referenced "
- "but not present.\n", dquot->dq_id);
- ret = -EIO;
- goto out_buf;
- }
- else
- ret = (blk << V2_DQBLKSIZE_BITS) + sizeof(struct
- v2_disk_dqdbheader) + i * sizeof(struct v2_disk_dqblk);
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Find entry for given id in the tree */
-static loff_t find_tree_dqentry(struct dquot *dquot, uint blk, int depth)
-{
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- __le32 *ref = (__le32 *)buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(dquot->dq_sb, dquot->dq_type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- ret = 0;
- blk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (!blk) /* No reference? */
- goto out_buf;
- if (depth < V2_DQTREEDEPTH-1)
- ret = find_tree_dqentry(dquot, blk, depth+1);
- else
- ret = find_block_dqentry(dquot, blk);
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Find entry for given id in the tree - wrapper function */
-static inline loff_t find_dqentry(struct dquot *dquot)
-{
- return find_tree_dqentry(dquot, V2_DQTREEOFF, 0);
-}
-
-static int v2_read_dquot(struct dquot *dquot)