+#ifdef CONFIG_QUOTA
+static int reiserfs_dquot_initialize(struct inode *inode, int type)
+{
+ struct reiserfs_transaction_handle th;
+ int ret;
+
+ /* We may create quota structure so we need to reserve enough blocks */
+ reiserfs_write_lock(inode->i_sb);
+ journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+ ret = dquot_initialize(inode, type);
+ journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+ reiserfs_write_unlock(inode->i_sb);
+ return ret;
+}
+
+static int reiserfs_dquot_drop(struct inode *inode)
+{
+ struct reiserfs_transaction_handle th;
+ int ret;
+
+ /* We may delete quota structure so we need to reserve enough blocks */
+ reiserfs_write_lock(inode->i_sb);
+ journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+ ret = dquot_drop(inode);
+ journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+ reiserfs_write_unlock(inode->i_sb);
+ return ret;
+}
+
+static int reiserfs_write_dquot(struct dquot *dquot)
+{
+ struct reiserfs_transaction_handle th;
+ int ret;
+
+ reiserfs_write_lock(dquot->dq_sb);
+ journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
+ ret = dquot_commit(dquot);
+ journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
+ reiserfs_write_unlock(dquot->dq_sb);
+ return ret;
+}
+
+static int reiserfs_acquire_dquot(struct dquot *dquot)
+{
+ struct reiserfs_transaction_handle th;
+ int ret;
+
+ reiserfs_write_lock(dquot->dq_sb);
+ journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+ ret = dquot_acquire(dquot);
+ journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+ reiserfs_write_unlock(dquot->dq_sb);
+ return ret;
+}
+
+static int reiserfs_release_dquot(struct dquot *dquot)
+{
+ struct reiserfs_transaction_handle th;
+ int ret;
+
+ reiserfs_write_lock(dquot->dq_sb);
+ journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+ ret = dquot_release(dquot);
+ journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+ reiserfs_write_unlock(dquot->dq_sb);
+ return ret;
+}
+
+static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
+{
+ /* Are we journalling quotas? */
+ if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+ REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
+ dquot_mark_dquot_dirty(dquot);
+ return reiserfs_write_dquot(dquot);
+ }
+ else
+ return dquot_mark_dquot_dirty(dquot);
+}
+
+static int reiserfs_write_info(struct super_block *sb, int type)
+{
+ struct reiserfs_transaction_handle th;
+ int ret;
+
+ /* Data block + inode block */
+ reiserfs_write_lock(sb);
+ journal_begin(&th, sb, 2);
+ ret = dquot_commit_info(sb, type);
+ journal_end(&th, sb, 2);
+ reiserfs_write_unlock(sb);
+ return ret;
+}
+
+/*
+ * Turn on quotas during mount time - we need to find
+ * the quota file and such...
+ */
+static int reiserfs_quota_on_mount(struct super_block *sb, int type)
+{
+ int err;
+ struct dentry *dentry;
+ struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type],
+ .hash = 0,
+ .len = strlen(REISERFS_SB(sb)->s_qf_names[type])};
+
+ dentry = lookup_hash(&name, sb->s_root);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry);
+ /* Now invalidate and put the dentry - quota got its own reference
+ * to inode and dentry has at least wrong hash so we had better
+ * throw it away */
+ d_invalidate(dentry);
+ dput(dentry);
+ return err;
+}
+
+/*
+ * Standard function to be called on quota_on
+ */
+static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
+{
+ int err;
+ struct nameidata nd;
+
+ err = path_lookup(path, LOOKUP_FOLLOW, &nd);
+ if (err)
+ return err;
+ /* Quotafile not on the same filesystem? */
+ if (nd.mnt->mnt_sb != sb) {
+ path_release(&nd);
+ return -EXDEV;
+ }
+ /* We must not pack tails for quota files on reiserfs for quota IO to work */
+ if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
+ reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled.");
+ path_release(&nd);
+ return -EINVAL;
+ }
+ /* Not journalling quota? No more tests needed... */
+ if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
+ !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
+ path_release(&nd);
+ return vfs_quota_on(sb, type, format_id, path);
+ }
+ /* Quotafile not of fs root? */
+ if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
+ reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. "
+ "Journalled quota will not work.");
+ path_release(&nd);
+ return vfs_quota_on(sb, type, format_id, path);
+}
+
+/* Read data from quotafile - avoid pagecache and such because we cannot afford
+ * acquiring the locks... As quota files are never truncated and quota code
+ * itself serializes the operations (and noone else should touch the files)
+ * we don't have to be afraid of races */
+static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
+ size_t len, loff_t off)
+{
+ struct inode *inode = sb_dqopt(sb)->files[type];
+ unsigned long blk = off >> sb->s_blocksize_bits;
+ int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+ size_t toread;
+ struct buffer_head tmp_bh, *bh;
+ loff_t i_size = i_size_read(inode);
+
+ if (off > i_size)
+ return 0;
+ if (off+len > i_size)
+ len = i_size-off;
+ toread = len;
+ while (toread > 0) {
+ tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread;
+ tmp_bh.b_state = 0;
+ /* Quota files are without tails so we can safely use this function */
+ reiserfs_write_lock(sb);
+ err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
+ reiserfs_write_unlock(sb);
+ if (err)
+ return err;
+ if (!buffer_mapped(&tmp_bh)) /* A hole? */
+ memset(data, 0, tocopy);
+ else {
+ bh = sb_bread(sb, tmp_bh.b_blocknr);
+ if (!bh)
+ return -EIO;
+ memcpy(data, bh->b_data+offset, tocopy);
+ brelse(bh);
+ }
+ offset = 0;
+ toread -= tocopy;
+ data += tocopy;
+ blk++;
+ }
+ return len;
+}
+
+/* Write to quotafile (we know the transaction is already started and has
+ * enough credits) */
+static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
+ const char *data, size_t len, loff_t off)
+{
+ struct inode *inode = sb_dqopt(sb)->files[type];
+ unsigned long blk = off >> sb->s_blocksize_bits;
+ int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+ int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
+ size_t towrite = len;
+ struct buffer_head tmp_bh, *bh;
+
+ down(&inode->i_sem);
+ while (towrite > 0) {
+ tocopy = sb->s_blocksize - offset < towrite ?
+ sb->s_blocksize - offset : towrite;
+ tmp_bh.b_state = 0;
+ err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
+ if (err)
+ goto out;
+ if (offset || tocopy != sb->s_blocksize)
+ bh = sb_bread(sb, tmp_bh.b_blocknr);
+ else
+ bh = sb_getblk(sb, tmp_bh.b_blocknr);
+ if (!bh) {
+ err = -EIO;
+ goto out;
+ }
+ lock_buffer(bh);
+ memcpy(bh->b_data+offset, data, tocopy);
+ flush_dcache_page(bh->b_page);
+ set_buffer_uptodate(bh);
+ unlock_buffer(bh);
+ reiserfs_prepare_for_journal(sb, bh, 1);
+ journal_mark_dirty(current->journal_info, sb, bh);
+ if (!journal_quota)
+ reiserfs_add_ordered_list(inode, bh);
+ brelse(bh);
+ offset = 0;
+ towrite -= tocopy;
+ data += tocopy;
+ blk++;
+ }
+out:
+ if (len == towrite)
+ return err;
+ if (inode->i_size < off+len-towrite)
+ i_size_write(inode, off+len-towrite);
+ inode->i_version++;
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
+ up(&inode->i_sem);
+ return len - towrite;
+}
+
+#endif
+