ext3 ->tmpfile() support

In this case we do need a bit more than usual, due to orphan
list handling.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 46 insertions, 1 deletions

diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 692de13e3596..7523c61f796c 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1762,6 +1762,45 @@ retry:
         return err;
 }
 
+static int ext3_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+        handle_t *handle;
+        struct inode *inode;
+        int err, retries = 0;
+
+        dquot_initialize(dir);
+
+retry:
+        handle = ext3_journal_start(dir, EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
+                          4 + EXT3_XATTR_TRANS_BLOCKS);
+
+        if (IS_ERR(handle))
+                return PTR_ERR(handle);
+
+        inode = ext3_new_inode (handle, dir, NULL, mode);
+        err = PTR_ERR(inode);
+        if (!IS_ERR(inode)) {
+                inode->i_op = &ext3_file_inode_operations;
+                inode->i_fop = &ext3_file_operations;
+                ext3_set_aops(inode);
+                err = ext3_orphan_add(handle, inode);
+                if (err)
+                        goto err_drop_inode;
+                mark_inode_dirty(inode);
+                d_tmpfile(dentry, inode);
+                unlock_new_inode(inode);
+        }
+        ext3_journal_stop(handle);
+        if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+                goto retry;
+        return err;
+err_drop_inode:
+        ext3_journal_stop(handle);
+        unlock_new_inode(inode);
+        iput(inode);
+        return err;
+}
+
 static int ext3_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
 {
         handle_t *handle;
@@ -2303,7 +2342,7 @@ static int ext3_link (struct dentry * old_dentry,
 
 retry:
         handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
-                                        EXT3_INDEX_EXTRA_TRANS_BLOCKS);
+                                        EXT3_INDEX_EXTRA_TRANS_BLOCKS + 1);
         if (IS_ERR(handle))
                 return PTR_ERR(handle);
 
@@ -2317,6 +2356,11 @@ retry:
         err = ext3_add_entry(handle, dentry, inode);
         if (!err) {
                 ext3_mark_inode_dirty(handle, inode);
+                /* this can happen only for tmpfile being
+                 * linked the first time
+                 */
+                if (inode->i_nlink == 1)
+                        ext3_orphan_del(handle, inode);
                 d_instantiate(dentry, inode);
         } else {
                 drop_nlink(inode);
@@ -2519,6 +2563,7 @@ const struct inode_operations ext3_dir_inode_operations = {
         .mkdir          = ext3_mkdir,
         .rmdir          = ext3_rmdir,
         .mknod          = ext3_mknod,
+        .tmpfile        = ext3_tmpfile,
         .rename         = ext3_rename,
         .setattr        = ext3_setattr,
 #ifdef CONFIG_EXT3_FS_XATTR