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ext4: ->tmpfile() support

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very similar to ext3 counterpart...

Change-Id: Ia6d57ae72f19f17b3ea8dc3ebb5016aa4d7bda5d
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-06-29 13:23:08 +04:00 committed by Artem Borisov
parent 3b63bffd0f
commit 2813fb51b6
1 changed files with 49 additions and 1 deletions
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50
fs/ext4/namei.c
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@ -1826,6 +1826,48 @@ retry:
return err;
}
static int ext4_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 = ext4_journal_start(dir, EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
4 + EXT4_XATTR_TRANS_BLOCKS);
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);
inode = ext4_new_inode(handle, dir, mode, NULL, 0, NULL);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ext4_file_inode_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
err = ext4_orphan_add(handle, inode);
if (err)
goto err_drop_inode;
mark_inode_dirty(inode);
d_tmpfile(dentry, inode);
unlock_new_inode(inode);
}
if (handle)
ext4_journal_stop(handle);
if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
err_drop_inode:
ext4_journal_stop(handle);
unlock_new_inode(inode);
iput(inode);
return err;
}
static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
handle_t *handle;
@ -2380,7 +2422,7 @@ static int ext4_link(struct dentry *old_dentry,
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS);
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 1);
if (IS_ERR(handle))
return PTR_ERR(handle);
@ -2394,6 +2436,11 @@ retry:
err = ext4_add_entry(handle, dentry, inode);
if (!err) {
ext4_mark_inode_dirty(handle, inode);
/* this can happen only for tmpfile being
* linked the first time
*/
if (inode->i_nlink == 1)
ext4_orphan_del(handle, inode);
d_instantiate(dentry, inode);
} else {
drop_nlink(inode);
@ -2610,6 +2657,7 @@ const struct inode_operations ext4_dir_inode_operations = {
.mkdir = ext4_mkdir,
.rmdir = ext4_rmdir,
.mknod = ext4_mknod,
.tmpfile = ext4_tmpfile,
.rename = ext4_rename,
.setattr = ext4_setattr,
#ifdef CONFIG_EXT4_FS_XATTR