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ext4: ->tmpfile() support

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very similar to ext3 counterpart...

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
parent 46a1c2c7ae
commit af51a2ac36
1 changed files with 46 additions and 1 deletions
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47
fs/ext4/namei.c
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@ -2299,6 +2299,45 @@ retry:
return err; 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:
inode = ext4_new_inode_start_handle(dir, mode,
NULL, 0, NULL,
EXT4_HT_DIR,
EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
4 + EXT4_XATTR_TRANS_BLOCKS);
handle = ext4_journal_current_handle();
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;
}
struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
struct ext4_dir_entry_2 *de, struct ext4_dir_entry_2 *de,
int blocksize, int csum_size, int blocksize, int csum_size,
@ -2906,7 +2945,7 @@ static int ext4_link(struct dentry *old_dentry,
retry: retry:
handle = ext4_journal_start(dir, EXT4_HT_DIR, handle = ext4_journal_start(dir, EXT4_HT_DIR,
(EXT4_DATA_TRANS_BLOCKS(dir->i_sb) + (EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS)); EXT4_INDEX_EXTRA_TRANS_BLOCKS) + 1);
if (IS_ERR(handle)) if (IS_ERR(handle))
return PTR_ERR(handle); return PTR_ERR(handle);
@ -2920,6 +2959,11 @@ retry:
err = ext4_add_entry(handle, dentry, inode); err = ext4_add_entry(handle, dentry, inode);
if (!err) { if (!err) {
ext4_mark_inode_dirty(handle, inode); 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); d_instantiate(dentry, inode);
} else { } else {
drop_nlink(inode); drop_nlink(inode);
@ -3172,6 +3216,7 @@ const struct inode_operations ext4_dir_inode_operations = {
.mkdir = ext4_mkdir, .mkdir = ext4_mkdir,
.rmdir = ext4_rmdir, .rmdir = ext4_rmdir,
.mknod = ext4_mknod, .mknod = ext4_mknod,
.tmpfile = ext4_tmpfile,
.rename = ext4_rename, .rename = ext4_rename,
.setattr = ext4_setattr, .setattr = ext4_setattr,
.setxattr = generic_setxattr, .setxattr = generic_setxattr,