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sysv: i_nlink races in rename() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-03-02 09:38:45 -05:00
parent cbdbb4c1d2
commit 4787d45fa7
1 changed files with 2 additions and 6 deletions
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8
fs/sysv/namei.c
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@ -245,7 +245,6 @@ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
new_de = sysv_find_entry(new_dentry, &new_page);
if (!new_de)
goto out_dir;
inode_inc_link_count(old_inode);
sysv_set_link(new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
@ -257,18 +256,15 @@ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
if (new_dir->i_nlink >= SYSV_SB(new_dir->i_sb)->s_link_max)
goto out_dir;
}
inode_inc_link_count(old_inode);
err = sysv_add_link(new_dentry, old_inode);
if (err) {
inode_dec_link_count(old_inode);
if (err)
goto out_dir;
}
if (dir_de)
inode_inc_link_count(new_dir);
}
sysv_delete_entry(old_de, old_page);
inode_dec_link_count(old_inode);
mark_inode_dirty(old_inode);
if (dir_de) {
sysv_set_link(dir_de, dir_page, new_dir);