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make lookup_one_len() safe to use with directory locked shared 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-04-06 16:45:33 -04:00
parent 88d8331afb
commit 8613a209ff
1 changed files with 3 additions and 1 deletions
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4
fs/namei.c
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@ -2471,6 +2471,7 @@ static int lookup_one_len_common(const char *name, struct dentry *base,
*/
struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
{
struct dentry *dentry;
struct qstr this;
int err;
@ -2480,7 +2481,8 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
if (err)
return ERR_PTR(err);
return __lookup_hash(&this, base, 0);
dentry = lookup_dcache(&this, base, 0);
return dentry ? dentry : __lookup_slow(&this, base, 0);
}
EXPORT_SYMBOL(lookup_one_len);