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authorAl Viro <viro@zeniv.linux.org.uk>2018-03-08 19:00:45 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2018-03-29 22:07:47 +0300
commita03ece5ff2bd7a9abaa0e8ddfe5f79d79e5984c8 (patch)
tree44e770c2479e830e652fa8490133aae57bc31281 /fs/namei.c
parent903ddaf49329076862d65f7284d825759ff67bd6 (diff)
downloadlinux-a03ece5ff2bd7a9abaa0e8ddfe5f79d79e5984c8.tar.xz
fold lookup_real() into __lookup_hash()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c41
1 files changed, 17 insertions, 24 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 921ae32dbc80..a3cd028e8a9b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1473,43 +1473,36 @@ static struct dentry *lookup_dcache(const struct qstr *name,
}
/*
- * Call i_op->lookup on the dentry. The dentry must be negative and
- * unhashed.
- *
- * dir->d_inode->i_mutex must be held
+ * Parent directory has inode locked exclusive. This is one
+ * and only case when ->lookup() gets called on non in-lookup
+ * dentries - as the matter of fact, this only gets called
+ * when directory is guaranteed to have no in-lookup children
+ * at all.
*/
-static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
- unsigned int flags)
-{
- struct dentry *old;
-
- /* Don't create child dentry for a dead directory. */
- if (unlikely(IS_DEADDIR(dir))) {
- dput(dentry);
- return ERR_PTR(-ENOENT);
- }
-
- old = dir->i_op->lookup(dir, dentry, flags);
- if (unlikely(old)) {
- dput(dentry);
- dentry = old;
- }
- return dentry;
-}
-
static struct dentry *__lookup_hash(const struct qstr *name,
struct dentry *base, unsigned int flags)
{
struct dentry *dentry = lookup_dcache(name, base, flags);
+ struct dentry *old;
+ struct inode *dir = base->d_inode;
if (dentry)
return dentry;
+ /* Don't create child dentry for a dead directory. */
+ if (unlikely(IS_DEADDIR(dir)))
+ return ERR_PTR(-ENOENT);
+
dentry = d_alloc(base, name);
if (unlikely(!dentry))
return ERR_PTR(-ENOMEM);
- return lookup_real(base->d_inode, dentry, flags);
+ old = dir->i_op->lookup(dir, dentry, flags);
+ if (unlikely(old)) {
+ dput(dentry);
+ dentry = old;
+ }
+ return dentry;
}
static int lookup_fast(struct nameidata *nd,