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fs: pull up trailing slashes check for O_CREAT

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Perform the check for trailing slashes right in the fastpath check and
don't bother with any additional work.

Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-08-08 11:12:50 +02:00
parent c65d41c5a5
commit 4770d96a6d
1 changed files with 4 additions and 8 deletions
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12
fs/namei.c
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@ -3618,6 +3618,9 @@ static struct dentry *lookup_fast_for_open(struct nameidata *nd, int open_flag)
struct dentry *dentry;
if (open_flag & O_CREAT) {
if (trailing_slashes(nd))
return ERR_PTR(-EISDIR);
/* Don't bother on an O_EXCL create */
if (open_flag & O_EXCL)
return NULL;
@ -3684,20 +3687,13 @@ static const char *open_last_lookups(struct nameidata *nd,
bool unlazied;
/* can stay in rcuwalk if not auditing */
if (dentry && audit_dummy_context()) {
if (trailing_slashes(nd))
return ERR_PTR(-EISDIR);
if (dentry && audit_dummy_context())
goto finish_lookup;
}
unlazied = dentry ? try_to_unlazy_next(nd, dentry) :
try_to_unlazy(nd);
if (!unlazied)
return ERR_PTR(-ECHILD);
}
if (trailing_slashes(nd)) {
dput(dentry);
return ERR_PTR(-EISDIR);
}
if (dentry)
goto finish_lookup;
}