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Restore LOOKUP_DIRECTORY hint handling in final lookup on open() 

Lose want_dir argument, while we are at it - since now
nd->flags & LOOKUP_DIRECTORY is equivalent to it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-03-26 12:40:13 -04:00
parent 01e77706cd
commit 3e297b6134
1 changed files with 10 additions and 8 deletions
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18
fs/namei.c
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@ -1610,8 +1610,7 @@ exit:
static struct file *do_last(struct nameidata *nd, struct path *path,
int open_flag, int acc_mode,
int mode, const char *pathname,
int *want_dir)
int mode, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
struct file *filp;
@ -1642,7 +1641,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
if (nd->last.name[nd->last.len]) {
if (open_flag & O_CREAT)
goto exit;
*want_dir = 1;
nd->flags |= LOOKUP_DIRECTORY;
}
/* just plain open? */
@ -1656,8 +1655,10 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
if (path->dentry->d_inode->i_op->follow_link)
return NULL;
error = -ENOTDIR;
if (*want_dir && !path->dentry->d_inode->i_op->lookup)
goto exit_dput;
if (nd->flags & LOOKUP_DIRECTORY) {
if (!path->dentry->d_inode->i_op->lookup)
goto exit_dput;
}
path_to_nameidata(path, nd);
audit_inode(pathname, nd->path.dentry);
goto ok;
@ -1766,7 +1767,6 @@ struct file *do_filp_open(int dfd, const char *pathname,
int count = 0;
int flag = open_to_namei_flags(open_flag);
int force_reval = 0;
int want_dir = open_flag & O_DIRECTORY;
if (!(open_flag & O_CREAT))
mode = 0;
@ -1828,7 +1828,9 @@ reval:
if (open_flag & O_EXCL)
nd.flags |= LOOKUP_EXCL;
}
filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname, &want_dir);
if (open_flag & O_DIRECTORY)
nd.flags |= LOOKUP_DIRECTORY;
filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname);
while (unlikely(!filp)) { /* trailing symlink */
struct path holder;
struct inode *inode = path.dentry->d_inode;
@ -1866,7 +1868,7 @@ reval:
}
holder = path;
nd.flags &= ~LOOKUP_PARENT;
filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname, &want_dir);
filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname);
if (inode->i_op->put_link)
inode->i_op->put_link(holder.dentry, &nd, cookie);
path_put(&holder);