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authorAl Viro <viro@zeniv.linux.org.uk>2015-12-26 22:33:24 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2016-01-04 10:28:40 -0500
commit62fb4a155f745285d9b1640c3ef53bf90c12f17c (patch)
treefbda98158c327b3afa13b7233a2822207b06cb8f /fs/namei.c
parentb40ef8696fbbb1107fbe5f4afc21c357f16e5ffc (diff)
downloadlinux-62fb4a155f745285d9b1640c3ef53bf90c12f17c.tar.bz2
don't carry MAY_OPEN in op->acc_mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 9e102aca3480..45c702edce3c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2663,10 +2663,6 @@ static int may_open(struct path *path, int acc_mode, int flag)
struct inode *inode = dentry->d_inode;
int error;
- /* O_PATH? */
- if (!acc_mode)
- return 0;
-
if (!inode)
return -ENOENT;
@@ -2688,7 +2684,7 @@ static int may_open(struct path *path, int acc_mode, int flag)
break;
}
- error = inode_permission(inode, acc_mode);
+ error = inode_permission(inode, MAY_OPEN | acc_mode);
if (error)
return error;
@@ -2880,7 +2876,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
if (*opened & FILE_CREATED) {
WARN_ON(!(open_flag & O_CREAT));
fsnotify_create(dir, dentry);
- acc_mode = MAY_OPEN;
+ acc_mode = 0;
}
error = may_open(&file->f_path, acc_mode, open_flag);
if (error)
@@ -3093,7 +3089,7 @@ retry_lookup:
/* Don't check for write permission, don't truncate */
open_flag &= ~O_TRUNC;
will_truncate = false;
- acc_mode = MAY_OPEN;
+ acc_mode = 0;
path_to_nameidata(&path, nd);
goto finish_open_created;
}
@@ -3177,10 +3173,11 @@ finish_open:
got_write = true;
}
finish_open_created:
- error = may_open(&nd->path, acc_mode, open_flag);
- if (error)
- goto out;
-
+ if (likely(!(open_flag & O_PATH))) {
+ error = may_open(&nd->path, acc_mode, open_flag);
+ if (error)
+ goto out;
+ }
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
error = vfs_open(&nd->path, file, current_cred());
if (!error) {
@@ -3267,7 +3264,7 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags,
goto out2;
audit_inode(nd->name, child, 0);
/* Don't check for other permissions, the inode was just created */
- error = may_open(&path, MAY_OPEN, op->open_flag);
+ error = may_open(&path, 0, op->open_flag);
if (error)
goto out2;
file->f_path.mnt = path.mnt;