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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-11 20:08:24 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-14 16:15:28 +0300
commit73d049a40fc6269189c4e2ba6792cb5dd054883c (patch)
treea713747cd06926ad89bfa9b36ea13dd20bbc507f /fs/open.c
parent5b6ca027d85b7438c84b78a54ccdc2e53f2909cd (diff)
downloadlinux-73d049a40fc6269189c4e2ba6792cb5dd054883c.tar.xz
open-style analog of vfs_path_lookup()
new function: file_open_root(dentry, mnt, name, flags) opens the file vfs_path_lookup would arrive to. Note that name can be empty; in that case the usual requirement that dentry should be a directory is lifted. open-coded equivalents switched to it, may_open() got down exactly one caller and became static. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/open.c')
-rw-r--r--fs/open.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/open.c b/fs/open.c
index d05e18c60bae..48afc5c139d2 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -959,6 +959,20 @@ struct file *filp_open(const char *filename, int flags, int mode)
}
EXPORT_SYMBOL(filp_open);
+struct file *file_open_root(struct dentry *dentry, struct vfsmount *mnt,
+ const char *filename, int flags)
+{
+ struct open_flags op;
+ int lookup = build_open_flags(flags, 0, &op);
+ if (flags & O_CREAT)
+ return ERR_PTR(-EINVAL);
+ if (!filename && (flags & O_DIRECTORY))
+ if (!dentry->d_inode->i_op->lookup)
+ return ERR_PTR(-ENOTDIR);
+ return do_file_open_root(dentry, mnt, filename, &op, lookup);
+}
+EXPORT_SYMBOL(file_open_root);
+
long do_sys_open(int dfd, const char __user *filename, int flags, int mode)
{
struct open_flags op;