diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-11 18:08:24 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-14 14:15:28 +0100 |
| commit | 73d049a40fc6269189c4e2ba6792cb5dd054883c (patch) | |
| tree | a713747cd06926ad89bfa9b36ea13dd20bbc507f /fs/open.c | |
| parent | reduce vfs_path_lookup() to do_path_lookup() (diff) | |
| download | linux-73d049a40fc6269189c4e2ba6792cb5dd054883c.tar.xz linux-73d049a40fc6269189c4e2ba6792cb5dd054883c.zip | |
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.c | 14 |
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; |