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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-27 16:23:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-27 16:23:12 -0700
commit3ae5080f4c2e293229508dabe7c8a90af4e4c460 (patch)
tree9cb11f26905a82b7fac9d3b8f9d61d58bc5c94b0 /fs/namei.c
parent2c9e15a011c55ff96b2b8d2b126d1b9a96abba20 (diff)
parentaabb8fdb41128705fd1627f56fdd571e45fdbcdb (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (37 commits) fs: avoid I_NEW inodes Merge code for single and multiple-instance mounts Remove get_init_pts_sb() Move common mknod_ptmx() calls into caller Parse mount options just once and copy them to super block Unroll essentials of do_remount_sb() into devpts vfs: simple_set_mnt() should return void fs: move bdev code out of buffer.c constify dentry_operations: rest constify dentry_operations: configfs constify dentry_operations: sysfs constify dentry_operations: JFS constify dentry_operations: OCFS2 constify dentry_operations: GFS2 constify dentry_operations: FAT constify dentry_operations: FUSE constify dentry_operations: procfs constify dentry_operations: ecryptfs constify dentry_operations: CIFS constify dentry_operations: AFS ...
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 1928197b387..d040ce11785 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1489,24 +1489,22 @@ int may_open(struct path *path, int acc_mode, int flag)
if (!inode)
return -ENOENT;
- if (S_ISLNK(inode->i_mode))
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFLNK:
return -ELOOP;
-
- if (S_ISDIR(inode->i_mode) && (acc_mode & MAY_WRITE))
- return -EISDIR;
-
- /*
- * FIFO's, sockets and device files are special: they don't
- * actually live on the filesystem itself, and as such you
- * can write to them even if the filesystem is read-only.
- */
- if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
- flag &= ~O_TRUNC;
- } else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) {
+ case S_IFDIR:
+ if (acc_mode & MAY_WRITE)
+ return -EISDIR;
+ break;
+ case S_IFBLK:
+ case S_IFCHR:
if (path->mnt->mnt_flags & MNT_NODEV)
return -EACCES;
-
+ /*FALLTHRU*/
+ case S_IFIFO:
+ case S_IFSOCK:
flag &= ~O_TRUNC;
+ break;
}
error = inode_permission(inode, acc_mode);