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authorMiklos Szeredi <mszeredi@suse.cz>2008-02-08 04:21:41 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:40 -0800
commitb87a267eb7291d075df76ebabd43c7f961b12f67 (patch)
tree5dae609dd0e1163c74ea179e5e84cc5ce61f3e36 /fs
parente55e212c083f0c51a7d4eccd1746b6dca40ffc41 (diff)
downloadlinux-b87a267eb7291d075df76ebabd43c7f961b12f67.tar.bz2
mount options: fix devpts
Add a .show_options super operation to devpts. Small cleanup: when parsing the "mode" option, mask with S_IALLUGO instead of ~S_IFMT. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/devpts/inode.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 06ef9a255c76..f120e1207874 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -20,9 +20,12 @@
#include <linux/devpts_fs.h>
#include <linux/parser.h>
#include <linux/fsnotify.h>
+#include <linux/seq_file.h>
#define DEVPTS_SUPER_MAGIC 0x1cd1
+#define DEVPTS_DEFAULT_MODE 0600
+
static struct vfsmount *devpts_mnt;
static struct dentry *devpts_root;
@@ -32,7 +35,7 @@ static struct {
uid_t uid;
gid_t gid;
umode_t mode;
-} config = {.mode = 0600};
+} config = {.mode = DEVPTS_DEFAULT_MODE};
enum {
Opt_uid, Opt_gid, Opt_mode,
@@ -54,7 +57,7 @@ static int devpts_remount(struct super_block *sb, int *flags, char *data)
config.setgid = 0;
config.uid = 0;
config.gid = 0;
- config.mode = 0600;
+ config.mode = DEVPTS_DEFAULT_MODE;
while ((p = strsep(&data, ",")) != NULL) {
substring_t args[MAX_OPT_ARGS];
@@ -81,7 +84,7 @@ static int devpts_remount(struct super_block *sb, int *flags, char *data)
case Opt_mode:
if (match_octal(&args[0], &option))
return -EINVAL;
- config.mode = option & ~S_IFMT;
+ config.mode = option & S_IALLUGO;
break;
default:
printk(KERN_ERR "devpts: called with bogus options\n");
@@ -92,9 +95,21 @@ static int devpts_remount(struct super_block *sb, int *flags, char *data)
return 0;
}
+static int devpts_show_options(struct seq_file *seq, struct vfsmount *vfs)
+{
+ if (config.setuid)
+ seq_printf(seq, ",uid=%u", config.uid);
+ if (config.setgid)
+ seq_printf(seq, ",gid=%u", config.gid);
+ seq_printf(seq, ",mode=%03o", config.mode);
+
+ return 0;
+}
+
static const struct super_operations devpts_sops = {
.statfs = simple_statfs,
.remount_fs = devpts_remount,
+ .show_options = devpts_show_options,
};
static int