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authorDave Kleikamp <shaggy@austin.ibm.com>2006-03-09 13:59:30 -0600
committerDave Kleikamp <shaggy@austin.ibm.com>2006-03-09 13:59:30 -0600
commit69eb66d7da7dba2696281981347698e1693c2340 (patch)
treeba699dc7a1a80efe159f4a4401b174a7e80779fc /fs/jfs/super.c
parentbe0bf7da19135a7a0f8c275f20c819940be218d9 (diff)
JFS: add uid, gid, and umask mount options
OS/2 doesn't initialize the uid, gid, or unix-style permission bits. The uid, gid, & umask mount options perform pretty much like those for the fat file system, overriding what is stored on disk. This is useful for users sharing the file system with OS/2. I implemented a little feature so that if you mask the execute bit, it will be re-enabled on directories when the appropriate read bit is unmasked. I didn't want to implement an fmask & dmask option. Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Diffstat (limited to 'fs/jfs/super.c')
-rw-r--r--fs/jfs/super.c38
1 files changed, 34 insertions, 4 deletions
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index ab633334700..18f69e6aa71 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -194,7 +194,7 @@ static void jfs_put_super(struct super_block *sb)
enum {
Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
- Opt_usrquota, Opt_grpquota
+ Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask
};
static match_table_t tokens = {
@@ -208,6 +208,9 @@ static match_table_t tokens = {
{Opt_ignore, "quota"},
{Opt_usrquota, "usrquota"},
{Opt_grpquota, "grpquota"},
+ {Opt_uid, "uid=%u"},
+ {Opt_gid, "gid=%u"},
+ {Opt_umask, "umask=%u"},
{Opt_err, NULL}
};
@@ -312,7 +315,29 @@ static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
"JFS: quota operations not supported\n");
break;
#endif
-
+ case Opt_uid:
+ {
+ char *uid = args[0].from;
+ sbi->uid = simple_strtoul(uid, &uid, 0);
+ break;
+ }
+ case Opt_gid:
+ {
+ char *gid = args[0].from;
+ sbi->gid = simple_strtoul(gid, &gid, 0);
+ break;
+ }
+ case Opt_umask:
+ {
+ char *umask = args[0].from;
+ sbi->umask = simple_strtoul(umask, &umask, 8);
+ if (sbi->umask & ~0777) {
+ printk(KERN_ERR
+ "JFS: Invalid value of umask\n");
+ goto cleanup;
+ }
+ break;
+ }
default:
printk("jfs: Unrecognized mount option \"%s\" "
" or missing value\n", p);
@@ -400,6 +425,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
return -ENOSPC;
sb->s_fs_info = sbi;
sbi->sb = sb;
+ sbi->uid = sbi->gid = sbi->umask = -1;
/* initialize the mount flag and determine the default error handler */
flag = JFS_ERR_REMOUNT_RO;
@@ -562,10 +588,14 @@ static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
{
struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb);
+ if (sbi->uid != -1)
+ seq_printf(seq, ",uid=%d", sbi->uid);
+ if (sbi->gid != -1)
+ seq_printf(seq, ",gid=%d", sbi->gid);
+ if (sbi->umask != -1)
+ seq_printf(seq, ",umask=%03o", sbi->umask);
if (sbi->flag & JFS_NOINTEGRITY)
seq_puts(seq, ",nointegrity");
- else
- seq_puts(seq, ",integrity");
#if defined(CONFIG_QUOTA)
if (sbi->flag & JFS_USRQUOTA)