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authorEric W. Biederman <ebiederm@xmission.com>2012-02-07 15:41:24 -0800
committerEric W. Biederman <ebiederm@xmission.com>2012-05-15 14:59:27 -0700
commit1523299d5817773e344d135d4b1c485f269400bc (patch)
treeeef0768f5418facb1d37dbe99f346b9d77223f9f /fs/ext3/super.c
parentb8a9f9e183229d163d8ace855cbbb63c209fba3c (diff)
downloadlinux-1523299d5817773e344d135d4b1c485f269400bc.tar.bz2
userns: Convert ext3 to use kuid/kgid where appropriate
Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/ext3/super.c')
-rw-r--r--fs/ext3/super.c35
1 files changed, 25 insertions, 10 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index cf0b5921cf0f..94ef7e616129 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -617,13 +617,15 @@ static int ext3_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",grpid");
if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
seq_puts(seq, ",nogrpid");
- if (sbi->s_resuid != EXT3_DEF_RESUID ||
+ if (!uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT3_DEF_RESUID)) ||
le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
- seq_printf(seq, ",resuid=%u", sbi->s_resuid);
+ seq_printf(seq, ",resuid=%u",
+ from_kuid_munged(&init_user_ns, sbi->s_resuid));
}
- if (sbi->s_resgid != EXT3_DEF_RESGID ||
+ if (!gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT3_DEF_RESGID)) ||
le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
- seq_printf(seq, ",resgid=%u", sbi->s_resgid);
+ seq_printf(seq, ",resgid=%u",
+ from_kgid_munged(&init_user_ns, sbi->s_resgid));
}
if (test_opt(sb, ERRORS_RO)) {
int def_errors = le16_to_cpu(es->s_errors);
@@ -967,6 +969,8 @@ static int parse_options (char *options, struct super_block *sb,
substring_t args[MAX_OPT_ARGS];
int data_opt = 0;
int option;
+ kuid_t uid;
+ kgid_t gid;
#ifdef CONFIG_QUOTA
int qfmt;
#endif
@@ -1000,12 +1004,23 @@ static int parse_options (char *options, struct super_block *sb,
case Opt_resuid:
if (match_int(&args[0], &option))
return 0;
- sbi->s_resuid = option;
+ uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(uid)) {
+ ext3_msg(sb, KERN_ERR, "Invalid uid value %d", option);
+ return -1;
+
+ }
+ sbi->s_resuid = uid;
break;
case Opt_resgid:
if (match_int(&args[0], &option))
return 0;
- sbi->s_resgid = option;
+ gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(gid)) {
+ ext3_msg(sb, KERN_ERR, "Invalid gid value %d", option);
+ return -1;
+ }
+ sbi->s_resgid = gid;
break;
case Opt_sb:
/* handled by get_sb_block() instead of here */
@@ -1651,8 +1666,8 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
}
sb->s_fs_info = sbi;
sbi->s_mount_opt = 0;
- sbi->s_resuid = EXT3_DEF_RESUID;
- sbi->s_resgid = EXT3_DEF_RESGID;
+ sbi->s_resuid = make_kuid(&init_user_ns, EXT3_DEF_RESUID);
+ sbi->s_resgid = make_kgid(&init_user_ns, EXT3_DEF_RESGID);
sbi->s_sb_block = sb_block;
blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
@@ -1716,8 +1731,8 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
else
set_opt(sbi->s_mount_opt, ERRORS_RO);
- sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
- sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
+ sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));
+ sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));
/* enable barriers by default */
set_opt(sbi->s_mount_opt, BARRIER);