userns: Convert fat to use kuid/kgid where appropriate
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 2deeeb8..7d8e0dc 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -23,8 +23,8 @@
#define FAT_ERRORS_RO 3 /* remount r/o on error */
struct fat_mount_options {
- uid_t fs_uid;
- gid_t fs_gid;
+ kuid_t fs_uid;
+ kgid_t fs_gid;
unsigned short fs_fmask;
unsigned short fs_dmask;
unsigned short codepage; /* Codepage for shortname conversions */
diff --git a/fs/fat/file.c b/fs/fat/file.c
index e007b8b..a62e0ec 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -352,7 +352,7 @@
{
umode_t allow_utime = sbi->options.allow_utime;
- if (current_fsuid() != inode->i_uid) {
+ if (!uid_eq(current_fsuid(), inode->i_uid)) {
if (in_group_p(inode->i_gid))
allow_utime >>= 3;
if (allow_utime & MAY_WRITE)
@@ -407,9 +407,9 @@
}
if (((attr->ia_valid & ATTR_UID) &&
- (attr->ia_uid != sbi->options.fs_uid)) ||
+ (!uid_eq(attr->ia_uid, sbi->options.fs_uid))) ||
((attr->ia_valid & ATTR_GID) &&
- (attr->ia_gid != sbi->options.fs_gid)) ||
+ (!gid_eq(attr->ia_gid, sbi->options.fs_gid))) ||
((attr->ia_valid & ATTR_MODE) &&
(attr->ia_mode & ~FAT_VALID_MODE)))
error = -EPERM;
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 05e897f..47d9eb0 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -791,10 +791,12 @@
struct fat_mount_options *opts = &sbi->options;
int isvfat = opts->isvfat;
- if (opts->fs_uid != 0)
- seq_printf(m, ",uid=%u", opts->fs_uid);
- if (opts->fs_gid != 0)
- seq_printf(m, ",gid=%u", opts->fs_gid);
+ if (!uid_eq(opts->fs_uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, opts->fs_uid));
+ if (!gid_eq(opts->fs_gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, opts->fs_gid));
seq_printf(m, ",fmask=%04o", opts->fs_fmask);
seq_printf(m, ",dmask=%04o", opts->fs_dmask);
if (opts->allow_utime)
@@ -1037,12 +1039,16 @@
case Opt_uid:
if (match_int(&args[0], &option))
return 0;
- opts->fs_uid = option;
+ opts->fs_uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(opts->fs_uid))
+ return 0;
break;
case Opt_gid:
if (match_int(&args[0], &option))
return 0;
- opts->fs_gid = option;
+ opts->fs_gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(opts->fs_gid))
+ return 0;
break;
case Opt_umask:
if (match_octal(&args[0], &option))