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userns: Convert debugfs to use kuid/kgid where appropriate.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
master
Eric W. Biederman 10 years ago
parent
commit
7dc05881b6
  1. 26
      fs/debugfs/inode.c
  2. 1
      init/Kconfig

26
fs/debugfs/inode.c

@ -128,8 +128,8 @@ static inline int debugfs_positive(struct dentry *dentry)
}
struct debugfs_mount_opts {
uid_t uid;
gid_t gid;
kuid_t uid;
kgid_t gid;
umode_t mode;
};
@ -156,6 +156,8 @@ static int debugfs_parse_options(char *data, struct debugfs_mount_opts *opts)
substring_t args[MAX_OPT_ARGS];
int option;
int token;
kuid_t uid;
kgid_t gid;
char *p;
opts->mode = DEBUGFS_DEFAULT_MODE;
@ -169,12 +171,18 @@ static int debugfs_parse_options(char *data, struct debugfs_mount_opts *opts)
case Opt_uid:
if (match_int(&args[0], &option))
return -EINVAL;
opts->uid = option;
uid = make_kuid(current_user_ns(), option);
if (!uid_valid(uid))
return -EINVAL;
opts->uid = uid;
break;
case Opt_gid:
if (match_octal(&args[0], &option))
return -EINVAL;
opts->gid = option;
gid = make_kgid(current_user_ns(), option);
if (!gid_valid(gid))
return -EINVAL;
opts->gid = gid;
break;
case Opt_mode:
if (match_octal(&args[0], &option))
@ -226,10 +234,12 @@ static int debugfs_show_options(struct seq_file *m, struct dentry *root)
struct debugfs_fs_info *fsi = root->d_sb->s_fs_info;
struct debugfs_mount_opts *opts = &fsi->mount_opts;
if (opts->uid != 0)
seq_printf(m, ",uid=%u", opts->uid);
if (opts->gid != 0)
seq_printf(m, ",gid=%u", opts->gid);
if (!uid_eq(opts->uid, GLOBAL_ROOT_UID))
seq_printf(m, ",uid=%u",
from_kuid_munged(&init_user_ns, opts->uid));
if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
seq_printf(m, ",gid=%u",
from_kgid_munged(&init_user_ns, opts->gid));
if (opts->mode != DEBUGFS_DEFAULT_MODE)
seq_printf(m, ",mode=%o", opts->mode);

1
init/Kconfig

@ -964,7 +964,6 @@ config UIDGID_CONVERTED
depends on CODA_FS = n
depends on CONFIGFS_FS = n
depends on CRAMFS = n
depends on DEBUG_FS = n
depends on ECRYPT_FS = n
depends on EFS_FS = n
depends on EXOFS_FS = n

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