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authorChristian Brauner <christian.brauner@ubuntu.com>2021-12-03 14:17:03 +0300
committerChristian Brauner <christian.brauner@ubuntu.com>2021-12-03 20:58:11 +0300
commit4472071331549e911a5abad41aea6e3be855a1a4 (patch)
tree6da51e76328b10a835c33f6f916a671a12274e5d /fs/ksmbd
parent8cc5c54de44c5e8e104d364a627ac4296845fc7f (diff)
downloadlinux-4472071331549e911a5abad41aea6e3be855a1a4.tar.xz
fs: use low-level mapping helpers
In a few places the vfs needs to interact with bare k{g,u}ids directly instead of struct inode. These are just a few. In previous patches we introduced low-level mapping helpers that are able to support filesystems mounted an idmapping. This patch simply converts the places to use these new helpers. Link: https://lore.kernel.org/r/20211123114227.3124056-7-brauner@kernel.org (v1) Link: https://lore.kernel.org/r/20211130121032.3753852-7-brauner@kernel.org (v2) Link: https://lore.kernel.org/r/20211203111707.3901969-7-brauner@kernel.org Cc: Seth Forshee <sforshee@digitalocean.com> Cc: Amir Goldstein <amir73il@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> CC: linux-fsdevel@vger.kernel.org Reviewed-by: Seth Forshee <sforshee@digitalocean.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'fs/ksmbd')
-rw-r--r--fs/ksmbd/smbacl.c18
-rw-r--r--fs/ksmbd/smbacl.h4
2 files changed, 4 insertions, 18 deletions
diff --git a/fs/ksmbd/smbacl.c b/fs/ksmbd/smbacl.c
index ab8099e0fd7f..6ecf55ea1fed 100644
--- a/fs/ksmbd/smbacl.c
+++ b/fs/ksmbd/smbacl.c
@@ -275,14 +275,7 @@ static int sid_to_id(struct user_namespace *user_ns,
uid_t id;
id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
- /*
- * Translate raw sid into kuid in the server's user
- * namespace.
- */
- uid = make_kuid(&init_user_ns, id);
-
- /* If this is an idmapped mount, apply the idmapping. */
- uid = kuid_from_mnt(user_ns, uid);
+ uid = mapped_kuid_user(user_ns, &init_user_ns, KUIDT_INIT(id));
if (uid_valid(uid)) {
fattr->cf_uid = uid;
rc = 0;
@@ -292,14 +285,7 @@ static int sid_to_id(struct user_namespace *user_ns,
gid_t id;
id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
- /*
- * Translate raw sid into kgid in the server's user
- * namespace.
- */
- gid = make_kgid(&init_user_ns, id);
-
- /* If this is an idmapped mount, apply the idmapping. */
- gid = kgid_from_mnt(user_ns, gid);
+ gid = mapped_kgid_user(user_ns, &init_user_ns, KGIDT_INIT(id));
if (gid_valid(gid)) {
fattr->cf_gid = gid;
rc = 0;
diff --git a/fs/ksmbd/smbacl.h b/fs/ksmbd/smbacl.h
index eba1ebb9e92e..811af3309429 100644
--- a/fs/ksmbd/smbacl.h
+++ b/fs/ksmbd/smbacl.h
@@ -217,7 +217,7 @@ static inline uid_t posix_acl_uid_translate(struct user_namespace *mnt_userns,
kuid_t kuid;
/* If this is an idmapped mount, apply the idmapping. */
- kuid = kuid_into_mnt(mnt_userns, pace->e_uid);
+ kuid = mapped_kuid_fs(mnt_userns, &init_user_ns, pace->e_uid);
/* Translate the kuid into a userspace id ksmbd would see. */
return from_kuid(&init_user_ns, kuid);
@@ -229,7 +229,7 @@ static inline gid_t posix_acl_gid_translate(struct user_namespace *mnt_userns,
kgid_t kgid;
/* If this is an idmapped mount, apply the idmapping. */
- kgid = kgid_into_mnt(mnt_userns, pace->e_gid);
+ kgid = mapped_kgid_fs(mnt_userns, &init_user_ns, pace->e_gid);
/* Translate the kgid into a userspace id ksmbd would see. */
return from_kgid(&init_user_ns, kgid);