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ceph: Translate between uid and gids in cap messages and kuids and kgids 

- Make the uid and gid arguments of send_cap_msg() used to compose
  ceph_mds_caps messages of type kuid_t and kgid_t.

- Pass inode->i_uid and inode->i_gid in __send_cap to send_cap_msg()
  through variables of type kuid_t and kgid_t.

- Modify struct ceph_cap_snap to store uids and gids in types kuid_t
  and kgid_t.  This allows capturing inode->i_uid and inode->i_gid in
  ceph_queue_cap_snap() without loss and pssing them to
  __ceph_flush_snaps() where they are removed from struct
  ceph_cap_snap and passed to send_cap_msg().

- In handle_cap_grant translate uid and gids in the initial user
  namespace stored in struct ceph_mds_cap into kuids and kgids
  before setting inode->i_uid and inode->i_gid.

Cc: Sage Weil <sage@inktank.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2013-01-31 02:56:19 -08:00
parent eea553c21f
commit 05cb11c17e
2 changed files with 9 additions and 9 deletions
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14
fs/ceph/caps.c
View File

@ -930,7 +930,7 @@ static int send_cap_msg(struct ceph_mds_session *session,
u64 size, u64 max_size,
struct timespec *mtime, struct timespec *atime,
u64 time_warp_seq,
uid_t uid, gid_t gid, umode_t mode,
kuid_t uid, kgid_t gid, umode_t mode,
u64 xattr_version,
struct ceph_buffer *xattrs_buf,
u64 follows)
@ -974,8 +974,8 @@ static int send_cap_msg(struct ceph_mds_session *session,
ceph_encode_timespec(&fc->atime, atime);
fc->time_warp_seq = cpu_to_le32(time_warp_seq);
fc->uid = cpu_to_le32(uid);
fc->gid = cpu_to_le32(gid);
fc->uid = cpu_to_le32(from_kuid(&init_user_ns, uid));
fc->gid = cpu_to_le32(from_kgid(&init_user_ns, gid));
fc->mode = cpu_to_le32(mode);
fc->xattr_version = cpu_to_le64(xattr_version);
@ -1081,8 +1081,8 @@ static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
struct timespec mtime, atime;
int wake = 0;
umode_t mode;
uid_t uid;
gid_t gid;
kuid_t uid;
kgid_t gid;
struct ceph_mds_session *session;
u64 xattr_version = 0;
struct ceph_buffer *xattr_blob = NULL;
@ -2359,8 +2359,8 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant,
if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
inode->i_mode = le32_to_cpu(grant->mode);
inode->i_uid = le32_to_cpu(grant->uid);
inode->i_gid = le32_to_cpu(grant->gid);
inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid));
inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid));
dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
inode->i_uid, inode->i_gid);
}

4
fs/ceph/super.h
View File

@ -138,8 +138,8 @@ struct ceph_cap_snap {
struct ceph_snap_context *context;
umode_t mode;
uid_t uid;
gid_t gid;
kuid_t uid;
kgid_t gid;
struct ceph_buffer *xattr_blob;
u64 xattr_version;