7 files changed, 49 insertions, 3 deletions

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index c22213789090..19adeb0ef82a 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1756,6 +1756,10 @@ int ceph_pool_perm_check(struct ceph_inode_info *ci, int need)
         u32 pool;
         int ret, flags;
 
+        /* does not support pool namespace yet */
+        if (ci->i_pool_ns_len)
+                return -EIO;
+
         if (ceph_test_mount_opt(ceph_inode_to_client(&ci->vfs_inode),
                                 NOPOOLPERM))
                 return 0;
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index cdbf8cf3d52c..6fe0ad26a7df 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2753,7 +2753,8 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc,
                              void *inline_data, int inline_len,
                              struct ceph_buffer *xattr_buf,
                              struct ceph_mds_session *session,
-                             struct ceph_cap *cap, int issued)
+                             struct ceph_cap *cap, int issued,
+                             u32 pool_ns_len)
         __releases(ci->i_ceph_lock)
         __releases(mdsc->snap_rwsem)
 {
@@ -2873,6 +2874,8 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc,
         if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) {
                 /* file layout may have changed */
                 ci->i_layout = grant->layout;
+                ci->i_pool_ns_len = pool_ns_len;
+
                 /* size/truncate_seq? */
                 queue_trunc = ceph_fill_file_size(inode, issued,
                                         le32_to_cpu(grant->truncate_seq),
@@ -3411,6 +3414,7 @@ void ceph_handle_caps(struct ceph_mds_session *session,
         u32  inline_len = 0;
         void *snaptrace;
         size_t snaptrace_len;
+        u32 pool_ns_len = 0;
         void *p, *end;
 
         dout("handle_caps from mds%d\n", mds);
@@ -3463,6 +3467,21 @@ void ceph_handle_caps(struct ceph_mds_session *session,
                 p += inline_len;
         }
 
+        if (le16_to_cpu(msg->hdr.version) >= 8) {
+                u64 flush_tid;
+                u32 caller_uid, caller_gid;
+                u32 osd_epoch_barrier;
+                /* version >= 5 */
+                ceph_decode_32_safe(&p, end, osd_epoch_barrier, bad);
+                /* version >= 6 */
+                ceph_decode_64_safe(&p, end, flush_tid, bad);
+                /* version >= 7 */
+                ceph_decode_32_safe(&p, end, caller_uid, bad);
+                ceph_decode_32_safe(&p, end, caller_gid, bad);
+                /* version >= 8 */
+                ceph_decode_32_safe(&p, end, pool_ns_len, bad);
+        }
+
         /* lookup ino */
         inode = ceph_find_inode(sb, vino);
         ci = ceph_inode(inode);
@@ -3518,7 +3537,8 @@ void ceph_handle_caps(struct ceph_mds_session *session,
                                   &cap, &issued);
                 handle_cap_grant(mdsc, inode, h,
                                  inline_version, inline_data, inline_len,
-                                 msg->middle, session, cap, issued);
+                                 msg->middle, session, cap, issued,
+                                 pool_ns_len);
                 if (realm)
                         ceph_put_snap_realm(mdsc, realm);
                 goto done_unlocked;
@@ -3542,7 +3562,8 @@ void ceph_handle_caps(struct ceph_mds_session *session,
                 issued |= __ceph_caps_dirty(ci);
                 handle_cap_grant(mdsc, inode, h,
                                  inline_version, inline_data, inline_len,
-                                 msg->middle, session, cap, issued);
+                                 msg->middle, session, cap, issued,
+                                 pool_ns_len);
                 goto done_unlocked;
 
         case CEPH_CAP_OP_FLUSH_ACK:
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index fb4ba2e4e2a5..5849b88bbed3 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -396,6 +396,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
         ci->i_symlink = NULL;
 
         memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
+        ci->i_pool_ns_len = 0;
 
         ci->i_fragtree = RB_ROOT;
         mutex_init(&ci->i_fragtree_mutex);
@@ -756,6 +757,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
                 if (ci->i_layout.fl_pg_pool != info->layout.fl_pg_pool)
                         ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
                 ci->i_layout = info->layout;
+                ci->i_pool_ns_len = iinfo->pool_ns_len;
 
                 queue_trunc = ceph_fill_file_size(inode, issued,
                                         le32_to_cpu(info->truncate_seq),
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index e7b130a637f9..911d64d865f1 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -100,6 +100,14 @@ static int parse_reply_info_in(void **p, void *end,
         } else
                 info->inline_version = CEPH_INLINE_NONE;
 
+        if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
+                ceph_decode_32_safe(p, end, info->pool_ns_len, bad);
+                ceph_decode_need(p, end, info->pool_ns_len, bad);
+                *p += info->pool_ns_len;
+        } else {
+                info->pool_ns_len = 0;
+        }
+
         return 0;
 bad:
         return err;
@@ -2298,6 +2306,14 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
                 ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir),
                                   CEPH_CAP_PIN);
 
+        /* deny access to directories with pool_ns layouts */
+        if (req->r_inode && S_ISDIR(req->r_inode->i_mode) &&
+            ceph_inode(req->r_inode)->i_pool_ns_len)
+                return -EIO;
+        if (req->r_locked_dir &&
+            ceph_inode(req->r_locked_dir)->i_pool_ns_len)
+                return -EIO;
+
         /* issue */
         mutex_lock(&mdsc->mutex);
         __register_request(mdsc, req, dir);
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index ccf11ef0ca87..37712ccffcc6 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -44,6 +44,7 @@ struct ceph_mds_reply_info_in {
         u64 inline_version;
         u32 inline_len;
         char *inline_data;
+        u32 pool_ns_len;
 };
 
 /*
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 75b7d125ce66..9c458eb52245 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -287,6 +287,7 @@ struct ceph_inode_info {
 
         struct ceph_dir_layout i_dir_layout;
         struct ceph_file_layout i_layout;
+        size_t i_pool_ns_len;
         char *i_symlink;
 
         /* for dirs */
diff --git a/include/linux/ceph/ceph_features.h b/include/linux/ceph/ceph_features.h
index c1ef6f14e7be..15151f3c4120 100644
--- a/include/linux/ceph/ceph_features.h
+++ b/include/linux/ceph/ceph_features.h
@@ -75,6 +75,7 @@
 #define CEPH_FEATURE_CRUSH_TUNABLES5    (1ULL<<58) /* chooseleaf stable mode */
 // duplicated since it was introduced at the same time as CEPH_FEATURE_CRUSH_TUNABLES5
 #define CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING   (1ULL<<58) /* New, v7 encoding */
+#define CEPH_FEATURE_FS_FILE_LAYOUT_V2       (1ULL<<58) /* file_layout_t */
 
 /*
  * The introduction of CEPH_FEATURE_OSD_SNAPMAPPER caused the feature