ceph: check inode type for CEPH_CAP_FILE_{CACHE,RD,REXTEND,LAZYIO}

These bits will have new meaning for directory inodes.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/caps.c

@@ -573,7 +573,8 @@ static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap,
 	 * Each time we receive FILE_CACHE anew, we increment
 	 * i_rdcache_gen.
 	 */
-	if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) &&
+	if (S_ISREG(ci->vfs_inode.i_mode) &&
+	    (issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) &&
 	    (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) {
 		ci->i_rdcache_gen++;
 	}
@@ -958,7 +959,7 @@ int __ceph_caps_used(struct ceph_inode_info *ci)
 	if (ci->i_rd_ref)
 		used |= CEPH_CAP_FILE_RD;
 	if (ci->i_rdcache_ref ||
-	    (!S_ISDIR(ci->vfs_inode.i_mode) && /* ignore readdir cache */
+	    (S_ISREG(ci->vfs_inode.i_mode) &&
 	     ci->vfs_inode.i_data.nrpages))
 		used |= CEPH_CAP_FILE_CACHE;
 	if (ci->i_wr_ref)
@@ -985,6 +986,20 @@ int __ceph_caps_file_wanted(struct ceph_inode_info *ci)
 	return ceph_caps_for_mode(bits >> 1);
 }
 
+/*
+ * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
+ */
+int __ceph_caps_wanted(struct ceph_inode_info *ci)
+{
+	int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
+	if (!S_ISDIR(ci->vfs_inode.i_mode)) {
+		/* we want EXCL if dirty data */
+		if (w & CEPH_CAP_FILE_BUFFER)
+			w |= CEPH_CAP_FILE_EXCL;
+	}
+	return w;
+}
+
 /*
  * Return caps we have registered with the MDS(s) as 'wanted'.
  */
@@ -1903,7 +1918,7 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags,
 	 * If we fail, it's because pages are locked.... try again later.
 	 */
 	if ((!no_delay || mdsc->stopping) &&
-	    !S_ISDIR(inode->i_mode) &&		/* ignore readdir cache */
+	    S_ISREG(inode->i_mode) &&
 	    !(ci->i_wb_ref || ci->i_wrbuffer_ref) &&   /* no dirty pages... */
 	    inode->i_data.nrpages &&		/* have cached pages */
 	    (revoking & (CEPH_CAP_FILE_CACHE|
@@ -2635,7 +2650,8 @@ static int try_get_cap_refs(struct inode *inode, int need, int want,
 				snap_rwsem_locked = true;
 			}
 			*got = need | (have & want);
-			if ((need & CEPH_CAP_FILE_RD) &&
+			if (S_ISREG(inode->i_mode) &&
+			    (need & CEPH_CAP_FILE_RD) &&
 			    !(*got & CEPH_CAP_FILE_CACHE))
 				ceph_disable_fscache_readpage(ci);
 			__take_cap_refs(ci, *got, true);
@@ -2643,7 +2659,8 @@ static int try_get_cap_refs(struct inode *inode, int need, int want,
 		}
 	} else {
 		int session_readonly = false;
-		if ((need & CEPH_CAP_FILE_WR) && ci->i_auth_cap) {
+		if (ci->i_auth_cap &&
+		    (need & (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_EXCL))) {
 			struct ceph_mds_session *s = ci->i_auth_cap->session;
 			spin_lock(&s->s_cap_lock);
 			session_readonly = s->s_readonly;
@@ -2817,7 +2834,8 @@ int ceph_get_caps(struct file *filp, int need, int want,
 			return ret;
 		}
 
-		if (ci->i_inline_version != CEPH_INLINE_NONE &&
+		if (S_ISREG(ci->vfs_inode.i_mode) &&
+		    ci->i_inline_version != CEPH_INLINE_NONE &&
 		    (_got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) &&
 		    i_size_read(inode) > 0) {
 			struct page *page =
@@ -2850,7 +2868,8 @@ int ceph_get_caps(struct file *filp, int need, int want,
 		break;
 	}
 
-	if ((_got & CEPH_CAP_FILE_RD) && (_got & CEPH_CAP_FILE_CACHE))
+	if (S_ISREG(ci->vfs_inode.i_mode) &&
+	    (_got & CEPH_CAP_FILE_RD) && (_got & CEPH_CAP_FILE_CACHE))
 		ceph_fscache_revalidate_cookie(ci);
 
 	*got = _got;
@@ -3140,7 +3159,7 @@ static void handle_cap_grant(struct inode *inode,
 	 * try to invalidate (once).  (If there are dirty buffers, we
 	 * will invalidate _after_ writeback.)
 	 */
-	if (!S_ISDIR(inode->i_mode) && /* don't invalidate readdir cache */
+	if (S_ISREG(inode->i_mode) && /* don't invalidate readdir cache */
 	    ((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) &&
 	    (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 &&
 	    !(ci->i_wrbuffer_ref || ci->i_wb_ref)) {
@@ -3304,11 +3323,12 @@ static void handle_cap_grant(struct inode *inode,
 		     ceph_cap_string(cap->issued),
 		     ceph_cap_string(newcaps),
 		     ceph_cap_string(revoking));
-		if (revoking & used & CEPH_CAP_FILE_BUFFER)
+		if (S_ISREG(inode->i_mode) &&
+		    (revoking & used & CEPH_CAP_FILE_BUFFER))
 			writeback = true;  /* initiate writeback; will delay ack */
-		else if (revoking == CEPH_CAP_FILE_CACHE &&
-			 (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 &&
-			 queue_invalidate)
+		else if (queue_invalidate &&
+			 revoking == CEPH_CAP_FILE_CACHE &&
+			 (newcaps & CEPH_CAP_FILE_LAZYIO) == 0)
 			; /* do nothing yet, invalidation will be queued */
 		else if (cap == ci->i_auth_cap)
 			check_caps = 1; /* check auth cap only */

fs/ceph/mds_client.c

@@ -1776,7 +1776,8 @@ static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg)
 	}
 	/* The inode has cached pages, but it's no longer used.
 	 * we can safely drop it */
-	if (wanted == 0 && used == CEPH_CAP_FILE_CACHE &&
+	if (S_ISREG(inode->i_mode) &&
+	    wanted == 0 && used == CEPH_CAP_FILE_CACHE &&
 	    !(oissued & CEPH_CAP_FILE_CACHE)) {
 	  used = 0;
 	  oissued = 0;

fs/ceph/super.h

@@ -675,17 +675,7 @@ extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
 extern int __ceph_caps_used(struct ceph_inode_info *ci);
 
 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
-
-/*
- * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
- */
-static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
-{
-	int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
-	if (w & CEPH_CAP_FILE_BUFFER)
-		w |= CEPH_CAP_FILE_EXCL;  /* we want EXCL if dirty data */
-	return w;
-}
+extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
 
 /* what the mds thinks we want */
 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);