orangefs: Cache getattr results.

The userspace component attempts to do this, but this will prevent
us from even needing to go into userspace to satisfy certain getattr
requests.
Signed-off-by: Martin Brandenburg <martin@omnibond.com>

fs/orangefs/inode.c

@@ -262,7 +262,7 @@ int orangefs_getattr(struct vfsmount *mnt,
 		     "orangefs_getattr: called on %s\n",
 		     dentry->d_name.name);
 
-	ret = orangefs_inode_getattr(inode, 0, 1);
+	ret = orangefs_inode_getattr(inode, 0, 0);
 	if (ret == 0) {
 		generic_fillattr(inode, kstat);
 
@@ -384,7 +384,7 @@ struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref
 	if (!inode || !(inode->i_state & I_NEW))
 		return inode;
 
-	error = orangefs_inode_getattr(inode, 1, 0);
+	error = orangefs_inode_getattr(inode, 1, 1);
 	if (error) {
 		iget_failed(inode);
 		return ERR_PTR(error);
@@ -429,7 +429,7 @@ struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
 	orangefs_set_inode(inode, ref);
 	inode->i_ino = hash;	/* needed for stat etc */
 
-	error = orangefs_inode_getattr(inode, 1, 0);
+	error = orangefs_inode_getattr(inode, 1, 1);
 	if (error)
 		goto out_iput;
 

fs/orangefs/namei.c

@@ -73,6 +73,7 @@ static int orangefs_create(struct inode *dir,
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	dentry->d_time = jiffies + HZ;
+	ORANGEFS_I(inode)->getattr_time = 0;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: dentry instantiated for %s\n",
@@ -192,6 +193,8 @@ static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
 		goto out;
 	}
 
+	ORANGEFS_I(inode)->getattr_time = 0;
+
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s:%s:%d "
 		     "Found good inode [%lu] with count [%d]\n",
@@ -320,6 +323,7 @@ static int orangefs_symlink(struct inode *dir,
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	dentry->d_time = jiffies + HZ;
+	ORANGEFS_I(inode)->getattr_time = 0;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Symlink) %pU -> %s\n",
@@ -383,6 +387,7 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	dentry->d_time = jiffies + HZ;
+	ORANGEFS_I(inode)->getattr_time = 0;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Directory) %pU -> %s\n",
@@ -413,6 +418,8 @@ static int orangefs_rename(struct inode *old_dir,
 		     "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
 		     old_dentry, new_dentry, d_count(new_dentry));
 
+	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = 0;
+
 	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
 	if (!new_op)
 		return -EINVAL;

fs/orangefs/orangefs-kernel.h

@@ -246,6 +246,8 @@ struct orangefs_inode_s {
 	 * with this object
 	 */
 	unsigned long pinode_flags;
+
+	unsigned long getattr_time;
 };
 
 #define P_ATIME_FLAG 0
@@ -527,7 +529,7 @@ int orangefs_inode_setxattr(struct inode *inode,
 			 size_t size,
 			 int flags);
 
-int orangefs_inode_getattr(struct inode *inode, int new, int size);
+int orangefs_inode_getattr(struct inode *inode, int new, int bypass);
 
 int orangefs_inode_check_changed(struct inode *inode);
 

fs/orangefs/orangefs-utils.c

@@ -251,7 +251,7 @@ static int orangefs_inode_is_stale(struct inode *inode, int new,
 	return 0;
 }
 
-int orangefs_inode_getattr(struct inode *inode, int new, int size)
+int orangefs_inode_getattr(struct inode *inode, int new, int bypass)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_kernel_op_s *new_op;
@@ -261,12 +261,16 @@ int orangefs_inode_getattr(struct inode *inode, int new, int size)
 	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
 	    get_khandle_from_ino(inode));
 
+	if (!new && !bypass) {
+		if (orangefs_inode->getattr_time > jiffies)
+			return 0;
+	}
+
 	new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
 	if (!new_op)
 		return -ENOMEM;
 	new_op->upcall.req.getattr.refn = orangefs_inode->refn;
-	new_op->upcall.req.getattr.mask = size ?
-	    ORANGEFS_ATTR_SYS_ALL_NOHINT : ORANGEFS_ATTR_SYS_ALL_NOHINT_NOSIZE;
+	new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
 
 	ret = service_operation(new_op, __func__,
 	    get_interruptible_flag(inode));
@@ -287,20 +291,18 @@ int orangefs_inode_getattr(struct inode *inode, int new, int size)
 	case S_IFREG:
 		inode->i_flags = orangefs_inode_flags(&new_op->
 		    downcall.resp.getattr.attributes);
-		if (size) {
-			inode_size = (loff_t)new_op->
-			    downcall.resp.getattr.attributes.size;
-			rounded_up_size =
-			    (inode_size + (4096 - (inode_size % 4096)));
-			inode->i_size = inode_size;
-			orangefs_inode->blksize =
-			    new_op->downcall.resp.getattr.attributes.blksize;
-			spin_lock(&inode->i_lock);
-			inode->i_bytes = inode_size;
-			inode->i_blocks =
-			    (unsigned long)(rounded_up_size / 512);
-			spin_unlock(&inode->i_lock);
-		}
+		inode_size = (loff_t)new_op->
+		    downcall.resp.getattr.attributes.size;
+		rounded_up_size =
+		    (inode_size + (4096 - (inode_size % 4096)));
+		inode->i_size = inode_size;
+		orangefs_inode->blksize =
+		    new_op->downcall.resp.getattr.attributes.blksize;
+		spin_lock(&inode->i_lock);
+		inode->i_bytes = inode_size;
+		inode->i_blocks =
+		    (unsigned long)(rounded_up_size / 512);
+		spin_unlock(&inode->i_lock);
 		break;
 	case S_IFDIR:
 		inode->i_size = PAGE_SIZE;
@@ -345,6 +347,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int size)
 	inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) |
 	    orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes);
 
+	orangefs_inode->getattr_time = jiffies + HZ;
 	ret = 0;
 out:
 	op_release(new_op);
@@ -418,6 +421,7 @@ int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr)
 		ClearMtimeFlag(orangefs_inode);
 		ClearCtimeFlag(orangefs_inode);
 		ClearModeFlag(orangefs_inode);
+		orangefs_inode->getattr_time = 0;
 	}
 
 	return ret;

fs/orangefs/protocol.h

@@ -207,14 +207,6 @@ typedef __s64 ORANGEFS_offset;
 	 ORANGEFS_ATTR_SYS_DIRENT_COUNT		|	\
 	 ORANGEFS_ATTR_SYS_BLKSIZE)
 
-#define ORANGEFS_ATTR_SYS_ALL_NOHINT_NOSIZE		\
-	(ORANGEFS_ATTR_SYS_COMMON_ALL		|	\
-	 ORANGEFS_ATTR_SYS_LNK_TARGET		|	\
-	 ORANGEFS_ATTR_SYS_DFILE_COUNT		|	\
-	 ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT	|	\
-	 ORANGEFS_ATTR_SYS_DIRENT_COUNT		|	\
-	 ORANGEFS_ATTR_SYS_BLKSIZE)
-
 #define ORANGEFS_XATTR_REPLACE 0x2
 #define ORANGEFS_XATTR_CREATE  0x1
 #define ORANGEFS_MAX_SERVER_ADDR_LEN 256