X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fzfs_vfsops.c;h=fb319a547a93d9b305bb39df77979d5c5ed66e69;hb=ab26409db753bb087842ab6f1af943f3386c764f;hp=0ee541358cd67a0a3b2553246666c6b82341e025;hpb=baab0630167f7539483af0f277aa6eeff39490d6;p=zfs.git

diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c
index 0ee5413..fb319a5 100644
--- a/module/zfs/zfs_vfsops.c
+++ b/module/zfs/zfs_vfsops.c
@@ -140,10 +140,16 @@ xattr_changed_cb(void *arg, uint64_t newval)
 {
 	zfs_sb_t *zsb = arg;
 
-	if (newval == TRUE)
-		zsb->z_flags |= ZSB_XATTR;
-	else
+	if (newval == ZFS_XATTR_OFF) {
 		zsb->z_flags &= ~ZSB_XATTR;
+	} else {
+		zsb->z_flags |= ZSB_XATTR;
+
+		if (newval == ZFS_XATTR_SA)
+			zsb->z_xattr_sa = B_TRUE;
+		else
+			zsb->z_xattr_sa = B_FALSE;
+	}
 }
 
 static void
@@ -600,12 +606,6 @@ zfs_sb_create(const char *osname, zfs_sb_t **zsbp)
 	zsb->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;
 	zsb->z_os = os;
 
-	error = -bdi_init(&zsb->z_bdi);
-	if (error) {
-		kmem_free(zsb, sizeof (zfs_sb_t));
-		return (error);
-	}
-
 	error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zsb->z_version);
 	if (error) {
 		goto out;
@@ -646,7 +646,11 @@ zfs_sb_create(const char *osname, zfs_sb_t **zsbp)
 		error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1,
 		    &sa_obj);
 		if (error)
-			return (error);
+			goto out;
+
+		error = zfs_get_zplprop(os, ZFS_PROP_XATTR, &zval);
+		if ((error == 0) && (zval == ZFS_XATTR_SA))
+			zsb->z_xattr_sa = B_TRUE;
 	} else {
 		/*
 		 * Pre SA versions file systems should never touch
@@ -715,8 +719,9 @@ out:
 	kmem_free(zsb, sizeof (zfs_sb_t));
 	return (error);
 }
+EXPORT_SYMBOL(zfs_sb_create);
 
-static int
+int
 zfs_sb_setup(zfs_sb_t *zsb, boolean_t mounting)
 {
 	int error;
@@ -797,6 +802,7 @@ zfs_sb_setup(zfs_sb_t *zsb, boolean_t mounting)
 
 	return (0);
 }
+EXPORT_SYMBOL(zfs_sb_setup);
 
 void
 zfs_sb_free(zfs_sb_t *zsb)
@@ -805,7 +811,6 @@ zfs_sb_free(zfs_sb_t *zsb)
 
 	zfs_fuid_destroy(zsb);
 
-	bdi_destroy(&zsb->z_bdi);
 	mutex_destroy(&zsb->z_znodes_lock);
 	mutex_destroy(&zsb->z_lock);
 	list_destroy(&zsb->z_all_znodes);
@@ -816,6 +821,7 @@ zfs_sb_free(zfs_sb_t *zsb)
 		mutex_destroy(&zsb->z_hold_mtx[i]);
 	kmem_free(zsb, sizeof (zfs_sb_t));
 }
+EXPORT_SYMBOL(zfs_sb_free);
 
 static void
 zfs_set_fuid_feature(zfs_sb_t *zsb)
@@ -899,6 +905,7 @@ zfs_check_global_label(const char *dsname, const char *hexsl)
 	}
 	return (EACCES);
 }
+EXPORT_SYMBOL(zfs_check_global_label);
 #endif /* HAVE_MLSLABEL */
 
 int
@@ -979,6 +986,26 @@ zfs_root(zfs_sb_t *zsb, struct inode **ipp)
 }
 EXPORT_SYMBOL(zfs_root);
 
+#ifdef HAVE_SHRINK
+int
+zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
+{
+	zfs_sb_t *zsb = sb->s_fs_info;
+	struct shrinker *shrinker = &sb->s_shrink;
+	struct shrink_control sc = {
+		.nr_to_scan = nr_to_scan,
+		.gfp_mask = GFP_KERNEL,
+	};
+
+	ZFS_ENTER(zsb);
+	*objects = (*shrinker->shrink)(shrinker, &sc);
+	ZFS_EXIT(zsb);
+
+	return (0);
+}
+EXPORT_SYMBOL(zfs_sb_prune);
+#endif /* HAVE_SHRINK */
+
 /*
  * Teardown the zfs_sb_t::z_os.
  *
@@ -986,7 +1013,7 @@ EXPORT_SYMBOL(zfs_root);
  * and 'z_teardown_inactive_lock' held.
  */
 int
-zfsvfs_teardown(zfs_sb_t *zsb, boolean_t unmounting)
+zfs_sb_teardown(zfs_sb_t *zsb, boolean_t unmounting)
 {
 	znode_t	*zp;
 
@@ -1083,10 +1110,11 @@ zfsvfs_teardown(zfs_sb_t *zsb, boolean_t unmounting)
 
 	return (0);
 }
+EXPORT_SYMBOL(zfs_sb_teardown);
 
-#ifdef HAVE_BDI
-static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
-#endif /* HAVE_BDI */
+#if defined(HAVE_BDI) && !defined(HAVE_BDI_SETUP_AND_REGISTER)
+atomic_long_t zfs_bdi_seq = ATOMIC_LONG_INIT(0);
+#endif /* HAVE_BDI && !HAVE_BDI_SETUP_AND_REGISTER */
 
 int
 zfs_domount(struct super_block *sb, void *data, int silent)
@@ -1113,7 +1141,23 @@ zfs_domount(struct super_block *sb, void *data, int silent)
 	sb->s_time_gran = 1;
 	sb->s_blocksize = recordsize;
 	sb->s_blocksize_bits = ilog2(recordsize);
-	bdi_put_sb(sb, NULL);
+
+#ifdef HAVE_BDI
+	/*
+	 * 2.6.32 API change,
+	 * Added backing_device_info (BDI) per super block interfaces.  A BDI
+	 * must be configured when using a non-device backed filesystem for
+	 * proper writeback.  This is not required for older pdflush kernels.
+	 *
+	 * NOTE: Linux read-ahead is disabled in favor of zfs read-ahead.
+	 */
+	zsb->z_bdi.ra_pages = 0;
+	sb->s_bdi = &zsb->z_bdi;
+
+	error = -bdi_setup_and_register(&zsb->z_bdi, "zfs", BDI_CAP_MAP_COPY);
+	if (error)
+		goto out;
+#endif /* HAVE_BDI */
 
 	/* Set callback operations for the file system. */
 	sb->s_op = &zpl_super_operations;
@@ -1138,16 +1182,6 @@ zfs_domount(struct super_block *sb, void *data, int silent)
 		dmu_objset_set_user(zsb->z_os, zsb);
 		mutex_exit(&zsb->z_os->os_user_ptr_lock);
 	} else {
-		/* Disable Linux read-ahead handled by lower layers */
-		zsb->z_bdi.ra_pages = 0;
-
-		error = -bdi_register(&zsb->z_bdi, NULL, "zfs-%d",
-		    atomic_long_inc_return(&bdi_seq));
-		if (error)
-			goto out;
-
-		bdi_put_sb(sb, &zsb->z_bdi);
-
 		error = zfs_sb_setup(zsb, B_TRUE);
 #ifdef HAVE_SNAPSHOT
 		(void) zfs_snap_create(zsb);
@@ -1185,13 +1219,12 @@ zfs_umount(struct super_block *sb)
 	zfs_sb_t *zsb = sb->s_fs_info;
 	objset_t *os;
 
-	VERIFY(zfsvfs_teardown(zsb, B_TRUE) == 0);
+	VERIFY(zfs_sb_teardown(zsb, B_TRUE) == 0);
 	os = zsb->z_os;
 
-	if (bdi_get_sb(sb)) {
-		bdi_unregister(bdi_get_sb(sb));
-		bdi_put_sb(sb, NULL);
-	}
+#ifdef HAVE_BDI
+	bdi_destroy(sb->s_bdi);
+#endif /* HAVE_BDI */
 
 	/*
 	 * z_os will be NULL if there was an error in
@@ -1332,7 +1365,7 @@ zfs_suspend_fs(zfs_sb_t *zsb)
 {
 	int error;
 
-	if ((error = zfsvfs_teardown(zsb, B_FALSE)) != 0)
+	if ((error = zfs_sb_teardown(zsb, B_FALSE)) != 0)
 		return (error);
 	dmu_objset_disown(zsb->z_os, zsb);
 
@@ -1512,6 +1545,7 @@ zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value)
 	}
 	return (error);
 }
+EXPORT_SYMBOL(zfs_get_zplprop);
 
 void
 zfs_init(void)
@@ -1519,6 +1553,7 @@ zfs_init(void)
 	zfs_znode_init();
 	dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb);
 	register_filesystem(&zpl_fs_type);
+	(void) arc_add_prune_callback(zpl_prune_sbs, NULL);
 }
 
 void