X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fzfs_vfsops.c;h=8a82d9d4b226ecbe4514545b5f95145977a04cf0;hb=e30c0ada6d0174e044b96fbedf5946c3be66e956;hp=1763d171a06ddf9f7d15f99a73b2c0a0712c037f;hpb=3558fd73b5d863304102f6745c26e0b592aca60a;p=zfs.git

diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c
index 1763d17..8a82d9d 100644
--- a/module/zfs/zfs_vfsops.c
+++ b/module/zfs/zfs_vfsops.c
@@ -69,8 +69,10 @@
 
 /*ARGSUSED*/
 int
-zfs_sync(zfs_sb_t *zsb, short flag, cred_t *cr)
+zfs_sync(struct super_block *sb, int wait, cred_t *cr)
 {
+	zfs_sb_t *zsb = sb->s_fs_info;
+
 	/*
 	 * Data integrity is job one.  We don't want a compromised kernel
 	 * writing to the storage pool, so we never sync during panic.
@@ -78,6 +80,13 @@ zfs_sync(zfs_sb_t *zsb, short flag, cred_t *cr)
 	if (unlikely(oops_in_progress))
 		return (0);
 
+	/*
+	 * Semantically, the only requirement is that the sync be initiated.
+	 * The DMU syncs out txgs frequently, so there's nothing to do.
+	 */
+	if (!wait)
+		return (0);
+
 	if (zsb != NULL) {
 		/*
 		 * Sync a specific filesystem.
@@ -87,19 +96,14 @@ zfs_sync(zfs_sb_t *zsb, short flag, cred_t *cr)
 		ZFS_ENTER(zsb);
 		dp = dmu_objset_pool(zsb->z_os);
 
-#ifdef HAVE_SHUTDOWN
 		/*
 		 * If the system is shutting down, then skip any
 		 * filesystems which may exist on a suspended pool.
-		 *
-		 * XXX: This can be implemented using the Linux reboot
-		 *      notifiers: {un}register_reboot_notifier().
 		 */
-		if (sys_shutdown && spa_suspended(dp->dp_spa)) {
+		if (spa_suspended(dp->dp_spa)) {
 			ZFS_EXIT(zsb);
 			return (0);
 		}
-#endif /* HAVE_SHUTDOWN */
 
 		if (zsb->z_log != NULL)
 			zil_commit(zsb->z_log, 0);
@@ -997,11 +1001,15 @@ zfs_statvfs(struct dentry *dentry, struct kstatfs *statp)
 	    &refdbytes, &availbytes, &usedobjs, &availobjs);
 
 	/*
-	 * The underlying storage pool actually uses multiple block sizes.
-	 * We report the fragsize as the smallest block size we support,
-	 * and we report our blocksize as the filesystem's maximum blocksize.
+	 * The underlying storage pool actually uses multiple block
+	 * size.  Under Solaris frsize (fragment size) is reported as
+	 * the smallest block size we support, and bsize (block size)
+	 * as the filesystem's maximum block size.  Unfortunately,
+	 * under Linux the fragment size and block size are often used
+	 * interchangeably.  Thus we are forced to report both of them
+	 * as the filesystem's maximum block size.
 	 */
-	statp->f_frsize = 1UL << SPA_MINBLOCKSHIFT;
+	statp->f_frsize = zsb->z_max_blksz;
 	statp->f_bsize = zsb->z_max_blksz;
 	bshift = fls(statp->f_bsize) - 1;
 
@@ -1025,7 +1033,7 @@ zfs_statvfs(struct dentry *dentry, struct kstatfs *statp)
 	 */
 	statp->f_ffree = MIN(availobjs, statp->f_bfree);
 	statp->f_files = statp->f_ffree + usedobjs;
-	statp->f_fsid.val[0] = 0; /* XXX: Map up some unique ID */
+	statp->f_fsid.val[0] = dentry->d_sb->s_dev;
 	statp->f_fsid.val[1] = 0;
 	statp->f_type = ZFS_SUPER_MAGIC;
 	statp->f_namelen = ZFS_MAXNAMELEN;
@@ -1071,17 +1079,17 @@ zfsvfs_teardown(zfs_sb_t *zsb, boolean_t unmounting)
 
 	rrw_enter(&zsb->z_teardown_lock, RW_WRITER, FTAG);
 
-#ifdef HAVE_DNLC
 	if (!unmounting) {
 		/*
-		 * We purge the parent filesystem's vfsp as the parent
-		 * filesystem and all of its snapshots have their vnode's
-		 * v_vfsp set to the parent's filesystem's vfsp.  Note,
-		 * 'z_parent' is self referential for non-snapshots.
+		 * We purge the parent filesystem's super block as the
+		 * parent filesystem and all of its snapshots have their
+		 * inode's super block set to the parent's filesystem's
+		 * super block.  Note,  'z_parent' is self referential
+		 * for non-snapshots.
 		 */
-		(void) dnlc_purge_vfsp(zsb->z_parent->z_vfs, 0);
+		shrink_dcache_sb(zsb->z_parent->z_sb);
+		(void) spl_invalidate_inodes(zsb->z_parent->z_sb, 0);
 	}
-#endif /* HAVE_DNLC */
 
 	/*
 	 * Close the zil. NB: Can't close the zil while zfs_inactive
@@ -1284,6 +1292,46 @@ zfs_umount(struct super_block *sb)
 EXPORT_SYMBOL(zfs_umount);
 
 int
+zfs_remount(struct super_block *sb, int *flags, char *data)
+{
+	zfs_sb_t *zsb = sb->s_fs_info;
+	boolean_t readonly = B_FALSE;
+	boolean_t setuid = B_TRUE;
+	boolean_t exec = B_TRUE;
+	boolean_t devices = B_TRUE;
+	boolean_t atime = B_TRUE;
+
+	if (*flags & MS_RDONLY)
+		readonly = B_TRUE;
+
+	if (*flags & MS_NOSUID) {
+		devices = B_FALSE;
+		setuid = B_FALSE;
+	} else {
+		if (*flags & MS_NODEV)
+			devices = B_FALSE;
+	}
+
+	if (*flags & MS_NOEXEC)
+		exec = B_FALSE;
+
+	if (*flags & MS_NOATIME)
+		atime = B_FALSE;
+
+	/*
+	 * Invoke our callbacks to set required flags.
+	 */
+	readonly_changed_cb(zsb, readonly);
+	setuid_changed_cb(zsb, setuid);
+	exec_changed_cb(zsb, exec);
+	devices_changed_cb(zsb, devices);
+	atime_changed_cb(zsb, atime);
+
+	return (0);
+}
+EXPORT_SYMBOL(zfs_remount);
+
+int
 zfs_vget(struct vfsmount *vfsp, struct inode **ipp, fid_t *fidp)
 {
 	zfs_sb_t	*zsb = VTOZSB(vfsp);