X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fzfs_ctldir.c;h=51b12a1d50e4f766e8e97039e74f13d4d9508006;hb=6283f55ea1b91e680386388c17d14b89e344fa8d;hp=208fc36295d077f33619d2f9fe2c24eb9059a940;hpb=172bb4bd5e4afef721dd4d2972d8680d983f144b;p=zfs.git

diff --git a/module/zfs/zfs_ctldir.c b/module/zfs/zfs_ctldir.c
index 208fc36..51b12a1 100644
--- a/module/zfs/zfs_ctldir.c
+++ b/module/zfs/zfs_ctldir.c
@@ -19,12 +19,9 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * ZFS control directory (a.k.a. ".zfs")
  *
@@ -66,6 +63,8 @@
  * so that it cannot be freed until all snapshots have been unmounted.
  */
 
+#ifdef HAVE_ZPL
+
 #include <fs/fs_subr.h>
 #include <sys/zfs_ctldir.h>
 #include <sys/zfs_ioctl.h>
@@ -116,12 +115,16 @@ snapentry_compare(const void *a, const void *b)
 vnodeops_t *zfsctl_ops_root;
 vnodeops_t *zfsctl_ops_snapdir;
 vnodeops_t *zfsctl_ops_snapshot;
+vnodeops_t *zfsctl_ops_shares;
+vnodeops_t *zfsctl_ops_shares_dir;
 
 static const fs_operation_def_t zfsctl_tops_root[];
 static const fs_operation_def_t zfsctl_tops_snapdir[];
 static const fs_operation_def_t zfsctl_tops_snapshot[];
+static const fs_operation_def_t zfsctl_tops_shares[];
 
 static vnode_t *zfsctl_mknode_snapdir(vnode_t *);
+static vnode_t *zfsctl_mknode_shares(vnode_t *);
 static vnode_t *zfsctl_snapshot_mknode(vnode_t *, uint64_t objset);
 static int zfsctl_unmount_snap(zfs_snapentry_t *, int, cred_t *);
 
@@ -129,14 +132,18 @@ static gfs_opsvec_t zfsctl_opsvec[] = {
 	{ ".zfs", zfsctl_tops_root, &zfsctl_ops_root },
 	{ ".zfs/snapshot", zfsctl_tops_snapdir, &zfsctl_ops_snapdir },
 	{ ".zfs/snapshot/vnode", zfsctl_tops_snapshot, &zfsctl_ops_snapshot },
+	{ ".zfs/shares", zfsctl_tops_shares, &zfsctl_ops_shares_dir },
+	{ ".zfs/shares/vnode", zfsctl_tops_shares, &zfsctl_ops_shares },
 	{ NULL }
 };
 
 /*
- * Root directory elements.  We have only a single static entry, 'snapshot'.
+ * Root directory elements.  We only have two entries
+ * snapshot and shares.
  */
 static gfs_dirent_t zfsctl_root_entries[] = {
 	{ "snapshot", zfsctl_mknode_snapdir, GFS_CACHE_VNODE },
+	{ "shares", zfsctl_mknode_shares, GFS_CACHE_VNODE },
 	{ NULL }
 };
 
@@ -168,21 +175,45 @@ zfsctl_fini(void)
 		vn_freevnodeops(zfsctl_ops_snapdir);
 	if (zfsctl_ops_snapshot)
 		vn_freevnodeops(zfsctl_ops_snapshot);
+	if (zfsctl_ops_shares)
+		vn_freevnodeops(zfsctl_ops_shares);
+	if (zfsctl_ops_shares_dir)
+		vn_freevnodeops(zfsctl_ops_shares_dir);
 
 	zfsctl_ops_root = NULL;
 	zfsctl_ops_snapdir = NULL;
 	zfsctl_ops_snapshot = NULL;
+	zfsctl_ops_shares = NULL;
+	zfsctl_ops_shares_dir = NULL;
+}
+
+boolean_t
+zfsctl_is_node(vnode_t *vp)
+{
+	return (vn_matchops(vp, zfsctl_ops_root) ||
+	    vn_matchops(vp, zfsctl_ops_snapdir) ||
+	    vn_matchops(vp, zfsctl_ops_snapshot) ||
+	    vn_matchops(vp, zfsctl_ops_shares) ||
+	    vn_matchops(vp, zfsctl_ops_shares_dir));
+
 }
 
 /*
- * Return the inode number associated with the 'snapshot' directory.
+ * Return the inode number associated with the 'snapshot' or
+ * 'shares' directory.
  */
 /* ARGSUSED */
 static ino64_t
 zfsctl_root_inode_cb(vnode_t *vp, int index)
 {
-	ASSERT(index == 0);
-	return (ZFSCTL_INO_SNAPDIR);
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+
+	ASSERT(index <= 2);
+
+	if (index == 0)
+		return (ZFSCTL_INO_SNAPDIR);
+
+	return (zfsvfs->z_shares_dir);
 }
 
 /*
@@ -196,6 +227,7 @@ zfsctl_create(zfsvfs_t *zfsvfs)
 {
 	vnode_t *vp, *rvp;
 	zfsctl_node_t *zcp;
+	uint64_t crtime[2];
 
 	ASSERT(zfsvfs->z_ctldir == NULL);
 
@@ -206,7 +238,9 @@ zfsctl_create(zfsvfs_t *zfsvfs)
 	zcp->zc_id = ZFSCTL_INO_ROOT;
 
 	VERIFY(VFS_ROOT(zfsvfs->z_vfs, &rvp) == 0);
-	ZFS_TIME_DECODE(&zcp->zc_cmtime, VTOZ(rvp)->z_phys->zp_crtime);
+	VERIFY(0 == sa_lookup(VTOZ(rvp)->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs),
+	    &crtime, sizeof (crtime)));
+	ZFS_TIME_DECODE(&zcp->zc_cmtime, crtime);
 	VN_RELE(rvp);
 
 	/*
@@ -275,8 +309,13 @@ static int
 zfsctl_common_access(vnode_t *vp, int mode, int flags, cred_t *cr,
     caller_context_t *ct)
 {
-	if (mode & VWRITE)
-		return (EACCES);
+	if (flags & V_ACE_MASK) {
+		if (mode & ACE_ALL_WRITE_PERMS)
+			return (EACCES);
+	} else {
+		if (mode & VWRITE)
+			return (EACCES);
+	}
 
 	return (0);
 }
@@ -287,14 +326,13 @@ zfsctl_common_access(vnode_t *vp, int mode, int flags, cred_t *cr,
 static void
 zfsctl_common_getattr(vnode_t *vp, vattr_t *vap)
 {
-	zfsctl_node_t	*zcp = vp->v_data;
 	timestruc_t	now;
 
 	vap->va_uid = 0;
 	vap->va_gid = 0;
 	vap->va_rdev = 0;
 	/*
-	 * We are a purly virtual object, so we have no
+	 * We are a purely virtual object, so we have no
 	 * blocksize or allocated blocks.
 	 */
 	vap->va_blksize = 0;
@@ -309,7 +347,6 @@ zfsctl_common_getattr(vnode_t *vp, vattr_t *vap)
 	 */
 	gethrestime(&now);
 	vap->va_atime = now;
-	vap->va_mtime = vap->va_ctime = zcp->zc_cmtime;
 }
 
 /*ARGSUSED*/
@@ -345,6 +382,30 @@ zfsctl_common_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
 	return (0);
 }
 
+
+/*ARGSUSED*/
+static int
+zfsctl_shares_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
+{
+	zfsvfs_t	*zfsvfs = vp->v_vfsp->vfs_data;
+	znode_t		*dzp;
+	int		error;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
+		error = VOP_FID(ZTOV(dzp), fidp, ct);
+		VN_RELE(ZTOV(dzp));
+	}
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
 /*
  * .zfs inode namespace
  *
@@ -368,10 +429,12 @@ zfsctl_root_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
     caller_context_t *ct)
 {
 	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	zfsctl_node_t *zcp = vp->v_data;
 
 	ZFS_ENTER(zfsvfs);
 	vap->va_nodeid = ZFSCTL_INO_ROOT;
 	vap->va_nlink = vap->va_size = NROOT_ENTRIES;
+	vap->va_mtime = vap->va_ctime = zcp->zc_cmtime;
 
 	zfsctl_common_getattr(vp, vap);
 	ZFS_EXIT(zfsvfs);
@@ -411,6 +474,22 @@ zfsctl_root_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
 	return (err);
 }
 
+static int
+zfsctl_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
+    caller_context_t *ct)
+{
+	/*
+	 * We only care about ACL_ENABLED so that libsec can
+	 * display ACL correctly and not default to POSIX draft.
+	 */
+	if (cmd == _PC_ACL_ENABLED) {
+		*valp = _ACL_ACE_ENABLED;
+		return (0);
+	}
+
+	return (fs_pathconf(vp, cmd, valp, cr, ct));
+}
+
 static const fs_operation_def_t zfsctl_tops_root[] = {
 	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
 	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
@@ -421,6 +500,7 @@ static const fs_operation_def_t zfsctl_tops_root[] = {
 	{ VOPNAME_LOOKUP,	{ .vop_lookup = zfsctl_root_lookup }	},
 	{ VOPNAME_SEEK,		{ .vop_seek = fs_seek }			},
 	{ VOPNAME_INACTIVE,	{ .vop_inactive = gfs_vop_inactive }	},
+	{ VOPNAME_PATHCONF,	{ .vop_pathconf = zfsctl_pathconf }	},
 	{ VOPNAME_FID,		{ .vop_fid = zfsctl_common_fid	}	},
 	{ NULL }
 };
@@ -458,7 +538,7 @@ zfsctl_unmount_snap(zfs_snapentry_t *sep, int fflags, cred_t *cr)
 		VN_RELE(svp);
 		return (error);
 	}
-	VFS_RELE(svp->v_vfsp);
+
 	/*
 	 * We can't use VN_RELE(), as that will try to invoke
 	 * zfsctl_snapdir_inactive(), which would cause us to destroy
@@ -512,7 +592,7 @@ zfsctl_rename_snap(zfsctl_snapdir_t *sdp, zfs_snapentry_t *sep, const char *nm)
 	ASSERT3U(strlen(newpath) + strlen(nm), <, sizeof (newpath));
 	(void) strcat(newpath, nm);
 	refstr_rele(pathref);
-	vfs_setmntpoint(vfsp, newpath);
+	vfs_setmntpoint(vfsp, newpath, 0);
 
 	pathref = vfs_getresource(vfsp);
 	(void) strncpy(newpath, refstr_value(pathref), sizeof (newpath));
@@ -521,7 +601,7 @@ zfsctl_rename_snap(zfsctl_snapdir_t *sdp, zfs_snapentry_t *sep, const char *nm)
 	ASSERT3U(strlen(newpath) + strlen(nm), <, sizeof (newpath));
 	(void) strcat(newpath, nm);
 	refstr_rele(pathref);
-	vfs_setresource(vfsp, newpath);
+	vfs_setresource(vfsp, newpath, 0);
 
 	vfs_unlock(vfsp);
 }
@@ -635,7 +715,7 @@ zfsctl_snapdir_remove(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
 		if (err)
 			avl_add(&sdp->sd_snaps, sep);
 		else
-			err = dmu_objset_destroy(snapname);
+			err = dmu_objset_destroy(snapname, B_FALSE);
 	} else {
 		err = ENOENT;
 	}
@@ -671,7 +751,8 @@ zfsctl_snapdir_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t  **vpp,
 		return (err);
 
 	if (err == 0) {
-		err = dmu_objset_snapshot(name, dirname, B_FALSE);
+		err = dmu_objset_snapshot(name, dirname, NULL, NULL,
+		    B_FALSE, B_FALSE, -1);
 		if (err)
 			return (err);
 		err = lookupnameat(dirname, seg, follow, NULL, vpp, dvp);
@@ -712,9 +793,6 @@ zfsctl_snapdir_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
 
 	ASSERT(dvp->v_type == VDIR);
 
-	if (gfs_lookup_dot(vpp, dvp, zfsvfs->z_ctldir, nm) == 0)
-		return (0);
-
 	/*
 	 * If we get a recursive call, that means we got called
 	 * from the domount() code while it was trying to look up the
@@ -726,6 +804,11 @@ zfsctl_snapdir_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
 
 	ZFS_ENTER(zfsvfs);
 
+	if (gfs_lookup_dot(vpp, dvp, zfsvfs->z_ctldir, nm) == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
 	if (flags & FIGNORECASE) {
 		boolean_t conflict = B_FALSE;
 
@@ -786,8 +869,7 @@ zfsctl_snapdir_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
 		 */
 		return (err == EILSEQ ? ENOENT : err);
 	}
-	if (dmu_objset_open(snapname, DMU_OST_ZFS,
-	    DS_MODE_USER | DS_MODE_READONLY, &snap) != 0) {
+	if (dmu_objset_hold(snapname, FTAG, &snap) != 0) {
 		mutex_exit(&sdp->sd_lock);
 		ZFS_EXIT(zfsvfs);
 		return (ENOENT);
@@ -799,7 +881,7 @@ zfsctl_snapdir_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
 	*vpp = sep->se_root = zfsctl_snapshot_mknode(dvp, dmu_objset_id(snap));
 	avl_insert(&sdp->sd_snaps, sep, where);
 
-	dmu_objset_close(snap);
+	dmu_objset_rele(snap, FTAG);
 domount:
 	mountpoint_len = strlen(refstr_value(dvp->v_vfsp->vfs_mntpt)) +
 	    strlen("/.zfs/snapshot/") + strlen(nm) + 1;
@@ -824,7 +906,7 @@ domount:
 		 * Return the mounted root rather than the covered mount point.
 		 * Takes the GFS vnode at .zfs/snapshot/<snapname> and returns
 		 * the ZFS vnode mounted on top of the GFS node.  This ZFS
-		 * vnode is the root the newly created vfsp.
+		 * vnode is the root of the newly created vfsp.
 		 */
 		VFS_RELE(vfsp);
 		err = traverse(vpp);
@@ -859,6 +941,37 @@ domount:
 
 /* ARGSUSED */
 static int
+zfsctl_shares_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
+    int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp)
+{
+	zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
+	znode_t *dzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (gfs_lookup_dot(vpp, dvp, zfsvfs->z_ctldir, nm) == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0)
+		error = VOP_LOOKUP(ZTOV(dzp), nm, vpp, pnp,
+		    flags, rdir, cr, ct, direntflags, realpnp);
+
+	VN_RELE(ZTOV(dzp));
+	ZFS_EXIT(zfsvfs);
+
+	return (error);
+}
+
+/* ARGSUSED */
+static int
 zfsctl_snapdir_readdir_cb(vnode_t *vp, void *dp, int *eofp,
     offset_t *offp, offset_t *nextp, void *data, int flags)
 {
@@ -901,6 +1014,33 @@ zfsctl_snapdir_readdir_cb(vnode_t *vp, void *dp, int *eofp,
 	return (0);
 }
 
+/* ARGSUSED */
+static int
+zfsctl_shares_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp,
+    caller_context_t *ct, int flags)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	znode_t *dzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
+		error = VOP_READDIR(ZTOV(dzp), uiop, cr, eofp, ct, flags);
+		VN_RELE(ZTOV(dzp));
+	} else {
+		*eofp = 1;
+		error = ENOENT;
+	}
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
 /*
  * pvp is the '.zfs' directory (zfsctl_node_t).
  * Creates vp, which is '.zfs/snapshot' (zfsctl_snapdir_t).
@@ -926,6 +1066,45 @@ zfsctl_mknode_snapdir(vnode_t *pvp)
 	return (vp);
 }
 
+vnode_t *
+zfsctl_mknode_shares(vnode_t *pvp)
+{
+	vnode_t *vp;
+	zfsctl_node_t *sdp;
+
+	vp = gfs_dir_create(sizeof (zfsctl_node_t), pvp,
+	    zfsctl_ops_shares, NULL, NULL, MAXNAMELEN,
+	    NULL, NULL);
+	sdp = vp->v_data;
+	sdp->zc_cmtime = ((zfsctl_node_t *)pvp->v_data)->zc_cmtime;
+	return (vp);
+
+}
+
+/* ARGSUSED */
+static int
+zfsctl_shares_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	znode_t *dzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
+		error = VOP_GETATTR(ZTOV(dzp), vap, flags, cr, ct);
+		VN_RELE(ZTOV(dzp));
+	}
+	ZFS_EXIT(zfsvfs);
+	return (error);
+
+
+}
+
 /* ARGSUSED */
 static int
 zfsctl_snapdir_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
@@ -938,6 +1117,7 @@ zfsctl_snapdir_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
 	zfsctl_common_getattr(vp, vap);
 	vap->va_nodeid = gfs_file_inode(vp);
 	vap->va_nlink = vap->va_size = avl_numnodes(&sdp->sd_snaps) + 2;
+	vap->va_ctime = vap->va_mtime = dmu_objset_snap_cmtime(zfsvfs->z_os);
 	ZFS_EXIT(zfsvfs);
 
 	return (0);
@@ -976,6 +1156,20 @@ static const fs_operation_def_t zfsctl_tops_snapdir[] = {
 	{ NULL }
 };
 
+static const fs_operation_def_t zfsctl_tops_shares[] = {
+	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
+	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
+	{ VOPNAME_IOCTL,	{ .error = fs_inval }			},
+	{ VOPNAME_GETATTR,	{ .vop_getattr = zfsctl_shares_getattr } },
+	{ VOPNAME_ACCESS,	{ .vop_access = zfsctl_common_access }	},
+	{ VOPNAME_READDIR,	{ .vop_readdir = zfsctl_shares_readdir } },
+	{ VOPNAME_LOOKUP,	{ .vop_lookup = zfsctl_shares_lookup }	},
+	{ VOPNAME_SEEK,		{ .vop_seek = fs_seek }			},
+	{ VOPNAME_INACTIVE,	{ .vop_inactive = gfs_vop_inactive } },
+	{ VOPNAME_FID,		{ .vop_fid = zfsctl_shares_fid } },
+	{ NULL }
+};
+
 /*
  * pvp is the GFS vnode '.zfs/snapshot'.
  *
@@ -993,7 +1187,6 @@ zfsctl_snapshot_mknode(vnode_t *pvp, uint64_t objset)
 	    zfsctl_ops_snapshot, NULL, NULL, MAXNAMELEN, NULL, NULL);
 	zcp = vp->v_data;
 	zcp->zc_id = objset;
-	VFS_HOLD(vp->v_vfsp);
 
 	return (vp);
 }
@@ -1032,7 +1225,6 @@ zfsctl_snapshot_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
 
 	mutex_exit(&sdp->sd_lock);
 	VN_RELE(dvp);
-	VFS_RELE(vp->v_vfsp);
 
 	/*
 	 * Dispose of the vnode for the snapshot mount point.
@@ -1157,3 +1349,4 @@ zfsctl_umount_snapshots(vfs_t *vfsp, int fflags, cred_t *cr)
 
 	return (error);
 }
+#endif /* HAVE_ZPL */