From owner-svn-src-all@FreeBSD.ORG Fri Apr 19 10:35:46 2013 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 8250FC8F; Fri, 19 Apr 2013 10:35:46 +0000 (UTC) (envelope-from mm@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) by mx1.freebsd.org (Postfix) with ESMTP id 6536EAE6; Fri, 19 Apr 2013 10:35:46 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.6/8.14.6) with ESMTP id r3JAZkNm011485; Fri, 19 Apr 2013 10:35:46 GMT (envelope-from mm@svn.freebsd.org) Received: (from mm@localhost) by svn.freebsd.org (8.14.6/8.14.5/Submit) id r3JAZjTW011350; Fri, 19 Apr 2013 10:35:45 GMT (envelope-from mm@svn.freebsd.org) Message-Id: <201304191035.r3JAZjTW011350@svn.freebsd.org> From: Martin Matuska Date: Fri, 19 Apr 2013 10:35:45 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r249645 - in stable/8: cddl/contrib/opensolaris/cmd/zfs cddl/contrib/opensolaris/lib/libzfs/common sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: stable-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Apr 2013 10:35:46 -0000 Author: mm Date: Fri Apr 19 10:35:45 2013 New Revision: 249645 URL: http://svnweb.freebsd.org/changeset/base/249645 Log: MFC r240870 (pjd): It is possible to recursively destroy snapshots even if the snapshot doesn't exist on a dataset we are starting from. For example if we have the following configuration: tank tank/foo tank/foo@snap tank/bar tank/bar@snap We can execute: # zfs destroy -t tank@snap eventhough tank@snap doesn't exit. Unfortunately it is not possible to do the same with recursive rename: # zfs rename -r tank@snap tank@pans cannot open 'tank@snap': dataset does not exist ...until now. This change allows to recursively rename snapshots even if snapshot doesn't exist on the starting dataset. Sponsored by: rsync.net Modified: stable/8/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c Directory Properties: stable/8/cddl/contrib/opensolaris/ (props changed) stable/8/cddl/contrib/opensolaris/cmd/zfs/ (props changed) stable/8/cddl/contrib/opensolaris/lib/libzfs/ (props changed) stable/8/sys/ (props changed) stable/8/sys/cddl/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) Modified: stable/8/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c ============================================================================== --- stable/8/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c Fri Apr 19 10:16:00 2013 (r249644) +++ stable/8/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c Fri Apr 19 10:35:45 2013 (r249645) @@ -3070,6 +3070,7 @@ zfs_do_rename(int argc, char **argv) int ret = 0; int types; boolean_t parents = B_FALSE; + char *snapshot = NULL; /* check options */ while ((c = getopt(argc, argv, "fpru")) != -1) { @@ -3138,6 +3139,19 @@ zfs_do_rename(int argc, char **argv) else types = ZFS_TYPE_DATASET; + if (flags.recurse) { + /* + * When we do recursive rename we are fine when the given + * snapshot for the given dataset doesn't exist - it can + * still exists below. + */ + + snapshot = strchr(argv[0], '@'); + assert(snapshot != NULL); + *snapshot = '\0'; + snapshot++; + } + if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) return (1); @@ -3148,7 +3162,7 @@ zfs_do_rename(int argc, char **argv) return (1); } - ret = (zfs_rename(zhp, argv[1], flags) != 0); + ret = (zfs_rename(zhp, snapshot, argv[1], flags) != 0); zfs_close(zhp); return (ret); Modified: stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h ============================================================================== --- stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h Fri Apr 19 10:16:00 2013 (r249644) +++ stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h Fri Apr 19 10:35:45 2013 (r249645) @@ -571,7 +571,8 @@ typedef struct renameflags { int forceunmount : 1; } renameflags_t; -extern int zfs_rename(zfs_handle_t *, const char *, renameflags_t flags); +extern int zfs_rename(zfs_handle_t *, const char *, const char *, + renameflags_t flags); typedef struct sendflags { /* print informational messages (ie, -v was specified) */ Modified: stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c ============================================================================== --- stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c Fri Apr 19 10:16:00 2013 (r249644) +++ stable/8/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c Fri Apr 19 10:35:45 2013 (r249645) @@ -611,6 +611,22 @@ zfs_open(libzfs_handle_t *hdl, const cha return (NULL); } + if (zhp == NULL) { + char *at = strchr(path, '@'); + + if (at != NULL) + *at = '\0'; + errno = 0; + if ((zhp = make_dataset_handle(hdl, path)) == NULL) { + (void) zfs_standard_error(hdl, errno, errbuf); + return (NULL); + } + if (at != NULL) + *at = '@'; + (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); + zhp->zfs_type = ZFS_TYPE_SNAPSHOT; + } + if (!(types & zhp->zfs_type)) { (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); zfs_close(zhp); @@ -3614,7 +3630,8 @@ zfs_rollback(zfs_handle_t *zhp, zfs_hand * Renames the given dataset. */ int -zfs_rename(zfs_handle_t *zhp, const char *target, renameflags_t flags) +zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, + renameflags_t flags) { int ret; zfs_cmd_t zc = { 0 }; @@ -3634,6 +3651,18 @@ zfs_rename(zfs_handle_t *zhp, const char (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, "cannot rename to '%s'"), target); + if (source != NULL) { + /* + * This is recursive snapshots rename, put snapshot name + * (that might not exist) into zfs_name. + */ + assert(flags.recurse); + + (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); + (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); + zhp->zfs_type = ZFS_TYPE_SNAPSHOT; + } + /* * Make sure the target name is valid */ Modified: stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c ============================================================================== --- stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Fri Apr 19 10:16:00 2013 (r249644) +++ stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Fri Apr 19 10:35:45 2013 (r249645) @@ -2520,6 +2520,7 @@ struct renamesnaparg { char failed[MAXPATHLEN]; char *oldsnap; char *newsnap; + int error; }; static int @@ -2557,6 +2558,9 @@ dsl_snapshot_rename_one(const char *name dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check, dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0); + /* First successful rename clears the error. */ + ra->error = 0; + return (0); } @@ -2585,14 +2589,16 @@ dsl_recursive_rename(char *oldname, cons ra->oldsnap = strchr(oldname, '@') + 1; ra->newsnap = strchr(newname, '@') + 1; *ra->failed = '\0'; + ra->error = ENOENT; err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra, DS_FIND_CHILDREN); kmem_free(fsname, len); + if (err == 0) + err = ra->error; - if (err == 0) { + if (err == 0) err = dsl_sync_task_group_wait(ra->dstg); - } for (dst = list_head(&ra->dstg->dstg_tasks); dst; dst = list_next(&ra->dstg->dstg_tasks, dst)) { Modified: stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c ============================================================================== --- stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c Fri Apr 19 10:16:00 2013 (r249644) +++ stable/8/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c Fri Apr 19 10:35:45 2013 (r249645) @@ -780,7 +780,26 @@ zfs_secpolicy_rename_perms(const char *f static int zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) { - return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); + char *at = NULL; + int error; + + if ((zc->zc_cookie & 1) != 0) { + /* + * This is recursive rename, so the starting snapshot might + * not exist. Check file system or volume permission instead. + */ + at = strchr(zc->zc_name, '@'); + if (at == NULL) + return (EINVAL); + *at = '\0'; + } + + error = zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr); + + if (at != NULL) + *at = '@'; + + return (error); } static int