Date: Fri, 26 Jul 2019 01:49:58 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r350344 - in stable: 11/lib/libbe 11/sbin/bectl 11/sbin/bectl/tests 12/lib/libbe 12/sbin/bectl 12/sbin/bectl/tests Message-ID: <201907260149.x6Q1nwD0081435@repo.freebsd.org>
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Author: kevans Date: Fri Jul 26 01:49:58 2019 New Revision: 350344 URL: https://svnweb.freebsd.org/changeset/base/350344 Log: MFC r349380, r349383, r349455: bectl(8)/libbe(3) fixes r349380: libbe(3): mount: the BE dataset is mounted at / Other parts of libbe(3) were fairly strict on the mountpoint property of the BE dataset, and be_mount was not much better. It was improved in r347027 to allow mountpoint=none for depth==0, but this bit was still sensitive to mountpoint != / and mountpoint != none. Given that other parts of libbe(3) no longer restrict the mountpoint property here, and the rest of the base system is generally OK and will assume that a BE is mounted at /, let's do the same. r349383: libbe(3): restructure be_mount, skip canmount check for BE dataset Further cleanup after r349380; loader and kernel will both ignore canmount on the root dataset as well, so we should not be so strict about it when mounting it. be_mount is restructured to make it more clear that depth==0 is special, and to not try fetching these properties that we won't care about. r349455: bectl(8): create non-recursive boot environments bectl advertises that it has the ability to create recursive and non-recursive boot environments. This patch implements that functionality using the be_create_depth API provided by libbe. With this patch, bectl now works as bectl(8) describes in regards to creating recursive/non-recursive boot environments. Modified: stable/11/lib/libbe/be_access.c stable/11/sbin/bectl/bectl.c stable/11/sbin/bectl/tests/bectl_test.sh Directory Properties: stable/11/ (props changed) Changes in other areas also in this revision: Modified: stable/12/lib/libbe/be_access.c stable/12/sbin/bectl/bectl.c stable/12/sbin/bectl/tests/bectl_test.sh Directory Properties: stable/12/ (props changed) Modified: stable/11/lib/libbe/be_access.c ============================================================================== --- stable/11/lib/libbe/be_access.c Fri Jul 26 01:49:28 2019 (r350343) +++ stable/11/lib/libbe/be_access.c Fri Jul 26 01:49:58 2019 (r350344) @@ -89,25 +89,31 @@ be_mount_iter(zfs_handle_t *zfs_hdl, void *data) return (0); } - if (zfs_prop_get_int(zfs_hdl, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) - return (0); + /* + * canmount and mountpoint are both ignored for the BE dataset, because + * the rest of the system (kernel and loader) will effectively do the + * same. + */ + if (info->depth == 0) { + snprintf(tmp, BE_MAXPATHLEN, "%s", info->mountpoint); + } else { + if (zfs_prop_get_int(zfs_hdl, ZFS_PROP_CANMOUNT) == + ZFS_CANMOUNT_OFF) + return (0); - if (zfs_prop_get(zfs_hdl, ZFS_PROP_MOUNTPOINT, zfs_mnt, BE_MAXPATHLEN, - NULL, NULL, 0, 1)) - return (1); + if (zfs_prop_get(zfs_hdl, ZFS_PROP_MOUNTPOINT, zfs_mnt, + BE_MAXPATHLEN, NULL, NULL, 0, 1)) + return (1); - if (strcmp("none", zfs_mnt) == 0) { /* - * mountpoint=none; we'll mount it at info->mountpoint assuming - * we're at the root. If we're not at the root, we're likely - * at some intermediate dataset (e.g. zroot/var) that will have - * children that may need to be mounted. + * We've encountered mountpoint=none at some intermediate + * dataset (e.g. zroot/var) that will have children that may + * need to be mounted. Skip mounting it, but iterate through + * the children. */ - if (info->depth > 0) + if (strcmp("none", zfs_mnt) == 0) goto skipmount; - snprintf(tmp, BE_MAXPATHLEN, "%s", info->mountpoint); - } else { mountpoint = be_mountpoint_augmented(info->lbh, zfs_mnt); snprintf(tmp, BE_MAXPATHLEN, "%s%s", info->mountpoint, mountpoint); Modified: stable/11/sbin/bectl/bectl.c ============================================================================== --- stable/11/sbin/bectl/bectl.c Fri Jul 26 01:49:28 2019 (r350343) +++ stable/11/sbin/bectl/bectl.c Fri Jul 26 01:49:58 2019 (r350344) @@ -184,7 +184,8 @@ bectl_cmd_activate(int argc, char *argv[]) static int bectl_cmd_create(int argc, char *argv[]) { - char *atpos, *bootenv, *snapname, *source; + char snapshot[BE_MAXPATHLEN]; + char *atpos, *bootenv, *snapname; int err, opt; bool recursive; @@ -214,6 +215,8 @@ bectl_cmd_create(int argc, char *argv[]) } bootenv = *argv; + + err = BE_ERR_SUCCESS; if ((atpos = strchr(bootenv, '@')) != NULL) { /* * This is the "create a snapshot variant". No new boot @@ -221,24 +224,22 @@ bectl_cmd_create(int argc, char *argv[]) */ *atpos++ = '\0'; err = be_snapshot(be, bootenv, atpos, recursive, NULL); - } else if (snapname != NULL) { - if (strchr(snapname, '@') != NULL) - err = be_create_from_existing_snap(be, bootenv, - snapname); - else - err = be_create_from_existing(be, bootenv, snapname); } else { - if ((snapname = strchr(bootenv, '@')) != NULL) { - *(snapname++) = '\0'; - if ((err = be_snapshot(be, be_active_path(be), - snapname, true, NULL)) != BE_ERR_SUCCESS) - fprintf(stderr, "failed to create snapshot\n"); - asprintf(&source, "%s@%s", be_active_path(be), snapname); - err = be_create_from_existing_snap(be, bootenv, - source); - return (err); - } else - err = be_create(be, bootenv); + if (snapname == NULL) + /* Create from currently booted BE */ + err = be_snapshot(be, be_active_path(be), NULL, + recursive, snapshot); + else if (strchr(snapname, '@') != NULL) + /* Create from given snapshot */ + strlcpy(snapshot, snapname, sizeof(snapshot)); + else + /* Create from given BE */ + err = be_snapshot(be, snapname, NULL, recursive, + snapshot); + + if (err == BE_ERR_SUCCESS) + err = be_create_depth(be, bootenv, snapshot, + recursive == true ? -1 : 0); } switch (err) { Modified: stable/11/sbin/bectl/tests/bectl_test.sh ============================================================================== --- stable/11/sbin/bectl/tests/bectl_test.sh Fri Jul 26 01:49:28 2019 (r350343) +++ stable/11/sbin/bectl/tests/bectl_test.sh Fri Jul 26 01:49:58 2019 (r350344) @@ -99,11 +99,35 @@ bectl_create_body() mount=${cwd}/mnt bectl_create_setup ${zpool} ${disk} ${mount} + + # Create a child dataset that will be used to test creation + # of recursive and non-recursive boot environments. + atf_check zfs create -o mountpoint=/usr -o canmount=noauto \ + ${zpool}/ROOT/default/usr + # Test standard creation, creation of a snapshot, and creation from a # snapshot. atf_check bectl -r ${zpool}/ROOT create -e default default2 atf_check bectl -r ${zpool}/ROOT create default2@test_snap atf_check bectl -r ${zpool}/ROOT create -e default2@test_snap default3 + + # Test standard creation, creation of a snapshot, and creation from a + # snapshot for recursive boot environments. + atf_check bectl -r ${zpool}/ROOT create -r -e default recursive + atf_check bectl -r ${zpool}/ROOT create -r recursive@test_snap + atf_check bectl -r ${zpool}/ROOT create -r -e recursive@test_snap recursive-snap + + # Test that non-recursive boot environments have no child datasets. + atf_check -e not-empty -s not-exit:0 \ + zfs list "${zpool}/ROOT/default2/usr" + atf_check -e not-empty -s not-exit:0 \ + zfs list "${zpool}/ROOT/default3/usr" + + # Test that recursive boot environments have child datasets. + atf_check -o not-empty \ + zfs list "${zpool}/ROOT/recursive/usr" + atf_check -o not-empty \ + zfs list "${zpool}/ROOT/recursive-snap/usr" } bectl_create_cleanup() {
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