diff options
Diffstat (limited to 'cddl/contrib/opensolaris/cmd/zfs/zfs_main.c')
| -rw-r--r-- | cddl/contrib/opensolaris/cmd/zfs/zfs_main.c | 3233 |
1 files changed, 3233 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c b/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c new file mode 100644 index 0000000..3327b2a --- /dev/null +++ b/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c @@ -0,0 +1,3233 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <assert.h> +#include <ctype.h> +#include <errno.h> +#include <libgen.h> +#include <libintl.h> +#include <libuutil.h> +#include <locale.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <strings.h> +#include <unistd.h> +#include <fcntl.h> +#include <zone.h> +#include <sys/mntent.h> +#include <sys/mnttab.h> +#include <sys/mount.h> +#include <sys/stat.h> + +#include <libzfs.h> + +#include "zfs_iter.h" +#include "zfs_util.h" + +libzfs_handle_t *g_zfs; + +static FILE *mnttab_file; + +static int zfs_do_clone(int argc, char **argv); +static int zfs_do_create(int argc, char **argv); +static int zfs_do_destroy(int argc, char **argv); +static int zfs_do_get(int argc, char **argv); +static int zfs_do_inherit(int argc, char **argv); +static int zfs_do_list(int argc, char **argv); +static int zfs_do_mount(int argc, char **argv); +static int zfs_do_rename(int argc, char **argv); +static int zfs_do_rollback(int argc, char **argv); +static int zfs_do_set(int argc, char **argv); +static int zfs_do_snapshot(int argc, char **argv); +static int zfs_do_unmount(int argc, char **argv); +static int zfs_do_share(int argc, char **argv); +static int zfs_do_unshare(int argc, char **argv); +static int zfs_do_send(int argc, char **argv); +static int zfs_do_receive(int argc, char **argv); +static int zfs_do_promote(int argc, char **argv); +static int zfs_do_jail(int argc, char **argv); +static int zfs_do_unjail(int argc, char **argv); + +/* + * These libumem hooks provide a reasonable set of defaults for the allocator's + * debugging facilities. + */ +const char * +_umem_debug_init(void) +{ + return ("default,verbose"); /* $UMEM_DEBUG setting */ +} + +const char * +_umem_logging_init(void) +{ + return ("fail,contents"); /* $UMEM_LOGGING setting */ +} + +typedef enum { + HELP_CLONE, + HELP_CREATE, + HELP_DESTROY, + HELP_GET, + HELP_INHERIT, + HELP_JAIL, + HELP_UNJAIL, + HELP_LIST, + HELP_MOUNT, + HELP_PROMOTE, + HELP_RECEIVE, + HELP_RENAME, + HELP_ROLLBACK, + HELP_SEND, + HELP_SET, + HELP_SHARE, + HELP_SNAPSHOT, + HELP_UNMOUNT, + HELP_UNSHARE +} zfs_help_t; + +typedef struct zfs_command { + const char *name; + int (*func)(int argc, char **argv); + zfs_help_t usage; +} zfs_command_t; + +/* + * Master command table. Each ZFS command has a name, associated function, and + * usage message. The usage messages need to be internationalized, so we have + * to have a function to return the usage message based on a command index. + * + * These commands are organized according to how they are displayed in the usage + * message. An empty command (one with a NULL name) indicates an empty line in + * the generic usage message. + */ +static zfs_command_t command_table[] = { + { "create", zfs_do_create, HELP_CREATE }, + { "destroy", zfs_do_destroy, HELP_DESTROY }, + { NULL }, + { "snapshot", zfs_do_snapshot, HELP_SNAPSHOT }, + { "rollback", zfs_do_rollback, HELP_ROLLBACK }, + { "clone", zfs_do_clone, HELP_CLONE }, + { "promote", zfs_do_promote, HELP_PROMOTE }, + { "rename", zfs_do_rename, HELP_RENAME }, + { NULL }, + { "list", zfs_do_list, HELP_LIST }, + { NULL }, + { "set", zfs_do_set, HELP_SET }, + { "get", zfs_do_get, HELP_GET }, + { "inherit", zfs_do_inherit, HELP_INHERIT }, + { NULL }, + { "mount", zfs_do_mount, HELP_MOUNT }, + { NULL }, + { "unmount", zfs_do_unmount, HELP_UNMOUNT }, + { NULL }, + { "share", zfs_do_share, HELP_SHARE }, + { NULL }, + { "unshare", zfs_do_unshare, HELP_UNSHARE }, + { NULL }, + { "send", zfs_do_send, HELP_SEND }, + { "receive", zfs_do_receive, HELP_RECEIVE }, + { NULL }, + { "jail", zfs_do_jail, HELP_JAIL }, + { "unjail", zfs_do_unjail, HELP_UNJAIL }, +}; + +#define NCOMMAND (sizeof (command_table) / sizeof (command_table[0])) + +zfs_command_t *current_command; + +static const char * +get_usage(zfs_help_t idx) +{ + switch (idx) { + case HELP_CLONE: + return (gettext("\tclone <snapshot> <filesystem|volume>\n")); + case HELP_CREATE: + return (gettext("\tcreate [[-o property=value] ... ] " + "<filesystem>\n" + "\tcreate [-s] [-b blocksize] [[-o property=value] ...]\n" + "\t -V <size> <volume>\n")); + case HELP_DESTROY: + return (gettext("\tdestroy [-rRf] " + "<filesystem|volume|snapshot>\n")); + case HELP_GET: + return (gettext("\tget [-rHp] [-o field[,field]...] " + "[-s source[,source]...]\n" + "\t <all | property[,property]...> " + "[filesystem|volume|snapshot] ...\n")); + case HELP_INHERIT: + return (gettext("\tinherit [-r] <property> " + "<filesystem|volume> ...\n")); + case HELP_JAIL: + return (gettext("\tjail <jailid> <filesystem>\n")); + case HELP_UNJAIL: + return (gettext("\tunjail <jailid> <filesystem>\n")); + case HELP_LIST: + return (gettext("\tlist [-rH] [-o property[,property]...] " + "[-t type[,type]...]\n" + "\t [-s property [-s property]...]" + " [-S property [-S property]...]\n" + "\t [filesystem|volume|snapshot] ...\n")); + case HELP_MOUNT: + return (gettext("\tmount\n" + "\tmount [-o opts] [-O] -a\n" + "\tmount [-o opts] [-O] <filesystem>\n")); + case HELP_PROMOTE: + return (gettext("\tpromote <clone filesystem>\n")); + case HELP_RECEIVE: + return (gettext("\treceive [-vnF] <filesystem|volume|" + "snapshot>\n" + "\treceive [-vnF] -d <filesystem>\n")); + case HELP_RENAME: + return (gettext("\trename <filesystem|volume|snapshot> " + "<filesystem|volume|snapshot>\n")); + case HELP_ROLLBACK: + return (gettext("\trollback [-rRf] <snapshot>\n")); + case HELP_SEND: + return (gettext("\tsend [-i <snapshot>] <snapshot>\n")); + case HELP_SET: + return (gettext("\tset <property=value> " + "<filesystem|volume> ...\n")); + case HELP_SHARE: + return (gettext("\tshare -a\n" + "\tshare <filesystem>\n")); + case HELP_SNAPSHOT: + return (gettext("\tsnapshot [-r] " + "<filesystem@name|volume@name>\n")); + case HELP_UNMOUNT: + return (gettext("\tunmount [-f] -a\n" + "\tunmount [-f] <filesystem|mountpoint>\n")); + case HELP_UNSHARE: + return (gettext("\tunshare [-f] -a\n" + "\tunshare [-f] <filesystem|mountpoint>\n")); + } + + abort(); + /* NOTREACHED */ +} + +/* + * Utility function to guarantee malloc() success. + */ +void * +safe_malloc(size_t size) +{ + void *data; + + if ((data = calloc(1, size)) == NULL) { + (void) fprintf(stderr, "internal error: out of memory\n"); + exit(1); + } + + return (data); +} + +/* + * Callback routinue that will print out information for each of the + * the properties. + */ +static zfs_prop_t +usage_prop_cb(zfs_prop_t prop, void *cb) +{ + FILE *fp = cb; + + (void) fprintf(fp, "\t%-13s ", zfs_prop_to_name(prop)); + + if (zfs_prop_readonly(prop)) + (void) fprintf(fp, " NO "); + else + (void) fprintf(fp, " YES "); + + if (zfs_prop_inheritable(prop)) + (void) fprintf(fp, " YES "); + else + (void) fprintf(fp, " NO "); + + if (zfs_prop_values(prop) == NULL) + (void) fprintf(fp, "-\n"); + else + (void) fprintf(fp, "%s\n", zfs_prop_values(prop)); + + return (ZFS_PROP_CONT); +} + +/* + * Display usage message. If we're inside a command, display only the usage for + * that command. Otherwise, iterate over the entire command table and display + * a complete usage message. + */ +static void +usage(boolean_t requested) +{ + int i; + boolean_t show_properties = B_FALSE; + FILE *fp = requested ? stdout : stderr; + + if (current_command == NULL) { + + (void) fprintf(fp, gettext("usage: zfs command args ...\n")); + (void) fprintf(fp, + gettext("where 'command' is one of the following:\n\n")); + + for (i = 0; i < NCOMMAND; i++) { + if (command_table[i].name == NULL) + (void) fprintf(fp, "\n"); + else + (void) fprintf(fp, "%s", + get_usage(command_table[i].usage)); + } + + (void) fprintf(fp, gettext("\nEach dataset is of the form: " + "pool/[dataset/]*dataset[@name]\n")); + } else { + (void) fprintf(fp, gettext("usage:\n")); + (void) fprintf(fp, "%s", get_usage(current_command->usage)); + } + + if (current_command != NULL && + (strcmp(current_command->name, "set") == 0 || + strcmp(current_command->name, "get") == 0 || + strcmp(current_command->name, "inherit") == 0 || + strcmp(current_command->name, "list") == 0)) + show_properties = B_TRUE; + + if (show_properties) { + + (void) fprintf(fp, + gettext("\nThe following properties are supported:\n")); + + (void) fprintf(fp, "\n\t%-13s %s %s %s\n\n", + "PROPERTY", "EDIT", "INHERIT", "VALUES"); + + /* Iterate over all properties */ + (void) zfs_prop_iter(usage_prop_cb, fp, B_FALSE); + + (void) fprintf(fp, gettext("\nSizes are specified in bytes " + "with standard units such as K, M, G, etc.\n")); + (void) fprintf(fp, gettext("\n\nUser-defined properties can " + "be specified by using a name containing a colon (:).\n")); + } else { + /* + * TRANSLATION NOTE: + * "zfs set|get" must not be localised this is the + * command name and arguments. + */ + (void) fprintf(fp, + gettext("\nFor the property list, run: zfs set|get\n")); + } + + /* + * See comments at end of main(). + */ + if (getenv("ZFS_ABORT") != NULL) { + (void) printf("dumping core by request\n"); + abort(); + } + + exit(requested ? 0 : 2); +} + +/* + * zfs clone <fs, snap, vol> fs + * + * Given an existing dataset, create a writable copy whose initial contents + * are the same as the source. The newly created dataset maintains a + * dependency on the original; the original cannot be destroyed so long as + * the clone exists. + */ +static int +zfs_do_clone(int argc, char **argv) +{ + zfs_handle_t *zhp; + int ret; + + /* check options */ + if (argc > 1 && argv[1][0] == '-') { + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + argv[1][1]); + usage(B_FALSE); + } + + /* check number of arguments */ + if (argc < 2) { + (void) fprintf(stderr, gettext("missing source dataset " + "argument\n")); + usage(B_FALSE); + } + if (argc < 3) { + (void) fprintf(stderr, gettext("missing target dataset " + "argument\n")); + usage(B_FALSE); + } + if (argc > 3) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + /* open the source dataset */ + if ((zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_SNAPSHOT)) == NULL) + return (1); + + /* pass to libzfs */ + ret = zfs_clone(zhp, argv[2], NULL); + + /* create the mountpoint if necessary */ + if (ret == 0) { + zfs_handle_t *clone = zfs_open(g_zfs, argv[2], ZFS_TYPE_ANY); + if (clone != NULL) { + if ((ret = zfs_mount(clone, NULL, 0)) == 0) + ret = zfs_share(clone); + zfs_close(clone); + } + zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); + } + + zfs_close(zhp); + + return (ret == 0 ? 0 : 1); +} + +/* + * zfs create [-o prop=value] ... fs + * zfs create [-s] [-b blocksize] [-o prop=value] ... -V vol size + * + * Create a new dataset. This command can be used to create filesystems + * and volumes. Snapshot creation is handled by 'zfs snapshot'. + * For volumes, the user must specify a size to be used. + * + * The '-s' flag applies only to volumes, and indicates that we should not try + * to set the reservation for this volume. By default we set a reservation + * equal to the size for any volume. + */ +static int +zfs_do_create(int argc, char **argv) +{ + zfs_type_t type = ZFS_TYPE_FILESYSTEM; + zfs_handle_t *zhp = NULL; + uint64_t volsize; + int c; + boolean_t noreserve = B_FALSE; + int ret = 1; + nvlist_t *props = NULL; + uint64_t intval; + char *propname; + char *propval = NULL; + char *strval; + + if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) { + (void) fprintf(stderr, gettext("internal error: " + "out of memory\n")); + return (1); + } + + /* check options */ + while ((c = getopt(argc, argv, ":V:b:so:")) != -1) { + switch (c) { + case 'V': + type = ZFS_TYPE_VOLUME; + if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) { + (void) fprintf(stderr, gettext("bad volume " + "size '%s': %s\n"), optarg, + libzfs_error_description(g_zfs)); + goto error; + } + + if (nvlist_add_uint64(props, + zfs_prop_to_name(ZFS_PROP_VOLSIZE), + intval) != 0) { + (void) fprintf(stderr, gettext("internal " + "error: out of memory\n")); + goto error; + } + volsize = intval; + break; + case 'b': + if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) { + (void) fprintf(stderr, gettext("bad volume " + "block size '%s': %s\n"), optarg, + libzfs_error_description(g_zfs)); + goto error; + } + + if (nvlist_add_uint64(props, + zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), + intval) != 0) { + (void) fprintf(stderr, gettext("internal " + "error: out of memory\n")); + goto error; + } + break; + case 'o': + propname = optarg; + if ((propval = strchr(propname, '=')) == NULL) { + (void) fprintf(stderr, gettext("missing " + "'=' for -o option\n")); + goto error; + } + *propval = '\0'; + propval++; + if (nvlist_lookup_string(props, propname, + &strval) == 0) { + (void) fprintf(stderr, gettext("property '%s' " + "specified multiple times\n"), propname); + goto error; + } + if (nvlist_add_string(props, propname, propval) != 0) { + (void) fprintf(stderr, gettext("internal " + "error: out of memory\n")); + goto error; + } + break; + case 's': + noreserve = B_TRUE; + break; + case ':': + (void) fprintf(stderr, gettext("missing size " + "argument\n")); + goto badusage; + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + goto badusage; + } + } + + if (noreserve && type != ZFS_TYPE_VOLUME) { + (void) fprintf(stderr, gettext("'-s' can only be used when " + "creating a volume\n")); + goto badusage; + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc == 0) { + (void) fprintf(stderr, gettext("missing %s argument\n"), + zfs_type_to_name(type)); + goto badusage; + } + if (argc > 1) { + (void) fprintf(stderr, gettext("too many arguments\n")); + goto badusage; + } + + if (type == ZFS_TYPE_VOLUME && !noreserve && + nvlist_lookup_string(props, zfs_prop_to_name(ZFS_PROP_RESERVATION), + &strval) != 0) { + if (nvlist_add_uint64(props, + zfs_prop_to_name(ZFS_PROP_RESERVATION), + volsize) != 0) { + (void) fprintf(stderr, gettext("internal " + "error: out of memory\n")); + nvlist_free(props); + return (1); + } + } + + /* pass to libzfs */ + if (zfs_create(g_zfs, argv[0], type, props) != 0) + goto error; + + if (propval != NULL) + *(propval - 1) = '='; + zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], + B_FALSE, B_FALSE); + + if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) + goto error; + + /* + * Mount and/or share the new filesystem as appropriate. We provide a + * verbose error message to let the user know that their filesystem was + * in fact created, even if we failed to mount or share it. + */ + if (zfs_mount(zhp, NULL, 0) != 0) { + (void) fprintf(stderr, gettext("filesystem successfully " + "created, but not mounted\n")); + ret = 1; + } else if (zfs_share(zhp) != 0) { + (void) fprintf(stderr, gettext("filesystem successfully " + "created, but not shared\n")); + ret = 1; + } else { + ret = 0; + } + +error: + if (zhp) + zfs_close(zhp); + nvlist_free(props); + return (ret); +badusage: + nvlist_free(props); + usage(B_FALSE); + return (2); +} + +/* + * zfs destroy [-rf] <fs, snap, vol> + * + * -r Recursively destroy all children + * -R Recursively destroy all dependents, including clones + * -f Force unmounting of any dependents + * + * Destroys the given dataset. By default, it will unmount any filesystems, + * and refuse to destroy a dataset that has any dependents. A dependent can + * either be a child, or a clone of a child. + */ +typedef struct destroy_cbdata { + boolean_t cb_first; + int cb_force; + int cb_recurse; + int cb_error; + int cb_needforce; + int cb_doclones; + boolean_t cb_closezhp; + zfs_handle_t *cb_target; + char *cb_snapname; +} destroy_cbdata_t; + +/* + * Check for any dependents based on the '-r' or '-R' flags. + */ +static int +destroy_check_dependent(zfs_handle_t *zhp, void *data) +{ + destroy_cbdata_t *cbp = data; + const char *tname = zfs_get_name(cbp->cb_target); + const char *name = zfs_get_name(zhp); + + if (strncmp(tname, name, strlen(tname)) == 0 && + (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) { + /* + * This is a direct descendant, not a clone somewhere else in + * the hierarchy. + */ + if (cbp->cb_recurse) + goto out; + + if (cbp->cb_first) { + (void) fprintf(stderr, gettext("cannot destroy '%s': " + "%s has children\n"), + zfs_get_name(cbp->cb_target), + zfs_type_to_name(zfs_get_type(cbp->cb_target))); + (void) fprintf(stderr, gettext("use '-r' to destroy " + "the following datasets:\n")); + cbp->cb_first = B_FALSE; + cbp->cb_error = 1; + } + + (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); + } else { + /* + * This is a clone. We only want to report this if the '-r' + * wasn't specified, or the target is a snapshot. + */ + if (!cbp->cb_recurse && + zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT) + goto out; + + if (cbp->cb_first) { + (void) fprintf(stderr, gettext("cannot destroy '%s': " + "%s has dependent clones\n"), + zfs_get_name(cbp->cb_target), + zfs_type_to_name(zfs_get_type(cbp->cb_target))); + (void) fprintf(stderr, gettext("use '-R' to destroy " + "the following datasets:\n")); + cbp->cb_first = B_FALSE; + cbp->cb_error = 1; + } + + (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); + } + +out: + zfs_close(zhp); + return (0); +} + +static int +destroy_callback(zfs_handle_t *zhp, void *data) +{ + destroy_cbdata_t *cbp = data; + + /* + * Ignore pools (which we've already flagged as an error before getting + * here. + */ + if (strchr(zfs_get_name(zhp), '/') == NULL && + zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { + zfs_close(zhp); + return (0); + } + + /* + * Bail out on the first error. + */ + if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 || + zfs_destroy(zhp) != 0) { + zfs_close(zhp); + return (-1); + } + + zfs_close(zhp); + return (0); +} + +static int +destroy_snap_clones(zfs_handle_t *zhp, void *arg) +{ + destroy_cbdata_t *cbp = arg; + char thissnap[MAXPATHLEN]; + zfs_handle_t *szhp; + boolean_t closezhp = cbp->cb_closezhp; + int rv; + + (void) snprintf(thissnap, sizeof (thissnap), + "%s@%s", zfs_get_name(zhp), cbp->cb_snapname); + + libzfs_print_on_error(g_zfs, B_FALSE); + szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT); + libzfs_print_on_error(g_zfs, B_TRUE); + if (szhp) { + /* + * Destroy any clones of this snapshot + */ + if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback, + cbp) != 0) { + zfs_close(szhp); + if (closezhp) + zfs_close(zhp); + return (-1); + } + zfs_close(szhp); + } + + cbp->cb_closezhp = B_TRUE; + rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg); + if (closezhp) + zfs_close(zhp); + return (rv); +} + +static int +zfs_do_destroy(int argc, char **argv) +{ + destroy_cbdata_t cb = { 0 }; + int c; + zfs_handle_t *zhp; + char *cp; + + /* check options */ + while ((c = getopt(argc, argv, "frR")) != -1) { + switch (c) { + case 'f': + cb.cb_force = 1; + break; + case 'r': + cb.cb_recurse = 1; + break; + case 'R': + cb.cb_recurse = 1; + cb.cb_doclones = 1; + break; + case '?': + default: + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc == 0) { + (void) fprintf(stderr, gettext("missing path argument\n")); + usage(B_FALSE); + } + if (argc > 1) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + /* + * If we are doing recursive destroy of a snapshot, then the + * named snapshot may not exist. Go straight to libzfs. + */ + if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) { + int ret; + + *cp = '\0'; + if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) + return (1); + *cp = '@'; + cp++; + + if (cb.cb_doclones) { + cb.cb_snapname = cp; + if (destroy_snap_clones(zhp, &cb) != 0) { + zfs_close(zhp); + return (1); + } + } + + ret = zfs_destroy_snaps(zhp, cp); + zfs_close(zhp); + if (ret) { + (void) fprintf(stderr, + gettext("no snapshots destroyed\n")); + } else { + zpool_log_history(g_zfs, argc + optind, argv - optind, + argv[0], B_FALSE, B_FALSE); + } + return (ret != 0); + } + + + /* Open the given dataset */ + if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) + return (1); + + cb.cb_target = zhp; + + /* + * Perform an explicit check for pools before going any further. + */ + if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL && + zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { + (void) fprintf(stderr, gettext("cannot destroy '%s': " + "operation does not apply to pools\n"), + zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use 'zfs destroy -r " + "%s' to destroy all datasets in the pool\n"), + zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use 'zpool destroy %s' " + "to destroy the pool itself\n"), zfs_get_name(zhp)); + zfs_close(zhp); + return (1); + } + + /* + * Check for any dependents and/or clones. + */ + cb.cb_first = B_TRUE; + if (!cb.cb_doclones && + zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent, + &cb) != 0) { + zfs_close(zhp); + return (1); + } + + + if (cb.cb_error || + zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0) { + zfs_close(zhp); + return (1); + } + + /* + * Do the real thing. The callback will close the handle regardless of + * whether it succeeds or not. + */ + if (destroy_callback(zhp, &cb) != 0) + return (1); + + zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], + B_FALSE, B_FALSE); + + return (0); +} + +/* + * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...] + * < all | property[,property]... > < fs | snap | vol > ... + * + * -r recurse over any child datasets + * -H scripted mode. Headers are stripped, and fields are separated + * by tabs instead of spaces. + * -o Set of fields to display. One of "name,property,value,source". + * Default is all four. + * -s Set of sources to allow. One of + * "local,default,inherited,temporary,none". Default is all + * five. + * -p Display values in parsable (literal) format. + * + * Prints properties for the given datasets. The user can control which + * columns to display as well as which property types to allow. + */ + +/* + * Invoked to display the properties for a single dataset. + */ +static int +get_callback(zfs_handle_t *zhp, void *data) +{ + char buf[ZFS_MAXPROPLEN]; + zfs_source_t sourcetype; + char source[ZFS_MAXNAMELEN]; + libzfs_get_cbdata_t *cbp = data; + nvlist_t *userprop = zfs_get_user_props(zhp); + zfs_proplist_t *pl = cbp->cb_proplist; + nvlist_t *propval; + char *strval; + char *sourceval; + + for (; pl != NULL; pl = pl->pl_next) { + /* + * Skip the special fake placeholder. This will also skip over + * the name property when 'all' is specified. + */ + if (pl->pl_prop == ZFS_PROP_NAME && + pl == cbp->cb_proplist) + continue; + + if (pl->pl_prop != ZFS_PROP_INVAL) { + if (zfs_prop_get(zhp, pl->pl_prop, buf, + sizeof (buf), &sourcetype, source, + sizeof (source), + cbp->cb_literal) != 0) { + if (pl->pl_all) + continue; + if (!zfs_prop_valid_for_type(pl->pl_prop, + ZFS_TYPE_ANY)) { + (void) fprintf(stderr, + gettext("No such property '%s'\n"), + zfs_prop_to_name(pl->pl_prop)); + continue; + } + sourcetype = ZFS_SRC_NONE; + (void) strlcpy(buf, "-", sizeof (buf)); + } + + libzfs_print_one_property(zfs_get_name(zhp), cbp, + zfs_prop_to_name(pl->pl_prop), + buf, sourcetype, source); + } else { + if (nvlist_lookup_nvlist(userprop, + pl->pl_user_prop, &propval) != 0) { + if (pl->pl_all) + continue; + sourcetype = ZFS_SRC_NONE; + strval = "-"; + } else { + verify(nvlist_lookup_string(propval, + ZFS_PROP_VALUE, &strval) == 0); + verify(nvlist_lookup_string(propval, + ZFS_PROP_SOURCE, &sourceval) == 0); + + if (strcmp(sourceval, + zfs_get_name(zhp)) == 0) { + sourcetype = ZFS_SRC_LOCAL; + } else { + sourcetype = ZFS_SRC_INHERITED; + (void) strlcpy(source, + sourceval, sizeof (source)); + } + } + + libzfs_print_one_property(zfs_get_name(zhp), cbp, + pl->pl_user_prop, strval, sourcetype, + source); + } + } + + return (0); +} + +static int +zfs_do_get(int argc, char **argv) +{ + libzfs_get_cbdata_t cb = { 0 }; + boolean_t recurse = B_FALSE; + int i, c; + char *value, *fields; + int ret; + zfs_proplist_t fake_name = { 0 }; + + /* + * Set up default columns and sources. + */ + cb.cb_sources = ZFS_SRC_ALL; + cb.cb_columns[0] = GET_COL_NAME; + cb.cb_columns[1] = GET_COL_PROPERTY; + cb.cb_columns[2] = GET_COL_VALUE; + cb.cb_columns[3] = GET_COL_SOURCE; + + /* check options */ + while ((c = getopt(argc, argv, ":o:s:rHp")) != -1) { + switch (c) { + case 'p': + cb.cb_literal = B_TRUE; + break; + case 'r': + recurse = B_TRUE; + break; + case 'H': + cb.cb_scripted = B_TRUE; + break; + case ':': + (void) fprintf(stderr, gettext("missing argument for " + "'%c' option\n"), optopt); + usage(B_FALSE); + break; + case 'o': + /* + * Process the set of columns to display. We zero out + * the structure to give us a blank slate. + */ + bzero(&cb.cb_columns, sizeof (cb.cb_columns)); + i = 0; + while (*optarg != '\0') { + static char *col_subopts[] = + { "name", "property", "value", "source", + NULL }; + + if (i == 4) { + (void) fprintf(stderr, gettext("too " + "many fields given to -o " + "option\n")); + usage(B_FALSE); + } + + switch (getsubopt(&optarg, col_subopts, + &value)) { + case 0: + cb.cb_columns[i++] = GET_COL_NAME; + break; + case 1: + cb.cb_columns[i++] = GET_COL_PROPERTY; + break; + case 2: + cb.cb_columns[i++] = GET_COL_VALUE; + break; + case 3: + cb.cb_columns[i++] = GET_COL_SOURCE; + break; + default: + (void) fprintf(stderr, + gettext("invalid column name " + "'%s'\n"), value); + usage(B_FALSE); + } + } + break; + + case 's': + cb.cb_sources = 0; + while (*optarg != '\0') { + static char *source_subopts[] = { + "local", "default", "inherited", + "temporary", "none", NULL }; + + switch (getsubopt(&optarg, source_subopts, + &value)) { + case 0: + cb.cb_sources |= ZFS_SRC_LOCAL; + break; + case 1: + cb.cb_sources |= ZFS_SRC_DEFAULT; + break; + case 2: + cb.cb_sources |= ZFS_SRC_INHERITED; + break; + case 3: + cb.cb_sources |= ZFS_SRC_TEMPORARY; + break; + case 4: + cb.cb_sources |= ZFS_SRC_NONE; + break; + default: + (void) fprintf(stderr, + gettext("invalid source " + "'%s'\n"), value); + usage(B_FALSE); + } + } + break; + + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + if (argc < 1) { + (void) fprintf(stderr, gettext("missing property " + "argument\n")); + usage(B_FALSE); + } + + fields = argv[0]; + + if (zfs_get_proplist(g_zfs, fields, &cb.cb_proplist) != 0) + usage(B_FALSE); + + argc--; + argv++; + + /* + * As part of zfs_expand_proplist(), we keep track of the maximum column + * width for each property. For the 'NAME' (and 'SOURCE') columns, we + * need to know the maximum name length. However, the user likely did + * not specify 'name' as one of the properties to fetch, so we need to + * make sure we always include at least this property for + * print_get_headers() to work properly. + */ + if (cb.cb_proplist != NULL) { + fake_name.pl_prop = ZFS_PROP_NAME; + fake_name.pl_width = strlen(gettext("NAME")); + fake_name.pl_next = cb.cb_proplist; + cb.cb_proplist = &fake_name; + } + + cb.cb_first = B_TRUE; + + /* run for each object */ + ret = zfs_for_each(argc, argv, recurse, ZFS_TYPE_ANY, NULL, + &cb.cb_proplist, get_callback, &cb, B_FALSE); + + if (cb.cb_proplist == &fake_name) + zfs_free_proplist(fake_name.pl_next); + else + zfs_free_proplist(cb.cb_proplist); + + return (ret); +} + +/* + * inherit [-r] <property> <fs|vol> ... + * + * -r Recurse over all children + * + * For each dataset specified on the command line, inherit the given property + * from its parent. Inheriting a property at the pool level will cause it to + * use the default value. The '-r' flag will recurse over all children, and is + * useful for setting a property on a hierarchy-wide basis, regardless of any + * local modifications for each dataset. + */ +typedef struct inherit_cbdata { + char *cb_propname; + boolean_t cb_any_successful; +} inherit_cbdata_t; + +static int +inherit_callback(zfs_handle_t *zhp, void *data) +{ + inherit_cbdata_t *cbp = data; + int ret; + + ret = zfs_prop_inherit(zhp, cbp->cb_propname); + if (ret == 0) + cbp->cb_any_successful = B_TRUE; + return (ret != 0); +} + +static int +zfs_do_inherit(int argc, char **argv) +{ + boolean_t recurse = B_FALSE; + int c; + zfs_prop_t prop; + inherit_cbdata_t cb; + int ret; + + /* check options */ + while ((c = getopt(argc, argv, "r")) != -1) { + switch (c) { + case 'r': + recurse = B_TRUE; + break; + case '?': + default: + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc < 1) { + (void) fprintf(stderr, gettext("missing property argument\n")); + usage(B_FALSE); + } + if (argc < 2) { + (void) fprintf(stderr, gettext("missing dataset argument\n")); + usage(B_FALSE); + } + + cb.cb_propname = argv[0]; + argc--; + argv++; + + if ((prop = zfs_name_to_prop(cb.cb_propname)) != ZFS_PROP_INVAL) { + if (zfs_prop_readonly(prop)) { + (void) fprintf(stderr, gettext( + "%s property is read-only\n"), + cb.cb_propname); + return (1); + } + if (!zfs_prop_inheritable(prop)) { + (void) fprintf(stderr, gettext("'%s' property cannot " + "be inherited\n"), cb.cb_propname); + if (prop == ZFS_PROP_QUOTA || + prop == ZFS_PROP_RESERVATION) + (void) fprintf(stderr, gettext("use 'zfs set " + "%s=none' to clear\n"), cb.cb_propname); + return (1); + } + } else if (!zfs_prop_user(cb.cb_propname)) { + (void) fprintf(stderr, gettext( + "invalid property '%s'\n"), + cb.cb_propname); + usage(B_FALSE); + } + + cb.cb_any_successful = B_FALSE; + + ret = zfs_for_each(argc, argv, recurse, + ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, NULL, NULL, + inherit_callback, &cb, B_FALSE); + + if (cb.cb_any_successful) { + zpool_log_history(g_zfs, argc + optind + 1, argv - optind - 1, + argv[0], B_FALSE, B_FALSE); + } + + return (ret); +} + +/* + * list [-rH] [-o property[,property]...] [-t type[,type]...] + * [-s property [-s property]...] [-S property [-S property]...] + * <dataset> ... + * + * -r Recurse over all children + * -H Scripted mode; elide headers and separate colums by tabs + * -o Control which fields to display. + * -t Control which object types to display. + * -s Specify sort columns, descending order. + * -S Specify sort columns, ascending order. + * + * When given no arguments, lists all filesystems in the system. + * Otherwise, list the specified datasets, optionally recursing down them if + * '-r' is specified. + */ +typedef struct list_cbdata { + boolean_t cb_first; + boolean_t cb_scripted; + zfs_proplist_t *cb_proplist; +} list_cbdata_t; + +/* + * Given a list of columns to display, output appropriate headers for each one. + */ +static void +print_header(zfs_proplist_t *pl) +{ + char headerbuf[ZFS_MAXPROPLEN]; + const char *header; + int i; + boolean_t first = B_TRUE; + boolean_t right_justify; + + for (; pl != NULL; pl = pl->pl_next) { + if (!first) { + (void) printf(" "); + } else { + first = B_FALSE; + } + + right_justify = B_FALSE; + if (pl->pl_prop != ZFS_PROP_INVAL) { + header = zfs_prop_column_name(pl->pl_prop); + right_justify = zfs_prop_align_right(pl->pl_prop); + } else { + for (i = 0; pl->pl_user_prop[i] != '\0'; i++) + headerbuf[i] = toupper(pl->pl_user_prop[i]); + headerbuf[i] = '\0'; + header = headerbuf; + } + + if (pl->pl_next == NULL && !right_justify) + (void) printf("%s", header); + else if (right_justify) + (void) printf("%*s", pl->pl_width, header); + else + (void) printf("%-*s", pl->pl_width, header); + } + + (void) printf("\n"); +} + +/* + * Given a dataset and a list of fields, print out all the properties according + * to the described layout. + */ +static void +print_dataset(zfs_handle_t *zhp, zfs_proplist_t *pl, int scripted) +{ + boolean_t first = B_TRUE; + char property[ZFS_MAXPROPLEN]; + nvlist_t *userprops = zfs_get_user_props(zhp); + nvlist_t *propval; + char *propstr; + boolean_t right_justify; + int width; + + for (; pl != NULL; pl = pl->pl_next) { + if (!first) { + if (scripted) + (void) printf("\t"); + else + (void) printf(" "); + } else { + first = B_FALSE; + } + + right_justify = B_FALSE; + if (pl->pl_prop != ZFS_PROP_INVAL) { + if (zfs_prop_get(zhp, pl->pl_prop, property, + sizeof (property), NULL, NULL, 0, B_FALSE) != 0) + propstr = "-"; + else + propstr = property; + + right_justify = zfs_prop_align_right(pl->pl_prop); + } else { + if (nvlist_lookup_nvlist(userprops, + pl->pl_user_prop, &propval) != 0) + propstr = "-"; + else + verify(nvlist_lookup_string(propval, + ZFS_PROP_VALUE, &propstr) == 0); + } + + width = pl->pl_width; + + /* + * If this is being called in scripted mode, or if this is the + * last column and it is left-justified, don't include a width + * format specifier. + */ + if (scripted || (pl->pl_next == NULL && !right_justify)) + (void) printf("%s", propstr); + else if (right_justify) + (void) printf("%*s", width, propstr); + else + (void) printf("%-*s", width, propstr); + } + + (void) printf("\n"); +} + +/* + * Generic callback function to list a dataset or snapshot. + */ +static int +list_callback(zfs_handle_t *zhp, void *data) +{ + list_cbdata_t *cbp = data; + + if (cbp->cb_first) { + if (!cbp->cb_scripted) + print_header(cbp->cb_proplist); + cbp->cb_first = B_FALSE; + } + + print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted); + + return (0); +} + +static int +zfs_do_list(int argc, char **argv) +{ + int c; + boolean_t recurse = B_FALSE; + boolean_t scripted = B_FALSE; + static char default_fields[] = + "name,used,available,referenced,mountpoint"; + int types = ZFS_TYPE_ANY; + char *fields = NULL; + char *basic_fields = default_fields; + list_cbdata_t cb = { 0 }; + char *value; + int ret; + char *type_subopts[] = { "filesystem", "volume", "snapshot", NULL }; + zfs_sort_column_t *sortcol = NULL; + + /* check options */ + while ((c = getopt(argc, argv, ":o:rt:Hs:S:")) != -1) { + switch (c) { + case 'o': + fields = optarg; + break; + case 'r': + recurse = B_TRUE; + break; + case 'H': + scripted = B_TRUE; + break; + case 's': + if (zfs_add_sort_column(&sortcol, optarg, + B_FALSE) != 0) { + (void) fprintf(stderr, + gettext("invalid property '%s'\n"), optarg); + usage(B_FALSE); + } + break; + case 'S': + if (zfs_add_sort_column(&sortcol, optarg, + B_TRUE) != 0) { + (void) fprintf(stderr, + gettext("invalid property '%s'\n"), optarg); + usage(B_FALSE); + } + break; + case 't': + types = 0; + while (*optarg != '\0') { + switch (getsubopt(&optarg, type_subopts, + &value)) { + case 0: + types |= ZFS_TYPE_FILESYSTEM; + break; + case 1: + types |= ZFS_TYPE_VOLUME; + break; + case 2: + types |= ZFS_TYPE_SNAPSHOT; + break; + default: + (void) fprintf(stderr, + gettext("invalid type '%s'\n"), + value); + usage(B_FALSE); + } + } + break; + case ':': + (void) fprintf(stderr, gettext("missing argument for " + "'%c' option\n"), optopt); + usage(B_FALSE); + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + if (fields == NULL) + fields = basic_fields; + + /* + * If the user specifies '-o all', the zfs_get_proplist() doesn't + * normally include the name of the dataset. For 'zfs list', we always + * want this property to be first. + */ + if (zfs_get_proplist(g_zfs, fields, &cb.cb_proplist) != 0) + usage(B_FALSE); + + cb.cb_scripted = scripted; + cb.cb_first = B_TRUE; + + ret = zfs_for_each(argc, argv, recurse, types, sortcol, &cb.cb_proplist, + list_callback, &cb, B_TRUE); + + zfs_free_proplist(cb.cb_proplist); + zfs_free_sort_columns(sortcol); + + if (ret == 0 && cb.cb_first) + (void) printf(gettext("no datasets available\n")); + + return (ret); +} + +/* + * zfs rename <fs | snap | vol> <fs | snap | vol> + * + * Renames the given dataset to another of the same type. + */ +/* ARGSUSED */ +static int +zfs_do_rename(int argc, char **argv) +{ + zfs_handle_t *zhp; + int ret; + + /* check options */ + if (argc > 1 && argv[1][0] == '-') { + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + argv[1][1]); + usage(B_FALSE); + } + + /* check number of arguments */ + if (argc < 2) { + (void) fprintf(stderr, gettext("missing source dataset " + "argument\n")); + usage(B_FALSE); + } + if (argc < 3) { + (void) fprintf(stderr, gettext("missing target dataset " + "argument\n")); + usage(B_FALSE); + } + if (argc > 3) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + if ((zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_ANY)) == NULL) + return (1); + + ret = (zfs_rename(zhp, argv[2]) != 0); + + if (!ret) + zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); + + zfs_close(zhp); + return (ret); +} + +/* + * zfs promote <fs> + * + * Promotes the given clone fs to be the parent + */ +/* ARGSUSED */ +static int +zfs_do_promote(int argc, char **argv) +{ + zfs_handle_t *zhp; + int ret; + + /* check options */ + if (argc > 1 && argv[1][0] == '-') { + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + argv[1][1]); + usage(B_FALSE); + } + + /* check number of arguments */ + if (argc < 2) { + (void) fprintf(stderr, gettext("missing clone filesystem" + " argument\n")); + usage(B_FALSE); + } + if (argc > 2) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); + if (zhp == NULL) + return (1); + + ret = (zfs_promote(zhp) != 0); + + if (!ret) + zpool_log_history(g_zfs, argc, argv, argv[1], B_FALSE, B_FALSE); + + zfs_close(zhp); + return (ret); +} + +/* + * zfs rollback [-rfR] <snapshot> + * + * -r Delete any intervening snapshots before doing rollback + * -R Delete any snapshots and their clones + * -f Force unmount filesystems, even if they are in use. + * + * Given a filesystem, rollback to a specific snapshot, discarding any changes + * since then and making it the active dataset. If more recent snapshots exist, + * the command will complain unless the '-r' flag is given. + */ +typedef struct rollback_cbdata { + uint64_t cb_create; + boolean_t cb_first; + int cb_doclones; + char *cb_target; + int cb_error; + boolean_t cb_recurse; + boolean_t cb_dependent; +} rollback_cbdata_t; + +/* + * Report any snapshots more recent than the one specified. Used when '-r' is + * not specified. We reuse this same callback for the snapshot dependents - if + * 'cb_dependent' is set, then this is a dependent and we should report it + * without checking the transaction group. + */ +static int +rollback_check(zfs_handle_t *zhp, void *data) +{ + rollback_cbdata_t *cbp = data; + + if (cbp->cb_doclones) { + zfs_close(zhp); + return (0); + } + + if (!cbp->cb_dependent) { + if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 && + zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && + zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > + cbp->cb_create) { + + if (cbp->cb_first && !cbp->cb_recurse) { + (void) fprintf(stderr, gettext("cannot " + "rollback to '%s': more recent snapshots " + "exist\n"), + cbp->cb_target); + (void) fprintf(stderr, gettext("use '-r' to " + "force deletion of the following " + "snapshots:\n")); + cbp->cb_first = 0; + cbp->cb_error = 1; + } + + if (cbp->cb_recurse) { + cbp->cb_dependent = B_TRUE; + if (zfs_iter_dependents(zhp, B_TRUE, + rollback_check, cbp) != 0) { + zfs_close(zhp); + return (-1); + } + cbp->cb_dependent = B_FALSE; + } else { + (void) fprintf(stderr, "%s\n", + zfs_get_name(zhp)); + } + } + } else { + if (cbp->cb_first && cbp->cb_recurse) { + (void) fprintf(stderr, gettext("cannot rollback to " + "'%s': clones of previous snapshots exist\n"), + cbp->cb_target); + (void) fprintf(stderr, gettext("use '-R' to " + "force deletion of the following clones and " + "dependents:\n")); + cbp->cb_first = 0; + cbp->cb_error = 1; + } + + (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); + } + + zfs_close(zhp); + return (0); +} + +static int +zfs_do_rollback(int argc, char **argv) +{ + int ret; + int c; + rollback_cbdata_t cb = { 0 }; + zfs_handle_t *zhp, *snap; + char parentname[ZFS_MAXNAMELEN]; + char *delim; + int force = 0; + + /* check options */ + while ((c = getopt(argc, argv, "rfR")) != -1) { + switch (c) { + case 'f': + force = 1; + break; + case 'r': + cb.cb_recurse = 1; + break; + case 'R': + cb.cb_recurse = 1; + cb.cb_doclones = 1; + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc < 1) { + (void) fprintf(stderr, gettext("missing dataset argument\n")); + usage(B_FALSE); + } + if (argc > 1) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + /* open the snapshot */ + if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL) + return (1); + + /* open the parent dataset */ + (void) strlcpy(parentname, argv[0], sizeof (parentname)); + verify((delim = strrchr(parentname, '@')) != NULL); + *delim = '\0'; + if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_ANY)) == NULL) { + zfs_close(snap); + return (1); + } + + /* + * Check for more recent snapshots and/or clones based on the presence + * of '-r' and '-R'. + */ + cb.cb_target = argv[0]; + cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); + cb.cb_first = B_TRUE; + cb.cb_error = 0; + if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0) + goto out; + + if ((ret = cb.cb_error) != 0) + goto out; + + /* + * Rollback parent to the given snapshot. + */ + ret = zfs_rollback(zhp, snap, force); + + if (!ret) { + zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], + B_FALSE, B_FALSE); + } + +out: + zfs_close(snap); + zfs_close(zhp); + + if (ret == 0) + return (0); + else + return (1); +} + +/* + * zfs set property=value { fs | snap | vol } ... + * + * Sets the given property for all datasets specified on the command line. + */ +typedef struct set_cbdata { + char *cb_propname; + char *cb_value; + boolean_t cb_any_successful; +} set_cbdata_t; + +static int +set_callback(zfs_handle_t *zhp, void *data) +{ + set_cbdata_t *cbp = data; + + if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) { + switch (libzfs_errno(g_zfs)) { + case EZFS_MOUNTFAILED: + (void) fprintf(stderr, gettext("property may be set " + "but unable to remount filesystem\n")); + break; + case EZFS_SHARENFSFAILED: + (void) fprintf(stderr, gettext("property may be set " + "but unable to reshare filesystem\n")); + break; + } + return (1); + } + cbp->cb_any_successful = B_TRUE; + return (0); +} + +static int +zfs_do_set(int argc, char **argv) +{ + set_cbdata_t cb; + int ret; + + /* check for options */ + if (argc > 1 && argv[1][0] == '-') { + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + argv[1][1]); + usage(B_FALSE); + } + + /* check number of arguments */ + if (argc < 2) { + (void) fprintf(stderr, gettext("missing property=value " + "argument\n")); + usage(B_FALSE); + } + if (argc < 3) { + (void) fprintf(stderr, gettext("missing dataset name\n")); + usage(B_FALSE); + } + + /* validate property=value argument */ + cb.cb_propname = argv[1]; + if ((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) { + (void) fprintf(stderr, gettext("missing value in " + "property=value argument\n")); + usage(B_FALSE); + } + + *cb.cb_value = '\0'; + cb.cb_value++; + cb.cb_any_successful = B_FALSE; + + if (*cb.cb_propname == '\0') { + (void) fprintf(stderr, + gettext("missing property in property=value argument\n")); + usage(B_FALSE); + } + + ret = zfs_for_each(argc - 2, argv + 2, B_FALSE, + ZFS_TYPE_ANY, NULL, NULL, set_callback, &cb, B_FALSE); + + if (cb.cb_any_successful) { + *(cb.cb_value - 1) = '='; + zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); + } + + return (ret); +} + +/* + * zfs snapshot [-r] <fs@snap> + * + * Creates a snapshot with the given name. While functionally equivalent to + * 'zfs create', it is a separate command to diffferentiate intent. + */ +static int +zfs_do_snapshot(int argc, char **argv) +{ + int recursive = B_FALSE; + int ret; + char c; + + /* check options */ + while ((c = getopt(argc, argv, ":r")) != -1) { + switch (c) { + case 'r': + recursive = B_TRUE; + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc < 1) { + (void) fprintf(stderr, gettext("missing snapshot argument\n")); + usage(B_FALSE); + } + if (argc > 1) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + ret = zfs_snapshot(g_zfs, argv[0], recursive); + if (ret && recursive) + (void) fprintf(stderr, gettext("no snapshots were created\n")); + if (!ret) { + zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], + B_FALSE, B_FALSE); + } + return (ret != 0); +} + +/* + * zfs send [-i <@snap>] <fs@snap> + * + * Send a backup stream to stdout. + */ +static int +zfs_do_send(int argc, char **argv) +{ + char *fromname = NULL; + char *cp; + zfs_handle_t *zhp; + int c, err; + + /* check options */ + while ((c = getopt(argc, argv, ":i:")) != -1) { + switch (c) { + case 'i': + if (fromname) + usage(B_FALSE); + fromname = optarg; + break; + case ':': + (void) fprintf(stderr, gettext("missing argument for " + "'%c' option\n"), optopt); + usage(B_FALSE); + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc < 1) { + (void) fprintf(stderr, gettext("missing snapshot argument\n")); + usage(B_FALSE); + } + if (argc > 1) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + if (isatty(STDOUT_FILENO)) { + (void) fprintf(stderr, + gettext("Error: Stream can not be written to a terminal.\n" + "You must redirect standard output.\n")); + return (1); + } + + if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL) + return (1); + + /* + * If they specified the full path to the snapshot, chop off + * everything except the short name of the snapshot. + */ + if (fromname && (cp = strchr(fromname, '@')) != NULL) { + if (cp != fromname && + strncmp(argv[0], fromname, cp - fromname + 1)) { + (void) fprintf(stderr, + gettext("incremental source must be " + "in same filesystem\n")); + usage(B_FALSE); + } + fromname = cp + 1; + if (strchr(fromname, '@') || strchr(fromname, '/')) { + (void) fprintf(stderr, + gettext("invalid incremental source\n")); + usage(B_FALSE); + } + } + + err = zfs_send(zhp, fromname, STDOUT_FILENO); + zfs_close(zhp); + + return (err != 0); +} + +/* + * zfs receive <fs@snap> + * + * Restore a backup stream from stdin. + */ +static int +zfs_do_receive(int argc, char **argv) +{ + int c, err; + boolean_t isprefix = B_FALSE; + boolean_t dryrun = B_FALSE; + boolean_t verbose = B_FALSE; + boolean_t force = B_FALSE; + + /* check options */ + while ((c = getopt(argc, argv, ":dnvF")) != -1) { + switch (c) { + case 'd': + isprefix = B_TRUE; + break; + case 'n': + dryrun = B_TRUE; + break; + case 'v': + verbose = B_TRUE; + break; + case 'F': + force = B_TRUE; + break; + case ':': + (void) fprintf(stderr, gettext("missing argument for " + "'%c' option\n"), optopt); + usage(B_FALSE); + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (argc < 1) { + (void) fprintf(stderr, gettext("missing snapshot argument\n")); + usage(B_FALSE); + } + if (argc > 1) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + if (isatty(STDIN_FILENO)) { + (void) fprintf(stderr, + gettext("Error: Backup stream can not be read " + "from a terminal.\n" + "You must redirect standard input.\n")); + return (1); + } + + err = zfs_receive(g_zfs, argv[0], isprefix, verbose, dryrun, force, + STDIN_FILENO); + + if (!err) { + zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], + B_FALSE, B_FALSE); + } + + return (err != 0); +} + +typedef struct get_all_cbdata { + zfs_handle_t **cb_handles; + size_t cb_alloc; + size_t cb_used; + uint_t cb_types; +} get_all_cbdata_t; + +static int +get_one_dataset(zfs_handle_t *zhp, void *data) +{ + get_all_cbdata_t *cbp = data; + zfs_type_t type = zfs_get_type(zhp); + + /* + * Interate over any nested datasets. + */ + if (type == ZFS_TYPE_FILESYSTEM && + zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) { + zfs_close(zhp); + return (1); + } + + /* + * Skip any datasets whose type does not match. + */ + if ((type & cbp->cb_types) == 0) { + zfs_close(zhp); + return (0); + } + + if (cbp->cb_alloc == cbp->cb_used) { + zfs_handle_t **handles; + + if (cbp->cb_alloc == 0) + cbp->cb_alloc = 64; + else + cbp->cb_alloc *= 2; + + handles = safe_malloc(cbp->cb_alloc * sizeof (void *)); + + if (cbp->cb_handles) { + bcopy(cbp->cb_handles, handles, + cbp->cb_used * sizeof (void *)); + free(cbp->cb_handles); + } + + cbp->cb_handles = handles; + } + + cbp->cb_handles[cbp->cb_used++] = zhp; + + return (0); +} + +static void +get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count) +{ + get_all_cbdata_t cb = { 0 }; + cb.cb_types = types; + + (void) zfs_iter_root(g_zfs, get_one_dataset, &cb); + + *dslist = cb.cb_handles; + *count = cb.cb_used; +} + +static int +dataset_cmp(const void *a, const void *b) +{ + zfs_handle_t **za = (zfs_handle_t **)a; + zfs_handle_t **zb = (zfs_handle_t **)b; + char mounta[MAXPATHLEN]; + char mountb[MAXPATHLEN]; + boolean_t gota, gotb; + + if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) + verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, + sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); + if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) + verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, + sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); + + if (gota && gotb) + return (strcmp(mounta, mountb)); + + if (gota) + return (-1); + if (gotb) + return (1); + + return (strcmp(zfs_get_name(a), zfs_get_name(b))); +} + +/* + * Generic callback for sharing or mounting filesystems. Because the code is so + * similar, we have a common function with an extra parameter to determine which + * mode we are using. + */ +#define OP_SHARE 0x1 +#define OP_MOUNT 0x2 + +/* + * Share or mount a dataset. + */ +static int +share_mount_one(zfs_handle_t *zhp, int op, int flags, boolean_t explicit, + const char *options) +{ + char mountpoint[ZFS_MAXPROPLEN]; + char shareopts[ZFS_MAXPROPLEN]; + const char *cmdname = op == OP_SHARE ? "share" : "mount"; + struct mnttab mnt; + uint64_t zoned, canmount; + zfs_type_t type = zfs_get_type(zhp); + + assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)); + + if (type == ZFS_TYPE_FILESYSTEM) { + /* + * Check to make sure we can mount/share this dataset. If we + * are in the global zone and the filesystem is exported to a + * local zone, or if we are in a local zone and the + * filesystem is not exported, then it is an error. + */ + zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); + + if (zoned && getzoneid() == GLOBAL_ZONEID) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot %s '%s': " + "dataset is exported to a local zone\n"), cmdname, + zfs_get_name(zhp)); + return (1); + + } else if (!zoned && getzoneid() != GLOBAL_ZONEID) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot %s '%s': " + "permission denied\n"), cmdname, + zfs_get_name(zhp)); + return (1); + } + + /* + * Ignore any filesystems which don't apply to us. This + * includes those with a legacy mountpoint, or those with + * legacy share options. + */ + verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint, + sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0); + verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts, + sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0); + canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT); + + if (op == OP_SHARE && strcmp(shareopts, "off") == 0) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot share '%s': " + "legacy share\n"), zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use share(1M) to " + "share this filesystem\n")); + return (1); + } + + /* + * We cannot share or mount legacy filesystems. If the + * shareopts is non-legacy but the mountpoint is legacy, we + * treat it as a legacy share. + */ + if (strcmp(mountpoint, "legacy") == 0) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot %s '%s': " + "legacy mountpoint\n"), cmdname, zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use %s to " + "%s this filesystem\n"), op == OP_SHARE ? + "share(1M)" : "mount(1M)", cmdname); + return (1); + } + + if (strcmp(mountpoint, "none") == 0) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot %s '%s': no " + "mountpoint set\n"), cmdname, zfs_get_name(zhp)); + return (1); + } + + if (!canmount) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot %s '%s': " + "'canmount' property is set to 'off'\n"), cmdname, + zfs_get_name(zhp)); + return (1); + } + + /* + * At this point, we have verified that the mountpoint and/or + * shareopts are appropriate for auto management. If the + * filesystem is already mounted or shared, return (failing + * for explicit requests); otherwise mount or share the + * filesystem. + */ + switch (op) { + case OP_SHARE: + if (zfs_is_shared_nfs(zhp, NULL)) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot share " + "'%s': filesystem already shared\n"), + zfs_get_name(zhp)); + return (1); + } + + if (!zfs_is_mounted(zhp, NULL) && + zfs_mount(zhp, NULL, 0) != 0) + return (1); + + if (zfs_share_nfs(zhp) != 0) + return (1); + break; + + case OP_MOUNT: + if (options == NULL) + mnt.mnt_mntopts = ""; + else + mnt.mnt_mntopts = (char *)options; + + if (!hasmntopt(&mnt, MNTOPT_REMOUNT) && + zfs_is_mounted(zhp, NULL)) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot mount " + "'%s': filesystem already mounted\n"), + zfs_get_name(zhp)); + return (1); + } + + if (zfs_mount(zhp, options, flags) != 0) + return (1); + break; + } + } else { + assert(op == OP_SHARE); + + /* + * Ignore any volumes that aren't shared. + */ + verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts, + sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0); + + if (strcmp(shareopts, "off") == 0) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot share '%s': " + "'shareiscsi' property not set\n"), + zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("set 'shareiscsi' " + "property or use iscsitadm(1M) to share this " + "volume\n")); + return (1); + } + + if (zfs_is_shared_iscsi(zhp)) { + if (!explicit) + return (0); + + (void) fprintf(stderr, gettext("cannot share " + "'%s': volume already shared\n"), + zfs_get_name(zhp)); + return (1); + } + + if (zfs_share_iscsi(zhp) != 0) + return (1); + } + + return (0); +} + +static int +share_mount(int op, int argc, char **argv) +{ + int do_all = 0; + int c, ret = 0; + const char *options = NULL; + int types, flags = 0; + + /* check options */ + while ((c = getopt(argc, argv, op == OP_MOUNT ? ":ao:O" : "a")) + != -1) { + switch (c) { + case 'a': + do_all = 1; + break; + case 'o': + options = optarg; + break; + case 'O': + warnx("no overlay mounts support on FreeBSD, ignoring"); + break; + case ':': + (void) fprintf(stderr, gettext("missing argument for " + "'%c' option\n"), optopt); + usage(B_FALSE); + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + /* check number of arguments */ + if (do_all) { + zfs_handle_t **dslist = NULL; + size_t i, count = 0; + + if (op == OP_MOUNT) { + types = ZFS_TYPE_FILESYSTEM; + } else if (argc > 0) { + if (strcmp(argv[0], "nfs") == 0) { + types = ZFS_TYPE_FILESYSTEM; + } else if (strcmp(argv[0], "iscsi") == 0) { + types = ZFS_TYPE_VOLUME; + } else { + (void) fprintf(stderr, gettext("share type " + "must be 'nfs' or 'iscsi'\n")); + usage(B_FALSE); + } + + argc--; + argv++; + } else { + types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME; + } + + if (argc != 0) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + get_all_datasets(types, &dslist, &count); + + if (count == 0) + return (0); + + qsort(dslist, count, sizeof (void *), dataset_cmp); + + for (i = 0; i < count; i++) { + if (share_mount_one(dslist[i], op, flags, B_FALSE, + options) != 0) + ret = 1; + zfs_close(dslist[i]); + } + + free(dslist); + } else if (argc == 0) { + struct statfs *sfs; + int i, n; + + if (op == OP_SHARE) { + (void) fprintf(stderr, gettext("missing filesystem " + "argument\n")); + usage(B_FALSE); + } + + /* + * When mount is given no arguments, go through /etc/mnttab and + * display any active ZFS mounts. We hide any snapshots, since + * they are controlled automatically. + */ + if ((n = getmntinfo(&sfs, MNT_WAIT)) == 0) { + fprintf(stderr, "getmntinfo(): %s\n", strerror(errno)); + return (0); + } + for (i = 0; i < n; i++) { + if (strcmp(sfs[i].f_fstypename, MNTTYPE_ZFS) != 0 || + strchr(sfs[i].f_mntfromname, '@') != NULL) + continue; + + (void) printf("%-30s %s\n", sfs[i].f_mntfromname, + sfs[i].f_mntonname); + } + + } else { + zfs_handle_t *zhp; + + types = ZFS_TYPE_FILESYSTEM; + if (op == OP_SHARE) + types |= ZFS_TYPE_VOLUME; + + if (argc > 1) { + (void) fprintf(stderr, + gettext("too many arguments\n")); + usage(B_FALSE); + } + + if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) { + ret = 1; + } else { + ret = share_mount_one(zhp, op, flags, B_TRUE, + options); + zfs_close(zhp); + } + } + + return (ret); +} + +/* + * zfs mount -a [nfs | iscsi] + * zfs mount filesystem + * + * Mount all filesystems, or mount the given filesystem. + */ +static int +zfs_do_mount(int argc, char **argv) +{ + return (share_mount(OP_MOUNT, argc, argv)); +} + +/* + * zfs share -a [nfs | iscsi] + * zfs share filesystem + * + * Share all filesystems, or share the given filesystem. + */ +static int +zfs_do_share(int argc, char **argv) +{ + return (share_mount(OP_SHARE, argc, argv)); +} + +typedef struct unshare_unmount_node { + zfs_handle_t *un_zhp; + char *un_mountp; + uu_avl_node_t un_avlnode; +} unshare_unmount_node_t; + +/* ARGSUSED */ +static int +unshare_unmount_compare(const void *larg, const void *rarg, void *unused) +{ + const unshare_unmount_node_t *l = larg; + const unshare_unmount_node_t *r = rarg; + + return (strcmp(l->un_mountp, r->un_mountp)); +} + +/* + * Convenience routine used by zfs_do_umount() and manual_unmount(). Given an + * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem, + * and unmount it appropriately. + */ +static int +unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual) +{ + zfs_handle_t *zhp; + int ret; + struct mnttab search = { 0 }, entry; + const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount"; + char property[ZFS_MAXPROPLEN]; + + /* + * Search for the given (major,minor) pair in the mount table. + */ + search.mnt_mountp = path; + rewind(mnttab_file); + if (getmntany(mnttab_file, &entry, &search) != 0) { + (void) fprintf(stderr, gettext("cannot %s '%s': not " + "currently mounted\n"), cmdname, path); + return (1); + } + + if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) { + (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS " + "filesystem\n"), cmdname, path); + return (1); + } + + if ((zhp = zfs_open(g_zfs, entry.mnt_special, + ZFS_TYPE_FILESYSTEM)) == NULL) + return (1); + + verify(zfs_prop_get(zhp, op == OP_SHARE ? + ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, property, + sizeof (property), NULL, NULL, 0, B_FALSE) == 0); + + if (op == OP_SHARE) { + if (strcmp(property, "off") == 0) { + (void) fprintf(stderr, gettext("cannot unshare " + "'%s': legacy share\n"), path); + (void) fprintf(stderr, gettext("use " + "unshare(1M) to unshare this filesystem\n")); + ret = 1; + } else if (!zfs_is_shared_nfs(zhp, NULL)) { + (void) fprintf(stderr, gettext("cannot unshare '%s': " + "not currently shared\n"), path); + ret = 1; + } else { + ret = zfs_unshareall_nfs(zhp); + } + } else { + if (is_manual) { + ret = zfs_unmount(zhp, NULL, flags); + } else if (strcmp(property, "legacy") == 0) { + (void) fprintf(stderr, gettext("cannot unmount " + "'%s': legacy mountpoint\n"), + zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use umount(1M) " + "to unmount this filesystem\n")); + ret = 1; + } else { + ret = zfs_unmountall(zhp, flags); + } + } + + zfs_close(zhp); + + return (ret != 0); +} + +/* + * Generic callback for unsharing or unmounting a filesystem. + */ +static int +unshare_unmount(int op, int argc, char **argv) +{ + int do_all = 0; + int flags = 0; + int ret = 0; + int types, c; + zfs_handle_t *zhp; + char property[ZFS_MAXPROPLEN]; + + /* check options */ + while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) { + switch (c) { + case 'a': + do_all = 1; + break; + case 'f': + flags = MS_FORCE; + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + usage(B_FALSE); + } + } + + argc -= optind; + argv += optind; + + if (do_all) { + /* + * We could make use of zfs_for_each() to walk all datasets in + * the system, but this would be very inefficient, especially + * since we would have to linearly search /etc/mnttab for each + * one. Instead, do one pass through /etc/mnttab looking for + * zfs entries and call zfs_unmount() for each one. + * + * Things get a little tricky if the administrator has created + * mountpoints beneath other ZFS filesystems. In this case, we + * have to unmount the deepest filesystems first. To accomplish + * this, we place all the mountpoints in an AVL tree sorted by + * the special type (dataset name), and walk the result in + * reverse to make sure to get any snapshots first. + */ + uu_avl_pool_t *pool; + uu_avl_t *tree; + unshare_unmount_node_t *node; + uu_avl_index_t idx; + uu_avl_walk_t *walk; + struct statfs *sfs; + int i, n; + + if (argc != 0) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + if ((pool = uu_avl_pool_create("unmount_pool", + sizeof (unshare_unmount_node_t), + offsetof(unshare_unmount_node_t, un_avlnode), + unshare_unmount_compare, + UU_DEFAULT)) == NULL) { + (void) fprintf(stderr, gettext("internal error: " + "out of memory\n")); + exit(1); + } + + if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) { + (void) fprintf(stderr, gettext("internal error: " + "out of memory\n")); + exit(1); + } + + if ((n = getmntinfo(&sfs, MNT_WAIT)) == 0) { + (void) fprintf(stderr, gettext("internal error: " + "getmntinfo() failed\n")); + exit(1); + } + for (i = 0; i < n; i++) { + + /* ignore non-ZFS entries */ + if (strcmp(sfs[i].f_fstypename, MNTTYPE_ZFS) != 0) + continue; + + /* ignore snapshots */ + if (strchr(sfs[i].f_mntfromname, '@') != NULL) + continue; + + if ((zhp = zfs_open(g_zfs, sfs[i].f_mntfromname, + ZFS_TYPE_FILESYSTEM)) == NULL) { + ret = 1; + continue; + } + + verify(zfs_prop_get(zhp, op == OP_SHARE ? + ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, + property, sizeof (property), NULL, NULL, + 0, B_FALSE) == 0); + + /* Ignore legacy mounts and shares */ + if ((op == OP_SHARE && + strcmp(property, "off") == 0) || + (op == OP_MOUNT && + strcmp(property, "legacy") == 0)) { + zfs_close(zhp); + continue; + } + + node = safe_malloc(sizeof (unshare_unmount_node_t)); + node->un_zhp = zhp; + + if ((node->un_mountp = strdup(sfs[i].f_mntonname)) == + NULL) { + (void) fprintf(stderr, gettext("internal error:" + " out of memory\n")); + exit(1); + } + + uu_avl_node_init(node, &node->un_avlnode, pool); + + if (uu_avl_find(tree, node, NULL, &idx) == NULL) { + uu_avl_insert(tree, node, idx); + } else { + zfs_close(node->un_zhp); + free(node->un_mountp); + free(node); + } + } + + /* + * Walk the AVL tree in reverse, unmounting each filesystem and + * removing it from the AVL tree in the process. + */ + if ((walk = uu_avl_walk_start(tree, + UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) { + (void) fprintf(stderr, + gettext("internal error: out of memory")); + exit(1); + } + + while ((node = uu_avl_walk_next(walk)) != NULL) { + uu_avl_remove(tree, node); + + switch (op) { + case OP_SHARE: + if (zfs_unshare_nfs(node->un_zhp, + node->un_mountp) != 0) + ret = 1; + break; + + case OP_MOUNT: + if (zfs_unmount(node->un_zhp, + node->un_mountp, flags) != 0) + ret = 1; + break; + } + + zfs_close(node->un_zhp); + free(node->un_mountp); + free(node); + } + + uu_avl_walk_end(walk); + uu_avl_destroy(tree); + uu_avl_pool_destroy(pool); + + if (op == OP_SHARE) { + /* + * Finally, unshare any volumes shared via iSCSI. + */ + zfs_handle_t **dslist = NULL; + size_t i, count = 0; + + get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count); + + if (count != 0) { + qsort(dslist, count, sizeof (void *), + dataset_cmp); + + for (i = 0; i < count; i++) { + if (zfs_unshare_iscsi(dslist[i]) != 0) + ret = 1; + zfs_close(dslist[i]); + } + + free(dslist); + } + } + } else { + if (argc != 1) { + if (argc == 0) + (void) fprintf(stderr, + gettext("missing filesystem argument\n")); + else + (void) fprintf(stderr, + gettext("too many arguments\n")); + usage(B_FALSE); + } + + /* + * We have an argument, but it may be a full path or a ZFS + * filesystem. Pass full paths off to unmount_path() (shared by + * manual_unmount), otherwise open the filesystem and pass to + * zfs_unmount(). + */ + if (argv[0][0] == '/') + return (unshare_unmount_path(op, argv[0], + flags, B_FALSE)); + + types = ZFS_TYPE_FILESYSTEM; + if (op == OP_SHARE) + types |= ZFS_TYPE_VOLUME; + + if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) + return (1); + + if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { + verify(zfs_prop_get(zhp, op == OP_SHARE ? + ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, property, + sizeof (property), NULL, NULL, 0, B_FALSE) == 0); + + switch (op) { + case OP_SHARE: + if (strcmp(property, "off") == 0) { + (void) fprintf(stderr, gettext("cannot " + "unshare '%s': legacy share\n"), + zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use " + "unshare(1M) to unshare this " + "filesystem\n")); + ret = 1; + } else if (!zfs_is_shared_nfs(zhp, NULL)) { + (void) fprintf(stderr, gettext("cannot " + "unshare '%s': not currently " + "shared\n"), zfs_get_name(zhp)); + ret = 1; + } else if (zfs_unshareall_nfs(zhp) != 0) { + ret = 1; + } + break; + + case OP_MOUNT: + if (strcmp(property, "legacy") == 0) { + (void) fprintf(stderr, gettext("cannot " + "unmount '%s': legacy " + "mountpoint\n"), zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("use " + "umount(1M) to unmount this " + "filesystem\n")); + ret = 1; + } else if (!zfs_is_mounted(zhp, NULL)) { + (void) fprintf(stderr, gettext("cannot " + "unmount '%s': not currently " + "mounted\n"), + zfs_get_name(zhp)); + ret = 1; + } else if (zfs_unmountall(zhp, flags) != 0) { + ret = 1; + } + break; + } + } else { + assert(op == OP_SHARE); + + verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, property, + sizeof (property), NULL, NULL, 0, B_FALSE) == 0); + + if (strcmp(property, "off") == 0) { + (void) fprintf(stderr, gettext("cannot unshare " + "'%s': 'shareiscsi' property not set\n"), + zfs_get_name(zhp)); + (void) fprintf(stderr, gettext("set " + "'shareiscsi' property or use " + "iscsitadm(1M) to share this volume\n")); + ret = 1; + } else if (!zfs_is_shared_iscsi(zhp)) { + (void) fprintf(stderr, gettext("cannot " + "unshare '%s': not currently shared\n"), + zfs_get_name(zhp)); + ret = 1; + } else if (zfs_unshare_iscsi(zhp) != 0) { + ret = 1; + } + } + + zfs_close(zhp); + } + + return (ret); +} + +/* + * zfs unmount -a + * zfs unmount filesystem + * + * Unmount all filesystems, or a specific ZFS filesystem. + */ +static int +zfs_do_unmount(int argc, char **argv) +{ + return (unshare_unmount(OP_MOUNT, argc, argv)); +} + +/* + * zfs unshare -a + * zfs unshare filesystem + * + * Unshare all filesystems, or a specific ZFS filesystem. + */ +static int +zfs_do_unshare(int argc, char **argv) +{ + return (unshare_unmount(OP_SHARE, argc, argv)); +} + +/* + * Attach/detach the given dataset to/from the given jail + */ +/* ARGSUSED */ +static int +do_jail(int argc, char **argv, int attach) +{ + zfs_handle_t *zhp; + int jailid, ret; + + /* check number of arguments */ + if (argc < 3) { + (void) fprintf(stderr, gettext("missing argument(s)\n")); + usage(B_FALSE); + } + if (argc > 3) { + (void) fprintf(stderr, gettext("too many arguments\n")); + usage(B_FALSE); + } + + jailid = atoi(argv[1]); + if (jailid == 0) { + (void) fprintf(stderr, gettext("invalid jailid\n")); + usage(B_FALSE); + } + + zhp = zfs_open(g_zfs, argv[2], ZFS_TYPE_FILESYSTEM); + if (zhp == NULL) + return (1); + + ret = (zfs_jail(zhp, jailid, attach) != 0); + + if (!ret) + zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); + + zfs_close(zhp); + return (ret); +} + +/* + * zfs jail jailid filesystem + * + * Attach the given dataset to the given jail + */ +/* ARGSUSED */ +static int +zfs_do_jail(int argc, char **argv) +{ + + return (do_jail(argc, argv, 1)); +} + +/* + * zfs unjail jailid filesystem + * + * Detach the given dataset from the given jail + */ +/* ARGSUSED */ +static int +zfs_do_unjail(int argc, char **argv) +{ + + return (do_jail(argc, argv, 0)); +} + +/* + * Called when invoked as /etc/fs/zfs/mount. Do the mount if the mountpoint is + * 'legacy'. Otherwise, complain that use should be using 'zfs mount'. + */ +static int +manual_mount(int argc, char **argv) +{ + zfs_handle_t *zhp; + char mountpoint[ZFS_MAXPROPLEN]; + char mntopts[MNT_LINE_MAX] = { '\0' }; + int ret; + int c; + int flags = 0; + char *dataset, *path; + + /* check options */ + while ((c = getopt(argc, argv, ":mo:O")) != -1) { + switch (c) { + case 'o': + (void) strlcpy(mntopts, optarg, sizeof (mntopts)); + break; + case 'O': +#if 0 /* FreeBSD: No support for MS_OVERLAY. */ + flags |= MS_OVERLAY; +#endif + break; + case 'm': +#if 0 /* FreeBSD: No support for MS_NOMNTTAB. */ + flags |= MS_NOMNTTAB; +#endif + break; + case ':': + (void) fprintf(stderr, gettext("missing argument for " + "'%c' option\n"), optopt); + usage(B_FALSE); + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + (void) fprintf(stderr, gettext("usage: mount [-o opts] " + "<path>\n")); + return (2); + } + } + + argc -= optind; + argv += optind; + + /* check that we only have two arguments */ + if (argc != 2) { + if (argc == 0) + (void) fprintf(stderr, gettext("missing dataset " + "argument\n")); + else if (argc == 1) + (void) fprintf(stderr, + gettext("missing mountpoint argument\n")); + else + (void) fprintf(stderr, gettext("too many arguments\n")); + (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n"); + return (2); + } + + dataset = argv[0]; + path = argv[1]; + + /* try to open the dataset */ + if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL) + return (1); + + (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint, + sizeof (mountpoint), NULL, NULL, 0, B_FALSE); + + /* check for legacy mountpoint and complain appropriately */ + ret = 0; + if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) { + if (zmount(dataset, path, flags, MNTTYPE_ZFS, + NULL, 0, mntopts, sizeof (mntopts)) != 0) { + (void) fprintf(stderr, gettext("mount failed: %s\n"), + strerror(errno)); + ret = 1; + } + } else { + (void) fprintf(stderr, gettext("filesystem '%s' cannot be " + "mounted using 'mount -F zfs'\n"), dataset); + (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' " + "instead.\n"), path); + (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' " + "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n")); + (void) fprintf(stderr, gettext("See zfs(1M) for more " + "information.\n")); + ret = 1; + } + + return (ret); +} + +/* + * Called when invoked as /etc/fs/zfs/umount. Unlike a manual mount, we allow + * unmounts of non-legacy filesystems, as this is the dominant administrative + * interface. + */ +static int +manual_unmount(int argc, char **argv) +{ + int flags = 0; + int c; + + /* check options */ + while ((c = getopt(argc, argv, "f")) != -1) { + switch (c) { + case 'f': + flags = MS_FORCE; + break; + case '?': + (void) fprintf(stderr, gettext("invalid option '%c'\n"), + optopt); + (void) fprintf(stderr, gettext("usage: unmount [-f] " + "<path>\n")); + return (2); + } + } + + argc -= optind; + argv += optind; + + /* check arguments */ + if (argc != 1) { + if (argc == 0) + (void) fprintf(stderr, gettext("missing path " + "argument\n")); + else + (void) fprintf(stderr, gettext("too many arguments\n")); + (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n")); + return (2); + } + + return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE)); +} + +static int +volcheck(zpool_handle_t *zhp, void *data) +{ + boolean_t isinit = *((boolean_t *)data); + + if (isinit) + return (zpool_create_zvol_links(zhp)); + else + return (zpool_remove_zvol_links(zhp)); +} + +/* + * Iterate over all pools in the system and either create or destroy /dev/zvol + * links, depending on the value of 'isinit'. + */ +static int +do_volcheck(boolean_t isinit) +{ + return (zpool_iter(g_zfs, volcheck, &isinit) ? 1 : 0); +} + +int +main(int argc, char **argv) +{ + int ret; + int i; + char *progname; + char *cmdname; + + (void) setlocale(LC_ALL, ""); + (void) textdomain(TEXT_DOMAIN); + + opterr = 0; + + if ((g_zfs = libzfs_init()) == NULL) { + (void) fprintf(stderr, gettext("internal error: failed to " + "initialize ZFS library\n")); + return (1); + } + + libzfs_print_on_error(g_zfs, B_TRUE); + + if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) { + (void) fprintf(stderr, gettext("internal error: unable to " + "open %s\n"), MNTTAB); + return (1); + } + + /* + * This command also doubles as the /etc/fs mount and unmount program. + * Determine if we should take this behavior based on argv[0]. + */ + progname = basename(argv[0]); + if (strcmp(progname, "mount") == 0) { + ret = manual_mount(argc, argv); + } else if (strcmp(progname, "umount") == 0) { + ret = manual_unmount(argc, argv); + } else { + /* + * Make sure the user has specified some command. + */ + if (argc < 2) { + (void) fprintf(stderr, gettext("missing command\n")); + usage(B_FALSE); + } + + cmdname = argv[1]; + + /* + * The 'umount' command is an alias for 'unmount' + */ + if (strcmp(cmdname, "umount") == 0) + cmdname = "unmount"; + + /* + * The 'recv' command is an alias for 'receive' + */ + if (strcmp(cmdname, "recv") == 0) + cmdname = "receive"; + + /* + * Special case '-?' + */ + if (strcmp(cmdname, "-?") == 0) + usage(B_TRUE); + + /* + * 'volinit' and 'volfini' do not appear in the usage message, + * so we have to special case them here. + */ + if (strcmp(cmdname, "volinit") == 0) + return (do_volcheck(B_TRUE)); + else if (strcmp(cmdname, "volfini") == 0) + return (do_volcheck(B_FALSE)); + + /* + * Run the appropriate command. + */ + for (i = 0; i < NCOMMAND; i++) { + if (command_table[i].name == NULL) + continue; + + if (strcmp(cmdname, command_table[i].name) == 0) { + current_command = &command_table[i]; + ret = command_table[i].func(argc - 1, argv + 1); + break; + } + } + + if (i == NCOMMAND) { + (void) fprintf(stderr, gettext("unrecognized " + "command '%s'\n"), cmdname); + usage(B_FALSE); + } + } + + (void) fclose(mnttab_file); + + libzfs_fini(g_zfs); + + /* + * The 'ZFS_ABORT' environment variable causes us to dump core on exit + * for the purposes of running ::findleaks. + */ + if (getenv("ZFS_ABORT") != NULL) { + (void) printf("dumping core by request\n"); + abort(); + } + + return (ret); +} |
