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zfs/cmd/zfs/zfs_main.c

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/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <libgen.h>
#include <libintl.h>
#include <libuutil.h>
#include <libnvpair.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/mkdev.h>
#include <sys/mntent.h>
#include <sys/mnttab.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/avl.h>
#include <libzfs.h>
#include <libuutil.h>
#include "zfs_iter.h"
#include "zfs_util.h"
libzfs_handle_t *g_zfs;
static FILE *mnttab_file;
static char history_str[HIS_MAX_RECORD_LEN];
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_upgrade(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_allow(int argc, char **argv);
static int zfs_do_unallow(int argc, char **argv);
/*
* Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
*/
#ifdef DEBUG
const char *
_umem_debug_init(void)
{
return ("default,verbose"); /* $UMEM_DEBUG setting */
}
const char *
_umem_logging_init(void)
{
return ("fail,contents"); /* $UMEM_LOGGING setting */
}
#endif
typedef enum {
HELP_CLONE,
HELP_CREATE,
HELP_DESTROY,
HELP_GET,
HELP_INHERIT,
HELP_UPGRADE,
HELP_LIST,
HELP_MOUNT,
HELP_PROMOTE,
HELP_RECEIVE,
HELP_RENAME,
HELP_ROLLBACK,
HELP_SEND,
HELP_SET,
HELP_SHARE,
HELP_SNAPSHOT,
HELP_UNMOUNT,
HELP_UNSHARE,
HELP_ALLOW,
HELP_UNALLOW
} 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 },
{ "upgrade", zfs_do_upgrade, HELP_UPGRADE },
{ NULL },
{ "mount", zfs_do_mount, HELP_MOUNT },
{ "unmount", zfs_do_unmount, HELP_UNMOUNT },
{ "share", zfs_do_share, HELP_SHARE },
{ "unshare", zfs_do_unshare, HELP_UNSHARE },
{ NULL },
{ "send", zfs_do_send, HELP_SEND },
{ "receive", zfs_do_receive, HELP_RECEIVE },
{ NULL },
{ "allow", zfs_do_allow, HELP_ALLOW },
{ NULL },
{ "unallow", zfs_do_unallow, HELP_UNALLOW },
};
#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 [-p] [-o property=value] ... "
"<snapshot> <filesystem|volume>\n"));
case HELP_CREATE:
return (gettext("\tcreate [-p] [-o property=value] ... "
"<filesystem>\n"
"\tcreate [-ps] [-b blocksize] [-o property=value] ... "
"-V <size> <volume>\n"));
case HELP_DESTROY:
return (gettext("\tdestroy [-rRf] "
"<filesystem|volume|snapshot>\n"));
case HELP_GET:
return (gettext("\tget [-rHp] [-o field[,...]] "
"[-s source[,...]]\n"
"\t <\"all\" | property[,...]> "
"[filesystem|volume|snapshot] ...\n"));
case HELP_INHERIT:
return (gettext("\tinherit [-r] <property> "
"<filesystem|volume|snapshot> ...\n"));
case HELP_UPGRADE:
return (gettext("\tupgrade [-v]\n"
"\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
case HELP_LIST:
return (gettext("\tlist [-rH] [-o property[,...]] "
"[-t type[,...]] [-s property] ...\n"
"\t [-S property] ... "
"[filesystem|volume|snapshot] ...\n"));
case HELP_MOUNT:
return (gettext("\tmount\n"
"\tmount [-vO] [-o opts] <-a | 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"
"\trename -p <filesystem|volume> <filesystem|volume>\n"
"\trename -r <snapshot> <snapshot>"));
case HELP_ROLLBACK:
return (gettext("\trollback [-rRf] <snapshot>\n"));
case HELP_SEND:
return (gettext("\tsend [-R] [-[iI] snapshot] <snapshot>\n"));
case HELP_SET:
return (gettext("\tset <property=value> "
"<filesystem|volume|snapshot> ...\n"));
case HELP_SHARE:
return (gettext("\tshare <-a | filesystem>\n"));
case HELP_SNAPSHOT:
return (gettext("\tsnapshot [-r] [-o property=value] ... "
"<filesystem@snapname|volume@snapname>\n"));
case HELP_UNMOUNT:
return (gettext("\tunmount [-f] "
"<-a | filesystem|mountpoint>\n"));
case HELP_UNSHARE:
return (gettext("\tunshare [-f] "
"<-a | filesystem|mountpoint>\n"));
case HELP_ALLOW:
return (gettext("\tallow [-ldug] "
"<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
"\t <filesystem|volume>\n"
"\tallow [-ld] -e <perm|@setname>[,...] "
"<filesystem|volume>\n"
"\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
"\tallow -s @setname <perm|@setname>[,...] "
"<filesystem|volume>\n"));
case HELP_UNALLOW:
return (gettext("\tunallow [-rldug] "
"<\"everyone\"|user|group>[,...]\n"
"\t [<perm|@setname>[,...]] <filesystem|volume>\n"
"\tunallow [-rld] -e [<perm|@setname>[,...]] "
"<filesystem|volume>\n"
"\tunallow [-r] -c [<perm|@setname>[,...]] "
"<filesystem|volume>\n"
"\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
"<filesystem|volume>\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 routine that will print out information for each of
* the properties.
*/
static int
usage_prop_cb(int prop, void *cb)
{
FILE *fp = cb;
(void) fprintf(fp, "\t%-15s ", 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 (ZPROP_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;
boolean_t show_permissions = 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 (current_command != NULL &&
(strcmp(current_command->name, "allow") == 0 ||
strcmp(current_command->name, "unallow") == 0))
show_permissions = B_TRUE;
if (show_properties) {
(void) fprintf(fp,
gettext("\nThe following properties are supported:\n"));
(void) fprintf(fp, "\n\t%-14s %s %s %s\n\n",
"PROPERTY", "EDIT", "INHERIT", "VALUES");
/* Iterate over all properties */
(void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
ZFS_TYPE_DATASET);
(void) fprintf(fp, gettext("\nSizes are specified in bytes "
"with standard units such as K, M, G, etc.\n"));
(void) fprintf(fp, gettext("\nUser-defined properties can "
"be specified by using a name containing a colon (:).\n"));
} else if (show_permissions) {
(void) fprintf(fp,
gettext("\nThe following permissions are supported:\n"));
zfs_deleg_permissions();
} 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"));
(void) fprintf(fp,
gettext("\nFor the delegated permission list, run:"
" zfs allow|unallow\n"));
}
/*
* See comments at end of main().
*/
if (getenv("ZFS_ABORT") != NULL) {
(void) printf("dumping core by request\n");
abort();
}
exit(requested ? 0 : 2);
}
static int
parseprop(nvlist_t *props)
{
char *propname = optarg;
char *propval, *strval;
if ((propval = strchr(propname, '=')) == NULL) {
(void) fprintf(stderr, gettext("missing "
"'=' for -o option\n"));
return (-1);
}
*propval = '\0';
propval++;
if (nvlist_lookup_string(props, propname, &strval) == 0) {
(void) fprintf(stderr, gettext("property '%s' "
"specified multiple times\n"), propname);
return (-1);
}
if (nvlist_add_string(props, propname, propval) != 0) {
(void) fprintf(stderr, gettext("internal "
"error: out of memory\n"));
return (-1);
}
return (0);
}
/*
* zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
*
* 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.
*
* The '-p' flag creates all the non-existing ancestors of the target first.
*/
static int
zfs_do_clone(int argc, char **argv)
{
zfs_handle_t *zhp = NULL;
boolean_t parents = B_FALSE;
nvlist_t *props;
int ret;
int c;
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, "o:p")) != -1) {
switch (c) {
case 'o':
if (parseprop(props))
return (1);
break;
case 'p':
parents = B_TRUE;
break;
case '?':
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
goto usage;
}
}
argc -= optind;
argv += optind;
/* check number of arguments */
if (argc < 1) {
(void) fprintf(stderr, gettext("missing source dataset "
"argument\n"));
goto usage;
}
if (argc < 2) {
(void) fprintf(stderr, gettext("missing target dataset "
"argument\n"));
goto usage;
}
if (argc > 2) {
(void) fprintf(stderr, gettext("too many arguments\n"));
goto usage;
}
/* open the source dataset */
if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
return (1);
if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
ZFS_TYPE_VOLUME)) {
/*
* Now create the ancestors of the target dataset. If the
* target already exists and '-p' option was used we should not
* complain.
*/
if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
ZFS_TYPE_VOLUME))
return (0);
if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
return (1);
}
/* pass to libzfs */
ret = zfs_clone(zhp, argv[1], props);
/* create the mountpoint if necessary */
#ifdef HAVE_ZPL
if (ret == 0) {
zfs_handle_t *clone;
clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
if (clone != NULL) {
if ((ret = zfs_mount(clone, NULL, 0)) == 0)
ret = zfs_share(clone);
zfs_close(clone);
}
}
#endif /* HAVE_ZPL */
zfs_close(zhp);
nvlist_free(props);
return (!!ret);
usage:
if (zhp)
zfs_close(zhp);
nvlist_free(props);
usage(B_FALSE);
return (-1);
}
/*
* zfs create [-p] [-o prop=value] ... fs
* zfs create [-ps] [-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. For pools with SPA_VERSION >=
* SPA_VERSION_REFRESERVATION, we set a refreservation instead.
*
* The '-p' flag creates all the non-existing ancestors of the target first.
*/
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;
boolean_t bflag = B_FALSE;
boolean_t parents = B_FALSE;
int ret = 1;
nvlist_t *props;
uint64_t intval;
int canmount;
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:p")) != -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 'p':
parents = B_TRUE;
break;
case 'b':
bflag = B_TRUE;
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':
if (parseprop(props))
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 ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
(void) fprintf(stderr, gettext("'-s' and '-b' 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) {
zpool_handle_t *zpool_handle;
uint64_t spa_version;
char *p;
zfs_prop_t resv_prop;
char *strval;
if (p = strchr(argv[0], '/'))
*p = '\0';
zpool_handle = zpool_open(g_zfs, argv[0]);
if (p != NULL)
*p = '/';
if (zpool_handle == NULL)
goto error;
spa_version = zpool_get_prop_int(zpool_handle,
ZPOOL_PROP_VERSION, NULL);
zpool_close(zpool_handle);
if (spa_version >= SPA_VERSION_REFRESERVATION)
resv_prop = ZFS_PROP_REFRESERVATION;
else
resv_prop = ZFS_PROP_RESERVATION;
if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
&strval) != 0) {
if (nvlist_add_uint64(props,
zfs_prop_to_name(resv_prop), volsize) != 0) {
(void) fprintf(stderr, gettext("internal "
"error: out of memory\n"));
nvlist_free(props);
return (1);
}
}
}
if (parents && zfs_name_valid(argv[0], type)) {
/*
* Now create the ancestors of target dataset. If the target
* already exists and '-p' option was used we should not
* complain.
*/
if (zfs_dataset_exists(g_zfs, argv[0], type)) {
ret = 0;
goto error;
}
if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
goto error;
}
/* pass to libzfs */
if (zfs_create(g_zfs, argv[0], type, props) != 0)
goto error;
if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
goto error;
/*
* if the user doesn't want the dataset automatically mounted,
* then skip the mount/share step
*/
canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
/*
* 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.
*/
ret = 0;
#ifdef HAVE_ZPL
if (canmount == ZFS_CANMOUNT_ON) {
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;
}
}
#endif /* HAVE_ZPL */
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);
}
#ifdef HAVE_ZPL
/*
* 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);
}
#endif /* HAVE_ZPL */
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_DATASET)) == 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"));
}
return (ret != 0);
}
/* Open the given dataset */
if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == 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);
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];
zprop_source_t sourcetype;
char source[ZFS_MAXNAMELEN];
zprop_get_cbdata_t *cbp = data;
nvlist_t *userprop = zfs_get_user_props(zhp);
zprop_list_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 != ZPROP_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_DATASET)) {
(void) fprintf(stderr,
gettext("No such property '%s'\n"),
zfs_prop_to_name(pl->pl_prop));
continue;
}
sourcetype = ZPROP_SRC_NONE;
(void) strlcpy(buf, "-", sizeof (buf));
}
zprop_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 = ZPROP_SRC_NONE;
strval = "-";
} else {
verify(nvlist_lookup_string(propval,
ZPROP_VALUE, &strval) == 0);
verify(nvlist_lookup_string(propval,
ZPROP_SOURCE, &sourceval) == 0);
if (strcmp(sourceval,
zfs_get_name(zhp)) == 0) {
sourcetype = ZPROP_SRC_LOCAL;
} else {
sourcetype = ZPROP_SRC_INHERITED;
(void) strlcpy(source,
sourceval, sizeof (source));
}
}
zprop_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)
{
zprop_get_cbdata_t cb = { 0 };
int i, c, flags = 0;
char *value, *fields;
int ret;
zprop_list_t fake_name = { 0 };
/*
* Set up default columns and sources.
*/
cb.cb_sources = ZPROP_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;
cb.cb_type = ZFS_TYPE_DATASET;
/* check options */
while ((c = getopt(argc, argv, ":o:s:rHp")) != -1) {
switch (c) {
case 'p':
cb.cb_literal = B_TRUE;
break;
case 'r':
flags |= ZFS_ITER_RECURSE;
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 |= ZPROP_SRC_LOCAL;
break;
case 1:
cb.cb_sources |= ZPROP_SRC_DEFAULT;
break;
case 2:
cb.cb_sources |= ZPROP_SRC_INHERITED;
break;
case 3:
cb.cb_sources |= ZPROP_SRC_TEMPORARY;
break;
case 4:
cb.cb_sources |= ZPROP_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 (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
!= 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, flags, ZFS_TYPE_DATASET, NULL,
&cb.cb_proplist, get_callback, &cb);
if (cb.cb_proplist == &fake_name)
zprop_free_list(fake_name.pl_next);
else
zprop_free_list(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.
*/
static int
inherit_recurse_cb(zfs_handle_t *zhp, void *data)
{
char *propname = data;
zfs_prop_t prop = zfs_name_to_prop(propname);
/*
* If we're doing it recursively, then ignore properties that
* are not valid for this type of dataset.
*/
if (prop != ZPROP_INVAL &&
!zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
return (0);
return (zfs_prop_inherit(zhp, propname) != 0);
}
static int
inherit_cb(zfs_handle_t *zhp, void *data)
{
char *propname = data;
return (zfs_prop_inherit(zhp, propname) != 0);
}
static int
zfs_do_inherit(int argc, char **argv)
{
int c;
zfs_prop_t prop;
char *propname;
int ret;
int flags = 0;
/* check options */
while ((c = getopt(argc, argv, "r")) != -1) {
switch (c) {
case 'r':
flags |= ZFS_ITER_RECURSE;
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);
}
propname = argv[0];
argc--;
argv++;
if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
if (zfs_prop_readonly(prop)) {
(void) fprintf(stderr, gettext(
"%s property is read-only\n"),
propname);
return (1);
}
if (!zfs_prop_inheritable(prop)) {
(void) fprintf(stderr, gettext("'%s' property cannot "
"be inherited\n"), propname);
if (prop == ZFS_PROP_QUOTA ||
prop == ZFS_PROP_RESERVATION ||
prop == ZFS_PROP_REFQUOTA ||
prop == ZFS_PROP_REFRESERVATION)
(void) fprintf(stderr, gettext("use 'zfs set "
"%s=none' to clear\n"), propname);
return (1);
}
} else if (!zfs_prop_user(propname)) {
(void) fprintf(stderr, gettext("invalid property '%s'\n"),
propname);
usage(B_FALSE);
}
if (flags & ZFS_ITER_RECURSE) {
ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
NULL, NULL, inherit_recurse_cb, propname);
} else {
ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
NULL, NULL, inherit_cb, propname);
}
return (ret);
}
typedef struct upgrade_cbdata {
uint64_t cb_numupgraded;
uint64_t cb_numsamegraded;
uint64_t cb_numfailed;
uint64_t cb_version;
boolean_t cb_newer;
boolean_t cb_foundone;
char cb_lastfs[ZFS_MAXNAMELEN];
} upgrade_cbdata_t;
static int
same_pool(zfs_handle_t *zhp, const char *name)
{
int len1 = strcspn(name, "/@");
const char *zhname = zfs_get_name(zhp);
int len2 = strcspn(zhname, "/@");
if (len1 != len2)
return (B_FALSE);
return (strncmp(name, zhname, len1) == 0);
}
static int
upgrade_list_callback(zfs_handle_t *zhp, void *data)
{
upgrade_cbdata_t *cb = data;
int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
/* list if it's old/new */
if ((!cb->cb_newer && version < ZPL_VERSION) ||
(cb->cb_newer && version > ZPL_VERSION)) {
char *str;
if (cb->cb_newer) {
str = gettext("The following filesystems are "
"formatted using a newer software version and\n"
"cannot be accessed on the current system.\n\n");
} else {
str = gettext("The following filesystems are "
"out of date, and can be upgraded. After being\n"
"upgraded, these filesystems (and any 'zfs send' "
"streams generated from\n"
"subsequent snapshots) will no longer be "
"accessible by older software versions.\n\n");
}
if (!cb->cb_foundone) {
(void) puts(str);
(void) printf(gettext("VER FILESYSTEM\n"));
(void) printf(gettext("--- ------------\n"));
cb->cb_foundone = B_TRUE;
}
(void) printf("%2u %s\n", version, zfs_get_name(zhp));
}
return (0);
}
static int
upgrade_set_callback(zfs_handle_t *zhp, void *data)
{
upgrade_cbdata_t *cb = data;
int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
if (cb->cb_version >= ZPL_VERSION_FUID) {
int spa_version;
if (zfs_spa_version(zhp, &spa_version) < 0)
return (-1);
if (spa_version < SPA_VERSION_FUID) {
/* can't upgrade */
(void) printf(gettext("%s: can not be upgraded; "
"the pool version needs to first be upgraded\nto "
"version %llu\n\n"),
zfs_get_name(zhp), SPA_VERSION_FUID);
cb->cb_numfailed++;
return (0);
}
}
/* upgrade */
if (version < cb->cb_version) {
char verstr[16];
(void) snprintf(verstr, sizeof (verstr),
"%llu", (u_longlong_t)cb->cb_version);
if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
/*
* If they did "zfs upgrade -a", then we could
* be doing ioctls to different pools. We need
* to log this history once to each pool.
*/
verify(zpool_stage_history(g_zfs, history_str) == 0);
}
if (zfs_prop_set(zhp, "version", verstr) == 0)
cb->cb_numupgraded++;
else
cb->cb_numfailed++;
(void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
} else if (version > cb->cb_version) {
/* can't downgrade */
(void) printf(gettext("%s: can not be downgraded; "
"it is already at version %u\n"),
zfs_get_name(zhp), version);
cb->cb_numfailed++;
} else {
cb->cb_numsamegraded++;
}
return (0);
}
/*
* zfs upgrade
* zfs upgrade -v
* zfs upgrade [-r] [-V <version>] <-a | filesystem>
*/
static int
zfs_do_upgrade(int argc, char **argv)
{
boolean_t all = B_FALSE;
boolean_t showversions = B_FALSE;
int ret;
upgrade_cbdata_t cb = { 0 };
char c;
int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
/* check options */
while ((c = getopt(argc, argv, "rvV:a")) != -1) {
switch (c) {
case 'r':
flags |= ZFS_ITER_RECURSE;
break;
case 'v':
showversions = B_TRUE;
break;
case 'V':
if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
optarg, &cb.cb_version) != 0) {
(void) fprintf(stderr,
gettext("invalid version %s\n"), optarg);
usage(B_FALSE);
}
break;
case 'a':
all = B_TRUE;
break;
case '?':
default:
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
usage(B_FALSE);
}
}
argc -= optind;
argv += optind;
if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
usage(B_FALSE);
if (showversions && (flags & ZFS_ITER_RECURSE || all ||
cb.cb_version || argc))
usage(B_FALSE);
if ((all || argc) && (showversions))
usage(B_FALSE);
if (all && argc)
usage(B_FALSE);
if (showversions) {
/* Show info on available versions. */
(void) printf(gettext("The following filesystem versions are "
"supported:\n\n"));
(void) printf(gettext("VER DESCRIPTION\n"));
(void) printf("--- -----------------------------------------"
"---------------\n");
(void) printf(gettext(" 1 Initial ZFS filesystem version\n"));
(void) printf(gettext(" 2 Enhanced directory entries\n"));
(void) printf(gettext(" 3 Case insensitive and File system "
"unique identifer (FUID)\n"));
(void) printf(gettext("\nFor more information on a particular "
"version, including supported releases, see:\n\n"));
(void) printf("http://www.opensolaris.org/os/community/zfs/"
"version/zpl/N\n\n");
(void) printf(gettext("Where 'N' is the version number.\n"));
ret = 0;
} else if (argc || all) {
/* Upgrade filesystems */
if (cb.cb_version == 0)
cb.cb_version = ZPL_VERSION;
ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
NULL, NULL, upgrade_set_callback, &cb);
(void) printf(gettext("%llu filesystems upgraded\n"),
(u_longlong_t)cb.cb_numupgraded);
if (cb.cb_numsamegraded) {
(void) printf(gettext("%llu filesystems already at "
"this version\n"),
(u_longlong_t)cb.cb_numsamegraded);
}
if (cb.cb_numfailed != 0)
ret = 1;
} else {
/* List old-version filesytems */
boolean_t found;
(void) printf(gettext("This system is currently running "
"ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
flags |= ZFS_ITER_RECURSE;
ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
NULL, NULL, upgrade_list_callback, &cb);
found = cb.cb_foundone;
cb.cb_foundone = B_FALSE;
cb.cb_newer = B_TRUE;
ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
NULL, NULL, upgrade_list_callback, &cb);
if (!cb.cb_foundone && !found) {
(void) printf(gettext("All filesystems are "
"formatted with the current version.\n"));
}
}
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 columns 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;
zprop_list_t *cb_proplist;
} list_cbdata_t;
/*
* Given a list of columns to display, output appropriate headers for each one.
*/
static void
print_header(zprop_list_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 != ZPROP_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", (int)pl->pl_width, header);
else
(void) printf("%-*s", (int)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, zprop_list_t *pl, boolean_t 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 != ZPROP_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,
ZPROP_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 scripted = B_FALSE;
static char default_fields[] =
"name,used,available,referenced,mountpoint";
int types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
boolean_t types_specified = B_FALSE;
char *fields = NULL;
list_cbdata_t cb = { 0 };
char *value;
int ret;
zfs_sort_column_t *sortcol = NULL;
int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
/* check options */
while ((c = getopt(argc, argv, ":o:rt:Hs:S:")) != -1) {
switch (c) {
case 'o':
fields = optarg;
break;
case 'r':
flags |= ZFS_ITER_RECURSE;
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;
types_specified = B_TRUE;
flags &= ~ZFS_ITER_PROP_LISTSNAPS;
while (*optarg != '\0') {
static char *type_subopts[] = { "filesystem",
"volume", "snapshot", "all", NULL };
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;
case 3:
types = ZFS_TYPE_DATASET;
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 = default_fields;
/*
* If "-o space" and no types were specified, don't display snapshots.
*/
if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
types &= ~ZFS_TYPE_SNAPSHOT;
/*
* If the user specifies '-o all', the zprop_get_list() doesn't
* normally include the name of the dataset. For 'zfs list', we always
* want this property to be first.
*/
if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
!= 0)
usage(B_FALSE);
cb.cb_scripted = scripted;
cb.cb_first = B_TRUE;
ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
list_callback, &cb);
zprop_free_list(cb.cb_proplist);
zfs_free_sort_columns(sortcol);
if (ret == 0 && cb.cb_first && !cb.cb_scripted)
(void) printf(gettext("no datasets available\n"));
return (ret);
}
/*
* zfs rename <fs | snap | vol> <fs | snap | vol>
* zfs rename -p <fs | vol> <fs | vol>
* zfs rename -r <snap> <snap>
*
* Renames the given dataset to another of the same type.
*
* The '-p' flag creates all the non-existing ancestors of the target first.
*/
/* ARGSUSED */
static int
zfs_do_rename(int argc, char **argv)
{
zfs_handle_t *zhp;
int c;
int ret;
boolean_t recurse = B_FALSE;
boolean_t parents = B_FALSE;
/* check options */
while ((c = getopt(argc, argv, "pr")) != -1) {
switch (c) {
case 'p':
parents = B_TRUE;
break;
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 source dataset "
"argument\n"));
usage(B_FALSE);
}
if (argc < 2) {
(void) fprintf(stderr, gettext("missing target dataset "
"argument\n"));
usage(B_FALSE);
}
if (argc > 2) {
(void) fprintf(stderr, gettext("too many arguments\n"));
usage(B_FALSE);
}
if (recurse && parents) {
(void) fprintf(stderr, gettext("-p and -r options are mutually "
"exclusive\n"));
usage(B_FALSE);
}
if (recurse && strchr(argv[0], '@') == 0) {
(void) fprintf(stderr, gettext("source dataset for recursive "
"rename must be a snapshot\n"));
usage(B_FALSE);
}
if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
return (1);
/* If we were asked and the name looks good, try to create ancestors. */
if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
zfs_create_ancestors(g_zfs, argv[1]) != 0) {
zfs_close(zhp);
return (1);
}
ret = (zfs_rename(zhp, argv[1], recurse) != 0);
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);
zfs_close(zhp);
return (ret);
}
/*
* zfs rollback [-rRf] <snapshot>
*
* -r Delete any intervening snapshots before doing rollback
* -R Delete any snapshots and their clones
* -f ignored for backwards compatability
*
* 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;
boolean_t force = B_FALSE;
rollback_cbdata_t cb = { 0 };
zfs_handle_t *zhp, *snap;
char parentname[ZFS_MAXNAMELEN];
char *delim;
/* check options */
while ((c = getopt(argc, argv, "rRf")) != -1) {
switch (c) {
case 'r':
cb.cb_recurse = 1;
break;
case 'R':
cb.cb_recurse = 1;
cb.cb_doclones = 1;
break;
case 'f':
force = 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 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_DATASET)) == 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);
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;
} 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);
}
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) ||
(cb.cb_value[1] == '\0')) {
(void) fprintf(stderr, gettext("missing value in "
"property=value argument\n"));
usage(B_FALSE);
}
*cb.cb_value = '\0';
cb.cb_value++;
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, 0,
ZFS_TYPE_DATASET, NULL, NULL, set_callback, &cb);
return (ret);
}
/*
* zfs snapshot [-r] [-o prop=value] ... <fs@snap>
*
* Creates a snapshot with the given name. While functionally equivalent to
* 'zfs create', it is a separate command to differentiate intent.
*/
static int
zfs_do_snapshot(int argc, char **argv)
{
boolean_t recursive = B_FALSE;
int ret;
char c;
nvlist_t *props;
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, "ro:")) != -1) {
switch (c) {
case 'o':
if (parseprop(props))
return (1);
break;
case 'r':
recursive = B_TRUE;
break;
case '?':
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
goto usage;
}
}
argc -= optind;
argv += optind;
/* check number of arguments */
if (argc < 1) {
(void) fprintf(stderr, gettext("missing snapshot argument\n"));
goto usage;
}
if (argc > 1) {
(void) fprintf(stderr, gettext("too many arguments\n"));
goto usage;
}
ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
nvlist_free(props);
if (ret && recursive)
(void) fprintf(stderr, gettext("no snapshots were created\n"));
return (ret != 0);
usage:
nvlist_free(props);
usage(B_FALSE);
return (-1);
}
/*
* zfs send [-v] -R [-i|-I <@snap>] <fs@snap>
* zfs send [-v] [-i|-I <@snap>] <fs@snap>
*
* Send a backup stream to stdout.
*/
static int
zfs_do_send(int argc, char **argv)
{
char *fromname = NULL;
char *toname = NULL;
char *cp;
zfs_handle_t *zhp;
boolean_t doall = B_FALSE;
boolean_t replicate = B_FALSE;
boolean_t fromorigin = B_FALSE;
boolean_t verbose = B_FALSE;
int c, err;
/* check options */
while ((c = getopt(argc, argv, ":i:I:Rv")) != -1) {
switch (c) {
case 'i':
if (fromname)
usage(B_FALSE);
fromname = optarg;
break;
case 'I':
if (fromname)
usage(B_FALSE);
fromname = optarg;
doall = B_TRUE;
break;
case 'R':
replicate = B_TRUE;
break;
case 'v':
verbose = 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(STDOUT_FILENO)) {
(void) fprintf(stderr,
gettext("Error: Stream can not be written to a terminal.\n"
"You must redirect standard output.\n"));
return (1);
}
cp = strchr(argv[0], '@');
if (cp == NULL) {
(void) fprintf(stderr,
gettext("argument must be a snapshot\n"));
usage(B_FALSE);
}
*cp = '\0';
toname = cp + 1;
zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
if (zhp == NULL)
return (1);
/*
* If they specified the full path to the snapshot, chop off
* everything except the short name of the snapshot, but special
* case if they specify the origin.
*/
if (fromname && (cp = strchr(fromname, '@')) != NULL) {
char origin[ZFS_MAXNAMELEN];
zprop_source_t src;
(void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
origin, sizeof (origin), &src, NULL, 0, B_FALSE);
if (strcmp(origin, fromname) == 0) {
fromname = NULL;
fromorigin = B_TRUE;
} else {
*cp = '\0';
if (cp != fromname && strcmp(argv[0], fromname)) {
(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);
}
}
}
if (replicate && fromname == NULL)
doall = B_TRUE;
err = zfs_send(zhp, fromname, toname, replicate, doall, fromorigin,
verbose, STDOUT_FILENO);
zfs_close(zhp);
return (err != 0);
}
/*
* zfs receive [-dnvF] <fs@snap>
*
* Restore a backup stream from stdin.
*/
static int
zfs_do_receive(int argc, char **argv)
{
int c, err;
recvflags_t flags;
bzero(&flags, sizeof (recvflags_t));
/* check options */
while ((c = getopt(argc, argv, ":dnvF")) != -1) {
switch (c) {
case 'd':
flags.isprefix = B_TRUE;
break;
case 'n':
flags.dryrun = B_TRUE;
break;
case 'v':
flags.verbose = B_TRUE;
break;
case 'F':
flags.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], flags, STDIN_FILENO, NULL);
return (err != 0);
}
typedef struct allow_cb {
int a_permcnt;
size_t a_treeoffset;
} allow_cb_t;
static void
zfs_print_perms(avl_tree_t *tree)
{
zfs_perm_node_t *permnode;
permnode = avl_first(tree);
while (permnode != NULL) {
(void) printf("%s", permnode->z_pname);
permnode = AVL_NEXT(tree, permnode);
if (permnode)
(void) printf(",");
else
(void) printf("\n");
}
}
/*
* Iterate over user/groups/everyone/... and the call perm_iter
* function to print actual permission when tree has >0 nodes.
*/
static void
zfs_iter_perms(avl_tree_t *tree, const char *banner, allow_cb_t *cb)
{
zfs_allow_node_t *item;
avl_tree_t *ptree;
item = avl_first(tree);
while (item) {
ptree = (void *)((char *)item + cb->a_treeoffset);
if (avl_numnodes(ptree)) {
if (cb->a_permcnt++ == 0)
(void) printf("%s\n", banner);
(void) printf("\t%s", item->z_key);
/*
* Avoid an extra space being printed
* for "everyone" which is keyed with a null
* string
*/
if (item->z_key[0] != '\0')
(void) printf(" ");
zfs_print_perms(ptree);
}
item = AVL_NEXT(tree, item);
}
}
#define LINES "-------------------------------------------------------------\n"
static int
zfs_print_allows(char *ds)
{
zfs_allow_t *curperms, *perms;
zfs_handle_t *zhp;
allow_cb_t allowcb = { 0 };
char banner[MAXPATHLEN];
if (ds[0] == '-')
usage(B_FALSE);
if (strrchr(ds, '@')) {
(void) fprintf(stderr, gettext("Snapshots don't have 'allow'"
" permissions\n"));
return (1);
}
if ((zhp = zfs_open(g_zfs, ds, ZFS_TYPE_DATASET)) == NULL)
return (1);
if (zfs_perm_get(zhp, &perms)) {
(void) fprintf(stderr,
gettext("Failed to retrieve 'allows' on %s\n"), ds);
zfs_close(zhp);
return (1);
}
zfs_close(zhp);
if (perms != NULL)
(void) printf("%s", LINES);
for (curperms = perms; curperms; curperms = curperms->z_next) {
(void) snprintf(banner, sizeof (banner),
"Permission sets on (%s)", curperms->z_setpoint);
allowcb.a_treeoffset =
offsetof(zfs_allow_node_t, z_localdescend);
allowcb.a_permcnt = 0;
zfs_iter_perms(&curperms->z_sets, banner, &allowcb);
(void) snprintf(banner, sizeof (banner),
"Create time permissions on (%s)", curperms->z_setpoint);
allowcb.a_treeoffset =
offsetof(zfs_allow_node_t, z_localdescend);
allowcb.a_permcnt = 0;
zfs_iter_perms(&curperms->z_crperms, banner, &allowcb);
(void) snprintf(banner, sizeof (banner),
"Local permissions on (%s)", curperms->z_setpoint);
allowcb.a_treeoffset = offsetof(zfs_allow_node_t, z_local);
allowcb.a_permcnt = 0;
zfs_iter_perms(&curperms->z_user, banner, &allowcb);
zfs_iter_perms(&curperms->z_group, banner, &allowcb);
zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
(void) snprintf(banner, sizeof (banner),
"Descendent permissions on (%s)", curperms->z_setpoint);
allowcb.a_treeoffset = offsetof(zfs_allow_node_t, z_descend);
allowcb.a_permcnt = 0;
zfs_iter_perms(&curperms->z_user, banner, &allowcb);
zfs_iter_perms(&curperms->z_group, banner, &allowcb);
zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
(void) snprintf(banner, sizeof (banner),
"Local+Descendent permissions on (%s)",
curperms->z_setpoint);
allowcb.a_treeoffset =
offsetof(zfs_allow_node_t, z_localdescend);
allowcb.a_permcnt = 0;
zfs_iter_perms(&curperms->z_user, banner, &allowcb);
zfs_iter_perms(&curperms->z_group, banner, &allowcb);
zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
(void) printf("%s", LINES);
}
zfs_free_allows(perms);
return (0);
}
#define ALLOWOPTIONS "ldcsu:g:e"
#define UNALLOWOPTIONS "ldcsu:g:er"
/*
* Validate options, and build necessary datastructure to display/remove/add
* permissions.
* Returns 0 - If permissions should be added/removed
* Returns 1 - If permissions should be displayed.
* Returns -1 - on failure
*/
int
parse_allow_args(int *argc, char **argv[], boolean_t unallow,
char **ds, int *recurse, nvlist_t **zperms)
{
int c;
char *options = unallow ? UNALLOWOPTIONS : ALLOWOPTIONS;
zfs_deleg_inherit_t deleg_type = ZFS_DELEG_NONE;
zfs_deleg_who_type_t who_type = ZFS_DELEG_WHO_UNKNOWN;
char *who = NULL;
char *perms = NULL;
zfs_handle_t *zhp;
while ((c = getopt(*argc, *argv, options)) != -1) {
switch (c) {
case 'l':
if (who_type == ZFS_DELEG_CREATE ||
who_type == ZFS_DELEG_NAMED_SET)
usage(B_FALSE);
deleg_type |= ZFS_DELEG_PERM_LOCAL;
break;
case 'd':
if (who_type == ZFS_DELEG_CREATE ||
who_type == ZFS_DELEG_NAMED_SET)
usage(B_FALSE);
deleg_type |= ZFS_DELEG_PERM_DESCENDENT;
break;
case 'r':
*recurse = B_TRUE;
break;
case 'c':
if (who_type != ZFS_DELEG_WHO_UNKNOWN)
usage(B_FALSE);
if (deleg_type)
usage(B_FALSE);
who_type = ZFS_DELEG_CREATE;
break;
case 's':
if (who_type != ZFS_DELEG_WHO_UNKNOWN)
usage(B_FALSE);
if (deleg_type)
usage(B_FALSE);
who_type = ZFS_DELEG_NAMED_SET;
break;
case 'u':
if (who_type != ZFS_DELEG_WHO_UNKNOWN)
usage(B_FALSE);
who_type = ZFS_DELEG_USER;
who = optarg;
break;
case 'g':
if (who_type != ZFS_DELEG_WHO_UNKNOWN)
usage(B_FALSE);
who_type = ZFS_DELEG_GROUP;
who = optarg;
break;
case 'e':
if (who_type != ZFS_DELEG_WHO_UNKNOWN)
usage(B_FALSE);
who_type = ZFS_DELEG_EVERYONE;
break;
default:
usage(B_FALSE);
break;
}
}
if (deleg_type == 0)
deleg_type = ZFS_DELEG_PERM_LOCALDESCENDENT;
*argc -= optind;
*argv += optind;
if (unallow == B_FALSE && *argc == 1) {
/*
* Only print permissions if no options were processed
*/
if (optind == 1)
return (1);
else
usage(B_FALSE);
}
/*
* initialize variables for zfs_build_perms based on number
* of arguments.
* 3 arguments ==> zfs [un]allow joe perm,perm,perm <dataset> or
* zfs [un]allow -s @set1 perm,perm <dataset>
* 2 arguments ==> zfs [un]allow -c perm,perm <dataset> or
* zfs [un]allow -u|-g <name> perm <dataset> or
* zfs [un]allow -e perm,perm <dataset>
* zfs unallow joe <dataset>
* zfs unallow -s @set1 <dataset>
* 1 argument ==> zfs [un]allow -e <dataset> or
* zfs [un]allow -c <dataset>
*/
switch (*argc) {
case 3:
perms = (*argv)[1];
who = (*argv)[0];
*ds = (*argv)[2];
/*
* advance argc/argv for do_allow cases.
* for do_allow case make sure who have a know who type
* and its not a permission set.
*/
if (unallow == B_TRUE) {
*argc -= 2;
*argv += 2;
} else if (who_type != ZFS_DELEG_WHO_UNKNOWN &&
who_type != ZFS_DELEG_NAMED_SET)
usage(B_FALSE);
break;
case 2:
if (unallow == B_TRUE && (who_type == ZFS_DELEG_EVERYONE ||
who_type == ZFS_DELEG_CREATE || who != NULL)) {
perms = (*argv)[0];
*ds = (*argv)[1];
} else {
if (unallow == B_FALSE &&
(who_type == ZFS_DELEG_WHO_UNKNOWN ||
who_type == ZFS_DELEG_NAMED_SET))
usage(B_FALSE);
else if (who_type == ZFS_DELEG_WHO_UNKNOWN ||
who_type == ZFS_DELEG_NAMED_SET)
who = (*argv)[0];
else if (who_type != ZFS_DELEG_NAMED_SET)
perms = (*argv)[0];
*ds = (*argv)[1];
}
if (unallow == B_TRUE) {
(*argc)--;
(*argv)++;
}
break;
case 1:
if (unallow == B_FALSE)
usage(B_FALSE);
if (who == NULL && who_type != ZFS_DELEG_CREATE &&
who_type != ZFS_DELEG_EVERYONE)
usage(B_FALSE);
*ds = (*argv)[0];
break;
default:
usage(B_FALSE);
}
if (strrchr(*ds, '@')) {
(void) fprintf(stderr,
gettext("Can't set or remove 'allow' permissions "
"on snapshots.\n"));
return (-1);
}
if ((zhp = zfs_open(g_zfs, *ds, ZFS_TYPE_DATASET)) == NULL)
return (-1);
if ((zfs_build_perms(zhp, who, perms,
who_type, deleg_type, zperms)) != 0) {
zfs_close(zhp);
return (-1);
}
zfs_close(zhp);
return (0);
}
static int
zfs_do_allow(int argc, char **argv)
{
char *ds;
nvlist_t *zperms = NULL;
zfs_handle_t *zhp;
int unused;
int ret;
if ((ret = parse_allow_args(&argc, &argv, B_FALSE, &ds,
&unused, &zperms)) == -1)
return (1);
if (ret == 1)
return (zfs_print_allows(argv[0]));
if ((zhp = zfs_open(g_zfs, ds, ZFS_TYPE_DATASET)) == NULL)
return (1);
if (zfs_perm_set(zhp, zperms)) {
zfs_close(zhp);
nvlist_free(zperms);
return (1);
}
nvlist_free(zperms);
zfs_close(zhp);
return (0);
}
static int
unallow_callback(zfs_handle_t *zhp, void *data)
{
nvlist_t *nvp = (nvlist_t *)data;
int error;
error = zfs_perm_remove(zhp, nvp);
if (error) {
(void) fprintf(stderr, gettext("Failed to remove permissions "
"on %s\n"), zfs_get_name(zhp));
}
return (error);
}
static int
zfs_do_unallow(int argc, char **argv)
{
int recurse = B_FALSE;
char *ds;
int error;
nvlist_t *zperms = NULL;
int flags = 0;
if (parse_allow_args(&argc, &argv, B_TRUE,
&ds, &recurse, &zperms) == -1)
return (1);
if (recurse)
flags |= ZFS_ITER_RECURSE;
error = zfs_for_each(argc, argv, flags,
ZFS_TYPE_FILESYSTEM|ZFS_TYPE_VOLUME, NULL,
NULL, unallow_callback, (void *)zperms);
if (zperms)
nvlist_free(zperms);
return (error);
}
typedef struct get_all_cbdata {
zfs_handle_t **cb_handles;
size_t cb_alloc;
size_t cb_used;
uint_t cb_types;
boolean_t cb_verbose;
} get_all_cbdata_t;
#define CHECK_SPINNER 30
#define SPINNER_TIME 3 /* seconds */
#define MOUNT_TIME 5 /* seconds */
static int
get_one_dataset(zfs_handle_t *zhp, void *data)
{
static char spin[] = { '-', '\\', '|', '/' };
static int spinval = 0;
static int spincheck = 0;
static time_t last_spin_time = (time_t)0;
get_all_cbdata_t *cbp = data;
zfs_type_t type = zfs_get_type(zhp);
if (cbp->cb_verbose) {
if (--spincheck < 0) {
time_t now = time(NULL);
if (last_spin_time + SPINNER_TIME < now) {
(void) printf("\b%c", spin[spinval++ % 4]);
(void) fflush(stdout);
last_spin_time = now;
}
spincheck = CHECK_SPINNER;
}
}
/*
* 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,
boolean_t verbose)
{
get_all_cbdata_t cb = { 0 };
cb.cb_types = types;
cb.cb_verbose = verbose;
if (verbose) {
(void) printf("%s: *", gettext("Reading ZFS config"));
(void) fflush(stdout);
}
(void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
*dslist = cb.cb_handles;
*count = cb.cb_used;
if (verbose) {
(void) printf("\b%s\n", gettext("done."));
}
}
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)));
}
#if HAVE_ZPL
/*
* 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, char *protocol,
boolean_t explicit, const char *options)
{
char mountpoint[ZFS_MAXPROPLEN];
char shareopts[ZFS_MAXPROPLEN];
char smbshareopts[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);
boolean_t shared_nfs, shared_smb;
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);
verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
strcmp(smbshareopts, "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(1M) to "
"%s this filesystem\n"), cmdname, 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);
}
/*
* canmount explicit outcome
* on no pass through
* on yes pass through
* off no return 0
* off yes display error, return 1
* noauto no return 0
* noauto yes pass through
*/
if (canmount == ZFS_CANMOUNT_OFF) {
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);
} else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
return (0);
}
/*
* 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:
shared_nfs = zfs_is_shared_nfs(zhp, NULL);
shared_smb = zfs_is_shared_smb(zhp, NULL);
if (shared_nfs && shared_smb ||
(shared_nfs && strcmp(shareopts, "on") == 0 &&
strcmp(smbshareopts, "off") == 0) ||
(shared_smb && strcmp(smbshareopts, "on") == 0 &&
strcmp(shareopts, "off") == 0)) {
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 (protocol == NULL) {
if (zfs_shareall(zhp) != 0)
return (1);
} else if (strcmp(protocol, "nfs") == 0) {
if (zfs_share_nfs(zhp))
return (1);
} else if (strcmp(protocol, "smb") == 0) {
if (zfs_share_smb(zhp))
return (1);
} else {
(void) fprintf(stderr, gettext("cannot share "
"'%s': invalid share type '%s' "
"specified\n"),
zfs_get_name(zhp), protocol);
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);
}
#endif /* HAVE_ZPL */
/*
* Reports progress in the form "(current/total)". Not thread-safe.
*/
static void
report_mount_progress(int current, int total)
{
static int len;
static char *reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
static time_t last_progress_time;
time_t now = time(NULL);
/* report 1..n instead of 0..n-1 */
++current;
/* display header if we're here for the first time */
if (current == 1) {
(void) printf(gettext("Mounting ZFS filesystems: "));
len = 0;
} else if (current != total && last_progress_time + MOUNT_TIME >= now) {
/* too soon to report again */
return;
}
last_progress_time = now;
/* back up to prepare for overwriting */
if (len)
(void) printf("%*.*s", len, len, reverse);
/* We put a newline at the end if this is the last one. */
len = printf("(%d/%d)%s", current, total, current == total ? "\n" : "");
(void) fflush(stdout);
}
static void
append_options(char *mntopts, char *newopts)
{
int len = strlen(mntopts);
/* original length plus new string to append plus 1 for the comma */
if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
(void) fprintf(stderr, gettext("the opts argument for "
"'%s' option is too long (more than %d chars)\n"),
"-o", MNT_LINE_MAX);
usage(B_FALSE);
}
if (*mntopts)
mntopts[len++] = ',';
(void) strcpy(&mntopts[len], newopts);
}
#ifdef HAVE_ZPL
static int
share_mount(int op, int argc, char **argv)
{
int do_all = 0;
boolean_t verbose = B_FALSE;
int c, ret = 0;
char *options = NULL;
int types, flags = 0;
/* check options */
while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
!= -1) {
switch (c) {
case 'a':
do_all = 1;
break;
case 'v':
verbose = B_TRUE;
break;
case 'o':
if (*optarg == '\0') {
(void) fprintf(stderr, gettext("empty mount "
"options (-o) specified\n"));
usage(B_FALSE);
}
if (options == NULL)
options = safe_malloc(MNT_LINE_MAX + 1);
/* option validation is done later */
append_options(options, optarg);
break;
case 'O':
flags |= MS_OVERLAY;
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;
char *protocol = NULL;
if (op == OP_MOUNT) {
types = ZFS_TYPE_FILESYSTEM;
} else if (argc > 0) {
if (strcmp(argv[0], "nfs") == 0 ||
strcmp(argv[0], "smb") == 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', 'smb' or 'iscsi'\n"));
usage(B_FALSE);
}
protocol = argv[0];
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, verbose);
if (count == 0)
return (0);
qsort(dslist, count, sizeof (void *), dataset_cmp);
for (i = 0; i < count; i++) {
if (verbose)
report_mount_progress(i, count);
if (share_mount_one(dslist[i], op, flags, protocol,
B_FALSE, options) != 0)
ret = 1;
zfs_close(dslist[i]);
}
free(dslist);
} else if (argc == 0) {
struct mnttab entry;
if ((op == OP_SHARE) || (options != NULL)) {
(void) fprintf(stderr, gettext("missing filesystem "
"argument (specify -a for all)\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.
*/
rewind(mnttab_file);
while (getmntent(mnttab_file, &entry) == 0) {
if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
strchr(entry.mnt_special, '@') != NULL)
continue;
(void) printf("%-30s %s\n", entry.mnt_special,
entry.mnt_mountp);
}
} 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, NULL, B_TRUE,
options);
zfs_close(zhp);
}
}
return (ret);
}
#endif /* HAVE_ZPL */
/*
* 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)
{
#ifdef HAVE_ZPL
return (share_mount(OP_MOUNT, argc, argv));
#else
return ENOSYS;
#endif /* HAVE_ZPL */
}
/*
* zfs share -a [nfs | iscsi | smb]
* zfs share filesystem
*
* Share all filesystems, or share the given filesystem.
*/
static int
zfs_do_share(int argc, char **argv)
{
#ifdef HAVE_ZPL
return (share_mount(OP_SHARE, argc, argv));
#else
return ENOSYS;
#endif /* HAVE_ZPL */
}
#ifdef HAVE_ZPL
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 stat64 statbuf;
struct extmnttab entry;
const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
ino_t path_inode;
/*
* Search for the path in /etc/mnttab. Rather than looking for the
* specific path, which can be fooled by non-standard paths (i.e. ".."
* or "//"), we stat() the path and search for the corresponding
* (major,minor) device pair.
*/
if (stat64(path, &statbuf) != 0) {
(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
cmdname, path, strerror(errno));
return (1);
}
path_inode = statbuf.st_ino;
/*
* Search for the given (major,minor) pair in the mount table.
*/
rewind(mnttab_file);
while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
if (entry.mnt_major == major(statbuf.st_dev) &&
entry.mnt_minor == minor(statbuf.st_dev))
break;
}
if (ret != 0) {
if (op == OP_SHARE) {
(void) fprintf(stderr, gettext("cannot %s '%s': not "
"currently mounted\n"), cmdname, path);
return (1);
}
(void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
path);
if ((ret = umount2(path, flags)) != 0)
(void) fprintf(stderr, gettext("%s: %s\n"), path,
strerror(errno));
return (ret != 0);
}
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);
ret = 1;
if (stat64(entry.mnt_mountp, &statbuf) != 0) {
(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
cmdname, path, strerror(errno));
goto out;
} else if (statbuf.st_ino != path_inode) {
(void) fprintf(stderr, gettext("cannot "
"%s '%s': not a mountpoint\n"), cmdname, path);
goto out;
}
if (op == OP_SHARE) {
char nfs_mnt_prop[ZFS_MAXPROPLEN];
char smbshare_prop[ZFS_MAXPROPLEN];
verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
if (strcmp(nfs_mnt_prop, "off") == 0 &&
strcmp(smbshare_prop, "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"));
} else if (!zfs_is_shared(zhp)) {
(void) fprintf(stderr, gettext("cannot unshare '%s': "
"not currently shared\n"), path);
} else {
ret = zfs_unshareall_bypath(zhp, path);
}
} else {
char mtpt_prop[ZFS_MAXPROPLEN];
verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
if (is_manual) {
ret = zfs_unmount(zhp, NULL, flags);
} else if (strcmp(mtpt_prop, "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"));
} else {
ret = zfs_unmountall(zhp, flags);
}
}
out:
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 nfsiscsi_mnt_prop[ZFS_MAXPROPLEN];
char sharesmb[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.
*/
struct mnttab entry;
uu_avl_pool_t *pool;
uu_avl_t *tree;
unshare_unmount_node_t *node;
uu_avl_index_t idx;
uu_avl_walk_t *walk;
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);
}
rewind(mnttab_file);
while (getmntent(mnttab_file, &entry) == 0) {
/* ignore non-ZFS entries */
if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
continue;
/* ignore snapshots */
if (strchr(entry.mnt_special, '@') != NULL)
continue;
if ((zhp = zfs_open(g_zfs, entry.mnt_special,
ZFS_TYPE_FILESYSTEM)) == NULL) {
ret = 1;
continue;
}
switch (op) {
case OP_SHARE:
verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
nfsiscsi_mnt_prop,
sizeof (nfsiscsi_mnt_prop),
NULL, NULL, 0, B_FALSE) == 0);
if (strcmp(nfsiscsi_mnt_prop, "off") != 0)
break;
verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
nfsiscsi_mnt_prop,
sizeof (nfsiscsi_mnt_prop),
NULL, NULL, 0, B_FALSE) == 0);
if (strcmp(nfsiscsi_mnt_prop, "off") == 0)
continue;
break;
case OP_MOUNT:
/* Ignore legacy mounts */
verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
nfsiscsi_mnt_prop,
sizeof (nfsiscsi_mnt_prop),
NULL, NULL, 0, B_FALSE) == 0);
if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0)
continue;
/* Ignore canmount=noauto mounts */
if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
ZFS_CANMOUNT_NOAUTO)
continue;
default:
break;
}
node = safe_malloc(sizeof (unshare_unmount_node_t));
node->un_zhp = zhp;
if ((node->un_mountp = strdup(entry.mnt_mountp)) ==
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_unshareall_bypath(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,
B_FALSE);
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,
nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop), NULL,
NULL, 0, B_FALSE) == 0);
switch (op) {
case OP_SHARE:
verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
nfsiscsi_mnt_prop,
sizeof (nfsiscsi_mnt_prop),
NULL, NULL, 0, B_FALSE) == 0);
verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
sharesmb, sizeof (sharesmb), NULL, NULL,
0, B_FALSE) == 0);
if (strcmp(nfsiscsi_mnt_prop, "off") == 0 &&
strcmp(sharesmb, "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(zhp)) {
(void) fprintf(stderr, gettext("cannot "
"unshare '%s': not currently "
"shared\n"), zfs_get_name(zhp));
ret = 1;
} else if (zfs_unshareall(zhp) != 0) {
ret = 1;
}
break;
case OP_MOUNT:
if (strcmp(nfsiscsi_mnt_prop, "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,
nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop),
NULL, NULL, 0, B_FALSE) == 0);
if (strcmp(nfsiscsi_mnt_prop, "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);
}
#endif /* HAVE_ZPL */
/*
* zfs unmount -a
* zfs unmount filesystem
*
* Unmount all filesystems, or a specific ZFS filesystem.
*/
static int
zfs_do_unmount(int argc, char **argv)
{
#ifdef HAVE_ZPL
return (unshare_unmount(OP_MOUNT, argc, argv));
#else
return ENOSYS;
#endif /* HAVE_ZPL */
}
/*
* zfs unshare -a
* zfs unshare filesystem
*
* Unshare all filesystems, or a specific ZFS filesystem.
*/
static int
zfs_do_unshare(int argc, char **argv)
{
#ifdef HAVE_ZPL
return (unshare_unmount(OP_SHARE, argc, argv));
#else
return ENOSYS;
#endif /* HAVE_ZPL */
}
/*
* 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'.
*/
#ifdef HAVE_ZPL
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':
flags |= MS_OVERLAY;
break;
case 'm':
flags |= MS_NOMNTTAB;
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 (mount(dataset, path, MS_OPTIONSTR | 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));
}
#endif /* HAVE_ZPL */
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);
}
static int
find_command_idx(char *command, int *idx)
{
int i;
for (i = 0; i < NCOMMAND; i++) {
if (command_table[i].name == NULL)
continue;
if (strcmp(command, command_table[i].name) == 0) {
*idx = i;
return (0);
}
}
return (1);
}
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);
}
zpool_set_history_str("zfs", argc, argv, history_str);
verify(zpool_stage_history(g_zfs, history_str) == 0);
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);
}
#ifdef HAVE_ZPL
/*
* 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 {
#else
{
#endif /* HAVE_ZPL */
/*
* 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.
*/
if (find_command_idx(cmdname, &i) == 0) {
current_command = &command_table[i];
ret = command_table[i].func(argc - 1, argv + 1);
} else if (strchr(cmdname, '=') != NULL) {
verify(find_command_idx("set", &i) == 0);
current_command = &command_table[i];
ret = command_table[i].func(argc, argv);
} else {
(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);
}
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