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Fix mount helper 

Several issues related to strange mount/umount behavior were reported
and this commit should address most of them.  The original idea was
to put in place a zfs mount helper (mount.zfs).  This helper is used
to enforce 'legacy' mount behavior, and perform any extra mount argument
processing (selinux, zfsutil, etc).  This helper wasn't ready for the
0.6.0-rc1 release but with this change it's functional but needs to
extensively tested.

This change addresses the following open issues.
Closes #101
Closes #107
Closes #113
Closes #115
Closes #119
This commit is contained in:
Brian Behlendorf 2011-03-04 15:14:46 -08:00
parent adf2e8778e
commit d53368f675
11 changed files with 1231 additions and 455 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
cmd/Makefile.am
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@ -1 +1,2 @@
SUBDIRS = zfs zpool zpool_id zpool_layout zdb zinject ztest zpios zvol_id
SUBDIRS = zfs zpool zdb zinject ztest zpios mount_zfs
SUBDIRS += zpool_layout zvol_id zpool_id

3
cmd/Makefile.in
View File

@ -292,7 +292,8 @@ target_vendor = @target_vendor@
top_build_prefix = @top_build_prefix@
top_builddir = @top_builddir@
top_srcdir = @top_srcdir@
SUBDIRS = zfs zpool zpool_id zpool_layout zdb zinject ztest zpios zvol_id
SUBDIRS = zfs zpool zdb zinject ztest zpios mount_zfs zpool_layout \
zvol_id zpool_id
all: all-recursive
.SUFFIXES:

28
cmd/mount_zfs/Makefile.am Normal file
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@ -0,0 +1,28 @@
include $(top_srcdir)/config/Rules.am
DEFAULT_INCLUDES += \
-I$(top_srcdir)/include \
-I$(top_srcdir)/lib/libspl/include
#
# Ignore the prefix for the mount helper. It must be installed in /sbin/
# because this path is hardcoded in the mount(8) for security reasons.
#
sbindir=/sbin
sbin_PROGRAMS = mount.zfs
mount_zfs_SOURCES = \
$(top_srcdir)/cmd/mount_zfs/mount_zfs.c
mount_zfs_LDADD = \
$(top_builddir)/lib/libspl/libspl.la \
$(top_builddir)/lib/libavl/libavl.la \
$(top_builddir)/lib/libefi/libefi.la \
$(top_builddir)/lib/libnvpair/libnvpair.la \
$(top_builddir)/lib/libunicode/libunicode.la \
$(top_builddir)/lib/libuutil/libuutil.la \
$(top_builddir)/lib/libzpool/libzpool.la \
$(top_builddir)/lib/libzfs/libzfs.la
mount_zfs_LDFLAGS = \
-pthread -lm $(ZLIB) -lrt -ldl $(LIBUUID) $(LIBBLKID)

664
cmd/mount_zfs/Makefile.in Normal file
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@ -0,0 +1,664 @@
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470
cmd/mount_zfs/mount_zfs.c Normal file
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@ -0,0 +1,470 @@
/*
* 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 Lawrence Livermore National Security, LLC.
*/
#include <libintl.h>
#include <unistd.h>
#include <sys/file.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <libzfs.h>
#ifdef HAVE_LIBSELINUX
#include <selinux/selinux.h>
#endif /* HAVE_LIBSELINUX */
libzfs_handle_t *g_zfs;
typedef struct option_map {
const char *name;
unsigned long mntmask;
unsigned long zfsmask;
} option_map_t;
static const option_map_t option_map[] = {
/* Canonicalized filesystem independent options from mount(8) */
{ MNTOPT_NOAUTO, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_DEFAULTS, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_NODEVICES, MS_NODEV, ZS_COMMENT },
{ MNTOPT_DIRSYNC, MS_DIRSYNC, ZS_COMMENT },
{ MNTOPT_NOEXEC, MS_NOEXEC, ZS_COMMENT },
{ MNTOPT_GROUP, MS_GROUP, ZS_COMMENT },
{ MNTOPT_NETDEV, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_NOFAIL, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_NOSUID, MS_NOSUID, ZS_COMMENT },
{ MNTOPT_OWNER, MS_OWNER, ZS_COMMENT },
{ MNTOPT_REMOUNT, MS_REMOUNT, ZS_COMMENT },
{ MNTOPT_RO, MS_RDONLY, ZS_COMMENT },
{ MNTOPT_RW, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_SYNC, MS_SYNCHRONOUS, ZS_COMMENT },
{ MNTOPT_USER, MS_USERS, ZS_COMMENT },
{ MNTOPT_USERS, MS_USERS, ZS_COMMENT },
#ifdef MS_NOATIME
{ MNTOPT_NOATIME, MS_NOATIME, ZS_COMMENT },
#endif
#ifdef MS_NODIRATIME
{ MNTOPT_NODIRATIME, MS_NODIRATIME, ZS_COMMENT },
#endif
#ifdef MS_RELATIME
{ MNTOPT_RELATIME, MS_RELATIME, ZS_COMMENT },
#endif
#ifdef MS_STRICTATIME
{ MNTOPT_DFRATIME, MS_STRICTATIME, ZS_COMMENT },
#endif
#ifdef HAVE_SELINUX
{ MNTOPT_CONTEXT, MS_COMMENT, ZS_NOCONTEXT },
{ MNTOPT_NOCONTEXT, MS_COMMENT, ZS_NOCONTEXT },
{ MNTOPT_FSCONTEXT, MS_COMMENT, ZS_NOCONTEXT },
{ MNTOPT_DEFCONTEXT, MS_COMMENT, ZS_NOCONTEXT },
{ MNTOPT_ROOTCONTEXT, MS_COMMENT, ZS_NOCONTEXT },
#endif
#ifdef MS_I_VERSION
{ MNTOPT_IVERSION, MS_I_VERSION, ZS_COMMENT },
#endif
#ifdef MS_MANDLOCK
{ MNTOPT_NBMAND, MS_MANDLOCK, ZS_COMMENT },
#endif
/* Valid options not found in mount(8) */
{ MNTOPT_BIND, MS_BIND, ZS_COMMENT },
#ifdef MS_REC
{ MNTOPT_RBIND, MS_BIND|MS_REC, ZS_COMMENT },
#endif
{ MNTOPT_COMMENT, MS_COMMENT, ZS_COMMENT },
#ifdef MS_NOSUB
{ MNTOPT_NOSUB, MS_NOSUB, ZS_COMMENT },
#endif
#ifdef MS_SILENT
{ MNTOPT_QUIET, MS_SILENT, ZS_COMMENT },
#endif
/* Custom zfs options */
{ MNTOPT_NOXATTR, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_ZFSUTIL, MS_COMMENT, ZS_ZFSUTIL },
{ NULL, 0, 0 } };
/*
* Break the mount option in to a name/value pair. The name is
* validated against the option map and mount flags set accordingly.
*/
static int
parse_option(char *mntopt, unsigned long *mntflags,
unsigned long *zfsflags, int sloppy)
{
const option_map_t *opt;
char *ptr, *name, *value = NULL;
int error = 0;
name = strdup(mntopt);
if (name == NULL)
return (ENOMEM);
for (ptr = name; ptr && *ptr; ptr++) {
if (*ptr == '=') {
*ptr = '\0';
value = ptr+1;
break;
}
}
for (opt = option_map; opt->name != NULL; opt++) {
if (strncmp(name, opt->name, strlen(name)) == 0) {
*mntflags |= opt->mntmask;
*zfsflags |= opt->zfsmask;
/* MS_USERS implies default user options */
if (opt->mntmask & (MS_USERS))
*mntflags |= (MS_NOEXEC|MS_NOSUID|MS_NODEV);
/* MS_OWNER|MS_GROUP imply default owner options */
if (opt->mntmask & (MS_OWNER | MS_GROUP))
*mntflags |= (MS_NOSUID|MS_NODEV);
error = 0;
goto out;
}
}
if (!sloppy)
error = ENOENT;
out:
/* If required further process on the value may be done here */
free(name);
return (error);
}
/*
* Translate the mount option string in to MS_* mount flags for the
* kernel vfs. When sloppy is non-zero unknown options will be ignored
* otherwise they are considered fatal are copied in to badopt.
*/
static int
parse_options(char *mntopts, unsigned long *mntflags,
unsigned long *zfsflags, int sloppy, char *badopt)
{
int error = 0, quote = 0, flag = 0;
char *ptr, *opt, *opts;
opts = strdup(mntopts);
if (opts == NULL)
return (ENOMEM);
*mntflags = 0;
opt = NULL;
/*
* Scan through all mount options which must be comma delimited.
* We must be careful to notice regions which are double quoted
* and skip commas in these regions. Each option is then checked
* to determine if it is a known option.
*/
for (ptr = opts; ptr && !flag; ptr++) {
if (opt == NULL)
opt = ptr;
if (*ptr == '"')
quote = !quote;
if (quote)
continue;
if (*ptr == '\0')
flag = 1;
if ((*ptr == ',') || (*ptr == '\0')) {
*ptr = '\0';
error = parse_option(opt, mntflags, zfsflags, sloppy);
if (error) {
strcpy(badopt, opt);
goto out;
}
opt = NULL;
}
}
out:
free(opts);
return (error);
}
/*
* If a file or directory in your current working directory is named
* 'dataset' then mount(8) will prepend your current working directory
* to dataset. The is no way to prevent this behavior so we simply
* check for it and strip the prepended patch when it is added.
*/
static char *
parse_dataset(char *dataset)
{
char cwd[PATH_MAX];
(void) getcwd(cwd, PATH_MAX);
if (!strncmp(cwd, dataset, strlen(cwd)))
return (dataset + strlen(cwd) + 1);
return (dataset);
}
/*
* Update the mtab_* code to use the libmount library when it is commonly
* available otherwise fallback to legacy mode. The mount(8) utility will
* manage the lock file for us to prevent racing updates to /etc/mtab.
*/
static int
mtab_is_writeable(void)
{
struct stat st;
int error, fd;
error = stat(MNTTAB, &st);
if (error || S_ISLNK(st.st_mode))
return (0);
fd = open(MNTTAB, O_RDWR | O_CREAT, 0644);
if (fd < 0)
return (0);
close(fd);
return (1);
}
static int
mtab_update(char *dataset, char *mntpoint, char *type, char *mntopts)
{
struct mntent mnt;
FILE *fp;
int error;
mnt.mnt_fsname = dataset;
mnt.mnt_dir = mntpoint;
mnt.mnt_type = type;
mnt.mnt_opts = mntopts ? mntopts : "";
mnt.mnt_freq = 0;
mnt.mnt_passno = 0;
fp = setmntent(MNTTAB, "a+");
if (!fp) {
(void) fprintf(stderr, gettext(
"filesystem '%s' was mounted, but %s "
"could not be opened due to error %d\n"),
dataset, MNTTAB, errno);
return (MOUNT_FILEIO);
}
error = addmntent(fp, &mnt);
if (error) {
(void) fprintf(stderr, gettext(
"filesystem '%s' was mounted, but %s "
"could not be updated due to error %d\n"),
dataset, MNTTAB, errno);
return (MOUNT_FILEIO);
}
(void) endmntent(fp);
return (MOUNT_SUCCESS);
}
int
main(int argc, char **argv)
{
zfs_handle_t *zhp;
char legacy[ZFS_MAXPROPLEN];
char mntopts[MNT_LINE_MAX] = { '\0' };
char badopt[MNT_LINE_MAX] = { '\0' };
char *dataset, *mntpoint;
unsigned long mntflags = 0, zfsflags = 0;
int sloppy = 0, fake = 0, verbose = 0, nomtab = 0, zfsutil = 0;
int error, c;
(void) setlocale(LC_ALL, "");
(void) textdomain(TEXT_DOMAIN);
opterr = 0;
/* check options */
while ((c = getopt(argc, argv, "sfnvo:h?")) != -1) {
switch (c) {
case 's':
sloppy = 1;
break;
case 'f':
fake = 1;
break;
case 'n':
nomtab = 1;
break;
case 'v':
verbose++;
break;
case 'o':
(void) strlcpy(mntopts, optarg, sizeof (mntopts));
break;
case 'h':
case '?':
(void) fprintf(stderr, gettext("Invalid option '%c'\n"),
optopt);
(void) fprintf(stderr, gettext("Usage: mount.zfs "
"[-sfnv] [-o options] <dataset> <mountpoint>\n"));
return (MOUNT_USAGE);
}
}
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 (MOUNT_USAGE);
}
dataset = parse_dataset(argv[0]);
mntpoint = argv[1];
/* validate mount options and set mntflags */
error = parse_options(mntopts, &mntflags, &zfsflags, sloppy, badopt);
if (error) {
switch (error) {
case ENOMEM:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to a memory allocation "
"failure\n"), dataset);
return (MOUNT_SYSERR);
case EINVAL:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted of due to the invalid option "
"'%s'\n"), dataset, badopt);
(void) fprintf(stderr, gettext("Use the '-s' option "
"to ignore the bad mount option.\n"));
return (MOUNT_USAGE);
default:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to internal error %d\n"),
dataset, error);
return (MOUNT_SOFTWARE);
}
}
#ifdef HAVE_LIBSELINUX
/*
* Automatically add the default zfs context when selinux is enabled
* and the caller has not specified their own context. This must be
* done until zfs is added to the default selinux policy configuration
* as a known filesystem type which supports xattrs.
*/
if (is_selinux_enabled() && !(zfsflags & ZS_NOCONTEXT))
(void) strlcat(mntopts, ",context=\"system_u:"
"object_r:file_t:s0\"", sizeof (mntopts));
#endif /* HAVE_LIBSELINUX */
if (verbose)
(void) fprintf(stdout, gettext("mount.zfs:\n"
" dataset: \"%s\"\n mountpoint: \"%s\"\n"
" mountflags: 0x%lx\n zfsflags: 0x%lx\n"
" mountopts: \"%s\"\n\n"),
dataset, mntpoint, mntflags, zfsflags, mntopts);
if (mntflags & MS_REMOUNT)
nomtab = 1;
if (zfsflags * ZS_ZFSUTIL)
zfsutil = 1;
if ((g_zfs = libzfs_init()) == NULL)
return (MOUNT_SYSERR);
/* try to open the dataset to access the mount point */
if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL) {
(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
"mounted, unable to open the dataset\n"), dataset);
libzfs_fini(g_zfs);
return (MOUNT_USAGE);
}
(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, legacy,
sizeof (legacy), NULL, NULL, 0, B_FALSE);
zfs_close(zhp);
libzfs_fini(g_zfs);
/*
* Legacy mount points may only be mounted using 'mount', never using
* 'zfs mount'. However, since 'zfs mount' actually invokes 'mount'
* we differentiate the two cases using the 'zfsutil' mount option.
* This mount option should only be supplied by the 'zfs mount' util.
*/
if (zfsutil && !strcmp(legacy, ZFS_MOUNTPOINT_LEGACY)) {
(void) fprintf(stderr, gettext(
"filesystem '%s' cannot be mounted using 'zfs mount'.\n"
"Use 'zfs set mountpoint=%s' or 'mount -t zfs %s %s'.\n"
"See zfs(8) for more information.\n"),
dataset, mntpoint, dataset, mntpoint);
return (MOUNT_USAGE);
}
if (!zfsutil && strcmp(legacy, ZFS_MOUNTPOINT_LEGACY)) {
(void) fprintf(stderr, gettext(
"filesystem '%s' cannot be mounted using 'mount'.\n"
"Use 'zfs set mountpoint=%s' or 'zfs mount %s'.\n"
"See zfs(8) for more information.\n"),
dataset, "legacy", dataset);
return (MOUNT_USAGE);
}
if (!fake) {
error = mount(dataset, mntpoint, MNTTYPE_ZFS,
mntflags, mntopts);
if (error) {
switch (errno) {
case EBUSY:
(void) fprintf(stderr, gettext("filesystem "
"'%s' is already mounted\n"), dataset);
return (MOUNT_SYSERR);
default:
(void) fprintf(stderr, gettext("filesystem "
"'%s' can not be mounted due to error "
"%d\n"), dataset, errno);
return (MOUNT_USAGE);
}
}
}
if (!nomtab && mtab_is_writeable()) {
error = mtab_update(dataset, mntpoint, MNTTYPE_ZFS, mntopts);
if (error)
return (error);
}
return (MOUNT_SUCCESS);
}

484
cmd/zfs/zfs_main.c
View File

@ -3827,371 +3827,6 @@ zfs_do_python(int argc, char **argv)
return (-1);
}
typedef struct option_map {
const char *name;
int mask;
} option_map_t;
static const option_map_t option_map[] = {
/* Canonicalized filesystem independent options from mount(8) */
{ MNTOPT_NOAUTO, MS_COMMENT },
{ MNTOPT_DEFAULTS, MS_COMMENT },
{ MNTOPT_NODEVICES, MS_NODEV },
{ MNTOPT_DIRSYNC, MS_DIRSYNC },
{ MNTOPT_NOEXEC, MS_NOEXEC },
{ MNTOPT_GROUP, MS_GROUP },
{ MNTOPT_NETDEV, MS_COMMENT },
{ MNTOPT_NOFAIL, MS_COMMENT },
{ MNTOPT_NOSUID, MS_NOSUID },
{ MNTOPT_OWNER, MS_OWNER },
{ MNTOPT_REMOUNT, MS_REMOUNT },
{ MNTOPT_RO, MS_RDONLY },
{ MNTOPT_SYNC, MS_SYNCHRONOUS },
{ MNTOPT_USER, MS_USERS },
{ MNTOPT_USERS, MS_USERS },
#ifdef MS_NOATIME
{ MNTOPT_NOATIME, MS_NOATIME },
#endif
#ifdef MS_NODIRATIME
{ MNTOPT_NODIRATIME, MS_NODIRATIME },
#endif
#ifdef MS_RELATIME
{ MNTOPT_RELATIME, MS_RELATIME },
#endif
#ifdef MS_STRICTATIME
{ MNTOPT_DFRATIME, MS_STRICTATIME },
#endif
#ifdef HAVE_SELINUX
{ MNTOPT_CONTEXT, MS_COMMENT },
{ MNTOPT_FSCONTEXT, MS_COMMENT },
{ MNTOPT_DEFCONTEXT, MS_COMMENT },
{ MNTOPT_ROOTCONTEXT, MS_COMMENT },
#endif
#ifdef MS_I_VERSION
{ MNTOPT_IVERSION, MS_I_VERSION },
#endif
#ifdef MS_MANDLOCK
{ MNTOPT_NBMAND, MS_MANDLOCK },
#endif
/* Valid options not found in mount(8) */
{ MNTOPT_BIND, MS_BIND },
#ifdef MS_REC
{ MNTOPT_RBIND, MS_BIND|MS_REC },
#endif
{ MNTOPT_COMMENT, MS_COMMENT },
{ MNTOPT_BOOTWAIT, MS_COMMENT },
{ MNTOPT_NOBOOTWAIT, MS_COMMENT },
{ MNTOPT_OPTIONAL, MS_COMMENT },
{ MNTOPT_SHOWTHROUGH, MS_COMMENT },
#ifdef MS_NOSUB
{ MNTOPT_NOSUB, MS_NOSUB },
#endif
#ifdef MS_SILENT
{ MNTOPT_QUIET, MS_SILENT },
#endif
/* Custom zfs options */
{ MNTOPT_NOXATTR, MS_COMMENT },
{ NULL, 0 } };
/*
* Break the mount option in to a name/value pair. The name is
* validated against the option map and mount flags set accordingly.
*/
static int
parse_option(char *mntopt, unsigned long *mntflags, int sloppy)
{
const option_map_t *opt;
char *ptr, *name, *value = NULL;
int rc = 0;
name = strdup(mntopt);
if (name == NULL)
return (ENOMEM);
for (ptr = name; ptr && *ptr; ptr++) {
if (*ptr == '=') {
*ptr = '\0';
value = ptr+1;
break;
}
}
for (opt = option_map; opt->name != NULL; opt++) {
if (strncmp(name, opt->name, strlen(name)) == 0) {
*mntflags |= opt->mask;
/* MS_USERS implies default user options */
if (opt->mask & (MS_USERS))
*mntflags |= (MS_NOEXEC|MS_NOSUID|MS_NODEV);
/* MS_OWNER|MS_GROUP imply default owner options */
if (opt->mask & (MS_OWNER | MS_GROUP))
*mntflags |= (MS_NOSUID|MS_NODEV);
rc = 0;
goto out;
}
}
if (!sloppy)
rc = ENOENT;
out:
/* If required further process on the value may be done here */
free(name);
return (rc);
}
/*
* Translate the mount option string in to MS_* mount flags for the
* kernel vfs. When sloppy is non-zero unknown options will be ignored
* otherwise they are considered fatal are copied in to badopt.
*/
static int
parse_options(char *mntopts, unsigned long *mntflags, int sloppy, char *badopt)
{
int rc = 0, quote = 0;
char *ptr, *opt, *opts;
opts = strdup(mntopts);
if (opts == NULL)
return (ENOMEM);
*mntflags = 0;
opt = NULL;
/*
* Scan through all mount options which must be comma delimited.
* We must be careful to notice regions which are double quoted
* and skip commas in these regions. Each option is then checked
* to determine if it is a known option.
*/
for (ptr = opts; ptr && *ptr; ptr++) {
if (opt == NULL)
opt = ptr;
if (*ptr == '"')
quote = !quote;
if (quote)
continue;
if ((*ptr == ',') || (*ptr == '\0')) {
*ptr = '\0';
rc = parse_option(opt, mntflags, sloppy);
if (rc) {
strcpy(badopt, opt);
goto out;
}
opt = NULL;
}
}
out:
free(opts);
return (rc);
}
/*
* Called when invoked as /sbin/mount.zfs, mount helper for mount(8).
*/
static int
manual_mount(int argc, char **argv)
{
zfs_handle_t *zhp;
char legacy[ZFS_MAXPROPLEN];
char mntopts[MNT_LINE_MAX] = { '\0' };
char badopt[MNT_LINE_MAX] = { '\0' };
char *dataset, *mntpoint;
unsigned long mntflags;
int sloppy = 0, fake = 0, verbose = 0;
int rc, c;
/* check options */
while ((c = getopt(argc, argv, "sfnvo:h?")) != -1) {
switch (c) {
case 's':
sloppy = 1;
break;
case 'f':
fake = 1;
break;
case 'n':
/* Ignored, handled by mount(8) */
break;
case 'v':
verbose++;
break;
case 'o':
(void) strlcpy(mntopts, optarg, sizeof (mntopts));
break;
case 'h':
case '?':
(void) fprintf(stderr, gettext("Invalid option '%c'\n"),
optopt);
(void) fprintf(stderr, gettext("Usage: mount.zfs "
"[-sfnv] [-o options] <dataset> <mountpoint>\n"));
return (MOUNT_USAGE);
}
}
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 (MOUNT_USAGE);
}
dataset = argv[0];
mntpoint = argv[1];
/* try to open the dataset to access the mount point */
if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL) {
(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
"mounted, unable to open the dataset\n"), dataset);
return (MOUNT_USAGE);
}
(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, legacy,
sizeof (legacy), NULL, NULL, 0, B_FALSE);
zfs_close(zhp);
/* check for legacy mountpoint or util mount option */
if ((!strcmp(legacy, ZFS_MOUNTPOINT_LEGACY) == 0) &&
(strstr(mntopts, MNTOPT_ZFSUTIL) == NULL)) {
(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
"mounted using 'mount -a -t zfs'\n"), dataset);
(void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
"instead.\n"), mntpoint);
(void) fprintf(stderr, gettext("If you must use 'mount -a -t "
"zfs' or /etc/fstab, use 'zfs set mountpoint=legacy'.\n"));
(void) fprintf(stderr, gettext("See zfs(8) for more "
"information.\n"));
return (MOUNT_USAGE);
}
/* validate mount options and set mntflags */
rc = parse_options(mntopts, &mntflags, sloppy, badopt);
if (rc) {
switch (rc) {
case ENOMEM:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to a memory allocation "
"failure\n"), dataset);
return (MOUNT_SYSERR);
case EINVAL:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted of due to the invalid option "
"'%s'\n"), dataset, badopt);
(void) fprintf(stderr, gettext("Use the '-s' option "
"to ignore the bad mount option.\n"));
return (MOUNT_USAGE);
default:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to internal error %d\n"),
dataset, rc);
return (MOUNT_SOFTWARE);
}
}
if (verbose > 2)
printf("mount.zfs: dataset: \"%s\", mountpoint: \"%s\" "
"mountflags: 0x%lx, mountopts: \"%s\"\n", dataset,
mntpoint, mntflags, mntopts);
/* load the zfs posix layer module (zpl) */
if (libzfs_load_module("zpl")) {
(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
"mounted without the zpl kernel module\n"), dataset);
(void) fprintf(stderr, gettext("Use 'dmesg' to determine why "
"the module could not be loaded.\n"));
return (MOUNT_SYSERR);
}
if (!fake) {
rc = mount(dataset, mntpoint, MNTTYPE_ZFS, mntflags, mntopts);
if (rc) {
(void) fprintf(stderr, gettext("filesystem '%s' can"
"not be mounted due to error %d\n"), dataset, rc);
return (MOUNT_USAGE);
}
}
return (MOUNT_SUCCESS);
}
#ifdef HAVE_UNMOUNT_HELPER
/*
* Called when invoked as /sbin/umount.zfs, mount helper for mount(8).
* 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 verbose = 0, flags = 0;
int c;
/* check options */
while ((c = getopt(argc, argv, "nlfvrh?")) != -1) {
switch (c) {
case 'n':
/* Ignored, handled by mount(8) */
break;
case 'l':
flags = MS_DETACH;
break;
case 'f':
flags = MS_FORCE;
break;
case 'v':
verbose++;
break;
case 'r':
/* Remount read-only on umount failure, unsupported */
(void) fprintf(stderr, gettext("Unsupported option "
"'%c'\n"), optopt);
return (MOUNT_USAGE);
case 'h':
case '?':
(void) fprintf(stderr, gettext("Invalid option '%c'\n"),
optopt);
(void) fprintf(stderr, gettext("Usage: umount.zfs "
"[-nlfvr] <mountpoint>\n"));
return (MOUNT_USAGE);
}
}
argc -= optind;
argv += optind;
/* check that we only have one argument */
if (argc != 1) {
if (argc == 0)
(void) fprintf(stderr, gettext("missing mountpoint "
"argument\n"));
else
(void) fprintf(stderr, gettext("too many arguments\n"));
(void) fprintf(stderr, gettext("Usage: umount.zfs [-nlfvr] "
"<mountpoint>\n"));
return (MOUNT_USAGE);
}
return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
}
#endif /* HAVE_UNMOUNT_HELPER */
static int
find_command_idx(char *command, int *idx)
{
@ -4289,7 +3924,6 @@ main(int argc, char **argv)
{
int ret;
int i = 0;
char *progname;
char *cmdname;
(void) setlocale(LC_ALL, "");
@ -4304,78 +3938,64 @@ main(int argc, char **argv)
}
/*
* This command also doubles as the /etc/fs mount and unmount program.
* Determine if we should take this behavior based on argv[0].
* Make sure the user has specified some command.
*/
progname = basename(argv[0]);
if (strcmp(progname, "mount.zfs") == 0) {
ret = manual_mount(argc, argv);
#ifdef HAVE_UNMOUNT_HELPER
} else if (strcmp(progname, "umount.zfs") == 0) {
ret = manual_unmount(argc, argv);
#endif /* HAVE_UNMOUNT_HELPER */
} else {
/*
* Make sure the user has specified some command.
*/
if (argc < 2) {
(void) fprintf(stderr, gettext("missing command\n"));
usage(B_FALSE);
}
cmdname = argv[1];
/*
* The 'umount' command is an alias for 'unmount'
*/
if (strcmp(cmdname, "umount") == 0)
cmdname = "unmount";
/*
* The 'recv' command is an alias for 'receive'
*/
if (strcmp(cmdname, "recv") == 0)
cmdname = "receive";
/*
* Special case '-?'
*/
if ((strcmp(cmdname, "-?") == 0) ||
(strcmp(cmdname, "--help") == 0))
usage(B_TRUE);
if ((g_zfs = libzfs_init()) == NULL)
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);
/*
* Run the appropriate command.
*/
libzfs_mnttab_cache(g_zfs, B_TRUE);
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);
ret = 1;
}
libzfs_mnttab_cache(g_zfs, B_FALSE);
if (argc < 2) {
(void) fprintf(stderr, gettext("missing command\n"));
usage(B_FALSE);
}
(void) fclose(mnttab_file);
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) ||
(strcmp(cmdname, "--help") == 0))
usage(B_TRUE);
if ((g_zfs = libzfs_init()) == NULL)
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);
/*
* Run the appropriate command.
*/
libzfs_mnttab_cache(g_zfs, B_TRUE);
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);
ret = 1;
}
libzfs_mnttab_cache(g_zfs, B_FALSE);
libzfs_fini(g_zfs);
(void) fclose(mnttab_file);
/*
* The 'ZFS_ABORT' environment variable causes us to dump core on exit
* for the purposes of running ::findleaks.

7
configure vendored
View File

@ -19911,7 +19911,7 @@ fi
$as_echo "$enable_debug" >&6; }
ac_config_files="$ac_config_files Makefile etc/Makefile man/Makefile man/man8/Makefile lib/Makefile lib/libspl/Makefile lib/libspl/asm-generic/Makefile lib/libspl/asm-i386/Makefile lib/libspl/asm-x86_64/Makefile lib/libspl/include/Makefile lib/libspl/include/ia32/Makefile lib/libspl/include/ia32/sys/Makefile lib/libspl/include/rpc/Makefile lib/libspl/include/sys/Makefile lib/libspl/include/sys/sysevent/Makefile lib/libspl/include/sys/dktp/Makefile lib/libspl/include/util/Makefile lib/libavl/Makefile lib/libefi/Makefile lib/libnvpair/Makefile lib/libunicode/Makefile lib/libuutil/Makefile lib/libzpool/Makefile lib/libzfs/Makefile cmd/Makefile cmd/zdb/Makefile cmd/zfs/Makefile cmd/zinject/Makefile cmd/zpool/Makefile cmd/zpool_id/Makefile cmd/zpool_layout/Makefile cmd/ztest/Makefile cmd/zpios/Makefile cmd/zvol_id/Makefile module/Makefile module/avl/Makefile module/nvpair/Makefile module/unicode/Makefile module/zcommon/Makefile module/zfs/Makefile module/zpios/Makefile include/Makefile include/linux/Makefile include/sys/Makefile include/sys/fs/Makefile include/sys/fm/Makefile include/sys/fm/fs/Makefile scripts/Makefile scripts/zpios-profile/Makefile scripts/zpios-test/Makefile scripts/zpool-config/Makefile scripts/zpool-layout/Makefile scripts/common.sh zfs.spec zfs-modules.spec zfs-script-config.sh"
ac_config_files="$ac_config_files Makefile etc/Makefile man/Makefile man/man8/Makefile lib/Makefile lib/libspl/Makefile lib/libspl/asm-generic/Makefile lib/libspl/asm-i386/Makefile lib/libspl/asm-x86_64/Makefile lib/libspl/include/Makefile lib/libspl/include/ia32/Makefile lib/libspl/include/ia32/sys/Makefile lib/libspl/include/rpc/Makefile lib/libspl/include/sys/Makefile lib/libspl/include/sys/sysevent/Makefile lib/libspl/include/sys/dktp/Makefile lib/libspl/include/util/Makefile lib/libavl/Makefile lib/libefi/Makefile lib/libnvpair/Makefile lib/libunicode/Makefile lib/libuutil/Makefile lib/libzpool/Makefile lib/libzfs/Makefile cmd/Makefile cmd/zdb/Makefile cmd/zfs/Makefile cmd/zinject/Makefile cmd/zpool/Makefile cmd/ztest/Makefile cmd/zpios/Makefile cmd/mount_zfs/Makefile cmd/zpool_layout/Makefile cmd/zvol_id/Makefile cmd/zpool_id/Makefile module/Makefile module/avl/Makefile module/nvpair/Makefile module/unicode/Makefile module/zcommon/Makefile module/zfs/Makefile module/zpios/Makefile include/Makefile include/linux/Makefile include/sys/Makefile include/sys/fs/Makefile include/sys/fm/Makefile include/sys/fm/fs/Makefile scripts/Makefile scripts/zpios-profile/Makefile scripts/zpios-test/Makefile scripts/zpool-config/Makefile scripts/zpool-layout/Makefile scripts/common.sh zfs.spec zfs-modules.spec zfs-script-config.sh"
cat >confcache <<\_ACEOF
@ -20856,11 +20856,12 @@ do
"cmd/zfs/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zfs/Makefile" ;;
"cmd/zinject/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zinject/Makefile" ;;
"cmd/zpool/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zpool/Makefile" ;;
"cmd/zpool_id/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zpool_id/Makefile" ;;
"cmd/zpool_layout/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zpool_layout/Makefile" ;;
"cmd/ztest/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/ztest/Makefile" ;;
"cmd/zpios/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zpios/Makefile" ;;
"cmd/mount_zfs/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/mount_zfs/Makefile" ;;
"cmd/zpool_layout/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zpool_layout/Makefile" ;;
"cmd/zvol_id/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zvol_id/Makefile" ;;
"cmd/zpool_id/Makefile") CONFIG_FILES="$CONFIG_FILES cmd/zpool_id/Makefile" ;;
"module/Makefile") CONFIG_FILES="$CONFIG_FILES module/Makefile" ;;
"module/avl/Makefile") CONFIG_FILES="$CONFIG_FILES module/avl/Makefile" ;;
"module/nvpair/Makefile") CONFIG_FILES="$CONFIG_FILES module/nvpair/Makefile" ;;

5
configure.ac
View File

@ -83,11 +83,12 @@ AC_CONFIG_FILES([
cmd/zfs/Makefile
cmd/zinject/Makefile
cmd/zpool/Makefile
cmd/zpool_id/Makefile
cmd/zpool_layout/Makefile
cmd/ztest/Makefile
cmd/zpios/Makefile
cmd/mount_zfs/Makefile
cmd/zpool_layout/Makefile
cmd/zvol_id/Makefile
cmd/zpool_id/Makefile
module/Makefile
module/avl/Makefile
module/nvpair/Makefile

12
lib/libspl/include/sys/mntent.h
View File

@ -31,9 +31,6 @@
#define MNTTYPE_ZFS "zfs" /* ZFS file system */
#define FSTAB "/etc/fstab"
#define MNTMAXSTR 128
#define MOUNT_SUCCESS 0x00 /* Success */
#define MOUNT_USAGE 0x01 /* Invalid invocation or permissions */
#define MOUNT_SYSERR 0x02 /* System error (ENOMEM, etc) */
@ -49,6 +46,7 @@
#define MNTOPT_AUTO "auto" /* automount */
#define MNTOPT_NOAUTO "noauto" /* do not automount */
#define MNTOPT_CONTEXT "context" /* selinux context */
#define MNTOPT_NOCONTEXT "nocontext" /* No selinux context (zfs-only) */
#define MNTOPT_FSCONTEXT "fscontext" /* selinux fscontext */
#define MNTOPT_DEFCONTEXT "defcontext" /* selinux defcontext */
#define MNTOPT_ROOTCONTEXT "rootcontext" /* selinux rootcontext */
@ -93,10 +91,10 @@
#define MNTOPT_XATTR "user_xattr" /* enable extended attributes */
#define MNTOPT_NOXATTR "nouser_xattr" /* disable extended attributes */
#define MNTOPT_COMMENT "comment" /* comment */
#define MNTOPT_BOOTWAIT "bootwait"
#define MNTOPT_NOBOOTWAIT "nobootwait"
#define MNTOPT_OPTIONAL "optional"
#define MNTOPT_SHOWTHROUGH "showthrough"
#define MNTOPT_ZFSUTIL "zfsutil" /* called by zfs utility */
#define ZS_COMMENT 0x00000000 /* comment */
#define ZS_ZFSUTIL 0x00000001 /* caller is zfs(8) */
#define ZS_NOCONTEXT 0x00000002 /* do not add selinux context */
#endif /* _SYS_MNTENT_H */

9
lib/libzfs/libzfs_mount.c
View File

@ -72,9 +72,6 @@
#include <sys/mntent.h>
#include <sys/mount.h>
#include <sys/stat.h>
#ifdef HAVE_LIBSELINUX
#include <selinux/selinux.h>
#endif /* HAVE_LIBSELINUX */
#include <libzfs.h>
@ -346,12 +343,6 @@ zfs_mount(zfs_handle_t *zhp, const char *options, int flags)
*/
strlcat(mntopts, "," MNTOPT_ZFSUTIL, sizeof (mntopts));
#ifdef HAVE_LIBSELINUX
if (is_selinux_enabled())
(void) strlcat(mntopts, ",context=\"system_u:"
"object_r:file_t:s0\"", sizeof (mntopts));
#endif /* HAVE_LIBSELINUX */
if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
return (0);

1
zfs.spec.in
View File

@ -66,6 +66,7 @@ rm -rf $RPM_BUILD_ROOT
%{_libdir}/*
%{_mandir}/man8/*
/etc/*
/sbin/*
%files devel
%defattr(-,root,root)