*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
*
* zfs_is_shared_nfs()
* zfs_is_shared_smb()
- * zfs_is_shared_iscsi()
* zfs_share_proto()
* zfs_shareall();
- * zfs_share_iscsi()
* zfs_unshare_nfs()
* zfs_unshare_smb()
* zfs_unshareall_nfs()
* zfs_unshareall_smb()
* zfs_unshareall()
* zfs_unshareall_bypath()
- * zfs_unshare_iscsi()
*
* The following functions are available for pool consumers, and will
* mount/unmount and share/unshare all datasets within pool:
#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>
#include <sys/systeminfo.h>
#define MAXISALEN 257 /* based on sysinfo(2) man page */
+#ifdef HAVE_ZPL
static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
zfs_share_proto_t);
-static int (*iscsitgt_zfs_share)(const char *);
-static int (*iscsitgt_zfs_unshare)(const char *);
-static int (*iscsitgt_zfs_is_shared)(const char *);
-static int (*iscsitgt_svc_online)();
-
/*
* The share protocols table must be in the same order as the zfs_share_prot_t
* enum in libzfs_impl.h
PROTO_END
};
-#pragma init(zfs_iscsi_init)
-static void
-zfs_iscsi_init(void)
-{
- void *libiscsitgt;
-
- if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1",
- RTLD_LAZY | RTLD_GLOBAL)) == NULL ||
- (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt,
- "iscsitgt_zfs_share")) == NULL ||
- (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt,
- "iscsitgt_zfs_unshare")) == NULL ||
- (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt,
- "iscsitgt_zfs_is_shared")) == NULL ||
- (iscsitgt_svc_online = (int (*)(const char *))dlsym(libiscsitgt,
- "iscsitgt_svc_online")) == NULL) {
- iscsitgt_zfs_share = NULL;
- iscsitgt_zfs_unshare = NULL;
- iscsitgt_zfs_is_shared = NULL;
- iscsitgt_svc_online = NULL;
- }
-}
-
/*
- * Search the sharetab for the given mountpoint and protocol, returning
+ * Search for NFS and SMB exports for the given mountpoint and protocol, returning
* a zfs_share_type_t value.
*/
static zfs_share_type_t
is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
{
char buf[MAXPATHLEN], *tab;
- char *ptr;
if (hdl->libzfs_sharetab == NULL)
return (SHARED_NOT_SHARED);
(void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET);
+ /* Search /etc/exports for NFS exports */
+ /* FIXME: Assumes the file is tab delimited. */
while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
/* the mountpoint is the first entry on each line */
*tab = '\0';
if (strcmp(buf, mountpoint) == 0) {
- /*
- * the protocol field is the third field
- * skip over second field
- */
- ptr = ++tab;
- if ((tab = strchr(ptr, '\t')) == NULL)
- continue;
- ptr = ++tab;
- if ((tab = strchr(ptr, '\t')) == NULL)
- continue;
- *tab = '\0';
- if (strcmp(ptr,
- proto_table[proto].p_name) == 0) {
- switch (proto) {
- case PROTO_NFS:
- return (SHARED_NFS);
- case PROTO_SMB:
- return (SHARED_SMB);
- default:
- return (0);
- }
- }
+ if (proto == PROTO_NFS)
+ return (SHARED_NFS);
+ else
+ return (SHARED_NOT_SHARED);
}
}
+ /* XXX: Search /etc/samba/smb.conf for SMB exports, return SHARED_SMB */
+
return (SHARED_NOT_SHARED);
}
}
/*
+ * The filesystem is mounted by invoking the system mount utility rather
+ * than by the system call mount(2). This ensures that the /etc/mtab
+ * file is correctly locked for the update. Performing our own locking
+ * and /etc/mtab update requires making an unsafe assumption about how
+ * the mount utility performs its locking. Unfortunately, this also means
+ * in the case of a mount failure we do not have the exact errno. We must
+ * make due with return value from the mount process.
+ *
+ * In the long term a shared library called libmount is under development
+ * which provides a common API to address the locking and errno issues.
+ * Once the standard mount utility has been updated to use this library
+ * we can add an autoconf check to conditionally use it.
+ *
+ * http://www.kernel.org/pub/linux/utils/util-linux/libmount-docs/index.html
+ */
+
+static int
+do_mount(const char *src, const char *mntpt, char *opts)
+{
+ char *argv[8] = {
+ "/bin/mount",
+ "-t", MNTTYPE_ZFS,
+ "-o", opts,
+ (char *)src,
+ (char *)mntpt,
+ (char *)NULL };
+ int rc;
+
+ /* Return only the most critical mount error */
+ rc = libzfs_run_process(argv[0], argv);
+ if (rc) {
+ if (rc & MOUNT_FILEIO)
+ return EIO;
+ if (rc & MOUNT_USER)
+ return EINTR;
+ if (rc & MOUNT_SOFTWARE)
+ return EPIPE;
+ if (rc & MOUNT_SYSERR)
+ return EAGAIN;
+ if (rc & MOUNT_USAGE)
+ return EINVAL;
+
+ return ENXIO; /* Generic error */
+ }
+
+ return 0;
+}
+
+static int
+do_unmount(const char *mntpt, int flags)
+{
+ char force_opt[] = "-f";
+ char lazy_opt[] = "-l";
+ char *argv[7] = {
+ "/bin/umount",
+ "-t", MNTTYPE_ZFS,
+ NULL, NULL, NULL, NULL };
+ int rc, count = 3;
+
+ if (flags & MS_FORCE) {
+ argv[count] = force_opt;
+ count++;
+ }
+
+ if (flags & MS_DETACH) {
+ argv[count] = lazy_opt;
+ count++;
+ }
+
+ argv[count] = (char *)mntpt;
+ rc = libzfs_run_process(argv[0], argv);
+
+ return (rc ? EINVAL : 0);
+}
+
+/*
* Mount the given filesystem.
*/
int
char mountpoint[ZFS_MAXPROPLEN];
char mntopts[MNT_LINE_MAX];
libzfs_handle_t *hdl = zhp->zfs_hdl;
+ int rc;
if (options == NULL)
- mntopts[0] = '\0';
+ (void) strlcpy(mntopts, MNTOPT_DEFAULTS, sizeof (mntopts));
else
(void) strlcpy(mntopts, options, sizeof (mntopts));
+ /*
+ * If the pool is imported read-only then all mounts must be read-only
+ */
+ if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL))
+ (void) strlcat(mntopts, "," MNTOPT_RO, sizeof (mntopts));
+
+ /*
+ * Append zfsutil option so the mount helper allow the mount
+ */
+ 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);
/*
* Determine if the mountpoint is empty. If so, refuse to perform the
- * mount. We don't perform this check if MS_OVERLAY is specified, which
- * would defeat the point. We also avoid this check if 'remount' is
- * specified.
+ * mount. We don't perform this check if 'remount' is specified.
*/
- if ((flags & MS_OVERLAY) == 0 &&
- strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
+ if (strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
!dir_is_empty(mountpoint)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"directory is not empty"));
}
/* perform the mount */
- if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags,
- MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) {
+ rc = do_mount(zfs_get_name(zhp), mountpoint, mntopts);
+ if (rc) {
/*
* Generic errors are nasty, but there are just way too many
* from mount(), and they're well-understood. We pick a few
* common ones to improve upon.
*/
- if (errno == EBUSY) {
+ if (rc == EBUSY) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"mountpoint or dataset is busy"));
- } else if (errno == EPERM) {
+ } else if (rc == EPERM) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"Insufficient privileges"));
+ } else if (rc == ENOTSUP) {
+ char buf[256];
+ int spa_version;
+
+ VERIFY(zfs_spa_version(zhp, &spa_version) == 0);
+ (void) snprintf(buf, sizeof (buf),
+ dgettext(TEXT_DOMAIN, "Can't mount a version %lld "
+ "file system on a version %d pool. Pool must be"
+ " upgraded to mount this file system."),
+ (u_longlong_t)zfs_prop_get_int(zhp,
+ ZFS_PROP_VERSION), spa_version);
+ zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf));
} else {
- zfs_error_aux(hdl, strerror(errno));
+ zfs_error_aux(hdl, strerror(rc));
}
return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
}
/* add the mounted entry into our cache */
- libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint,
- mntopts);
+ libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, mntopts);
return (0);
}
static int
unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
{
- if (umount2(mountpoint, flags) != 0) {
+ if (do_unmount(mountpoint, flags) != 0) {
zfs_error_aux(hdl, strerror(errno));
return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED,
dgettext(TEXT_DOMAIN, "cannot unmount '%s'"),
zfs_share_proto_t *curr_proto;
if (ZFS_IS_VOLUME(zhp))
- return (zfs_is_shared_iscsi(zhp));
+ return (B_FALSE);
for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
curr_proto++)
int
zfs_share(zfs_handle_t *zhp)
{
- if (ZFS_IS_VOLUME(zhp))
- return (zfs_share_iscsi(zhp));
-
+ assert(!ZFS_IS_VOLUME(zhp));
return (zfs_share_proto(zhp, share_all_proto));
}
int
zfs_unshare(zfs_handle_t *zhp)
{
- if (ZFS_IS_VOLUME(zhp))
- return (zfs_unshare_iscsi(zhp));
-
+ assert(!ZFS_IS_VOLUME(zhp));
return (zfs_unshareall(zhp));
}
if (!zfs_is_mounted(zhp, &mountpoint))
return (SHARED_NOT_SHARED);
- if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) {
+ if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto))) {
if (where != NULL)
*where = mountpoint;
else
* values to be used later. This is triggered by the runtime loader.
* Make sure the correct ISA version is loaded.
*/
-
+#ifdef __GNUC__
+static void
+_zfs_init_libshare(void) __attribute__((constructor));
+#else
#pragma init(_zfs_init_libshare)
+#endif
static void
_zfs_init_libshare(void)
{
return (0);
if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
+#ifdef HAVE_SHARE
(void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
dgettext(TEXT_DOMAIN, "cannot share '%s': %s"),
zfs_get_name(zhp), _sa_errorstr != NULL ?
_sa_errorstr(ret) : "");
+#endif /* HAVE_SHARE */
return (-1);
}
}
}
-boolean_t
-zfs_is_shared_iscsi(zfs_handle_t *zhp)
-{
-
- /*
- * If iscsi deamon isn't running then we aren't shared
- */
- if (iscsitgt_svc_online && iscsitgt_svc_online() == 1)
- return (B_FALSE);
- else
- return (iscsitgt_zfs_is_shared != NULL &&
- iscsitgt_zfs_is_shared(zhp->zfs_name) != 0);
-}
-
-int
-zfs_share_iscsi(zfs_handle_t *zhp)
-{
- char shareopts[ZFS_MAXPROPLEN];
- const char *dataset = zhp->zfs_name;
- libzfs_handle_t *hdl = zhp->zfs_hdl;
-
- /*
- * Return success if there are no share options.
- */
- if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
- sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 ||
- strcmp(shareopts, "off") == 0)
- return (0);
-
- if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0) {
- int error = EZFS_SHAREISCSIFAILED;
-
- /*
- * If service isn't availabele and EPERM was
- * returned then use special error.
- */
- if (iscsitgt_svc_online && errno == EPERM &&
- (iscsitgt_svc_online() != 0))
- error = EZFS_ISCSISVCUNAVAIL;
-
- return (zfs_error_fmt(hdl, error,
- dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset));
- }
-
- return (0);
-}
-
-int
-zfs_unshare_iscsi(zfs_handle_t *zhp)
+void
+libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp)
{
- const char *dataset = zfs_get_name(zhp);
- libzfs_handle_t *hdl = zhp->zfs_hdl;
-
- /*
- * Return if the volume is not shared
- */
- if (zfs_is_shared_iscsi(zhp) != SHARED_ISCSI)
- return (0);
+ if (cbp->cb_alloc == cbp->cb_used) {
+ size_t newsz;
+ void *ptr;
- /*
- * If this fails with ENODEV it indicates that zvol wasn't shared so
- * we should return success in that case.
- */
- if (iscsitgt_zfs_unshare == NULL ||
- (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV)) {
- if (errno == EPERM)
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "Insufficient privileges to unshare iscsi"));
- return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED,
- dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset));
+ newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64;
+ ptr = zfs_realloc(zhp->zfs_hdl,
+ cbp->cb_handles, cbp->cb_alloc * sizeof (void *),
+ newsz * sizeof (void *));
+ cbp->cb_handles = ptr;
+ cbp->cb_alloc = newsz;
}
-
- return (0);
+ cbp->cb_handles[cbp->cb_used++] = zhp;
}
-typedef struct mount_cbdata {
- zfs_handle_t **cb_datasets;
- int cb_used;
- int cb_alloc;
-} mount_cbdata_t;
-
static int
mount_cb(zfs_handle_t *zhp, void *data)
{
- mount_cbdata_t *cbp = data;
+ get_all_cb_t *cbp = data;
- if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) {
+ if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) {
zfs_close(zhp);
return (0);
}
return (0);
}
- if (cbp->cb_alloc == cbp->cb_used) {
- void *ptr;
-
- if ((ptr = zfs_realloc(zhp->zfs_hdl,
- cbp->cb_datasets, cbp->cb_alloc * sizeof (void *),
- cbp->cb_alloc * 2 * sizeof (void *))) == NULL)
- return (-1);
- cbp->cb_datasets = ptr;
-
- cbp->cb_alloc *= 2;
+ libzfs_add_handle(cbp, zhp);
+ if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) {
+ zfs_close(zhp);
+ return (-1);
}
-
- cbp->cb_datasets[cbp->cb_used++] = zhp;
-
- return (zfs_iter_filesystems(zhp, mount_cb, cbp));
+ return (0);
}
-static int
-dataset_cmp(const void *a, const void *b)
+int
+libzfs_dataset_cmp(const void *a, const void *b)
{
zfs_handle_t **za = (zfs_handle_t **)a;
zfs_handle_t **zb = (zfs_handle_t **)b;
int
zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
{
- mount_cbdata_t cb = { 0 };
+ get_all_cb_t cb = { 0 };
libzfs_handle_t *hdl = zhp->zpool_hdl;
zfs_handle_t *zfsp;
int i, ret = -1;
/*
* Gather all non-snap datasets within the pool.
*/
- if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL)
- return (-1);
- cb.cb_alloc = 4;
-
if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
goto out;
- cb.cb_datasets[0] = zfsp;
- cb.cb_used = 1;
-
+ libzfs_add_handle(&cb, zfsp);
if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0)
goto out;
-
/*
* Sort the datasets by mountpoint.
*/
- qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp);
+ qsort(cb.cb_handles, cb.cb_used, sizeof (void *),
+ libzfs_dataset_cmp);
/*
* And mount all the datasets, keeping track of which ones
- * succeeded or failed. By using zfs_alloc(), the good pointer
- * will always be non-NULL.
+ * succeeded or failed.
*/
- good = zfs_alloc(zhp->zpool_hdl, cb.cb_used * sizeof (int));
+ if ((good = zfs_alloc(zhp->zpool_hdl,
+ cb.cb_used * sizeof (int))) == NULL)
+ goto out;
+
ret = 0;
for (i = 0; i < cb.cb_used; i++) {
- if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0)
+ if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0)
ret = -1;
else
good[i] = 1;
* zfs_alloc is supposed to exit if memory isn't available.
*/
for (i = 0; i < cb.cb_used; i++) {
- if (good[i] && zfs_share(cb.cb_datasets[i]) != 0)
+ if (good[i] && zfs_share(cb.cb_handles[i]) != 0)
ret = -1;
}
out:
for (i = 0; i < cb.cb_used; i++)
- zfs_close(cb.cb_datasets[i]);
- free(cb.cb_datasets);
+ zfs_close(cb.cb_handles[i]);
+ free(cb.cb_handles);
return (ret);
}
-
-static int
-zvol_cb(const char *dataset, void *data)
-{
- libzfs_handle_t *hdl = data;
- zfs_handle_t *zhp;
-
- /*
- * Ignore snapshots and ignore failures from non-existant datasets.
- */
- if (strchr(dataset, '@') != NULL ||
- (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL)
- return (0);
-
- if (zfs_unshare_iscsi(zhp) != 0)
- return (-1);
-
- zfs_close(zhp);
-
- return (0);
-}
-
static int
mountpoint_compare(const void *a, const void *b)
{
return (strcmp(mountb, mounta));
}
+/* alias for 2002/240 */
+#pragma weak zpool_unmount_datasets = zpool_disable_datasets
/*
* Unshare and unmount all datasets within the given pool. We don't want to
* rely on traversing the DSL to discover the filesystems within the pool,
* because this may be expensive (if not all of them are mounted), and can fail
- * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
+ * arbitrarily (on I/O error, for example). Instead, we walk /etc/mtab and
* gather all the filesystems that are currently mounted.
*/
-#pragma weak zpool_unmount_datasets = zpool_disable_datasets
int
zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
{
int ret = -1;
int flags = (force ? MS_FORCE : 0);
- /*
- * First unshare all zvols.
- */
- if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0)
- return (-1);
-
namelen = strlen(zhp->zpool_name);
rewind(hdl->libzfs_mnttab);
return (ret);
}
+
+#else /* HAVE_ZPL */
+
+int
+zfs_unshare_iscsi(zfs_handle_t *zhp)
+{
+ return 0;
+}
+
+int
+zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
+{
+ return 0;
+}
+
+void
+remove_mountpoint(zfs_handle_t *zhp) {
+ return;
+}
+
+boolean_t
+is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
+{
+ return B_FALSE;
+}
+
+boolean_t
+zfs_is_mounted(zfs_handle_t *zhp, char **where)
+{
+ return is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where);
+}
+
+boolean_t
+zfs_is_shared(zfs_handle_t *zhp)
+{
+ return B_FALSE;
+}
+
+int
+zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
+{
+ return B_FALSE;
+}
+
+int
+zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
+{
+ return B_FALSE;
+}
+#endif /* HAVE_ZPL */
git://git.camperquake.de / zfs.git / blobdiff