X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=lib%2Flibzfs%2Flibzfs_mount.c;h=9950bf9670f231448e7cac968caff1e5b5fbd801;hb=b3259b6a2ba29595dc5f2df0f6def8c7fc6bcb98;hp=7c5c7f3ecaeed850c032b254610c643d60adbd6f;hpb=172bb4bd5e4afef721dd4d2972d8680d983f144b;p=zfs.git diff --git a/lib/libzfs/libzfs_mount.c b/lib/libzfs/libzfs_mount.c index 7c5c7f3..9950bf9 100644 --- a/lib/libzfs/libzfs_mount.c +++ b/lib/libzfs/libzfs_mount.c @@ -20,8 +20,7 @@ */ /* - * 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. */ /* @@ -44,17 +43,14 @@ * * 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: @@ -74,9 +70,11 @@ #include #include #include -#include #include #include +#ifdef HAVE_LIBSELINUX +#include +#endif /* HAVE_LIBSELINUX */ #include @@ -86,15 +84,11 @@ #include #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 @@ -126,29 +120,6 @@ zfs_share_proto_t share_all_proto[] = { 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 * a zfs_share_type_t value. @@ -236,18 +207,9 @@ dir_is_empty(const char *dirname) boolean_t is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) { - struct mnttab search = { 0 }, entry; - - /* - * Search for the entry in /etc/mnttab. We don't bother getting the - * mountpoint, as we can just search for the special device. This will - * also let us find mounts when the mountpoint is 'legacy'. - */ - search.mnt_special = (char *)special; - search.mnt_fstype = MNTTYPE_ZFS; + struct mnttab entry; - rewind(zfs_hdl->libzfs_mnttab); - if (getmntany(zfs_hdl->libzfs_mnttab, &entry, &search) != 0) + if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) return (B_FALSE); if (where != NULL) @@ -312,6 +274,18 @@ zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 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)) + flags |= MS_RDONLY; + +#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); @@ -355,15 +329,29 @@ zfs_mount(zfs_handle_t *zhp, const char *options, int flags) } else if (errno == EPERM) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Insufficient privileges")); + } else if (errno == 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)); } - return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), zhp->zfs_name)); } + /* add the mounted entry into our cache */ + libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, + mntopts); return (0); } @@ -389,26 +377,23 @@ unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) int zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) { - struct mnttab search = { 0 }, entry; + libzfs_handle_t *hdl = zhp->zfs_hdl; + struct mnttab entry; char *mntpt = NULL; - /* check to see if need to unmount the filesystem */ - search.mnt_special = zhp->zfs_name; - search.mnt_fstype = MNTTYPE_ZFS; - rewind(zhp->zfs_hdl->libzfs_mnttab); + /* check to see if we need to unmount the filesystem */ if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && - getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) { - + libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { /* * mountpoint may have come from a call to * getmnt/getmntany if it isn't NULL. If it is NULL, - * we know it comes from getmntany which can then get - * overwritten later. We strdup it to play it safe. + * we know it comes from libzfs_mnttab_find which can + * then get freed later. We strdup it to play it safe. */ if (mountpoint == NULL) - mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); + mntpt = zfs_strdup(hdl, entry.mnt_mountp); else - mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint); + mntpt = zfs_strdup(hdl, mountpoint); /* * Unshare and unmount the filesystem @@ -416,11 +401,12 @@ zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) return (-1); - if (unmount_one(zhp->zfs_hdl, mntpt, flags) != 0) { + if (unmount_one(hdl, mntpt, flags) != 0) { free(mntpt); (void) zfs_shareall(zhp); return (-1); } + libzfs_mnttab_remove(hdl, zhp->zfs_name); free(mntpt); } @@ -455,7 +441,7 @@ zfs_is_shared(zfs_handle_t *zhp) 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++) @@ -467,18 +453,14 @@ zfs_is_shared(zfs_handle_t *zhp) 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)); } @@ -494,7 +476,7 @@ zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 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 @@ -546,8 +528,12 @@ static void (*_sa_update_sharetab_ts)(sa_handle_t); * 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) { @@ -849,7 +835,7 @@ unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, char *mntpt; /* * Mountpoint could get trashed if libshare calls getmntany - * which id does during API initialization, so strdup the + * which it does during API initialization, so strdup the * value. */ mntpt = zfs_strdup(hdl, mountpoint); @@ -887,18 +873,17 @@ int zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, zfs_share_proto_t *proto) { - struct mnttab search = { 0 }, entry; + libzfs_handle_t *hdl = zhp->zfs_hdl; + struct mnttab entry; char *mntpt = NULL; /* check to see if need to unmount the filesystem */ - search.mnt_special = (char *)zfs_get_name(zhp); - search.mnt_fstype = MNTTYPE_ZFS; rewind(zhp->zfs_hdl->libzfs_mnttab); if (mountpoint != NULL) - mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint); + mountpoint = mntpt = zfs_strdup(hdl, mountpoint); if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && - getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) { + libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { zfs_share_proto_t *curr_proto; if (mountpoint == NULL) @@ -907,8 +892,8 @@ zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { - if (is_shared(zhp->zfs_hdl, mntpt, *curr_proto) && - unshare_one(zhp->zfs_hdl, zhp->zfs_name, + if (is_shared(hdl, mntpt, *curr_proto) && + unshare_one(hdl, zhp->zfs_name, mntpt, *curr_proto) != 0) { if (mntpt != NULL) free(mntpt); @@ -1010,93 +995,29 @@ remove_mountpoint(zfs_handle_t *zhp) } } -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); } @@ -1106,25 +1027,16 @@ mount_cb(zfs_handle_t *zhp, void *data) 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; @@ -1162,7 +1074,7 @@ dataset_cmp(const void *a, const void *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; @@ -1171,33 +1083,29 @@ zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) /* * 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; @@ -1210,7 +1118,7 @@ zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) * 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; } @@ -1218,34 +1126,12 @@ zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 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) { @@ -1255,6 +1141,8 @@ 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, @@ -1262,7 +1150,6 @@ mountpoint_compare(const void *a, const void *b) * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab 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) { @@ -1276,12 +1163,6 @@ 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); @@ -1397,3 +1278,53 @@ out: 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 */