diff options
Diffstat (limited to 'lib/libzfs/libzfs_dataset.c')
| -rw-r--r-- | lib/libzfs/libzfs_dataset.c | 363 |
1 files changed, 278 insertions, 85 deletions
diff --git a/lib/libzfs/libzfs_dataset.c b/lib/libzfs/libzfs_dataset.c index f0076e431..6385a47b7 100644 --- a/lib/libzfs/libzfs_dataset.c +++ b/lib/libzfs/libzfs_dataset.c @@ -38,7 +38,6 @@ #include <zone.h> #include <fcntl.h> #include <sys/mntent.h> -#include <sys/mnttab.h> #include <sys/mount.h> #include <sys/avl.h> #include <priv.h> @@ -108,7 +107,6 @@ path_to_str(const char *path, int types) return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT)); } - /* * The user has requested either filesystems or volumes. * We have no way of knowing a priori what type this would be, so always @@ -319,38 +317,35 @@ zpool_free_handles(libzfs_handle_t *hdl) * Utility function to gather stats (objset and zpl) for the given object. */ static int -get_stats(zfs_handle_t *zhp) +get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) { - zfs_cmd_t zc = { 0 }; libzfs_handle_t *hdl = zhp->zfs_hdl; - nvlist_t *allprops, *userprops; - - (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); - if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) - return (-1); + (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); - while (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) { + while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { if (errno == ENOMEM) { - if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { - zcmd_free_nvlists(&zc); + if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { return (-1); } } else { - zcmd_free_nvlists(&zc); return (-1); } } + return (0); +} - zhp->zfs_dmustats = zc.zc_objset_stats; /* structure assignment */ +static int +put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) +{ + nvlist_t *allprops, *userprops; - if (zcmd_read_dst_nvlist(hdl, &zc, &allprops) != 0) { - zcmd_free_nvlists(&zc); + zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ + + if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { return (-1); } - zcmd_free_nvlists(&zc); - if ((userprops = process_user_props(zhp, allprops)) == NULL) { nvlist_free(allprops); return (-1); @@ -365,6 +360,22 @@ get_stats(zfs_handle_t *zhp) return (0); } +static int +get_stats(zfs_handle_t *zhp) +{ + int rc = 0; + zfs_cmd_t zc = { 0 }; + + if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) + return (-1); + if (get_stats_ioctl(zhp, &zc) != 0) + rc = -1; + else if (put_stats_zhdl(zhp, &zc) != 0) + rc = -1; + zcmd_free_nvlists(&zc); + return (rc); +} + /* * Refresh the properties currently stored in the handle. */ @@ -378,16 +389,11 @@ zfs_refresh_properties(zfs_handle_t *zhp) * Makes a handle from the given dataset name. Used by zfs_open() and * zfs_iter_* to create child handles on the fly. */ -zfs_handle_t * -make_dataset_handle(libzfs_handle_t *hdl, const char *path) +static int +make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) { - zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); char *logstr; - - if (zhp == NULL) - return (NULL); - - zhp->zfs_hdl = hdl; + libzfs_handle_t *hdl = zhp->zfs_hdl; /* * Preserve history log string. @@ -396,17 +402,16 @@ make_dataset_handle(libzfs_handle_t *hdl, const char *path) */ logstr = zhp->zfs_hdl->libzfs_log_str; zhp->zfs_hdl->libzfs_log_str = NULL; -top: - (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); - if (get_stats(zhp) != 0) { +top: + if (put_stats_zhdl(zhp, zc) != 0) { zhp->zfs_hdl->libzfs_log_str = logstr; - free(zhp); - return (NULL); + return (-1); } + if (zhp->zfs_dmustats.dds_inconsistent) { - zfs_cmd_t zc = { 0 }; + zfs_cmd_t zc2 = { 0 }; /* * If it is dds_inconsistent, then we've caught it in @@ -423,28 +428,33 @@ top: * will fail with EBUSY and we will drive on as usual. */ - (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); + (void) strlcpy(zc2.zc_name, zhp->zfs_name, + sizeof (zc2.zc_name)); if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) { (void) zvol_remove_link(hdl, zhp->zfs_name); - zc.zc_objset_type = DMU_OST_ZVOL; + zc2.zc_objset_type = DMU_OST_ZVOL; } else { - zc.zc_objset_type = DMU_OST_ZFS; + zc2.zc_objset_type = DMU_OST_ZFS; } /* * If we can successfully destroy it, pretend that it * never existed. */ - if (ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc) == 0) { + if (ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc2) == 0) { zhp->zfs_hdl->libzfs_log_str = logstr; - free(zhp); errno = ENOENT; - return (NULL); + return (-1); } - /* If we can successfully roll it back, reget the stats */ - if (ioctl(hdl->libzfs_fd, ZFS_IOC_ROLLBACK, &zc) == 0) + /* If we can successfully roll it back, reset the stats */ + if (ioctl(hdl->libzfs_fd, ZFS_IOC_ROLLBACK, &zc2) == 0) { + if (get_stats_ioctl(zhp, zc) != 0) { + zhp->zfs_hdl->libzfs_log_str = logstr; + return (-1); + } goto top; + } } /* @@ -469,6 +479,52 @@ top: zhp->zfs_hdl->libzfs_log_str = logstr; zhp->zpool_hdl = zpool_handle(zhp); + return (0); +} + +zfs_handle_t * +make_dataset_handle(libzfs_handle_t *hdl, const char *path) +{ + zfs_cmd_t zc = { 0 }; + + zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); + + if (zhp == NULL) + return (NULL); + + zhp->zfs_hdl = hdl; + (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); + if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { + free(zhp); + return (NULL); + } + if (get_stats_ioctl(zhp, &zc) == -1) { + zcmd_free_nvlists(&zc); + free(zhp); + return (NULL); + } + if (make_dataset_handle_common(zhp, &zc) == -1) { + free(zhp); + zhp = NULL; + } + zcmd_free_nvlists(&zc); + return (zhp); +} + +static zfs_handle_t * +make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) +{ + zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); + + if (zhp == NULL) + return (NULL); + + zhp->zfs_hdl = hdl; + (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); + if (make_dataset_handle_common(zhp, zc) == -1) { + free(zhp); + return (NULL); + } return (zhp); } @@ -527,6 +583,117 @@ zfs_close(zfs_handle_t *zhp) free(zhp); } +typedef struct mnttab_node { + struct mnttab mtn_mt; + avl_node_t mtn_node; +} mnttab_node_t; + +static int +libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) +{ + const mnttab_node_t *mtn1 = arg1; + const mnttab_node_t *mtn2 = arg2; + int rv; + + rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); + + if (rv == 0) + return (0); + return (rv > 0 ? 1 : -1); +} + +void +libzfs_mnttab_init(libzfs_handle_t *hdl) +{ + struct mnttab entry; + + assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); + avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, + sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); + + rewind(hdl->libzfs_mnttab); + while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { + mnttab_node_t *mtn; + + if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) + continue; + mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); + mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); + mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); + mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); + mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); + avl_add(&hdl->libzfs_mnttab_cache, mtn); + } +} + +void +libzfs_mnttab_fini(libzfs_handle_t *hdl) +{ + void *cookie = NULL; + mnttab_node_t *mtn; + + while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) { + free(mtn->mtn_mt.mnt_special); + free(mtn->mtn_mt.mnt_mountp); + free(mtn->mtn_mt.mnt_fstype); + free(mtn->mtn_mt.mnt_mntopts); + free(mtn); + } + avl_destroy(&hdl->libzfs_mnttab_cache); +} + +int +libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, + struct mnttab *entry) +{ + mnttab_node_t find; + mnttab_node_t *mtn; + + if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) + libzfs_mnttab_init(hdl); + + find.mtn_mt.mnt_special = (char *)fsname; + mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); + if (mtn) { + *entry = mtn->mtn_mt; + return (0); + } + return (ENOENT); +} + +void +libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, + const char *mountp, const char *mntopts) +{ + mnttab_node_t *mtn; + + if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) + return; + mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); + mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); + mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); + mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); + mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); + avl_add(&hdl->libzfs_mnttab_cache, mtn); +} + +void +libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) +{ + mnttab_node_t find; + mnttab_node_t *ret; + + find.mtn_mt.mnt_special = (char *)fsname; + if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) { + avl_remove(&hdl->libzfs_mnttab_cache, ret); + free(ret->mtn_mt.mnt_special); + free(ret->mtn_mt.mnt_mountp); + free(ret->mtn_mt.mnt_fstype); + free(ret->mtn_mt.mnt_mntopts); + free(ret); + } +} + int zfs_spa_version(zfs_handle_t *zhp, int *spa_version) { @@ -2123,15 +2290,11 @@ get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, */ if (!zhp->zfs_mntcheck && (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { - struct mnttab entry, search = { 0 }; - FILE *mnttab = zhp->zfs_hdl->libzfs_mnttab; + libzfs_handle_t *hdl = zhp->zfs_hdl; + struct mnttab entry; - search.mnt_special = (char *)zhp->zfs_name; - search.mnt_fstype = MNTTYPE_ZFS; - rewind(mnttab); - - if (getmntany(mnttab, &entry, &search) == 0) { - zhp->zfs_mntopts = zfs_strdup(zhp->zfs_hdl, + if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { + zhp->zfs_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); if (zhp->zfs_mntopts == NULL) return (-1); @@ -2575,6 +2738,46 @@ zfs_get_type(const zfs_handle_t *zhp) return (zhp->zfs_type); } +static int +zfs_do_list_ioctl(zfs_handle_t *zhp, int arg, zfs_cmd_t *zc) +{ + int rc; + uint64_t orig_cookie; + + orig_cookie = zc->zc_cookie; +top: + (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); + rc = ioctl(zhp->zfs_hdl->libzfs_fd, arg, zc); + + if (rc == -1) { + switch (errno) { + case ENOMEM: + /* expand nvlist memory and try again */ + if (zcmd_expand_dst_nvlist(zhp->zfs_hdl, zc) != 0) { + zcmd_free_nvlists(zc); + return (-1); + } + zc->zc_cookie = orig_cookie; + goto top; + /* + * An errno value of ESRCH indicates normal completion. + * If ENOENT is returned, then the underlying dataset + * has been removed since we obtained the handle. + */ + case ESRCH: + case ENOENT: + rc = 1; + break; + default: + rc = zfs_standard_error(zhp->zfs_hdl, errno, + dgettext(TEXT_DOMAIN, + "cannot iterate filesystems")); + break; + } + } + return (rc); +} + /* * Iterate over all child filesystems */ @@ -2588,9 +2791,11 @@ zfs_iter_filesystems(zfs_handle_t *zhp, zfs_iter_f func, void *data) if (zhp->zfs_type != ZFS_TYPE_FILESYSTEM) return (0); - for ((void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); - ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_DATASET_LIST_NEXT, &zc) == 0; - (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name))) { + if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) + return (-1); + + while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_DATASET_LIST_NEXT, + &zc)) == 0) { /* * Ignore private dataset names. */ @@ -2601,24 +2806,18 @@ zfs_iter_filesystems(zfs_handle_t *zhp, zfs_iter_f func, void *data) * Silently ignore errors, as the only plausible explanation is * that the pool has since been removed. */ - if ((nzhp = make_dataset_handle(zhp->zfs_hdl, - zc.zc_name)) == NULL) + if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl, + &zc)) == NULL) { continue; + } - if ((ret = func(nzhp, data)) != 0) + if ((ret = func(nzhp, data)) != 0) { + zcmd_free_nvlists(&zc); return (ret); + } } - - /* - * An errno value of ESRCH indicates normal completion. If ENOENT is - * returned, then the underlying dataset has been removed since we - * obtained the handle. - */ - if (errno != ESRCH && errno != ENOENT) - return (zfs_standard_error(zhp->zfs_hdl, errno, - dgettext(TEXT_DOMAIN, "cannot iterate filesystems"))); - - return (0); + zcmd_free_nvlists(&zc); + return ((ret < 0) ? ret : 0); } /* @@ -2634,29 +2833,23 @@ zfs_iter_snapshots(zfs_handle_t *zhp, zfs_iter_f func, void *data) if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) return (0); - for ((void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); - ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT, - &zc) == 0; - (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name))) { + if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) + return (-1); + while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_SNAPSHOT_LIST_NEXT, + &zc)) == 0) { - if ((nzhp = make_dataset_handle(zhp->zfs_hdl, - zc.zc_name)) == NULL) + if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl, + &zc)) == NULL) { continue; + } - if ((ret = func(nzhp, data)) != 0) + if ((ret = func(nzhp, data)) != 0) { + zcmd_free_nvlists(&zc); return (ret); + } } - - /* - * An errno value of ESRCH indicates normal completion. If ENOENT is - * returned, then the underlying dataset has been removed since we - * obtained the handle. Silently ignore this case, and return success. - */ - if (errno != ESRCH && errno != ENOENT) - return (zfs_standard_error(zhp->zfs_hdl, errno, - dgettext(TEXT_DOMAIN, "cannot iterate filesystems"))); - - return (0); + zcmd_free_nvlists(&zc); + return ((ret < 0) ? ret : 0); } /* @@ -2709,8 +2902,8 @@ check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, zfs_handle_t *zhp; char errbuf[1024]; - (void) snprintf(errbuf, sizeof (errbuf), "cannot create '%s'", - path); + (void) snprintf(errbuf, sizeof (errbuf), + dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); /* get parent, and check to see if this is just a pool */ if (parent_name(path, parent, sizeof (parent)) != 0) { |