1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _LIBZFS_H 27 #define _LIBZFS_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <assert.h> 32 #include <libnvpair.h> 33 #include <sys/param.h> 34 #include <sys/types.h> 35 #include <sys/varargs.h> 36 #include <sys/fs/zfs.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Miscellaneous ZFS constants 44 */ 45 #define ZFS_MAXNAMELEN MAXNAMELEN 46 #define ZPOOL_MAXNAMELEN MAXNAMELEN 47 #define ZFS_MAXPROPLEN MAXPATHLEN 48 49 /* 50 * Basic handle types 51 */ 52 typedef struct zfs_handle zfs_handle_t; 53 typedef struct zpool_handle zpool_handle_t; 54 55 /* 56 * Basic handle functions 57 */ 58 extern zpool_handle_t *zpool_open(const char *); 59 extern zpool_handle_t *zpool_open_canfail(const char *); 60 extern void zpool_close(zpool_handle_t *); 61 extern const char *zpool_get_name(zpool_handle_t *); 62 extern uint64_t zpool_get_guid(zpool_handle_t *); 63 extern uint64_t zpool_get_space_used(zpool_handle_t *); 64 extern uint64_t zpool_get_space_total(zpool_handle_t *); 65 extern int zpool_get_root(zpool_handle_t *, char *, size_t); 66 extern int zpool_get_state(zpool_handle_t *); 67 68 /* 69 * Iterate over all active pools in the system. 70 */ 71 typedef int (*zpool_iter_f)(zpool_handle_t *, void *); 72 extern int zpool_iter(zpool_iter_f, void *); 73 74 /* 75 * Functions to create and destroy pools 76 */ 77 extern int zpool_create(const char *, nvlist_t *, const char *); 78 extern int zpool_destroy(zpool_handle_t *); 79 extern int zpool_add(zpool_handle_t *, nvlist_t *); 80 81 /* 82 * Functions to manipulate pool and vdev state 83 */ 84 extern int zpool_scrub(zpool_handle_t *, pool_scrub_type_t); 85 86 extern int zpool_vdev_online(zpool_handle_t *, const char *); 87 extern int zpool_vdev_offline(zpool_handle_t *, const char *, int); 88 extern int zpool_vdev_attach(zpool_handle_t *, const char *, const char *, 89 nvlist_t *, int); 90 extern int zpool_vdev_detach(zpool_handle_t *, const char *); 91 92 /* 93 * Pool health statistics. 94 */ 95 typedef enum { 96 /* 97 * The following correspond to faults as defined in the (fault.fs.zfs.*) 98 * event namespace. Each is associated with a corresponding message ID. 99 */ 100 ZPOOL_STATUS_CORRUPT_CACHE, /* corrupt /kernel/drv/zpool.cache */ 101 ZPOOL_STATUS_MISSING_DEV_R, /* missing device with replicas */ 102 ZPOOL_STATUS_MISSING_DEV_NR, /* missing device with no replicas */ 103 ZPOOL_STATUS_CORRUPT_LABEL_R, /* bad device label with replicas */ 104 ZPOOL_STATUS_CORRUPT_LABEL_NR, /* bad device label with no replicas */ 105 ZPOOL_STATUS_BAD_GUID_SUM, /* sum of device guids didn't match */ 106 ZPOOL_STATUS_CORRUPT_POOL, /* pool metadata is corrupted */ 107 ZPOOL_STATUS_CORRUPT_DATA, /* data errors in user (meta)data */ 108 ZPOOL_STATUS_FAILING_DEV, /* device experiencing errors */ 109 ZPOOL_STATUS_VERSION_MISMATCH, /* bad on-disk version */ 110 111 /* 112 * The following are not faults per se, but still an error possibly 113 * requiring administrative attention. There is no corresponding 114 * message ID. 115 */ 116 ZPOOL_STATUS_RESILVERING, /* device being resilvered */ 117 ZPOOL_STATUS_OFFLINE_DEV, /* device online */ 118 119 /* 120 * Finally, the following indicates a healthy pool. 121 */ 122 ZPOOL_STATUS_OK 123 } zpool_status_t; 124 125 extern zpool_status_t zpool_get_status(zpool_handle_t *, char **msgid); 126 extern zpool_status_t zpool_import_status(nvlist_t *, char **msgid); 127 128 /* 129 * Statistics and configuration functions. 130 */ 131 extern nvlist_t *zpool_get_config(zpool_handle_t *, nvlist_t **oldconfig); 132 extern int zpool_refresh_stats(zpool_handle_t *); 133 134 /* 135 * Import and export functions 136 */ 137 extern int zpool_export(zpool_handle_t *); 138 extern int zpool_import(nvlist_t *, const char *, const char *); 139 140 /* 141 * Search for pools to import 142 */ 143 extern nvlist_t *zpool_find_import(int argc, char **argv); 144 145 /* 146 * Miscellaneous pool functions 147 */ 148 extern char *zpool_vdev_name(zpool_handle_t *, nvlist_t *); 149 150 /* 151 * Basic handle manipulations. These functions do not create or destroy the 152 * underlying datasets, only the references to them. 153 */ 154 extern zfs_handle_t *zfs_open(const char *, int); 155 extern void zfs_close(zfs_handle_t *); 156 extern zfs_type_t zfs_get_type(const zfs_handle_t *); 157 extern const char *zfs_get_name(const zfs_handle_t *); 158 159 typedef enum { 160 ZFS_SRC_NONE = 0x1, 161 ZFS_SRC_DEFAULT = 0x2, 162 ZFS_SRC_TEMPORARY = 0x4, 163 ZFS_SRC_LOCAL = 0x8, 164 ZFS_SRC_INHERITED = 0x10 165 } zfs_source_t; 166 167 #define ZFS_SRC_ALL 0x1f 168 169 /* 170 * Property management functions. Some functions are shared with the kernel, 171 * and are found in sys/fs/zfs.h. 172 */ 173 const char *zfs_prop_to_name(zfs_prop_t); 174 int zfs_prop_set(zfs_handle_t *, zfs_prop_t, const char *); 175 int zfs_prop_get(zfs_handle_t *, zfs_prop_t, char *, size_t, zfs_source_t *, 176 char *, size_t, int); 177 int zfs_prop_get_numeric(zfs_handle_t *, zfs_prop_t, uint64_t *, zfs_source_t *, 178 char *, size_t); 179 uint64_t zfs_prop_get_int(zfs_handle_t *, zfs_prop_t); 180 int zfs_prop_validate(zfs_prop_t, const char *, uint64_t *); 181 int zfs_prop_inheritable(zfs_prop_t); 182 int zfs_prop_inherit(zfs_handle_t *, zfs_prop_t); 183 const char *zfs_prop_values(zfs_prop_t); 184 int zfs_prop_valid_for_type(zfs_prop_t, int); 185 const char *zfs_prop_default_string(zfs_prop_t prop); 186 uint64_t zfs_prop_default_numeric(zfs_prop_t); 187 int zfs_prop_is_string(zfs_prop_t prop); 188 const char *zfs_prop_column_name(zfs_prop_t); 189 const char *zfs_prop_column_format(zfs_prop_t); 190 int zfs_get_proplist(char *fields, zfs_prop_t *proplist, int max, int *count, 191 char **badopt); 192 193 #define ZFS_MOUNTPOINT_NONE "none" 194 #define ZFS_MOUNTPOINT_LEGACY "legacy" 195 196 /* 197 * Iterator functions. 198 */ 199 typedef int (*zfs_iter_f)(zfs_handle_t *, void *); 200 extern int zfs_iter_root(zfs_iter_f, void *); 201 extern int zfs_iter_children(zfs_handle_t *, zfs_iter_f, void *); 202 extern int zfs_iter_dependents(zfs_handle_t *, zfs_iter_f, void *); 203 extern int zfs_iter_filesystems(zfs_handle_t *, zfs_iter_f, void *); 204 extern int zfs_iter_snapshots(zfs_handle_t *, zfs_iter_f, void *); 205 206 /* 207 * Functions to create and destroy datasets. 208 */ 209 extern int zfs_create(const char *, zfs_type_t, const char *, const char *); 210 extern int zfs_destroy(zfs_handle_t *); 211 extern int zfs_clone(zfs_handle_t *, const char *); 212 extern int zfs_snapshot(const char *); 213 extern int zfs_rollback(zfs_handle_t *, zfs_handle_t *, int); 214 extern int zfs_rename(zfs_handle_t *, const char *); 215 extern int zfs_backup(zfs_handle_t *, zfs_handle_t *); 216 extern int zfs_restore(const char *, int, int, int); 217 218 /* 219 * Miscellaneous functions. 220 */ 221 extern const char *zfs_type_to_name(zfs_type_t); 222 extern void zfs_refresh_properties(zfs_handle_t *); 223 extern int zfs_name_valid(const char *, zfs_type_t); 224 225 /* 226 * Mount support functions. 227 */ 228 extern int zfs_is_mounted(zfs_handle_t *, char **); 229 extern int zfs_mount(zfs_handle_t *, const char *, int); 230 extern int zfs_unmount(zfs_handle_t *, const char *, int); 231 extern int zfs_unmountall(zfs_handle_t *, int); 232 233 /* 234 * Share support functions. 235 */ 236 extern int zfs_is_shared(zfs_handle_t *, char **); 237 extern int zfs_share(zfs_handle_t *); 238 extern int zfs_unshare(zfs_handle_t *, const char *); 239 extern int zfs_unshareall(zfs_handle_t *); 240 241 /* 242 * For clients that need to capture error output. 243 */ 244 extern void zfs_set_error_handler(void (*)(const char *, va_list)); 245 246 /* 247 * When dealing with nvlists, verify() is extremely useful 248 */ 249 #ifdef NDEBUG 250 #define verify(EX) ((void)(EX)) 251 #else 252 #define verify(EX) assert(EX) 253 #endif 254 255 /* 256 * Utility function to convert a number to a human-readable form. 257 */ 258 extern void zfs_nicenum(uint64_t, char *, size_t); 259 extern int zfs_nicestrtonum(const char *, uint64_t *); 260 261 /* 262 * Pool destroy special. Remove the device information without destroying 263 * the underlying dataset. 264 */ 265 extern int zfs_remove_link(zfs_handle_t *); 266 267 /* 268 * Given a device or file, determine if it is part of a pool. 269 */ 270 extern int zpool_in_use(int fd, pool_state_t *state, char **name); 271 272 /* 273 * ftyp special. Read the label from a given device. 274 */ 275 extern nvlist_t *zpool_read_label(int fd); 276 277 /* 278 * Create and remove zvol /dev links 279 */ 280 extern int zpool_create_zvol_links(zpool_handle_t *); 281 extern int zpool_remove_zvol_links(zpool_handle_t *); 282 283 /* 284 * zoneadmd hack 285 */ 286 extern void zfs_init(void); 287 288 /* 289 * Useful defines 290 */ 291 #ifndef TRUE 292 #define TRUE 1 293 #endif 294 #ifndef FALSE 295 #define FALSE 0 296 #endif 297 298 #ifdef __cplusplus 299 } 300 #endif 301 302 #endif /* _LIBZFS_H */ 303