1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22ea8dc4b6Seschrock * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens /* 29fa9e4066Sahrens * Internal utility routines for the ZFS library. 30fa9e4066Sahrens */ 31fa9e4066Sahrens 32fa9e4066Sahrens #include <errno.h> 33fa9e4066Sahrens #include <fcntl.h> 34fa9e4066Sahrens #include <libintl.h> 35fa9e4066Sahrens #include <stdarg.h> 36fa9e4066Sahrens #include <stdio.h> 37fa9e4066Sahrens #include <stdlib.h> 38fa9e4066Sahrens #include <strings.h> 39fa9e4066Sahrens #include <unistd.h> 40fa9e4066Sahrens #include <sys/mnttab.h> 41fa9e4066Sahrens 42fa9e4066Sahrens #include <libzfs.h> 43fa9e4066Sahrens 44fa9e4066Sahrens #include "libzfs_impl.h" 45fa9e4066Sahrens 4699653d4eSeschrock int 4799653d4eSeschrock libzfs_errno(libzfs_handle_t *hdl) 4899653d4eSeschrock { 4999653d4eSeschrock return (hdl->libzfs_error); 5099653d4eSeschrock } 51fa9e4066Sahrens 5299653d4eSeschrock const char * 5399653d4eSeschrock libzfs_error_action(libzfs_handle_t *hdl) 5499653d4eSeschrock { 5599653d4eSeschrock return (hdl->libzfs_action); 5699653d4eSeschrock } 57fa9e4066Sahrens 5899653d4eSeschrock const char * 5999653d4eSeschrock libzfs_error_description(libzfs_handle_t *hdl) 6099653d4eSeschrock { 6199653d4eSeschrock if (hdl->libzfs_desc[0] != '\0') 6299653d4eSeschrock return (hdl->libzfs_desc); 6399653d4eSeschrock 6499653d4eSeschrock switch (hdl->libzfs_error) { 6599653d4eSeschrock case EZFS_NOMEM: 6699653d4eSeschrock return (dgettext(TEXT_DOMAIN, "out of memory")); 6799653d4eSeschrock case EZFS_BADPROP: 6899653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid property value")); 6999653d4eSeschrock case EZFS_PROPREADONLY: 7099653d4eSeschrock return (dgettext(TEXT_DOMAIN, "read only property")); 7199653d4eSeschrock case EZFS_PROPTYPE: 7299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "property doesn't apply to " 7399653d4eSeschrock "datasets of this type")); 7499653d4eSeschrock case EZFS_PROPNONINHERIT: 7599653d4eSeschrock return (dgettext(TEXT_DOMAIN, "property cannot be inherited")); 7699653d4eSeschrock case EZFS_PROPSPACE: 7799653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid quota or reservation")); 7899653d4eSeschrock case EZFS_BADTYPE: 7999653d4eSeschrock return (dgettext(TEXT_DOMAIN, "operation not applicable to " 8099653d4eSeschrock "datasets of this type")); 8199653d4eSeschrock case EZFS_BUSY: 8299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "pool or dataset is busy")); 8399653d4eSeschrock case EZFS_EXISTS: 8499653d4eSeschrock return (dgettext(TEXT_DOMAIN, "pool or dataset exists")); 8599653d4eSeschrock case EZFS_NOENT: 8699653d4eSeschrock return (dgettext(TEXT_DOMAIN, "no such pool or dataset")); 8799653d4eSeschrock case EZFS_BADSTREAM: 8899653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid backup stream")); 8999653d4eSeschrock case EZFS_DSREADONLY: 9099653d4eSeschrock return (dgettext(TEXT_DOMAIN, "dataset is read only")); 9199653d4eSeschrock case EZFS_VOLTOOBIG: 9299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "volume size exceeds limit for " 9399653d4eSeschrock "this system")); 9499653d4eSeschrock case EZFS_VOLHASDATA: 9599653d4eSeschrock return (dgettext(TEXT_DOMAIN, "volume has data")); 9699653d4eSeschrock case EZFS_INVALIDNAME: 9799653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid name")); 9899653d4eSeschrock case EZFS_BADRESTORE: 9999653d4eSeschrock return (dgettext(TEXT_DOMAIN, "unable to restore to " 10099653d4eSeschrock "destination")); 10199653d4eSeschrock case EZFS_BADBACKUP: 10299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "backup failed")); 10399653d4eSeschrock case EZFS_BADTARGET: 10499653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid target vdev")); 10599653d4eSeschrock case EZFS_NODEVICE: 10699653d4eSeschrock return (dgettext(TEXT_DOMAIN, "no such device in pool")); 10799653d4eSeschrock case EZFS_BADDEV: 10899653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid device")); 10999653d4eSeschrock case EZFS_NOREPLICAS: 11099653d4eSeschrock return (dgettext(TEXT_DOMAIN, "no valid replicas")); 11199653d4eSeschrock case EZFS_RESILVERING: 11299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "currently resilvering")); 11399653d4eSeschrock case EZFS_BADVERSION: 11499653d4eSeschrock return (dgettext(TEXT_DOMAIN, "unsupported version")); 11599653d4eSeschrock case EZFS_POOLUNAVAIL: 11699653d4eSeschrock return (dgettext(TEXT_DOMAIN, "pool is unavailable")); 11799653d4eSeschrock case EZFS_DEVOVERFLOW: 11899653d4eSeschrock return (dgettext(TEXT_DOMAIN, "too many devices in one vdev")); 11999653d4eSeschrock case EZFS_BADPATH: 12099653d4eSeschrock return (dgettext(TEXT_DOMAIN, "must be an absolute path")); 12199653d4eSeschrock case EZFS_CROSSTARGET: 12299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "operation crosses datasets or " 12399653d4eSeschrock "pools")); 12499653d4eSeschrock case EZFS_ZONED: 12599653d4eSeschrock return (dgettext(TEXT_DOMAIN, "dataset in use by local zone")); 12699653d4eSeschrock case EZFS_MOUNTFAILED: 12799653d4eSeschrock return (dgettext(TEXT_DOMAIN, "mount failed")); 12899653d4eSeschrock case EZFS_UMOUNTFAILED: 12999653d4eSeschrock return (dgettext(TEXT_DOMAIN, "umount failed")); 13099653d4eSeschrock case EZFS_UNSHAREFAILED: 13199653d4eSeschrock return (dgettext(TEXT_DOMAIN, "unshare(1M) failed")); 13299653d4eSeschrock case EZFS_SHAREFAILED: 13399653d4eSeschrock return (dgettext(TEXT_DOMAIN, "share(1M) failed")); 13499653d4eSeschrock case EZFS_DEVLINKS: 13599653d4eSeschrock return (dgettext(TEXT_DOMAIN, "failed to create /dev links")); 13699653d4eSeschrock case EZFS_PERM: 13799653d4eSeschrock return (dgettext(TEXT_DOMAIN, "permission denied")); 13899653d4eSeschrock case EZFS_NOSPC: 13999653d4eSeschrock return (dgettext(TEXT_DOMAIN, "out of space")); 14099653d4eSeschrock case EZFS_IO: 14199653d4eSeschrock return (dgettext(TEXT_DOMAIN, "I/O error")); 14299653d4eSeschrock case EZFS_INTR: 14399653d4eSeschrock return (dgettext(TEXT_DOMAIN, "signal received")); 14499653d4eSeschrock case EZFS_ISSPARE: 14599653d4eSeschrock return (dgettext(TEXT_DOMAIN, "device is reserved as a hot " 14699653d4eSeschrock "spare")); 14799653d4eSeschrock case EZFS_INVALCONFIG: 14899653d4eSeschrock return (dgettext(TEXT_DOMAIN, "invalid vdev configuration")); 1493bb79becSeschrock case EZFS_RECURSIVE: 1503bb79becSeschrock return (dgettext(TEXT_DOMAIN, "recursive dataset dependency")); 15199653d4eSeschrock case EZFS_UNKNOWN: 15299653d4eSeschrock return (dgettext(TEXT_DOMAIN, "unknown error")); 15399653d4eSeschrock default: 154c08432ebSeschrock assert(hdl->libzfs_error == 0); 155c08432ebSeschrock return (dgettext(TEXT_DOMAIN, "no error")); 15699653d4eSeschrock } 15799653d4eSeschrock } 15899653d4eSeschrock 15999653d4eSeschrock /*PRINTFLIKE2*/ 160fa9e4066Sahrens void 16199653d4eSeschrock zfs_error_aux(libzfs_handle_t *hdl, const char *fmt, ...) 162fa9e4066Sahrens { 163fa9e4066Sahrens va_list ap; 164fa9e4066Sahrens 165fa9e4066Sahrens va_start(ap, fmt); 166fa9e4066Sahrens 16799653d4eSeschrock (void) vsnprintf(hdl->libzfs_desc, sizeof (hdl->libzfs_desc), 16899653d4eSeschrock fmt, ap); 16999653d4eSeschrock hdl->libzfs_desc_active = 1; 17099653d4eSeschrock 17199653d4eSeschrock va_end(ap); 17299653d4eSeschrock } 17399653d4eSeschrock 17499653d4eSeschrock static void 17599653d4eSeschrock zfs_verror(libzfs_handle_t *hdl, int error, const char *fmt, va_list ap) 17699653d4eSeschrock { 17799653d4eSeschrock (void) vsnprintf(hdl->libzfs_action, sizeof (hdl->libzfs_action), 17899653d4eSeschrock fmt, ap); 17999653d4eSeschrock hdl->libzfs_error = error; 18099653d4eSeschrock 18199653d4eSeschrock if (hdl->libzfs_desc_active) 18299653d4eSeschrock hdl->libzfs_desc_active = 0; 18399653d4eSeschrock else 18499653d4eSeschrock hdl->libzfs_desc[0] = '\0'; 18599653d4eSeschrock 18699653d4eSeschrock if (hdl->libzfs_printerr) { 18799653d4eSeschrock if (error == EZFS_UNKNOWN) { 18899653d4eSeschrock (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "internal " 18999653d4eSeschrock "error: %s\n"), libzfs_error_description(hdl)); 19099653d4eSeschrock abort(); 19199653d4eSeschrock } 19299653d4eSeschrock 19399653d4eSeschrock (void) fprintf(stderr, "%s: %s\n", hdl->libzfs_action, 19499653d4eSeschrock libzfs_error_description(hdl)); 19599653d4eSeschrock if (error == EZFS_NOMEM) 19699653d4eSeschrock exit(1); 197fa9e4066Sahrens } 19899653d4eSeschrock } 19999653d4eSeschrock 20099653d4eSeschrock /*PRINTFLIKE3*/ 20199653d4eSeschrock int 20299653d4eSeschrock zfs_error(libzfs_handle_t *hdl, int error, const char *fmt, ...) 20399653d4eSeschrock { 20499653d4eSeschrock va_list ap; 20599653d4eSeschrock 20699653d4eSeschrock va_start(ap, fmt); 20799653d4eSeschrock 20899653d4eSeschrock zfs_verror(hdl, error, fmt, ap); 209fa9e4066Sahrens 210fa9e4066Sahrens va_end(ap); 21199653d4eSeschrock 21299653d4eSeschrock return (-1); 213fa9e4066Sahrens } 214fa9e4066Sahrens 21599653d4eSeschrock static int 21699653d4eSeschrock zfs_common_error(libzfs_handle_t *hdl, int error, const char *fmt, 21799653d4eSeschrock va_list ap) 21899653d4eSeschrock { 21999653d4eSeschrock switch (error) { 22099653d4eSeschrock case EPERM: 22199653d4eSeschrock case EACCES: 22299653d4eSeschrock zfs_verror(hdl, EZFS_PERM, fmt, ap); 22399653d4eSeschrock return (-1); 22499653d4eSeschrock 22599653d4eSeschrock case EIO: 22699653d4eSeschrock zfs_verror(hdl, EZFS_IO, fmt, ap); 22799653d4eSeschrock return (-1); 22899653d4eSeschrock 22999653d4eSeschrock case EINTR: 23099653d4eSeschrock zfs_verror(hdl, EZFS_INTR, fmt, ap); 23199653d4eSeschrock return (-1); 23299653d4eSeschrock } 23399653d4eSeschrock 23499653d4eSeschrock return (0); 23599653d4eSeschrock } 23699653d4eSeschrock 23799653d4eSeschrock /*PRINTFLIKE3*/ 23899653d4eSeschrock int 23999653d4eSeschrock zfs_standard_error(libzfs_handle_t *hdl, int error, const char *fmt, ...) 240fa9e4066Sahrens { 241fa9e4066Sahrens va_list ap; 242fa9e4066Sahrens 243fa9e4066Sahrens va_start(ap, fmt); 244fa9e4066Sahrens 24599653d4eSeschrock if (zfs_common_error(hdl, error, fmt, ap) != 0) { 24699653d4eSeschrock va_end(ap); 24799653d4eSeschrock return (-1); 248fa9e4066Sahrens } 249fa9e4066Sahrens 250fa9e4066Sahrens 25199653d4eSeschrock switch (error) { 25299653d4eSeschrock case ENXIO: 25399653d4eSeschrock zfs_verror(hdl, EZFS_IO, fmt, ap); 25499653d4eSeschrock break; 25599653d4eSeschrock 25699653d4eSeschrock case ENOENT: 25799653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 25899653d4eSeschrock "dataset does not exist")); 25999653d4eSeschrock zfs_verror(hdl, EZFS_NOENT, fmt, ap); 26099653d4eSeschrock break; 26199653d4eSeschrock 26299653d4eSeschrock case ENOSPC: 26399653d4eSeschrock case EDQUOT: 26499653d4eSeschrock zfs_verror(hdl, EZFS_NOSPC, fmt, ap); 26599653d4eSeschrock return (-1); 26699653d4eSeschrock 26799653d4eSeschrock case EEXIST: 26899653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 26999653d4eSeschrock "dataset already exists")); 27099653d4eSeschrock zfs_verror(hdl, EZFS_EXISTS, fmt, ap); 27199653d4eSeschrock break; 27299653d4eSeschrock 27399653d4eSeschrock case EBUSY: 27499653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 27599653d4eSeschrock "dataset is busy")); 27699653d4eSeschrock zfs_verror(hdl, EZFS_BUSY, fmt, ap); 27799653d4eSeschrock break; 27899653d4eSeschrock 27999653d4eSeschrock default: 28099653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 28199653d4eSeschrock zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap); 28299653d4eSeschrock break; 28399653d4eSeschrock } 28499653d4eSeschrock 28599653d4eSeschrock va_end(ap); 28699653d4eSeschrock return (-1); 287fa9e4066Sahrens } 288fa9e4066Sahrens 28999653d4eSeschrock /*PRINTFLIKE3*/ 29099653d4eSeschrock int 29199653d4eSeschrock zpool_standard_error(libzfs_handle_t *hdl, int error, const char *fmt, ...) 292fa9e4066Sahrens { 29399653d4eSeschrock va_list ap; 29499653d4eSeschrock 29599653d4eSeschrock va_start(ap, fmt); 29699653d4eSeschrock 29799653d4eSeschrock if (zfs_common_error(hdl, error, fmt, ap) != 0) { 29899653d4eSeschrock va_end(ap); 29999653d4eSeschrock return (-1); 30099653d4eSeschrock } 30199653d4eSeschrock 30299653d4eSeschrock switch (error) { 30399653d4eSeschrock case ENODEV: 30499653d4eSeschrock zfs_verror(hdl, EZFS_NODEVICE, fmt, ap); 30599653d4eSeschrock break; 30699653d4eSeschrock 30799653d4eSeschrock case ENOENT: 30899653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "no such pool")); 30999653d4eSeschrock zfs_verror(hdl, EZFS_NOENT, fmt, ap); 31099653d4eSeschrock break; 31199653d4eSeschrock 31299653d4eSeschrock case EEXIST: 31399653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 31499653d4eSeschrock "pool already exists")); 31599653d4eSeschrock zfs_verror(hdl, EZFS_EXISTS, fmt, ap); 31699653d4eSeschrock break; 31799653d4eSeschrock 31899653d4eSeschrock case EBUSY: 31999653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool is busy")); 32099653d4eSeschrock zfs_verror(hdl, EZFS_EXISTS, fmt, ap); 32199653d4eSeschrock break; 32299653d4eSeschrock 32399653d4eSeschrock case ENXIO: 32499653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 32599653d4eSeschrock "one or more devices is currently unavailable")); 32699653d4eSeschrock zfs_verror(hdl, EZFS_BADDEV, fmt, ap); 32799653d4eSeschrock break; 32899653d4eSeschrock 32999653d4eSeschrock case ENAMETOOLONG: 33099653d4eSeschrock zfs_verror(hdl, EZFS_DEVOVERFLOW, fmt, ap); 33199653d4eSeschrock break; 33299653d4eSeschrock 33399653d4eSeschrock default: 33499653d4eSeschrock zfs_error_aux(hdl, strerror(error)); 33599653d4eSeschrock zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap); 33699653d4eSeschrock } 33799653d4eSeschrock 33899653d4eSeschrock va_end(ap); 33999653d4eSeschrock return (-1); 340fa9e4066Sahrens } 341fa9e4066Sahrens 342fa9e4066Sahrens /* 343fa9e4066Sahrens * Display an out of memory error message and abort the current program. 344fa9e4066Sahrens */ 34599653d4eSeschrock int 34699653d4eSeschrock no_memory(libzfs_handle_t *hdl) 347fa9e4066Sahrens { 34899653d4eSeschrock return (zfs_error(hdl, EZFS_NOMEM, "internal error")); 349fa9e4066Sahrens } 350fa9e4066Sahrens 351fa9e4066Sahrens /* 352fa9e4066Sahrens * A safe form of malloc() which will die if the allocation fails. 353fa9e4066Sahrens */ 354fa9e4066Sahrens void * 35599653d4eSeschrock zfs_alloc(libzfs_handle_t *hdl, size_t size) 356fa9e4066Sahrens { 357fa9e4066Sahrens void *data; 358fa9e4066Sahrens 359fa9e4066Sahrens if ((data = calloc(1, size)) == NULL) 36099653d4eSeschrock (void) no_memory(hdl); 361fa9e4066Sahrens 362fa9e4066Sahrens return (data); 363fa9e4066Sahrens } 364fa9e4066Sahrens 365*e9dbad6fSeschrock /* 366*e9dbad6fSeschrock * A safe form of realloc(), which also zeroes newly allocated space. 367*e9dbad6fSeschrock */ 368*e9dbad6fSeschrock void * 369*e9dbad6fSeschrock zfs_realloc(libzfs_handle_t *hdl, void *ptr, size_t oldsize, size_t newsize) 370*e9dbad6fSeschrock { 371*e9dbad6fSeschrock void *ret; 372*e9dbad6fSeschrock 373*e9dbad6fSeschrock if ((ret = realloc(ptr, newsize)) == NULL) { 374*e9dbad6fSeschrock (void) no_memory(hdl); 375*e9dbad6fSeschrock free(ptr); 376*e9dbad6fSeschrock return (NULL); 377*e9dbad6fSeschrock } 378*e9dbad6fSeschrock 379*e9dbad6fSeschrock bzero((char *)ret + oldsize, (newsize - oldsize)); 380*e9dbad6fSeschrock return (ret); 381*e9dbad6fSeschrock } 382*e9dbad6fSeschrock 383fa9e4066Sahrens /* 384fa9e4066Sahrens * A safe form of strdup() which will die if the allocation fails. 385fa9e4066Sahrens */ 386fa9e4066Sahrens char * 38799653d4eSeschrock zfs_strdup(libzfs_handle_t *hdl, const char *str) 388fa9e4066Sahrens { 389fa9e4066Sahrens char *ret; 390fa9e4066Sahrens 391fa9e4066Sahrens if ((ret = strdup(str)) == NULL) 39299653d4eSeschrock (void) no_memory(hdl); 393fa9e4066Sahrens 394fa9e4066Sahrens return (ret); 395fa9e4066Sahrens } 396fa9e4066Sahrens 397fa9e4066Sahrens /* 398fa9e4066Sahrens * Convert a number to an appropriately human-readable output. 399fa9e4066Sahrens */ 400fa9e4066Sahrens void 401fa9e4066Sahrens zfs_nicenum(uint64_t num, char *buf, size_t buflen) 402fa9e4066Sahrens { 403fa9e4066Sahrens uint64_t n = num; 404fa9e4066Sahrens int index = 0; 405fa9e4066Sahrens char u; 406fa9e4066Sahrens 407fa9e4066Sahrens while (n >= 1024) { 4085c709891Seschrock n /= 1024; 409fa9e4066Sahrens index++; 410fa9e4066Sahrens } 411fa9e4066Sahrens 412fa9e4066Sahrens u = " KMGTPE"[index]; 413fa9e4066Sahrens 4145c709891Seschrock if (index == 0) { 415fa9e4066Sahrens (void) snprintf(buf, buflen, "%llu", n); 4165c709891Seschrock } else if ((num & ((1ULL << 10 * index) - 1)) == 0) { 4175c709891Seschrock /* 4185c709891Seschrock * If this is an even multiple of the base, always display 4195c709891Seschrock * without any decimal precision. 4205c709891Seschrock */ 421fa9e4066Sahrens (void) snprintf(buf, buflen, "%llu%c", n, u); 4225c709891Seschrock } else { 4235c709891Seschrock /* 4245c709891Seschrock * We want to choose a precision that reflects the best choice 4255c709891Seschrock * for fitting in 5 characters. This can get rather tricky when 4265c709891Seschrock * we have numbers that are very close to an order of magnitude. 4275c709891Seschrock * For example, when displaying 10239 (which is really 9.999K), 4285c709891Seschrock * we want only a single place of precision for 10.0K. We could 4295c709891Seschrock * develop some complex heuristics for this, but it's much 4305c709891Seschrock * easier just to try each combination in turn. 4315c709891Seschrock */ 4325c709891Seschrock int i; 4335c709891Seschrock for (i = 2; i >= 0; i--) { 4345c709891Seschrock (void) snprintf(buf, buflen, "%.*f%c", i, 4355c709891Seschrock (double)num / (1ULL << 10 * index), u); 4365c709891Seschrock if (strlen(buf) <= 5) 4375c709891Seschrock break; 4385c709891Seschrock } 4395c709891Seschrock } 440fa9e4066Sahrens } 44199653d4eSeschrock 44299653d4eSeschrock void 44399653d4eSeschrock libzfs_print_on_error(libzfs_handle_t *hdl, boolean_t printerr) 44499653d4eSeschrock { 44599653d4eSeschrock hdl->libzfs_printerr = printerr; 44699653d4eSeschrock } 44799653d4eSeschrock 44899653d4eSeschrock libzfs_handle_t * 44999653d4eSeschrock libzfs_init(void) 45099653d4eSeschrock { 45199653d4eSeschrock libzfs_handle_t *hdl; 45299653d4eSeschrock 45399653d4eSeschrock if ((hdl = calloc(sizeof (libzfs_handle_t), 1)) == NULL) { 45499653d4eSeschrock return (NULL); 45599653d4eSeschrock } 45699653d4eSeschrock 457c08432ebSeschrock if ((hdl->libzfs_fd = open(ZFS_DEV, O_RDWR)) < 0) { 45899653d4eSeschrock free(hdl); 45999653d4eSeschrock return (NULL); 46099653d4eSeschrock } 46199653d4eSeschrock 46299653d4eSeschrock if ((hdl->libzfs_mnttab = fopen(MNTTAB, "r")) == NULL) { 46399653d4eSeschrock (void) close(hdl->libzfs_fd); 46499653d4eSeschrock free(hdl); 46599653d4eSeschrock return (NULL); 46699653d4eSeschrock } 46799653d4eSeschrock 46899653d4eSeschrock hdl->libzfs_sharetab = fopen("/etc/dfs/sharetab", "r"); 46999653d4eSeschrock 47099653d4eSeschrock return (hdl); 47199653d4eSeschrock } 47299653d4eSeschrock 47399653d4eSeschrock void 47499653d4eSeschrock libzfs_fini(libzfs_handle_t *hdl) 47599653d4eSeschrock { 47699653d4eSeschrock (void) close(hdl->libzfs_fd); 47799653d4eSeschrock if (hdl->libzfs_mnttab) 47899653d4eSeschrock (void) fclose(hdl->libzfs_mnttab); 47999653d4eSeschrock if (hdl->libzfs_sharetab) 48099653d4eSeschrock (void) fclose(hdl->libzfs_sharetab); 48199653d4eSeschrock namespace_clear(hdl); 48299653d4eSeschrock free(hdl); 48399653d4eSeschrock } 48499653d4eSeschrock 48599653d4eSeschrock libzfs_handle_t * 48699653d4eSeschrock zpool_get_handle(zpool_handle_t *zhp) 48799653d4eSeschrock { 48899653d4eSeschrock return (zhp->zpool_hdl); 48999653d4eSeschrock } 49099653d4eSeschrock 49199653d4eSeschrock libzfs_handle_t * 49299653d4eSeschrock zfs_get_handle(zfs_handle_t *zhp) 49399653d4eSeschrock { 49499653d4eSeschrock return (zhp->zfs_hdl); 49599653d4eSeschrock } 496*e9dbad6fSeschrock 497*e9dbad6fSeschrock /* 498*e9dbad6fSeschrock * Initialize the zc_nvlist_dst member to prepare for receiving an nvlist from 499*e9dbad6fSeschrock * an ioctl(). 500*e9dbad6fSeschrock */ 501*e9dbad6fSeschrock int 502*e9dbad6fSeschrock zcmd_alloc_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, size_t len) 503*e9dbad6fSeschrock { 504*e9dbad6fSeschrock if (len == 0) 505*e9dbad6fSeschrock len = 1024; 506*e9dbad6fSeschrock zc->zc_nvlist_dst_size = len; 507*e9dbad6fSeschrock if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t) 508*e9dbad6fSeschrock zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == NULL) 509*e9dbad6fSeschrock return (-1); 510*e9dbad6fSeschrock 511*e9dbad6fSeschrock return (0); 512*e9dbad6fSeschrock } 513*e9dbad6fSeschrock 514*e9dbad6fSeschrock /* 515*e9dbad6fSeschrock * Called when an ioctl() which returns an nvlist fails with ENOMEM. This will 516*e9dbad6fSeschrock * expand the nvlist to the size specified in 'zc_nvlist_dst_size', which was 517*e9dbad6fSeschrock * filled in by the kernel to indicate the actual required size. 518*e9dbad6fSeschrock */ 519*e9dbad6fSeschrock int 520*e9dbad6fSeschrock zcmd_expand_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc) 521*e9dbad6fSeschrock { 522*e9dbad6fSeschrock free((void *)(uintptr_t)zc->zc_nvlist_dst); 523*e9dbad6fSeschrock if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t) 524*e9dbad6fSeschrock zfs_alloc(hdl, zc->zc_nvlist_dst_size)) 525*e9dbad6fSeschrock == NULL) 526*e9dbad6fSeschrock return (-1); 527*e9dbad6fSeschrock 528*e9dbad6fSeschrock return (0); 529*e9dbad6fSeschrock } 530*e9dbad6fSeschrock 531*e9dbad6fSeschrock /* 532*e9dbad6fSeschrock * Called to free the destination nvlist stored in the command structure. This 533*e9dbad6fSeschrock * is only needed if the caller must abort abnormally. The various other 534*e9dbad6fSeschrock * zcmd_*() routines will free it on failure (or on success, for 535*e9dbad6fSeschrock * zcmd_read_nvlist). 536*e9dbad6fSeschrock */ 537*e9dbad6fSeschrock void 538*e9dbad6fSeschrock zcmd_free_nvlists(zfs_cmd_t *zc) 539*e9dbad6fSeschrock { 540*e9dbad6fSeschrock free((void *)(uintptr_t)zc->zc_nvlist_src); 541*e9dbad6fSeschrock free((void *)(uintptr_t)zc->zc_nvlist_dst); 542*e9dbad6fSeschrock } 543*e9dbad6fSeschrock 544*e9dbad6fSeschrock int 545*e9dbad6fSeschrock zcmd_write_src_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t *nvl, 546*e9dbad6fSeschrock size_t *size) 547*e9dbad6fSeschrock { 548*e9dbad6fSeschrock char *packed; 549*e9dbad6fSeschrock size_t len; 550*e9dbad6fSeschrock 551*e9dbad6fSeschrock verify(nvlist_size(nvl, &len, NV_ENCODE_NATIVE) == 0); 552*e9dbad6fSeschrock 553*e9dbad6fSeschrock if ((packed = zfs_alloc(hdl, len)) == NULL) 554*e9dbad6fSeschrock return (-1); 555*e9dbad6fSeschrock 556*e9dbad6fSeschrock verify(nvlist_pack(nvl, &packed, &len, NV_ENCODE_NATIVE, 0) == 0); 557*e9dbad6fSeschrock 558*e9dbad6fSeschrock zc->zc_nvlist_src = (uint64_t)(uintptr_t)packed; 559*e9dbad6fSeschrock zc->zc_nvlist_src_size = len; 560*e9dbad6fSeschrock 561*e9dbad6fSeschrock if (size) 562*e9dbad6fSeschrock *size = len; 563*e9dbad6fSeschrock return (0); 564*e9dbad6fSeschrock } 565*e9dbad6fSeschrock 566*e9dbad6fSeschrock /* 567*e9dbad6fSeschrock * Unpacks an nvlist from the ZFS ioctl command structure. 568*e9dbad6fSeschrock */ 569*e9dbad6fSeschrock int 570*e9dbad6fSeschrock zcmd_read_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t **nvlp) 571*e9dbad6fSeschrock { 572*e9dbad6fSeschrock if (nvlist_unpack((void *)(uintptr_t)zc->zc_nvlist_dst, 573*e9dbad6fSeschrock zc->zc_nvlist_dst_size, nvlp, 0) != 0) 574*e9dbad6fSeschrock return (no_memory(hdl)); 575*e9dbad6fSeschrock 576*e9dbad6fSeschrock return (0); 577*e9dbad6fSeschrock } 578