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")); 151*06eeb2adSek case EZFS_NOHISTORY: 152*06eeb2adSek return (dgettext(TEXT_DOMAIN, "no history available")); 15399653d4eSeschrock case EZFS_UNKNOWN: 15499653d4eSeschrock return (dgettext(TEXT_DOMAIN, "unknown error")); 15599653d4eSeschrock default: 156c08432ebSeschrock assert(hdl->libzfs_error == 0); 157c08432ebSeschrock return (dgettext(TEXT_DOMAIN, "no error")); 15899653d4eSeschrock } 15999653d4eSeschrock } 16099653d4eSeschrock 16199653d4eSeschrock /*PRINTFLIKE2*/ 162fa9e4066Sahrens void 16399653d4eSeschrock zfs_error_aux(libzfs_handle_t *hdl, const char *fmt, ...) 164fa9e4066Sahrens { 165fa9e4066Sahrens va_list ap; 166fa9e4066Sahrens 167fa9e4066Sahrens va_start(ap, fmt); 168fa9e4066Sahrens 16999653d4eSeschrock (void) vsnprintf(hdl->libzfs_desc, sizeof (hdl->libzfs_desc), 17099653d4eSeschrock fmt, ap); 17199653d4eSeschrock hdl->libzfs_desc_active = 1; 17299653d4eSeschrock 17399653d4eSeschrock va_end(ap); 17499653d4eSeschrock } 17599653d4eSeschrock 17699653d4eSeschrock static void 17799653d4eSeschrock zfs_verror(libzfs_handle_t *hdl, int error, const char *fmt, va_list ap) 17899653d4eSeschrock { 17999653d4eSeschrock (void) vsnprintf(hdl->libzfs_action, sizeof (hdl->libzfs_action), 18099653d4eSeschrock fmt, ap); 18199653d4eSeschrock hdl->libzfs_error = error; 18299653d4eSeschrock 18399653d4eSeschrock if (hdl->libzfs_desc_active) 18499653d4eSeschrock hdl->libzfs_desc_active = 0; 18599653d4eSeschrock else 18699653d4eSeschrock hdl->libzfs_desc[0] = '\0'; 18799653d4eSeschrock 18899653d4eSeschrock if (hdl->libzfs_printerr) { 18999653d4eSeschrock if (error == EZFS_UNKNOWN) { 19099653d4eSeschrock (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "internal " 19199653d4eSeschrock "error: %s\n"), libzfs_error_description(hdl)); 19299653d4eSeschrock abort(); 19399653d4eSeschrock } 19499653d4eSeschrock 19599653d4eSeschrock (void) fprintf(stderr, "%s: %s\n", hdl->libzfs_action, 19699653d4eSeschrock libzfs_error_description(hdl)); 19799653d4eSeschrock if (error == EZFS_NOMEM) 19899653d4eSeschrock exit(1); 199fa9e4066Sahrens } 20099653d4eSeschrock } 20199653d4eSeschrock 20299653d4eSeschrock /*PRINTFLIKE3*/ 20399653d4eSeschrock int 20499653d4eSeschrock zfs_error(libzfs_handle_t *hdl, int error, const char *fmt, ...) 20599653d4eSeschrock { 20699653d4eSeschrock va_list ap; 20799653d4eSeschrock 20899653d4eSeschrock va_start(ap, fmt); 20999653d4eSeschrock 21099653d4eSeschrock zfs_verror(hdl, error, fmt, ap); 211fa9e4066Sahrens 212fa9e4066Sahrens va_end(ap); 21399653d4eSeschrock 21499653d4eSeschrock return (-1); 215fa9e4066Sahrens } 216fa9e4066Sahrens 21799653d4eSeschrock static int 21899653d4eSeschrock zfs_common_error(libzfs_handle_t *hdl, int error, const char *fmt, 21999653d4eSeschrock va_list ap) 22099653d4eSeschrock { 22199653d4eSeschrock switch (error) { 22299653d4eSeschrock case EPERM: 22399653d4eSeschrock case EACCES: 22499653d4eSeschrock zfs_verror(hdl, EZFS_PERM, fmt, ap); 22599653d4eSeschrock return (-1); 22699653d4eSeschrock 22799653d4eSeschrock case EIO: 22899653d4eSeschrock zfs_verror(hdl, EZFS_IO, fmt, ap); 22999653d4eSeschrock return (-1); 23099653d4eSeschrock 23199653d4eSeschrock case EINTR: 23299653d4eSeschrock zfs_verror(hdl, EZFS_INTR, fmt, ap); 23399653d4eSeschrock return (-1); 23499653d4eSeschrock } 23599653d4eSeschrock 23699653d4eSeschrock return (0); 23799653d4eSeschrock } 23899653d4eSeschrock 23999653d4eSeschrock /*PRINTFLIKE3*/ 24099653d4eSeschrock int 24199653d4eSeschrock zfs_standard_error(libzfs_handle_t *hdl, int error, const char *fmt, ...) 242fa9e4066Sahrens { 243fa9e4066Sahrens va_list ap; 244fa9e4066Sahrens 245fa9e4066Sahrens va_start(ap, fmt); 246fa9e4066Sahrens 24799653d4eSeschrock if (zfs_common_error(hdl, error, fmt, ap) != 0) { 24899653d4eSeschrock va_end(ap); 24999653d4eSeschrock return (-1); 250fa9e4066Sahrens } 251fa9e4066Sahrens 252fa9e4066Sahrens 25399653d4eSeschrock switch (error) { 25499653d4eSeschrock case ENXIO: 25599653d4eSeschrock zfs_verror(hdl, EZFS_IO, fmt, ap); 25699653d4eSeschrock break; 25799653d4eSeschrock 25899653d4eSeschrock case ENOENT: 25999653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 26099653d4eSeschrock "dataset does not exist")); 26199653d4eSeschrock zfs_verror(hdl, EZFS_NOENT, fmt, ap); 26299653d4eSeschrock break; 26399653d4eSeschrock 26499653d4eSeschrock case ENOSPC: 26599653d4eSeschrock case EDQUOT: 26699653d4eSeschrock zfs_verror(hdl, EZFS_NOSPC, fmt, ap); 26799653d4eSeschrock return (-1); 26899653d4eSeschrock 26999653d4eSeschrock case EEXIST: 27099653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 27199653d4eSeschrock "dataset already exists")); 27299653d4eSeschrock zfs_verror(hdl, EZFS_EXISTS, fmt, ap); 27399653d4eSeschrock break; 27499653d4eSeschrock 27599653d4eSeschrock case EBUSY: 27699653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 27799653d4eSeschrock "dataset is busy")); 27899653d4eSeschrock zfs_verror(hdl, EZFS_BUSY, fmt, ap); 27999653d4eSeschrock break; 28099653d4eSeschrock 28199653d4eSeschrock default: 28299653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 28399653d4eSeschrock zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap); 28499653d4eSeschrock break; 28599653d4eSeschrock } 28699653d4eSeschrock 28799653d4eSeschrock va_end(ap); 28899653d4eSeschrock return (-1); 289fa9e4066Sahrens } 290fa9e4066Sahrens 29199653d4eSeschrock /*PRINTFLIKE3*/ 29299653d4eSeschrock int 29399653d4eSeschrock zpool_standard_error(libzfs_handle_t *hdl, int error, const char *fmt, ...) 294fa9e4066Sahrens { 29599653d4eSeschrock va_list ap; 29699653d4eSeschrock 29799653d4eSeschrock va_start(ap, fmt); 29899653d4eSeschrock 29999653d4eSeschrock if (zfs_common_error(hdl, error, fmt, ap) != 0) { 30099653d4eSeschrock va_end(ap); 30199653d4eSeschrock return (-1); 30299653d4eSeschrock } 30399653d4eSeschrock 30499653d4eSeschrock switch (error) { 30599653d4eSeschrock case ENODEV: 30699653d4eSeschrock zfs_verror(hdl, EZFS_NODEVICE, fmt, ap); 30799653d4eSeschrock break; 30899653d4eSeschrock 30999653d4eSeschrock case ENOENT: 31099653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "no such pool")); 31199653d4eSeschrock zfs_verror(hdl, EZFS_NOENT, fmt, ap); 31299653d4eSeschrock break; 31399653d4eSeschrock 31499653d4eSeschrock case EEXIST: 31599653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 31699653d4eSeschrock "pool already exists")); 31799653d4eSeschrock zfs_verror(hdl, EZFS_EXISTS, fmt, ap); 31899653d4eSeschrock break; 31999653d4eSeschrock 32099653d4eSeschrock case EBUSY: 32199653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool is busy")); 32299653d4eSeschrock zfs_verror(hdl, EZFS_EXISTS, fmt, ap); 32399653d4eSeschrock break; 32499653d4eSeschrock 32599653d4eSeschrock case ENXIO: 32699653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 32799653d4eSeschrock "one or more devices is currently unavailable")); 32899653d4eSeschrock zfs_verror(hdl, EZFS_BADDEV, fmt, ap); 32999653d4eSeschrock break; 33099653d4eSeschrock 33199653d4eSeschrock case ENAMETOOLONG: 33299653d4eSeschrock zfs_verror(hdl, EZFS_DEVOVERFLOW, fmt, ap); 33399653d4eSeschrock break; 33499653d4eSeschrock 33599653d4eSeschrock default: 33699653d4eSeschrock zfs_error_aux(hdl, strerror(error)); 33799653d4eSeschrock zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap); 33899653d4eSeschrock } 33999653d4eSeschrock 34099653d4eSeschrock va_end(ap); 34199653d4eSeschrock return (-1); 342fa9e4066Sahrens } 343fa9e4066Sahrens 344fa9e4066Sahrens /* 345fa9e4066Sahrens * Display an out of memory error message and abort the current program. 346fa9e4066Sahrens */ 34799653d4eSeschrock int 34899653d4eSeschrock no_memory(libzfs_handle_t *hdl) 349fa9e4066Sahrens { 35099653d4eSeschrock return (zfs_error(hdl, EZFS_NOMEM, "internal error")); 351fa9e4066Sahrens } 352fa9e4066Sahrens 353fa9e4066Sahrens /* 354fa9e4066Sahrens * A safe form of malloc() which will die if the allocation fails. 355fa9e4066Sahrens */ 356fa9e4066Sahrens void * 35799653d4eSeschrock zfs_alloc(libzfs_handle_t *hdl, size_t size) 358fa9e4066Sahrens { 359fa9e4066Sahrens void *data; 360fa9e4066Sahrens 361fa9e4066Sahrens if ((data = calloc(1, size)) == NULL) 36299653d4eSeschrock (void) no_memory(hdl); 363fa9e4066Sahrens 364fa9e4066Sahrens return (data); 365fa9e4066Sahrens } 366fa9e4066Sahrens 367e9dbad6fSeschrock /* 368e9dbad6fSeschrock * A safe form of realloc(), which also zeroes newly allocated space. 369e9dbad6fSeschrock */ 370e9dbad6fSeschrock void * 371e9dbad6fSeschrock zfs_realloc(libzfs_handle_t *hdl, void *ptr, size_t oldsize, size_t newsize) 372e9dbad6fSeschrock { 373e9dbad6fSeschrock void *ret; 374e9dbad6fSeschrock 375e9dbad6fSeschrock if ((ret = realloc(ptr, newsize)) == NULL) { 376e9dbad6fSeschrock (void) no_memory(hdl); 377e9dbad6fSeschrock free(ptr); 378e9dbad6fSeschrock return (NULL); 379e9dbad6fSeschrock } 380e9dbad6fSeschrock 381e9dbad6fSeschrock bzero((char *)ret + oldsize, (newsize - oldsize)); 382e9dbad6fSeschrock return (ret); 383e9dbad6fSeschrock } 384e9dbad6fSeschrock 385fa9e4066Sahrens /* 386fa9e4066Sahrens * A safe form of strdup() which will die if the allocation fails. 387fa9e4066Sahrens */ 388fa9e4066Sahrens char * 38999653d4eSeschrock zfs_strdup(libzfs_handle_t *hdl, const char *str) 390fa9e4066Sahrens { 391fa9e4066Sahrens char *ret; 392fa9e4066Sahrens 393fa9e4066Sahrens if ((ret = strdup(str)) == NULL) 39499653d4eSeschrock (void) no_memory(hdl); 395fa9e4066Sahrens 396fa9e4066Sahrens return (ret); 397fa9e4066Sahrens } 398fa9e4066Sahrens 399fa9e4066Sahrens /* 400fa9e4066Sahrens * Convert a number to an appropriately human-readable output. 401fa9e4066Sahrens */ 402fa9e4066Sahrens void 403fa9e4066Sahrens zfs_nicenum(uint64_t num, char *buf, size_t buflen) 404fa9e4066Sahrens { 405fa9e4066Sahrens uint64_t n = num; 406fa9e4066Sahrens int index = 0; 407fa9e4066Sahrens char u; 408fa9e4066Sahrens 409fa9e4066Sahrens while (n >= 1024) { 4105c709891Seschrock n /= 1024; 411fa9e4066Sahrens index++; 412fa9e4066Sahrens } 413fa9e4066Sahrens 414fa9e4066Sahrens u = " KMGTPE"[index]; 415fa9e4066Sahrens 4165c709891Seschrock if (index == 0) { 417fa9e4066Sahrens (void) snprintf(buf, buflen, "%llu", n); 4185c709891Seschrock } else if ((num & ((1ULL << 10 * index) - 1)) == 0) { 4195c709891Seschrock /* 4205c709891Seschrock * If this is an even multiple of the base, always display 4215c709891Seschrock * without any decimal precision. 4225c709891Seschrock */ 423fa9e4066Sahrens (void) snprintf(buf, buflen, "%llu%c", n, u); 4245c709891Seschrock } else { 4255c709891Seschrock /* 4265c709891Seschrock * We want to choose a precision that reflects the best choice 4275c709891Seschrock * for fitting in 5 characters. This can get rather tricky when 4285c709891Seschrock * we have numbers that are very close to an order of magnitude. 4295c709891Seschrock * For example, when displaying 10239 (which is really 9.999K), 4305c709891Seschrock * we want only a single place of precision for 10.0K. We could 4315c709891Seschrock * develop some complex heuristics for this, but it's much 4325c709891Seschrock * easier just to try each combination in turn. 4335c709891Seschrock */ 4345c709891Seschrock int i; 4355c709891Seschrock for (i = 2; i >= 0; i--) { 4365c709891Seschrock (void) snprintf(buf, buflen, "%.*f%c", i, 4375c709891Seschrock (double)num / (1ULL << 10 * index), u); 4385c709891Seschrock if (strlen(buf) <= 5) 4395c709891Seschrock break; 4405c709891Seschrock } 4415c709891Seschrock } 442fa9e4066Sahrens } 44399653d4eSeschrock 44499653d4eSeschrock void 44599653d4eSeschrock libzfs_print_on_error(libzfs_handle_t *hdl, boolean_t printerr) 44699653d4eSeschrock { 44799653d4eSeschrock hdl->libzfs_printerr = printerr; 44899653d4eSeschrock } 44999653d4eSeschrock 45099653d4eSeschrock libzfs_handle_t * 45199653d4eSeschrock libzfs_init(void) 45299653d4eSeschrock { 45399653d4eSeschrock libzfs_handle_t *hdl; 45499653d4eSeschrock 45599653d4eSeschrock if ((hdl = calloc(sizeof (libzfs_handle_t), 1)) == NULL) { 45699653d4eSeschrock return (NULL); 45799653d4eSeschrock } 45899653d4eSeschrock 459c08432ebSeschrock if ((hdl->libzfs_fd = open(ZFS_DEV, O_RDWR)) < 0) { 46099653d4eSeschrock free(hdl); 46199653d4eSeschrock return (NULL); 46299653d4eSeschrock } 46399653d4eSeschrock 46499653d4eSeschrock if ((hdl->libzfs_mnttab = fopen(MNTTAB, "r")) == NULL) { 46599653d4eSeschrock (void) close(hdl->libzfs_fd); 46699653d4eSeschrock free(hdl); 46799653d4eSeschrock return (NULL); 46899653d4eSeschrock } 46999653d4eSeschrock 47099653d4eSeschrock hdl->libzfs_sharetab = fopen("/etc/dfs/sharetab", "r"); 47199653d4eSeschrock 47299653d4eSeschrock return (hdl); 47399653d4eSeschrock } 47499653d4eSeschrock 47599653d4eSeschrock void 47699653d4eSeschrock libzfs_fini(libzfs_handle_t *hdl) 47799653d4eSeschrock { 47899653d4eSeschrock (void) close(hdl->libzfs_fd); 47999653d4eSeschrock if (hdl->libzfs_mnttab) 48099653d4eSeschrock (void) fclose(hdl->libzfs_mnttab); 48199653d4eSeschrock if (hdl->libzfs_sharetab) 48299653d4eSeschrock (void) fclose(hdl->libzfs_sharetab); 48399653d4eSeschrock namespace_clear(hdl); 48499653d4eSeschrock free(hdl); 48599653d4eSeschrock } 48699653d4eSeschrock 48799653d4eSeschrock libzfs_handle_t * 48899653d4eSeschrock zpool_get_handle(zpool_handle_t *zhp) 48999653d4eSeschrock { 49099653d4eSeschrock return (zhp->zpool_hdl); 49199653d4eSeschrock } 49299653d4eSeschrock 49399653d4eSeschrock libzfs_handle_t * 49499653d4eSeschrock zfs_get_handle(zfs_handle_t *zhp) 49599653d4eSeschrock { 49699653d4eSeschrock return (zhp->zfs_hdl); 49799653d4eSeschrock } 498e9dbad6fSeschrock 499e9dbad6fSeschrock /* 500e9dbad6fSeschrock * Initialize the zc_nvlist_dst member to prepare for receiving an nvlist from 501e9dbad6fSeschrock * an ioctl(). 502e9dbad6fSeschrock */ 503e9dbad6fSeschrock int 504e9dbad6fSeschrock zcmd_alloc_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, size_t len) 505e9dbad6fSeschrock { 506e9dbad6fSeschrock if (len == 0) 507a2eea2e1Sahrens len = 2048; 508e9dbad6fSeschrock zc->zc_nvlist_dst_size = len; 509e9dbad6fSeschrock if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t) 510e9dbad6fSeschrock zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == NULL) 511e9dbad6fSeschrock return (-1); 512e9dbad6fSeschrock 513e9dbad6fSeschrock return (0); 514e9dbad6fSeschrock } 515e9dbad6fSeschrock 516e9dbad6fSeschrock /* 517e9dbad6fSeschrock * Called when an ioctl() which returns an nvlist fails with ENOMEM. This will 518e9dbad6fSeschrock * expand the nvlist to the size specified in 'zc_nvlist_dst_size', which was 519e9dbad6fSeschrock * filled in by the kernel to indicate the actual required size. 520e9dbad6fSeschrock */ 521e9dbad6fSeschrock int 522e9dbad6fSeschrock zcmd_expand_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc) 523e9dbad6fSeschrock { 524e9dbad6fSeschrock free((void *)(uintptr_t)zc->zc_nvlist_dst); 525e9dbad6fSeschrock if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t) 526e9dbad6fSeschrock zfs_alloc(hdl, zc->zc_nvlist_dst_size)) 527e9dbad6fSeschrock == NULL) 528e9dbad6fSeschrock return (-1); 529e9dbad6fSeschrock 530e9dbad6fSeschrock return (0); 531e9dbad6fSeschrock } 532e9dbad6fSeschrock 533e9dbad6fSeschrock /* 534a2eea2e1Sahrens * Called to free the src and dst nvlists stored in the command structure. 535e9dbad6fSeschrock */ 536e9dbad6fSeschrock void 537e9dbad6fSeschrock zcmd_free_nvlists(zfs_cmd_t *zc) 538e9dbad6fSeschrock { 539e9dbad6fSeschrock free((void *)(uintptr_t)zc->zc_nvlist_src); 540e9dbad6fSeschrock free((void *)(uintptr_t)zc->zc_nvlist_dst); 541e9dbad6fSeschrock } 542e9dbad6fSeschrock 543e9dbad6fSeschrock int 544e9dbad6fSeschrock zcmd_write_src_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t *nvl, 545e9dbad6fSeschrock size_t *size) 546e9dbad6fSeschrock { 547e9dbad6fSeschrock char *packed; 548e9dbad6fSeschrock size_t len; 549e9dbad6fSeschrock 550e9dbad6fSeschrock verify(nvlist_size(nvl, &len, NV_ENCODE_NATIVE) == 0); 551e9dbad6fSeschrock 552e9dbad6fSeschrock if ((packed = zfs_alloc(hdl, len)) == NULL) 553e9dbad6fSeschrock return (-1); 554e9dbad6fSeschrock 555e9dbad6fSeschrock verify(nvlist_pack(nvl, &packed, &len, NV_ENCODE_NATIVE, 0) == 0); 556e9dbad6fSeschrock 557e9dbad6fSeschrock zc->zc_nvlist_src = (uint64_t)(uintptr_t)packed; 558e9dbad6fSeschrock zc->zc_nvlist_src_size = len; 559e9dbad6fSeschrock 560e9dbad6fSeschrock if (size) 561e9dbad6fSeschrock *size = len; 562e9dbad6fSeschrock return (0); 563e9dbad6fSeschrock } 564e9dbad6fSeschrock 565e9dbad6fSeschrock /* 566e9dbad6fSeschrock * Unpacks an nvlist from the ZFS ioctl command structure. 567e9dbad6fSeschrock */ 568e9dbad6fSeschrock int 569e9dbad6fSeschrock zcmd_read_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t **nvlp) 570e9dbad6fSeschrock { 571e9dbad6fSeschrock if (nvlist_unpack((void *)(uintptr_t)zc->zc_nvlist_dst, 572e9dbad6fSeschrock zc->zc_nvlist_dst_size, nvlp, 0) != 0) 573e9dbad6fSeschrock return (no_memory(hdl)); 574e9dbad6fSeschrock 575e9dbad6fSeschrock return (0); 576e9dbad6fSeschrock } 577