1da6c28aaSamw /* 2da6c28aaSamw * CDDL HEADER START 3da6c28aaSamw * 4da6c28aaSamw * The contents of this file are subject to the terms of the 5da6c28aaSamw * Common Development and Distribution License (the "License"). 6da6c28aaSamw * You may not use this file except in compliance with the License. 7da6c28aaSamw * 8da6c28aaSamw * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9da6c28aaSamw * or http://www.opensolaris.org/os/licensing. 10da6c28aaSamw * See the License for the specific language governing permissions 11da6c28aaSamw * and limitations under the License. 12da6c28aaSamw * 13da6c28aaSamw * When distributing Covered Code, include this CDDL HEADER in each 14da6c28aaSamw * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15da6c28aaSamw * If applicable, add the following below this CDDL HEADER, with the 16da6c28aaSamw * fields enclosed by brackets "[]" replaced with your own identifying 17da6c28aaSamw * information: Portions Copyright [yyyy] [name of copyright owner] 18da6c28aaSamw * 19da6c28aaSamw * CDDL HEADER END 20da6c28aaSamw */ 21da6c28aaSamw /* 22*148c5f43SAlan Wright * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 23da6c28aaSamw */ 24da6c28aaSamw 25da6c28aaSamw #include <sys/types.h> 26da6c28aaSamw #include <sys/sunddi.h> 27da6c28aaSamw #include <sys/kmem.h> 28da6c28aaSamw #include <sys/sysmacros.h> 29bbf6f00cSJordan Brown #include <smbsrv/smb_kproto.h> 30da6c28aaSamw #include <smbsrv/alloc.h> 31da6c28aaSamw 329fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States #define SMB_SMH_MAGIC 0x534D485F /* 'SMH_' */ 339fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States #define SMB_SMH_VALID(_smh_) ASSERT((_smh_)->smh_magic == SMB_SMH_MAGIC) 349fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States #define SMB_MEM2SMH(_mem_) ((smb_mem_header_t *)(_mem_) - 1) 35da6c28aaSamw 369fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States typedef struct smb_mem_header { 379fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States uint32_t smh_magic; 389fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States size_t smh_size; 399fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_request_t *smh_sr; 409fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States list_node_t smh_lnd; 419fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } smb_mem_header_t; 429fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 439fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States static void *smb_alloc(smb_request_t *, size_t, boolean_t); 449fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States static void smb_free(smb_request_t *, void *, boolean_t); 459fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States static void *smb_realloc(smb_request_t *, void *, size_t, boolean_t); 469fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 479fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 489fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate memory. 499fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 50da6c28aaSamw void * 519fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_alloc(size_t size) 52da6c28aaSamw { 539fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_alloc(NULL, size, B_FALSE)); 54da6c28aaSamw } 55da6c28aaSamw 569fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 579fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate memory and zero it out. 589fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 599fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void * 609fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_zalloc(size_t size) 619fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 629fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_alloc(NULL, size, B_TRUE)); 639fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 649fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 659fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 669fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate or resize memory previously allocated. 679fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 689fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * The address passed in MUST be considered invalid when this function returns. 699fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 709fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void * 719fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_realloc(void *ptr, size_t size) 729fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 739fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_realloc(NULL, ptr, size, B_FALSE)); 749fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 759fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 769fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 779fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate or resize memory previously allocated. If the new size is greater 789fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * than the current size, the extra space is zeroed out. If the new size is less 799fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * then the current size the space truncated is zeroed out. 809fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 819fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * The address passed in MUST be considered invalid when this function returns. 829fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 839fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void * 849fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_rezalloc(void *ptr, size_t size) 859fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 869fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_realloc(NULL, ptr, size, B_TRUE)); 879fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 889fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 899fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 909fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Free memory previously allocated with smb_malloc(), smb_zalloc(), 919fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * smb_remalloc() or smb_rezalloc(). 929fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 939fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void 949fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_free(void *ptr) 959fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 969fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_free(NULL, ptr, B_FALSE); 979fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 989fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 999fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 1009fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Free memory previously allocated with smb_mem_malloc(), smb_mem_zalloc(), 1019fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * smb_mem_remalloc() or smb_mem_rezalloc() or smb_mem_strdup(). The memory will 1029fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * be zeroed out before being actually freed. 1039fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 1049fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void 1059fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_zfree(void *ptr) 1069fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 1079fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_free(NULL, ptr, B_TRUE); 1089fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 1099fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 1109fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 1119fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Duplicate a string. 1129fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 113da6c28aaSamw char * 1149fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_strdup(const char *ptr) 115da6c28aaSamw { 116da6c28aaSamw char *p; 117da6c28aaSamw size_t size; 118da6c28aaSamw 119da6c28aaSamw size = strlen(ptr) + 1; 1209fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States p = smb_alloc(NULL, size, B_FALSE); 1219fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States bcopy(ptr, p, size); 122da6c28aaSamw return (p); 123da6c28aaSamw } 124da6c28aaSamw 125bbf6f00cSJordan Brown /* 126bbf6f00cSJordan Brown * Initialize the list for request-specific temporary storage. 127bbf6f00cSJordan Brown */ 128bbf6f00cSJordan Brown void 129bbf6f00cSJordan Brown smb_srm_init(smb_request_t *sr) 130bbf6f00cSJordan Brown { 1319fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States list_create(&sr->sr_storage, sizeof (smb_mem_header_t), 1329fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States offsetof(smb_mem_header_t, smh_lnd)); 133bbf6f00cSJordan Brown } 134bbf6f00cSJordan Brown 135bbf6f00cSJordan Brown /* 1369fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Free everything on the request-specific temporary storage list and destroy 1379fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * the list. 138bbf6f00cSJordan Brown */ 139bbf6f00cSJordan Brown void 140bbf6f00cSJordan Brown smb_srm_fini(smb_request_t *sr) 141bbf6f00cSJordan Brown { 1429fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_header_t *smh; 143bbf6f00cSJordan Brown 1449fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States while ((smh = list_head(&sr->sr_storage)) != NULL) 1459fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_free(sr, ++smh, B_FALSE); 146bbf6f00cSJordan Brown list_destroy(&sr->sr_storage); 147bbf6f00cSJordan Brown } 148bbf6f00cSJordan Brown 149bbf6f00cSJordan Brown /* 150bbf6f00cSJordan Brown * Allocate memory and associate it with the specified request. 1519fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Memory allocated here can only be used for the duration of this request; it 1529fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * will be freed automatically on completion of the request. 153bbf6f00cSJordan Brown */ 154bbf6f00cSJordan Brown void * 155bbf6f00cSJordan Brown smb_srm_alloc(smb_request_t *sr, size_t size) 156bbf6f00cSJordan Brown { 1579fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_alloc(sr, size, B_FALSE)); 158bbf6f00cSJordan Brown } 159bbf6f00cSJordan Brown 160bbf6f00cSJordan Brown /* 1619fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate memory, zero it out and associate it with the specified request. 1629fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Memory allocated here can only be used for the duration of this request; it 1639fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * will be freed automatically on completion of the request. 1649fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 1659fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void * 1669fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_srm_zalloc(smb_request_t *sr, size_t size) 1679fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 1689fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_alloc(sr, size, B_TRUE)); 1699fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 1709fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 1719fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 1729fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate or resize memory previously allocated for the specified request. 1739fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 1749fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * The address passed in MUST be considered invalid when this function returns. 175bbf6f00cSJordan Brown */ 176bbf6f00cSJordan Brown void * 177bbf6f00cSJordan Brown smb_srm_realloc(smb_request_t *sr, void *p, size_t size) 178bbf6f00cSJordan Brown { 1799fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_realloc(sr, p, size, B_FALSE)); 1809fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 181bbf6f00cSJordan Brown 182bbf6f00cSJordan Brown /* 1839fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate or resize memory previously allocated for the specified request. If 1849fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * the new size is greater than the current size, the extra space is zeroed out. 1859fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * If the new size is less then the current size the space truncated is zeroed 1869fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * out. 1879fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 1889fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * The address passed in MUST be considered invalid when this function returns. 189bbf6f00cSJordan Brown */ 1909fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void * 1919fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_srm_rezalloc(smb_request_t *sr, void *p, size_t size) 1929fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 1939fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_realloc(sr, p, size, B_TRUE)); 1949fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 1959fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 196*148c5f43SAlan Wright char * 197*148c5f43SAlan Wright smb_srm_strdup(smb_request_t *sr, const char *s) 198*148c5f43SAlan Wright { 199*148c5f43SAlan Wright char *p; 200*148c5f43SAlan Wright size_t size; 201*148c5f43SAlan Wright 202*148c5f43SAlan Wright size = strlen(s) + 1; 203*148c5f43SAlan Wright p = smb_srm_alloc(sr, size); 204*148c5f43SAlan Wright bcopy(s, p, size); 205*148c5f43SAlan Wright return (p); 206*148c5f43SAlan Wright } 207*148c5f43SAlan Wright 2089fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 2099fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate memory. 2109fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2119fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * sr If not NULL, request the memory allocated must be associated with. 2129fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2139fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * size Size of the meory to allocate. 2149fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2159fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * zero If true the memory allocated will be zeroed out. 2169fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 2179fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States static void * 2189fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_alloc(smb_request_t *sr, size_t size, boolean_t zero) 2199fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 2209fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_header_t *smh; 2219fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2229fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (zero) { 2239fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh = kmem_zalloc(size + sizeof (smb_mem_header_t), KM_SLEEP); 2249fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } else { 2259fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh = kmem_alloc(size + sizeof (smb_mem_header_t), KM_SLEEP); 2269fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh->smh_sr = NULL; 2279fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States bzero(&smh->smh_lnd, sizeof (smh->smh_lnd)); 2289fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2299fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh->smh_sr = sr; 2309fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh->smh_size = size; 2319fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh->smh_magic = SMB_SMH_MAGIC; 2329fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (sr != NULL) { 2339fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States SMB_REQ_VALID(sr); 2349fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States list_insert_tail(&sr->sr_storage, smh); 2359fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2369fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (++smh); 2379fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2389fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2399fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 2409fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Free memory. 2419fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2429fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * sr If not NULL, request the memory to free is associated with. 2439fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2449fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * ptr Memory address 2459fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2469fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * zero If true the memory is zeroed out before being freed. 2479fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 2489fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States static void 2499fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_free(smb_request_t *sr, void *ptr, boolean_t zero) 2509fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 2519fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_header_t *smh; 2529fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2539fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (ptr != NULL) { 2549fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh = SMB_MEM2SMH(ptr); 2559fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States SMB_SMH_VALID(smh); 2569fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States ASSERT(sr == smh->smh_sr); 2579fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (sr != NULL) { 2589fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States SMB_REQ_VALID(sr); 2599fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States list_remove(&sr->sr_storage, smh); 2609fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2619fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (zero) 2629fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States bzero(ptr, smh->smh_size); 2639fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2649fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh->smh_magic = 0; 2659fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States kmem_free(smh, smh->smh_size + sizeof (smb_mem_header_t)); 2669fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2679fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2689fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2699fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States /* 2709fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Allocate or resize memory previously allocated. 2719fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2729fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * sr If not NULL, request the memory is associated with. 2739fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2749fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * ptr Memory address 2759fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2769fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * size New size 2779fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * 2789fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * zero If true zero out the extra space or the truncated space. 2799fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States */ 2809fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States static void * 2819fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_realloc(smb_request_t *sr, void *ptr, size_t size, boolean_t zero) 2829fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States { 2839fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_mem_header_t *smh; 2849fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States void *new_ptr; 2859fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2869fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (ptr == NULL) 2879fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (smb_alloc(sr, size, zero)); 2889fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2899fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smh = SMB_MEM2SMH(ptr); 2909fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States SMB_SMH_VALID(smh); 2919fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States ASSERT(sr == smh->smh_sr); 2929fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 2939fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (size == 0) { 2949fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_free(sr, ptr, zero); 2959fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (NULL); 2969fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 2979fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (smh->smh_size >= size) { 2989fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if ((zero) & (smh->smh_size > size)) 2999fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States bzero((caddr_t)ptr + size, smh->smh_size - size); 3009fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (ptr); 3019fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States } 3029fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States new_ptr = smb_alloc(sr, size, B_FALSE); 3039fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States bcopy(ptr, new_ptr, smh->smh_size); 3049fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States if (zero) 3059fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States bzero((caddr_t)new_ptr + smh->smh_size, size - smh->smh_size); 3069fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States 3079fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States smb_free(sr, ptr, zero); 3089fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States return (new_ptr); 309bbf6f00cSJordan Brown } 310