Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dmu.c @ 14151:189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Dan McDonald <danmcd@nexenta.com>
author | Matthew Ahrens <mahrens@delphix.com> |
---|---|
date | Tue, 20 Aug 2013 20:11:52 -0800 |
parents | 9475b3fef59d |
children | dc75c925d8aa |
rev | line source |
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789 | 1 /* |
2 * CDDL HEADER START | |
3 * | |
4 * The contents of this file are subject to the terms of the | |
1544 | 5 * Common Development and Distribution License (the "License"). |
6 * You may not use this file except in compliance with the License. | |
789 | 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 /* | |
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22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
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23 * Copyright (c) 2013 by Delphix. All rights reserved. |
789 | 24 */ |
25 | |
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26 /* Copyright (c) 2013 by Saso Kiselkov. All rights reserved. */ |
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27 |
789 | 28 #include <sys/dmu.h> |
29 #include <sys/dmu_impl.h> | |
30 #include <sys/dmu_tx.h> | |
31 #include <sys/dbuf.h> | |
32 #include <sys/dnode.h> | |
33 #include <sys/zfs_context.h> | |
34 #include <sys/dmu_objset.h> | |
35 #include <sys/dmu_traverse.h> | |
36 #include <sys/dsl_dataset.h> | |
37 #include <sys/dsl_dir.h> | |
38 #include <sys/dsl_pool.h> | |
2199 | 39 #include <sys/dsl_synctask.h> |
2885 | 40 #include <sys/dsl_prop.h> |
789 | 41 #include <sys/dmu_zfetch.h> |
42 #include <sys/zfs_ioctl.h> | |
43 #include <sys/zap.h> | |
1544 | 44 #include <sys/zio_checksum.h> |
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45 #include <sys/zio_compress.h> |
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46 #include <sys/sa.h> |
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47 #ifdef _KERNEL |
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48 #include <sys/vmsystm.h> |
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49 #include <sys/zfs_znode.h> |
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50 #endif |
789 | 51 |
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52 /* |
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53 * Enable/disable nopwrite feature. |
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54 */ |
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55 int zfs_nopwrite_enabled = 1; |
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56 |
789 | 57 const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = { |
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58 { DMU_BSWAP_UINT8, TRUE, "unallocated" }, |
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59 { DMU_BSWAP_ZAP, TRUE, "object directory" }, |
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60 { DMU_BSWAP_UINT64, TRUE, "object array" }, |
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61 { DMU_BSWAP_UINT8, TRUE, "packed nvlist" }, |
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62 { DMU_BSWAP_UINT64, TRUE, "packed nvlist size" }, |
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63 { DMU_BSWAP_UINT64, TRUE, "bpobj" }, |
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64 { DMU_BSWAP_UINT64, TRUE, "bpobj header" }, |
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65 { DMU_BSWAP_UINT64, TRUE, "SPA space map header" }, |
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66 { DMU_BSWAP_UINT64, TRUE, "SPA space map" }, |
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67 { DMU_BSWAP_UINT64, TRUE, "ZIL intent log" }, |
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68 { DMU_BSWAP_DNODE, TRUE, "DMU dnode" }, |
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69 { DMU_BSWAP_OBJSET, TRUE, "DMU objset" }, |
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70 { DMU_BSWAP_UINT64, TRUE, "DSL directory" }, |
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71 { DMU_BSWAP_ZAP, TRUE, "DSL directory child map"}, |
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72 { DMU_BSWAP_ZAP, TRUE, "DSL dataset snap map" }, |
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73 { DMU_BSWAP_ZAP, TRUE, "DSL props" }, |
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74 { DMU_BSWAP_UINT64, TRUE, "DSL dataset" }, |
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75 { DMU_BSWAP_ZNODE, TRUE, "ZFS znode" }, |
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76 { DMU_BSWAP_OLDACL, TRUE, "ZFS V0 ACL" }, |
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77 { DMU_BSWAP_UINT8, FALSE, "ZFS plain file" }, |
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78 { DMU_BSWAP_ZAP, TRUE, "ZFS directory" }, |
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79 { DMU_BSWAP_ZAP, TRUE, "ZFS master node" }, |
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80 { DMU_BSWAP_ZAP, TRUE, "ZFS delete queue" }, |
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81 { DMU_BSWAP_UINT8, FALSE, "zvol object" }, |
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82 { DMU_BSWAP_ZAP, TRUE, "zvol prop" }, |
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83 { DMU_BSWAP_UINT8, FALSE, "other uint8[]" }, |
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84 { DMU_BSWAP_UINT64, FALSE, "other uint64[]" }, |
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85 { DMU_BSWAP_ZAP, TRUE, "other ZAP" }, |
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86 { DMU_BSWAP_ZAP, TRUE, "persistent error log" }, |
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87 { DMU_BSWAP_UINT8, TRUE, "SPA history" }, |
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88 { DMU_BSWAP_UINT64, TRUE, "SPA history offsets" }, |
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89 { DMU_BSWAP_ZAP, TRUE, "Pool properties" }, |
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90 { DMU_BSWAP_ZAP, TRUE, "DSL permissions" }, |
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91 { DMU_BSWAP_ACL, TRUE, "ZFS ACL" }, |
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92 { DMU_BSWAP_UINT8, TRUE, "ZFS SYSACL" }, |
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93 { DMU_BSWAP_UINT8, TRUE, "FUID table" }, |
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94 { DMU_BSWAP_UINT64, TRUE, "FUID table size" }, |
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95 { DMU_BSWAP_ZAP, TRUE, "DSL dataset next clones"}, |
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96 { DMU_BSWAP_ZAP, TRUE, "scan work queue" }, |
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97 { DMU_BSWAP_ZAP, TRUE, "ZFS user/group used" }, |
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98 { DMU_BSWAP_ZAP, TRUE, "ZFS user/group quota" }, |
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99 { DMU_BSWAP_ZAP, TRUE, "snapshot refcount tags"}, |
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100 { DMU_BSWAP_ZAP, TRUE, "DDT ZAP algorithm" }, |
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101 { DMU_BSWAP_ZAP, TRUE, "DDT statistics" }, |
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102 { DMU_BSWAP_UINT8, TRUE, "System attributes" }, |
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103 { DMU_BSWAP_ZAP, TRUE, "SA master node" }, |
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104 { DMU_BSWAP_ZAP, TRUE, "SA attr registration" }, |
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105 { DMU_BSWAP_ZAP, TRUE, "SA attr layouts" }, |
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106 { DMU_BSWAP_ZAP, TRUE, "scan translations" }, |
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107 { DMU_BSWAP_UINT8, FALSE, "deduplicated block" }, |
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108 { DMU_BSWAP_ZAP, TRUE, "DSL deadlist map" }, |
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109 { DMU_BSWAP_UINT64, TRUE, "DSL deadlist map hdr" }, |
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110 { DMU_BSWAP_ZAP, TRUE, "DSL dir clones" }, |
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111 { DMU_BSWAP_UINT64, TRUE, "bpobj subobj" } |
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112 }; |
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113 |
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114 const dmu_object_byteswap_info_t dmu_ot_byteswap[DMU_BSWAP_NUMFUNCS] = { |
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115 { byteswap_uint8_array, "uint8" }, |
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116 { byteswap_uint16_array, "uint16" }, |
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117 { byteswap_uint32_array, "uint32" }, |
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118 { byteswap_uint64_array, "uint64" }, |
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119 { zap_byteswap, "zap" }, |
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120 { dnode_buf_byteswap, "dnode" }, |
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121 { dmu_objset_byteswap, "objset" }, |
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122 { zfs_znode_byteswap, "znode" }, |
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123 { zfs_oldacl_byteswap, "oldacl" }, |
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124 { zfs_acl_byteswap, "acl" } |
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125 }; |
789 | 126 |
127 int | |
1544 | 128 dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset, |
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129 void *tag, dmu_buf_t **dbp, int flags) |
789 | 130 { |
131 dnode_t *dn; | |
132 uint64_t blkid; | |
133 dmu_buf_impl_t *db; | |
1544 | 134 int err; |
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135 int db_flags = DB_RF_CANFAIL; |
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136 |
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137 if (flags & DMU_READ_NO_PREFETCH) |
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138 db_flags |= DB_RF_NOPREFETCH; |
789 | 139 |
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140 err = dnode_hold(os, object, FTAG, &dn); |
1544 | 141 if (err) |
142 return (err); | |
789 | 143 blkid = dbuf_whichblock(dn, offset); |
144 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
1544 | 145 db = dbuf_hold(dn, blkid, tag); |
789 | 146 rw_exit(&dn->dn_struct_rwlock); |
1544 | 147 if (db == NULL) { |
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148 err = SET_ERROR(EIO); |
1544 | 149 } else { |
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150 err = dbuf_read(db, NULL, db_flags); |
1544 | 151 if (err) { |
152 dbuf_rele(db, tag); | |
153 db = NULL; | |
154 } | |
155 } | |
156 | |
789 | 157 dnode_rele(dn, FTAG); |
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158 *dbp = &db->db; /* NULL db plus first field offset is NULL */ |
1544 | 159 return (err); |
789 | 160 } |
161 | |
162 int | |
163 dmu_bonus_max(void) | |
164 { | |
165 return (DN_MAX_BONUSLEN); | |
166 } | |
167 | |
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168 int |
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169 dmu_set_bonus(dmu_buf_t *db_fake, int newsize, dmu_tx_t *tx) |
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170 { |
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171 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
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172 dnode_t *dn; |
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173 int error; |
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174 |
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175 DB_DNODE_ENTER(db); |
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176 dn = DB_DNODE(db); |
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177 |
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178 if (dn->dn_bonus != db) { |
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179 error = SET_ERROR(EINVAL); |
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180 } else if (newsize < 0 || newsize > db_fake->db_size) { |
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181 error = SET_ERROR(EINVAL); |
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182 } else { |
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183 dnode_setbonuslen(dn, newsize, tx); |
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184 error = 0; |
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185 } |
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186 |
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187 DB_DNODE_EXIT(db); |
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188 return (error); |
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189 } |
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190 |
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191 int |
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192 dmu_set_bonustype(dmu_buf_t *db_fake, dmu_object_type_t type, dmu_tx_t *tx) |
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193 { |
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194 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
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195 dnode_t *dn; |
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196 int error; |
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197 |
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198 DB_DNODE_ENTER(db); |
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199 dn = DB_DNODE(db); |
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200 |
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201 if (!DMU_OT_IS_VALID(type)) { |
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202 error = SET_ERROR(EINVAL); |
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203 } else if (dn->dn_bonus != db) { |
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204 error = SET_ERROR(EINVAL); |
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205 } else { |
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206 dnode_setbonus_type(dn, type, tx); |
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207 error = 0; |
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208 } |
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209 |
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210 DB_DNODE_EXIT(db); |
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211 return (error); |
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212 } |
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213 |
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214 dmu_object_type_t |
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215 dmu_get_bonustype(dmu_buf_t *db_fake) |
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216 { |
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217 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
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218 dnode_t *dn; |
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219 dmu_object_type_t type; |
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220 |
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221 DB_DNODE_ENTER(db); |
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222 dn = DB_DNODE(db); |
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223 type = dn->dn_bonustype; |
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224 DB_DNODE_EXIT(db); |
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225 |
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226 return (type); |
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227 } |
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228 |
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229 int |
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230 dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx) |
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231 { |
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232 dnode_t *dn; |
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233 int error; |
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234 |
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235 error = dnode_hold(os, object, FTAG, &dn); |
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236 dbuf_rm_spill(dn, tx); |
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237 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
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238 dnode_rm_spill(dn, tx); |
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239 rw_exit(&dn->dn_struct_rwlock); |
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240 dnode_rele(dn, FTAG); |
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241 return (error); |
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242 } |
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243 |
789 | 244 /* |
1544 | 245 * returns ENOENT, EIO, or 0. |
789 | 246 */ |
1544 | 247 int |
248 dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) | |
789 | 249 { |
1544 | 250 dnode_t *dn; |
789 | 251 dmu_buf_impl_t *db; |
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252 int error; |
789 | 253 |
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254 error = dnode_hold(os, object, FTAG, &dn); |
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255 if (error) |
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256 return (error); |
789 | 257 |
1544 | 258 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
259 if (dn->dn_bonus == NULL) { | |
789 | 260 rw_exit(&dn->dn_struct_rwlock); |
1544 | 261 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
262 if (dn->dn_bonus == NULL) | |
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263 dbuf_create_bonus(dn); |
789 | 264 } |
1544 | 265 db = dn->dn_bonus; |
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266 |
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267 /* as long as the bonus buf is held, the dnode will be held */ |
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268 if (refcount_add(&db->db_holds, tag) == 1) { |
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269 VERIFY(dnode_add_ref(dn, db)); |
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270 (void) atomic_inc_32_nv(&dn->dn_dbufs_count); |
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271 } |
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272 |
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273 /* |
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274 * Wait to drop dn_struct_rwlock until after adding the bonus dbuf's |
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275 * hold and incrementing the dbuf count to ensure that dnode_move() sees |
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276 * a dnode hold for every dbuf. |
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277 */ |
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278 rw_exit(&dn->dn_struct_rwlock); |
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279 |
789 | 280 dnode_rele(dn, FTAG); |
1544 | 281 |
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282 VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH)); |
1544 | 283 |
284 *dbp = &db->db; | |
285 return (0); | |
789 | 286 } |
287 | |
2391 | 288 /* |
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289 * returns ENOENT, EIO, or 0. |
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290 * |
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291 * This interface will allocate a blank spill dbuf when a spill blk |
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292 * doesn't already exist on the dnode. |
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293 * |
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294 * if you only want to find an already existing spill db, then |
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295 * dmu_spill_hold_existing() should be used. |
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296 */ |
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297 int |
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298 dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp) |
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299 { |
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300 dmu_buf_impl_t *db = NULL; |
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301 int err; |
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302 |
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303 if ((flags & DB_RF_HAVESTRUCT) == 0) |
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304 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
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305 |
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306 db = dbuf_hold(dn, DMU_SPILL_BLKID, tag); |
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307 |
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308 if ((flags & DB_RF_HAVESTRUCT) == 0) |
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309 rw_exit(&dn->dn_struct_rwlock); |
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310 |
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311 ASSERT(db != NULL); |
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312 err = dbuf_read(db, NULL, flags); |
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313 if (err == 0) |
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314 *dbp = &db->db; |
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315 else |
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316 dbuf_rele(db, tag); |
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317 return (err); |
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318 } |
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319 |
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320 int |
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321 dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) |
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322 { |
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323 dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus; |
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324 dnode_t *dn; |
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325 int err; |
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326 |
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327 DB_DNODE_ENTER(db); |
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328 dn = DB_DNODE(db); |
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329 |
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330 if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) { |
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331 err = SET_ERROR(EINVAL); |
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332 } else { |
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333 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
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334 |
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335 if (!dn->dn_have_spill) { |
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336 err = SET_ERROR(ENOENT); |
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337 } else { |
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338 err = dmu_spill_hold_by_dnode(dn, |
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339 DB_RF_HAVESTRUCT | DB_RF_CANFAIL, tag, dbp); |
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340 } |
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341 |
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342 rw_exit(&dn->dn_struct_rwlock); |
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343 } |
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344 |
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345 DB_DNODE_EXIT(db); |
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346 return (err); |
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347 } |
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348 |
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349 int |
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350 dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp) |
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351 { |
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352 dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus; |
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353 dnode_t *dn; |
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354 int err; |
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355 |
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356 DB_DNODE_ENTER(db); |
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357 dn = DB_DNODE(db); |
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358 err = dmu_spill_hold_by_dnode(dn, DB_RF_CANFAIL, tag, dbp); |
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359 DB_DNODE_EXIT(db); |
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360 |
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361 return (err); |
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362 } |
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363 |
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364 /* |
2391 | 365 * Note: longer-term, we should modify all of the dmu_buf_*() interfaces |
366 * to take a held dnode rather than <os, object> -- the lookup is wasteful, | |
367 * and can induce severe lock contention when writing to several files | |
368 * whose dnodes are in the same block. | |
369 */ | |
370 static int | |
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371 dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length, |
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372 int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags) |
789 | 373 { |
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374 dsl_pool_t *dp = NULL; |
789 | 375 dmu_buf_t **dbp; |
376 uint64_t blkid, nblks, i; | |
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377 uint32_t dbuf_flags; |
1544 | 378 int err; |
379 zio_t *zio; | |
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380 hrtime_t start; |
1544 | 381 |
382 ASSERT(length <= DMU_MAX_ACCESS); | |
789 | 383 |
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384 dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT; |
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385 if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz) |
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386 dbuf_flags |= DB_RF_NOPREFETCH; |
1544 | 387 |
789 | 388 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
389 if (dn->dn_datablkshift) { | |
390 int blkshift = dn->dn_datablkshift; | |
391 nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) - | |
3912 | 392 P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift; |
789 | 393 } else { |
3713 | 394 if (offset + length > dn->dn_datablksz) { |
395 zfs_panic_recover("zfs: accessing past end of object " | |
396 "%llx/%llx (size=%u access=%llu+%llu)", | |
397 (longlong_t)dn->dn_objset-> | |
398 os_dsl_dataset->ds_object, | |
399 (longlong_t)dn->dn_object, dn->dn_datablksz, | |
400 (longlong_t)offset, (longlong_t)length); | |
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401 rw_exit(&dn->dn_struct_rwlock); |
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402 return (SET_ERROR(EIO)); |
3713 | 403 } |
789 | 404 nblks = 1; |
405 } | |
1544 | 406 dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); |
789 | 407 |
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408 if (dn->dn_objset->os_dsl_dataset) |
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409 dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool; |
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410 start = gethrtime(); |
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411 zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL); |
789 | 412 blkid = dbuf_whichblock(dn, offset); |
413 for (i = 0; i < nblks; i++) { | |
1544 | 414 dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag); |
415 if (db == NULL) { | |
416 rw_exit(&dn->dn_struct_rwlock); | |
417 dmu_buf_rele_array(dbp, nblks, tag); | |
418 zio_nowait(zio); | |
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419 return (SET_ERROR(EIO)); |
1544 | 420 } |
421 /* initiate async i/o */ | |
2391 | 422 if (read) { |
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423 (void) dbuf_read(db, zio, dbuf_flags); |
1544 | 424 } |
425 dbp[i] = &db->db; | |
789 | 426 } |
427 rw_exit(&dn->dn_struct_rwlock); | |
428 | |
1544 | 429 /* wait for async i/o */ |
430 err = zio_wait(zio); | |
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431 /* track read overhead when we are in sync context */ |
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432 if (dp && dsl_pool_sync_context(dp)) |
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433 dp->dp_read_overhead += gethrtime() - start; |
1544 | 434 if (err) { |
435 dmu_buf_rele_array(dbp, nblks, tag); | |
436 return (err); | |
789 | 437 } |
438 | |
1544 | 439 /* wait for other io to complete */ |
440 if (read) { | |
441 for (i = 0; i < nblks; i++) { | |
442 dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; | |
443 mutex_enter(&db->db_mtx); | |
444 while (db->db_state == DB_READ || | |
445 db->db_state == DB_FILL) | |
446 cv_wait(&db->db_changed, &db->db_mtx); | |
447 if (db->db_state == DB_UNCACHED) | |
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448 err = SET_ERROR(EIO); |
1544 | 449 mutex_exit(&db->db_mtx); |
450 if (err) { | |
451 dmu_buf_rele_array(dbp, nblks, tag); | |
452 return (err); | |
453 } | |
454 } | |
455 } | |
789 | 456 |
1544 | 457 *numbufsp = nblks; |
458 *dbpp = dbp; | |
459 return (0); | |
789 | 460 } |
461 | |
2885 | 462 static int |
2391 | 463 dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, |
464 uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) | |
465 { | |
466 dnode_t *dn; | |
467 int err; | |
468 | |
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469 err = dnode_hold(os, object, FTAG, &dn); |
2391 | 470 if (err) |
471 return (err); | |
472 | |
473 err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, | |
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474 numbufsp, dbpp, DMU_READ_PREFETCH); |
2391 | 475 |
476 dnode_rele(dn, FTAG); | |
477 | |
478 return (err); | |
479 } | |
480 | |
481 int | |
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482 dmu_buf_hold_array_by_bonus(dmu_buf_t *db_fake, uint64_t offset, |
2391 | 483 uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) |
484 { | |
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485 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
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486 dnode_t *dn; |
2391 | 487 int err; |
488 | |
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489 DB_DNODE_ENTER(db); |
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6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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490 dn = DB_DNODE(db); |
2391 | 491 err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, |
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492 numbufsp, dbpp, DMU_READ_PREFETCH); |
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493 DB_DNODE_EXIT(db); |
2391 | 494 |
495 return (err); | |
496 } | |
497 | |
789 | 498 void |
1544 | 499 dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) |
789 | 500 { |
501 int i; | |
502 dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; | |
503 | |
504 if (numbufs == 0) | |
505 return; | |
506 | |
1544 | 507 for (i = 0; i < numbufs; i++) { |
508 if (dbp[i]) | |
509 dbuf_rele(dbp[i], tag); | |
510 } | |
789 | 511 |
512 kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); | |
513 } | |
514 | |
515 void | |
516 dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len) | |
517 { | |
518 dnode_t *dn; | |
519 uint64_t blkid; | |
1544 | 520 int nblks, i, err; |
789 | 521 |
2986 | 522 if (zfs_prefetch_disable) |
523 return; | |
524 | |
789 | 525 if (len == 0) { /* they're interested in the bonus buffer */ |
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526 dn = DMU_META_DNODE(os); |
789 | 527 |
528 if (object == 0 || object >= DN_MAX_OBJECT) | |
529 return; | |
530 | |
531 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
532 blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t)); | |
533 dbuf_prefetch(dn, blkid); | |
534 rw_exit(&dn->dn_struct_rwlock); | |
535 return; | |
536 } | |
537 | |
538 /* | |
539 * XXX - Note, if the dnode for the requested object is not | |
540 * already cached, we will do a *synchronous* read in the | |
541 * dnode_hold() call. The same is true for any indirects. | |
542 */ | |
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543 err = dnode_hold(os, object, FTAG, &dn); |
1544 | 544 if (err != 0) |
789 | 545 return; |
546 | |
547 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
548 if (dn->dn_datablkshift) { | |
549 int blkshift = dn->dn_datablkshift; | |
550 nblks = (P2ROUNDUP(offset+len, 1<<blkshift) - | |
3912 | 551 P2ALIGN(offset, 1<<blkshift)) >> blkshift; |
789 | 552 } else { |
553 nblks = (offset < dn->dn_datablksz); | |
554 } | |
555 | |
556 if (nblks != 0) { | |
557 blkid = dbuf_whichblock(dn, offset); | |
558 for (i = 0; i < nblks; i++) | |
559 dbuf_prefetch(dn, blkid+i); | |
560 } | |
561 | |
562 rw_exit(&dn->dn_struct_rwlock); | |
563 | |
564 dnode_rele(dn, FTAG); | |
565 } | |
566 | |
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567 /* |
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568 * Get the next "chunk" of file data to free. We traverse the file from |
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569 * the end so that the file gets shorter over time (if we crashes in the |
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570 * middle, this will leave us in a better state). We find allocated file |
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571 * data by simply searching the allocated level 1 indirects. |
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572 * |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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573 * On input, *start should be the first offset that does not need to be |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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574 * freed (e.g. "offset + length"). On return, *start will be the first |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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575 * offset that should be freed. |
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576 */ |
6992 | 577 static int |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
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578 get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t minimum) |
6992 | 579 { |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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580 uint64_t maxblks = DMU_MAX_ACCESS >> (dn->dn_indblkshift + 1); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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581 /* bytes of data covered by a level-1 indirect block */ |
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582 uint64_t iblkrange = |
7385
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6727817 ZFS assertion failure (zero length arc_buf_alloc) during NFS I/O
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583 dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT); |
6992 | 584 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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585 ASSERT3U(minimum, <=, *start); |
6992 | 586 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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587 if (*start - minimum <= iblkrange * maxblks) { |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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588 *start = minimum; |
6992 | 589 return (0); |
590 } | |
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591 ASSERT(ISP2(iblkrange)); |
7385
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592 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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593 for (uint64_t blks = 0; *start > minimum && blks < maxblks; blks++) { |
7385
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594 int err; |
6992 | 595 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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596 /* |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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597 * dnode_next_offset(BACKWARDS) will find an allocated L1 |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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598 * indirect block at or before the input offset. We must |
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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599 * decrement *start so that it is at the end of the region |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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600 * to search. |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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601 */ |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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602 (*start)--; |
6992 | 603 err = dnode_next_offset(dn, |
9950
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604 DNODE_FIND_BACKWARDS, start, 2, 1, 0); |
6992 | 605 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
606 /* if there are no indirect blocks before start, we are done */ |
9950
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607 if (err == ESRCH) { |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
608 *start = minimum; |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
609 break; |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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610 } else if (err != 0) { |
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611 return (err); |
6992 | 612 } |
613 | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
614 /* set start to the beginning of this L1 indirect */ |
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615 *start = P2ALIGN(*start, iblkrange); |
6992 | 616 } |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
617 if (*start < minimum) |
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
618 *start = minimum; |
6992 | 619 return (0); |
620 } | |
621 | |
622 static int | |
623 dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset, | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
624 uint64_t length) |
6992 | 625 { |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
626 uint64_t object_size = (dn->dn_maxblkid + 1) * dn->dn_datablksz; |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
627 int err; |
6992 | 628 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
629 if (offset >= object_size) |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
630 return (0); |
6992 | 631 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
632 if (length == DMU_OBJECT_END || offset + length > object_size) |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
633 length = object_size - offset; |
6992 | 634 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
635 while (length != 0) { |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
636 uint64_t chunk_end, chunk_begin; |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
637 |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
638 chunk_end = chunk_begin = offset + length; |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
639 |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
640 /* move chunk_begin backwards to the beginning of this chunk */ |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
641 err = get_next_chunk(dn, &chunk_begin, offset); |
6992 | 642 if (err) |
643 return (err); | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
644 ASSERT3U(chunk_begin, >=, offset); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
645 ASSERT3U(chunk_begin, <=, chunk_end); |
6992 | 646 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
647 dmu_tx_t *tx = dmu_tx_create(os); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
648 dmu_tx_hold_free(tx, dn->dn_object, |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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changeset
|
649 chunk_begin, chunk_end - chunk_begin); |
6992 | 650 err = dmu_tx_assign(tx, TXG_WAIT); |
651 if (err) { | |
652 dmu_tx_abort(tx); | |
653 return (err); | |
654 } | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
655 dnode_free_range(dn, chunk_begin, chunk_end - chunk_begin, tx); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
656 dmu_tx_commit(tx); |
6992 | 657 |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
658 length -= chunk_end - chunk_begin; |
6992 | 659 } |
660 return (0); | |
661 } | |
662 | |
663 int | |
664 dmu_free_long_range(objset_t *os, uint64_t object, | |
665 uint64_t offset, uint64_t length) | |
666 { | |
667 dnode_t *dn; | |
668 int err; | |
669 | |
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|
670 err = dnode_hold(os, object, FTAG, &dn); |
6992 | 671 if (err != 0) |
672 return (err); | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
673 err = dmu_free_long_range_impl(os, dn, offset, length); |
6992 | 674 dnode_rele(dn, FTAG); |
675 return (err); | |
676 } | |
677 | |
678 int | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
679 dmu_free_long_object(objset_t *os, uint64_t object) |
6992 | 680 { |
681 dmu_tx_t *tx; | |
682 int err; | |
683 | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
684 err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END); |
6992 | 685 if (err != 0) |
686 return (err); | |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
687 |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
14045
diff
changeset
|
688 tx = dmu_tx_create(os); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
14045
diff
changeset
|
689 dmu_tx_hold_bonus(tx, object); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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parents:
14045
diff
changeset
|
690 dmu_tx_hold_free(tx, object, 0, DMU_OBJECT_END); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
14045
diff
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|
691 err = dmu_tx_assign(tx, TXG_WAIT); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
14045
diff
changeset
|
692 if (err == 0) { |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
14045
diff
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|
693 err = dmu_object_free(os, object, tx); |
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
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diff
changeset
|
694 dmu_tx_commit(tx); |
6992 | 695 } else { |
14151
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4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
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diff
changeset
|
696 dmu_tx_abort(tx); |
6992 | 697 } |
14151
189ec27885ae
4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive
Matthew Ahrens <mahrens@delphix.com>
parents:
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diff
changeset
|
698 |
6992 | 699 return (err); |
700 } | |
701 | |
1544 | 702 int |
789 | 703 dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, |
704 uint64_t size, dmu_tx_t *tx) | |
705 { | |
1544 | 706 dnode_t *dn; |
10298
a0d52501437c
6860996 %temporary clones are not automatically destroyed on error
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents:
10242
diff
changeset
|
707 int err = dnode_hold(os, object, FTAG, &dn); |
1544 | 708 if (err) |
709 return (err); | |
789 | 710 ASSERT(offset < UINT64_MAX); |
711 ASSERT(size == -1ULL || size <= UINT64_MAX - offset); | |
712 dnode_free_range(dn, offset, size, tx); | |
713 dnode_rele(dn, FTAG); | |
1544 | 714 return (0); |
789 | 715 } |
716 | |
1544 | 717 int |
718 dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, | |
9512
64cafcbcc337
6801810 Commit of aligned streaming rewrites to ZIL device causes unwanted disk reads
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
9412
diff
changeset
|
719 void *buf, uint32_t flags) |
789 | 720 { |
721 dnode_t *dn; | |
722 dmu_buf_t **dbp; | |
10209
91f47f0e7728
6830541 zfs_get_data trips on a verify
Mark J Musante <Mark.Musante@Sun.COM>
parents:
9951
diff
changeset
|
723 int numbufs, err; |
789 | 724 |
10298
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diff
changeset
|
725 err = dnode_hold(os, object, FTAG, &dn); |
1544 | 726 if (err) |
727 return (err); | |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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diff
changeset
|
728 |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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diff
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|
729 /* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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diff
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|
730 * Deal with odd block sizes, where there can't be data past the first |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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diff
changeset
|
731 * block. If we ever do the tail block optimization, we will need to |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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diff
changeset
|
732 * handle that here as well. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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diff
changeset
|
733 */ |
10209
91f47f0e7728
6830541 zfs_get_data trips on a verify
Mark J Musante <Mark.Musante@Sun.COM>
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diff
changeset
|
734 if (dn->dn_maxblkid == 0) { |
789 | 735 int newsz = offset > dn->dn_datablksz ? 0 : |
736 MIN(size, dn->dn_datablksz - offset); | |
737 bzero((char *)buf + newsz, size - newsz); | |
738 size = newsz; | |
739 } | |
740 | |
741 while (size > 0) { | |
742 uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); | |
10209
91f47f0e7728
6830541 zfs_get_data trips on a verify
Mark J Musante <Mark.Musante@Sun.COM>
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diff
changeset
|
743 int i; |
789 | 744 |
745 /* | |
746 * NB: we could do this block-at-a-time, but it's nice | |
747 * to be reading in parallel. | |
748 */ | |
2885 | 749 err = dmu_buf_hold_array_by_dnode(dn, offset, mylen, |
9512
64cafcbcc337
6801810 Commit of aligned streaming rewrites to ZIL device causes unwanted disk reads
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
9412
diff
changeset
|
750 TRUE, FTAG, &numbufs, &dbp, flags); |
1544 | 751 if (err) |
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents:
4543
diff
changeset
|
752 break; |
789 | 753 |
754 for (i = 0; i < numbufs; i++) { | |
755 int tocpy; | |
756 int bufoff; | |
757 dmu_buf_t *db = dbp[i]; | |
758 | |
759 ASSERT(size > 0); | |
760 | |
761 bufoff = offset - db->db_offset; | |
762 tocpy = (int)MIN(db->db_size - bufoff, size); | |
763 | |
764 bcopy((char *)db->db_data + bufoff, buf, tocpy); | |
765 | |
766 offset += tocpy; | |
767 size -= tocpy; | |
768 buf = (char *)buf + tocpy; | |
769 } | |
1544 | 770 dmu_buf_rele_array(dbp, numbufs, FTAG); |
789 | 771 } |
2885 | 772 dnode_rele(dn, FTAG); |
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents:
4543
diff
changeset
|
773 return (err); |
789 | 774 } |
775 | |
776 void | |
777 dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, | |
778 const void *buf, dmu_tx_t *tx) | |
779 { | |
780 dmu_buf_t **dbp; | |
781 int numbufs, i; | |
782 | |
2391 | 783 if (size == 0) |
784 return; | |
785 | |
1544 | 786 VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, |
787 FALSE, FTAG, &numbufs, &dbp)); | |
789 | 788 |
789 for (i = 0; i < numbufs; i++) { | |
790 int tocpy; | |
791 int bufoff; | |
792 dmu_buf_t *db = dbp[i]; | |
793 | |
794 ASSERT(size > 0); | |
795 | |
796 bufoff = offset - db->db_offset; | |
797 tocpy = (int)MIN(db->db_size - bufoff, size); | |
798 | |
799 ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); | |
800 | |
801 if (tocpy == db->db_size) | |
802 dmu_buf_will_fill(db, tx); | |
803 else | |
804 dmu_buf_will_dirty(db, tx); | |
805 | |
806 bcopy(buf, (char *)db->db_data + bufoff, tocpy); | |
807 | |
808 if (tocpy == db->db_size) | |
809 dmu_buf_fill_done(db, tx); | |
810 | |
811 offset += tocpy; | |
812 size -= tocpy; | |
813 buf = (char *)buf + tocpy; | |
814 } | |
1544 | 815 dmu_buf_rele_array(dbp, numbufs, FTAG); |
789 | 816 } |
817 | |
7872
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
818 void |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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diff
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|
819 dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
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diff
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|
820 dmu_tx_t *tx) |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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diff
changeset
|
821 { |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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diff
changeset
|
822 dmu_buf_t **dbp; |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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parents:
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diff
changeset
|
823 int numbufs, i; |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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diff
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|
824 |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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diff
changeset
|
825 if (size == 0) |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
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diff
changeset
|
826 return; |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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parents:
7754
diff
changeset
|
827 |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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7754
diff
changeset
|
828 VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
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parents:
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diff
changeset
|
829 FALSE, FTAG, &numbufs, &dbp)); |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
830 |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
831 for (i = 0; i < numbufs; i++) { |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
832 dmu_buf_t *db = dbp[i]; |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
833 |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
834 dmu_buf_will_not_fill(db, tx); |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
835 } |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
836 dmu_buf_rele_array(dbp, numbufs, FTAG); |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
837 } |
40a9434212f6
6646775 Speed up the dumpifying process for zvols
Tim Haley <Tim.Haley@Sun.COM>
parents:
7754
diff
changeset
|
838 |
11539
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
839 /* |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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parents:
10922
diff
changeset
|
840 * DMU support for xuio |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
841 */ |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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parents:
10922
diff
changeset
|
842 kstat_t *xuio_ksp = NULL; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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diff
changeset
|
843 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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10922
diff
changeset
|
844 int |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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parents:
10922
diff
changeset
|
845 dmu_xuio_init(xuio_t *xuio, int nblk) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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diff
changeset
|
846 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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10922
diff
changeset
|
847 dmu_xuio_t *priv; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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diff
changeset
|
848 uio_t *uio = &xuio->xu_uio; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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diff
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|
849 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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diff
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|
850 uio->uio_iovcnt = nblk; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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diff
changeset
|
851 uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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diff
changeset
|
852 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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diff
changeset
|
853 priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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|
854 priv->cnt = nblk; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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diff
changeset
|
855 priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP); |
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|
856 priv->iovp = uio->uio_iov; |
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diff
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|
857 XUIO_XUZC_PRIV(xuio) = priv; |
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|
858 |
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|
859 if (XUIO_XUZC_RW(xuio) == UIO_READ) |
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|
860 XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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diff
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|
861 else |
10d35fc3d7fd
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|
862 XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk); |
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6873106 Need a mechanism to share buffers between fs modules
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diff
changeset
|
863 |
10d35fc3d7fd
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|
864 return (0); |
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|
865 } |
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6873106 Need a mechanism to share buffers between fs modules
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|
866 |
10d35fc3d7fd
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|
867 void |
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diff
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|
868 dmu_xuio_fini(xuio_t *xuio) |
10d35fc3d7fd
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869 { |
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6873106 Need a mechanism to share buffers between fs modules
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|
870 dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); |
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871 int nblk = priv->cnt; |
10d35fc3d7fd
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|
872 |
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|
873 kmem_free(priv->iovp, nblk * sizeof (iovec_t)); |
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|
874 kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *)); |
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|
875 kmem_free(priv, sizeof (dmu_xuio_t)); |
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876 |
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|
877 if (XUIO_XUZC_RW(xuio) == UIO_READ) |
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|
878 XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk); |
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|
879 else |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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parents:
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|
880 XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk); |
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|
881 } |
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6873106 Need a mechanism to share buffers between fs modules
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10922
diff
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|
882 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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|
883 /* |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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|
884 * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf } |
10d35fc3d7fd
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parents:
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diff
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|
885 * and increase priv->next by 1. |
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|
886 */ |
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6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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|
887 int |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
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diff
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|
888 dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n) |
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6873106 Need a mechanism to share buffers between fs modules
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|
889 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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|
890 struct iovec *iov; |
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|
891 uio_t *uio = &xuio->xu_uio; |
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|
892 dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); |
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|
893 int i = priv->next++; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
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parents:
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|
894 |
10d35fc3d7fd
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|
895 ASSERT(i < priv->cnt); |
10d35fc3d7fd
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10922
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|
896 ASSERT(off + n <= arc_buf_size(abuf)); |
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6873106 Need a mechanism to share buffers between fs modules
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|
897 iov = uio->uio_iov + i; |
10d35fc3d7fd
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parents:
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|
898 iov->iov_base = (char *)abuf->b_data + off; |
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|
899 iov->iov_len = n; |
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6873106 Need a mechanism to share buffers between fs modules
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parents:
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diff
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|
900 priv->bufs[i] = abuf; |
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6873106 Need a mechanism to share buffers between fs modules
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diff
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|
901 return (0); |
10d35fc3d7fd
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chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
902 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
903 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
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|
904 int |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
905 dmu_xuio_cnt(xuio_t *xuio) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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diff
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|
906 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
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|
907 dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
908 return (priv->cnt); |
10d35fc3d7fd
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chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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diff
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|
909 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
910 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
911 arc_buf_t * |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
912 dmu_xuio_arcbuf(xuio_t *xuio, int i) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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|
913 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
914 dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
915 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
916 ASSERT(i < priv->cnt); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
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|
917 return (priv->bufs[i]); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
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|
918 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
919 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
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|
920 void |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
921 dmu_xuio_clear(xuio_t *xuio, int i) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
922 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
923 dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
924 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
925 ASSERT(i < priv->cnt); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
926 priv->bufs[i] = NULL; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
927 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
928 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
929 static void |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
930 xuio_stat_init(void) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
931 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
932 xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc", |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
933 KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t), |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
934 KSTAT_FLAG_VIRTUAL); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
935 if (xuio_ksp != NULL) { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
936 xuio_ksp->ks_data = &xuio_stats; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
937 kstat_install(xuio_ksp); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
938 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
939 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
940 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
941 static void |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
942 xuio_stat_fini(void) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
943 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
944 if (xuio_ksp != NULL) { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
945 kstat_delete(xuio_ksp); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
946 xuio_ksp = NULL; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
947 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
948 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
949 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
950 void |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
951 xuio_stat_wbuf_copied() |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
952 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
953 XUIOSTAT_BUMP(xuiostat_wbuf_copied); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
954 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
955 |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
956 void |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
957 xuio_stat_wbuf_nocopy() |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
958 { |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
959 XUIOSTAT_BUMP(xuiostat_wbuf_nocopy); |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
960 } |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
961 |
789 | 962 #ifdef _KERNEL |
963 int | |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
964 dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
965 { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
966 dmu_buf_t **dbp; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
967 int numbufs, i, err; |
11539
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
968 xuio_t *xuio = NULL; |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
969 |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
970 /* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
971 * NB: we could do this block-at-a-time, but it's nice |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
972 * to be reading in parallel. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
973 */ |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
974 err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG, |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
975 &numbufs, &dbp); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
976 if (err) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
977 return (err); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
978 |
11539
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
979 if (uio->uio_extflg == UIO_XUIO) |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
980 xuio = (xuio_t *)uio; |
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
981 |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
982 for (i = 0; i < numbufs; i++) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
983 int tocpy; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
984 int bufoff; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3547
diff
changeset
|
985 dmu_buf_t *db = dbp[i]; |
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986 |
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987 ASSERT(size > 0); |
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988 |
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989 bufoff = uio->uio_loffset - db->db_offset; |
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990 tocpy = (int)MIN(db->db_size - bufoff, size); |
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991 |
11539
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|
992 if (xuio) { |
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993 dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db; |
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994 arc_buf_t *dbuf_abuf = dbi->db_buf; |
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995 arc_buf_t *abuf = dbuf_loan_arcbuf(dbi); |
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996 err = dmu_xuio_add(xuio, abuf, bufoff, tocpy); |
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997 if (!err) { |
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998 uio->uio_resid -= tocpy; |
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999 uio->uio_loffset += tocpy; |
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1000 } |
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1001 |
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1002 if (abuf == dbuf_abuf) |
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1003 XUIOSTAT_BUMP(xuiostat_rbuf_nocopy); |
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1004 else |
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1005 XUIOSTAT_BUMP(xuiostat_rbuf_copied); |
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1006 } else { |
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1007 err = uiomove((char *)db->db_data + bufoff, tocpy, |
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1008 UIO_READ, uio); |
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1009 } |
3638
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1010 if (err) |
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1011 break; |
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|
1012 |
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1013 size -= tocpy; |
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|
1014 } |
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1015 dmu_buf_rele_array(dbp, numbufs, FTAG); |
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|
1016 |
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1017 return (err); |
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|
1018 } |
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1019 |
12123
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|
1020 static int |
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1021 dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx) |
789 | 1022 { |
1023 dmu_buf_t **dbp; | |
12123
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1024 int numbufs; |
789 | 1025 int err = 0; |
12123
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1026 int i; |
789 | 1027 |
12123
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1028 err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size, |
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|
1029 FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH); |
1544 | 1030 if (err) |
1031 return (err); | |
789 | 1032 |
1033 for (i = 0; i < numbufs; i++) { | |
1034 int tocpy; | |
1035 int bufoff; | |
1036 dmu_buf_t *db = dbp[i]; | |
1037 | |
1038 ASSERT(size > 0); | |
1039 | |
3638
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1040 bufoff = uio->uio_loffset - db->db_offset; |
789 | 1041 tocpy = (int)MIN(db->db_size - bufoff, size); |
1042 | |
1043 ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); | |
1044 | |
1045 if (tocpy == db->db_size) | |
1046 dmu_buf_will_fill(db, tx); | |
1047 else | |
1048 dmu_buf_will_dirty(db, tx); | |
1049 | |
1050 /* | |
1051 * XXX uiomove could block forever (eg. nfs-backed | |
1052 * pages). There needs to be a uiolockdown() function | |
1053 * to lock the pages in memory, so that uiomove won't | |
1054 * block. | |
1055 */ | |
1056 err = uiomove((char *)db->db_data + bufoff, tocpy, | |
1057 UIO_WRITE, uio); | |
1058 | |
1059 if (tocpy == db->db_size) | |
1060 dmu_buf_fill_done(db, tx); | |
1061 | |
1062 if (err) | |
1063 break; | |
1064 | |
1065 size -= tocpy; | |
1066 } | |
12123
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1067 |
1544 | 1068 dmu_buf_rele_array(dbp, numbufs, FTAG); |
789 | 1069 return (err); |
1070 } | |
2688
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|
1071 |
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|
1072 int |
12123
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|
1073 dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size, |
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|
1074 dmu_tx_t *tx) |
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|
1075 { |
12684
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6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
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diff
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|
1076 dmu_buf_impl_t *db = (dmu_buf_impl_t *)zdb; |
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|
1077 dnode_t *dn; |
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6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1078 int err; |
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|
1079 |
12123
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|
1080 if (size == 0) |
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1081 return (0); |
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|
1082 |
12684
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|
1083 DB_DNODE_ENTER(db); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1084 dn = DB_DNODE(db); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1085 err = dmu_write_uio_dnode(dn, uio, size, tx); |
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6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1086 DB_DNODE_EXIT(db); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1087 |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1088 return (err); |
12123
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|
1089 } |
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|
1090 |
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|
1091 int |
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|
1092 dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size, |
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|
1093 dmu_tx_t *tx) |
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|
1094 { |
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|
1095 dnode_t *dn; |
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|
1096 int err; |
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|
1097 |
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|
1098 if (size == 0) |
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|
1099 return (0); |
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|
1100 |
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|
1101 err = dnode_hold(os, object, FTAG, &dn); |
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|
1102 if (err) |
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|
1103 return (err); |
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|
1104 |
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|
1105 err = dmu_write_uio_dnode(dn, uio, size, tx); |
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|
1106 |
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|
1107 dnode_rele(dn, FTAG); |
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|
1108 |
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|
1109 return (err); |
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1110 } |
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|
1111 |
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|
1112 int |
2688
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1113 dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, |
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1114 page_t *pp, dmu_tx_t *tx) |
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1115 { |
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1116 dmu_buf_t **dbp; |
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1117 int numbufs, i; |
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1118 int err; |
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1119 |
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1120 if (size == 0) |
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1121 return (0); |
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|
1122 |
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1123 err = dmu_buf_hold_array(os, object, offset, size, |
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1124 FALSE, FTAG, &numbufs, &dbp); |
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1125 if (err) |
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1126 return (err); |
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1127 |
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1128 for (i = 0; i < numbufs; i++) { |
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1129 int tocpy, copied, thiscpy; |
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|
1130 int bufoff; |
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1131 dmu_buf_t *db = dbp[i]; |
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|
1132 caddr_t va; |
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1133 |
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1134 ASSERT(size > 0); |
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1135 ASSERT3U(db->db_size, >=, PAGESIZE); |
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1136 |
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1137 bufoff = offset - db->db_offset; |
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1138 tocpy = (int)MIN(db->db_size - bufoff, size); |
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6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
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|
1139 |
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|
1140 ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); |
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|
1141 |
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|
1142 if (tocpy == db->db_size) |
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|
1143 dmu_buf_will_fill(db, tx); |
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|
1144 else |
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|
1145 dmu_buf_will_dirty(db, tx); |
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|
1146 |
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|
1147 for (copied = 0; copied < tocpy; copied += PAGESIZE) { |
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diff
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|
1148 ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); |
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diff
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|
1149 thiscpy = MIN(PAGESIZE, tocpy - copied); |
7315
cdba25672122
6735592 "zio" vmem arenas are confusing, not reported separately
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7237
diff
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|
1150 va = zfs_map_page(pp, S_READ); |
2688
12e2ad22b970
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diff
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|
1151 bcopy(va, (char *)db->db_data + bufoff, thiscpy); |
7315
cdba25672122
6735592 "zio" vmem arenas are confusing, not reported separately
Jonathan W Adams <Jonathan.Adams@Sun.COM>
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diff
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|
1152 zfs_unmap_page(pp, va); |
2688
12e2ad22b970
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parents:
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diff
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|
1153 pp = pp->p_next; |
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|
1154 bufoff += PAGESIZE; |
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|
1155 } |
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|
1156 |
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|
1157 if (tocpy == db->db_size) |
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|
1158 dmu_buf_fill_done(db, tx); |
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|
1159 |
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|
1160 offset += tocpy; |
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|
1161 size -= tocpy; |
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|
1162 } |
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|
1163 dmu_buf_rele_array(dbp, numbufs, FTAG); |
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|
1164 return (err); |
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|
1165 } |
789 | 1166 #endif |
1167 | |
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1168 /* |
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1169 * Allocate a loaned anonymous arc buffer. |
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1170 */ |
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1171 arc_buf_t * |
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1172 dmu_request_arcbuf(dmu_buf_t *handle, int size) |
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1173 { |
12684
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1174 dmu_buf_impl_t *db = (dmu_buf_impl_t *)handle; |
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1175 spa_t *spa; |
9412
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1176 |
12684
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|
1177 DB_GET_SPA(&spa, db); |
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6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1178 return (arc_loan_buf(spa, size)); |
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|
1179 } |
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|
1180 |
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|
1181 /* |
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1182 * Free a loaned arc buffer. |
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|
1183 */ |
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|
1184 void |
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|
1185 dmu_return_arcbuf(arc_buf_t *buf) |
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1186 { |
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changeset
|
1187 arc_return_buf(buf, FTAG); |
13973
4972ab336f54
3464 zfs synctask code needs restructuring
Matthew Ahrens <mahrens@delphix.com>
parents:
13952
diff
changeset
|
1188 VERIFY(arc_buf_remove_ref(buf, FTAG)); |
9412
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1189 } |
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|
1190 |
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|
1191 /* |
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|
1192 * When possible directly assign passed loaned arc buffer to a dbuf. |
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1193 * If this is not possible copy the contents of passed arc buf via |
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|
1194 * dmu_write(). |
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|
1195 */ |
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|
1196 void |
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|
1197 dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf, |
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|
1198 dmu_tx_t *tx) |
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|
1199 { |
12684
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|
1200 dmu_buf_impl_t *dbuf = (dmu_buf_impl_t *)handle; |
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|
1201 dnode_t *dn; |
9412
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|
1202 dmu_buf_impl_t *db; |
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|
1203 uint32_t blksz = (uint32_t)arc_buf_size(buf); |
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|
1204 uint64_t blkid; |
4aefd8704ce0
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|
1205 |
12684
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|
1206 DB_DNODE_ENTER(dbuf); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1207 dn = DB_DNODE(dbuf); |
9412
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|
1208 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
4aefd8704ce0
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|
1209 blkid = dbuf_whichblock(dn, offset); |
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|
1210 VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL); |
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diff
changeset
|
1211 rw_exit(&dn->dn_struct_rwlock); |
12684
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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diff
changeset
|
1212 DB_DNODE_EXIT(dbuf); |
9412
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|
1213 |
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|
1214 if (offset == db->db.db_offset && blksz == db->db.db_size) { |
4aefd8704ce0
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|
1215 dbuf_assign_arcbuf(db, buf, tx); |
4aefd8704ce0
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changeset
|
1216 dbuf_rele(db, FTAG); |
4aefd8704ce0
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diff
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|
1217 } else { |
12684
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
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diff
changeset
|
1218 objset_t *os; |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
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|
1219 uint64_t object; |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
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|
1220 |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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diff
changeset
|
1221 DB_DNODE_ENTER(dbuf); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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parents:
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diff
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|
1222 dn = DB_DNODE(dbuf); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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parents:
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diff
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|
1223 os = dn->dn_objset; |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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diff
changeset
|
1224 object = dn->dn_object; |
397e44ebb8a9
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diff
changeset
|
1225 DB_DNODE_EXIT(dbuf); |
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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|
1226 |
9412
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changeset
|
1227 dbuf_rele(db, FTAG); |
12684
397e44ebb8a9
6710343 dnode cache should register a dnode_move() callback to limit fragmentation
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diff
changeset
|
1228 dmu_write(os, object, offset, blksz, buf->b_data, tx); |
9412
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diff
changeset
|
1229 dmu_return_arcbuf(buf); |
11539
10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
10922
diff
changeset
|
1230 XUIOSTAT_BUMP(xuiostat_wbuf_copied); |
9412
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|
1231 } |
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|
1232 } |
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|
1233 |
2237 | 1234 typedef struct { |
10922
e2081f502306
PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
10810
diff
changeset
|
1235 dbuf_dirty_record_t *dsa_dr; |
e2081f502306
PSARC 2009/571 ZFS Deduplication Properties
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diff
changeset
|
1236 dmu_sync_cb_t *dsa_done; |
e2081f502306
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diff
changeset
|
1237 zgd_t *dsa_zgd; |
e2081f502306
PSARC 2009/571 ZFS Deduplication Properties
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parents:
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diff
changeset
|
1238 dmu_tx_t *dsa_tx; |
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3444
diff
changeset
|
1239 } dmu_sync_arg_t; |
2237 | 1240 |
1241 /* ARGSUSED */ | |
1242 static void | |
7754
b80e4842ad54
6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
7468
diff
changeset
|
1243 dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg) |
b80e4842ad54
6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1244 { |
10922
e2081f502306
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1245 dmu_sync_arg_t *dsa = varg; |
e2081f502306
PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1246 dmu_buf_t *db = dsa->dsa_zgd->zgd_db; |
7754
b80e4842ad54
6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1247 blkptr_t *bp = zio->io_bp; |
10800
469478b180d9
6880764 fsync on zfs is broken if writes are greater than 32kb on a hard crash and no log attached
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
10474
diff
changeset
|
1248 |
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diff
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|
1249 if (zio->io_error == 0) { |
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diff
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|
1250 if (BP_IS_HOLE(bp)) { |
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PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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|
1251 /* |
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diff
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|
1252 * A block of zeros may compress to a hole, but the |
e2081f502306
PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
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|
1253 * block size still needs to be known for replay. |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
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|
1254 */ |
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parents:
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diff
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|
1255 BP_SET_LSIZE(bp, db->db_size); |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1256 } else { |
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parents:
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diff
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|
1257 ASSERT(BP_GET_LEVEL(bp) == 0); |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1258 bp->blk_fill = 1; |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1259 } |
7754
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
7468
diff
changeset
|
1260 } |
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6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
7468
diff
changeset
|
1261 } |
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6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
7468
diff
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|
1262 |
10922
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|
1263 static void |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
10810
diff
changeset
|
1264 dmu_sync_late_arrival_ready(zio_t *zio) |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1265 { |
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|
1266 dmu_sync_ready(zio, NULL, zio->io_private); |
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PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1267 } |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1268 |
7754
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
7468
diff
changeset
|
1269 /* ARGSUSED */ |
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6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
7468
diff
changeset
|
1270 static void |
2237 | 1271 dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) |
1272 { | |
10922
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1273 dmu_sync_arg_t *dsa = varg; |
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PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1274 dbuf_dirty_record_t *dr = dsa->dsa_dr; |
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
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parents:
3444
diff
changeset
|
1275 dmu_buf_impl_t *db = dr->dr_dbuf; |
2237 | 1276 |
10810
b6b161a6ae4a
6892298 buf->b_hdr->b_state != arc_anon, file: ../../common/fs/zfs/arc.c, line: 2849
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
10800
diff
changeset
|
1277 mutex_enter(&db->db_mtx); |
b6b161a6ae4a
6892298 buf->b_hdr->b_state != arc_anon, file: ../../common/fs/zfs/arc.c, line: 2849
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
10800
diff
changeset
|
1278 ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC); |
10922
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1279 if (zio->io_error == 0) { |
13887
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1280 dr->dt.dl.dr_nopwrite = !!(zio->io_flags & ZIO_FLAG_NOPWRITE); |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1281 if (dr->dt.dl.dr_nopwrite) { |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1282 blkptr_t *bp = zio->io_bp; |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1283 blkptr_t *bp_orig = &zio->io_bp_orig; |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1284 uint8_t chksum = BP_GET_CHECKSUM(bp_orig); |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1285 |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1286 ASSERT(BP_EQUAL(bp, bp_orig)); |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1287 ASSERT(zio->io_prop.zp_compress != ZIO_COMPRESS_OFF); |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1288 ASSERT(zio_checksum_table[chksum].ci_dedup); |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
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|
1289 } |
10922
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1290 dr->dt.dl.dr_overridden_by = *zio->io_bp; |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1291 dr->dt.dl.dr_override_state = DR_OVERRIDDEN; |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1292 dr->dt.dl.dr_copies = zio->io_prop.zp_copies; |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1293 if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by)) |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
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|
1294 BP_ZERO(&dr->dt.dl.dr_overridden_by); |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
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|
1295 } else { |
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parents:
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diff
changeset
|
1296 dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN; |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents:
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diff
changeset
|
1297 } |
2237 | 1298 cv_broadcast(&db->db_changed); |
10810
b6b161a6ae4a
6892298 buf->b_hdr->b_state != arc_anon, file: ../../common/fs/zfs/arc.c, line: 2849
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
10800
diff
changeset
|
1299 mutex_exit(&db->db_mtx); |
b6b161a6ae4a
6892298 buf->b_hdr->b_state != arc_anon, file: ../../common/fs/zfs/arc.c, line: 2849
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parents:
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diff
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|
1300 |
10922
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|
1301 dsa->dsa_done(dsa->dsa_zgd, zio->io_error); |
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|
1302 |
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|
1303 kmem_free(dsa, sizeof (*dsa)); |
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PSARC 2009/571 ZFS Deduplication Properties
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diff
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|
1304 } |
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diff
changeset
|
1305 |
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diff
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|
1306 static void |
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diff
changeset
|
1307 dmu_sync_late_arrival_done(zio_t *zio) |
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|
1308 { |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
changeset
|
1309 blkptr_t *bp = zio->io_bp; |
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Jeff Bonwick <Jeff.Bonwick@Sun.COM>
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diff
changeset
|
1310 dmu_sync_arg_t *dsa = zio->io_private; |
13887
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
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13776
diff
changeset
|
1311 blkptr_t *bp_orig = &zio->io_bp_orig; |
10922
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|
1312 |
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|
1313 if (zio->io_error == 0 && !BP_IS_HOLE(bp)) { |
13887
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1314 /* |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1315 * If we didn't allocate a new block (i.e. ZIO_FLAG_NOPWRITE) |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1316 * then there is nothing to do here. Otherwise, free the |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1317 * newly allocated block in this txg. |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1318 */ |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1319 if (zio->io_flags & ZIO_FLAG_NOPWRITE) { |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1320 ASSERT(BP_EQUAL(bp, bp_orig)); |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1321 } else { |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1322 ASSERT(BP_IS_HOLE(bp_orig) || !BP_EQUAL(bp, bp_orig)); |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1323 ASSERT(zio->io_bp->blk_birth == zio->io_txg); |
196932ec9e6a
3236 zio nop-write
George Wilson <george.wilson@delphix.com>
parents:
13776
diff
changeset
|
1324 ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa)); |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1325 zio_free(zio->io_spa, zio->io_txg, zio->io_bp); |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1326 } |
10922
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|
1327 } |
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|
1328 |
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|
1329 dmu_tx_commit(dsa->dsa_tx); |
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|
1330 |
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|
1331 dsa->dsa_done(dsa->dsa_zgd, zio->io_error); |
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|
1332 |
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changeset
|
1333 kmem_free(dsa, sizeof (*dsa)); |
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|
1334 } |
3547
e396e0a440b1
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maybee
parents:
3444
diff
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|
1335 |
10922
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|
1336 static int |
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changeset
|
1337 dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd, |
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diff
changeset
|
1338 zio_prop_t *zp, zbookmark_t *zb) |
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|
1339 { |
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changeset
|
1340 dmu_sync_arg_t *dsa; |
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|
1341 dmu_tx_t *tx; |
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|
1342 |
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changeset
|
1343 tx = dmu_tx_create(os); |
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diff
changeset
|
1344 dmu_tx_hold_space(tx, zgd->zgd_db->db_size); |
11670
1d964fb5d948
6595532 ZIL is too talkative
Neil Perrin <Neil.Perrin@Sun.COM>
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11539
diff
changeset
|
1345 if (dmu_tx_assign(tx, TXG_WAIT) != 0) { |
10922
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changeset
|
1346 dmu_tx_abort(tx); |
13980
d7059eb1884c
3598 want to dtrace when errors are generated in zfs
Matthew Ahrens <mahrens@delphix.com>
parents:
13977
diff
changeset
|
1347 /* Make zl_get_data do txg_waited_synced() */ |
d7059eb1884c
3598 want to dtrace when errors are generated in zfs
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parents:
13977
diff
changeset
|
1348 return (SET_ERROR(EIO)); |
10922
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|
1349 } |
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|
1350 |
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changeset
|
1351 dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); |
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|
1352 dsa->dsa_dr = NULL; |
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changeset
|
1353 dsa->dsa_done = done; |
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|
1354 dsa->dsa_zgd = zgd; |
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changeset
|
1355 dsa->dsa_tx = tx; |
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|
1356 |
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changeset
|
1357 zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp, |
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changeset
|
1358 zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp, |
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diff
changeset
|
1359 dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa, |
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1360 ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb)); |
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1361 |
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1362 return (0); |
2237 | 1363 } |
1364 | |
789 | 1365 /* |
2237 | 1366 * Intent log support: sync the block associated with db to disk. |
1367 * N.B. and XXX: the caller is responsible for making sure that the | |
1368 * data isn't changing while dmu_sync() is writing it. | |
789 | 1369 * |
1370 * Return values: | |
1371 * | |
13887
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diff
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1372 * EEXIST: this txg has already been synced, so there's nothing to do. |
789 | 1373 * The caller should not log the write. |
1374 * | |
1375 * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. | |
1376 * The caller should not log the write. | |
1377 * | |
2237 | 1378 * EALREADY: this block is already in the process of being synced. |
1379 * The caller should track its progress (somehow). | |
789 | 1380 * |
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1381 * EIO: could not do the I/O. |
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1382 * The caller should do a txg_wait_synced(). |
789 | 1383 * |
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1384 * 0: the I/O has been initiated. |
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1385 * The caller should log this blkptr in the done callback. |
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1386 * It is possible that the I/O will fail, in which case |
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1387 * the error will be reported to the done callback and |
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|
1388 * propagated to pio from zio_done(). |
789 | 1389 */ |
1390 int | |
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|
1391 dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd) |
789 | 1392 { |
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1393 blkptr_t *bp = zgd->zgd_bp; |
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1394 dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db; |
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1395 objset_t *os = db->db_objset; |
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1396 dsl_dataset_t *ds = os->os_dsl_dataset; |
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1397 dbuf_dirty_record_t *dr; |
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1398 dmu_sync_arg_t *dsa; |
2237 | 1399 zbookmark_t zb; |
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1400 zio_prop_t zp; |
12684
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|
1401 dnode_t *dn; |
789 | 1402 |
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1403 ASSERT(pio != NULL); |
789 | 1404 ASSERT(txg != 0); |
1405 | |
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1406 SET_BOOKMARK(&zb, ds->ds_object, |
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1407 db->db.db_object, db->db_level, db->db_blkid); |
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1408 |
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|
1409 DB_DNODE_ENTER(db); |
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|
1410 dn = DB_DNODE(db); |
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|
1411 dmu_write_policy(os, dn, db->db_level, WP_DMU_SYNC, &zp); |
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|
1412 DB_DNODE_EXIT(db); |
789 | 1413 |
1414 /* | |
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1415 * If we're frozen (running ziltest), we always need to generate a bp. |
1544 | 1416 */ |
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1417 if (txg > spa_freeze_txg(os->os_spa)) |
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1418 return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); |
1544 | 1419 |
1420 /* | |
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1421 * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf() |
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1422 * and us. If we determine that this txg is not yet syncing, |
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1423 * but it begins to sync a moment later, that's OK because the |
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1424 * sync thread will block in dbuf_sync_leaf() until we drop db_mtx. |
789 | 1425 */ |
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1426 mutex_enter(&db->db_mtx); |
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1427 |
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1428 if (txg <= spa_last_synced_txg(os->os_spa)) { |
789 | 1429 /* |
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1430 * This txg has already synced. There's nothing to do. |
789 | 1431 */ |
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1432 mutex_exit(&db->db_mtx); |
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1433 return (SET_ERROR(EEXIST)); |
789 | 1434 } |
1435 | |
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1436 if (txg <= spa_syncing_txg(os->os_spa)) { |
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1437 /* |
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1438 * This txg is currently syncing, so we can't mess with |
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1439 * the dirty record anymore; just write a new log block. |
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1440 */ |
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1441 mutex_exit(&db->db_mtx); |
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1442 return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb)); |
2237 | 1443 } |
1444 | |
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1445 dr = db->db_last_dirty; |
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1446 while (dr && dr->dr_txg != txg) |
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1447 dr = dr->dr_next; |
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1448 |
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1449 if (dr == NULL) { |
2237 | 1450 /* |
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1451 * There's no dr for this dbuf, so it must have been freed. |
2237 | 1452 * There's no need to log writes to freed blocks, so we're done. |
1453 */ | |
1454 mutex_exit(&db->db_mtx); | |
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1455 return (SET_ERROR(ENOENT)); |
789 | 1456 } |
1457 | |
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1458 ASSERT(dr->dr_next == NULL || dr->dr_next->dr_txg < txg); |
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1459 |
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1460 /* |
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1461 * Assume the on-disk data is X, the current syncing data is Y, |
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1462 * and the current in-memory data is Z (currently in dmu_sync). |
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1463 * X and Z are identical but Y is has been modified. Normally, |
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1464 * when X and Z are the same we will perform a nopwrite but if Y |
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1465 * is different we must disable nopwrite since the resulting write |
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1466 * of Y to disk can free the block containing X. If we allowed a |
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1467 * nopwrite to occur the block pointing to Z would reference a freed |
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1468 * block. Since this is a rare case we simplify this by disabling |
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1469 * nopwrite if the current dmu_sync-ing dbuf has been modified in |
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1470 * a previous transaction. |
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1471 */ |
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1472 if (dr->dr_next) |
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1473 zp.zp_nopwrite = B_FALSE; |
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1474 |
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1475 ASSERT(dr->dr_txg == txg); |
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1476 if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC || |
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1477 dr->dt.dl.dr_override_state == DR_OVERRIDDEN) { |
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1478 /* |
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1479 * We have already issued a sync write for this buffer, |
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1480 * or this buffer has already been synced. It could not |
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1481 * have been dirtied since, or we would have cleared the state. |
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1482 */ |
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1483 mutex_exit(&db->db_mtx); |
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1484 return (SET_ERROR(EALREADY)); |
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1485 } |
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1486 |
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1487 ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN); |
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1488 dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC; |
2237 | 1489 mutex_exit(&db->db_mtx); |
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1490 |
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1491 dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP); |
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1492 dsa->dsa_dr = dr; |
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1493 dsa->dsa_done = done; |
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1494 dsa->dsa_zgd = zgd; |
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1495 dsa->dsa_tx = NULL; |
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1496 |
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1497 zio_nowait(arc_write(pio, os->os_spa, txg, |
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1498 bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), |
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1499 DBUF_IS_L2COMPRESSIBLE(db), &zp, dmu_sync_ready, dmu_sync_done, |
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1500 dsa, ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb)); |
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1501 |
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1502 return (0); |
789 | 1503 } |
1504 | |
1505 int | |
1506 dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, | |
1507 dmu_tx_t *tx) | |
1508 { | |
1544 | 1509 dnode_t *dn; |
1510 int err; | |
1511 | |
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|
1512 err = dnode_hold(os, object, FTAG, &dn); |
1544 | 1513 if (err) |
1514 return (err); | |
1515 err = dnode_set_blksz(dn, size, ibs, tx); | |
789 | 1516 dnode_rele(dn, FTAG); |
1517 return (err); | |
1518 } | |
1519 | |
1520 void | |
1521 dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, | |
1522 dmu_tx_t *tx) | |
1523 { | |
1544 | 1524 dnode_t *dn; |
1525 | |
1526 /* XXX assumes dnode_hold will not get an i/o error */ | |
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diff
changeset
|
1527 (void) dnode_hold(os, object, FTAG, &dn); |
789 | 1528 ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS); |
1529 dn->dn_checksum = checksum; | |
1530 dnode_setdirty(dn, tx); | |
1531 dnode_rele(dn, FTAG); | |
1532 } | |
1533 | |
1534 void | |
1535 dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, | |
1536 dmu_tx_t *tx) | |
1537 { | |
1544 | 1538 dnode_t *dn; |
1539 | |
1540 /* XXX assumes dnode_hold will not get an i/o error */ | |
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diff
changeset
|
1541 (void) dnode_hold(os, object, FTAG, &dn); |
789 | 1542 ASSERT(compress < ZIO_COMPRESS_FUNCTIONS); |
1543 dn->dn_compress = compress; | |
1544 dnode_setdirty(dn, tx); | |
1545 dnode_rele(dn, FTAG); | |
1546 } | |
1547 | |
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1548 int zfs_mdcomp_disable = 0; |
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|
1549 |
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|
1550 void |
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|
1551 dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp) |
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|
1552 { |
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|
1553 dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET; |
13700
2889e2596bd6
2619 asynchronous destruction of ZFS file systems
Christopher Siden <chris.siden@delphix.com>
parents:
12684
diff
changeset
|
1554 boolean_t ismd = (level > 0 || DMU_OT_IS_METADATA(type) || |
12493
89ce40422cea
6952177 SA handling of on-disk corruption can be improved
Mark Shellenbaum <Mark.Shellenbaum@Oracle.COM>
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diff
changeset
|
1555 (wp & WP_SPILL)); |
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|
1556 enum zio_checksum checksum = os->os_checksum; |
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|
1557 enum zio_compress compress = os->os_compress; |
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|
1558 enum zio_checksum dedup_checksum = os->os_dedup_checksum; |
13888
7204b3392a58
3236 zio nop-write (fix uninitialized variables)
George Wilson <george.wilson@delphix.com>
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13887
diff
changeset
|
1559 boolean_t dedup = B_FALSE; |
7204b3392a58
3236 zio nop-write (fix uninitialized variables)
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diff
changeset
|
1560 boolean_t nopwrite = B_FALSE; |
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1561 boolean_t dedup_verify = os->os_dedup_verify; |
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|
1562 int copies = os->os_copies; |
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|
1563 |
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|
1564 /* |
13887
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diff
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|
1565 * We maintain different write policies for each of the following |
196932ec9e6a
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diff
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|
1566 * types of data: |
196932ec9e6a
3236 zio nop-write
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diff
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|
1567 * 1. metadata |
196932ec9e6a
3236 zio nop-write
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diff
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|
1568 * 2. preallocated blocks (i.e. level-0 blocks of a dump device) |
196932ec9e6a
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diff
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|
1569 * 3. all other level 0 blocks |
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|
1570 */ |
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|
1571 if (ismd) { |
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|
1572 /* |
13887
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diff
changeset
|
1573 * XXX -- we should design a compression algorithm |
196932ec9e6a
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diff
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|
1574 * that specializes in arrays of bps. |
196932ec9e6a
3236 zio nop-write
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diff
changeset
|
1575 */ |
196932ec9e6a
3236 zio nop-write
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diff
changeset
|
1576 compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY : |
196932ec9e6a
3236 zio nop-write
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diff
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|
1577 ZIO_COMPRESS_LZJB; |
196932ec9e6a
3236 zio nop-write
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parents:
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diff
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|
1578 |
196932ec9e6a
3236 zio nop-write
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diff
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|
1579 /* |
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|
1580 * Metadata always gets checksummed. If the data |
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|
1581 * checksum is multi-bit correctable, and it's not a |
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parents:
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diff
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|
1582 * ZBT-style checksum, then it's suitable for metadata |
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|
1583 * as well. Otherwise, the metadata checksum defaults |
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|
1584 * to fletcher4. |
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|
1585 */ |
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|
1586 if (zio_checksum_table[checksum].ci_correctable < 1 || |
11670
1d964fb5d948
6595532 ZIL is too talkative
Neil Perrin <Neil.Perrin@Sun.COM>
parents:
11539
diff
changeset
|
1587 zio_checksum_table[checksum].ci_eck) |
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|
1588 checksum = ZIO_CHECKSUM_FLETCHER_4; |
13887
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1589 } else if (wp & WP_NOFILL) { |
196932ec9e6a
3236 zio nop-write
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diff
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|
1590 ASSERT(level == 0); |
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|
1591 |
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|
1592 /* |
13887
196932ec9e6a
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parents:
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diff
changeset
|
1593 * If we're writing preallocated blocks, we aren't actually |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1594 * writing them so don't set any policy properties. These |
196932ec9e6a
3236 zio nop-write
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parents:
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diff
changeset
|
1595 * blocks are currently only used by an external subsystem |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1596 * outside of zfs (i.e. dump) and not written by the zio |
196932ec9e6a
3236 zio nop-write
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parents:
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diff
changeset
|
1597 * pipeline. |
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diff
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|
1598 */ |
13887
196932ec9e6a
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diff
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|
1599 compress = ZIO_COMPRESS_OFF; |
196932ec9e6a
3236 zio nop-write
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diff
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|
1600 checksum = ZIO_CHECKSUM_OFF; |
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|
1601 } else { |
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|
1602 compress = zio_compress_select(dn->dn_compress, compress); |
13887
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diff
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|
1603 |
196932ec9e6a
3236 zio nop-write
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parents:
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diff
changeset
|
1604 checksum = (dedup_checksum == ZIO_CHECKSUM_OFF) ? |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1605 zio_checksum_select(dn->dn_checksum, checksum) : |
196932ec9e6a
3236 zio nop-write
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13776
diff
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|
1606 dedup_checksum; |
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|
1607 |
13887
196932ec9e6a
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diff
changeset
|
1608 /* |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1609 * Determine dedup setting. If we are in dmu_sync(), |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1610 * we won't actually dedup now because that's all |
196932ec9e6a
3236 zio nop-write
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diff
changeset
|
1611 * done in syncing context; but we do want to use the |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1612 * dedup checkum. If the checksum is not strong |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1613 * enough to ensure unique signatures, force |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1614 * dedup_verify. |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1615 */ |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1616 if (dedup_checksum != ZIO_CHECKSUM_OFF) { |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1617 dedup = (wp & WP_DMU_SYNC) ? B_FALSE : B_TRUE; |
196932ec9e6a
3236 zio nop-write
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13776
diff
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|
1618 if (!zio_checksum_table[checksum].ci_dedup) |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1619 dedup_verify = B_TRUE; |
196932ec9e6a
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diff
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|
1620 } |
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|
1621 |
13887
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diff
changeset
|
1622 /* |
196932ec9e6a
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13776
diff
changeset
|
1623 * Enable nopwrite if we have a cryptographically secure |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1624 * checksum that has no known collisions (i.e. SHA-256) |
196932ec9e6a
3236 zio nop-write
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diff
changeset
|
1625 * and compression is enabled. We don't enable nopwrite if |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1626 * dedup is enabled as the two features are mutually exclusive. |
196932ec9e6a
3236 zio nop-write
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parents:
13776
diff
changeset
|
1627 */ |
196932ec9e6a
3236 zio nop-write
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13776
diff
changeset
|
1628 nopwrite = (!dedup && zio_checksum_table[checksum].ci_dedup && |
196932ec9e6a
3236 zio nop-write
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diff
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|
1629 compress != ZIO_COMPRESS_OFF && zfs_nopwrite_enabled); |
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1630 } |
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|
1631 |
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|
1632 zp->zp_checksum = checksum; |
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|
1633 zp->zp_compress = compress; |
11935
538c866aaac6
6716117 ZFS needs native system attribute infrastructure
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changeset
|
1634 zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type; |
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1635 zp->zp_level = level; |
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|
1636 zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa)); |
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|
1637 zp->zp_dedup = dedup; |
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|
1638 zp->zp_dedup_verify = dedup && dedup_verify; |
13887
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changeset
|
1639 zp->zp_nopwrite = nopwrite; |
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1640 } |
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|
1641 |
1775
e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
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1731
diff
changeset
|
1642 int |
789 | 1643 dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) |
1644 { | |
1645 dnode_t *dn; | |
1646 int i, err; | |
1647 | |
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|
1648 err = dnode_hold(os, object, FTAG, &dn); |
1544 | 1649 if (err) |
1650 return (err); | |
789 | 1651 /* |
1652 * Sync any current changes before | |
1653 * we go trundling through the block pointers. | |
1654 */ | |
1655 for (i = 0; i < TXG_SIZE; i++) { | |
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
1656 if (list_link_active(&dn->dn_dirty_link[i])) |
789 | 1657 break; |
1658 } | |
1659 if (i != TXG_SIZE) { | |
1660 dnode_rele(dn, FTAG); | |
1661 txg_wait_synced(dmu_objset_pool(os), 0); | |
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|
1662 err = dnode_hold(os, object, FTAG, &dn); |
1544 | 1663 if (err) |
1664 return (err); | |
789 | 1665 } |
1666 | |
6992 | 1667 err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0); |
789 | 1668 dnode_rele(dn, FTAG); |
1669 | |
1670 return (err); | |
1671 } | |
1672 | |
1673 void | |
1674 dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) | |
1675 { | |
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1676 dnode_phys_t *dnp; |
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1677 |
789 | 1678 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
1679 mutex_enter(&dn->dn_mtx); | |
1680 | |
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1681 dnp = dn->dn_phys; |
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1682 |
789 | 1683 doi->doi_data_block_size = dn->dn_datablksz; |
1684 doi->doi_metadata_block_size = dn->dn_indblkshift ? | |
1685 1ULL << dn->dn_indblkshift : 0; | |
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1686 doi->doi_type = dn->dn_type; |
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1687 doi->doi_bonus_type = dn->dn_bonustype; |
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1688 doi->doi_bonus_size = dn->dn_bonuslen; |
789 | 1689 doi->doi_indirection = dn->dn_nlevels; |
1690 doi->doi_checksum = dn->dn_checksum; | |
1691 doi->doi_compress = dn->dn_compress; | |
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1692 doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9; |
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1693 doi->doi_max_offset = (dn->dn_maxblkid + 1) * dn->dn_datablksz; |
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1694 doi->doi_fill_count = 0; |
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1695 for (int i = 0; i < dnp->dn_nblkptr; i++) |
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1696 doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill; |
789 | 1697 |
1698 mutex_exit(&dn->dn_mtx); | |
1699 rw_exit(&dn->dn_struct_rwlock); | |
1700 } | |
1701 | |
1702 /* | |
1703 * Get information on a DMU object. | |
1704 * If doi is NULL, just indicates whether the object exists. | |
1705 */ | |
1706 int | |
1707 dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) | |
1708 { | |
1544 | 1709 dnode_t *dn; |
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1710 int err = dnode_hold(os, object, FTAG, &dn); |
789 | 1711 |
1544 | 1712 if (err) |
1713 return (err); | |
789 | 1714 |
1715 if (doi != NULL) | |
1716 dmu_object_info_from_dnode(dn, doi); | |
1717 | |
1718 dnode_rele(dn, FTAG); | |
1719 return (0); | |
1720 } | |
1721 | |
1722 /* | |
1723 * As above, but faster; can be used when you have a held dbuf in hand. | |
1724 */ | |
1725 void | |
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1726 dmu_object_info_from_db(dmu_buf_t *db_fake, dmu_object_info_t *doi) |
789 | 1727 { |
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1728 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
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1729 |
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1730 DB_DNODE_ENTER(db); |
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1731 dmu_object_info_from_dnode(DB_DNODE(db), doi); |
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1732 DB_DNODE_EXIT(db); |
789 | 1733 } |
1734 | |
1735 /* | |
1736 * Faster still when you only care about the size. | |
1737 * This is specifically optimized for zfs_getattr(). | |
1738 */ | |
1739 void | |
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1740 dmu_object_size_from_db(dmu_buf_t *db_fake, uint32_t *blksize, |
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1741 u_longlong_t *nblk512) |
789 | 1742 { |
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1743 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
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1744 dnode_t *dn; |
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1745 |
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1746 DB_DNODE_ENTER(db); |
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1747 dn = DB_DNODE(db); |
789 | 1748 |
1749 *blksize = dn->dn_datablksz; | |
2082 | 1750 /* add 1 for dnode space */ |
1751 *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> | |
1752 SPA_MINBLOCKSHIFT) + 1; | |
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1753 DB_DNODE_EXIT(db); |
789 | 1754 } |
1755 | |
1756 void | |
1757 byteswap_uint64_array(void *vbuf, size_t size) | |
1758 { | |
1759 uint64_t *buf = vbuf; | |
1760 size_t count = size >> 3; | |
1761 int i; | |
1762 | |
1763 ASSERT((size & 7) == 0); | |
1764 | |
1765 for (i = 0; i < count; i++) | |
1766 buf[i] = BSWAP_64(buf[i]); | |
1767 } | |
1768 | |
1769 void | |
1770 byteswap_uint32_array(void *vbuf, size_t size) | |
1771 { | |
1772 uint32_t *buf = vbuf; | |
1773 size_t count = size >> 2; | |
1774 int i; | |
1775 | |
1776 ASSERT((size & 3) == 0); | |
1777 | |
1778 for (i = 0; i < count; i++) | |
1779 buf[i] = BSWAP_32(buf[i]); | |
1780 } | |
1781 | |
1782 void | |
1783 byteswap_uint16_array(void *vbuf, size_t size) | |
1784 { | |
1785 uint16_t *buf = vbuf; | |
1786 size_t count = size >> 1; | |
1787 int i; | |
1788 | |
1789 ASSERT((size & 1) == 0); | |
1790 | |
1791 for (i = 0; i < count; i++) | |
1792 buf[i] = BSWAP_16(buf[i]); | |
1793 } | |
1794 | |
1795 /* ARGSUSED */ | |
1796 void | |
1797 byteswap_uint8_array(void *vbuf, size_t size) | |
1798 { | |
1799 } | |
1800 | |
1801 void | |
1802 dmu_init(void) | |
1803 { | |
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1804 zfs_dbgmsg_init(); |
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1805 sa_cache_init(); |
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1806 xuio_stat_init(); |
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1807 dmu_objset_init(); |
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1808 dnode_init(); |
789 | 1809 dbuf_init(); |
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1810 zfetch_init(); |
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1811 l2arc_init(); |
789 | 1812 arc_init(); |
1813 } | |
1814 | |
1815 void | |
1816 dmu_fini(void) | |
1817 { | |
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1818 arc_fini(); /* arc depends on l2arc, so arc must go first */ |
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1819 l2arc_fini(); |
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1820 zfetch_fini(); |
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1821 dbuf_fini(); |
789 | 1822 dnode_fini(); |
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1823 dmu_objset_fini(); |
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1824 xuio_stat_fini(); |
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1825 sa_cache_fini(); |
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1826 zfs_dbgmsg_fini(); |
789 | 1827 } |