Mercurial > illumos > illumos-gate
annotate usr/src/lib/libzfs/common/libzfs_sendrecv.c @ 11007:216d8396182e
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| author | Lori Alt <Lori.Alt@Sun.COM> |
|---|---|
| date | Mon, 09 Nov 2009 11:04:55 -0700 |
| parents | dcc7d6f9faa8 |
| children | 63ab26072e41 |
| rev | line source |
|---|---|
| 5367 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 5 * Common Development and Distribution License (the "License"). | |
| 6 * You may not use this file except in compliance with the License. | |
| 7 * | |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 | |
| 22 /* | |
|
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23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
| 5367 | 24 * Use is subject to license terms. |
| 25 */ | |
| 26 | |
| 27 #include <assert.h> | |
| 28 #include <ctype.h> | |
| 29 #include <errno.h> | |
| 30 #include <libintl.h> | |
| 31 #include <stdio.h> | |
| 32 #include <stdlib.h> | |
| 33 #include <strings.h> | |
| 34 #include <unistd.h> | |
| 35 #include <stddef.h> | |
| 36 #include <fcntl.h> | |
| 37 #include <sys/mount.h> | |
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38 #include <pthread.h> |
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39 #include <umem.h> |
| 5367 | 40 |
| 41 #include <libzfs.h> | |
| 42 | |
| 43 #include "zfs_namecheck.h" | |
| 44 #include "zfs_prop.h" | |
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45 #include "zfs_fletcher.h" |
| 5367 | 46 #include "libzfs_impl.h" |
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47 #include <sha2.h> |
| 5367 | 48 |
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49 static int zfs_receive_impl(libzfs_handle_t *, const char *, recvflags_t, |
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50 int, avl_tree_t *, char **); |
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51 |
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52 static const zio_cksum_t zero_cksum = { 0 }; |
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53 |
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54 typedef struct dedup_arg { |
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55 int inputfd; |
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56 int outputfd; |
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57 libzfs_handle_t *dedup_hdl; |
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58 } dedup_arg_t; |
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59 |
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60 typedef struct dataref { |
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61 uint64_t ref_guid; |
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62 uint64_t ref_object; |
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63 uint64_t ref_offset; |
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64 } dataref_t; |
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65 |
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66 typedef struct dedup_entry { |
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67 struct dedup_entry *dde_next; |
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68 zio_cksum_t dde_chksum; |
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69 dataref_t dde_ref; |
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70 } dedup_entry_t; |
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71 |
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72 #define MAX_DDT_PHYSMEM_PERCENT 20 |
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73 #define SMALLEST_POSSIBLE_MAX_DDT_MB 128 |
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74 |
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75 typedef struct dedup_table { |
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76 dedup_entry_t **dedup_hash_array; |
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77 umem_cache_t *ddecache; |
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78 uint64_t max_ddt_size; /* max dedup table size in bytes */ |
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79 uint64_t cur_ddt_size; /* current dedup table size in bytes */ |
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80 uint64_t ddt_count; |
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81 int numhashbits; |
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82 boolean_t ddt_full; |
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83 } dedup_table_t; |
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84 |
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85 static int |
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86 high_order_bit(uint64_t n) |
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87 { |
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88 int count; |
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89 |
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90 for (count = 0; n != 0; count++) |
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91 n >>= 1; |
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92 return (count); |
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93 } |
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94 |
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95 static size_t |
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96 ssread(void *buf, size_t len, FILE *stream) |
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97 { |
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98 size_t outlen; |
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99 |
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100 if ((outlen = fread(buf, len, 1, stream)) == 0) |
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101 return (0); |
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102 |
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103 return (outlen); |
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104 } |
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105 |
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106 static void |
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107 ddt_hash_append(libzfs_handle_t *hdl, dedup_table_t *ddt, dedup_entry_t **ddepp, |
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108 zio_cksum_t *cs, dataref_t *dr) |
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109 { |
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110 dedup_entry_t *dde; |
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111 |
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112 if (ddt->cur_ddt_size >= ddt->max_ddt_size) { |
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113 if (ddt->ddt_full == B_FALSE) { |
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114 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
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115 "Dedup table full. Deduplication will continue " |
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116 "with existing table entries")); |
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117 ddt->ddt_full = B_TRUE; |
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118 } |
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119 return; |
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120 } |
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121 |
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122 if ((dde = umem_cache_alloc(ddt->ddecache, UMEM_DEFAULT)) |
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123 != NULL) { |
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124 assert(*ddepp == NULL); |
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125 dde->dde_next = NULL; |
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126 dde->dde_chksum = *cs; |
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127 dde->dde_ref = *dr; |
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128 *ddepp = dde; |
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129 ddt->cur_ddt_size += sizeof (dedup_entry_t); |
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130 ddt->ddt_count++; |
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131 } |
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132 } |
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133 |
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134 /* |
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135 * Using the specified dedup table, do a lookup for an entry with |
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136 * the checksum cs. If found, return the block's reference info |
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137 * in *dr. Otherwise, insert a new entry in the dedup table, using |
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138 * the reference information specified by *dr. |
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139 * |
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140 * return value: true - entry was found |
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141 * false - entry was not found |
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142 */ |
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143 static boolean_t |
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144 ddt_update(libzfs_handle_t *hdl, dedup_table_t *ddt, zio_cksum_t *cs, |
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145 dataref_t *dr) |
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146 { |
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147 uint32_t hashcode; |
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148 dedup_entry_t **ddepp; |
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149 |
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150 hashcode = BF64_GET(cs->zc_word[0], 0, ddt->numhashbits); |
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151 |
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152 for (ddepp = &(ddt->dedup_hash_array[hashcode]); *ddepp != NULL; |
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153 ddepp = &((*ddepp)->dde_next)) { |
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154 if (ZIO_CHECKSUM_EQUAL(((*ddepp)->dde_chksum), *cs)) { |
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155 *dr = (*ddepp)->dde_ref; |
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156 return (B_TRUE); |
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157 } |
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158 } |
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159 ddt_hash_append(hdl, ddt, ddepp, cs, dr); |
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160 return (B_FALSE); |
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161 } |
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162 |
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163 static int |
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164 cksum_and_write(const void *buf, uint64_t len, zio_cksum_t *zc, int outfd) |
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165 { |
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166 fletcher_4_incremental_native(buf, len, zc); |
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167 return (write(outfd, buf, len)); |
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168 } |
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169 |
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170 /* |
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171 * This function is started in a separate thread when the dedup option |
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172 * has been requested. The main send thread determines the list of |
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173 * snapshots to be included in the send stream and makes the ioctl calls |
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174 * for each one. But instead of having the ioctl send the output to the |
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175 * the output fd specified by the caller of zfs_send()), the |
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176 * ioctl is told to direct the output to a pipe, which is read by the |
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177 * alternate thread running THIS function. This function does the |
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178 * dedup'ing by: |
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179 * 1. building a dedup table (the DDT) |
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180 * 2. doing checksums on each data block and inserting a record in the DDT |
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181 * 3. looking for matching checksums, and |
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182 * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever |
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183 * a duplicate block is found. |
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184 * The output of this function then goes to the output fd requested |
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185 * by the caller of zfs_send(). |
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186 */ |
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187 static void * |
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188 cksummer(void *arg) |
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189 { |
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190 dedup_arg_t *dda = arg; |
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191 char *buf = malloc(1<<20); |
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192 dmu_replay_record_t thedrr; |
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193 dmu_replay_record_t *drr = &thedrr; |
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194 struct drr_begin *drrb = &thedrr.drr_u.drr_begin; |
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195 struct drr_end *drre = &thedrr.drr_u.drr_end; |
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196 struct drr_object *drro = &thedrr.drr_u.drr_object; |
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197 struct drr_write *drrw = &thedrr.drr_u.drr_write; |
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198 FILE *ofp; |
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199 int outfd; |
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200 dmu_replay_record_t wbr_drr; |
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201 struct drr_write_byref *wbr_drrr = &wbr_drr.drr_u.drr_write_byref; |
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202 dedup_table_t ddt; |
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203 zio_cksum_t stream_cksum; |
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204 uint64_t physmem = sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE); |
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205 uint64_t numbuckets; |
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206 |
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207 ddt.max_ddt_size = |
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208 MAX((physmem * MAX_DDT_PHYSMEM_PERCENT)/100, |
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209 SMALLEST_POSSIBLE_MAX_DDT_MB<<20); |
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210 |
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211 numbuckets = ddt.max_ddt_size/(sizeof (dedup_entry_t)); |
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212 |
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213 /* |
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214 * numbuckets must be a power of 2. Increase number to |
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215 * a power of 2 if necessary. |
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216 */ |
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217 if (!ISP2(numbuckets)) |
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218 numbuckets = 1 << high_order_bit(numbuckets); |
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219 |
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220 ddt.dedup_hash_array = calloc(numbuckets, sizeof (dedup_entry_t *)); |
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221 ddt.ddecache = umem_cache_create("dde", sizeof (dedup_entry_t), 0, |
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222 NULL, NULL, NULL, NULL, NULL, 0); |
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223 ddt.cur_ddt_size = numbuckets * sizeof (dedup_entry_t *); |
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224 ddt.numhashbits = high_order_bit(numbuckets) - 1; |
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225 ddt.ddt_full = B_FALSE; |
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226 |
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227 /* Initialize the write-by-reference block. */ |
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228 wbr_drr.drr_type = DRR_WRITE_BYREF; |
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229 wbr_drr.drr_payloadlen = 0; |
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230 |
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231 outfd = dda->outputfd; |
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232 ofp = fdopen(dda->inputfd, "r"); |
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233 while (ssread(drr, sizeof (dmu_replay_record_t), ofp) != 0) { |
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234 |
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235 switch (drr->drr_type) { |
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236 case DRR_BEGIN: |
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237 { |
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238 int fflags; |
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239 ZIO_SET_CHECKSUM(&stream_cksum, 0, 0, 0, 0); |
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240 |
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241 /* set the DEDUP feature flag for this stream */ |
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242 fflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
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243 fflags |= DMU_BACKUP_FEATURE_DEDUP; |
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244 DMU_SET_FEATUREFLAGS(drrb->drr_versioninfo, fflags); |
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245 |
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246 if (cksum_and_write(drr, sizeof (dmu_replay_record_t), |
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247 &stream_cksum, outfd) == -1) |
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248 goto out; |
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249 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == |
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250 DMU_COMPOUNDSTREAM && drr->drr_payloadlen != 0) { |
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251 int sz = drr->drr_payloadlen; |
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252 |
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253 if (sz > 1<<20) { |
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254 free(buf); |
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255 buf = malloc(sz); |
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256 } |
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257 (void) ssread(buf, sz, ofp); |
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258 if (ferror(stdin)) |
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259 perror("fread"); |
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260 if (cksum_and_write(buf, sz, &stream_cksum, |
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261 outfd) == -1) |
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parents:
10960
diff
changeset
|
262 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
263 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
264 break; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
265 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
266 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
267 case DRR_END: |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
268 { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
269 /* use the recalculated checksum */ |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
270 ZIO_SET_CHECKSUM(&drre->drr_checksum, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
271 stream_cksum.zc_word[0], stream_cksum.zc_word[1], |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
272 stream_cksum.zc_word[2], stream_cksum.zc_word[3]); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
273 if ((write(outfd, drr, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
274 sizeof (dmu_replay_record_t))) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
275 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
276 break; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
277 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
278 |
|
216d8396182e
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Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
279 case DRR_OBJECT: |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
280 { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
281 if (cksum_and_write(drr, sizeof (dmu_replay_record_t), |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
282 &stream_cksum, outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
283 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
284 if (drro->drr_bonuslen > 0) { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
285 (void) ssread(buf, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
286 P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8), |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
287 ofp); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
288 if (cksum_and_write(buf, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
289 P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8), |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
290 &stream_cksum, outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
291 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
292 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
293 break; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
294 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
295 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
296 case DRR_FREEOBJECTS: |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
297 { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
298 if (cksum_and_write(drr, sizeof (dmu_replay_record_t), |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
299 &stream_cksum, outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
300 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
301 break; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
302 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
303 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
304 case DRR_WRITE: |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
305 { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
306 dataref_t dataref; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
307 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
308 (void) ssread(buf, drrw->drr_length, ofp); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
309 /* |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
310 * If the block doesn't already have a dedup |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
311 * checksum, calculate one. |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
312 */ |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
313 if (ZIO_CHECKSUM_EQUAL(drrw->drr_blkcksum, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
314 zero_cksum)) { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
315 SHA256_CTX ctx; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
316 zio_cksum_t tmpsha256; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
317 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
318 SHA256Init(&ctx); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
319 SHA256Update(&ctx, buf, drrw->drr_length); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
320 SHA256Final(&tmpsha256, &ctx); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
321 drrw->drr_blkcksum.zc_word[0] = |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
322 BE_64(tmpsha256.zc_word[0]); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
323 drrw->drr_blkcksum.zc_word[1] = |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
324 BE_64(tmpsha256.zc_word[1]); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
325 drrw->drr_blkcksum.zc_word[2] = |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
326 BE_64(tmpsha256.zc_word[2]); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
327 drrw->drr_blkcksum.zc_word[3] = |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
328 BE_64(tmpsha256.zc_word[3]); |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
329 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
330 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
331 dataref.ref_guid = drrw->drr_toguid; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
332 dataref.ref_object = drrw->drr_object; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
333 dataref.ref_offset = drrw->drr_offset; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
334 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
335 if (ddt_update(dda->dedup_hdl, &ddt, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
336 &drrw->drr_blkcksum, &dataref)) { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
337 /* block already present in stream */ |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
338 wbr_drrr->drr_object = drrw->drr_object; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
339 wbr_drrr->drr_offset = drrw->drr_offset; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
340 wbr_drrr->drr_length = drrw->drr_length; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
341 wbr_drrr->drr_toguid = drrw->drr_toguid; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
342 wbr_drrr->drr_refguid = dataref.ref_guid; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
343 wbr_drrr->drr_refobject = |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
344 dataref.ref_object; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
345 wbr_drrr->drr_refoffset = |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
346 dataref.ref_offset; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
347 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
348 wbr_drrr->drr_blkcksum = drrw->drr_blkcksum; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
349 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
350 if (cksum_and_write(&wbr_drr, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
351 sizeof (dmu_replay_record_t), &stream_cksum, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
352 outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
353 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
354 } else { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
355 /* block not previously seen */ |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
356 if (cksum_and_write(drr, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
357 sizeof (dmu_replay_record_t), &stream_cksum, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
358 outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
359 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
360 if (cksum_and_write(buf, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
361 drrw->drr_length, |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
362 &stream_cksum, outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
363 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
364 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
365 break; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
366 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
367 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
368 case DRR_FREE: |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
369 { |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
370 if (cksum_and_write(drr, sizeof (dmu_replay_record_t), |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
371 &stream_cksum, outfd) == -1) |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
372 goto out; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
373 break; |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
374 } |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
375 |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
376 default: |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
377 (void) printf("INVALID record type 0x%x\n", |
|
216d8396182e
PSARC/2009/557 ZFS send dedup
Lori Alt <Lori.Alt@Sun.COM>
parents:
10960
diff
changeset
|
378 drr->drr_type); |
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379 /* should never happen, so assert */ |
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380 assert(B_FALSE); |
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381 } |
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382 } |
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383 out: |
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384 umem_cache_destroy(ddt.ddecache); |
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385 free(ddt.dedup_hash_array); |
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386 free(buf); |
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387 (void) fclose(ofp); |
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388 |
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389 return (NULL); |
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390 } |
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391 |
| 5367 | 392 /* |
| 393 * Routines for dealing with the AVL tree of fs-nvlists | |
| 394 */ | |
| 395 typedef struct fsavl_node { | |
| 396 avl_node_t fn_node; | |
| 397 nvlist_t *fn_nvfs; | |
| 398 char *fn_snapname; | |
| 399 uint64_t fn_guid; | |
| 400 } fsavl_node_t; | |
| 401 | |
| 402 static int | |
| 403 fsavl_compare(const void *arg1, const void *arg2) | |
| 404 { | |
| 405 const fsavl_node_t *fn1 = arg1; | |
| 406 const fsavl_node_t *fn2 = arg2; | |
| 407 | |
| 408 if (fn1->fn_guid > fn2->fn_guid) | |
| 409 return (+1); | |
| 410 else if (fn1->fn_guid < fn2->fn_guid) | |
| 411 return (-1); | |
| 412 else | |
| 413 return (0); | |
| 414 } | |
| 415 | |
| 416 /* | |
| 417 * Given the GUID of a snapshot, find its containing filesystem and | |
| 418 * (optionally) name. | |
| 419 */ | |
| 420 static nvlist_t * | |
| 421 fsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname) | |
| 422 { | |
| 423 fsavl_node_t fn_find; | |
| 424 fsavl_node_t *fn; | |
| 425 | |
| 426 fn_find.fn_guid = snapguid; | |
| 427 | |
| 428 fn = avl_find(avl, &fn_find, NULL); | |
| 429 if (fn) { | |
| 430 if (snapname) | |
| 431 *snapname = fn->fn_snapname; | |
| 432 return (fn->fn_nvfs); | |
| 433 } | |
| 434 return (NULL); | |
| 435 } | |
| 436 | |
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437 static void |
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438 fsavl_destroy(avl_tree_t *avl) |
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439 { |
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440 fsavl_node_t *fn; |
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441 void *cookie; |
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442 |
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443 if (avl == NULL) |
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444 return; |
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445 |
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446 cookie = NULL; |
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447 while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL) |
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448 free(fn); |
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449 avl_destroy(avl); |
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450 free(avl); |
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451 } |
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452 |
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453 /* |
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454 * Given an nvlist, produce an avl tree of snapshots, ordered by guid |
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455 */ |
| 5367 | 456 static avl_tree_t * |
| 457 fsavl_create(nvlist_t *fss) | |
| 458 { | |
| 459 avl_tree_t *fsavl; | |
| 460 nvpair_t *fselem = NULL; | |
| 461 | |
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462 if ((fsavl = malloc(sizeof (avl_tree_t))) == NULL) |
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463 return (NULL); |
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464 |
| 5367 | 465 avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t), |
| 466 offsetof(fsavl_node_t, fn_node)); | |
| 467 | |
| 468 while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) { | |
| 469 nvlist_t *nvfs, *snaps; | |
| 470 nvpair_t *snapelem = NULL; | |
| 471 | |
| 472 VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); | |
| 473 VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); | |
| 474 | |
| 475 while ((snapelem = | |
| 476 nvlist_next_nvpair(snaps, snapelem)) != NULL) { | |
| 477 fsavl_node_t *fn; | |
| 478 uint64_t guid; | |
| 479 | |
| 480 VERIFY(0 == nvpair_value_uint64(snapelem, &guid)); | |
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481 if ((fn = malloc(sizeof (fsavl_node_t))) == NULL) { |
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482 fsavl_destroy(fsavl); |
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483 return (NULL); |
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484 } |
| 5367 | 485 fn->fn_nvfs = nvfs; |
| 486 fn->fn_snapname = nvpair_name(snapelem); | |
| 487 fn->fn_guid = guid; | |
| 488 | |
| 489 /* | |
| 490 * Note: if there are multiple snaps with the | |
| 491 * same GUID, we ignore all but one. | |
| 492 */ | |
| 493 if (avl_find(fsavl, fn, NULL) == NULL) | |
| 494 avl_add(fsavl, fn); | |
| 495 else | |
| 496 free(fn); | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 return (fsavl); | |
| 501 } | |
| 502 | |
| 503 /* | |
| 504 * Routines for dealing with the giant nvlist of fs-nvlists, etc. | |
| 505 */ | |
| 506 typedef struct send_data { | |
| 507 uint64_t parent_fromsnap_guid; | |
| 508 nvlist_t *parent_snaps; | |
| 509 nvlist_t *fss; | |
| 7265 | 510 nvlist_t *snapprops; |
| 5367 | 511 const char *fromsnap; |
| 512 const char *tosnap; | |
| 513 | |
| 514 /* | |
| 515 * The header nvlist is of the following format: | |
| 516 * { | |
| 517 * "tosnap" -> string | |
| 518 * "fromsnap" -> string (if incremental) | |
| 519 * "fss" -> { | |
| 520 * id -> { | |
| 521 * | |
| 522 * "name" -> string (full name; for debugging) | |
| 523 * "parentfromsnap" -> number (guid of fromsnap in parent) | |
| 524 * | |
| 525 * "props" -> { name -> value (only if set here) } | |
| 526 * "snaps" -> { name (lastname) -> number (guid) } | |
| 7265 | 527 * "snapprops" -> { name (lastname) -> { name -> value } } |
| 5367 | 528 * |
| 529 * "origin" -> number (guid) (if clone) | |
| 530 * "sent" -> boolean (not on-disk) | |
| 531 * } | |
| 532 * } | |
| 533 * } | |
| 534 * | |
| 535 */ | |
| 536 } send_data_t; | |
| 537 | |
| 7265 | 538 static void send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv); |
| 539 | |
| 5367 | 540 static int |
| 541 send_iterate_snap(zfs_handle_t *zhp, void *arg) | |
| 542 { | |
| 543 send_data_t *sd = arg; | |
| 544 uint64_t guid = zhp->zfs_dmustats.dds_guid; | |
| 545 char *snapname; | |
| 7265 | 546 nvlist_t *nv; |
| 5367 | 547 |
| 548 snapname = strrchr(zhp->zfs_name, '@')+1; | |
| 549 | |
| 550 VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid)); | |
| 551 /* | |
| 552 * NB: if there is no fromsnap here (it's a newly created fs in | |
| 553 * an incremental replication), we will substitute the tosnap. | |
| 554 */ | |
| 555 if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) || | |
| 556 (sd->parent_fromsnap_guid == 0 && sd->tosnap && | |
| 557 strcmp(snapname, sd->tosnap) == 0)) { | |
| 558 sd->parent_fromsnap_guid = guid; | |
| 559 } | |
| 560 | |
| 7265 | 561 VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); |
| 562 send_iterate_prop(zhp, nv); | |
| 563 VERIFY(0 == nvlist_add_nvlist(sd->snapprops, snapname, nv)); | |
| 564 nvlist_free(nv); | |
| 565 | |
| 5367 | 566 zfs_close(zhp); |
| 567 return (0); | |
| 568 } | |
| 569 | |
| 570 static void | |
| 571 send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv) | |
| 572 { | |
| 573 nvpair_t *elem = NULL; | |
| 574 | |
| 575 while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) { | |
| 576 char *propname = nvpair_name(elem); | |
| 577 zfs_prop_t prop = zfs_name_to_prop(propname); | |
| 578 nvlist_t *propnv; | |
| 579 | |
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580 if (!zfs_prop_user(propname)) { |
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581 /* |
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582 * Realistically, this should never happen. However, |
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583 * we want the ability to add DSL properties without |
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584 * needing to make incompatible version changes. We |
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585 * need to ignore unknown properties to allow older |
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586 * software to still send datasets containing these |
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587 * properties, with the unknown properties elided. |
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588 */ |
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589 if (prop == ZPROP_INVAL) |
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590 continue; |
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591 |
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592 if (zfs_prop_readonly(prop)) |
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593 continue; |
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594 } |
| 5367 | 595 |
| 596 verify(nvpair_value_nvlist(elem, &propnv) == 0); | |
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597 if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION || |
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598 prop == ZFS_PROP_REFQUOTA || |
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599 prop == ZFS_PROP_REFRESERVATION) { |
| 5367 | 600 /* these guys are modifyable, but have no source */ |
| 601 uint64_t value; | |
| 602 verify(nvlist_lookup_uint64(propnv, | |
| 603 ZPROP_VALUE, &value) == 0); | |
| 7265 | 604 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) |
| 605 continue; | |
| 5367 | 606 } else { |
| 607 char *source; | |
| 608 if (nvlist_lookup_string(propnv, | |
| 609 ZPROP_SOURCE, &source) != 0) | |
| 610 continue; | |
| 611 if (strcmp(source, zhp->zfs_name) != 0) | |
| 612 continue; | |
| 613 } | |
| 614 | |
| 615 if (zfs_prop_user(propname) || | |
| 616 zfs_prop_get_type(prop) == PROP_TYPE_STRING) { | |
| 617 char *value; | |
| 618 verify(nvlist_lookup_string(propnv, | |
| 619 ZPROP_VALUE, &value) == 0); | |
| 620 VERIFY(0 == nvlist_add_string(nv, propname, value)); | |
| 621 } else { | |
| 622 uint64_t value; | |
| 623 verify(nvlist_lookup_uint64(propnv, | |
| 624 ZPROP_VALUE, &value) == 0); | |
| 625 VERIFY(0 == nvlist_add_uint64(nv, propname, value)); | |
| 626 } | |
| 627 } | |
| 628 } | |
| 629 | |
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630 /* |
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631 * recursively generate nvlists describing datasets. See comment |
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632 * for the data structure send_data_t above for description of contents |
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633 * of the nvlist. |
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634 */ |
| 5367 | 635 static int |
| 636 send_iterate_fs(zfs_handle_t *zhp, void *arg) | |
| 637 { | |
| 638 send_data_t *sd = arg; | |
| 639 nvlist_t *nvfs, *nv; | |
| 640 int rv; | |
| 641 uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid; | |
| 642 uint64_t guid = zhp->zfs_dmustats.dds_guid; | |
| 643 char guidstring[64]; | |
| 644 | |
| 645 VERIFY(0 == nvlist_alloc(&nvfs, NV_UNIQUE_NAME, 0)); | |
| 646 VERIFY(0 == nvlist_add_string(nvfs, "name", zhp->zfs_name)); | |
| 647 VERIFY(0 == nvlist_add_uint64(nvfs, "parentfromsnap", | |
| 648 sd->parent_fromsnap_guid)); | |
| 649 | |
| 650 if (zhp->zfs_dmustats.dds_origin[0]) { | |
| 651 zfs_handle_t *origin = zfs_open(zhp->zfs_hdl, | |
| 652 zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT); | |
| 653 if (origin == NULL) | |
| 654 return (-1); | |
| 655 VERIFY(0 == nvlist_add_uint64(nvfs, "origin", | |
| 656 origin->zfs_dmustats.dds_guid)); | |
| 657 } | |
| 658 | |
| 659 /* iterate over props */ | |
| 660 VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); | |
| 661 send_iterate_prop(zhp, nv); | |
| 662 VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv)); | |
| 663 nvlist_free(nv); | |
| 664 | |
| 665 /* iterate over snaps, and set sd->parent_fromsnap_guid */ | |
| 666 sd->parent_fromsnap_guid = 0; | |
| 667 VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0)); | |
| 7265 | 668 VERIFY(0 == nvlist_alloc(&sd->snapprops, NV_UNIQUE_NAME, 0)); |
| 5367 | 669 (void) zfs_iter_snapshots(zhp, send_iterate_snap, sd); |
| 670 VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps)); | |
| 7265 | 671 VERIFY(0 == nvlist_add_nvlist(nvfs, "snapprops", sd->snapprops)); |
| 5367 | 672 nvlist_free(sd->parent_snaps); |
| 7265 | 673 nvlist_free(sd->snapprops); |
| 5367 | 674 |
| 675 /* add this fs to nvlist */ | |
| 676 (void) snprintf(guidstring, sizeof (guidstring), | |
| 677 "0x%llx", (longlong_t)guid); | |
| 678 VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs)); | |
| 679 nvlist_free(nvfs); | |
| 680 | |
| 681 /* iterate over children */ | |
| 682 rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd); | |
| 683 | |
| 684 sd->parent_fromsnap_guid = parent_fromsnap_guid_save; | |
| 685 | |
| 686 zfs_close(zhp); | |
| 687 return (rv); | |
| 688 } | |
| 689 | |
| 690 static int | |
| 691 gather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap, | |
| 692 const char *tosnap, nvlist_t **nvlp, avl_tree_t **avlp) | |
| 693 { | |
| 694 zfs_handle_t *zhp; | |
| 695 send_data_t sd = { 0 }; | |
| 696 int error; | |
| 697 | |
| 698 zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); | |
| 699 if (zhp == NULL) | |
| 700 return (EZFS_BADTYPE); | |
| 701 | |
| 702 VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0)); | |
| 703 sd.fromsnap = fromsnap; | |
| 704 sd.tosnap = tosnap; | |
|
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705 |
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706 if ((error = send_iterate_fs(zhp, &sd)) != 0) { |
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707 nvlist_free(sd.fss); |
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708 if (avlp != NULL) |
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709 *avlp = NULL; |
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710 *nvlp = NULL; |
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711 return (error); |
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712 } |
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713 |
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714 if (avlp != NULL && (*avlp = fsavl_create(sd.fss)) == NULL) { |
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715 nvlist_free(sd.fss); |
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716 *nvlp = NULL; |
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717 return (EZFS_NOMEM); |
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718 } |
| 5367 | 719 |
| 720 *nvlp = sd.fss; | |
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721 return (0); |
| 5367 | 722 } |
| 723 | |
| 724 /* | |
| 725 * Routines for dealing with the sorted snapshot functionality | |
| 726 */ | |
| 727 typedef struct zfs_node { | |
| 728 zfs_handle_t *zn_handle; | |
| 729 avl_node_t zn_avlnode; | |
| 730 } zfs_node_t; | |
| 731 | |
| 732 static int | |
| 733 zfs_sort_snaps(zfs_handle_t *zhp, void *data) | |
| 734 { | |
| 735 avl_tree_t *avl = data; | |
| 736 zfs_node_t *node = zfs_alloc(zhp->zfs_hdl, sizeof (zfs_node_t)); | |
| 737 | |
| 738 node->zn_handle = zhp; | |
| 739 avl_add(avl, node); | |
| 740 return (0); | |
| 741 } | |
| 742 | |
| 743 /* ARGSUSED */ | |
| 744 static int | |
| 745 zfs_snapshot_compare(const void *larg, const void *rarg) | |
| 746 { | |
| 747 zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle; | |
| 748 zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle; | |
| 749 uint64_t lcreate, rcreate; | |
| 750 | |
| 751 /* | |
| 752 * Sort them according to creation time. We use the hidden | |
| 753 * CREATETXG property to get an absolute ordering of snapshots. | |
| 754 */ | |
| 755 lcreate = zfs_prop_get_int(l, ZFS_PROP_CREATETXG); | |
| 756 rcreate = zfs_prop_get_int(r, ZFS_PROP_CREATETXG); | |
| 757 | |
| 758 if (lcreate < rcreate) | |
| 759 return (-1); | |
| 760 else if (lcreate > rcreate) | |
| 761 return (+1); | |
| 762 else | |
| 763 return (0); | |
| 764 } | |
| 765 | |
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766 int |
| 5367 | 767 zfs_iter_snapshots_sorted(zfs_handle_t *zhp, zfs_iter_f callback, void *data) |
| 768 { | |
| 769 int ret = 0; | |
| 770 zfs_node_t *node; | |
| 771 avl_tree_t avl; | |
| 772 void *cookie = NULL; | |
| 773 | |
| 774 avl_create(&avl, zfs_snapshot_compare, | |
| 775 sizeof (zfs_node_t), offsetof(zfs_node_t, zn_avlnode)); | |
| 776 | |
| 777 ret = zfs_iter_snapshots(zhp, zfs_sort_snaps, &avl); | |
| 778 | |
| 779 for (node = avl_first(&avl); node != NULL; node = AVL_NEXT(&avl, node)) | |
| 780 ret |= callback(node->zn_handle, data); | |
| 781 | |
| 782 while ((node = avl_destroy_nodes(&avl, &cookie)) != NULL) | |
| 783 free(node); | |
| 784 | |
| 785 avl_destroy(&avl); | |
| 786 | |
| 787 return (ret); | |
| 788 } | |
| 789 | |
| 790 /* | |
| 791 * Routines specific to "zfs send" | |
| 792 */ | |
| 793 typedef struct send_dump_data { | |
| 794 /* these are all just the short snapname (the part after the @) */ | |
| 795 const char *fromsnap; | |
| 796 const char *tosnap; | |
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797 char prevsnap[ZFS_MAXNAMELEN]; |
| 5367 | 798 boolean_t seenfrom, seento, replicate, doall, fromorigin; |
| 799 boolean_t verbose; | |
| 800 int outfd; | |
| 801 boolean_t err; | |
| 802 nvlist_t *fss; | |
| 803 avl_tree_t *fsavl; | |
|
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804 snapfilter_cb_t *filter_cb; |
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805 void *filter_cb_arg; |
| 5367 | 806 } send_dump_data_t; |
| 807 | |
| 808 /* | |
| 809 * Dumps a backup of the given snapshot (incremental from fromsnap if it's not | |
| 810 * NULL) to the file descriptor specified by outfd. | |
| 811 */ | |
| 812 static int | |
| 813 dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, boolean_t fromorigin, | |
| 814 int outfd) | |
| 815 { | |
| 816 zfs_cmd_t zc = { 0 }; | |
| 817 libzfs_handle_t *hdl = zhp->zfs_hdl; | |
| 818 | |
| 819 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); | |
| 820 assert(fromsnap == NULL || fromsnap[0] == '\0' || !fromorigin); | |
| 821 | |
| 822 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); | |
| 823 if (fromsnap) | |
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824 (void) strlcpy(zc.zc_value, fromsnap, sizeof (zc.zc_value)); |
| 5367 | 825 zc.zc_cookie = outfd; |
| 826 zc.zc_obj = fromorigin; | |
| 827 | |
| 828 if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SEND, &zc) != 0) { | |
| 829 char errbuf[1024]; | |
| 830 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 831 "warning: cannot send '%s'"), zhp->zfs_name); | |
| 832 | |
| 833 switch (errno) { | |
| 834 | |
| 835 case EXDEV: | |
| 836 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 837 "not an earlier snapshot from the same fs")); | |
| 838 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); | |
| 839 | |
| 840 case ENOENT: | |
| 841 if (zfs_dataset_exists(hdl, zc.zc_name, | |
| 842 ZFS_TYPE_SNAPSHOT)) { | |
| 843 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 844 "incremental source (@%s) does not exist"), | |
| 845 zc.zc_value); | |
| 846 } | |
| 847 return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
| 848 | |
| 849 case EDQUOT: | |
| 850 case EFBIG: | |
| 851 case EIO: | |
| 852 case ENOLINK: | |
| 853 case ENOSPC: | |
| 854 case ENOSTR: | |
| 855 case ENXIO: | |
| 856 case EPIPE: | |
| 857 case ERANGE: | |
| 858 case EFAULT: | |
| 859 case EROFS: | |
| 860 zfs_error_aux(hdl, strerror(errno)); | |
| 861 return (zfs_error(hdl, EZFS_BADBACKUP, errbuf)); | |
| 862 | |
| 863 default: | |
| 864 return (zfs_standard_error(hdl, errno, errbuf)); | |
| 865 } | |
| 866 } | |
| 867 | |
| 868 return (0); | |
| 869 } | |
| 870 | |
| 871 static int | |
| 872 dump_snapshot(zfs_handle_t *zhp, void *arg) | |
| 873 { | |
| 874 send_dump_data_t *sdd = arg; | |
| 875 const char *thissnap; | |
| 876 int err; | |
| 877 | |
| 878 thissnap = strchr(zhp->zfs_name, '@') + 1; | |
| 879 | |
| 880 if (sdd->fromsnap && !sdd->seenfrom && | |
| 881 strcmp(sdd->fromsnap, thissnap) == 0) { | |
| 882 sdd->seenfrom = B_TRUE; | |
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883 (void) strcpy(sdd->prevsnap, thissnap); |
| 5367 | 884 zfs_close(zhp); |
| 885 return (0); | |
| 886 } | |
| 887 | |
| 888 if (sdd->seento || !sdd->seenfrom) { | |
| 889 zfs_close(zhp); | |
| 890 return (0); | |
| 891 } | |
| 892 | |
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893 if (strcmp(sdd->tosnap, thissnap) == 0) |
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894 sdd->seento = B_TRUE; |
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895 |
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896 /* |
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897 * If a filter function exists, call it to determine whether |
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898 * this snapshot will be sent. |
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899 */ |
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900 if (sdd->filter_cb != NULL && |
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901 sdd->filter_cb(zhp, sdd->filter_cb_arg) == B_FALSE) { |
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902 /* |
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903 * This snapshot is filtered out. Don't send it, and don't |
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904 * set prevsnap, so it will be as if this snapshot didn't |
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905 * exist, and the next accepted snapshot will be sent as |
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906 * an incremental from the last accepted one, or as the |
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907 * first (and full) snapshot in the case of a replication, |
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908 * non-incremental send. |
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909 */ |
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910 zfs_close(zhp); |
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911 return (0); |
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912 } |
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913 |
| 5367 | 914 /* send it */ |
| 915 if (sdd->verbose) { | |
| 916 (void) fprintf(stderr, "sending from @%s to %s\n", | |
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917 sdd->prevsnap, zhp->zfs_name); |
| 5367 | 918 } |
| 919 | |
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920 err = dump_ioctl(zhp, sdd->prevsnap, |
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921 sdd->prevsnap[0] == '\0' && (sdd->fromorigin || sdd->replicate), |
| 5367 | 922 sdd->outfd); |
| 923 | |
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924 (void) strcpy(sdd->prevsnap, thissnap); |
| 5367 | 925 zfs_close(zhp); |
| 926 return (err); | |
| 927 } | |
| 928 | |
| 929 static int | |
| 930 dump_filesystem(zfs_handle_t *zhp, void *arg) | |
| 931 { | |
| 932 int rv = 0; | |
| 933 send_dump_data_t *sdd = arg; | |
| 934 boolean_t missingfrom = B_FALSE; | |
| 935 zfs_cmd_t zc = { 0 }; | |
| 936 | |
| 937 (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", | |
| 938 zhp->zfs_name, sdd->tosnap); | |
| 939 if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) { | |
| 940 (void) fprintf(stderr, "WARNING: " | |
| 941 "could not send %s@%s: does not exist\n", | |
| 942 zhp->zfs_name, sdd->tosnap); | |
| 943 sdd->err = B_TRUE; | |
| 944 return (0); | |
| 945 } | |
| 946 | |
| 947 if (sdd->replicate && sdd->fromsnap) { | |
| 948 /* | |
| 949 * If this fs does not have fromsnap, and we're doing | |
| 950 * recursive, we need to send a full stream from the | |
| 951 * beginning (or an incremental from the origin if this | |
| 952 * is a clone). If we're doing non-recursive, then let | |
| 953 * them get the error. | |
| 954 */ | |
| 955 (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", | |
| 956 zhp->zfs_name, sdd->fromsnap); | |
| 957 if (ioctl(zhp->zfs_hdl->libzfs_fd, | |
| 958 ZFS_IOC_OBJSET_STATS, &zc) != 0) { | |
| 959 missingfrom = B_TRUE; | |
| 960 } | |
| 961 } | |
| 962 | |
| 963 if (sdd->doall) { | |
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964 sdd->seenfrom = sdd->seento = sdd->prevsnap[0] = 0; |
| 5367 | 965 if (sdd->fromsnap == NULL || missingfrom) |
| 966 sdd->seenfrom = B_TRUE; | |
| 967 | |
| 968 rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg); | |
| 969 if (!sdd->seenfrom) { | |
| 970 (void) fprintf(stderr, | |
| 971 "WARNING: could not send %s@%s:\n" | |
| 972 "incremental source (%s@%s) does not exist\n", | |
| 973 zhp->zfs_name, sdd->tosnap, | |
| 974 zhp->zfs_name, sdd->fromsnap); | |
| 975 sdd->err = B_TRUE; | |
| 976 } else if (!sdd->seento) { | |
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977 if (sdd->fromsnap) { |
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978 (void) fprintf(stderr, |
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979 "WARNING: could not send %s@%s:\n" |
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980 "incremental source (%s@%s) " |
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981 "is not earlier than it\n", |
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982 zhp->zfs_name, sdd->tosnap, |
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983 zhp->zfs_name, sdd->fromsnap); |
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984 } else { |
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985 (void) fprintf(stderr, "WARNING: " |
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986 "could not send %s@%s: does not exist\n", |
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987 zhp->zfs_name, sdd->tosnap); |
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988 } |
| 5367 | 989 sdd->err = B_TRUE; |
| 990 } | |
| 991 } else { | |
| 992 zfs_handle_t *snapzhp; | |
| 993 char snapname[ZFS_MAXNAMELEN]; | |
| 994 | |
| 995 (void) snprintf(snapname, sizeof (snapname), "%s@%s", | |
| 996 zfs_get_name(zhp), sdd->tosnap); | |
| 997 snapzhp = zfs_open(zhp->zfs_hdl, snapname, ZFS_TYPE_SNAPSHOT); | |
| 6476 | 998 if (snapzhp == NULL) { |
| 999 rv = -1; | |
| 1000 } else { | |
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1001 if (sdd->filter_cb == NULL || |
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|
1002 sdd->filter_cb(snapzhp, sdd->filter_cb_arg) == |
|
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|
1003 B_TRUE) { |
|
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diff
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|
1004 rv = dump_ioctl(snapzhp, |
|
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|
1005 missingfrom ? NULL : sdd->fromsnap, |
|
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|
1006 sdd->fromorigin || missingfrom, |
|
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|
1007 sdd->outfd); |
|
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|
1008 } |
| 6476 | 1009 sdd->seento = B_TRUE; |
| 1010 zfs_close(snapzhp); | |
| 1011 } | |
| 5367 | 1012 } |
| 1013 | |
| 1014 return (rv); | |
| 1015 } | |
| 1016 | |
| 1017 static int | |
| 1018 dump_filesystems(zfs_handle_t *rzhp, void *arg) | |
| 1019 { | |
| 1020 send_dump_data_t *sdd = arg; | |
| 1021 nvpair_t *fspair; | |
| 1022 boolean_t needagain, progress; | |
| 1023 | |
| 1024 if (!sdd->replicate) | |
| 1025 return (dump_filesystem(rzhp, sdd)); | |
| 1026 | |
| 1027 again: | |
| 1028 needagain = progress = B_FALSE; | |
| 1029 for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; | |
| 1030 fspair = nvlist_next_nvpair(sdd->fss, fspair)) { | |
| 1031 nvlist_t *fslist; | |
| 1032 char *fsname; | |
| 1033 zfs_handle_t *zhp; | |
| 1034 int err; | |
| 1035 uint64_t origin_guid = 0; | |
| 1036 nvlist_t *origin_nv; | |
| 1037 | |
| 1038 VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0); | |
| 1039 if (nvlist_lookup_boolean(fslist, "sent") == 0) | |
| 1040 continue; | |
| 1041 | |
| 1042 VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0); | |
| 1043 (void) nvlist_lookup_uint64(fslist, "origin", &origin_guid); | |
| 1044 | |
| 1045 origin_nv = fsavl_find(sdd->fsavl, origin_guid, NULL); | |
| 1046 if (origin_nv && | |
| 1047 nvlist_lookup_boolean(origin_nv, "sent") == ENOENT) { | |
|
11007
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diff
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|
1048 /* |
|
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|
1049 * origin has not been sent yet; |
|
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diff
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|
1050 * skip this clone. |
|
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diff
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|
1051 */ |
|
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diff
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|
1052 needagain = B_TRUE; |
|
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diff
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|
1053 continue; |
| 5367 | 1054 } |
| 1055 | |
| 1056 zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET); | |
| 6476 | 1057 if (zhp == NULL) |
| 1058 return (-1); | |
| 5367 | 1059 err = dump_filesystem(zhp, sdd); |
| 1060 VERIFY(nvlist_add_boolean(fslist, "sent") == 0); | |
| 1061 progress = B_TRUE; | |
| 1062 zfs_close(zhp); | |
| 1063 if (err) | |
| 1064 return (err); | |
| 1065 } | |
| 1066 if (needagain) { | |
| 1067 assert(progress); | |
| 1068 goto again; | |
| 1069 } | |
| 1070 return (0); | |
| 1071 } | |
| 1072 | |
| 1073 /* | |
|
10200
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diff
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|
1074 * Generate a send stream for the dataset identified by the argument zhp. |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
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parents:
10195
diff
changeset
|
1075 * |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
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parents:
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diff
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|
1076 * The content of the send stream is the snapshot identified by |
|
636e9ab433b8
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Lori Alt <Lori.Alt@Sun.COM>
parents:
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diff
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|
1077 * 'tosnap'. Incremental streams are requested in two ways: |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
Lori Alt <Lori.Alt@Sun.COM>
parents:
10195
diff
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|
1078 * - from the snapshot identified by "fromsnap" (if non-null) or |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
Lori Alt <Lori.Alt@Sun.COM>
parents:
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diff
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|
1079 * - from the origin of the dataset identified by zhp, which must |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
Lori Alt <Lori.Alt@Sun.COM>
parents:
10195
diff
changeset
|
1080 * be a clone. In this case, "fromsnap" is null and "fromorigin" |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
Lori Alt <Lori.Alt@Sun.COM>
parents:
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diff
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|
1081 * is TRUE. |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
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diff
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|
1082 * |
|
636e9ab433b8
6858551 zfs receive did not mount all filesystems
Lori Alt <Lori.Alt@Sun.COM>
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diff
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|
1083 * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and |
|
11007
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diff
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|
1084 * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM) |
|
10200
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6858551 zfs receive did not mount all filesystems
Lori Alt <Lori.Alt@Sun.COM>
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diff
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|
1085 * if "replicate" is set. If "doall" is set, dump all the intermediate |
|
11007
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diff
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|
1086 * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall" |
|
10200
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diff
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|
1087 * case too. |
| 5367 | 1088 */ |
| 1089 int | |
| 1090 zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap, | |
|
11007
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diff
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|
1091 sendflags_t flags, int outfd, snapfilter_cb_t filter_func, |
|
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diff
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|
1092 void *cb_arg) |
| 5367 | 1093 { |
| 1094 char errbuf[1024]; | |
| 1095 send_dump_data_t sdd = { 0 }; | |
| 1096 int err; | |
| 1097 nvlist_t *fss = NULL; | |
| 1098 avl_tree_t *fsavl = NULL; | |
|
10342
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6833815 scheduled snapshots deleted per snapshot policy can lead to replication failures
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diff
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|
1099 char holdtag[128]; |
|
108f0058f837
6833815 scheduled snapshots deleted per snapshot policy can lead to replication failures
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10302
diff
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|
1100 static uint64_t holdseq; |
|
10735
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diff
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|
1101 int spa_version; |
|
336fb268ea6f
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diff
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|
1102 boolean_t holdsnaps = B_FALSE; |
|
11007
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|
1103 pthread_t tid; |
|
216d8396182e
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diff
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|
1104 int pipefd[2]; |
|
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diff
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|
1105 dedup_arg_t dda = { 0 }; |
|
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diff
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|
1106 int featureflags = 0; |
| 5367 | 1107 |
| 1108 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 1109 "cannot send '%s'"), zhp->zfs_name); | |
| 1110 | |
| 1111 if (fromsnap && fromsnap[0] == '\0') { | |
| 1112 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, | |
| 1113 "zero-length incremental source")); | |
| 1114 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); | |
| 1115 } | |
| 1116 | |
|
10735
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parents:
10602
diff
changeset
|
1117 if (zfs_spa_version(zhp, &spa_version) == 0 && |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1118 spa_version >= SPA_VERSION_USERREFS) |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
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parents:
10602
diff
changeset
|
1119 holdsnaps = B_TRUE; |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
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10602
diff
changeset
|
1120 |
|
11007
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|
1121 if (flags.dedup) { |
|
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diff
changeset
|
1122 featureflags |= DMU_BACKUP_FEATURE_DEDUP; |
|
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diff
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|
1123 if (err = pipe(pipefd)) { |
|
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|
1124 zfs_error_aux(zhp->zfs_hdl, strerror(errno)); |
|
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|
1125 return (zfs_error(zhp->zfs_hdl, EZFS_PIPEFAILED, |
|
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diff
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|
1126 errbuf)); |
|
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|
1127 } |
|
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|
1128 dda.outputfd = outfd; |
|
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|
1129 dda.inputfd = pipefd[1]; |
|
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diff
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|
1130 dda.dedup_hdl = zhp->zfs_hdl; |
|
216d8396182e
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diff
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|
1131 if (err = pthread_create(&tid, NULL, cksummer, &dda)) { |
|
216d8396182e
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diff
changeset
|
1132 (void) close(pipefd[0]); |
|
216d8396182e
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diff
changeset
|
1133 (void) close(pipefd[1]); |
|
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|
1134 zfs_error_aux(zhp->zfs_hdl, strerror(errno)); |
|
216d8396182e
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diff
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|
1135 return (zfs_error(zhp->zfs_hdl, |
|
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diff
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|
1136 EZFS_THREADCREATEFAILED, errbuf)); |
|
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diff
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|
1137 } |
|
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changeset
|
1138 } |
|
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|
1139 |
|
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changeset
|
1140 if (flags.replicate || flags.doall) { |
| 5367 | 1141 dmu_replay_record_t drr = { 0 }; |
| 1142 char *packbuf = NULL; | |
| 1143 size_t buflen = 0; | |
| 1144 zio_cksum_t zc = { 0 }; | |
| 1145 | |
|
11007
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|
1146 assert(fromsnap || flags.doall); |
| 5367 | 1147 |
|
10735
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10602
diff
changeset
|
1148 if (holdsnaps) { |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
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10602
diff
changeset
|
1149 (void) snprintf(holdtag, sizeof (holdtag), |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
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10602
diff
changeset
|
1150 ".send-%d-%llu", getpid(), (u_longlong_t)holdseq); |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
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10602
diff
changeset
|
1151 ++holdseq; |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1152 err = zfs_hold_range(zhp, fromsnap, tosnap, |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1153 holdtag, B_TRUE); |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
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diff
changeset
|
1154 if (err) |
|
11007
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|
1155 goto err_out; |
|
10735
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diff
changeset
|
1156 } |
|
11007
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|
1157 |
|
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changeset
|
1158 |
|
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changeset
|
1159 if (flags.replicate) { |
| 5367 | 1160 nvlist_t *hdrnv; |
| 1161 | |
| 1162 VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0)); | |
| 1163 if (fromsnap) { | |
| 1164 VERIFY(0 == nvlist_add_string(hdrnv, | |
| 1165 "fromsnap", fromsnap)); | |
| 1166 } | |
| 1167 VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap)); | |
| 1168 | |
| 1169 err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name, | |
| 1170 fromsnap, tosnap, &fss, &fsavl); | |
|
10342
108f0058f837
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10302
diff
changeset
|
1171 if (err) { |
|
10735
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Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1172 if (holdsnaps) { |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
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10602
diff
changeset
|
1173 (void) zfs_release_range(zhp, fromsnap, |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
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10602
diff
changeset
|
1174 tosnap, holdtag); |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
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diff
changeset
|
1175 } |
|
11007
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changeset
|
1176 goto err_out; |
|
10342
108f0058f837
6833815 scheduled snapshots deleted per snapshot policy can lead to replication failures
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parents:
10302
diff
changeset
|
1177 } |
| 5367 | 1178 VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss)); |
| 1179 err = nvlist_pack(hdrnv, &packbuf, &buflen, | |
| 1180 NV_ENCODE_XDR, 0); | |
| 1181 nvlist_free(hdrnv); | |
| 1182 if (err) { | |
| 1183 fsavl_destroy(fsavl); | |
| 1184 nvlist_free(fss); | |
|
10735
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1185 if (holdsnaps) { |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1186 (void) zfs_release_range(zhp, fromsnap, |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1187 tosnap, holdtag); |
|
336fb268ea6f
6885860 zfs send shouldn't require support for snapshot holds
Chris Kirby <chris.kirby@sun.com>
parents:
10602
diff
changeset
|
1188 } |
|
11007
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diff
changeset
|
1189 goto stderr_out; |
| 5367 | 1190 } |
| 1191 } | |
| 1192 | |
| 1193 /* write first begin record */ | |
| 1194 drr.drr_type = DRR_BEGIN; | |
| 1195 drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
|
11007
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changeset
|
1196 DMU_SET_STREAM_HDRTYPE(drr.drr_u.drr_begin.drr_versioninfo, |
|
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|
1197 DMU_COMPOUNDSTREAM); |
|
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1198 DMU_SET_FEATUREFLAGS(drr.drr_u.drr_begin.drr_versioninfo, |
|
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1199 featureflags); |
| 5367 | 1200 (void) snprintf(drr.drr_u.drr_begin.drr_toname, |
| 1201 sizeof (drr.drr_u.drr_begin.drr_toname), | |
| 1202 "%s@%s", zhp->zfs_name, tosnap); | |
| 1203 drr.drr_payloadlen = buflen; | |
|
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1204 err = cksum_and_write(&drr, sizeof (drr), &zc, outfd); |
| 5367 | 1205 |
| 1206 /* write header nvlist */ | |
|
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1207 if (err != -1 && flags.replicate) { |
|
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|
1208 err = cksum_and_write(packbuf, buflen, &zc, outfd); |
| 5367 | 1209 } |
| 1210 free(packbuf); | |
| 1211 if (err == -1) { | |
| 1212 fsavl_destroy(fsavl); | |
| 1213 nvlist_free(fss); | |
|
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1214 if (holdsnaps) { |
|
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1215 (void) zfs_release_range(zhp, fromsnap, tosnap, |
|
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1216 holdtag); |
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1217 } |
|
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1218 err = errno; |
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1219 goto stderr_out; |
| 5367 | 1220 } |
| 1221 | |
| 1222 /* write end record */ | |
| 1223 if (err != -1) { | |
| 1224 bzero(&drr, sizeof (drr)); | |
| 1225 drr.drr_type = DRR_END; | |
| 1226 drr.drr_u.drr_end.drr_checksum = zc; | |
| 1227 err = write(outfd, &drr, sizeof (drr)); | |
| 1228 if (err == -1) { | |
| 1229 fsavl_destroy(fsavl); | |
| 1230 nvlist_free(fss); | |
|
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1231 if (holdsnaps) { |
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1232 (void) zfs_release_range(zhp, fromsnap, |
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1233 tosnap, holdtag); |
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1234 } |
|
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1235 err = errno; |
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1236 goto stderr_out; |
| 5367 | 1237 } |
| 1238 } | |
| 1239 } | |
| 1240 | |
| 1241 /* dump each stream */ | |
| 1242 sdd.fromsnap = fromsnap; | |
| 1243 sdd.tosnap = tosnap; | |
|
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1244 if (flags.dedup) |
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1245 sdd.outfd = pipefd[0]; |
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1246 else |
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1247 sdd.outfd = outfd; |
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1248 sdd.replicate = flags.replicate; |
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1249 sdd.doall = flags.doall; |
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1250 sdd.fromorigin = flags.fromorigin; |
| 5367 | 1251 sdd.fss = fss; |
| 1252 sdd.fsavl = fsavl; | |
|
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1253 sdd.verbose = flags.verbose; |
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1254 sdd.filter_cb = filter_func; |
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1255 sdd.filter_cb_arg = cb_arg; |
| 5367 | 1256 err = dump_filesystems(zhp, &sdd); |
| 1257 fsavl_destroy(fsavl); | |
| 1258 nvlist_free(fss); | |
| 1259 | |
|
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1260 if (flags.dedup) { |
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1261 (void) close(pipefd[0]); |
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1262 (void) pthread_join(tid, NULL); |
|
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1263 } |
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1264 if (flags.replicate || flags.doall) { |
| 5367 | 1265 /* |
| 1266 * write final end record. NB: want to do this even if | |
| 1267 * there was some error, because it might not be totally | |
| 1268 * failed. | |
| 1269 */ | |
| 1270 dmu_replay_record_t drr = { 0 }; | |
| 1271 drr.drr_type = DRR_END; | |
|
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1272 if (holdsnaps) { |
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1273 (void) zfs_release_range(zhp, fromsnap, tosnap, |
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1274 holdtag); |
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1275 } |
| 5367 | 1276 if (write(outfd, &drr, sizeof (drr)) == -1) { |
| 1277 return (zfs_standard_error(zhp->zfs_hdl, | |
| 1278 errno, errbuf)); | |
| 1279 } | |
| 1280 } | |
| 1281 | |
| 1282 return (err || sdd.err); | |
|
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1283 |
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1284 stderr_out: |
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1285 err = zfs_standard_error(zhp->zfs_hdl, err, errbuf); |
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1286 err_out: |
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1287 if (flags.dedup) { |
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1288 (void) pthread_cancel(tid); |
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1289 (void) pthread_join(tid, NULL); |
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1290 (void) close(pipefd[0]); |
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1291 } |
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1292 return (err); |
| 5367 | 1293 } |
| 1294 | |
| 1295 /* | |
| 1296 * Routines specific to "zfs recv" | |
| 1297 */ | |
| 1298 | |
| 1299 static int | |
| 1300 recv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen, | |
| 1301 boolean_t byteswap, zio_cksum_t *zc) | |
| 1302 { | |
| 1303 char *cp = buf; | |
| 1304 int rv; | |
| 1305 int len = ilen; | |
| 1306 | |
| 1307 do { | |
| 1308 rv = read(fd, cp, len); | |
| 1309 cp += rv; | |
| 1310 len -= rv; | |
| 1311 } while (rv > 0); | |
| 1312 | |
| 1313 if (rv < 0 || len != 0) { | |
| 1314 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 1315 "failed to read from stream")); | |
| 1316 return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN, | |
| 1317 "cannot receive"))); | |
| 1318 } | |
| 1319 | |
| 1320 if (zc) { | |
| 1321 if (byteswap) | |
| 1322 fletcher_4_incremental_byteswap(buf, ilen, zc); | |
| 1323 else | |
| 1324 fletcher_4_incremental_native(buf, ilen, zc); | |
| 1325 } | |
| 1326 return (0); | |
| 1327 } | |
| 1328 | |
| 1329 static int | |
| 1330 recv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp, | |
| 1331 boolean_t byteswap, zio_cksum_t *zc) | |
| 1332 { | |
| 1333 char *buf; | |
| 1334 int err; | |
| 1335 | |
| 1336 buf = zfs_alloc(hdl, len); | |
| 1337 if (buf == NULL) | |
| 1338 return (ENOMEM); | |
| 1339 | |
| 1340 err = recv_read(hdl, fd, buf, len, byteswap, zc); | |
| 1341 if (err != 0) { | |
| 1342 free(buf); | |
| 1343 return (err); | |
| 1344 } | |
| 1345 | |
| 1346 err = nvlist_unpack(buf, len, nvp, 0); | |
| 1347 free(buf); | |
| 1348 if (err != 0) { | |
| 1349 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
| 1350 "stream (malformed nvlist)")); | |
| 1351 return (EINVAL); | |
| 1352 } | |
| 1353 return (0); | |
| 1354 } | |
| 1355 | |
| 1356 static int | |
| 1357 recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname, | |
| 1358 int baselen, char *newname, recvflags_t flags) | |
| 1359 { | |
| 1360 static int seq; | |
| 1361 zfs_cmd_t zc = { 0 }; | |
| 1362 int err; | |
|
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1363 prop_changelist_t *clp; |
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1364 zfs_handle_t *zhp; |
| 5367 | 1365 |
|
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1366 zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); |
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1367 if (zhp == NULL) |
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1368 return (-1); |
|
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1369 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, |
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1370 flags.force ? MS_FORCE : 0); |
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1371 zfs_close(zhp); |
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1372 if (clp == NULL) |
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1373 return (-1); |
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1374 err = changelist_prefix(clp); |
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1375 if (err) |
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1376 return (err); |
| 5367 | 1377 |
|
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1378 zc.zc_objset_type = DMU_OST_ZFS; |
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1379 (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); |
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1380 |
| 5367 | 1381 if (tryname) { |
| 1382 (void) strcpy(newname, tryname); | |
| 1383 | |
| 1384 (void) strlcpy(zc.zc_value, tryname, sizeof (zc.zc_value)); | |
| 1385 | |
| 1386 if (flags.verbose) { | |
| 1387 (void) printf("attempting rename %s to %s\n", | |
| 1388 zc.zc_name, zc.zc_value); | |
| 1389 } | |
| 1390 err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); | |
|
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1391 if (err == 0) |
| 5367 | 1392 changelist_rename(clp, name, tryname); |
| 1393 } else { | |
| 1394 err = ENOENT; | |
| 1395 } | |
| 1396 | |
| 1397 if (err != 0 && strncmp(name+baselen, "recv-", 5) != 0) { | |
| 1398 seq++; | |
| 1399 | |
| 1400 (void) strncpy(newname, name, baselen); | |
| 1401 (void) snprintf(newname+baselen, ZFS_MAXNAMELEN-baselen, | |
| 1402 "recv-%u-%u", getpid(), seq); | |
| 1403 (void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value)); | |
| 1404 | |
| 1405 if (flags.verbose) { | |
| 1406 (void) printf("failed - trying rename %s to %s\n", | |
| 1407 zc.zc_name, zc.zc_value); | |
| 1408 } | |
| 1409 err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); | |
|
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1410 if (err == 0) |
| 5367 | 1411 changelist_rename(clp, name, newname); |
| 1412 if (err && flags.verbose) { | |
| 1413 (void) printf("failed (%u) - " | |
| 1414 "will try again on next pass\n", errno); | |
| 1415 } | |
| 1416 err = EAGAIN; | |
| 1417 } else if (flags.verbose) { | |
| 1418 if (err == 0) | |
| 1419 (void) printf("success\n"); | |
| 1420 else | |
| 1421 (void) printf("failed (%u)\n", errno); | |
| 1422 } | |
| 1423 | |
|
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1424 (void) changelist_postfix(clp); |
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1425 changelist_free(clp); |
| 5367 | 1426 |
| 1427 return (err); | |
| 1428 } | |
| 1429 | |
| 1430 static int | |
| 1431 recv_destroy(libzfs_handle_t *hdl, const char *name, int baselen, | |
| 1432 char *newname, recvflags_t flags) | |
| 1433 { | |
| 1434 zfs_cmd_t zc = { 0 }; | |
|
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1435 int err = 0; |
|
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1436 prop_changelist_t *clp; |
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1437 zfs_handle_t *zhp; |
|
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1438 boolean_t defer = B_FALSE; |
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1439 int spa_version; |
|
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1440 |
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1441 zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); |
|
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1442 if (zhp == NULL) |
|
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1443 return (-1); |
|
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1444 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, |
|
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1445 flags.force ? MS_FORCE : 0); |
|
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1446 if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && |
|
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1447 zfs_spa_version(zhp, &spa_version) == 0 && |
|
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1448 spa_version >= SPA_VERSION_USERREFS) |
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1449 defer = B_TRUE; |
|
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1450 zfs_close(zhp); |
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1451 if (clp == NULL) |
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1452 return (-1); |
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1453 err = changelist_prefix(clp); |
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1454 if (err) |
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1455 return (err); |
| 5367 | 1456 |
| 1457 zc.zc_objset_type = DMU_OST_ZFS; | |
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1458 zc.zc_defer_destroy = defer; |
| 5367 | 1459 (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); |
| 1460 | |
| 1461 if (flags.verbose) | |
| 1462 (void) printf("attempting destroy %s\n", zc.zc_name); | |
| 1463 err = ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc); | |
|
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1464 if (err == 0) { |
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1465 if (flags.verbose) |
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1466 (void) printf("success\n"); |
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1467 changelist_remove(clp, zc.zc_name); |
| 5367 | 1468 } |
| 1469 | |
|
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1470 (void) changelist_postfix(clp); |
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1471 changelist_free(clp); |
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1472 |
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1473 /* |
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1474 * Deferred destroy should always succeed. Since we can't tell |
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1475 * if it destroyed the dataset or just marked it for deferred |
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1476 * destroy, always do the rename just in case. |
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1477 */ |
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1478 if (err != 0 || defer) |
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1479 err = recv_rename(hdl, name, NULL, baselen, newname, flags); |
| 5367 | 1480 |
| 1481 return (err); | |
| 1482 } | |
| 1483 | |
| 1484 typedef struct guid_to_name_data { | |
| 1485 uint64_t guid; | |
| 1486 char *name; | |
| 1487 } guid_to_name_data_t; | |
| 1488 | |
| 1489 static int | |
| 1490 guid_to_name_cb(zfs_handle_t *zhp, void *arg) | |
| 1491 { | |
| 1492 guid_to_name_data_t *gtnd = arg; | |
| 1493 int err; | |
| 1494 | |
| 1495 if (zhp->zfs_dmustats.dds_guid == gtnd->guid) { | |
| 1496 (void) strcpy(gtnd->name, zhp->zfs_name); | |
| 1497 return (EEXIST); | |
| 1498 } | |
| 1499 err = zfs_iter_children(zhp, guid_to_name_cb, gtnd); | |
| 1500 zfs_close(zhp); | |
| 1501 return (err); | |
| 1502 } | |
| 1503 | |
| 1504 static int | |
| 1505 guid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid, | |
| 1506 char *name) | |
| 1507 { | |
| 1508 /* exhaustive search all local snapshots */ | |
| 1509 guid_to_name_data_t gtnd; | |
| 1510 int err = 0; | |
| 1511 zfs_handle_t *zhp; | |
| 1512 char *cp; | |
| 1513 | |
| 1514 gtnd.guid = guid; | |
| 1515 gtnd.name = name; | |
| 1516 | |
| 1517 if (strchr(parent, '@') == NULL) { | |
| 1518 zhp = make_dataset_handle(hdl, parent); | |
| 1519 if (zhp != NULL) { | |
| 1520 err = zfs_iter_children(zhp, guid_to_name_cb, >nd); | |
| 1521 zfs_close(zhp); | |
| 1522 if (err == EEXIST) | |
| 1523 return (0); | |
| 1524 } | |
| 1525 } | |
| 1526 | |
| 1527 cp = strchr(parent, '/'); | |
| 1528 if (cp) | |
| 1529 *cp = '\0'; | |
| 1530 zhp = make_dataset_handle(hdl, parent); | |
| 1531 if (cp) | |
| 1532 *cp = '/'; | |
| 1533 | |
| 1534 if (zhp) { | |
| 1535 err = zfs_iter_children(zhp, guid_to_name_cb, >nd); | |
| 1536 zfs_close(zhp); | |
| 1537 } | |
| 1538 | |
| 1539 return (err == EEXIST ? 0 : ENOENT); | |
| 1540 | |
| 1541 } | |
| 1542 | |
| 1543 /* | |
| 1544 * Return true if dataset guid1 is created before guid2. | |
| 1545 */ | |
| 6476 | 1546 static int |
| 5367 | 1547 created_before(libzfs_handle_t *hdl, avl_tree_t *avl, |
| 1548 uint64_t guid1, uint64_t guid2) | |
| 1549 { | |
| 1550 nvlist_t *nvfs; | |
| 1551 char *fsname, *snapname; | |
| 1552 char buf[ZFS_MAXNAMELEN]; | |
| 6476 | 1553 int rv; |
| 5367 | 1554 zfs_node_t zn1, zn2; |
| 1555 | |
| 1556 if (guid2 == 0) | |
| 6476 | 1557 return (0); |
| 5367 | 1558 if (guid1 == 0) |
| 6476 | 1559 return (1); |
| 5367 | 1560 |
| 1561 nvfs = fsavl_find(avl, guid1, &snapname); | |
| 1562 VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
| 1563 (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); | |
| 1564 zn1.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); | |
| 6476 | 1565 if (zn1.zn_handle == NULL) |
| 1566 return (-1); | |
| 5367 | 1567 |
| 1568 nvfs = fsavl_find(avl, guid2, &snapname); | |
| 1569 VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
| 1570 (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); | |
| 1571 zn2.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); | |
| 6476 | 1572 if (zn2.zn_handle == NULL) { |
| 1573 zfs_close(zn2.zn_handle); | |
| 1574 return (-1); | |
| 1575 } | |
| 5367 | 1576 |
| 1577 rv = (zfs_snapshot_compare(&zn1, &zn2) == -1); | |
| 1578 | |
| 1579 zfs_close(zn1.zn_handle); | |
| 1580 zfs_close(zn2.zn_handle); | |
| 1581 | |
| 1582 return (rv); | |
| 1583 } | |
| 1584 | |
| 1585 static int | |
| 1586 recv_incremental_replication(libzfs_handle_t *hdl, const char *tofs, | |
| 1587 recvflags_t flags, nvlist_t *stream_nv, avl_tree_t *stream_avl) | |
| 1588 { | |
| 1589 nvlist_t *local_nv; | |
| 1590 avl_tree_t *local_avl; | |
| 1591 nvpair_t *fselem, *nextfselem; | |
| 1592 char *tosnap, *fromsnap; | |
| 1593 char newname[ZFS_MAXNAMELEN]; | |
| 1594 int error; | |
| 1595 boolean_t needagain, progress; | |
|
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|
1596 char *s1, *s2; |
| 5367 | 1597 |
| 1598 VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap)); | |
| 1599 VERIFY(0 == nvlist_lookup_string(stream_nv, "tosnap", &tosnap)); | |
| 1600 | |
| 1601 if (flags.dryrun) | |
| 1602 return (0); | |
| 1603 | |
| 1604 again: | |
| 1605 needagain = progress = B_FALSE; | |
| 1606 | |
| 1607 if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL, | |
| 1608 &local_nv, &local_avl)) != 0) | |
| 1609 return (error); | |
| 1610 | |
| 1611 /* | |
| 1612 * Process deletes and renames | |
| 1613 */ | |
| 1614 for (fselem = nvlist_next_nvpair(local_nv, NULL); | |
| 1615 fselem; fselem = nextfselem) { | |
| 1616 nvlist_t *nvfs, *snaps; | |
| 1617 nvlist_t *stream_nvfs = NULL; | |
| 1618 nvpair_t *snapelem, *nextsnapelem; | |
| 1619 uint64_t fromguid = 0; | |
| 1620 uint64_t originguid = 0; | |
| 1621 uint64_t stream_originguid = 0; | |
| 1622 uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid; | |
| 1623 char *fsname, *stream_fsname; | |
| 1624 | |
| 1625 nextfselem = nvlist_next_nvpair(local_nv, fselem); | |
| 1626 | |
| 1627 VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); | |
| 1628 VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); | |
| 1629 VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
| 1630 VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap", | |
| 1631 &parent_fromsnap_guid)); | |
| 1632 (void) nvlist_lookup_uint64(nvfs, "origin", &originguid); | |
| 1633 | |
| 1634 /* | |
| 1635 * First find the stream's fs, so we can check for | |
| 1636 * a different origin (due to "zfs promote") | |
| 1637 */ | |
| 1638 for (snapelem = nvlist_next_nvpair(snaps, NULL); | |
| 1639 snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) { | |
| 1640 uint64_t thisguid; | |
| 1641 | |
| 1642 VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); | |
| 1643 stream_nvfs = fsavl_find(stream_avl, thisguid, NULL); | |
| 1644 | |
| 1645 if (stream_nvfs != NULL) | |
| 1646 break; | |
| 1647 } | |
| 1648 | |
| 1649 /* check for promote */ | |
| 1650 (void) nvlist_lookup_uint64(stream_nvfs, "origin", | |
| 1651 &stream_originguid); | |
| 1652 if (stream_nvfs && originguid != stream_originguid) { | |
| 6476 | 1653 switch (created_before(hdl, local_avl, |
| 1654 stream_originguid, originguid)) { | |
| 1655 case 1: { | |
| 5367 | 1656 /* promote it! */ |
| 1657 zfs_cmd_t zc = { 0 }; | |
| 1658 nvlist_t *origin_nvfs; | |
| 1659 char *origin_fsname; | |
| 1660 | |
| 1661 if (flags.verbose) | |
| 1662 (void) printf("promoting %s\n", fsname); | |
| 1663 | |
| 1664 origin_nvfs = fsavl_find(local_avl, originguid, | |
| 1665 NULL); | |
| 1666 VERIFY(0 == nvlist_lookup_string(origin_nvfs, | |
| 1667 "name", &origin_fsname)); | |
| 1668 (void) strlcpy(zc.zc_value, origin_fsname, | |
| 1669 sizeof (zc.zc_value)); | |
| 1670 (void) strlcpy(zc.zc_name, fsname, | |
| 1671 sizeof (zc.zc_name)); | |
| 1672 error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); | |
| 1673 if (error == 0) | |
| 1674 progress = B_TRUE; | |
| 6476 | 1675 break; |
| 1676 } | |
| 1677 default: | |
| 1678 break; | |
| 1679 case -1: | |
| 1680 fsavl_destroy(local_avl); | |
| 1681 nvlist_free(local_nv); | |
| 1682 return (-1); | |
| 5367 | 1683 } |
| 1684 /* | |
| 1685 * We had/have the wrong origin, therefore our | |
| 1686 * list of snapshots is wrong. Need to handle | |
| 1687 * them on the next pass. | |
| 1688 */ | |
| 1689 needagain = B_TRUE; | |
| 1690 continue; | |
| 1691 } | |
| 1692 | |
| 1693 for (snapelem = nvlist_next_nvpair(snaps, NULL); | |
| 1694 snapelem; snapelem = nextsnapelem) { | |
| 1695 uint64_t thisguid; | |
| 1696 char *stream_snapname; | |
| 7265 | 1697 nvlist_t *found, *props; |
| 5367 | 1698 |
| 1699 nextsnapelem = nvlist_next_nvpair(snaps, snapelem); | |
| 1700 | |
| 1701 VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); | |
| 1702 found = fsavl_find(stream_avl, thisguid, | |
| 1703 &stream_snapname); | |
| 1704 | |
| 1705 /* check for delete */ | |
| 1706 if (found == NULL) { | |
| 1707 char name[ZFS_MAXNAMELEN]; | |
| 1708 | |
| 1709 if (!flags.force) | |
| 1710 continue; | |
| 1711 | |
| 1712 (void) snprintf(name, sizeof (name), "%s@%s", | |
| 1713 fsname, nvpair_name(snapelem)); | |
| 1714 | |
| 1715 error = recv_destroy(hdl, name, | |
| 1716 strlen(fsname)+1, newname, flags); | |
| 1717 if (error) | |
| 1718 needagain = B_TRUE; | |
| 1719 else | |
| 1720 progress = B_TRUE; | |
| 1721 continue; | |
| 1722 } | |
| 1723 | |
| 1724 stream_nvfs = found; | |
| 1725 | |
| 7265 | 1726 if (0 == nvlist_lookup_nvlist(stream_nvfs, "snapprops", |
| 1727 &props) && 0 == nvlist_lookup_nvlist(props, | |
| 1728 stream_snapname, &props)) { | |
| 1729 zfs_cmd_t zc = { 0 }; | |
| 1730 | |
| 1731 zc.zc_cookie = B_TRUE; /* clear current props */ | |
|
7273
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6701797 want user properties on snapshots (fix lint)
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7265
diff
changeset
|
1732 (void) snprintf(zc.zc_name, sizeof (zc.zc_name), |
| 7265 | 1733 "%s@%s", fsname, nvpair_name(snapelem)); |
| 1734 if (zcmd_write_src_nvlist(hdl, &zc, | |
| 1735 props) == 0) { | |
| 1736 (void) zfs_ioctl(hdl, | |
| 1737 ZFS_IOC_SET_PROP, &zc); | |
| 1738 zcmd_free_nvlists(&zc); | |
| 1739 } | |
| 1740 } | |
| 1741 | |
| 5367 | 1742 /* check for different snapname */ |
| 1743 if (strcmp(nvpair_name(snapelem), | |
| 1744 stream_snapname) != 0) { | |
| 1745 char name[ZFS_MAXNAMELEN]; | |
| 1746 char tryname[ZFS_MAXNAMELEN]; | |
| 1747 | |
| 1748 (void) snprintf(name, sizeof (name), "%s@%s", | |
| 1749 fsname, nvpair_name(snapelem)); | |
| 1750 (void) snprintf(tryname, sizeof (name), "%s@%s", | |
| 1751 fsname, stream_snapname); | |
| 1752 | |
| 1753 error = recv_rename(hdl, name, tryname, | |
| 1754 strlen(fsname)+1, newname, flags); | |
| 1755 if (error) | |
| 1756 needagain = B_TRUE; | |
| 1757 else | |
| 1758 progress = B_TRUE; | |
| 1759 } | |
| 1760 | |
| 1761 if (strcmp(stream_snapname, fromsnap) == 0) | |
| 1762 fromguid = thisguid; | |
| 1763 } | |
| 1764 | |
| 1765 /* check for delete */ | |
| 1766 if (stream_nvfs == NULL) { | |
| 1767 if (!flags.force) | |
| 1768 continue; | |
| 1769 | |
| 1770 error = recv_destroy(hdl, fsname, strlen(tofs)+1, | |
| 1771 newname, flags); | |
| 1772 if (error) | |
| 1773 needagain = B_TRUE; | |
| 1774 else | |
| 1775 progress = B_TRUE; | |
| 1776 continue; | |
| 1777 } | |
| 1778 | |
| 1779 if (fromguid == 0 && flags.verbose) { | |
| 1780 (void) printf("local fs %s does not have fromsnap " | |
| 1781 "(%s in stream); must have been deleted locally; " | |
| 1782 "ignoring\n", fsname, fromsnap); | |
| 1783 continue; | |
| 1784 } | |
| 1785 | |
| 1786 VERIFY(0 == nvlist_lookup_string(stream_nvfs, | |
| 1787 "name", &stream_fsname)); | |
| 1788 VERIFY(0 == nvlist_lookup_uint64(stream_nvfs, | |
| 1789 "parentfromsnap", &stream_parent_fromsnap_guid)); | |
| 1790 | |
|
10302
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10299
diff
changeset
|
1791 s1 = strrchr(fsname, '/'); |
|
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parents:
10299
diff
changeset
|
1792 s2 = strrchr(stream_fsname, '/'); |
|
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6696858 zfs receive of incremental replication stream can dereference NULL pointer and crash (fix lint)
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parents:
10299
diff
changeset
|
1793 |
| 5367 | 1794 /* check for rename */ |
| 1795 if ((stream_parent_fromsnap_guid != 0 && | |
| 1796 stream_parent_fromsnap_guid != parent_fromsnap_guid) || | |
|
10302
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10299
diff
changeset
|
1797 ((s1 != NULL) && (s2 != NULL) && strcmp(s1, s2) != 0)) { |
| 5367 | 1798 nvlist_t *parent; |
| 1799 char tryname[ZFS_MAXNAMELEN]; | |
| 1800 | |
| 1801 parent = fsavl_find(local_avl, | |
| 1802 stream_parent_fromsnap_guid, NULL); | |
| 1803 /* | |
| 1804 * NB: parent might not be found if we used the | |
| 1805 * tosnap for stream_parent_fromsnap_guid, | |
| 1806 * because the parent is a newly-created fs; | |
| 1807 * we'll be able to rename it after we recv the | |
| 1808 * new fs. | |
| 1809 */ | |
| 1810 if (parent != NULL) { | |
| 1811 char *pname; | |
| 1812 | |
| 1813 VERIFY(0 == nvlist_lookup_string(parent, "name", | |
| 1814 &pname)); | |
| 1815 (void) snprintf(tryname, sizeof (tryname), | |
| 1816 "%s%s", pname, strrchr(stream_fsname, '/')); | |
| 1817 } else { | |
| 1818 tryname[0] = '\0'; | |
| 1819 if (flags.verbose) { | |
| 1820 (void) printf("local fs %s new parent " | |
| 1821 "not found\n", fsname); | |
| 1822 } | |
| 1823 } | |
| 1824 | |
| 1825 error = recv_rename(hdl, fsname, tryname, | |
| 1826 strlen(tofs)+1, newname, flags); | |
| 1827 if (error) | |
| 1828 needagain = B_TRUE; | |
| 1829 else | |
| 1830 progress = B_TRUE; | |
| 1831 } | |
| 1832 } | |
| 1833 | |
| 1834 fsavl_destroy(local_avl); | |
| 1835 nvlist_free(local_nv); | |
| 1836 | |
| 1837 if (needagain && progress) { | |
| 1838 /* do another pass to fix up temporary names */ | |
| 1839 if (flags.verbose) | |
| 1840 (void) printf("another pass:\n"); | |
| 1841 goto again; | |
| 1842 } | |
| 1843 | |
| 1844 return (needagain); | |
| 1845 } | |
| 1846 | |
| 1847 static int | |
| 1848 zfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname, | |
|
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Tim Haley <Tim.Haley@Sun.COM>
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1849 recvflags_t flags, dmu_replay_record_t *drr, zio_cksum_t *zc, |
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|
1850 char **top_zfs) |
| 5367 | 1851 { |
| 1852 nvlist_t *stream_nv = NULL; | |
| 1853 avl_tree_t *stream_avl = NULL; | |
| 1854 char *fromsnap = NULL; | |
| 1855 char tofs[ZFS_MAXNAMELEN]; | |
| 1856 char errbuf[1024]; | |
| 1857 dmu_replay_record_t drre; | |
| 1858 int error; | |
| 1859 boolean_t anyerr = B_FALSE; | |
| 6479 | 1860 boolean_t softerr = B_FALSE; |
| 5367 | 1861 |
| 1862 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 1863 "cannot receive")); | |
| 1864 | |
| 1865 if (strchr(destname, '@')) { | |
| 1866 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 1867 "can not specify snapshot name for multi-snapshot stream")); | |
| 1868 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
| 1869 } | |
| 1870 | |
| 1871 assert(drr->drr_type == DRR_BEGIN); | |
| 1872 assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC); | |
|
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1873 assert(DMU_GET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo) == |
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1874 DMU_COMPOUNDSTREAM); |
| 5367 | 1875 |
| 1876 /* | |
| 1877 * Read in the nvlist from the stream. | |
| 1878 */ | |
| 1879 if (drr->drr_payloadlen != 0) { | |
| 1880 if (!flags.isprefix) { | |
| 1881 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 1882 "must use -d to receive replication " | |
| 1883 "(send -R) stream")); | |
| 1884 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
| 1885 } | |
| 1886 | |
| 1887 error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen, | |
| 1888 &stream_nv, flags.byteswap, zc); | |
| 1889 if (error) { | |
| 1890 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
| 1891 goto out; | |
| 1892 } | |
| 1893 } | |
| 1894 | |
| 1895 /* | |
| 1896 * Read in the end record and verify checksum. | |
| 1897 */ | |
| 1898 if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre), | |
| 1899 flags.byteswap, NULL))) | |
| 1900 goto out; | |
| 1901 if (flags.byteswap) { | |
| 1902 drre.drr_type = BSWAP_32(drre.drr_type); | |
| 1903 drre.drr_u.drr_end.drr_checksum.zc_word[0] = | |
| 1904 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]); | |
| 1905 drre.drr_u.drr_end.drr_checksum.zc_word[1] = | |
| 1906 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]); | |
| 1907 drre.drr_u.drr_end.drr_checksum.zc_word[2] = | |
| 1908 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]); | |
| 1909 drre.drr_u.drr_end.drr_checksum.zc_word[3] = | |
| 1910 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]); | |
| 1911 } | |
| 1912 if (drre.drr_type != DRR_END) { | |
| 1913 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
| 1914 goto out; | |
| 1915 } | |
| 1916 if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) { | |
| 1917 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 1918 "incorrect header checksum")); | |
| 1919 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
| 1920 goto out; | |
| 1921 } | |
| 1922 | |
| 1923 (void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap); | |
| 1924 | |
| 1925 if (drr->drr_payloadlen != 0) { | |
| 1926 nvlist_t *stream_fss; | |
| 1927 | |
| 1928 VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss", | |
| 1929 &stream_fss)); | |
|
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1930 if ((stream_avl = fsavl_create(stream_fss)) == NULL) { |
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1931 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
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1932 "couldn't allocate avl tree")); |
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1933 error = zfs_error(hdl, EZFS_NOMEM, errbuf); |
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1934 goto out; |
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1935 } |
| 5367 | 1936 |
| 1937 if (fromsnap != NULL) { | |
| 1938 (void) strlcpy(tofs, destname, ZFS_MAXNAMELEN); | |
| 1939 if (flags.isprefix) { | |
| 1940 int i = strcspn(drr->drr_u.drr_begin.drr_toname, | |
| 1941 "/@"); | |
| 1942 /* zfs_receive_one() will create_parents() */ | |
| 1943 (void) strlcat(tofs, | |
| 1944 &drr->drr_u.drr_begin.drr_toname[i], | |
| 1945 ZFS_MAXNAMELEN); | |
| 1946 *strchr(tofs, '@') = '\0'; | |
| 1947 } | |
| 6479 | 1948 softerr = recv_incremental_replication(hdl, tofs, |
| 5367 | 1949 flags, stream_nv, stream_avl); |
| 1950 } | |
| 1951 } | |
| 1952 | |
| 1953 | |
| 1954 /* Finally, receive each contained stream */ | |
| 1955 do { | |
| 1956 /* | |
| 1957 * we should figure out if it has a recoverable | |
| 1958 * error, in which case do a recv_skip() and drive on. | |
| 1959 * Note, if we fail due to already having this guid, | |
| 1960 * zfs_receive_one() will take care of it (ie, | |
| 1961 * recv_skip() and return 0). | |
| 1962 */ | |
|
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1963 error = zfs_receive_impl(hdl, destname, flags, fd, |
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1964 stream_avl, top_zfs); |
| 5367 | 1965 if (error == ENODATA) { |
| 1966 error = 0; | |
| 1967 break; | |
| 1968 } | |
| 1969 anyerr |= error; | |
| 1970 } while (error == 0); | |
| 1971 | |
| 1972 if (drr->drr_payloadlen != 0 && fromsnap != NULL) { | |
| 1973 /* | |
| 1974 * Now that we have the fs's they sent us, try the | |
| 1975 * renames again. | |
| 1976 */ | |
| 6479 | 1977 softerr = recv_incremental_replication(hdl, tofs, flags, |
| 5367 | 1978 stream_nv, stream_avl); |
| 1979 } | |
| 1980 | |
| 1981 out: | |
| 1982 fsavl_destroy(stream_avl); | |
| 1983 if (stream_nv) | |
| 1984 nvlist_free(stream_nv); | |
| 6479 | 1985 if (softerr) |
| 1986 error = -2; | |
| 5367 | 1987 if (anyerr) |
| 1988 error = -1; | |
| 1989 return (error); | |
| 1990 } | |
| 1991 | |
| 1992 static int | |
| 1993 recv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap) | |
| 1994 { | |
| 1995 dmu_replay_record_t *drr; | |
| 1996 void *buf = malloc(1<<20); | |
|
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1997 char errbuf[1024]; |
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1998 |
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1999 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, |
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2000 "cannot receive:")); |
| 5367 | 2001 |
| 2002 /* XXX would be great to use lseek if possible... */ | |
| 2003 drr = buf; | |
| 2004 | |
| 2005 while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t), | |
| 2006 byteswap, NULL) == 0) { | |
| 2007 if (byteswap) | |
| 2008 drr->drr_type = BSWAP_32(drr->drr_type); | |
| 2009 | |
| 2010 switch (drr->drr_type) { | |
| 2011 case DRR_BEGIN: | |
| 2012 /* NB: not to be used on v2 stream packages */ | |
|
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2013 if (drr->drr_payloadlen != 0) { |
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2014 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
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2015 "invalid substream header")); |
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2016 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); |
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2017 } |
| 5367 | 2018 break; |
| 2019 | |
| 2020 case DRR_END: | |
| 2021 free(buf); | |
| 2022 return (0); | |
| 2023 | |
| 2024 case DRR_OBJECT: | |
| 2025 if (byteswap) { | |
| 2026 drr->drr_u.drr_object.drr_bonuslen = | |
| 2027 BSWAP_32(drr->drr_u.drr_object. | |
| 2028 drr_bonuslen); | |
| 2029 } | |
| 2030 (void) recv_read(hdl, fd, buf, | |
| 2031 P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8), | |
| 2032 B_FALSE, NULL); | |
| 2033 break; | |
| 2034 | |
| 2035 case DRR_WRITE: | |
| 2036 if (byteswap) { | |
| 2037 drr->drr_u.drr_write.drr_length = | |
|
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2038 BSWAP_64(drr->drr_u.drr_write.drr_length); |
| 5367 | 2039 } |
| 2040 (void) recv_read(hdl, fd, buf, | |
| 2041 drr->drr_u.drr_write.drr_length, B_FALSE, NULL); | |
| 2042 break; | |
| 2043 | |
|
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2044 case DRR_WRITE_BYREF: |
| 5367 | 2045 case DRR_FREEOBJECTS: |
| 2046 case DRR_FREE: | |
| 2047 break; | |
| 2048 | |
| 2049 default: | |
|
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2050 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
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2051 "invalid record type")); |
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2052 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); |
| 5367 | 2053 } |
| 2054 } | |
| 2055 | |
| 2056 free(buf); | |
| 2057 return (-1); | |
| 2058 } | |
| 2059 | |
| 2060 /* | |
| 2061 * Restores a backup of tosnap from the file descriptor specified by infd. | |
| 2062 */ | |
| 2063 static int | |
| 2064 zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap, | |
| 2065 recvflags_t flags, dmu_replay_record_t *drr, | |
|
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2066 dmu_replay_record_t *drr_noswap, avl_tree_t *stream_avl, |
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2067 char **top_zfs) |
| 5367 | 2068 { |
| 2069 zfs_cmd_t zc = { 0 }; | |
| 2070 time_t begin_time; | |
| 2071 int ioctl_err, ioctl_errno, err, choplen; | |
| 2072 char *cp; | |
| 2073 struct drr_begin *drrb = &drr->drr_u.drr_begin; | |
| 2074 char errbuf[1024]; | |
| 2075 char chopprefix[ZFS_MAXNAMELEN]; | |
| 2076 boolean_t newfs = B_FALSE; | |
| 2077 boolean_t stream_wantsnewfs; | |
| 2078 uint64_t parent_snapguid = 0; | |
| 2079 prop_changelist_t *clp = NULL; | |
| 7265 | 2080 nvlist_t *snapprops_nvlist = NULL; |
| 5367 | 2081 |
| 2082 begin_time = time(NULL); | |
| 2083 | |
| 2084 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 2085 "cannot receive")); | |
| 2086 | |
| 2087 if (stream_avl != NULL) { | |
| 7265 | 2088 char *snapname; |
| 2089 nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid, | |
| 2090 &snapname); | |
| 5367 | 2091 nvlist_t *props; |
|
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2092 int ret; |
| 5367 | 2093 |
| 2094 (void) nvlist_lookup_uint64(fs, "parentfromsnap", | |
| 2095 &parent_snapguid); | |
| 2096 err = nvlist_lookup_nvlist(fs, "props", &props); | |
| 2097 if (err) | |
| 2098 VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0)); | |
|
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2099 |
| 5367 | 2100 if (flags.canmountoff) { |
| 2101 VERIFY(0 == nvlist_add_uint64(props, | |
| 2102 zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0)); | |
| 2103 } | |
|
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2104 ret = zcmd_write_src_nvlist(hdl, &zc, props); |
| 5367 | 2105 if (err) |
| 2106 nvlist_free(props); | |
|
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2107 |
| 7265 | 2108 if (0 == nvlist_lookup_nvlist(fs, "snapprops", &props)) { |
| 2109 VERIFY(0 == nvlist_lookup_nvlist(props, | |
| 2110 snapname, &snapprops_nvlist)); | |
| 2111 } | |
| 2112 | |
|
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2113 if (ret != 0) |
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2114 return (-1); |
| 5367 | 2115 } |
| 2116 | |
| 2117 /* | |
| 2118 * Determine how much of the snapshot name stored in the stream | |
| 2119 * we are going to tack on to the name they specified on the | |
| 2120 * command line, and how much we are going to chop off. | |
| 2121 * | |
| 2122 * If they specified a snapshot, chop the entire name stored in | |
| 2123 * the stream. | |
| 2124 */ | |
| 2125 (void) strcpy(chopprefix, drrb->drr_toname); | |
| 2126 if (flags.isprefix) { | |
| 2127 /* | |
| 2128 * They specified a fs with -d, we want to tack on | |
| 2129 * everything but the pool name stored in the stream | |
| 2130 */ | |
| 2131 if (strchr(tosnap, '@')) { | |
| 2132 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
| 2133 "argument - snapshot not allowed with -d")); | |
| 2134 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); | |
| 2135 } | |
| 2136 cp = strchr(chopprefix, '/'); | |
| 2137 if (cp == NULL) | |
| 2138 cp = strchr(chopprefix, '@'); | |
| 2139 *cp = '\0'; | |
| 2140 } else if (strchr(tosnap, '@') == NULL) { | |
| 2141 /* | |
| 2142 * If they specified a filesystem without -d, we want to | |
| 2143 * tack on everything after the fs specified in the | |
| 2144 * first name from the stream. | |
| 2145 */ | |
| 2146 cp = strchr(chopprefix, '@'); | |
| 2147 *cp = '\0'; | |
| 2148 } | |
| 2149 choplen = strlen(chopprefix); | |
| 2150 | |
| 2151 /* | |
| 2152 * Determine name of destination snapshot, store in zc_value. | |
| 2153 */ | |
|
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|
2154 (void) strcpy(zc.zc_top_ds, tosnap); |
| 5367 | 2155 (void) strcpy(zc.zc_value, tosnap); |
| 2156 (void) strncat(zc.zc_value, drrb->drr_toname+choplen, | |
| 2157 sizeof (zc.zc_value)); | |
|
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2158 if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT)) { |
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2159 zcmd_free_nvlists(&zc); |
| 5367 | 2160 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); |
|
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2161 } |
| 5367 | 2162 |
| 2163 /* | |
| 2164 * Determine the name of the origin snapshot, store in zc_string. | |
| 2165 */ | |
| 2166 if (drrb->drr_flags & DRR_FLAG_CLONE) { | |
| 2167 if (guid_to_name(hdl, tosnap, | |
| 2168 drrb->drr_fromguid, zc.zc_string) != 0) { | |
|
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2169 zcmd_free_nvlists(&zc); |
| 5367 | 2170 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
| 2171 "local origin for clone %s does not exist"), | |
| 2172 zc.zc_value); | |
| 2173 return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
| 2174 } | |
| 2175 if (flags.verbose) | |
| 2176 (void) printf("found clone origin %s\n", zc.zc_string); | |
| 2177 } | |
| 2178 | |
| 2179 stream_wantsnewfs = (drrb->drr_fromguid == NULL || | |
| 2180 (drrb->drr_flags & DRR_FLAG_CLONE)); | |
| 2181 | |
| 2182 if (stream_wantsnewfs) { | |
| 2183 /* | |
| 2184 * if the parent fs does not exist, look for it based on | |
| 2185 * the parent snap GUID | |
| 2186 */ | |
| 2187 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 2188 "cannot receive new filesystem stream")); | |
| 2189 | |
| 2190 (void) strcpy(zc.zc_name, zc.zc_value); | |
| 2191 cp = strrchr(zc.zc_name, '/'); | |
| 2192 if (cp) | |
| 2193 *cp = '\0'; | |
| 2194 if (cp && | |
| 2195 !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
| 2196 char suffix[ZFS_MAXNAMELEN]; | |
| 2197 (void) strcpy(suffix, strrchr(zc.zc_value, '/')); | |
| 2198 if (guid_to_name(hdl, tosnap, parent_snapguid, | |
| 2199 zc.zc_value) == 0) { | |
| 2200 *strchr(zc.zc_value, '@') = '\0'; | |
| 2201 (void) strcat(zc.zc_value, suffix); | |
| 2202 } | |
| 2203 } | |
| 2204 } else { | |
| 2205 /* | |
| 2206 * if the fs does not exist, look for it based on the | |
| 2207 * fromsnap GUID | |
| 2208 */ | |
| 2209 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 2210 "cannot receive incremental stream")); | |
| 2211 | |
| 2212 (void) strcpy(zc.zc_name, zc.zc_value); | |
| 2213 *strchr(zc.zc_name, '@') = '\0'; | |
| 2214 | |
| 2215 if (!zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
| 2216 char snap[ZFS_MAXNAMELEN]; | |
| 2217 (void) strcpy(snap, strchr(zc.zc_value, '@')); | |
| 2218 if (guid_to_name(hdl, tosnap, drrb->drr_fromguid, | |
| 2219 zc.zc_value) == 0) { | |
| 2220 *strchr(zc.zc_value, '@') = '\0'; | |
| 2221 (void) strcat(zc.zc_value, snap); | |
| 2222 } | |
| 2223 } | |
| 2224 } | |
| 2225 | |
| 2226 (void) strcpy(zc.zc_name, zc.zc_value); | |
| 2227 *strchr(zc.zc_name, '@') = '\0'; | |
| 2228 | |
| 2229 if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
| 2230 zfs_handle_t *zhp; | |
| 2231 /* | |
| 2232 * Destination fs exists. Therefore this should either | |
| 2233 * be an incremental, or the stream specifies a new fs | |
| 2234 * (full stream or clone) and they want us to blow it | |
| 2235 * away (and have therefore specified -F and removed any | |
| 2236 * snapshots). | |
| 2237 */ | |
| 2238 | |
| 2239 if (stream_wantsnewfs) { | |
| 2240 if (!flags.force) { | |
|
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2241 zcmd_free_nvlists(&zc); |
| 5367 | 2242 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
| 2243 "destination '%s' exists\n" | |
| 2244 "must specify -F to overwrite it"), | |
| 2245 zc.zc_name); | |
| 2246 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
| 2247 } | |
| 2248 if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT, | |
| 2249 &zc) == 0) { | |
|
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2250 zcmd_free_nvlists(&zc); |
| 5367 | 2251 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
| 2252 "destination has snapshots (eg. %s)\n" | |
| 2253 "must destroy them to overwrite it"), | |
| 2254 zc.zc_name); | |
| 2255 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
| 2256 } | |
| 2257 } | |
| 2258 | |
|
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2259 if ((zhp = zfs_open(hdl, zc.zc_name, |
|
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2260 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) == NULL) { |
|
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2261 zcmd_free_nvlists(&zc); |
| 5367 | 2262 return (-1); |
|
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|
2263 } |
|
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2264 |
| 5367 | 2265 if (stream_wantsnewfs && |
| 2266 zhp->zfs_dmustats.dds_origin[0]) { | |
|
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|
2267 zcmd_free_nvlists(&zc); |
| 5367 | 2268 zfs_close(zhp); |
| 2269 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 2270 "destination '%s' is a clone\n" | |
| 2271 "must destroy it to overwrite it"), | |
| 2272 zc.zc_name); | |
| 2273 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
| 2274 } | |
| 2275 | |
| 2276 if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM && | |
| 2277 stream_wantsnewfs) { | |
| 2278 /* We can't do online recv in this case */ | |
|
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2279 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0); |
|
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2280 if (clp == NULL) { |
|
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2281 zfs_close(zhp); |
|
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2282 zcmd_free_nvlists(&zc); |
| 5367 | 2283 return (-1); |
|
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2284 } |
| 5367 | 2285 if (changelist_prefix(clp) != 0) { |
| 2286 changelist_free(clp); | |
|
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2287 zfs_close(zhp); |
|
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2288 zcmd_free_nvlists(&zc); |
| 5367 | 2289 return (-1); |
| 2290 } | |
| 2291 } | |
| 2292 zfs_close(zhp); | |
| 2293 } else { | |
| 2294 /* | |
|
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2295 * Destination filesystem does not exist. Therefore we better |
|
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2296 * be creating a new filesystem (either from a full backup, or |
|
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2297 * a clone). It would therefore be invalid if the user |
|
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2298 * specified only the pool name (i.e. if the destination name |
|
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|
2299 * contained no slash character). |
| 5367 | 2300 */ |
|
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2301 if (!stream_wantsnewfs || |
|
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|
2302 (cp = strrchr(zc.zc_name, '/')) == NULL) { |
|
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|
2303 zcmd_free_nvlists(&zc); |
| 5367 | 2304 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
| 2305 "destination '%s' does not exist"), zc.zc_name); | |
| 2306 return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
| 2307 } | |
| 2308 | |
|
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2309 /* |
|
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2310 * Trim off the final dataset component so we perform the |
|
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2311 * recvbackup ioctl to the filesystems's parent. |
|
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|
2312 */ |
|
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|
2313 *cp = '\0'; |
| 5367 | 2314 |
|
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|
2315 if (flags.isprefix && !flags.dryrun && |
|
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2316 create_parents(hdl, zc.zc_value, strlen(tosnap)) != 0) { |
|
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2317 zcmd_free_nvlists(&zc); |
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|
2318 return (zfs_error(hdl, EZFS_BADRESTORE, errbuf)); |
| 5367 | 2319 } |
| 2320 | |
| 2321 newfs = B_TRUE; | |
| 2322 } | |
| 2323 | |
| 2324 zc.zc_begin_record = drr_noswap->drr_u.drr_begin; | |
| 2325 zc.zc_cookie = infd; | |
| 2326 zc.zc_guid = flags.force; | |
| 2327 if (flags.verbose) { | |
| 2328 (void) printf("%s %s stream of %s into %s\n", | |
| 2329 flags.dryrun ? "would receive" : "receiving", | |
| 2330 drrb->drr_fromguid ? "incremental" : "full", | |
| 2331 drrb->drr_toname, zc.zc_value); | |
| 2332 (void) fflush(stdout); | |
| 2333 } | |
| 2334 | |
|
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2335 if (flags.dryrun) { |
|
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|
2336 zcmd_free_nvlists(&zc); |
| 5367 | 2337 return (recv_skip(hdl, infd, flags.byteswap)); |
|
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|
2338 } |
| 5367 | 2339 |
| 2340 err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc); | |
| 2341 ioctl_errno = errno; | |
| 7265 | 2342 zcmd_free_nvlists(&zc); |
| 2343 | |
| 2344 if (err == 0 && snapprops_nvlist) { | |
| 2345 zfs_cmd_t zc2 = { 0 }; | |
| 2346 | |
|
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|
2347 (void) strcpy(zc2.zc_name, zc.zc_value); |
| 7265 | 2348 if (zcmd_write_src_nvlist(hdl, &zc2, snapprops_nvlist) == 0) { |
| 2349 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc2); | |
| 2350 zcmd_free_nvlists(&zc2); | |
| 2351 } | |
| 2352 } | |
| 2353 | |
| 5367 | 2354 if (err && (ioctl_errno == ENOENT || ioctl_errno == ENODEV)) { |
| 2355 /* | |
| 2356 * It may be that this snapshot already exists, | |
| 2357 * in which case we want to consume & ignore it | |
| 2358 * rather than failing. | |
| 2359 */ | |
| 2360 avl_tree_t *local_avl; | |
| 2361 nvlist_t *local_nv, *fs; | |
| 2362 char *cp = strchr(zc.zc_value, '@'); | |
| 2363 | |
| 2364 /* | |
| 2365 * XXX Do this faster by just iterating over snaps in | |
| 2366 * this fs. Also if zc_value does not exist, we will | |
| 2367 * get a strange "does not exist" error message. | |
| 2368 */ | |
| 2369 *cp = '\0'; | |
| 2370 if (gather_nvlist(hdl, zc.zc_value, NULL, NULL, | |
| 2371 &local_nv, &local_avl) == 0) { | |
| 2372 *cp = '@'; | |
| 2373 fs = fsavl_find(local_avl, drrb->drr_toguid, NULL); | |
| 2374 fsavl_destroy(local_avl); | |
| 2375 nvlist_free(local_nv); | |
| 2376 | |
| 2377 if (fs != NULL) { | |
| 2378 if (flags.verbose) { | |
| 2379 (void) printf("snap %s already exists; " | |
| 2380 "ignoring\n", zc.zc_value); | |
| 2381 } | |
| 2382 ioctl_err = recv_skip(hdl, infd, | |
| 2383 flags.byteswap); | |
| 2384 } | |
| 2385 } | |
| 2386 *cp = '@'; | |
| 2387 } | |
| 2388 | |
|
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|
2389 |
| 5367 | 2390 if (ioctl_err != 0) { |
| 2391 switch (ioctl_errno) { | |
| 2392 case ENODEV: | |
| 2393 cp = strchr(zc.zc_value, '@'); | |
| 2394 *cp = '\0'; | |
| 2395 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 2396 "most recent snapshot of %s does not\n" | |
| 2397 "match incremental source"), zc.zc_value); | |
| 2398 (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
| 2399 *cp = '@'; | |
| 2400 break; | |
| 2401 case ETXTBSY: | |
| 2402 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 2403 "destination %s has been modified\n" | |
| 2404 "since most recent snapshot"), zc.zc_name); | |
| 2405 (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
| 2406 break; | |
| 2407 case EEXIST: | |
| 2408 cp = strchr(zc.zc_value, '@'); | |
| 2409 if (newfs) { | |
| 2410 /* it's the containing fs that exists */ | |
| 2411 *cp = '\0'; | |
| 2412 } | |
| 2413 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 2414 "destination already exists")); | |
| 2415 (void) zfs_error_fmt(hdl, EZFS_EXISTS, | |
| 2416 dgettext(TEXT_DOMAIN, "cannot restore to %s"), | |
| 2417 zc.zc_value); | |
| 2418 *cp = '@'; | |
| 2419 break; | |
| 2420 case EINVAL: | |
| 2421 (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
| 2422 break; | |
| 2423 case ECKSUM: | |
| 2424 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
| 2425 "invalid stream (checksum mismatch)")); | |
| 2426 (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
| 2427 break; | |
| 2428 default: | |
| 2429 (void) zfs_standard_error(hdl, ioctl_errno, errbuf); | |
| 2430 } | |
| 2431 } | |
| 2432 | |
| 2433 /* | |
|
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2434 * Mount the target filesystem (if created). Also mount any |
|
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2435 * children of the target filesystem if we did a replication |
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2436 * receive (indicated by stream_avl being non-NULL). |
| 5367 | 2437 */ |
| 2438 cp = strchr(zc.zc_value, '@'); | |
| 2439 if (cp && (ioctl_err == 0 || !newfs)) { | |
| 2440 zfs_handle_t *h; | |
| 2441 | |
| 2442 *cp = '\0'; | |
| 2443 h = zfs_open(hdl, zc.zc_value, | |
| 2444 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); | |
| 6476 | 2445 if (h != NULL) { |
| 5367 | 2446 if (h->zfs_type == ZFS_TYPE_VOLUME) { |
|
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2447 *cp = '@'; |
|
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2448 } else if (newfs || stream_avl) { |
|
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2449 /* |
|
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2450 * Track the first/top of hierarchy fs, |
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2451 * for mounting and sharing later. |
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2452 */ |
|
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2453 if (top_zfs && *top_zfs == NULL) |
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2454 *top_zfs = zfs_strdup(hdl, zc.zc_value); |
| 5367 | 2455 } |
| 6476 | 2456 zfs_close(h); |
| 5367 | 2457 } |
|
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|
2458 *cp = '@'; |
| 5367 | 2459 } |
| 2460 | |
| 2461 if (clp) { | |
| 2462 err |= changelist_postfix(clp); | |
| 2463 changelist_free(clp); | |
| 2464 } | |
| 2465 | |
| 2466 if (err || ioctl_err) | |
| 2467 return (-1); | |
| 2468 | |
| 2469 if (flags.verbose) { | |
| 2470 char buf1[64]; | |
| 2471 char buf2[64]; | |
| 2472 uint64_t bytes = zc.zc_cookie; | |
| 2473 time_t delta = time(NULL) - begin_time; | |
| 2474 if (delta == 0) | |
| 2475 delta = 1; | |
| 2476 zfs_nicenum(bytes, buf1, sizeof (buf1)); | |
| 2477 zfs_nicenum(bytes/delta, buf2, sizeof (buf1)); | |
| 2478 | |
| 2479 (void) printf("received %sB stream in %lu seconds (%sB/sec)\n", | |
| 2480 buf1, delta, buf2); | |
| 2481 } | |
| 2482 | |
| 2483 return (0); | |
| 2484 } | |
| 2485 | |
|
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|
2486 static int |
|
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|
2487 zfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags, |
|
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|
2488 int infd, avl_tree_t *stream_avl, char **top_zfs) |
| 5367 | 2489 { |
| 2490 int err; | |
| 2491 dmu_replay_record_t drr, drr_noswap; | |
| 2492 struct drr_begin *drrb = &drr.drr_u.drr_begin; | |
| 2493 char errbuf[1024]; | |
| 2494 zio_cksum_t zcksum = { 0 }; | |
|
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2495 uint64_t featureflags; |
|
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|
2496 int hdrtype; |
| 5367 | 2497 |
| 2498 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
| 2499 "cannot receive")); | |
| 2500 | |
| 2501 if (flags.isprefix && | |
| 2502 !zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) { | |
| 2503 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs " | |
| 2504 "(%s) does not exist"), tosnap); | |
| 2505 return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
| 2506 } | |
| 2507 | |
| 2508 /* read in the BEGIN record */ | |
| 2509 if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE, | |
| 2510 &zcksum))) | |
| 2511 return (err); | |
| 2512 | |
| 2513 if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) { | |
| 2514 /* It's the double end record at the end of a package */ | |
| 2515 return (ENODATA); | |
| 2516 } | |
| 2517 | |
| 2518 /* the kernel needs the non-byteswapped begin record */ | |
| 2519 drr_noswap = drr; | |
| 2520 | |
| 5446 | 2521 flags.byteswap = B_FALSE; |
| 5367 | 2522 if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { |
| 2523 /* | |
| 2524 * We computed the checksum in the wrong byteorder in | |
| 2525 * recv_read() above; do it again correctly. | |
| 2526 */ | |
| 2527 bzero(&zcksum, sizeof (zio_cksum_t)); | |
| 2528 fletcher_4_incremental_byteswap(&drr, sizeof (drr), &zcksum); | |
| 2529 flags.byteswap = B_TRUE; | |
| 2530 | |
| 2531 drr.drr_type = BSWAP_32(drr.drr_type); | |
| 2532 drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen); | |
| 2533 drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
|
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|
2534 drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); |
| 5367 | 2535 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); |
| 2536 drrb->drr_type = BSWAP_32(drrb->drr_type); | |
| 2537 drrb->drr_flags = BSWAP_32(drrb->drr_flags); | |
| 2538 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
| 2539 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
| 2540 } | |
| 2541 | |
| 2542 if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) { | |
| 2543 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
| 2544 "stream (bad magic number)")); | |
| 2545 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
| 2546 } | |
| 2547 | |
|
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2548 featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
|
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2549 hdrtype = DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo); |
|
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2550 |
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2551 if (!DMU_STREAM_SUPPORTED(featureflags) || |
|
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2552 (hdrtype != DMU_SUBSTREAM && hdrtype != DMU_COMPOUNDSTREAM)) { |
|
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2553 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
|
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2554 "stream has unsupported feature, feature flags = %lx"), |
|
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2555 featureflags); |
|
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2556 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); |
|
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2557 } |
|
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2558 |
| 5367 | 2559 if (strchr(drrb->drr_toname, '@') == NULL) { |
| 2560 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
| 2561 "stream (bad snapshot name)")); | |
| 2562 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
| 2563 } | |
| 2564 | |
|
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2565 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == DMU_SUBSTREAM) { |
| 5367 | 2566 return (zfs_receive_one(hdl, infd, tosnap, flags, |
|
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2567 &drr, &drr_noswap, stream_avl, top_zfs)); |
|
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2568 } else { /* must be DMU_COMPOUNDSTREAM */ |
|
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|
2569 assert(DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == |
|
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|
2570 DMU_COMPOUNDSTREAM); |
| 5367 | 2571 return (zfs_receive_package(hdl, infd, tosnap, flags, |
|
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2572 &drr, &zcksum, top_zfs)); |
| 5367 | 2573 } |
| 2574 } | |
|
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2575 |
|
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2576 /* |
|
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2577 * Restores a backup of tosnap from the file descriptor specified by infd. |
|
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2578 * Return 0 on total success, -2 if some things couldn't be |
|
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2579 * destroyed/renamed/promoted, -1 if some things couldn't be received. |
|
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2580 * (-1 will override -2). |
|
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2581 */ |
|
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2582 int |
|
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2583 zfs_receive(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags, |
|
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2584 int infd, avl_tree_t *stream_avl) |
|
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2585 { |
|
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2586 char *top_zfs = NULL; |
|
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2587 int err; |
|
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2588 |
|
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2589 err = zfs_receive_impl(hdl, tosnap, flags, infd, stream_avl, &top_zfs); |
|
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2590 |
|
8584
327a1b6dd944
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2591 if (err == 0 && !flags.nomount && top_zfs) { |
|
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2592 zfs_handle_t *zhp; |
|
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2593 prop_changelist_t *clp; |
|
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2594 |
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2595 zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM); |
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2596 if (zhp != NULL) { |
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2597 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, |
|
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2598 CL_GATHER_MOUNT_ALWAYS, 0); |
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2599 zfs_close(zhp); |
|
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2600 if (clp != NULL) { |
|
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2601 /* mount and share received datasets */ |
|
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2602 err = changelist_postfix(clp); |
|
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2603 changelist_free(clp); |
|
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2604 } |
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2605 } |
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2606 if (zhp == NULL || clp == NULL || err) |
|
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2607 err = -1; |
|
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2608 } |
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2609 if (top_zfs) |
|
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2610 free(top_zfs); |
|
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2611 |
|
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2612 return (err); |
|
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2613 } |