Changeset 146
- Timestamp:
- 06/12/06 18:00:40 (3 years ago)
- Files:
-
- trunk/client/revimage/lvm.c (modified) (3 diffs)
Legend:
- Unmodified
- Added
- Removed
- Modified
- Copied
- Moved
trunk/client/revimage/lvm.c
r141 r146 31 31 extern unsigned long lvm_sect; 32 32 33 /* check if it's and LVM partition */ 33 /* compare two UUID strings 34 * 35 * return 1 if equal, else return 0 36 * '-' characters are ignored in s2 37 */ 38 int uuid_compare(char *s1, char *s2) 39 { 40 int i; 41 42 for (i = 0; i < 32; i++) { 43 if (*s2 == '-') 44 s2++; 45 if (*s1++ != *s2++) 46 return 0; 47 } 48 return 1; 49 } 50 51 52 /* check if it's a LVM partition */ 34 53 void lvm_check(char *device, long long *offset) 35 54 { … … 43 62 exit(1); 44 63 } 45 fread(&buf[0], 256 *4, 1, fi);64 fread(&buf[0], 256 * 4, 1, fi); 46 65 47 66 *offset = 0; 48 67 /* lvm1 checks */ 49 debug("LVM1 signature check: %08lx\n", buf[0]); 50 if (buf[0] == 0x00014d48) 51 { 68 debug("LVM1 signature check: %08lx\n", buf[0]); 69 if (buf[0] == 0x00014d48) { 52 70 debug("LVM1 found\n"); 53 71 54 72 *offset = buf[9] + buf[10]; 55 73 debug("LVM: Real part offset: %16llx\n", *offset); 56 57 debug("LVM: VG name : '%32s'\n", (char *) &buf[11+32]);58 debug("LVM: PV Num : %ld\n", buf[108]); 59 debug("LVM: PE Size : %ld\n", buf[113] /2);74 75 debug("LVM: VG name : '%32s'\n", (char *) &buf[11 + 32]); 76 debug("LVM: PV Num : %ld\n", buf[108]); 77 debug("LVM: PE Size : %ld\n", buf[113] / 2); 60 78 debug("LVM: PE Total: %ld\n", buf[114]); 61 79 debug("LVM: PE Alloc: %ld\n", buf[115]); 62 63 lvm_sect = buf[113] *buf[115];80 81 lvm_sect = buf[113] * buf[115]; 64 82 debug("LVM: Total sectors: %ld\n", lvm_sect); 65 83 66 84 67 85 if (fseek(fi, buf[9], SEEK_SET) != 0) { 68 debug("Seek error\n");69 return;86 debug("Seek error\n"); 87 return; 70 88 } 71 } 72 else 73 { 74 __u64 off; 75 int state = 0, pe_count = 0, extent = 0; 89 } else { 90 __u64 off, mdh_offset; 91 int state = 0, pe_count = 0, extent = 0, lev = 0; 76 92 __u64 *pv; 93 char *pvuuid; 77 94 78 95 /* lvm2 */ 79 96 /* buf[128] = label_header */ 80 if (buf[128] != 0x4542414C || buf[129] != 0x454E4F4C) 81 { 97 if (buf[128] != 0x4542414C || buf[129] != 0x454E4F4C) { 82 98 debug("LVM2 LABELONE not found\n"); 83 99 return; 84 100 } 85 101 debug("LVM2 LABELONE found\n"); 86 if (buf[134] != 0x324D564C || buf[135] != 0x31303020) 87 { 102 if (buf[134] != 0x324D564C || buf[135] != 0x31303020) { 88 103 debug("LVM2 001 not found\n"); 89 104 return; 90 105 } 91 106 /* buf[133] = label_header.offset_xl */ 92 107 /* pv_header */ 93 pv = (__u64 *)(((__u8 *)&buf[128]) + buf[133]); 94 debug("LVM2 pv UUID: %32s\n", (char *)pv); 108 pv = (__u64 *) (((__u8 *) & buf[128]) + buf[133]); 109 /* copy this PV uuid */ 110 pvuuid = pv; 111 debug("LVM2 pv UUID: %32s\n", (char *) pvuuid); 95 112 /* skip data */ 96 113 pv += 5; … … 99 116 } 100 117 pv += 2; 101 debug("LVM2: Mdh offset: 0x%llX\n", *pv);102 fseek(fi, *pv, SEEK_SET);103 f read(buf, 128*4, 1, fi);104 if (strncmp((char *)&buf[1], (char *)FMTT_MAGIC, 16))105 118 mdh_offset = *pv; 119 debug("LVM2: Mdh offset: 0x%llX\n", mdh_offset); 120 fseek(fi, mdh_offset, SEEK_SET); 121 fread(buf, 128 * 4, 1, fi); 122 if (strncmp((char *) &buf[1], (char *) FMTT_MAGIC, 16)) { 106 123 debug("LVM: FMTT_MAGIC not found\n"); 107 124 return; 108 125 } 109 126 debug("LVM2: FMTT v%ld\n", buf[5]); 110 off = buf[10] + ((__u64) buf[11] << 32);127 off = buf[10] + ((__u64) buf[11] << 32); 111 128 debug("LVM2: Meta offset: 0x%llX\n", off); 112 if (off == 0) return; 113 off += 0x800; 129 if (off == 0) 130 return; 131 off += mdh_offset; 114 132 fseek(fi, off, SEEK_SET); 115 133 *offset = 0; 116 while (1) 117 { 118 char b[128]; 134 /* Q&D parsing of meta data */ 135 state = 0; 136 while (1) { 137 char b[128], uuid[40]; 119 138 120 fgets(b, 127 ,fi); 121 debug("LVM2: %s", b); 139 fgets(b, 127, fi); 140 debug("LVM2:%d %s", lev, b); 141 if (strstr(b, "{")) 142 lev++; 143 if (strstr(b, "}")) 144 lev--; 122 145 switch (state) { 123 146 case 0: 124 sscanf(b, "extent_size = %d", &extent); 125 if (strstr(b, "physical_volumes")) state = 1; 126 break; 147 sscanf(b, "extent_size = %d", &extent); 148 if (strstr(b, "physical_volumes")) 149 state = 1; 150 break; 127 151 case 1: 128 if (sscanf(b, "pe_start = %lld", offset) == 1) state = -1; 129 break; 152 if (sscanf(b, "id = \"%38s", uuid) == 1) { 153 if (uuid_compare(pvuuid, uuid)) 154 state = 2; 155 } 156 break; 157 case 2: 158 if (sscanf(b, "pe_start = %lld", offset) == 1) 159 state = -1; 160 break; 161 case -1: 162 sscanf(b, "pe_count = %d", &pe_count); 163 break; 130 164 } 131 sscanf(b, "pe_count = %d", &pe_count); 132 if (strstr(b, "}")) break; 133 } 134 if (state != -1) 135 { 165 if (strstr(b, "}") && lev == 2 && state == -1) 166 break; 167 } 168 if (state != -1) { 136 169 debug("LVM2 pe_start not found!\n"); 137 170 *offset = 0; 138 171 return; 139 172 } 140 173 debug("LVM: Saving %lld sectors\n", *offset); 141 174 *offset *= 512; 142 175 lvm_sect = extent * pe_count; 143 144 176 } 177 145 178 146 179 fclose(fi);
