1 /* 2 * zcore module to export memory content and register sets for creating system 3 * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same 4 * dump format as s390 standalone dumps. 5 * 6 * For more information please refer to Documentation/s390/zfcpdump.txt 7 * 8 * Copyright IBM Corp. 2003, 2008 9 * Author(s): Michael Holzheu 10 */ 11 12 #define KMSG_COMPONENT "zdump" 13 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 14 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/miscdevice.h> 18 #include <linux/debugfs.h> 19 #include <linux/module.h> 20 #include <asm/asm-offsets.h> 21 #include <asm/ipl.h> 22 #include <asm/sclp.h> 23 #include <asm/setup.h> 24 #include <asm/uaccess.h> 25 #include <asm/debug.h> 26 #include <asm/processor.h> 27 #include <asm/irqflags.h> 28 #include <asm/checksum.h> 29 #include "sclp.h" 30 31 #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) 32 33 #define TO_USER 0 34 #define TO_KERNEL 1 35 #define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */ 36 37 enum arch_id { 38 ARCH_S390 = 0, 39 ARCH_S390X = 1, 40 }; 41 42 /* dump system info */ 43 44 struct sys_info { 45 enum arch_id arch; 46 unsigned long sa_base; 47 u32 sa_size; 48 int cpu_map[NR_CPUS]; 49 unsigned long mem_size; 50 struct save_area lc_mask; 51 }; 52 53 struct ipib_info { 54 unsigned long ipib; 55 u32 checksum; 56 } __attribute__((packed)); 57 58 static struct sys_info sys_info; 59 static struct debug_info *zcore_dbf; 60 static int hsa_available; 61 static struct dentry *zcore_dir; 62 static struct dentry *zcore_file; 63 static struct dentry *zcore_memmap_file; 64 static struct dentry *zcore_reipl_file; 65 static struct ipl_parameter_block *ipl_block; 66 67 /* 68 * Copy memory from HSA to kernel or user memory (not reentrant): 69 * 70 * @dest: Kernel or user buffer where memory should be copied to 71 * @src: Start address within HSA where data should be copied 72 * @count: Size of buffer, which should be copied 73 * @mode: Either TO_KERNEL or TO_USER 74 */ 75 static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode) 76 { 77 int offs, blk_num; 78 static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); 79 80 if (count == 0) 81 return 0; 82 83 /* copy first block */ 84 offs = 0; 85 if ((src % PAGE_SIZE) != 0) { 86 blk_num = src / PAGE_SIZE + 2; 87 if (sclp_sdias_copy(buf, blk_num, 1)) { 88 TRACE("sclp_sdias_copy() failed\n"); 89 return -EIO; 90 } 91 offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count); 92 if (mode == TO_USER) { 93 if (copy_to_user((__force __user void*) dest, 94 buf + (src % PAGE_SIZE), offs)) 95 return -EFAULT; 96 } else 97 memcpy(dest, buf + (src % PAGE_SIZE), offs); 98 } 99 if (offs == count) 100 goto out; 101 102 /* copy middle */ 103 for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) { 104 blk_num = (src + offs) / PAGE_SIZE + 2; 105 if (sclp_sdias_copy(buf, blk_num, 1)) { 106 TRACE("sclp_sdias_copy() failed\n"); 107 return -EIO; 108 } 109 if (mode == TO_USER) { 110 if (copy_to_user((__force __user void*) dest + offs, 111 buf, PAGE_SIZE)) 112 return -EFAULT; 113 } else 114 memcpy(dest + offs, buf, PAGE_SIZE); 115 } 116 if (offs == count) 117 goto out; 118 119 /* copy last block */ 120 blk_num = (src + offs) / PAGE_SIZE + 2; 121 if (sclp_sdias_copy(buf, blk_num, 1)) { 122 TRACE("sclp_sdias_copy() failed\n"); 123 return -EIO; 124 } 125 if (mode == TO_USER) { 126 if (copy_to_user((__force __user void*) dest + offs, buf, 127 PAGE_SIZE)) 128 return -EFAULT; 129 } else 130 memcpy(dest + offs, buf, count - offs); 131 out: 132 return 0; 133 } 134 135 static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count) 136 { 137 return memcpy_hsa((void __force *) dest, src, count, TO_USER); 138 } 139 140 static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count) 141 { 142 return memcpy_hsa(dest, src, count, TO_KERNEL); 143 } 144 145 static int __init init_cpu_info(enum arch_id arch) 146 { 147 struct save_area *sa; 148 149 /* get info for boot cpu from lowcore, stored in the HSA */ 150 151 sa = kmalloc(sizeof(*sa), GFP_KERNEL); 152 if (!sa) 153 return -ENOMEM; 154 if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) { 155 TRACE("could not copy from HSA\n"); 156 kfree(sa); 157 return -EIO; 158 } 159 zfcpdump_save_areas[0] = sa; 160 return 0; 161 } 162 163 static DEFINE_MUTEX(zcore_mutex); 164 165 #define DUMP_VERSION 0x5 166 #define DUMP_MAGIC 0xa8190173618f23fdULL 167 #define DUMP_ARCH_S390X 2 168 #define DUMP_ARCH_S390 1 169 #define HEADER_SIZE 4096 170 171 /* dump header dumped according to s390 crash dump format */ 172 173 struct zcore_header { 174 u64 magic; 175 u32 version; 176 u32 header_size; 177 u32 dump_level; 178 u32 page_size; 179 u64 mem_size; 180 u64 mem_start; 181 u64 mem_end; 182 u32 num_pages; 183 u32 pad1; 184 u64 tod; 185 struct cpuid cpu_id; 186 u32 arch_id; 187 u32 volnr; 188 u32 build_arch; 189 u64 rmem_size; 190 u8 mvdump; 191 u16 cpu_cnt; 192 u16 real_cpu_cnt; 193 u8 end_pad1[0x200-0x061]; 194 u64 mvdump_sign; 195 u64 mvdump_zipl_time; 196 u8 end_pad2[0x800-0x210]; 197 u32 lc_vec[512]; 198 } __attribute__((packed,__aligned__(16))); 199 200 static struct zcore_header zcore_header = { 201 .magic = DUMP_MAGIC, 202 .version = DUMP_VERSION, 203 .header_size = 4096, 204 .dump_level = 0, 205 .page_size = PAGE_SIZE, 206 .mem_start = 0, 207 #ifdef CONFIG_64BIT 208 .build_arch = DUMP_ARCH_S390X, 209 #else 210 .build_arch = DUMP_ARCH_S390, 211 #endif 212 }; 213 214 /* 215 * Copy lowcore info to buffer. Use map in order to copy only register parts. 216 * 217 * @buf: User buffer 218 * @sa: Pointer to save area 219 * @sa_off: Offset in save area to copy 220 * @len: Number of bytes to copy 221 */ 222 static int copy_lc(void __user *buf, void *sa, int sa_off, int len) 223 { 224 int i; 225 char *lc_mask = (char*)&sys_info.lc_mask; 226 227 for (i = 0; i < len; i++) { 228 if (!lc_mask[i + sa_off]) 229 continue; 230 if (copy_to_user(buf + i, sa + sa_off + i, 1)) 231 return -EFAULT; 232 } 233 return 0; 234 } 235 236 /* 237 * Copy lowcores info to memory, if necessary 238 * 239 * @buf: User buffer 240 * @addr: Start address of buffer in dump memory 241 * @count: Size of buffer 242 */ 243 static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) 244 { 245 unsigned long end; 246 int i = 0; 247 248 if (count == 0) 249 return 0; 250 251 end = start + count; 252 while (zfcpdump_save_areas[i]) { 253 unsigned long cp_start, cp_end; /* copy range */ 254 unsigned long sa_start, sa_end; /* save area range */ 255 unsigned long prefix; 256 unsigned long sa_off, len, buf_off; 257 258 prefix = zfcpdump_save_areas[i]->pref_reg; 259 sa_start = prefix + sys_info.sa_base; 260 sa_end = prefix + sys_info.sa_base + sys_info.sa_size; 261 262 if ((end < sa_start) || (start > sa_end)) 263 goto next; 264 cp_start = max(start, sa_start); 265 cp_end = min(end, sa_end); 266 267 buf_off = cp_start - start; 268 sa_off = cp_start - sa_start; 269 len = cp_end - cp_start; 270 271 TRACE("copy_lc for: %lx\n", start); 272 if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len)) 273 return -EFAULT; 274 next: 275 i++; 276 } 277 return 0; 278 } 279 280 /* 281 * Read routine for zcore character device 282 * First 4K are dump header 283 * Next 32MB are HSA Memory 284 * Rest is read from absolute Memory 285 */ 286 static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, 287 loff_t *ppos) 288 { 289 unsigned long mem_start; /* Start address in memory */ 290 size_t mem_offs; /* Offset in dump memory */ 291 size_t hdr_count; /* Size of header part of output buffer */ 292 size_t size; 293 int rc; 294 295 mutex_lock(&zcore_mutex); 296 297 if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { 298 rc = -EINVAL; 299 goto fail; 300 } 301 302 count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); 303 304 /* Copy dump header */ 305 if (*ppos < HEADER_SIZE) { 306 size = min(count, (size_t) (HEADER_SIZE - *ppos)); 307 if (copy_to_user(buf, &zcore_header + *ppos, size)) { 308 rc = -EFAULT; 309 goto fail; 310 } 311 hdr_count = size; 312 mem_start = 0; 313 } else { 314 hdr_count = 0; 315 mem_start = *ppos - HEADER_SIZE; 316 } 317 318 mem_offs = 0; 319 320 /* Copy from HSA data */ 321 if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) { 322 size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE 323 - mem_start)); 324 rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); 325 if (rc) 326 goto fail; 327 328 mem_offs += size; 329 } 330 331 /* Copy from real mem */ 332 size = count - mem_offs - hdr_count; 333 rc = copy_to_user_real(buf + hdr_count + mem_offs, 334 (void *) mem_start + mem_offs, size); 335 if (rc) 336 goto fail; 337 338 /* 339 * Since s390 dump analysis tools like lcrash or crash 340 * expect register sets in the prefix pages of the cpus, 341 * we copy them into the read buffer, if necessary. 342 * buf + hdr_count: Start of memory part of output buffer 343 * mem_start: Start memory address to copy from 344 * count - hdr_count: Size of memory area to copy 345 */ 346 if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { 347 rc = -EFAULT; 348 goto fail; 349 } 350 *ppos += count; 351 fail: 352 mutex_unlock(&zcore_mutex); 353 return (rc < 0) ? rc : count; 354 } 355 356 static int zcore_open(struct inode *inode, struct file *filp) 357 { 358 if (!hsa_available) 359 return -ENODATA; 360 else 361 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; 362 } 363 364 static int zcore_release(struct inode *inode, struct file *filep) 365 { 366 diag308(DIAG308_REL_HSA, NULL); 367 hsa_available = 0; 368 return 0; 369 } 370 371 static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) 372 { 373 loff_t rc; 374 375 mutex_lock(&zcore_mutex); 376 switch (orig) { 377 case 0: 378 file->f_pos = offset; 379 rc = file->f_pos; 380 break; 381 case 1: 382 file->f_pos += offset; 383 rc = file->f_pos; 384 break; 385 default: 386 rc = -EINVAL; 387 } 388 mutex_unlock(&zcore_mutex); 389 return rc; 390 } 391 392 static const struct file_operations zcore_fops = { 393 .owner = THIS_MODULE, 394 .llseek = zcore_lseek, 395 .read = zcore_read, 396 .open = zcore_open, 397 .release = zcore_release, 398 }; 399 400 static ssize_t zcore_memmap_read(struct file *filp, char __user *buf, 401 size_t count, loff_t *ppos) 402 { 403 return simple_read_from_buffer(buf, count, ppos, filp->private_data, 404 MEMORY_CHUNKS * CHUNK_INFO_SIZE); 405 } 406 407 static int zcore_memmap_open(struct inode *inode, struct file *filp) 408 { 409 int i; 410 char *buf; 411 struct mem_chunk *chunk_array; 412 413 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 414 GFP_KERNEL); 415 if (!chunk_array) 416 return -ENOMEM; 417 detect_memory_layout(chunk_array); 418 buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL); 419 if (!buf) { 420 kfree(chunk_array); 421 return -ENOMEM; 422 } 423 for (i = 0; i < MEMORY_CHUNKS; i++) { 424 sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ", 425 (unsigned long long) chunk_array[i].addr, 426 (unsigned long long) chunk_array[i].size); 427 if (chunk_array[i].size == 0) 428 break; 429 } 430 kfree(chunk_array); 431 filp->private_data = buf; 432 return nonseekable_open(inode, filp); 433 } 434 435 static int zcore_memmap_release(struct inode *inode, struct file *filp) 436 { 437 kfree(filp->private_data); 438 return 0; 439 } 440 441 static const struct file_operations zcore_memmap_fops = { 442 .owner = THIS_MODULE, 443 .read = zcore_memmap_read, 444 .open = zcore_memmap_open, 445 .release = zcore_memmap_release, 446 .llseek = no_llseek, 447 }; 448 449 static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf, 450 size_t count, loff_t *ppos) 451 { 452 if (ipl_block) { 453 diag308(DIAG308_SET, ipl_block); 454 diag308(DIAG308_IPL, NULL); 455 } 456 return count; 457 } 458 459 static int zcore_reipl_open(struct inode *inode, struct file *filp) 460 { 461 return nonseekable_open(inode, filp); 462 } 463 464 static int zcore_reipl_release(struct inode *inode, struct file *filp) 465 { 466 return 0; 467 } 468 469 static const struct file_operations zcore_reipl_fops = { 470 .owner = THIS_MODULE, 471 .write = zcore_reipl_write, 472 .open = zcore_reipl_open, 473 .release = zcore_reipl_release, 474 .llseek = no_llseek, 475 }; 476 477 #ifdef CONFIG_32BIT 478 479 static void __init set_lc_mask(struct save_area *map) 480 { 481 memset(&map->ext_save, 0xff, sizeof(map->ext_save)); 482 memset(&map->timer, 0xff, sizeof(map->timer)); 483 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); 484 memset(&map->psw, 0xff, sizeof(map->psw)); 485 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); 486 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); 487 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); 488 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); 489 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); 490 } 491 492 #else /* CONFIG_32BIT */ 493 494 static void __init set_lc_mask(struct save_area *map) 495 { 496 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); 497 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); 498 memset(&map->psw, 0xff, sizeof(map->psw)); 499 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); 500 memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg)); 501 memset(&map->tod_reg, 0xff, sizeof(map->tod_reg)); 502 memset(&map->timer, 0xff, sizeof(map->timer)); 503 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); 504 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); 505 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); 506 } 507 508 #endif /* CONFIG_32BIT */ 509 510 /* 511 * Initialize dump globals for a given architecture 512 */ 513 static int __init sys_info_init(enum arch_id arch) 514 { 515 int rc; 516 517 switch (arch) { 518 case ARCH_S390X: 519 pr_alert("DETECTED 'S390X (64 bit) OS'\n"); 520 break; 521 case ARCH_S390: 522 pr_alert("DETECTED 'S390 (32 bit) OS'\n"); 523 break; 524 default: 525 pr_alert("0x%x is an unknown architecture.\n",arch); 526 return -EINVAL; 527 } 528 sys_info.sa_base = SAVE_AREA_BASE; 529 sys_info.sa_size = sizeof(struct save_area); 530 sys_info.arch = arch; 531 set_lc_mask(&sys_info.lc_mask); 532 rc = init_cpu_info(arch); 533 if (rc) 534 return rc; 535 sys_info.mem_size = real_memory_size; 536 537 return 0; 538 } 539 540 static int __init check_sdias(void) 541 { 542 int rc, act_hsa_size; 543 544 rc = sclp_sdias_blk_count(); 545 if (rc < 0) { 546 TRACE("Could not determine HSA size\n"); 547 return rc; 548 } 549 act_hsa_size = (rc - 1) * PAGE_SIZE; 550 if (act_hsa_size < ZFCPDUMP_HSA_SIZE) { 551 TRACE("HSA size too small: %i\n", act_hsa_size); 552 return -EINVAL; 553 } 554 return 0; 555 } 556 557 static int __init get_mem_size(unsigned long *mem) 558 { 559 int i; 560 struct mem_chunk *chunk_array; 561 562 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 563 GFP_KERNEL); 564 if (!chunk_array) 565 return -ENOMEM; 566 detect_memory_layout(chunk_array); 567 for (i = 0; i < MEMORY_CHUNKS; i++) { 568 if (chunk_array[i].size == 0) 569 break; 570 *mem += chunk_array[i].size; 571 } 572 kfree(chunk_array); 573 return 0; 574 } 575 576 static int __init zcore_header_init(int arch, struct zcore_header *hdr) 577 { 578 int rc, i; 579 unsigned long memory = 0; 580 u32 prefix; 581 582 if (arch == ARCH_S390X) 583 hdr->arch_id = DUMP_ARCH_S390X; 584 else 585 hdr->arch_id = DUMP_ARCH_S390; 586 rc = get_mem_size(&memory); 587 if (rc) 588 return rc; 589 hdr->mem_size = memory; 590 hdr->rmem_size = memory; 591 hdr->mem_end = sys_info.mem_size; 592 hdr->num_pages = memory / PAGE_SIZE; 593 hdr->tod = get_clock(); 594 get_cpu_id(&hdr->cpu_id); 595 for (i = 0; zfcpdump_save_areas[i]; i++) { 596 prefix = zfcpdump_save_areas[i]->pref_reg; 597 hdr->real_cpu_cnt++; 598 if (!prefix) 599 continue; 600 hdr->lc_vec[hdr->cpu_cnt] = prefix; 601 hdr->cpu_cnt++; 602 } 603 return 0; 604 } 605 606 /* 607 * Provide IPL parameter information block from either HSA or memory 608 * for future reipl 609 */ 610 static int __init zcore_reipl_init(void) 611 { 612 struct ipib_info ipib_info; 613 int rc; 614 615 rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info)); 616 if (rc) 617 return rc; 618 if (ipib_info.ipib == 0) 619 return 0; 620 ipl_block = (void *) __get_free_page(GFP_KERNEL); 621 if (!ipl_block) 622 return -ENOMEM; 623 if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE) 624 rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE); 625 else 626 rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE); 627 if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) != 628 ipib_info.checksum) { 629 TRACE("Checksum does not match\n"); 630 free_page((unsigned long) ipl_block); 631 ipl_block = NULL; 632 } 633 return 0; 634 } 635 636 static int __init zcore_init(void) 637 { 638 unsigned char arch; 639 int rc; 640 641 if (ipl_info.type != IPL_TYPE_FCP_DUMP) 642 return -ENODATA; 643 if (OLDMEM_BASE) 644 return -ENODATA; 645 646 zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long)); 647 debug_register_view(zcore_dbf, &debug_sprintf_view); 648 debug_set_level(zcore_dbf, 6); 649 650 TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno); 651 TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn); 652 TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun); 653 654 rc = sclp_sdias_init(); 655 if (rc) 656 goto fail; 657 658 rc = check_sdias(); 659 if (rc) 660 goto fail; 661 662 rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); 663 if (rc) 664 goto fail; 665 666 #ifdef CONFIG_64BIT 667 if (arch == ARCH_S390) { 668 pr_alert("The 64-bit dump tool cannot be used for a " 669 "32-bit system\n"); 670 rc = -EINVAL; 671 goto fail; 672 } 673 #else /* CONFIG_64BIT */ 674 if (arch == ARCH_S390X) { 675 pr_alert("The 32-bit dump tool cannot be used for a " 676 "64-bit system\n"); 677 rc = -EINVAL; 678 goto fail; 679 } 680 #endif /* CONFIG_64BIT */ 681 682 rc = sys_info_init(arch); 683 if (rc) 684 goto fail; 685 686 rc = zcore_header_init(arch, &zcore_header); 687 if (rc) 688 goto fail; 689 690 rc = zcore_reipl_init(); 691 if (rc) 692 goto fail; 693 694 zcore_dir = debugfs_create_dir("zcore" , NULL); 695 if (!zcore_dir) { 696 rc = -ENOMEM; 697 goto fail; 698 } 699 zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, 700 &zcore_fops); 701 if (!zcore_file) { 702 rc = -ENOMEM; 703 goto fail_dir; 704 } 705 zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir, 706 NULL, &zcore_memmap_fops); 707 if (!zcore_memmap_file) { 708 rc = -ENOMEM; 709 goto fail_file; 710 } 711 zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir, 712 NULL, &zcore_reipl_fops); 713 if (!zcore_reipl_file) { 714 rc = -ENOMEM; 715 goto fail_memmap_file; 716 } 717 hsa_available = 1; 718 return 0; 719 720 fail_memmap_file: 721 debugfs_remove(zcore_memmap_file); 722 fail_file: 723 debugfs_remove(zcore_file); 724 fail_dir: 725 debugfs_remove(zcore_dir); 726 fail: 727 diag308(DIAG308_REL_HSA, NULL); 728 return rc; 729 } 730 731 static void __exit zcore_exit(void) 732 { 733 debug_unregister(zcore_dbf); 734 sclp_sdias_exit(); 735 free_page((unsigned long) ipl_block); 736 debugfs_remove(zcore_reipl_file); 737 debugfs_remove(zcore_memmap_file); 738 debugfs_remove(zcore_file); 739 debugfs_remove(zcore_dir); 740 diag308(DIAG308_REL_HSA, NULL); 741 } 742 743 MODULE_AUTHOR("Copyright IBM Corp. 2003,2008"); 744 MODULE_DESCRIPTION("zcore module for zfcpdump support"); 745 MODULE_LICENSE("GPL"); 746 747 subsys_initcall(zcore_init); 748 module_exit(zcore_exit); 749