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 <asm/asm-offsets.h> 20 #include <asm/ipl.h> 21 #include <asm/sclp.h> 22 #include <asm/setup.h> 23 #include <asm/sigp.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 memcpy_real_user(void __user *dest, unsigned long src, size_t count) 146 { 147 static char buf[4096]; 148 int offs = 0, size; 149 150 while (offs < count) { 151 size = min(sizeof(buf), count - offs); 152 if (memcpy_real(buf, (void *) src + offs, size)) 153 return -EFAULT; 154 if (copy_to_user(dest + offs, buf, size)) 155 return -EFAULT; 156 offs += size; 157 } 158 return 0; 159 } 160 161 static int __init init_cpu_info(enum arch_id arch) 162 { 163 struct save_area *sa; 164 165 /* get info for boot cpu from lowcore, stored in the HSA */ 166 167 sa = kmalloc(sizeof(*sa), GFP_KERNEL); 168 if (!sa) 169 return -ENOMEM; 170 if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) { 171 TRACE("could not copy from HSA\n"); 172 kfree(sa); 173 return -EIO; 174 } 175 zfcpdump_save_areas[0] = sa; 176 return 0; 177 } 178 179 static DEFINE_MUTEX(zcore_mutex); 180 181 #define DUMP_VERSION 0x5 182 #define DUMP_MAGIC 0xa8190173618f23fdULL 183 #define DUMP_ARCH_S390X 2 184 #define DUMP_ARCH_S390 1 185 #define HEADER_SIZE 4096 186 187 /* dump header dumped according to s390 crash dump format */ 188 189 struct zcore_header { 190 u64 magic; 191 u32 version; 192 u32 header_size; 193 u32 dump_level; 194 u32 page_size; 195 u64 mem_size; 196 u64 mem_start; 197 u64 mem_end; 198 u32 num_pages; 199 u32 pad1; 200 u64 tod; 201 struct cpuid cpu_id; 202 u32 arch_id; 203 u32 volnr; 204 u32 build_arch; 205 u64 rmem_size; 206 u8 mvdump; 207 u16 cpu_cnt; 208 u16 real_cpu_cnt; 209 u8 end_pad1[0x200-0x061]; 210 u64 mvdump_sign; 211 u64 mvdump_zipl_time; 212 u8 end_pad2[0x800-0x210]; 213 u32 lc_vec[512]; 214 } __attribute__((packed,__aligned__(16))); 215 216 static struct zcore_header zcore_header = { 217 .magic = DUMP_MAGIC, 218 .version = DUMP_VERSION, 219 .header_size = 4096, 220 .dump_level = 0, 221 .page_size = PAGE_SIZE, 222 .mem_start = 0, 223 #ifdef CONFIG_64BIT 224 .build_arch = DUMP_ARCH_S390X, 225 #else 226 .build_arch = DUMP_ARCH_S390, 227 #endif 228 }; 229 230 /* 231 * Copy lowcore info to buffer. Use map in order to copy only register parts. 232 * 233 * @buf: User buffer 234 * @sa: Pointer to save area 235 * @sa_off: Offset in save area to copy 236 * @len: Number of bytes to copy 237 */ 238 static int copy_lc(void __user *buf, void *sa, int sa_off, int len) 239 { 240 int i; 241 char *lc_mask = (char*)&sys_info.lc_mask; 242 243 for (i = 0; i < len; i++) { 244 if (!lc_mask[i + sa_off]) 245 continue; 246 if (copy_to_user(buf + i, sa + sa_off + i, 1)) 247 return -EFAULT; 248 } 249 return 0; 250 } 251 252 /* 253 * Copy lowcores info to memory, if necessary 254 * 255 * @buf: User buffer 256 * @addr: Start address of buffer in dump memory 257 * @count: Size of buffer 258 */ 259 static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) 260 { 261 unsigned long end; 262 int i = 0; 263 264 if (count == 0) 265 return 0; 266 267 end = start + count; 268 while (zfcpdump_save_areas[i]) { 269 unsigned long cp_start, cp_end; /* copy range */ 270 unsigned long sa_start, sa_end; /* save area range */ 271 unsigned long prefix; 272 unsigned long sa_off, len, buf_off; 273 274 prefix = zfcpdump_save_areas[i]->pref_reg; 275 sa_start = prefix + sys_info.sa_base; 276 sa_end = prefix + sys_info.sa_base + sys_info.sa_size; 277 278 if ((end < sa_start) || (start > sa_end)) 279 goto next; 280 cp_start = max(start, sa_start); 281 cp_end = min(end, sa_end); 282 283 buf_off = cp_start - start; 284 sa_off = cp_start - sa_start; 285 len = cp_end - cp_start; 286 287 TRACE("copy_lc for: %lx\n", start); 288 if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len)) 289 return -EFAULT; 290 next: 291 i++; 292 } 293 return 0; 294 } 295 296 /* 297 * Read routine for zcore character device 298 * First 4K are dump header 299 * Next 32MB are HSA Memory 300 * Rest is read from absolute Memory 301 */ 302 static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, 303 loff_t *ppos) 304 { 305 unsigned long mem_start; /* Start address in memory */ 306 size_t mem_offs; /* Offset in dump memory */ 307 size_t hdr_count; /* Size of header part of output buffer */ 308 size_t size; 309 int rc; 310 311 mutex_lock(&zcore_mutex); 312 313 if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { 314 rc = -EINVAL; 315 goto fail; 316 } 317 318 count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); 319 320 /* Copy dump header */ 321 if (*ppos < HEADER_SIZE) { 322 size = min(count, (size_t) (HEADER_SIZE - *ppos)); 323 if (copy_to_user(buf, &zcore_header + *ppos, size)) { 324 rc = -EFAULT; 325 goto fail; 326 } 327 hdr_count = size; 328 mem_start = 0; 329 } else { 330 hdr_count = 0; 331 mem_start = *ppos - HEADER_SIZE; 332 } 333 334 mem_offs = 0; 335 336 /* Copy from HSA data */ 337 if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) { 338 size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE 339 - mem_start)); 340 rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); 341 if (rc) 342 goto fail; 343 344 mem_offs += size; 345 } 346 347 /* Copy from real mem */ 348 size = count - mem_offs - hdr_count; 349 rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs, 350 size); 351 if (rc) 352 goto fail; 353 354 /* 355 * Since s390 dump analysis tools like lcrash or crash 356 * expect register sets in the prefix pages of the cpus, 357 * we copy them into the read buffer, if necessary. 358 * buf + hdr_count: Start of memory part of output buffer 359 * mem_start: Start memory address to copy from 360 * count - hdr_count: Size of memory area to copy 361 */ 362 if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { 363 rc = -EFAULT; 364 goto fail; 365 } 366 *ppos += count; 367 fail: 368 mutex_unlock(&zcore_mutex); 369 return (rc < 0) ? rc : count; 370 } 371 372 static int zcore_open(struct inode *inode, struct file *filp) 373 { 374 if (!hsa_available) 375 return -ENODATA; 376 else 377 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; 378 } 379 380 static int zcore_release(struct inode *inode, struct file *filep) 381 { 382 diag308(DIAG308_REL_HSA, NULL); 383 hsa_available = 0; 384 return 0; 385 } 386 387 static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) 388 { 389 loff_t rc; 390 391 mutex_lock(&zcore_mutex); 392 switch (orig) { 393 case 0: 394 file->f_pos = offset; 395 rc = file->f_pos; 396 break; 397 case 1: 398 file->f_pos += offset; 399 rc = file->f_pos; 400 break; 401 default: 402 rc = -EINVAL; 403 } 404 mutex_unlock(&zcore_mutex); 405 return rc; 406 } 407 408 static const struct file_operations zcore_fops = { 409 .owner = THIS_MODULE, 410 .llseek = zcore_lseek, 411 .read = zcore_read, 412 .open = zcore_open, 413 .release = zcore_release, 414 }; 415 416 static ssize_t zcore_memmap_read(struct file *filp, char __user *buf, 417 size_t count, loff_t *ppos) 418 { 419 return simple_read_from_buffer(buf, count, ppos, filp->private_data, 420 MEMORY_CHUNKS * CHUNK_INFO_SIZE); 421 } 422 423 static int zcore_memmap_open(struct inode *inode, struct file *filp) 424 { 425 int i; 426 char *buf; 427 struct mem_chunk *chunk_array; 428 429 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 430 GFP_KERNEL); 431 if (!chunk_array) 432 return -ENOMEM; 433 detect_memory_layout(chunk_array); 434 buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL); 435 if (!buf) { 436 kfree(chunk_array); 437 return -ENOMEM; 438 } 439 for (i = 0; i < MEMORY_CHUNKS; i++) { 440 sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ", 441 (unsigned long long) chunk_array[i].addr, 442 (unsigned long long) chunk_array[i].size); 443 if (chunk_array[i].size == 0) 444 break; 445 } 446 kfree(chunk_array); 447 filp->private_data = buf; 448 return nonseekable_open(inode, filp); 449 } 450 451 static int zcore_memmap_release(struct inode *inode, struct file *filp) 452 { 453 kfree(filp->private_data); 454 return 0; 455 } 456 457 static const struct file_operations zcore_memmap_fops = { 458 .owner = THIS_MODULE, 459 .read = zcore_memmap_read, 460 .open = zcore_memmap_open, 461 .release = zcore_memmap_release, 462 }; 463 464 static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf, 465 size_t count, loff_t *ppos) 466 { 467 if (ipl_block) { 468 diag308(DIAG308_SET, ipl_block); 469 diag308(DIAG308_IPL, NULL); 470 } 471 return count; 472 } 473 474 static int zcore_reipl_open(struct inode *inode, struct file *filp) 475 { 476 return nonseekable_open(inode, filp); 477 } 478 479 static int zcore_reipl_release(struct inode *inode, struct file *filp) 480 { 481 return 0; 482 } 483 484 static const struct file_operations zcore_reipl_fops = { 485 .owner = THIS_MODULE, 486 .write = zcore_reipl_write, 487 .open = zcore_reipl_open, 488 .release = zcore_reipl_release, 489 }; 490 491 #ifdef CONFIG_32BIT 492 493 static void __init set_lc_mask(struct save_area *map) 494 { 495 memset(&map->ext_save, 0xff, sizeof(map->ext_save)); 496 memset(&map->timer, 0xff, sizeof(map->timer)); 497 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); 498 memset(&map->psw, 0xff, sizeof(map->psw)); 499 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); 500 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); 501 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); 502 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); 503 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); 504 } 505 506 #else /* CONFIG_32BIT */ 507 508 static void __init set_lc_mask(struct save_area *map) 509 { 510 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); 511 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); 512 memset(&map->psw, 0xff, sizeof(map->psw)); 513 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); 514 memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg)); 515 memset(&map->tod_reg, 0xff, sizeof(map->tod_reg)); 516 memset(&map->timer, 0xff, sizeof(map->timer)); 517 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); 518 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); 519 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); 520 } 521 522 #endif /* CONFIG_32BIT */ 523 524 /* 525 * Initialize dump globals for a given architecture 526 */ 527 static int __init sys_info_init(enum arch_id arch) 528 { 529 int rc; 530 531 switch (arch) { 532 case ARCH_S390X: 533 pr_alert("DETECTED 'S390X (64 bit) OS'\n"); 534 break; 535 case ARCH_S390: 536 pr_alert("DETECTED 'S390 (32 bit) OS'\n"); 537 break; 538 default: 539 pr_alert("0x%x is an unknown architecture.\n",arch); 540 return -EINVAL; 541 } 542 sys_info.sa_base = SAVE_AREA_BASE; 543 sys_info.sa_size = sizeof(struct save_area); 544 sys_info.arch = arch; 545 set_lc_mask(&sys_info.lc_mask); 546 rc = init_cpu_info(arch); 547 if (rc) 548 return rc; 549 sys_info.mem_size = real_memory_size; 550 551 return 0; 552 } 553 554 static int __init check_sdias(void) 555 { 556 int rc, act_hsa_size; 557 558 rc = sclp_sdias_blk_count(); 559 if (rc < 0) { 560 TRACE("Could not determine HSA size\n"); 561 return rc; 562 } 563 act_hsa_size = (rc - 1) * PAGE_SIZE; 564 if (act_hsa_size < ZFCPDUMP_HSA_SIZE) { 565 TRACE("HSA size too small: %i\n", act_hsa_size); 566 return -EINVAL; 567 } 568 return 0; 569 } 570 571 static int __init get_mem_size(unsigned long *mem) 572 { 573 int i; 574 struct mem_chunk *chunk_array; 575 576 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 577 GFP_KERNEL); 578 if (!chunk_array) 579 return -ENOMEM; 580 detect_memory_layout(chunk_array); 581 for (i = 0; i < MEMORY_CHUNKS; i++) { 582 if (chunk_array[i].size == 0) 583 break; 584 *mem += chunk_array[i].size; 585 } 586 kfree(chunk_array); 587 return 0; 588 } 589 590 static int __init zcore_header_init(int arch, struct zcore_header *hdr) 591 { 592 int rc, i; 593 unsigned long memory = 0; 594 u32 prefix; 595 596 if (arch == ARCH_S390X) 597 hdr->arch_id = DUMP_ARCH_S390X; 598 else 599 hdr->arch_id = DUMP_ARCH_S390; 600 rc = get_mem_size(&memory); 601 if (rc) 602 return rc; 603 hdr->mem_size = memory; 604 hdr->rmem_size = memory; 605 hdr->mem_end = sys_info.mem_size; 606 hdr->num_pages = memory / PAGE_SIZE; 607 hdr->tod = get_clock(); 608 get_cpu_id(&hdr->cpu_id); 609 for (i = 0; zfcpdump_save_areas[i]; i++) { 610 prefix = zfcpdump_save_areas[i]->pref_reg; 611 hdr->real_cpu_cnt++; 612 if (!prefix) 613 continue; 614 hdr->lc_vec[hdr->cpu_cnt] = prefix; 615 hdr->cpu_cnt++; 616 } 617 return 0; 618 } 619 620 /* 621 * Provide IPL parameter information block from either HSA or memory 622 * for future reipl 623 */ 624 static int __init zcore_reipl_init(void) 625 { 626 struct ipib_info ipib_info; 627 int rc; 628 629 rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info)); 630 if (rc) 631 return rc; 632 if (ipib_info.ipib == 0) 633 return 0; 634 ipl_block = (void *) __get_free_page(GFP_KERNEL); 635 if (!ipl_block) 636 return -ENOMEM; 637 if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE) 638 rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE); 639 else 640 rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE); 641 if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) != 642 ipib_info.checksum) { 643 TRACE("Checksum does not match\n"); 644 free_page((unsigned long) ipl_block); 645 ipl_block = NULL; 646 } 647 return 0; 648 } 649 650 static int __init zcore_init(void) 651 { 652 unsigned char arch; 653 int rc; 654 655 if (ipl_info.type != IPL_TYPE_FCP_DUMP) 656 return -ENODATA; 657 658 zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long)); 659 debug_register_view(zcore_dbf, &debug_sprintf_view); 660 debug_set_level(zcore_dbf, 6); 661 662 TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno); 663 TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn); 664 TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun); 665 666 rc = sclp_sdias_init(); 667 if (rc) 668 goto fail; 669 670 rc = check_sdias(); 671 if (rc) 672 goto fail; 673 674 rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); 675 if (rc) 676 goto fail; 677 678 #ifdef CONFIG_64BIT 679 if (arch == ARCH_S390) { 680 pr_alert("The 64-bit dump tool cannot be used for a " 681 "32-bit system\n"); 682 rc = -EINVAL; 683 goto fail; 684 } 685 #else /* CONFIG_64BIT */ 686 if (arch == ARCH_S390X) { 687 pr_alert("The 32-bit dump tool cannot be used for a " 688 "64-bit system\n"); 689 rc = -EINVAL; 690 goto fail; 691 } 692 #endif /* CONFIG_64BIT */ 693 694 rc = sys_info_init(arch); 695 if (rc) 696 goto fail; 697 698 rc = zcore_header_init(arch, &zcore_header); 699 if (rc) 700 goto fail; 701 702 rc = zcore_reipl_init(); 703 if (rc) 704 goto fail; 705 706 zcore_dir = debugfs_create_dir("zcore" , NULL); 707 if (!zcore_dir) { 708 rc = -ENOMEM; 709 goto fail; 710 } 711 zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, 712 &zcore_fops); 713 if (!zcore_file) { 714 rc = -ENOMEM; 715 goto fail_dir; 716 } 717 zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir, 718 NULL, &zcore_memmap_fops); 719 if (!zcore_memmap_file) { 720 rc = -ENOMEM; 721 goto fail_file; 722 } 723 zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir, 724 NULL, &zcore_reipl_fops); 725 if (!zcore_reipl_file) { 726 rc = -ENOMEM; 727 goto fail_memmap_file; 728 } 729 hsa_available = 1; 730 return 0; 731 732 fail_memmap_file: 733 debugfs_remove(zcore_memmap_file); 734 fail_file: 735 debugfs_remove(zcore_file); 736 fail_dir: 737 debugfs_remove(zcore_dir); 738 fail: 739 diag308(DIAG308_REL_HSA, NULL); 740 return rc; 741 } 742 743 static void __exit zcore_exit(void) 744 { 745 debug_unregister(zcore_dbf); 746 sclp_sdias_exit(); 747 free_page((unsigned long) ipl_block); 748 debugfs_remove(zcore_reipl_file); 749 debugfs_remove(zcore_memmap_file); 750 debugfs_remove(zcore_file); 751 debugfs_remove(zcore_dir); 752 diag308(DIAG308_REL_HSA, NULL); 753 } 754 755 MODULE_AUTHOR("Copyright IBM Corp. 2003,2008"); 756 MODULE_DESCRIPTION("zcore module for zfcpdump support"); 757 MODULE_LICENSE("GPL"); 758 759 subsys_initcall(zcore_init); 760 module_exit(zcore_exit); 761