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hypfs_diag.c
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1 /*
2  * Hypervisor filesystem for Linux on s390. Diag 204 and 224
3  * implementation.
4  *
5  * Copyright IBM Corp. 2006, 2008
6  * Author(s): Michael Holzheu <[email protected]>
7  */
8 
9 #define KMSG_COMPONENT "hypfs"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11 
12 #include <linux/types.h>
13 #include <linux/errno.h>
14 #include <linux/slab.h>
15 #include <linux/string.h>
16 #include <linux/vmalloc.h>
17 #include <linux/mm.h>
18 #include <asm/ebcdic.h>
19 #include "hypfs.h"
20 
21 #define LPAR_NAME_LEN 8 /* lpar name len in diag 204 data */
22 #define CPU_NAME_LEN 16 /* type name len of cpus in diag224 name table */
23 #define TMP_SIZE 64 /* size of temporary buffers */
24 
25 #define DBFS_D204_HDR_VERSION 0
26 
27 /* diag 204 subcodes */
28 enum diag204_sc {
30  SUBC_RSI = 5,
33 };
34 
35 /* The two available diag 204 data formats */
38  INFO_EXT = 0x00010000
39 };
40 
41 /* bit is set in flags, when physical cpu info is included in diag 204 data */
42 #define LPAR_PHYS_FLG 0x80
43 
44 static char *diag224_cpu_names; /* diag 224 name table */
45 static enum diag204_sc diag204_store_sc; /* used subcode for store */
46 static enum diag204_format diag204_info_type; /* used diag 204 data format */
47 
48 static void *diag204_buf; /* 4K aligned buffer for diag204 data */
49 static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */
50 static int diag204_buf_pages; /* number of pages for diag204 data */
51 
52 static struct dentry *dbfs_d204_file;
53 
54 /*
55  * DIAG 204 data structures and member access functions.
56  *
57  * Since we have two different diag 204 data formats for old and new s390
58  * machines, we do not access the structs directly, but use getter functions for
59  * each struct member instead. This should make the code more readable.
60  */
61 
62 /* Time information block */
63 
64 struct info_blk_hdr {
71 } __attribute__ ((packed));
72 
81  char reserved[40];
82 } __attribute__ ((packed));
83 
84 static inline int info_blk_hdr__size(enum diag204_format type)
85 {
86  if (type == INFO_SIMPLE)
87  return sizeof(struct info_blk_hdr);
88  else /* INFO_EXT */
89  return sizeof(struct x_info_blk_hdr);
90 }
91 
92 static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr)
93 {
94  if (type == INFO_SIMPLE)
95  return ((struct info_blk_hdr *)hdr)->npar;
96  else /* INFO_EXT */
97  return ((struct x_info_blk_hdr *)hdr)->npar;
98 }
99 
100 static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr)
101 {
102  if (type == INFO_SIMPLE)
103  return ((struct info_blk_hdr *)hdr)->flags;
104  else /* INFO_EXT */
105  return ((struct x_info_blk_hdr *)hdr)->flags;
106 }
107 
108 static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr)
109 {
110  if (type == INFO_SIMPLE)
111  return ((struct info_blk_hdr *)hdr)->phys_cpus;
112  else /* INFO_EXT */
113  return ((struct x_info_blk_hdr *)hdr)->phys_cpus;
114 }
115 
116 /* Partition header */
117 
118 struct part_hdr {
121  char reserved[6];
123 } __attribute__ ((packed));
125 struct x_part_hdr {
132  char lpc_name[8];
133  char os_name[8];
137  char reserved1[3];
139  char group_name[8];
140  char reserved2[32];
141 } __attribute__ ((packed));
142 
143 static inline int part_hdr__size(enum diag204_format type)
144 {
145  if (type == INFO_SIMPLE)
146  return sizeof(struct part_hdr);
147  else /* INFO_EXT */
148  return sizeof(struct x_part_hdr);
149 }
151 static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr)
152 {
153  if (type == INFO_SIMPLE)
154  return ((struct part_hdr *)hdr)->cpus;
155  else /* INFO_EXT */
156  return ((struct x_part_hdr *)hdr)->rcpus;
157 }
158 
159 static inline void part_hdr__part_name(enum diag204_format type, void *hdr,
160  char *name)
161 {
162  if (type == INFO_SIMPLE)
163  memcpy(name, ((struct part_hdr *)hdr)->part_name,
164  LPAR_NAME_LEN);
165  else /* INFO_EXT */
166  memcpy(name, ((struct x_part_hdr *)hdr)->part_name,
167  LPAR_NAME_LEN);
168  EBCASC(name, LPAR_NAME_LEN);
169  name[LPAR_NAME_LEN] = 0;
170  strim(name);
171 }
172 
173 struct cpu_info {
175  char reserved1[2];
181 } __attribute__ ((packed));
183 struct x_cpu_info {
185  char reserved1[2];
194  char reseved2[2];
199  char reserved3[40];
200 } __attribute__ ((packed));
201 
202 /* CPU info block */
203 
204 static inline int cpu_info__size(enum diag204_format type)
205 {
206  if (type == INFO_SIMPLE)
207  return sizeof(struct cpu_info);
208  else /* INFO_EXT */
209  return sizeof(struct x_cpu_info);
210 }
212 static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr)
213 {
214  if (type == INFO_SIMPLE)
215  return ((struct cpu_info *)hdr)->ctidx;
216  else /* INFO_EXT */
217  return ((struct x_cpu_info *)hdr)->ctidx;
218 }
219 
220 static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr)
221 {
222  if (type == INFO_SIMPLE)
223  return ((struct cpu_info *)hdr)->cpu_addr;
224  else /* INFO_EXT */
225  return ((struct x_cpu_info *)hdr)->cpu_addr;
226 }
227 
228 static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr)
229 {
230  if (type == INFO_SIMPLE)
231  return ((struct cpu_info *)hdr)->acc_time;
232  else /* INFO_EXT */
233  return ((struct x_cpu_info *)hdr)->acc_time;
234 }
235 
236 static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr)
237 {
238  if (type == INFO_SIMPLE)
239  return ((struct cpu_info *)hdr)->lp_time;
240  else /* INFO_EXT */
241  return ((struct x_cpu_info *)hdr)->lp_time;
242 }
243 
244 static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr)
245 {
246  if (type == INFO_SIMPLE)
247  return 0; /* online_time not available in simple info */
248  else /* INFO_EXT */
249  return ((struct x_cpu_info *)hdr)->online_time;
250 }
251 
252 /* Physical header */
253 
254 struct phys_hdr {
255  char reserved1[1];
257  char reserved2[6];
258  char mgm_name[8];
259 } __attribute__ ((packed));
260 
261 struct x_phys_hdr {
262  char reserved1[1];
264  char reserved2[6];
265  char mgm_name[8];
266  char reserved3[80];
267 } __attribute__ ((packed));
268 
269 static inline int phys_hdr__size(enum diag204_format type)
270 {
271  if (type == INFO_SIMPLE)
272  return sizeof(struct phys_hdr);
273  else /* INFO_EXT */
274  return sizeof(struct x_phys_hdr);
275 }
276 
277 static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr)
278 {
279  if (type == INFO_SIMPLE)
280  return ((struct phys_hdr *)hdr)->cpus;
281  else /* INFO_EXT */
282  return ((struct x_phys_hdr *)hdr)->cpus;
283 }
284 
285 /* Physical CPU info block */
286 
287 struct phys_cpu {
289  char reserved1[2];
291  char reserved2[3];
293  char reserved3[8];
294 } __attribute__ ((packed));
295 
296 struct x_phys_cpu {
298  char reserved1[2];
300  char reserved2[3];
302  char reserved3[80];
303 } __attribute__ ((packed));
304 
305 static inline int phys_cpu__size(enum diag204_format type)
306 {
307  if (type == INFO_SIMPLE)
308  return sizeof(struct phys_cpu);
309  else /* INFO_EXT */
310  return sizeof(struct x_phys_cpu);
311 }
312 
313 static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr)
314 {
315  if (type == INFO_SIMPLE)
316  return ((struct phys_cpu *)hdr)->cpu_addr;
317  else /* INFO_EXT */
318  return ((struct x_phys_cpu *)hdr)->cpu_addr;
319 }
320 
321 static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr)
322 {
323  if (type == INFO_SIMPLE)
324  return ((struct phys_cpu *)hdr)->mgm_time;
325  else /* INFO_EXT */
326  return ((struct x_phys_cpu *)hdr)->mgm_time;
327 }
328 
329 static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr)
330 {
331  if (type == INFO_SIMPLE)
332  return ((struct phys_cpu *)hdr)->ctidx;
333  else /* INFO_EXT */
334  return ((struct x_phys_cpu *)hdr)->ctidx;
335 }
336 
337 /* Diagnose 204 functions */
338 
339 static int diag204(unsigned long subcode, unsigned long size, void *addr)
340 {
341  register unsigned long _subcode asm("0") = subcode;
342  register unsigned long _size asm("1") = size;
343 
344  asm volatile(
345  " diag %2,%0,0x204\n"
346  "0:\n"
347  EX_TABLE(0b,0b)
348  : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
349  if (_subcode)
350  return -1;
351  return _size;
352 }
353 
354 /*
355  * For the old diag subcode 4 with simple data format we have to use real
356  * memory. If we use subcode 6 or 7 with extended data format, we can (and
357  * should) use vmalloc, since we need a lot of memory in that case. Currently
358  * up to 93 pages!
359  */
360 
361 static void diag204_free_buffer(void)
362 {
363  if (!diag204_buf)
364  return;
365  if (diag204_buf_vmalloc) {
366  vfree(diag204_buf_vmalloc);
367  diag204_buf_vmalloc = NULL;
368  } else {
369  free_pages((unsigned long) diag204_buf, 0);
370  }
371  diag204_buf = NULL;
372 }
373 
374 static void *page_align_ptr(void *ptr)
375 {
376  return (void *) PAGE_ALIGN((unsigned long) ptr);
377 }
378 
379 static void *diag204_alloc_vbuf(int pages)
380 {
381  /* The buffer has to be page aligned! */
382  diag204_buf_vmalloc = vmalloc(PAGE_SIZE * (pages + 1));
383  if (!diag204_buf_vmalloc)
384  return ERR_PTR(-ENOMEM);
385  diag204_buf = page_align_ptr(diag204_buf_vmalloc);
386  diag204_buf_pages = pages;
387  return diag204_buf;
388 }
389 
390 static void *diag204_alloc_rbuf(void)
391 {
392  diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0);
393  if (!diag204_buf)
394  return ERR_PTR(-ENOMEM);
395  diag204_buf_pages = 1;
396  return diag204_buf;
397 }
398 
399 static void *diag204_get_buffer(enum diag204_format fmt, int *pages)
400 {
401  if (diag204_buf) {
402  *pages = diag204_buf_pages;
403  return diag204_buf;
404  }
405  if (fmt == INFO_SIMPLE) {
406  *pages = 1;
407  return diag204_alloc_rbuf();
408  } else {/* INFO_EXT */
409  *pages = diag204((unsigned long)SUBC_RSI |
410  (unsigned long)INFO_EXT, 0, NULL);
411  if (*pages <= 0)
412  return ERR_PTR(-ENOSYS);
413  else
414  return diag204_alloc_vbuf(*pages);
415  }
416 }
417 
418 /*
419  * diag204_probe() has to find out, which type of diagnose 204 implementation
420  * we have on our machine. Currently there are three possible scanarios:
421  * - subcode 4 + simple data format (only one page)
422  * - subcode 4-6 + extended data format
423  * - subcode 4-7 + extended data format
424  *
425  * Subcode 5 is used to retrieve the size of the data, provided by subcodes
426  * 6 and 7. Subcode 7 basically has the same function as subcode 6. In addition
427  * to subcode 6 it provides also information about secondary cpus.
428  * In order to get as much information as possible, we first try
429  * subcode 7, then 6 and if both fail, we use subcode 4.
430  */
431 
432 static int diag204_probe(void)
433 {
434  void *buf;
435  int pages, rc;
436 
437  buf = diag204_get_buffer(INFO_EXT, &pages);
438  if (!IS_ERR(buf)) {
439  if (diag204((unsigned long)SUBC_STIB7 |
440  (unsigned long)INFO_EXT, pages, buf) >= 0) {
441  diag204_store_sc = SUBC_STIB7;
442  diag204_info_type = INFO_EXT;
443  goto out;
444  }
445  if (diag204((unsigned long)SUBC_STIB6 |
446  (unsigned long)INFO_EXT, pages, buf) >= 0) {
447  diag204_store_sc = SUBC_STIB6;
448  diag204_info_type = INFO_EXT;
449  goto out;
450  }
451  diag204_free_buffer();
452  }
453 
454  /* subcodes 6 and 7 failed, now try subcode 4 */
455 
456  buf = diag204_get_buffer(INFO_SIMPLE, &pages);
457  if (IS_ERR(buf)) {
458  rc = PTR_ERR(buf);
459  goto fail_alloc;
460  }
461  if (diag204((unsigned long)SUBC_STIB4 |
462  (unsigned long)INFO_SIMPLE, pages, buf) >= 0) {
463  diag204_store_sc = SUBC_STIB4;
464  diag204_info_type = INFO_SIMPLE;
465  goto out;
466  } else {
467  rc = -ENOSYS;
468  goto fail_store;
469  }
470 out:
471  rc = 0;
472 fail_store:
473  diag204_free_buffer();
474 fail_alloc:
475  return rc;
476 }
477 
478 static int diag204_do_store(void *buf, int pages)
479 {
480  int rc;
481 
482  rc = diag204((unsigned long) diag204_store_sc |
483  (unsigned long) diag204_info_type, pages, buf);
484  return rc < 0 ? -ENOSYS : 0;
485 }
486 
487 static void *diag204_store(void)
488 {
489  void *buf;
490  int pages, rc;
491 
492  buf = diag204_get_buffer(diag204_info_type, &pages);
493  if (IS_ERR(buf))
494  goto out;
495  rc = diag204_do_store(buf, pages);
496  if (rc)
497  return ERR_PTR(rc);
498 out:
499  return buf;
500 }
501 
502 /* Diagnose 224 functions */
503 
504 static int diag224(void *ptr)
505 {
506  int rc = -EOPNOTSUPP;
507 
508  asm volatile(
509  " diag %1,%2,0x224\n"
510  "0: lhi %0,0x0\n"
511  "1:\n"
512  EX_TABLE(0b,1b)
513  : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
514  return rc;
515 }
516 
517 static int diag224_get_name_table(void)
518 {
519  /* memory must be below 2GB */
520  diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
521  if (!diag224_cpu_names)
522  return -ENOMEM;
523  if (diag224(diag224_cpu_names)) {
524  kfree(diag224_cpu_names);
525  return -EOPNOTSUPP;
526  }
527  EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
528  return 0;
529 }
530 
531 static void diag224_delete_name_table(void)
532 {
533  kfree(diag224_cpu_names);
534 }
535 
536 static int diag224_idx2name(int index, char *name)
537 {
538  memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN),
539  CPU_NAME_LEN);
540  name[CPU_NAME_LEN] = 0;
541  strim(name);
542  return 0;
543 }
544 
546  u64 len; /* Length of d204 buffer without header */
547  u16 version; /* Version of header */
548  u8 sc; /* Used subcode */
549  char reserved[53];
550 } __attribute__ ((packed));
552 struct dbfs_d204 {
553  struct dbfs_d204_hdr hdr; /* 64 byte header */
554  char buf[]; /* d204 buffer */
555 } __attribute__ ((packed));
557 static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
558 {
559  struct dbfs_d204 *d204;
560  int rc, buf_size;
561  void *base;
562 
563  buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
564  base = vzalloc(buf_size);
565  if (!base)
566  return -ENOMEM;
567  d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr);
568  rc = diag204_do_store(d204->buf, diag204_buf_pages);
569  if (rc) {
570  vfree(base);
571  return rc;
572  }
573  d204->hdr.version = DBFS_D204_HDR_VERSION;
574  d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
575  d204->hdr.sc = diag204_store_sc;
576  *data = d204;
577  *data_free_ptr = base;
578  *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr);
579  return 0;
580 }
581 
582 static struct hypfs_dbfs_file dbfs_file_d204 = {
583  .name = "diag_204",
584  .data_create = dbfs_d204_create,
585  .data_free = vfree,
586 };
587 
589 {
590  int rc;
591 
592  if (diag204_probe()) {
593  pr_err("The hardware system does not support hypfs\n");
594  return -ENODATA;
595  }
596  if (diag204_info_type == INFO_EXT) {
597  rc = hypfs_dbfs_create_file(&dbfs_file_d204);
598  if (rc)
599  return rc;
600  }
601  if (MACHINE_IS_LPAR) {
602  rc = diag224_get_name_table();
603  if (rc) {
604  pr_err("The hardware system does not provide all "
605  "functions required by hypfs\n");
606  debugfs_remove(dbfs_d204_file);
607  return rc;
608  }
609  }
610  return 0;
611 }
612 
613 void hypfs_diag_exit(void)
614 {
615  debugfs_remove(dbfs_d204_file);
616  diag224_delete_name_table();
617  diag204_free_buffer();
618  hypfs_dbfs_remove_file(&dbfs_file_d204);
619 }
620 
621 /*
622  * Functions to create the directory structure
623  * *******************************************
624  */
625 
626 static int hypfs_create_cpu_files(struct super_block *sb,
627  struct dentry *cpus_dir, void *cpu_info)
628 {
629  struct dentry *cpu_dir;
630  char buffer[TMP_SIZE];
631  void *rc;
632 
633  snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
634  cpu_info));
635  cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
636  rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
637  cpu_info__acc_time(diag204_info_type, cpu_info) -
638  cpu_info__lp_time(diag204_info_type, cpu_info));
639  if (IS_ERR(rc))
640  return PTR_ERR(rc);
641  rc = hypfs_create_u64(sb, cpu_dir, "cputime",
642  cpu_info__lp_time(diag204_info_type, cpu_info));
643  if (IS_ERR(rc))
644  return PTR_ERR(rc);
645  if (diag204_info_type == INFO_EXT) {
646  rc = hypfs_create_u64(sb, cpu_dir, "onlinetime",
647  cpu_info__online_time(diag204_info_type,
648  cpu_info));
649  if (IS_ERR(rc))
650  return PTR_ERR(rc);
651  }
652  diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
653  rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
654  if (IS_ERR(rc))
655  return PTR_ERR(rc);
656  return 0;
657 }
658 
659 static void *hypfs_create_lpar_files(struct super_block *sb,
660  struct dentry *systems_dir, void *part_hdr)
661 {
662  struct dentry *cpus_dir;
663  struct dentry *lpar_dir;
664  char lpar_name[LPAR_NAME_LEN + 1];
665  void *cpu_info;
666  int i;
667 
668  part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
669  lpar_name[LPAR_NAME_LEN] = 0;
670  lpar_dir = hypfs_mkdir(sb, systems_dir, lpar_name);
671  if (IS_ERR(lpar_dir))
672  return lpar_dir;
673  cpus_dir = hypfs_mkdir(sb, lpar_dir, "cpus");
674  if (IS_ERR(cpus_dir))
675  return cpus_dir;
676  cpu_info = part_hdr + part_hdr__size(diag204_info_type);
677  for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
678  int rc;
679  rc = hypfs_create_cpu_files(sb, cpus_dir, cpu_info);
680  if (rc)
681  return ERR_PTR(rc);
682  cpu_info += cpu_info__size(diag204_info_type);
683  }
684  return cpu_info;
685 }
686 
687 static int hypfs_create_phys_cpu_files(struct super_block *sb,
688  struct dentry *cpus_dir, void *cpu_info)
689 {
690  struct dentry *cpu_dir;
691  char buffer[TMP_SIZE];
692  void *rc;
693 
694  snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
695  cpu_info));
696  cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
697  if (IS_ERR(cpu_dir))
698  return PTR_ERR(cpu_dir);
699  rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
700  phys_cpu__mgm_time(diag204_info_type, cpu_info));
701  if (IS_ERR(rc))
702  return PTR_ERR(rc);
703  diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
704  rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
705  if (IS_ERR(rc))
706  return PTR_ERR(rc);
707  return 0;
708 }
709 
710 static void *hypfs_create_phys_files(struct super_block *sb,
711  struct dentry *parent_dir, void *phys_hdr)
712 {
713  int i;
714  void *cpu_info;
715  struct dentry *cpus_dir;
716 
717  cpus_dir = hypfs_mkdir(sb, parent_dir, "cpus");
718  if (IS_ERR(cpus_dir))
719  return cpus_dir;
720  cpu_info = phys_hdr + phys_hdr__size(diag204_info_type);
721  for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) {
722  int rc;
723  rc = hypfs_create_phys_cpu_files(sb, cpus_dir, cpu_info);
724  if (rc)
725  return ERR_PTR(rc);
726  cpu_info += phys_cpu__size(diag204_info_type);
727  }
728  return cpu_info;
729 }
730 
731 int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
732 {
733  struct dentry *systems_dir, *hyp_dir;
734  void *time_hdr, *part_hdr;
735  int i, rc;
736  void *buffer, *ptr;
737 
738  buffer = diag204_store();
739  if (IS_ERR(buffer))
740  return PTR_ERR(buffer);
741 
742  systems_dir = hypfs_mkdir(sb, root, "systems");
743  if (IS_ERR(systems_dir)) {
744  rc = PTR_ERR(systems_dir);
745  goto err_out;
746  }
747  time_hdr = (struct x_info_blk_hdr *)buffer;
748  part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type);
749  for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) {
750  part_hdr = hypfs_create_lpar_files(sb, systems_dir, part_hdr);
751  if (IS_ERR(part_hdr)) {
752  rc = PTR_ERR(part_hdr);
753  goto err_out;
754  }
755  }
756  if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) {
757  ptr = hypfs_create_phys_files(sb, root, part_hdr);
758  if (IS_ERR(ptr)) {
759  rc = PTR_ERR(ptr);
760  goto err_out;
761  }
762  }
763  hyp_dir = hypfs_mkdir(sb, root, "hyp");
764  if (IS_ERR(hyp_dir)) {
765  rc = PTR_ERR(hyp_dir);
766  goto err_out;
767  }
768  ptr = hypfs_create_str(sb, hyp_dir, "type", "LPAR Hypervisor");
769  if (IS_ERR(ptr)) {
770  rc = PTR_ERR(ptr);
771  goto err_out;
772  }
773  rc = 0;
774 
775 err_out:
776  return rc;
777 }