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s390: avoid extable collisions
[deliverable/linux.git] / arch / s390 / hypfs / hypfs_diag.c
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 <holzheu@de.ibm.com>
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/diag.h>
19 #include <asm/ebcdic.h>
20 #include "hypfs.h"
21
22 #define LPAR_NAME_LEN 8 /* lpar name len in diag 204 data */
23 #define CPU_NAME_LEN 16 /* type name len of cpus in diag224 name table */
24 #define TMP_SIZE 64 /* size of temporary buffers */
25
26 #define DBFS_D204_HDR_VERSION 0
27
28 /* diag 204 subcodes */
29 enum diag204_sc {
30 SUBC_STIB4 = 4,
31 SUBC_RSI = 5,
32 SUBC_STIB6 = 6,
33 SUBC_STIB7 = 7
34 };
35
36 /* The two available diag 204 data formats */
37 enum diag204_format {
38 INFO_SIMPLE = 0,
39 INFO_EXT = 0x00010000
40 };
41
42 /* bit is set in flags, when physical cpu info is included in diag 204 data */
43 #define LPAR_PHYS_FLG 0x80
44
45 static char *diag224_cpu_names; /* diag 224 name table */
46 static enum diag204_sc diag204_store_sc; /* used subcode for store */
47 static enum diag204_format diag204_info_type; /* used diag 204 data format */
48
49 static void *diag204_buf; /* 4K aligned buffer for diag204 data */
50 static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */
51 static int diag204_buf_pages; /* number of pages for diag204 data */
52
53 static struct dentry *dbfs_d204_file;
54
55 /*
56 * DIAG 204 data structures and member access functions.
57 *
58 * Since we have two different diag 204 data formats for old and new s390
59 * machines, we do not access the structs directly, but use getter functions for
60 * each struct member instead. This should make the code more readable.
61 */
62
63 /* Time information block */
64
65 struct info_blk_hdr {
66 __u8 npar;
67 __u8 flags;
68 __u16 tslice;
69 __u16 phys_cpus;
70 __u16 this_part;
71 __u64 curtod;
72 } __attribute__ ((packed));
73
74 struct x_info_blk_hdr {
75 __u8 npar;
76 __u8 flags;
77 __u16 tslice;
78 __u16 phys_cpus;
79 __u16 this_part;
80 __u64 curtod1;
81 __u64 curtod2;
82 char reserved[40];
83 } __attribute__ ((packed));
84
85 static inline int info_blk_hdr__size(enum diag204_format type)
86 {
87 if (type == INFO_SIMPLE)
88 return sizeof(struct info_blk_hdr);
89 else /* INFO_EXT */
90 return sizeof(struct x_info_blk_hdr);
91 }
92
93 static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr)
94 {
95 if (type == INFO_SIMPLE)
96 return ((struct info_blk_hdr *)hdr)->npar;
97 else /* INFO_EXT */
98 return ((struct x_info_blk_hdr *)hdr)->npar;
99 }
100
101 static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr)
102 {
103 if (type == INFO_SIMPLE)
104 return ((struct info_blk_hdr *)hdr)->flags;
105 else /* INFO_EXT */
106 return ((struct x_info_blk_hdr *)hdr)->flags;
107 }
108
109 static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr)
110 {
111 if (type == INFO_SIMPLE)
112 return ((struct info_blk_hdr *)hdr)->phys_cpus;
113 else /* INFO_EXT */
114 return ((struct x_info_blk_hdr *)hdr)->phys_cpus;
115 }
116
117 /* Partition header */
118
119 struct part_hdr {
120 __u8 pn;
121 __u8 cpus;
122 char reserved[6];
123 char part_name[LPAR_NAME_LEN];
124 } __attribute__ ((packed));
125
126 struct x_part_hdr {
127 __u8 pn;
128 __u8 cpus;
129 __u8 rcpus;
130 __u8 pflag;
131 __u32 mlu;
132 char part_name[LPAR_NAME_LEN];
133 char lpc_name[8];
134 char os_name[8];
135 __u64 online_cs;
136 __u64 online_es;
137 __u8 upid;
138 char reserved1[3];
139 __u32 group_mlu;
140 char group_name[8];
141 char reserved2[32];
142 } __attribute__ ((packed));
143
144 static inline int part_hdr__size(enum diag204_format type)
145 {
146 if (type == INFO_SIMPLE)
147 return sizeof(struct part_hdr);
148 else /* INFO_EXT */
149 return sizeof(struct x_part_hdr);
150 }
151
152 static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr)
153 {
154 if (type == INFO_SIMPLE)
155 return ((struct part_hdr *)hdr)->cpus;
156 else /* INFO_EXT */
157 return ((struct x_part_hdr *)hdr)->rcpus;
158 }
159
160 static inline void part_hdr__part_name(enum diag204_format type, void *hdr,
161 char *name)
162 {
163 if (type == INFO_SIMPLE)
164 memcpy(name, ((struct part_hdr *)hdr)->part_name,
165 LPAR_NAME_LEN);
166 else /* INFO_EXT */
167 memcpy(name, ((struct x_part_hdr *)hdr)->part_name,
168 LPAR_NAME_LEN);
169 EBCASC(name, LPAR_NAME_LEN);
170 name[LPAR_NAME_LEN] = 0;
171 strim(name);
172 }
173
174 struct cpu_info {
175 __u16 cpu_addr;
176 char reserved1[2];
177 __u8 ctidx;
178 __u8 cflag;
179 __u16 weight;
180 __u64 acc_time;
181 __u64 lp_time;
182 } __attribute__ ((packed));
183
184 struct x_cpu_info {
185 __u16 cpu_addr;
186 char reserved1[2];
187 __u8 ctidx;
188 __u8 cflag;
189 __u16 weight;
190 __u64 acc_time;
191 __u64 lp_time;
192 __u16 min_weight;
193 __u16 cur_weight;
194 __u16 max_weight;
195 char reseved2[2];
196 __u64 online_time;
197 __u64 wait_time;
198 __u32 pma_weight;
199 __u32 polar_weight;
200 char reserved3[40];
201 } __attribute__ ((packed));
202
203 /* CPU info block */
204
205 static inline int cpu_info__size(enum diag204_format type)
206 {
207 if (type == INFO_SIMPLE)
208 return sizeof(struct cpu_info);
209 else /* INFO_EXT */
210 return sizeof(struct x_cpu_info);
211 }
212
213 static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr)
214 {
215 if (type == INFO_SIMPLE)
216 return ((struct cpu_info *)hdr)->ctidx;
217 else /* INFO_EXT */
218 return ((struct x_cpu_info *)hdr)->ctidx;
219 }
220
221 static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr)
222 {
223 if (type == INFO_SIMPLE)
224 return ((struct cpu_info *)hdr)->cpu_addr;
225 else /* INFO_EXT */
226 return ((struct x_cpu_info *)hdr)->cpu_addr;
227 }
228
229 static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr)
230 {
231 if (type == INFO_SIMPLE)
232 return ((struct cpu_info *)hdr)->acc_time;
233 else /* INFO_EXT */
234 return ((struct x_cpu_info *)hdr)->acc_time;
235 }
236
237 static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr)
238 {
239 if (type == INFO_SIMPLE)
240 return ((struct cpu_info *)hdr)->lp_time;
241 else /* INFO_EXT */
242 return ((struct x_cpu_info *)hdr)->lp_time;
243 }
244
245 static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr)
246 {
247 if (type == INFO_SIMPLE)
248 return 0; /* online_time not available in simple info */
249 else /* INFO_EXT */
250 return ((struct x_cpu_info *)hdr)->online_time;
251 }
252
253 /* Physical header */
254
255 struct phys_hdr {
256 char reserved1[1];
257 __u8 cpus;
258 char reserved2[6];
259 char mgm_name[8];
260 } __attribute__ ((packed));
261
262 struct x_phys_hdr {
263 char reserved1[1];
264 __u8 cpus;
265 char reserved2[6];
266 char mgm_name[8];
267 char reserved3[80];
268 } __attribute__ ((packed));
269
270 static inline int phys_hdr__size(enum diag204_format type)
271 {
272 if (type == INFO_SIMPLE)
273 return sizeof(struct phys_hdr);
274 else /* INFO_EXT */
275 return sizeof(struct x_phys_hdr);
276 }
277
278 static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr)
279 {
280 if (type == INFO_SIMPLE)
281 return ((struct phys_hdr *)hdr)->cpus;
282 else /* INFO_EXT */
283 return ((struct x_phys_hdr *)hdr)->cpus;
284 }
285
286 /* Physical CPU info block */
287
288 struct phys_cpu {
289 __u16 cpu_addr;
290 char reserved1[2];
291 __u8 ctidx;
292 char reserved2[3];
293 __u64 mgm_time;
294 char reserved3[8];
295 } __attribute__ ((packed));
296
297 struct x_phys_cpu {
298 __u16 cpu_addr;
299 char reserved1[2];
300 __u8 ctidx;
301 char reserved2[3];
302 __u64 mgm_time;
303 char reserved3[80];
304 } __attribute__ ((packed));
305
306 static inline int phys_cpu__size(enum diag204_format type)
307 {
308 if (type == INFO_SIMPLE)
309 return sizeof(struct phys_cpu);
310 else /* INFO_EXT */
311 return sizeof(struct x_phys_cpu);
312 }
313
314 static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr)
315 {
316 if (type == INFO_SIMPLE)
317 return ((struct phys_cpu *)hdr)->cpu_addr;
318 else /* INFO_EXT */
319 return ((struct x_phys_cpu *)hdr)->cpu_addr;
320 }
321
322 static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr)
323 {
324 if (type == INFO_SIMPLE)
325 return ((struct phys_cpu *)hdr)->mgm_time;
326 else /* INFO_EXT */
327 return ((struct x_phys_cpu *)hdr)->mgm_time;
328 }
329
330 static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr)
331 {
332 if (type == INFO_SIMPLE)
333 return ((struct phys_cpu *)hdr)->ctidx;
334 else /* INFO_EXT */
335 return ((struct x_phys_cpu *)hdr)->ctidx;
336 }
337
338 /* Diagnose 204 functions */
339
340 static inline int __diag204(unsigned long subcode, unsigned long size, void *addr)
341 {
342 register unsigned long _subcode asm("0") = subcode;
343 register unsigned long _size asm("1") = size;
344
345 asm volatile(
346 " diag %2,%0,0x204\n"
347 "0: nopr %%r7\n"
348 EX_TABLE(0b,0b)
349 : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
350 if (_subcode)
351 return -1;
352 return _size;
353 }
354
355 static int diag204(unsigned long subcode, unsigned long size, void *addr)
356 {
357 diag_stat_inc(DIAG_STAT_X204);
358 return __diag204(subcode, size, addr);
359 }
360
361 /*
362 * For the old diag subcode 4 with simple data format we have to use real
363 * memory. If we use subcode 6 or 7 with extended data format, we can (and
364 * should) use vmalloc, since we need a lot of memory in that case. Currently
365 * up to 93 pages!
366 */
367
368 static void diag204_free_buffer(void)
369 {
370 if (!diag204_buf)
371 return;
372 if (diag204_buf_vmalloc) {
373 vfree(diag204_buf_vmalloc);
374 diag204_buf_vmalloc = NULL;
375 } else {
376 free_pages((unsigned long) diag204_buf, 0);
377 }
378 diag204_buf = NULL;
379 }
380
381 static void *page_align_ptr(void *ptr)
382 {
383 return (void *) PAGE_ALIGN((unsigned long) ptr);
384 }
385
386 static void *diag204_alloc_vbuf(int pages)
387 {
388 /* The buffer has to be page aligned! */
389 diag204_buf_vmalloc = vmalloc(PAGE_SIZE * (pages + 1));
390 if (!diag204_buf_vmalloc)
391 return ERR_PTR(-ENOMEM);
392 diag204_buf = page_align_ptr(diag204_buf_vmalloc);
393 diag204_buf_pages = pages;
394 return diag204_buf;
395 }
396
397 static void *diag204_alloc_rbuf(void)
398 {
399 diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0);
400 if (!diag204_buf)
401 return ERR_PTR(-ENOMEM);
402 diag204_buf_pages = 1;
403 return diag204_buf;
404 }
405
406 static void *diag204_get_buffer(enum diag204_format fmt, int *pages)
407 {
408 if (diag204_buf) {
409 *pages = diag204_buf_pages;
410 return diag204_buf;
411 }
412 if (fmt == INFO_SIMPLE) {
413 *pages = 1;
414 return diag204_alloc_rbuf();
415 } else {/* INFO_EXT */
416 *pages = diag204((unsigned long)SUBC_RSI |
417 (unsigned long)INFO_EXT, 0, NULL);
418 if (*pages <= 0)
419 return ERR_PTR(-ENOSYS);
420 else
421 return diag204_alloc_vbuf(*pages);
422 }
423 }
424
425 /*
426 * diag204_probe() has to find out, which type of diagnose 204 implementation
427 * we have on our machine. Currently there are three possible scanarios:
428 * - subcode 4 + simple data format (only one page)
429 * - subcode 4-6 + extended data format
430 * - subcode 4-7 + extended data format
431 *
432 * Subcode 5 is used to retrieve the size of the data, provided by subcodes
433 * 6 and 7. Subcode 7 basically has the same function as subcode 6. In addition
434 * to subcode 6 it provides also information about secondary cpus.
435 * In order to get as much information as possible, we first try
436 * subcode 7, then 6 and if both fail, we use subcode 4.
437 */
438
439 static int diag204_probe(void)
440 {
441 void *buf;
442 int pages, rc;
443
444 buf = diag204_get_buffer(INFO_EXT, &pages);
445 if (!IS_ERR(buf)) {
446 if (diag204((unsigned long)SUBC_STIB7 |
447 (unsigned long)INFO_EXT, pages, buf) >= 0) {
448 diag204_store_sc = SUBC_STIB7;
449 diag204_info_type = INFO_EXT;
450 goto out;
451 }
452 if (diag204((unsigned long)SUBC_STIB6 |
453 (unsigned long)INFO_EXT, pages, buf) >= 0) {
454 diag204_store_sc = SUBC_STIB6;
455 diag204_info_type = INFO_EXT;
456 goto out;
457 }
458 diag204_free_buffer();
459 }
460
461 /* subcodes 6 and 7 failed, now try subcode 4 */
462
463 buf = diag204_get_buffer(INFO_SIMPLE, &pages);
464 if (IS_ERR(buf)) {
465 rc = PTR_ERR(buf);
466 goto fail_alloc;
467 }
468 if (diag204((unsigned long)SUBC_STIB4 |
469 (unsigned long)INFO_SIMPLE, pages, buf) >= 0) {
470 diag204_store_sc = SUBC_STIB4;
471 diag204_info_type = INFO_SIMPLE;
472 goto out;
473 } else {
474 rc = -ENOSYS;
475 goto fail_store;
476 }
477 out:
478 rc = 0;
479 fail_store:
480 diag204_free_buffer();
481 fail_alloc:
482 return rc;
483 }
484
485 static int diag204_do_store(void *buf, int pages)
486 {
487 int rc;
488
489 rc = diag204((unsigned long) diag204_store_sc |
490 (unsigned long) diag204_info_type, pages, buf);
491 return rc < 0 ? -ENOSYS : 0;
492 }
493
494 static void *diag204_store(void)
495 {
496 void *buf;
497 int pages, rc;
498
499 buf = diag204_get_buffer(diag204_info_type, &pages);
500 if (IS_ERR(buf))
501 goto out;
502 rc = diag204_do_store(buf, pages);
503 if (rc)
504 return ERR_PTR(rc);
505 out:
506 return buf;
507 }
508
509 /* Diagnose 224 functions */
510
511 static int diag224(void *ptr)
512 {
513 int rc = -EOPNOTSUPP;
514
515 diag_stat_inc(DIAG_STAT_X224);
516 asm volatile(
517 " diag %1,%2,0x224\n"
518 "0: lhi %0,0x0\n"
519 "1:\n"
520 EX_TABLE(0b,1b)
521 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
522 return rc;
523 }
524
525 static int diag224_get_name_table(void)
526 {
527 /* memory must be below 2GB */
528 diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
529 if (!diag224_cpu_names)
530 return -ENOMEM;
531 if (diag224(diag224_cpu_names)) {
532 kfree(diag224_cpu_names);
533 return -EOPNOTSUPP;
534 }
535 EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
536 return 0;
537 }
538
539 static void diag224_delete_name_table(void)
540 {
541 kfree(diag224_cpu_names);
542 }
543
544 static int diag224_idx2name(int index, char *name)
545 {
546 memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN),
547 CPU_NAME_LEN);
548 name[CPU_NAME_LEN] = 0;
549 strim(name);
550 return 0;
551 }
552
553 struct dbfs_d204_hdr {
554 u64 len; /* Length of d204 buffer without header */
555 u16 version; /* Version of header */
556 u8 sc; /* Used subcode */
557 char reserved[53];
558 } __attribute__ ((packed));
559
560 struct dbfs_d204 {
561 struct dbfs_d204_hdr hdr; /* 64 byte header */
562 char buf[]; /* d204 buffer */
563 } __attribute__ ((packed));
564
565 static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
566 {
567 struct dbfs_d204 *d204;
568 int rc, buf_size;
569 void *base;
570
571 buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
572 base = vzalloc(buf_size);
573 if (!base)
574 return -ENOMEM;
575 d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr);
576 rc = diag204_do_store(d204->buf, diag204_buf_pages);
577 if (rc) {
578 vfree(base);
579 return rc;
580 }
581 d204->hdr.version = DBFS_D204_HDR_VERSION;
582 d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
583 d204->hdr.sc = diag204_store_sc;
584 *data = d204;
585 *data_free_ptr = base;
586 *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr);
587 return 0;
588 }
589
590 static struct hypfs_dbfs_file dbfs_file_d204 = {
591 .name = "diag_204",
592 .data_create = dbfs_d204_create,
593 .data_free = vfree,
594 };
595
596 __init int hypfs_diag_init(void)
597 {
598 int rc;
599
600 if (diag204_probe()) {
601 pr_err("The hardware system does not support hypfs\n");
602 return -ENODATA;
603 }
604 if (diag204_info_type == INFO_EXT) {
605 rc = hypfs_dbfs_create_file(&dbfs_file_d204);
606 if (rc)
607 return rc;
608 }
609 if (MACHINE_IS_LPAR) {
610 rc = diag224_get_name_table();
611 if (rc) {
612 pr_err("The hardware system does not provide all "
613 "functions required by hypfs\n");
614 debugfs_remove(dbfs_d204_file);
615 return rc;
616 }
617 }
618 return 0;
619 }
620
621 void hypfs_diag_exit(void)
622 {
623 debugfs_remove(dbfs_d204_file);
624 diag224_delete_name_table();
625 diag204_free_buffer();
626 hypfs_dbfs_remove_file(&dbfs_file_d204);
627 }
628
629 /*
630 * Functions to create the directory structure
631 * *******************************************
632 */
633
634 static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
635 {
636 struct dentry *cpu_dir;
637 char buffer[TMP_SIZE];
638 void *rc;
639
640 snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
641 cpu_info));
642 cpu_dir = hypfs_mkdir(cpus_dir, buffer);
643 rc = hypfs_create_u64(cpu_dir, "mgmtime",
644 cpu_info__acc_time(diag204_info_type, cpu_info) -
645 cpu_info__lp_time(diag204_info_type, cpu_info));
646 if (IS_ERR(rc))
647 return PTR_ERR(rc);
648 rc = hypfs_create_u64(cpu_dir, "cputime",
649 cpu_info__lp_time(diag204_info_type, cpu_info));
650 if (IS_ERR(rc))
651 return PTR_ERR(rc);
652 if (diag204_info_type == INFO_EXT) {
653 rc = hypfs_create_u64(cpu_dir, "onlinetime",
654 cpu_info__online_time(diag204_info_type,
655 cpu_info));
656 if (IS_ERR(rc))
657 return PTR_ERR(rc);
658 }
659 diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
660 rc = hypfs_create_str(cpu_dir, "type", buffer);
661 return PTR_RET(rc);
662 }
663
664 static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr)
665 {
666 struct dentry *cpus_dir;
667 struct dentry *lpar_dir;
668 char lpar_name[LPAR_NAME_LEN + 1];
669 void *cpu_info;
670 int i;
671
672 part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
673 lpar_name[LPAR_NAME_LEN] = 0;
674 lpar_dir = hypfs_mkdir(systems_dir, lpar_name);
675 if (IS_ERR(lpar_dir))
676 return lpar_dir;
677 cpus_dir = hypfs_mkdir(lpar_dir, "cpus");
678 if (IS_ERR(cpus_dir))
679 return cpus_dir;
680 cpu_info = part_hdr + part_hdr__size(diag204_info_type);
681 for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
682 int rc;
683 rc = hypfs_create_cpu_files(cpus_dir, cpu_info);
684 if (rc)
685 return ERR_PTR(rc);
686 cpu_info += cpu_info__size(diag204_info_type);
687 }
688 return cpu_info;
689 }
690
691 static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info)
692 {
693 struct dentry *cpu_dir;
694 char buffer[TMP_SIZE];
695 void *rc;
696
697 snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
698 cpu_info));
699 cpu_dir = hypfs_mkdir(cpus_dir, buffer);
700 if (IS_ERR(cpu_dir))
701 return PTR_ERR(cpu_dir);
702 rc = hypfs_create_u64(cpu_dir, "mgmtime",
703 phys_cpu__mgm_time(diag204_info_type, cpu_info));
704 if (IS_ERR(rc))
705 return PTR_ERR(rc);
706 diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
707 rc = hypfs_create_str(cpu_dir, "type", buffer);
708 return PTR_RET(rc);
709 }
710
711 static void *hypfs_create_phys_files(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(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(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 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(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(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(root, part_hdr);
758 if (IS_ERR(ptr)) {
759 rc = PTR_ERR(ptr);
760 goto err_out;
761 }
762 }
763 hyp_dir = hypfs_mkdir(root, "hyp");
764 if (IS_ERR(hyp_dir)) {
765 rc = PTR_ERR(hyp_dir);
766 goto err_out;
767 }
768 ptr = hypfs_create_str(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 }
Linux kernel - Deliverables
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