summaryrefslogtreecommitdiffstats
path: root/fs/orangefs/orangefs-utils.c
blob: 2d129b5886eeb7a61d067502900dca75cf525d08 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
/*
 * (C) 2001 Clemson University and The University of Chicago
 *
 * See COPYING in top-level directory.
 */
#include "protocol.h"
#include "orangefs-kernel.h"
#include "orangefs-dev-proto.h"
#include "orangefs-bufmap.h"

__s32 fsid_of_op(struct orangefs_kernel_op_s *op)
{
	__s32 fsid = ORANGEFS_FS_ID_NULL;

	if (op) {
		switch (op->upcall.type) {
		case ORANGEFS_VFS_OP_FILE_IO:
			fsid = op->upcall.req.io.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_LOOKUP:
			fsid = op->upcall.req.lookup.parent_refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_CREATE:
			fsid = op->upcall.req.create.parent_refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_GETATTR:
			fsid = op->upcall.req.getattr.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_REMOVE:
			fsid = op->upcall.req.remove.parent_refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_MKDIR:
			fsid = op->upcall.req.mkdir.parent_refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_READDIR:
			fsid = op->upcall.req.readdir.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_SETATTR:
			fsid = op->upcall.req.setattr.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_SYMLINK:
			fsid = op->upcall.req.sym.parent_refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_RENAME:
			fsid = op->upcall.req.rename.old_parent_refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_STATFS:
			fsid = op->upcall.req.statfs.fs_id;
			break;
		case ORANGEFS_VFS_OP_TRUNCATE:
			fsid = op->upcall.req.truncate.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_MMAP_RA_FLUSH:
			fsid = op->upcall.req.ra_cache_flush.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_FS_UMOUNT:
			fsid = op->upcall.req.fs_umount.fs_id;
			break;
		case ORANGEFS_VFS_OP_GETXATTR:
			fsid = op->upcall.req.getxattr.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_SETXATTR:
			fsid = op->upcall.req.setxattr.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_LISTXATTR:
			fsid = op->upcall.req.listxattr.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_REMOVEXATTR:
			fsid = op->upcall.req.removexattr.refn.fs_id;
			break;
		case ORANGEFS_VFS_OP_FSYNC:
			fsid = op->upcall.req.fsync.refn.fs_id;
			break;
		default:
			break;
		}
	}
	return fsid;
}

static int orangefs_inode_flags(struct ORANGEFS_sys_attr_s *attrs)
{
	int flags = 0;
	if (attrs->flags & ORANGEFS_IMMUTABLE_FL)
		flags |= S_IMMUTABLE;
	else
		flags &= ~S_IMMUTABLE;
	if (attrs->flags & ORANGEFS_APPEND_FL)
		flags |= S_APPEND;
	else
		flags &= ~S_APPEND;
	if (attrs->flags & ORANGEFS_NOATIME_FL)
		flags |= S_NOATIME;
	else
		flags &= ~S_NOATIME;
	return flags;
}

static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs)
{
	int perm_mode = 0;

	if (attrs->perms & ORANGEFS_O_EXECUTE)
		perm_mode |= S_IXOTH;
	if (attrs->perms & ORANGEFS_O_WRITE)
		perm_mode |= S_IWOTH;
	if (attrs->perms & ORANGEFS_O_READ)
		perm_mode |= S_IROTH;

	if (attrs->perms & ORANGEFS_G_EXECUTE)
		perm_mode |= S_IXGRP;
	if (attrs->perms & ORANGEFS_G_WRITE)
		perm_mode |= S_IWGRP;
	if (attrs->perms & ORANGEFS_G_READ)
		perm_mode |= S_IRGRP;

	if (attrs->perms & ORANGEFS_U_EXECUTE)
		perm_mode |= S_IXUSR;
	if (attrs->perms & ORANGEFS_U_WRITE)
		perm_mode |= S_IWUSR;
	if (attrs->perms & ORANGEFS_U_READ)
		perm_mode |= S_IRUSR;

	if (attrs->perms & ORANGEFS_G_SGID)
		perm_mode |= S_ISGID;
	if (attrs->perms & ORANGEFS_U_SUID)
		perm_mode |= S_ISUID;

	return perm_mode;
}

/*
 * NOTE: in kernel land, we never use the sys_attr->link_target for
 * anything, so don't bother copying it into the sys_attr object here.
 */
static inline int copy_attributes_from_inode(struct inode *inode,
					     struct ORANGEFS_sys_attr_s *attrs,
					     struct iattr *iattr)
{
	umode_t tmp_mode;

	if (!iattr || !inode || !attrs) {
		gossip_err("NULL iattr (%p), inode (%p), attrs (%p) "
			   "in copy_attributes_from_inode!\n",
			   iattr,
			   inode,
			   attrs);
		return -EINVAL;
	}
	/*
	 * We need to be careful to only copy the attributes out of the
	 * iattr object that we know are valid.
	 */
	attrs->mask = 0;
	if (iattr->ia_valid & ATTR_UID) {
		attrs->owner = from_kuid(current_user_ns(), iattr->ia_uid);
		attrs->mask |= ORANGEFS_ATTR_SYS_UID;
		gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
	}
	if (iattr->ia_valid & ATTR_GID) {
		attrs->group = from_kgid(current_user_ns(), iattr->ia_gid);
		attrs->mask |= ORANGEFS_ATTR_SYS_GID;
		gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
	}

	if (iattr->ia_valid & ATTR_ATIME) {
		attrs->mask |= ORANGEFS_ATTR_SYS_ATIME;
		if (iattr->ia_valid & ATTR_ATIME_SET) {
			attrs->atime = (time64_t)iattr->ia_atime.tv_sec;
			attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET;
		}
	}
	if (iattr->ia_valid & ATTR_MTIME) {
		attrs->mask |= ORANGEFS_ATTR_SYS_MTIME;
		if (iattr->ia_valid & ATTR_MTIME_SET) {
			attrs->mtime = (time64_t)iattr->ia_mtime.tv_sec;
			attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET;
		}
	}
	if (iattr->ia_valid & ATTR_CTIME)
		attrs->mask |= ORANGEFS_ATTR_SYS_CTIME;

	/*
	 * ORANGEFS cannot set size with a setattr operation.  Probably not likely
	 * to be requested through the VFS, but just in case, don't worry about
	 * ATTR_SIZE
	 */

	if (iattr->ia_valid & ATTR_MODE) {
		tmp_mode = iattr->ia_mode;
		if (tmp_mode & (S_ISVTX)) {
			if (is_root_handle(inode)) {
				/*
				 * allow sticky bit to be set on root (since
				 * it shows up that way by default anyhow),
				 * but don't show it to the server
				 */
				tmp_mode -= S_ISVTX;
			} else {
				gossip_debug(GOSSIP_UTILS_DEBUG,
					     "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
				return -EINVAL;
			}
		}

		if (tmp_mode & (S_ISUID)) {
			gossip_debug(GOSSIP_UTILS_DEBUG,
				     "Attempting to set setuid bit (not supported); returning EINVAL.\n");
			return -EINVAL;
		}

		attrs->perms = ORANGEFS_util_translate_mode(tmp_mode);
		attrs->mask |= ORANGEFS_ATTR_SYS_PERM;
	}

	return 0;
}

static int orangefs_inode_type(enum orangefs_ds_type objtype)
{
	if (objtype == ORANGEFS_TYPE_METAFILE)
		return S_IFREG;
	else if (objtype == ORANGEFS_TYPE_DIRECTORY)
		return S_IFDIR;
	else if (objtype == ORANGEFS_TYPE_SYMLINK)
		return S_IFLNK;
	else
		return -1;
}

static int orangefs_inode_is_stale(struct inode *inode, int new,
    struct ORANGEFS_sys_attr_s *attrs, char *link_target)
{
	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
	int type = orangefs_inode_type(attrs->objtype);
	if (!new) {
		/*
		 * If the inode type or symlink target have changed then this
		 * inode is stale.
		 */
		if (type == -1 || !(inode->i_mode & type)) {
			orangefs_make_bad_inode(inode);
			return 1;
		}
		if (type == S_IFLNK && strncmp(orangefs_inode->link_target,
		    link_target, ORANGEFS_NAME_MAX)) {
			orangefs_make_bad_inode(inode);
			return 1;
		}
	}
	return 0;
}

int orangefs_inode_getattr(struct inode *inode, int new, int size)
{
	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
	struct orangefs_kernel_op_s *new_op;
	loff_t inode_size, rounded_up_size;
	int ret, type;

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
	    get_khandle_from_ino(inode));

	new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
	if (!new_op)
		return -ENOMEM;
	new_op->upcall.req.getattr.refn = orangefs_inode->refn;
	new_op->upcall.req.getattr.mask = size ?
	    ORANGEFS_ATTR_SYS_ALL_NOHINT : ORANGEFS_ATTR_SYS_ALL_NOHINT_NOSIZE;

	ret = service_operation(new_op, __func__,
	    get_interruptible_flag(inode));
	if (ret != 0)
		goto out;

	type = orangefs_inode_type(new_op->
	    downcall.resp.getattr.attributes.objtype);
	ret = orangefs_inode_is_stale(inode, new,
	    &new_op->downcall.resp.getattr.attributes,
	    new_op->downcall.resp.getattr.link_target);
	if (ret) {
		ret = -ESTALE;
		goto out;
	}

	switch (type) {
	case S_IFREG:
		inode->i_flags = orangefs_inode_flags(&new_op->
		    downcall.resp.getattr.attributes);
		if (size) {
			inode_size = (loff_t)new_op->
			    downcall.resp.getattr.attributes.size;
			rounded_up_size =
			    (inode_size + (4096 - (inode_size % 4096)));
			inode->i_size = inode_size;
			orangefs_inode->blksize =
			    new_op->downcall.resp.getattr.attributes.blksize;
			spin_lock(&inode->i_lock);
			inode->i_bytes = inode_size;
			inode->i_blocks =
			    (unsigned long)(rounded_up_size / 512);
			spin_unlock(&inode->i_lock);
		}
		break;
	case S_IFDIR:
		inode->i_size = PAGE_SIZE;
		orangefs_inode->blksize = (1 << inode->i_blkbits);
		spin_lock(&inode->i_lock);
		inode_set_bytes(inode, inode->i_size);
		spin_unlock(&inode->i_lock);
		set_nlink(inode, 1);
		break;
	case S_IFLNK:
		if (new) {
			inode->i_size = (loff_t)strlen(new_op->
			    downcall.resp.getattr.link_target);
			orangefs_inode->blksize = (1 << inode->i_blkbits);
			ret = strscpy(orangefs_inode->link_target,
			    new_op->downcall.resp.getattr.link_target,
			    ORANGEFS_NAME_MAX);
			if (ret == -E2BIG) {
				ret = -EIO;
				goto out;
			}
			inode->i_link = orangefs_inode->link_target;
		}
		break;
	}

	inode->i_uid = make_kuid(&init_user_ns, new_op->
	    downcall.resp.getattr.attributes.owner);
	inode->i_gid = make_kgid(&init_user_ns, new_op->
	    downcall.resp.getattr.attributes.group);
	inode->i_atime.tv_sec = (time64_t)new_op->
	    downcall.resp.getattr.attributes.atime;
	inode->i_mtime.tv_sec = (time64_t)new_op->
	    downcall.resp.getattr.attributes.mtime;
	inode->i_ctime.tv_sec = (time64_t)new_op->
	    downcall.resp.getattr.attributes.ctime;
	inode->i_atime.tv_nsec = 0;
	inode->i_mtime.tv_nsec = 0;
	inode->i_ctime.tv_nsec = 0;

	/* special case: mark the root inode as sticky */
	inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) |
	    orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes);

	ret = 0;
out:
	op_release(new_op);
	return ret;
}

int orangefs_inode_check_changed(struct inode *inode)
{
	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
	struct orangefs_kernel_op_s *new_op;
	int ret;

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
	    get_khandle_from_ino(inode));

	new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
	if (!new_op)
		return -ENOMEM;
	new_op->upcall.req.getattr.refn = orangefs_inode->refn;
	new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE |
	    ORANGEFS_ATTR_SYS_LNK_TARGET;

	ret = service_operation(new_op, __func__,
	    get_interruptible_flag(inode));
	if (ret != 0)
		goto out;

	ret = orangefs_inode_is_stale(inode, 0,
	    &new_op->downcall.resp.getattr.attributes,
	    new_op->downcall.resp.getattr.link_target);
out:
	op_release(new_op);
	return ret;
}

/*
 * issues a orangefs setattr request to make sure the new attribute values
 * take effect if successful.  returns 0 on success; -errno otherwise
 */
int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr)
{
	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
	struct orangefs_kernel_op_s *new_op;
	int ret;

	new_op = op_alloc(ORANGEFS_VFS_OP_SETATTR);
	if (!new_op)
		return -ENOMEM;

	new_op->upcall.req.setattr.refn = orangefs_inode->refn;
	ret = copy_attributes_from_inode(inode,
		       &new_op->upcall.req.setattr.attributes,
		       iattr);
	if (ret >= 0) {
		ret = service_operation(new_op, __func__,
				get_interruptible_flag(inode));

		gossip_debug(GOSSIP_UTILS_DEBUG,
			     "orangefs_inode_setattr: returning %d\n",
			     ret);
	}

	op_release(new_op);

	/*
	 * successful setattr should clear the atime, mtime and
	 * ctime flags.
	 */
	if (ret == 0) {
		ClearAtimeFlag(orangefs_inode);
		ClearMtimeFlag(orangefs_inode);
		ClearCtimeFlag(orangefs_inode);
		ClearModeFlag(orangefs_inode);
	}

	return ret;
}

int orangefs_flush_inode(struct inode *inode)
{
	/*
	 * If it is a dirty inode, this function gets called.
	 * Gather all the information that needs to be setattr'ed
	 * Right now, this will only be used for mode, atime, mtime
	 * and/or ctime.
	 */
	struct iattr wbattr;
	int ret;
	int mtime_flag;
	int ctime_flag;
	int atime_flag;
	int mode_flag;
	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);

	memset(&wbattr, 0, sizeof(wbattr));

	/*
	 * check inode flags up front, and clear them if they are set.  This
	 * will prevent multiple processes from all trying to flush the same
	 * inode if they call close() simultaneously
	 */
	mtime_flag = MtimeFlag(orangefs_inode);
	ClearMtimeFlag(orangefs_inode);
	ctime_flag = CtimeFlag(orangefs_inode);
	ClearCtimeFlag(orangefs_inode);
	atime_flag = AtimeFlag(orangefs_inode);
	ClearAtimeFlag(orangefs_inode);
	mode_flag = ModeFlag(orangefs_inode);
	ClearModeFlag(orangefs_inode);

	/*  -- Lazy atime,mtime and ctime update --
	 * Note: all times are dictated by server in the new scheme
	 * and not by the clients
	 *
	 * Also mode updates are being handled now..
	 */

	if (mtime_flag)
		wbattr.ia_valid |= ATTR_MTIME;
	if (ctime_flag)
		wbattr.ia_valid |= ATTR_CTIME;
	if (atime_flag)
		wbattr.ia_valid |= ATTR_ATIME;

	if (mode_flag) {
		wbattr.ia_mode = inode->i_mode;
		wbattr.ia_valid |= ATTR_MODE;
	}

	gossip_debug(GOSSIP_UTILS_DEBUG,
		     "*********** orangefs_flush_inode: %pU "
		     "(ia_valid %d)\n",
		     get_khandle_from_ino(inode),
		     wbattr.ia_valid);
	if (wbattr.ia_valid == 0) {
		gossip_debug(GOSSIP_UTILS_DEBUG,
			     "orangefs_flush_inode skipping setattr()\n");
		return 0;
	}

	gossip_debug(GOSSIP_UTILS_DEBUG,
		     "orangefs_flush_inode (%pU) writing mode %o\n",
		     get_khandle_from_ino(inode),
		     inode->i_mode);

	ret = orangefs_inode_setattr(inode, &wbattr);

	return ret;
}

int orangefs_unmount_sb(struct super_block *sb)
{
	int ret = -EINVAL;
	struct orangefs_kernel_op_s *new_op = NULL;

	gossip_debug(GOSSIP_UTILS_DEBUG,
		     "orangefs_unmount_sb called on sb %p\n",
		     sb);

	new_op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
	if (!new_op)
		return -ENOMEM;
	new_op->upcall.req.fs_umount.id = ORANGEFS_SB(sb)->id;
	new_op->upcall.req.fs_umount.fs_id = ORANGEFS_SB(sb)->fs_id;
	strncpy(new_op->upcall.req.fs_umount.orangefs_config_server,
		ORANGEFS_SB(sb)->devname,
		ORANGEFS_MAX_SERVER_ADDR_LEN);

	gossip_debug(GOSSIP_UTILS_DEBUG,
		     "Attempting ORANGEFS Unmount via host %s\n",
		     new_op->upcall.req.fs_umount.orangefs_config_server);

	ret = service_operation(new_op, "orangefs_fs_umount", 0);

	gossip_debug(GOSSIP_UTILS_DEBUG,
		     "orangefs_unmount: got return value of %d\n", ret);
	if (ret)
		sb = ERR_PTR(ret);
	else
		ORANGEFS_SB(sb)->mount_pending = 1;

	op_release(new_op);
	return ret;
}

void orangefs_make_bad_inode(struct inode *inode)
{
	if (is_root_handle(inode)) {
		/*
		 * if this occurs, the pvfs2-client-core was killed but we
		 * can't afford to lose the inode operations and such
		 * associated with the root handle in any case.
		 */
		gossip_debug(GOSSIP_UTILS_DEBUG,
			     "*** NOT making bad root inode %pU\n",
			     get_khandle_from_ino(inode));
	} else {
		gossip_debug(GOSSIP_UTILS_DEBUG,
			     "*** making bad inode %pU\n",
			     get_khandle_from_ino(inode));
		make_bad_inode(inode);
	}
}

/*
 * The following is a very dirty hack that is now a permanent part of the
 * ORANGEFS protocol. See protocol.h for more error definitions.
 */

/* The order matches include/orangefs-types.h in the OrangeFS source. */
static int PINT_errno_mapping[] = {
	0, EPERM, ENOENT, EINTR, EIO, ENXIO, EBADF, EAGAIN, ENOMEM,
	EFAULT, EBUSY, EEXIST, ENODEV, ENOTDIR, EISDIR, EINVAL, EMFILE,
	EFBIG, ENOSPC, EROFS, EMLINK, EPIPE, EDEADLK, ENAMETOOLONG,
	ENOLCK, ENOSYS, ENOTEMPTY, ELOOP, EWOULDBLOCK, ENOMSG, EUNATCH,
	EBADR, EDEADLOCK, ENODATA, ETIME, ENONET, EREMOTE, ECOMM,
	EPROTO, EBADMSG, EOVERFLOW, ERESTART, EMSGSIZE, EPROTOTYPE,
	ENOPROTOOPT, EPROTONOSUPPORT, EOPNOTSUPP, EADDRINUSE,
	EADDRNOTAVAIL, ENETDOWN, ENETUNREACH, ENETRESET, ENOBUFS,
	ETIMEDOUT, ECONNREFUSED, EHOSTDOWN, EHOSTUNREACH, EALREADY,
	EACCES, ECONNRESET, ERANGE
};

int orangefs_normalize_to_errno(__s32 error_code)
{
	__u32 i;

	/* Success */
	if (error_code == 0) {
		return 0;
	/*
	 * This shouldn't ever happen. If it does it should be fixed on the
	 * server.
	 */
	} else if (error_code > 0) {
		gossip_err("orangefs: error status receieved.\n");
		gossip_err("orangefs: assuming error code is inverted.\n");
		error_code = -error_code;
	}

	/*
	 * XXX: This is very bad since error codes from ORANGEFS may not be
	 * suitable for return into userspace.
	 */

	/*
	 * Convert ORANGEFS error values into errno values suitable for return
	 * from the kernel.
	 */
	if ((-error_code) & ORANGEFS_NON_ERRNO_ERROR_BIT) {
		if (((-error_code) &
		    (ORANGEFS_ERROR_NUMBER_BITS|ORANGEFS_NON_ERRNO_ERROR_BIT|
		    ORANGEFS_ERROR_BIT)) == ORANGEFS_ECANCEL) {
			/*
			 * cancellation error codes generally correspond to
			 * a timeout from the client's perspective
			 */
			error_code = -ETIMEDOUT;
		} else {
			/* assume a default error code */
			gossip_err("orangefs: warning: got error code without errno equivalent: %d.\n", error_code);
			error_code = -EINVAL;
		}

	/* Convert ORANGEFS encoded errno values into regular errno values. */
	} else if ((-error_code) & ORANGEFS_ERROR_BIT) {
		i = (-error_code) & ~(ORANGEFS_ERROR_BIT|ORANGEFS_ERROR_CLASS_BITS);
		if (i < sizeof(PINT_errno_mapping)/sizeof(*PINT_errno_mapping))
			error_code = -PINT_errno_mapping[i];
		else
			error_code = -EINVAL;

	/*
	 * Only ORANGEFS protocol error codes should ever come here. Otherwise
	 * there is a bug somewhere.
	 */
	} else {
		gossip_err("orangefs: orangefs_normalize_to_errno: got error code which is not from ORANGEFS.\n");
	}
	return error_code;
}

#define NUM_MODES 11
__s32 ORANGEFS_util_translate_mode(int mode)
{
	int ret = 0;
	int i = 0;
	static int modes[NUM_MODES] = {
		S_IXOTH, S_IWOTH, S_IROTH,
		S_IXGRP, S_IWGRP, S_IRGRP,
		S_IXUSR, S_IWUSR, S_IRUSR,
		S_ISGID, S_ISUID
	};
	static int orangefs_modes[NUM_MODES] = {
		ORANGEFS_O_EXECUTE, ORANGEFS_O_WRITE, ORANGEFS_O_READ,
		ORANGEFS_G_EXECUTE, ORANGEFS_G_WRITE, ORANGEFS_G_READ,
		ORANGEFS_U_EXECUTE, ORANGEFS_U_WRITE, ORANGEFS_U_READ,
		ORANGEFS_G_SGID, ORANGEFS_U_SUID
	};

	for (i = 0; i < NUM_MODES; i++)
		if (mode & modes[i])
			ret |= orangefs_modes[i];

	return ret;
}
#undef NUM_MODES

/*
 * After obtaining a string representation of the client's debug
 * keywords and their associated masks, this function is called to build an
 * array of these values.
 */
int orangefs_prepare_cdm_array(char *debug_array_string)
{
	int i;
	int rc = -EINVAL;
	char *cds_head = NULL;
	char *cds_delimiter = NULL;
	int keyword_len = 0;

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);

	/*
	 * figure out how many elements the cdm_array needs.
	 */
	for (i = 0; i < strlen(debug_array_string); i++)
		if (debug_array_string[i] == '\n')
			cdm_element_count++;

	if (!cdm_element_count) {
		pr_info("No elements in client debug array string!\n");
		goto out;
	}

	cdm_array =
		kzalloc(cdm_element_count * sizeof(struct client_debug_mask),
			GFP_KERNEL);
	if (!cdm_array) {
		pr_info("malloc failed for cdm_array!\n");
		rc = -ENOMEM;
		goto out;
	}

	cds_head = debug_array_string;

	for (i = 0; i < cdm_element_count; i++) {
		cds_delimiter = strchr(cds_head, '\n');
		*cds_delimiter = '\0';

		keyword_len = strcspn(cds_head, " ");

		cdm_array[i].keyword = kzalloc(keyword_len + 1, GFP_KERNEL);
		if (!cdm_array[i].keyword) {
			rc = -ENOMEM;
			goto out;
		}

		sscanf(cds_head,
		       "%s %llx %llx",
		       cdm_array[i].keyword,
		       (unsigned long long *)&(cdm_array[i].mask1),
		       (unsigned long long *)&(cdm_array[i].mask2));

		if (!strcmp(cdm_array[i].keyword, ORANGEFS_VERBOSE))
			client_verbose_index = i;

		if (!strcmp(cdm_array[i].keyword, ORANGEFS_ALL))
			client_all_index = i;

		cds_head = cds_delimiter + 1;
	}

	rc = cdm_element_count;

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: rc:%d:\n", __func__, rc);

out:

	return rc;

}

/*
 * /sys/kernel/debug/orangefs/debug-help can be catted to
 * see all the available kernel and client debug keywords.
 *
 * When the kernel boots, we have no idea what keywords the
 * client supports, nor their associated masks.
 *
 * We pass through this function once at boot and stamp a
 * boilerplate "we don't know" message for the client in the
 * debug-help file. We pass through here again when the client
 * starts and then we can fill out the debug-help file fully.
 *
 * The client might be restarted any number of times between
 * reboots, we only build the debug-help file the first time.
 */
int orangefs_prepare_debugfs_help_string(int at_boot)
{
	int rc = -EINVAL;
	int i;
	int byte_count = 0;
	char *client_title = "Client Debug Keywords:\n";
	char *kernel_title = "Kernel Debug Keywords:\n";

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);

	if (at_boot) {
		byte_count += strlen(HELP_STRING_UNINITIALIZED);
		client_title = HELP_STRING_UNINITIALIZED;
	} else {
		/*
		 * fill the client keyword/mask array and remember
		 * how many elements there were.
		 */
		cdm_element_count =
			orangefs_prepare_cdm_array(client_debug_array_string);
		if (cdm_element_count <= 0)
			goto out;

		/* Count the bytes destined for debug_help_string. */
		byte_count += strlen(client_title);

		for (i = 0; i < cdm_element_count; i++) {
			byte_count += strlen(cdm_array[i].keyword + 2);
			if (byte_count >= DEBUG_HELP_STRING_SIZE) {
				pr_info("%s: overflow 1!\n", __func__);
				goto out;
			}
		}

		gossip_debug(GOSSIP_UTILS_DEBUG,
			     "%s: cdm_element_count:%d:\n",
			     __func__,
			     cdm_element_count);
	}

	byte_count += strlen(kernel_title);
	for (i = 0; i < num_kmod_keyword_mask_map; i++) {
		byte_count +=
			strlen(s_kmod_keyword_mask_map[i].keyword + 2);
		if (byte_count >= DEBUG_HELP_STRING_SIZE) {
			pr_info("%s: overflow 2!\n", __func__);
			goto out;
		}
	}

	/* build debug_help_string. */
	debug_help_string = kzalloc(DEBUG_HELP_STRING_SIZE, GFP_KERNEL);
	if (!debug_help_string) {
		rc = -ENOMEM;
		goto out;
	}

	strcat(debug_help_string, client_title);

	if (!at_boot) {
		for (i = 0; i < cdm_element_count; i++) {
			strcat(debug_help_string, "\t");
			strcat(debug_help_string, cdm_array[i].keyword);
			strcat(debug_help_string, "\n");
		}
	}

	strcat(debug_help_string, "\n");
	strcat(debug_help_string, kernel_title);

	for (i = 0; i < num_kmod_keyword_mask_map; i++) {
		strcat(debug_help_string, "\t");
		strcat(debug_help_string, s_kmod_keyword_mask_map[i].keyword);
		strcat(debug_help_string, "\n");
	}

	rc = 0;

out:

	return rc;

}

/*
 * kernel = type 0
 * client = type 1
 */
void debug_mask_to_string(void *mask, int type)
{
	int i;
	int len = 0;
	char *debug_string;
	int element_count = 0;

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);

	if (type) {
		debug_string = client_debug_string;
		element_count = cdm_element_count;
	} else {
		debug_string = kernel_debug_string;
		element_count = num_kmod_keyword_mask_map;
	}

	memset(debug_string, 0, ORANGEFS_MAX_DEBUG_STRING_LEN);

	/*
	 * Some keywords, like "all" or "verbose", are amalgams of
	 * numerous other keywords. Make a special check for those
	 * before grinding through the whole mask only to find out
	 * later...
	 */
	if (check_amalgam_keyword(mask, type))
		goto out;

	/* Build the debug string. */
	for (i = 0; i < element_count; i++)
		if (type)
			do_c_string(mask, i);
		else
			do_k_string(mask, i);

	len = strlen(debug_string);

	if ((len) && (type))
		client_debug_string[len - 1] = '\0';
	else if (len)
		kernel_debug_string[len - 1] = '\0';
	else if (type)
		strcpy(client_debug_string, "none");
	else
		strcpy(kernel_debug_string, "none");

out:
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: string:%s:\n", __func__, debug_string);

	return;

}

void do_k_string(void *k_mask, int index)
{
	__u64 *mask = (__u64 *) k_mask;

	if (keyword_is_amalgam((char *) s_kmod_keyword_mask_map[index].keyword))
		goto out;

	if (*mask & s_kmod_keyword_mask_map[index].mask_val) {
		if ((strlen(kernel_debug_string) +
		     strlen(s_kmod_keyword_mask_map[index].keyword))
			< ORANGEFS_MAX_DEBUG_STRING_LEN - 1) {
				strcat(kernel_debug_string,
				       s_kmod_keyword_mask_map[index].keyword);
				strcat(kernel_debug_string, ",");
			} else {
				gossip_err("%s: overflow!\n", __func__);
				strcpy(kernel_debug_string, ORANGEFS_ALL);
				goto out;
			}
	}

out:

	return;
}

void do_c_string(void *c_mask, int index)
{
	struct client_debug_mask *mask = (struct client_debug_mask *) c_mask;

	if (keyword_is_amalgam(cdm_array[index].keyword))
		goto out;

	if ((mask->mask1 & cdm_array[index].mask1) ||
	    (mask->mask2 & cdm_array[index].mask2)) {
		if ((strlen(client_debug_string) +
		     strlen(cdm_array[index].keyword) + 1)
			< ORANGEFS_MAX_DEBUG_STRING_LEN - 2) {
				strcat(client_debug_string,
				       cdm_array[index].keyword);
				strcat(client_debug_string, ",");
			} else {
				gossip_err("%s: overflow!\n", __func__);
				strcpy(client_debug_string, ORANGEFS_ALL);
				goto out;
			}
	}
out:
	return;
}

int keyword_is_amalgam(char *keyword)
{
	int rc = 0;

	if ((!strcmp(keyword, ORANGEFS_ALL)) || (!strcmp(keyword, ORANGEFS_VERBOSE)))
		rc = 1;

	return rc;
}

/*
 * kernel = type 0
 * client = type 1
 *
 * return 1 if we found an amalgam.
 */
int check_amalgam_keyword(void *mask, int type)
{
	__u64 *k_mask;
	struct client_debug_mask *c_mask;
	int k_all_index = num_kmod_keyword_mask_map - 1;
	int rc = 0;

	if (type) {
		c_mask = (struct client_debug_mask *) mask;

		if ((c_mask->mask1 == cdm_array[client_all_index].mask1) &&
		    (c_mask->mask2 == cdm_array[client_all_index].mask2)) {
			strcpy(client_debug_string, ORANGEFS_ALL);
			rc = 1;
			goto out;
		}

		if ((c_mask->mask1 == cdm_array[client_verbose_index].mask1) &&
		    (c_mask->mask2 == cdm_array[client_verbose_index].mask2)) {
			strcpy(client_debug_string, ORANGEFS_VERBOSE);
			rc = 1;
			goto out;
		}

	} else {
		k_mask = (__u64 *) mask;

		if (*k_mask >= s_kmod_keyword_mask_map[k_all_index].mask_val) {
			strcpy(kernel_debug_string, ORANGEFS_ALL);
			rc = 1;
			goto out;
		}
	}

out:

	return rc;
}

/*
 * kernel = type 0
 * client = type 1
 */
void debug_string_to_mask(char *debug_string, void *mask, int type)
{
	char *unchecked_keyword;
	int i;
	char *strsep_fodder = kstrdup(debug_string, GFP_KERNEL);
	char *original_pointer;
	int element_count = 0;
	struct client_debug_mask *c_mask;
	__u64 *k_mask;

	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);

	if (type) {
		c_mask = (struct client_debug_mask *)mask;
		element_count = cdm_element_count;
	} else {
		k_mask = (__u64 *)mask;
		*k_mask = 0;
		element_count = num_kmod_keyword_mask_map;
	}

	original_pointer = strsep_fodder;
	while ((unchecked_keyword = strsep(&strsep_fodder, ",")))
		if (strlen(unchecked_keyword)) {
			for (i = 0; i < element_count; i++)
				if (type)
					do_c_mask(i,
						  unchecked_keyword,
						  &c_mask);
				else
					do_k_mask(i,
						  unchecked_keyword,
						  &k_mask);
		}

	kfree(original_pointer);
}

void do_c_mask(int i,
	       char *unchecked_keyword,
	       struct client_debug_mask **sane_mask)
{

	if (!strcmp(cdm_array[i].keyword, unchecked_keyword)) {
		(**sane_mask).mask1 = (**sane_mask).mask1 | cdm_array[i].mask1;
		(**sane_mask).mask2 = (**sane_mask).mask2 | cdm_array[i].mask2;
	}
}

void do_k_mask(int i, char *unchecked_keyword, __u64 **sane_mask)
{

	if (!strcmp(s_kmod_keyword_mask_map[i].keyword, unchecked_keyword))
		**sane_mask = (**sane_mask) |
				s_kmod_keyword_mask_map[i].mask_val;
}
OpenPOWER on IntegriCloud