Bug Summary

File:uss/uss_fs.c
Location:line 583, column 10
Description:Value stored to 'code' is never read

Annotated Source Code

1/*
2 * Copyright 2000, International Business Machines Corporation and others.
3 * All Rights Reserved.
4 *
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
8 */
9
10/*
11 * Implementation of the AFS system operations exported by the
12 * Cache Manager.
13 */
14
15/*
16 * --------------------- Required definitions ---------------------
17 */
18#include <afsconfig.h>
19#include <afs/param.h>
20
21#include <roken.h>
22
23#ifdef AFS_SUN5_ENV
24#include <sys/ioccom.h>
25#endif
26
27#include <afs/venus.h>
28#include <rx/rx.h>
29#include <afs/sys_prototypes.h>
30
31#include "uss_common.h"
32#include "uss_fs.h" /*Interface to this module */
33
34/*
35 * ---------------------- Private definitions ---------------------
36 */
37#undef USS_FS_DB
38
39
40/*
41 * ------------------------ Private globals -----------------------
42 */
43static struct ViceIoctl blob; /*Param-passing area */
44static struct ViceIoctl *blobP = &blob; /*Ptr to above */
45
46
47/*------------------------------------------------------------------------
48 * static InAFS
49 *
50 * Description:
51 * Is the given pathname in AFS?
52 *
53 * Arguments:
54 * a_path : Pathname to examine.
55 *
56 * Returns:
57 * 0 if the pathname is NOT in AFS,
58 * 1 if it is.
59 *
60 * Environment:
61 * Nothing interesting.
62 *
63 * Side Effects:
64 * As advertised.
65 *------------------------------------------------------------------------*/
66
67static int
68InAFS(char *a_path)
69{ /*InAFS */
70 afs_int32 code;
71
72 blob.in = NULL((void *)0);
73 blob.in_size = 0;
74 blob.out_size = USS_FS_MAX_SIZE2048;
75 blob.out = uss_fs_OutBuff;
76
77 code = pioctl(a_path, VIOC_FILE_CELL_NAME((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((30))))), blobP, 1);
78 if (code) {
79 if ((errno(* __error()) == EINVAL22) || (errno(* __error()) == ENOENT2))
80 return (0);
81 }
82 return (1);
83
84} /*InAFS */
85
86
87/*------------------------------------------------------------------------
88 * static ParentAndComponent
89 *
90 * Description:
91 * Calculate the parent directory of the given pathname, along
92 * with the final component.
93 *
94 * Arguments:
95 * char *a_path : Pathname to ancestorize.
96 * char *a_parentBuff : Ptr to parent buffer to use.
97 * char **a_componentPP : Ptr to the final component.
98 *
99 *
100 * Returns:
101 * Ptr to the buffer containing the parent dir name.
102 *
103 * Environment:
104 * Nothing interesting.
105 *
106 * Side Effects:
107 * As advertised.
108 *------------------------------------------------------------------------*/
109
110static char *
111ParentAndComponent(char *a_path, char *a_parentBuff, char **a_componentPP)
112{ /*ParentAndComponent */
113 char *rightSlashP;
114
115 /*
116 * Copy over the original pathname, then find the location of the
117 * rightmost slash. If there is one, we chop off the string at
118 * point. Otherwise, it is a single pathname component whose
119 * parent must be the current working directory. In this case,
120 * we cheat and return ``.''.
121 */
122 strcpy(a_parentBuff, a_path);
123 rightSlashP = (char *)strrchr(a_parentBuff, '/');
124 if (rightSlashP) {
125 *rightSlashP = 0;
126 *a_componentPP = rightSlashP + 1;
127 } else {
128 strcpy(a_parentBuff, ".");
129 *a_componentPP = a_path;
130 }
131
132 return (a_parentBuff);
133
134} /*ParentAndComponent */
135
136
137/*------------------------------------------------------------------------
138 * static CarefulPioctl
139 *
140 * Description:
141 * Execute a pioctl(), but be careful to refresh the Cache Manager's
142 * volume mapping in case we get an ENODEV the first time.
143 *
144 * Arguments:
145 * char *a_path : pioctl() pathname argument.
146 * int a_opcode : pioctl() opcode.
147 * struct ViceIoctl *a_blobP : pioctl() blob pointer.
148 * int a_sl : pioctl() symlink info.
149 *
150 * Returns:
151 * Whatever the pioctl() returned, either the after the first
152 * call if we didn't get an ENODEV, or the results of the second
153 * call if we did.
154 *
155 * Environment:
156 * Nothing interesting.
157 *
158 * Side Effects:
159 * As advertised.
160 *------------------------------------------------------------------------*/
161
162static int
163CarefulPioctl(char *a_path, int a_opcode, struct ViceIoctl *a_blobP, int a_sl)
164{ /*CarefulPioctl */
165#ifdef USS_FS_DB
166 static char rn[] = "uss_fs:CarefulPioctl";
167#endif
168 afs_int32 code;
169
170 /*
171 * Call the pioctl() the first time, return if things worked
172 * out ``normally''.
173 */
174#ifdef USS_FS_DB
175 printf("%s: First pioctl call\n", rn);
176#endif /* USS_FS_DB */
177 code = pioctl(a_path, a_opcode, a_blobP, a_sl);
178#ifdef USS_FS_DB
179 if (code)
180 printf("%s: First pioctl call fails, errno is %d\n", rn, errno(* __error()));
181#endif /* USS_FS_DB */
182 if ((code == 0) || (code && (errno(* __error()) != ENODEV19)))
183 return (code);
184
185 /*
186 * Hmm, it's possible out volume mappings are stale. Let's
187 * bring them up to date, then try again.
188 */
189#ifdef USS_FS_DB
190 printf("%s: First pioctl got a NODEV\n", rn);
191#endif /* USS_FS_DB */
192 code = uss_fs_CkBackups();
193 code = pioctl(a_path, a_opcode, a_blobP, a_sl);
194 return (code);
195
196} /*CarefulPioctl */
197
198
199/*------------------------------------------------------------------------
200 * EXPORTED uss_fs_GetACL
201 *
202 * Environment:
203 * Nothing interesting.
204 *
205 * Side Effects:
206 * As advertised.
207 *------------------------------------------------------------------------*/
208
209afs_int32
210uss_fs_GetACL(char *a_dirPath, char *a_aclBuff, afs_int32 a_aclBuffBytes)
211{ /*uss_fs_GetACL */
212#ifdef USS_FS_DB
213 static char rn[] = "uss_fs_GetACL"; /*Routine name */
214#endif
215 afs_int32 code; /*pioctl() result */
216
217 blob.in = NULL((void *)0);
218 blob.in_size = 0;
219 blob.out = a_aclBuff;
220 blob.out_size = a_aclBuffBytes;
221
222#ifdef USS_FS_DB
223 printf("%s: in 0x%x (%d bytes), out 0x%x, (%d bytes)\n", rn, blob.in,
224 blob.in_size, blob.out, blob.out_size);
225#endif /* USS_FS_DB */
226
227 code = CarefulPioctl(a_dirPath, VIOCGETAL((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((2))))), blobP, 1);
228
229#ifdef USS_FS_DB
230 if (code)
231 printf("%s: pioctl() failed, errno %d\n", rn, errno(* __error()));
232#endif /* USS_FS_DB */
233
234 return (code);
235
236} /*uss_fs_GetACL */
237
238
239/*------------------------------------------------------------------------
240 * EXPORTED uss_fs_SetACL
241 *
242 * Environment:
243 * Nothing interesting.
244 *
245 * Side Effects:
246 * As advertised.
247 *------------------------------------------------------------------------*/
248
249afs_int32
250uss_fs_SetACL(char *a_dirPath, char *a_aclBuff, afs_int32 a_aclBuffBytes)
251{ /*uss_fs_SetACL */
252#ifdef USS_FS_DB
253 static char rn[] = "uss_fs_SetACL"; /*Routine name */
254#endif
255 afs_int32 code; /*pioctl() result */
256
257 blob.in = a_aclBuff;
258 blob.in_size = a_aclBuffBytes;
259 blob.out = NULL((void *)0);
260 blob.out_size = 0;
261
262#ifdef USS_FS_DB
263 printf("%s: in 0x%x (%d bytes), out 0x%x, (%d bytes)\n", rn, blob.in,
264 blob.in_size, blob.out, blob.out_size);
265 printf("%s: ACL value for dir '%s' is '%s'\n", rn, a_dirPath, a_aclBuff);
266#endif /* USS_FS_DB */
267
268 code = CarefulPioctl(a_dirPath, VIOCSETAL((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((1))))), blobP, 1);
269
270#ifdef USS_FS_DB
271 if (code)
272 printf("%s: pioctl() failed, errno %d", rn, errno(* __error()));
273#endif /* USS_FS_DB */
274
275 return (code);
276
277} /*uss_fs_SetACL */
278
279
280/*------------------------------------------------------------------------
281 * EXPORTED uss_fs_GetVolStat
282 *
283 * Environment:
284 * Nothing interesting.
285 *
286 * Side Effects:
287 * As advertised.
288 *------------------------------------------------------------------------*/
289
290afs_int32
291uss_fs_GetVolStat(char *a_mountpoint, char *a_volStatBuff,
292 afs_int32 a_volStatBuffBytes)
293{ /*uss_fs_GetVolStat */
294#ifdef USS_FS_DB
295 static char rn[] = "uss_fs_GetVolStat"; /*Routine name */
296#endif
297 afs_int32 code; /*pioctl() result */
298
299 blob.in = NULL((void *)0);
300 blob.in_size = 0;
301 blob.out = a_volStatBuff;
302 blob.out_size = a_volStatBuffBytes;
303
304#ifdef USS_FS_DB
305 printf("%s: in 0x%x (%d bytes), out 0x%x, (%d bytes)\n", rn, blob.in,
306 blob.in_size, blob.out, blob.out_size);
307#endif /* USS_FS_DB */
308
309 code = CarefulPioctl(a_mountpoint, VIOCGETVOLSTAT((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((4))))), blobP, 1);
310
311#ifdef USS_FS_DB
312 if (code)
313 printf("%s: pioctl() failed, errno %d", rn, errno(* __error()));
314#endif /* USS_FS_DB */
315
316 return (code);
317
318} /*uss_fs_GetVolStat */
319
320
321/*------------------------------------------------------------------------
322 * EXPORTED uss_fs_SetVolStat
323 *
324 * Environment:
325 * Nothing interesting.
326 *
327 * Side Effects:
328 * As advertised.
329 *------------------------------------------------------------------------*/
330
331afs_int32
332uss_fs_SetVolStat(char *a_mountpoint, char *a_volStatBuff,
333 afs_int32 a_volStatBuffBytes)
334{ /*uss_fs_SetVolStat */
335#ifdef USS_FS_DB
336 static char rn[] = "uss_fs_SetVolStat"; /*Routine name */
337#endif
338 afs_int32 code; /*pioctl() result */
339
340 blob.in = a_volStatBuff;
341 blob.in_size = a_volStatBuffBytes;
342 blob.out = a_volStatBuff;
343 blob.out_size = USS_FS_MAX_SIZE2048;
344
345#ifdef USS_FS_DB
346 printf("%s: in 0x%x (%d bytes), out 0x%x, (%d bytes)\n", rn, blob.in,
347 blob.in_size, blob.out, blob.out_size);
348#endif /* USS_FS_DB */
349
350 code = CarefulPioctl(a_mountpoint, VIOCSETVOLSTAT((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((5))))), blobP, 1);
351
352#ifdef USS_FS_DB
353 if (code)
354 printf("%s: pioctl() failed, errno %d", rn, errno(* __error()));
355#endif /* USS_FS_DB */
356
357 return (code);
358
359} /*uss_fs_SetVolStat */
360
361
362/*------------------------------------------------------------------------
363 * EXPORTED uss_fs_CkBackups
364 *
365 * Environment:
366 * We are NOT careful here, since it's OK to get ENODEVs.
367 *
368 * Side Effects:
369 * As advertised.
370 *------------------------------------------------------------------------*/
371
372afs_int32
373uss_fs_CkBackups(void)
374{ /*uss_fs_CkBackups */
375#ifdef USS_FS_DB
376 static char rn[] = "uss_fs_CkBackups"; /*Routine name */
377#endif
378 afs_int32 code; /*pioctl() result */
379
380 blob.in = NULL((void *)0);
381 blob.in_size = 0;
382 blob.out = NULL((void *)0);
383 blob.out_size = 0;
384
385#ifdef USS_FS_DB
386 printf("%s: in 0x%x (%d bytes), out 0x%x, (%d bytes)\n", rn, blob.in,
387 blob.in_size, blob.out, blob.out_size);
388#endif /* USS_FS_DB */
389
390 code = pioctl(NULL((void *)0), /*No pathname needed here */
391 VIOCCKBACK((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((11))))), /*CheckBackups */
392 &blob, /*Params */
393 1); /*Symlink disposition */
394#ifdef USS_FS_DB
395 if (code)
396 printf("%s: pioctl() failed, errno %d", rn, errno(* __error()));
397#endif /* USS_FS_DB */
398
399 return (code);
400
401} /*uss_fs_CkBackups */
402
403
404/*------------------------------------------------------------------------
405 * EXPORTED uss_fs_MkMountPoint
406 *
407 * Environment:
408 * Uses uss_fs_OutBuff to construct the mountpoint contents.
409 *
410 * Side Effects:
411 * As advertised.
412 *------------------------------------------------------------------------*/
413
414afs_int32
415uss_fs_MkMountPoint(char *a_volname, char *a_cellname, afs_int32 a_rw,
416 char *a_mountpoint)
417{ /*uss_fs_MkMountPoint */
418 extern int local_Cell;
419 static char rn[] = "uss_fs_MkMountPoint"; /*Routine name */
420 afs_int32 code; /*pioctl() result */
421 char *tp; /*Temporary */
422
423#ifdef USS_FS_DB
424 printf
425 ("%s: a_volname='%s', a_cellname='%s', a_rw=%d, a_mountpoint='%s'\n",
426 rn, a_volname, a_cellname, a_rw, a_mountpoint);
427#endif /* USS_FS_DB */
428
429 /*
430 * Make sure the parent directory is in AFS.
431 */
432 if (!InAFS(ParentAndComponent(a_mountpoint, uss_fs_OutBuff, &tp))) {
433 printf("%s: Mountpoints must be created within AFS\n", rn);
434 return (-1);
435 }
436
437 /*
438 * Build the contents of the mountpoint we'll create. It's safe to
439 * use the uss_fs_OutBuff for this construction. Note: the last
440 * char, by convention, is a dot.
441 */
442 if (local_Cell) {
443 sprintf(uss_fs_OutBuff, "%s%s.", (a_rw ? "%" : "#"), a_volname);
444 } else {
445 sprintf(uss_fs_OutBuff, "%s%s:%s.", (a_rw ? "%" : "#"), a_cellname,
446 a_volname);
447 }
448
449 /*
450 * Now, create the symlink with the above value.
451 */
452 code = symlink(uss_fs_OutBuff, a_mountpoint);
453 if (code) {
454#ifdef USS_FS_DB
455 printf("%s: Mountpoint creation (symlink) failed, errno is %d\n", rn,
456 errno(* __error()));
457#endif /* USS_FS_DB */
458 return (-1);
459 }
460 return 0;
461} /*uss_fs_MkMountPoint */
462
463
464/*------------------------------------------------------------------------
465 * EXPORTED uss_fs_RmMountPoint
466 *
467 * Environment:
468 * Nothing interesting.
469 *
470 * Side Effects:
471 * As advertised.
472 *------------------------------------------------------------------------*/
473
474afs_int32
475uss_fs_RmMountPoint(char *a_mountpoint)
476{ /*uss_fs_RmMountPoint */
477 static char rn[] = "uss_fs_RmMountPoint"; /*Routine name */
478 afs_int32 code; /*pioctl() result */
479 char *parentDirP; /*Ptr to parent */
480 char *componentP; /*Ptr to last component */
481
482 /*
483 * Get the parent & final component names.
484 */
485 parentDirP = ParentAndComponent(a_mountpoint, uss_fs_InBuff, &componentP);
486
487 blob.in = componentP;
488 blob.in_size = strlen(componentP) + 1;
489 blob.out = uss_fs_OutBuff;
490 blob.out_size = USS_FS_MAX_SIZE2048;
491
492#ifdef USS_FS_DB
493 printf("%s: AFS_STAT_MT_PT, in 0x%x (%d bytes), out 0x%x, (%d bytes)\n",
494 rn, blob.in, blob.in_size, blob.out, blob.out_size);
495#endif /* USS_FS_DB */
496
497 code = CarefulPioctl(parentDirP, VIOC_AFS_STAT_MT_PT((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((29))))), blobP, 1);
498 if (code) {
499#ifdef USS_FS_DB
500 printf("%s: STAT_MT_PT pioctl() failed, errno %d", rn, errno(* __error()));
501#endif /* USS_FS_DB */
502 if (errno(* __error()) == EINVAL22)
503 printf("%s: '%s' is not a mountpoint\n", rn, a_mountpoint);
504 return (code);
505 }
506
507 /*
508 * Now that we know we have a proper mountpoint, nuke it.
509 */
510 blob.in = componentP;
511 blob.in_size = strlen(componentP) + 1;
512 blob.out = NULL((void *)0);
513 blob.out_size = 0;
514
515 if (!uss_DryRun) {
516#ifdef USS_FS_DB
517 printf
518 ("%s: AFS_DELETE_MT_PT, in 0x%x (%d bytes), out 0x%x, (%d bytes)\n",
519 rn, blob.in, blob.in_size, blob.out, blob.out_size);
520#endif /* USS_FS_DB */
521
522 code = pioctl(parentDirP, VIOC_AFS_DELETE_MT_PT((unsigned int) ((unsigned long) ((0x80000000) | (((sizeof(struct
ViceIoctl)) & ((1 << 13) - 1)) << 16) | ((('V'
)) << 8) | ((28))))), blobP, 1);
523 if (code) {
524#ifdef USS_FS_DB
525 printf("%s: DELETE_MT_PT pioctl() failed, errno %d", rn, errno(* __error()));
526#endif /* USS_FS_DB */
527 }
528 } else
529 printf("\t[Dry run - mount point '%s' NOT removed]\n", componentP);
530
531 return (code);
532
533} /*uss_fs_RmMountPoint */
534
535
536#include <afs/auth.h>
537struct tokenInfo {
538 struct ktc_token token;
539 struct ktc_principal service;
540 struct ktc_principal client;
541 int deleted;
542};
543
544/*
545 * Build a list of tokens, delete the bad ones (the ones to remove from the
546 * permissions list,) destroy all tokens, and then re-register the good ones.
547 * Ugly, but it works.
548 */
549int
550uss_fs_UnlogToken(char *celln)
551{
552 int count = 0, index, index2;
553 afs_int32 code = 0, cnt = 0;
554 struct ktc_principal serviceName;
555 struct tokenInfo *tokenInfoP, *tp;
556
557 do {
558 code = ktc_ListTokens(count, &count, &serviceName);
559 cnt++;
560 } while (!code);
561 count = cnt - 1;
562 tokenInfoP =
563 (struct tokenInfo *)malloc((sizeof(struct tokenInfo) * count));
564 for (code = index = index2 = 0; (!code) && (index < count); index++) {
565 tp = tokenInfoP + index;
566 code = ktc_ListTokens(index2, &index2, &tp->service);
567 if (!code) {
568 code =
569 ktc_GetToken(&tp->service, &tp->token,
570 sizeof(struct ktc_token), &tp->client);
571 if (!code) {
572 tp->deleted = (!strcmp(celln, tp->client.cell) ? 1 : 0);
573 if (tp->deleted)
574 cnt = 1;
575 }
576 }
577 }
578 if ((code = ktc_ForgetAllTokens())) {
579 printf("uss_fs_UnlogToken: could not discard tickets, code %d\n",
580 code);
581 exit(1);
582 }
583 for (code = index = 0; index < count; index++) {
Value stored to 'code' is never read
584 tp = tokenInfoP + index;
585 if (!(tp->deleted)) {
586 code = ktc_SetToken(&tp->service, &tp->token, &tp->client, 0);
587 if (code) {
588 printf
589 ("uss_fs_UnlogToken: Couldn't re-register token, code = %d\n",
590 code);
591 }
592 }
593 }
594 return 0;
595}