Commit | Line | Data |
---|---|---|
6548fca4 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
6548fca4 | 3 | * |
c0c0989a MJ |
4 | * Copyright (C) 2016 Aravind HT <aravind.ht@gmail.com> |
5 | * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6548fca4 MD |
6 | */ |
7 | ||
6548fca4 MD |
8 | #include <limits.h> |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | #include <sys/types.h> | |
13 | #include <unistd.h> | |
14 | #include <assert.h> | |
15 | #include <errno.h> | |
16 | #include <fcntl.h> | |
17 | #include <sys/select.h> | |
18 | #include <sys/resource.h> | |
19 | #include <sys/time.h> | |
20 | #include <fcntl.h> | |
21 | #include <pthread.h> | |
96a6162e MD |
22 | #include <signal.h> |
23 | #include <stdbool.h> | |
aaa692c8 | 24 | #include <dlfcn.h> |
6548fca4 MD |
25 | #include <urcu/compiler.h> |
26 | #include <urcu/tls-compat.h> | |
7d34f27d | 27 | #include <urcu/system.h> |
6548fca4 | 28 | |
9d315d6d MJ |
29 | #include "common/ust-fd.h" |
30 | #include "common/macros.h" | |
6548fca4 | 31 | #include <lttng/ust-error.h> |
59e57035 | 32 | #include <lttng/ust-cancelstate.h> |
9d315d6d | 33 | #include "common/logging.h" |
6548fca4 | 34 | |
fca97dfd MJ |
35 | #include "lib/lttng-ust-common/fd-tracker.h" |
36 | ||
6548fca4 MD |
37 | /* Operations on the fd set. */ |
38 | #define IS_FD_VALID(fd) ((fd) >= 0 && (fd) < lttng_ust_max_fd) | |
39 | #define GET_FD_SET_FOR_FD(fd, fd_sets) (&((fd_sets)[(fd) / FD_SETSIZE])) | |
40 | #define CALC_INDEX_TO_SET(fd) ((fd) % FD_SETSIZE) | |
f5c453e9 | 41 | #define IS_FD_STD(fd) (IS_FD_VALID(fd) && (fd) <= STDERR_FILENO) |
6548fca4 MD |
42 | |
43 | /* Check fd validity before calling these. */ | |
44 | #define ADD_FD_TO_SET(fd, fd_sets) \ | |
45 | FD_SET(CALC_INDEX_TO_SET(fd), GET_FD_SET_FOR_FD(fd, fd_sets)) | |
46 | #define IS_FD_SET(fd, fd_sets) \ | |
47 | FD_ISSET(CALC_INDEX_TO_SET(fd), GET_FD_SET_FOR_FD(fd, fd_sets)) | |
48 | #define DEL_FD_FROM_SET(fd, fd_sets) \ | |
49 | FD_CLR(CALC_INDEX_TO_SET(fd), GET_FD_SET_FOR_FD(fd, fd_sets)) | |
50 | ||
51 | /* | |
52 | * Protect the lttng_fd_set. Nests within the ust_lock, and therefore | |
a9fd951a | 53 | * within the libc dl lock. Therefore, we need to allocate the TLS before |
6548fca4 | 54 | * nesting into this lock. |
c1be081a MD |
55 | * |
56 | * The ust_safe_guard_fd_mutex nests within the ust_mutex. This mutex | |
57 | * is also held across fork. | |
6548fca4 MD |
58 | */ |
59 | static pthread_mutex_t ust_safe_guard_fd_mutex = PTHREAD_MUTEX_INITIALIZER; | |
283f4bec | 60 | |
6548fca4 MD |
61 | /* |
62 | * Track whether we are within lttng-ust or application, for close | |
793d29c9 MD |
63 | * system call override by LD_PRELOAD library. This also tracks whether |
64 | * we are invoking close() from a signal handler nested on an | |
65 | * application thread. | |
6548fca4 | 66 | */ |
96a6162e | 67 | static DEFINE_URCU_TLS(int, ust_fd_mutex_nest); |
6548fca4 MD |
68 | |
69 | /* fd_set used to book keep fd being used by lttng-ust. */ | |
70 | static fd_set *lttng_fd_set; | |
71 | static int lttng_ust_max_fd; | |
72 | static int num_fd_sets; | |
7d34f27d | 73 | static int init_done; |
6548fca4 MD |
74 | |
75 | /* | |
a9fd951a | 76 | * Force a read (imply TLS allocation for dlopen) of TLS variables. |
6548fca4 | 77 | */ |
a9fd951a | 78 | void lttng_ust_fd_tracker_alloc_tls(void) |
6548fca4 | 79 | { |
96a6162e | 80 | asm volatile ("" : : "m" (URCU_TLS(ust_fd_mutex_nest))); |
6548fca4 MD |
81 | } |
82 | ||
83 | /* | |
84 | * Allocate the fd set array based on the hard limit set for this | |
85 | * process. This will be called during the constructor execution | |
86 | * and will also be called in the child after fork via lttng_ust_init. | |
87 | */ | |
fca97dfd | 88 | void lttng_ust_fd_tracker_init(void) |
6548fca4 MD |
89 | { |
90 | struct rlimit rlim; | |
91 | int i; | |
92 | ||
7d34f27d MD |
93 | if (CMM_LOAD_SHARED(init_done)) |
94 | return; | |
95 | ||
6548fca4 MD |
96 | memset(&rlim, 0, sizeof(rlim)); |
97 | /* Get the current possible max number of fd for this process. */ | |
98 | if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) | |
99 | abort(); | |
100 | /* | |
101 | * FD set array size determined using the hard limit. Even if | |
102 | * the process wishes to increase its limit using setrlimit, it | |
103 | * can only do so with the softlimit which will be less than the | |
104 | * hard limit. | |
105 | */ | |
106 | lttng_ust_max_fd = rlim.rlim_max; | |
107 | num_fd_sets = lttng_ust_max_fd / FD_SETSIZE; | |
108 | if (lttng_ust_max_fd % FD_SETSIZE) | |
109 | ++num_fd_sets; | |
110 | if (lttng_fd_set != NULL) { | |
111 | free(lttng_fd_set); | |
112 | lttng_fd_set = NULL; | |
113 | } | |
114 | lttng_fd_set = malloc(num_fd_sets * (sizeof(fd_set))); | |
115 | if (!lttng_fd_set) | |
116 | abort(); | |
117 | for (i = 0; i < num_fd_sets; i++) | |
118 | FD_ZERO((<tng_fd_set[i])); | |
7d34f27d | 119 | CMM_STORE_SHARED(init_done, 1); |
6548fca4 MD |
120 | } |
121 | ||
f799b0b7 | 122 | static void lttng_ust_lock_fd_tracker_orig(void) |
6548fca4 | 123 | { |
96a6162e | 124 | sigset_t sig_all_blocked, orig_mask; |
59e57035 | 125 | int ret; |
283f4bec | 126 | |
59e57035 MD |
127 | if (lttng_ust_cancelstate_disable_push()) { |
128 | ERR("lttng_ust_cancelstate_disable_push"); | |
283f4bec | 129 | } |
96a6162e MD |
130 | sigfillset(&sig_all_blocked); |
131 | ret = pthread_sigmask(SIG_SETMASK, &sig_all_blocked, &orig_mask); | |
132 | if (ret) { | |
133 | ERR("pthread_sigmask: %s", strerror(ret)); | |
134 | } | |
135 | if (!URCU_TLS(ust_fd_mutex_nest)++) { | |
136 | /* | |
137 | * Ensure the compiler don't move the store after the close() | |
138 | * call in case close() would be marked as leaf. | |
139 | */ | |
140 | cmm_barrier(); | |
141 | pthread_mutex_lock(&ust_safe_guard_fd_mutex); | |
96a6162e MD |
142 | } |
143 | ret = pthread_sigmask(SIG_SETMASK, &orig_mask, NULL); | |
144 | if (ret) { | |
145 | ERR("pthread_sigmask: %s", strerror(ret)); | |
146 | } | |
6548fca4 MD |
147 | } |
148 | ||
f799b0b7 | 149 | static void lttng_ust_unlock_fd_tracker_orig(void) |
6548fca4 | 150 | { |
96a6162e | 151 | sigset_t sig_all_blocked, orig_mask; |
59e57035 | 152 | int ret; |
283f4bec | 153 | |
96a6162e MD |
154 | sigfillset(&sig_all_blocked); |
155 | ret = pthread_sigmask(SIG_SETMASK, &sig_all_blocked, &orig_mask); | |
156 | if (ret) { | |
157 | ERR("pthread_sigmask: %s", strerror(ret)); | |
158 | } | |
6548fca4 MD |
159 | /* |
160 | * Ensure the compiler don't move the store before the close() | |
161 | * call, in case close() would be marked as leaf. | |
162 | */ | |
163 | cmm_barrier(); | |
96a6162e | 164 | if (!--URCU_TLS(ust_fd_mutex_nest)) { |
96a6162e MD |
165 | pthread_mutex_unlock(&ust_safe_guard_fd_mutex); |
166 | } | |
167 | ret = pthread_sigmask(SIG_SETMASK, &orig_mask, NULL); | |
283f4bec | 168 | if (ret) { |
96a6162e MD |
169 | ERR("pthread_sigmask: %s", strerror(ret)); |
170 | } | |
59e57035 MD |
171 | if (lttng_ust_cancelstate_disable_pop()) { |
172 | ERR("lttng_ust_cancelstate_disable_pop"); | |
283f4bec | 173 | } |
6548fca4 MD |
174 | } |
175 | ||
f5c453e9 JR |
176 | static int dup_std_fd(int fd) |
177 | { | |
5a4d96d1 | 178 | int ret, i; |
f5c453e9 JR |
179 | int fd_to_close[STDERR_FILENO + 1]; |
180 | int fd_to_close_count = 0; | |
181 | int dup_cmd = F_DUPFD; /* Default command */ | |
182 | int fd_valid = -1; | |
183 | ||
184 | if (!(IS_FD_STD(fd))) { | |
185 | /* Should not be here */ | |
186 | ret = -1; | |
187 | goto error; | |
188 | } | |
189 | ||
190 | /* Check for FD_CLOEXEC flag */ | |
191 | ret = fcntl(fd, F_GETFD); | |
192 | if (ret < 0) { | |
193 | PERROR("fcntl on f_getfd"); | |
194 | ret = -1; | |
195 | goto error; | |
196 | } | |
197 | ||
198 | if (ret & FD_CLOEXEC) { | |
199 | dup_cmd = F_DUPFD_CLOEXEC; | |
200 | } | |
201 | ||
202 | /* Perform dup */ | |
5a4d96d1 | 203 | for (i = 0; i < STDERR_FILENO + 1; i++) { |
f5c453e9 JR |
204 | ret = fcntl(fd, dup_cmd, 0); |
205 | if (ret < 0) { | |
206 | PERROR("fcntl dup fd"); | |
207 | goto error; | |
208 | } | |
209 | ||
210 | if (!(IS_FD_STD(ret))) { | |
211 | /* fd is outside of STD range, use it. */ | |
212 | fd_valid = ret; | |
213 | /* Close fd received as argument. */ | |
214 | fd_to_close[i] = fd; | |
215 | fd_to_close_count++; | |
216 | break; | |
217 | } | |
218 | ||
219 | fd_to_close[i] = ret; | |
220 | fd_to_close_count++; | |
221 | } | |
222 | ||
223 | /* Close intermediary fds */ | |
5a4d96d1 | 224 | for (i = 0; i < fd_to_close_count; i++) { |
f5c453e9 JR |
225 | ret = close(fd_to_close[i]); |
226 | if (ret) { | |
227 | PERROR("close on temporary fd: %d.", fd_to_close[i]); | |
228 | /* | |
229 | * Not using an abort here would yield a complicated | |
230 | * error handling for the caller. If a failure occurs | |
231 | * here, the system is already in a bad state. | |
232 | */ | |
233 | abort(); | |
234 | } | |
235 | } | |
236 | ||
237 | ret = fd_valid; | |
238 | error: | |
239 | return ret; | |
240 | } | |
241 | ||
6548fca4 MD |
242 | /* |
243 | * Needs to be called with ust_safe_guard_fd_mutex held when opening the fd. | |
244 | * Has strict checking of fd validity. | |
f5c453e9 JR |
245 | * |
246 | * If fd <= 2, dup the fd until fd > 2. This enables us to bypass | |
247 | * problems that can be encountered if UST uses stdin, stdout, stderr | |
248 | * fds for internal use (daemon etc.). This can happen if the | |
249 | * application closes either of those file descriptors. Intermediary fds | |
250 | * are closed as needed. | |
251 | * | |
252 | * Return -1 on error. | |
253 | * | |
6548fca4 | 254 | */ |
f799b0b7 | 255 | static int lttng_ust_add_fd_to_tracker_orig(int fd) |
6548fca4 | 256 | { |
f5c453e9 | 257 | int ret; |
7d34f27d MD |
258 | /* |
259 | * Ensure the tracker is initialized when called from | |
260 | * constructors. | |
261 | */ | |
fca97dfd | 262 | lttng_ust_fd_tracker_init(); |
96a6162e | 263 | assert(URCU_TLS(ust_fd_mutex_nest)); |
f5c453e9 JR |
264 | |
265 | if (IS_FD_STD(fd)) { | |
266 | ret = dup_std_fd(fd); | |
267 | if (ret < 0) { | |
268 | goto error; | |
269 | } | |
270 | fd = ret; | |
271 | } | |
272 | ||
6548fca4 MD |
273 | /* Trying to add an fd which we can not accommodate. */ |
274 | assert(IS_FD_VALID(fd)); | |
275 | /* Setting an fd thats already set. */ | |
276 | assert(!IS_FD_SET(fd, lttng_fd_set)); | |
277 | ||
278 | ADD_FD_TO_SET(fd, lttng_fd_set); | |
f5c453e9 JR |
279 | return fd; |
280 | error: | |
281 | return ret; | |
6548fca4 MD |
282 | } |
283 | ||
284 | /* | |
285 | * Needs to be called with ust_safe_guard_fd_mutex held when opening the fd. | |
286 | * Has strict checking for fd validity. | |
287 | */ | |
f799b0b7 | 288 | static void lttng_ust_delete_fd_from_tracker_orig(int fd) |
6548fca4 | 289 | { |
7d34f27d MD |
290 | /* |
291 | * Ensure the tracker is initialized when called from | |
292 | * constructors. | |
293 | */ | |
fca97dfd | 294 | lttng_ust_fd_tracker_init(); |
7d34f27d | 295 | |
96a6162e | 296 | assert(URCU_TLS(ust_fd_mutex_nest)); |
6548fca4 MD |
297 | /* Not a valid fd. */ |
298 | assert(IS_FD_VALID(fd)); | |
299 | /* Deleting an fd which was not set. */ | |
300 | assert(IS_FD_SET(fd, lttng_fd_set)); | |
301 | ||
302 | DEL_FD_FROM_SET(fd, lttng_fd_set); | |
303 | } | |
304 | ||
aaa692c8 MD |
305 | #if !defined(LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS) |
306 | static int (*__lttng_ust_safe_close_fd)(int fd, int (*close_cb)(int fd)) = NULL; | |
307 | ||
308 | static | |
309 | void *_init_lttng_ust_safe_close_fd(void) | |
310 | { | |
311 | if (__lttng_ust_safe_close_fd == NULL) { | |
312 | __lttng_ust_safe_close_fd = dlsym(RTLD_DEFAULT, "lttng_ust_safe_close_fd"); | |
313 | ||
314 | if (__lttng_ust_safe_close_fd == NULL) { | |
315 | fprintf(stderr, "%s\n", dlerror()); | |
316 | } | |
317 | } | |
318 | ||
319 | return __lttng_ust_safe_close_fd; | |
320 | } | |
321 | ||
322 | static int lttng_ust_safe_close_fd_chain(int fd, int (*close_cb)(int fd)) | |
323 | { | |
324 | if (_init_lttng_ust_safe_close_fd()) { | |
325 | /* Chain on ust-2.12 preload */ | |
326 | return __lttng_ust_safe_close_fd(fd, close_cb); | |
327 | } else { | |
328 | /* Fallback to libc symbol */ | |
329 | return close_cb(fd); | |
330 | } | |
331 | } | |
332 | #endif | |
333 | ||
6548fca4 MD |
334 | /* |
335 | * Interface allowing applications to close arbitrary file descriptors. | |
336 | * We check if it is owned by lttng-ust, and return -1, errno=EBADF | |
337 | * instead of closing it if it is the case. | |
338 | */ | |
f799b0b7 | 339 | static int lttng_ust_safe_close_fd_orig(int fd, int (*close_cb)(int fd)) |
6548fca4 MD |
340 | { |
341 | int ret = 0; | |
342 | ||
a9fd951a | 343 | lttng_ust_fd_tracker_alloc_tls(); |
6548fca4 | 344 | |
7d34f27d MD |
345 | /* |
346 | * Ensure the tracker is initialized when called from | |
347 | * constructors. | |
348 | */ | |
fca97dfd | 349 | lttng_ust_fd_tracker_init(); |
7d34f27d | 350 | |
6548fca4 MD |
351 | /* |
352 | * If called from lttng-ust, we directly call close without | |
353 | * validating whether the FD is part of the tracked set. | |
354 | */ | |
aaa692c8 MD |
355 | if (URCU_TLS(ust_fd_mutex_nest)) { |
356 | #if !defined(LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS) | |
357 | return lttng_ust_safe_close_fd_chain(fd, close_cb); | |
358 | #else | |
6548fca4 | 359 | return close_cb(fd); |
aaa692c8 MD |
360 | #endif |
361 | } | |
6548fca4 MD |
362 | |
363 | lttng_ust_lock_fd_tracker(); | |
364 | if (IS_FD_VALID(fd) && IS_FD_SET(fd, lttng_fd_set)) { | |
365 | ret = -1; | |
366 | errno = EBADF; | |
367 | } else { | |
aaa692c8 MD |
368 | #if !defined(LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS) |
369 | ret = lttng_ust_safe_close_fd_chain(fd, close_cb); | |
370 | #else | |
6548fca4 | 371 | ret = close_cb(fd); |
aaa692c8 | 372 | #endif |
6548fca4 MD |
373 | } |
374 | lttng_ust_unlock_fd_tracker(); | |
375 | ||
376 | return ret; | |
377 | } | |
378 | ||
aaa692c8 MD |
379 | #if !defined(LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS) |
380 | static int (*__lttng_ust_safe_fclose_stream)(FILE *stream, int (*fclose_cb)(FILE *stream)) = NULL; | |
381 | ||
382 | static | |
383 | void *_init_lttng_ust_safe_fclose_stream(void) | |
384 | { | |
385 | if (__lttng_ust_safe_fclose_stream == NULL) { | |
386 | __lttng_ust_safe_fclose_stream = dlsym(RTLD_DEFAULT, "lttng_ust_safe_fclose_stream"); | |
387 | ||
388 | if (__lttng_ust_safe_fclose_stream == NULL) { | |
389 | fprintf(stderr, "%s\n", dlerror()); | |
390 | } | |
391 | } | |
392 | ||
393 | return __lttng_ust_safe_fclose_stream; | |
394 | } | |
395 | ||
396 | static int lttng_ust_safe_fclose_stream_chain(FILE *stream, int (*fclose_cb)(FILE *stream)) | |
397 | { | |
398 | if (_init_lttng_ust_safe_fclose_stream()) { | |
399 | /* Chain on ust-2.12 preload */ | |
400 | return __lttng_ust_safe_fclose_stream(stream, fclose_cb); | |
401 | } else { | |
402 | /* Fallback to libc symbol */ | |
403 | return fclose_cb(stream); | |
404 | } | |
405 | } | |
406 | #endif | |
407 | ||
52a20dc7 MD |
408 | /* |
409 | * Interface allowing applications to close arbitrary streams. | |
410 | * We check if it is owned by lttng-ust, and return -1, errno=EBADF | |
411 | * instead of closing it if it is the case. | |
412 | */ | |
f799b0b7 | 413 | static int lttng_ust_safe_fclose_stream_orig(FILE *stream, int (*fclose_cb)(FILE *stream)) |
52a20dc7 MD |
414 | { |
415 | int ret = 0, fd; | |
416 | ||
a9fd951a | 417 | lttng_ust_fd_tracker_alloc_tls(); |
52a20dc7 | 418 | |
7d34f27d MD |
419 | /* |
420 | * Ensure the tracker is initialized when called from | |
421 | * constructors. | |
422 | */ | |
fca97dfd | 423 | lttng_ust_fd_tracker_init(); |
7d34f27d | 424 | |
52a20dc7 MD |
425 | /* |
426 | * If called from lttng-ust, we directly call fclose without | |
427 | * validating whether the FD is part of the tracked set. | |
428 | */ | |
aaa692c8 MD |
429 | if (URCU_TLS(ust_fd_mutex_nest)) { |
430 | #if !defined(LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS) | |
431 | return lttng_ust_safe_fclose_stream_chain(stream, fclose_cb); | |
432 | #else | |
52a20dc7 | 433 | return fclose_cb(stream); |
aaa692c8 MD |
434 | #endif |
435 | } | |
52a20dc7 MD |
436 | |
437 | fd = fileno(stream); | |
438 | ||
439 | lttng_ust_lock_fd_tracker(); | |
440 | if (IS_FD_VALID(fd) && IS_FD_SET(fd, lttng_fd_set)) { | |
441 | ret = -1; | |
442 | errno = EBADF; | |
443 | } else { | |
aaa692c8 MD |
444 | #if !defined(LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS) |
445 | ret = lttng_ust_safe_fclose_stream_chain(stream, fclose_cb); | |
446 | #else | |
52a20dc7 | 447 | ret = fclose_cb(stream); |
aaa692c8 | 448 | #endif |
52a20dc7 MD |
449 | } |
450 | lttng_ust_unlock_fd_tracker(); | |
451 | ||
452 | return ret; | |
453 | } | |
454 | ||
6548fca4 MD |
455 | #ifdef __OpenBSD__ |
456 | static void set_close_success(int *p) | |
457 | { | |
458 | *p = 1; | |
459 | } | |
460 | static int test_close_success(const int *p) | |
461 | { | |
462 | return *p; | |
463 | } | |
464 | #else | |
465 | static void set_close_success(int *p __attribute__((unused))) | |
466 | { | |
467 | } | |
468 | static int test_close_success(const int *p __attribute__((unused))) | |
469 | { | |
470 | return 1; | |
471 | } | |
472 | #endif | |
473 | ||
474 | /* | |
475 | * Implement helper for closefrom() override. | |
476 | */ | |
f799b0b7 | 477 | static int lttng_ust_safe_closefrom_fd_orig(int lowfd, int (*close_cb)(int fd)) |
6548fca4 MD |
478 | { |
479 | int ret = 0, close_success = 0, i; | |
480 | ||
a9fd951a | 481 | lttng_ust_fd_tracker_alloc_tls(); |
6548fca4 | 482 | |
7d34f27d MD |
483 | /* |
484 | * Ensure the tracker is initialized when called from | |
485 | * constructors. | |
486 | */ | |
fca97dfd | 487 | lttng_ust_fd_tracker_init(); |
7d34f27d | 488 | |
6548fca4 MD |
489 | if (lowfd < 0) { |
490 | /* | |
491 | * NetBSD return EBADF if fd is invalid. | |
492 | */ | |
493 | errno = EBADF; | |
494 | ret = -1; | |
495 | goto end; | |
496 | } | |
497 | /* | |
498 | * If called from lttng-ust, we directly call close without | |
499 | * validating whether the FD is part of the tracked set. | |
500 | */ | |
793d29c9 | 501 | if (URCU_TLS(ust_fd_mutex_nest)) { |
6548fca4 MD |
502 | for (i = lowfd; i < lttng_ust_max_fd; i++) { |
503 | if (close_cb(i) < 0) { | |
504 | switch (errno) { | |
505 | case EBADF: | |
506 | continue; | |
507 | case EINTR: | |
508 | default: | |
509 | ret = -1; | |
510 | goto end; | |
511 | } | |
512 | } | |
513 | set_close_success(&close_success); | |
514 | } | |
515 | } else { | |
516 | lttng_ust_lock_fd_tracker(); | |
517 | for (i = lowfd; i < lttng_ust_max_fd; i++) { | |
518 | if (IS_FD_VALID(i) && IS_FD_SET(i, lttng_fd_set)) | |
519 | continue; | |
520 | if (close_cb(i) < 0) { | |
521 | switch (errno) { | |
522 | case EBADF: | |
523 | continue; | |
524 | case EINTR: | |
525 | default: | |
526 | ret = -1; | |
527 | lttng_ust_unlock_fd_tracker(); | |
528 | goto end; | |
529 | } | |
530 | } | |
531 | set_close_success(&close_success); | |
532 | } | |
533 | lttng_ust_unlock_fd_tracker(); | |
534 | } | |
535 | if (!test_close_success(&close_success)) { | |
536 | /* | |
537 | * OpenBSD return EBADF if fd is greater than all open | |
538 | * file descriptors. | |
539 | */ | |
540 | ret = -1; | |
541 | errno = EBADF; | |
542 | } | |
543 | end: | |
544 | return ret; | |
545 | } | |
f799b0b7 MD |
546 | |
547 | /* Custom upgrade 2.12 to 2.13 */ | |
548 | ||
549 | #undef lttng_ust_add_fd_to_tracker | |
550 | #undef lttng_ust_delete_fd_from_tracker | |
551 | #undef lttng_ust_lock_fd_tracker | |
552 | #undef lttng_ust_unlock_fd_tracker | |
553 | #undef lttng_ust_safe_close_fd | |
554 | #undef lttng_ust_safe_fclose_stream | |
555 | #undef lttng_ust_safe_closefrom_fd | |
556 | ||
557 | int lttng_ust_add_fd_to_tracker1(int fd) | |
558 | __attribute__ ((alias ("lttng_ust_add_fd_to_tracker_orig"))); | |
559 | void lttng_ust_delete_fd_from_tracker1(int fd) | |
560 | __attribute__ ((alias ("lttng_ust_delete_fd_from_tracker_orig"))); | |
561 | void lttng_ust_lock_fd_tracker1(void) | |
562 | __attribute__ ((alias ("lttng_ust_lock_fd_tracker_orig"))); | |
563 | void lttng_ust_unlock_fd_tracker1(void) | |
564 | __attribute__ ((alias ("lttng_ust_unlock_fd_tracker_orig"))); | |
565 | int lttng_ust_safe_close_fd1(int fd, int (*close_cb)(int)) | |
566 | __attribute__ ((alias ("lttng_ust_safe_close_fd_orig"))); | |
567 | int lttng_ust_safe_fclose_stream1(FILE *stream, int (*fclose_cb)(FILE *stream)) | |
568 | __attribute__ ((alias ("lttng_ust_safe_fclose_stream_orig"))); | |
569 | int lttng_ust_safe_closefrom_fd1(int lowfd, int (*close_cb)(int)) | |
570 | __attribute__ ((alias ("lttng_ust_safe_closefrom_fd_orig"))); | |
571 | ||
572 | #ifdef LTTNG_UST_CUSTOM_UPGRADE_CONFLICTING_SYMBOLS | |
573 | int lttng_ust_add_fd_to_tracker(int fd) | |
574 | __attribute__ ((alias ("lttng_ust_add_fd_to_tracker_orig"))); | |
575 | void lttng_ust_delete_fd_from_tracker(int fd) | |
576 | __attribute__ ((alias ("lttng_ust_delete_fd_from_tracker_orig"))); | |
577 | void lttng_ust_lock_fd_tracker(void) | |
578 | __attribute__ ((alias ("lttng_ust_lock_fd_tracker_orig"))); | |
579 | void lttng_ust_unlock_fd_tracker(void) | |
580 | __attribute__ ((alias ("lttng_ust_unlock_fd_tracker_orig"))); | |
581 | int lttng_ust_safe_close_fd(int fd, int (*close_cb)(int)) | |
582 | __attribute__ ((alias ("lttng_ust_safe_close_fd_orig"))); | |
583 | int lttng_ust_safe_fclose_stream(FILE *stream, int (*fclose_cb)(FILE *stream)) | |
584 | __attribute__ ((alias ("lttng_ust_safe_fclose_stream_orig"))); | |
585 | int lttng_ust_safe_closefrom_fd(int lowfd, int (*close_cb)(int)) | |
586 | __attribute__ ((alias ("lttng_ust_safe_closefrom_fd_orig"))); | |
587 | #endif |