1 |
/* |
2 |
* libeio implementation |
3 |
* |
4 |
* Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016,2017 Marc Alexander Lehmann <libeio@schmorp.de> |
5 |
* All rights reserved. |
6 |
* |
7 |
* Redistribution and use in source and binary forms, with or without modifica- |
8 |
* tion, are permitted provided that the following conditions are met: |
9 |
* |
10 |
* 1. Redistributions of source code must retain the above copyright notice, |
11 |
* this list of conditions and the following disclaimer. |
12 |
* |
13 |
* 2. Redistributions in binary form must reproduce the above copyright |
14 |
* notice, this list of conditions and the following disclaimer in the |
15 |
* documentation and/or other materials provided with the distribution. |
16 |
* |
17 |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
18 |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 |
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
20 |
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
21 |
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
22 |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
23 |
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 |
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 |
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 |
* OF THE POSSIBILITY OF SUCH DAMAGE. |
27 |
* |
28 |
* Alternatively, the contents of this file may be used under the terms of |
29 |
* the GNU General Public License ("GPL") version 2 or any later version, |
30 |
* in which case the provisions of the GPL are applicable instead of |
31 |
* the above. If you wish to allow the use of your version of this file |
32 |
* only under the terms of the GPL and not to allow others to use your |
33 |
* version of this file under the BSD license, indicate your decision |
34 |
* by deleting the provisions above and replace them with the notice |
35 |
* and other provisions required by the GPL. If you do not delete the |
36 |
* provisions above, a recipient may use your version of this file under |
37 |
* either the BSD or the GPL. |
38 |
*/ |
39 |
|
40 |
#ifndef _WIN32 |
41 |
# include "config.h" |
42 |
#endif |
43 |
|
44 |
#include "eio.h" |
45 |
#include "ecb.h" |
46 |
|
47 |
#include <errno.h> |
48 |
#include <stddef.h> |
49 |
#include <stdlib.h> |
50 |
#include <string.h> |
51 |
#include <errno.h> |
52 |
#include <sys/types.h> |
53 |
#include <sys/stat.h> |
54 |
#include <limits.h> |
55 |
#include <fcntl.h> |
56 |
#include <assert.h> |
57 |
|
58 |
/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */ |
59 |
/* intptr_t only comes from stdint.h, says idiot openbsd coder */ |
60 |
#if HAVE_STDINT_H |
61 |
# include <stdint.h> |
62 |
#endif |
63 |
|
64 |
#ifndef ECANCELED |
65 |
# define ECANCELED EDOM |
66 |
#endif |
67 |
#ifndef ELOOP |
68 |
# define ELOOP EDOM |
69 |
#endif |
70 |
|
71 |
#if !defined(ENOTSOCK) && defined(WSAENOTSOCK) |
72 |
# define ENOTSOCK WSAENOTSOCK |
73 |
#endif |
74 |
|
75 |
static void eio_destroy (eio_req *req); |
76 |
|
77 |
#ifndef EIO_FINISH |
78 |
# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 |
79 |
#endif |
80 |
|
81 |
#ifndef EIO_DESTROY |
82 |
# define EIO_DESTROY(req) do { if ((req)->destroy) (req)->destroy (req); } while (0) |
83 |
#endif |
84 |
|
85 |
#ifndef EIO_FEED |
86 |
# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) |
87 |
#endif |
88 |
|
89 |
#ifndef EIO_FD_TO_WIN32_HANDLE |
90 |
# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
91 |
#endif |
92 |
#ifndef EIO_WIN32_HANDLE_TO_FD |
93 |
# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
94 |
#endif |
95 |
|
96 |
#define EIO_ERRNO(errval,retval) ((errno = errval), retval) |
97 |
|
98 |
#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1) |
99 |
|
100 |
#ifdef _WIN32 |
101 |
|
102 |
#undef PAGESIZE |
103 |
#define PAGESIZE 4096 /* GetSystemInfo? */ |
104 |
|
105 |
/* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */ |
106 |
|
107 |
#ifdef EIO_STRUCT_STATI64 |
108 |
/* look at perl's non-sloppy stat */ |
109 |
#define stat(path,buf) _stati64 (path,buf) |
110 |
#define fstat(fd,buf) _fstati64 (fd,buf) |
111 |
#endif |
112 |
#define lstat(path,buf) stat (path,buf) |
113 |
#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1)) |
114 |
#define mkdir(path,mode) _mkdir (path) |
115 |
#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1)) |
116 |
|
117 |
#define chmod(path,mode) _chmod (path, mode) |
118 |
#define dup(fd) _dup (fd) |
119 |
#define dup2(fd1,fd2) _dup2 (fd1, fd2) |
120 |
#define pipe(fds) _pipe (fds, 4096, O_BINARY) |
121 |
|
122 |
#define fcntl(fd,cmd,arg) EIO_ENOSYS () |
123 |
#define ioctl(fd,cmd,arg) EIO_ENOSYS () |
124 |
#define fchmod(fd,mode) EIO_ENOSYS () |
125 |
#define chown(path,uid,gid) EIO_ENOSYS () |
126 |
#define fchown(fd,uid,gid) EIO_ENOSYS () |
127 |
#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */ |
128 |
#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */ |
129 |
#define mknod(path,mode,dev) EIO_ENOSYS () |
130 |
#define sync() EIO_ENOSYS () |
131 |
#define readlink(path,buf,s) EIO_ENOSYS () |
132 |
#define statvfs(path,buf) EIO_ENOSYS () |
133 |
#define fstatvfs(fd,buf) EIO_ENOSYS () |
134 |
|
135 |
#define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset) |
136 |
#define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset) |
137 |
|
138 |
#if __GNUC__ |
139 |
typedef long long eio_off_t; /* signed for compatibility to msvc */ |
140 |
#else |
141 |
typedef __int64 eio_off_t; /* unsigned not supported by msvc */ |
142 |
#endif |
143 |
|
144 |
static eio_ssize_t |
145 |
eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset) |
146 |
{ |
147 |
OVERLAPPED o = { 0 }; |
148 |
DWORD got; |
149 |
|
150 |
o.Offset = offset; |
151 |
o.OffsetHigh = offset >> 32; |
152 |
|
153 |
return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o) |
154 |
? got : -1; |
155 |
} |
156 |
|
157 |
static eio_ssize_t |
158 |
eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset) |
159 |
{ |
160 |
OVERLAPPED o = { 0 }; |
161 |
DWORD got; |
162 |
|
163 |
o.Offset = offset; |
164 |
o.OffsetHigh = offset >> 32; |
165 |
|
166 |
return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o) |
167 |
? got : -1; |
168 |
} |
169 |
|
170 |
/* rename() uses MoveFile, which fails to overwrite */ |
171 |
#define rename(old,neu) eio__rename (old, neu) |
172 |
|
173 |
static int |
174 |
eio__rename (const char *old, const char *neu) |
175 |
{ |
176 |
if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING)) |
177 |
return 0; |
178 |
|
179 |
/* should steal _dosmaperr */ |
180 |
switch (GetLastError ()) |
181 |
{ |
182 |
case ERROR_FILE_NOT_FOUND: |
183 |
case ERROR_PATH_NOT_FOUND: |
184 |
case ERROR_INVALID_DRIVE: |
185 |
case ERROR_NO_MORE_FILES: |
186 |
case ERROR_BAD_NETPATH: |
187 |
case ERROR_BAD_NET_NAME: |
188 |
case ERROR_BAD_PATHNAME: |
189 |
case ERROR_FILENAME_EXCED_RANGE: |
190 |
errno = ENOENT; |
191 |
break; |
192 |
|
193 |
default: |
194 |
errno = EACCES; |
195 |
break; |
196 |
} |
197 |
|
198 |
return -1; |
199 |
} |
200 |
|
201 |
/* we could even stat and see if it exists */ |
202 |
static int |
203 |
symlink (const char *old, const char *neu) |
204 |
{ |
205 |
#if WINVER >= 0x0600 |
206 |
int flags; |
207 |
|
208 |
/* This tries out all combinations of SYMBOLIC_LINK_FLAG_DIRECTORY |
209 |
* and SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE, |
210 |
* with directory first. |
211 |
*/ |
212 |
for (flags = 3; flags >= 0; --flags) |
213 |
if (CreateSymbolicLink (neu, old, flags)) |
214 |
return 0; |
215 |
#endif |
216 |
|
217 |
return EIO_ERRNO (ENOENT, -1); |
218 |
} |
219 |
|
220 |
/* POSIX API only, causing trouble for win32 apps */ |
221 |
#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */ |
222 |
#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */ |
223 |
|
224 |
struct statvfs |
225 |
{ |
226 |
int dummy; |
227 |
}; |
228 |
|
229 |
#define DT_DIR EIO_DT_DIR |
230 |
#define DT_REG EIO_DT_REG |
231 |
#define D_NAME(entp) entp.cFileName |
232 |
#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) |
233 |
|
234 |
#else |
235 |
|
236 |
#include <sys/ioctl.h> |
237 |
#include <sys/time.h> |
238 |
#include <sys/select.h> |
239 |
#include <unistd.h> |
240 |
#include <signal.h> |
241 |
#include <dirent.h> |
242 |
|
243 |
#ifdef ANDROID |
244 |
#include <sys/vfs.h> |
245 |
#define statvfs statfs |
246 |
#define fstatvfs fstatfs |
247 |
#include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */ |
248 |
#else |
249 |
#include <sys/statvfs.h> |
250 |
#endif |
251 |
|
252 |
#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES |
253 |
#include <sys/mman.h> |
254 |
#endif |
255 |
|
256 |
#define D_NAME(entp) entp->d_name |
257 |
|
258 |
/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ |
259 |
#if __FreeBSD__ || __NetBSD__ || __OpenBSD__ |
260 |
#define _DIRENT_HAVE_D_TYPE /* sigh */ |
261 |
#define D_INO(de) (de)->d_fileno |
262 |
#define D_NAMLEN(de) (de)->d_namlen |
263 |
#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 |
264 |
#define D_INO(de) (de)->d_ino |
265 |
#endif |
266 |
|
267 |
#ifdef _D_EXACT_NAMLEN |
268 |
#undef D_NAMLEN |
269 |
#define D_NAMLEN(de) _D_EXACT_NAMLEN (de) |
270 |
#endif |
271 |
|
272 |
#ifdef _DIRENT_HAVE_D_TYPE |
273 |
#define D_TYPE(de) (de)->d_type |
274 |
#endif |
275 |
|
276 |
#ifndef EIO_STRUCT_DIRENT |
277 |
#define EIO_STRUCT_DIRENT struct dirent |
278 |
#endif |
279 |
|
280 |
#endif |
281 |
|
282 |
#if HAVE_UTIMES |
283 |
# include <utime.h> |
284 |
#endif |
285 |
|
286 |
#if HAVE_SYS_SYSCALL_H |
287 |
# include <sys/syscall.h> |
288 |
#endif |
289 |
|
290 |
#if HAVE_SENDFILE |
291 |
# if __linux |
292 |
# include <sys/sendfile.h> |
293 |
# elif __FreeBSD__ || defined __APPLE__ |
294 |
# include <sys/socket.h> |
295 |
# include <sys/uio.h> |
296 |
# elif __hpux |
297 |
# include <sys/socket.h> |
298 |
# elif __solaris |
299 |
# include <sys/sendfile.h> |
300 |
# else |
301 |
# error sendfile support requested but not available |
302 |
# endif |
303 |
#endif |
304 |
|
305 |
#if HAVE_RENAMEAT2 |
306 |
# include <sys/syscall.h> |
307 |
# include <linux/fs.h> |
308 |
#endif |
309 |
|
310 |
#ifndef D_TYPE |
311 |
# define D_TYPE(de) 0 |
312 |
#endif |
313 |
#ifndef D_INO |
314 |
# define D_INO(de) 0 |
315 |
#endif |
316 |
#ifndef D_NAMLEN |
317 |
# define D_NAMLEN(entp) strlen (D_NAME (entp)) |
318 |
#endif |
319 |
|
320 |
/* used for struct dirent, AIX doesn't provide it */ |
321 |
#ifndef NAME_MAX |
322 |
# define NAME_MAX 4096 |
323 |
#endif |
324 |
|
325 |
/* used for readlink etc. */ |
326 |
#ifndef PATH_MAX |
327 |
# define PATH_MAX 0 |
328 |
#endif |
329 |
|
330 |
#ifndef O_CLOEXEC |
331 |
#define O_CLOEXEC 0 |
332 |
#endif |
333 |
|
334 |
#ifndef EIO_PATH_MIN |
335 |
# define EIO_PATH_MIN 8160 |
336 |
#endif |
337 |
|
338 |
#define EIO_PATH_MAX (PATH_MAX <= EIO_PATH_MIN ? EIO_PATH_MIN : PATH_MAX) |
339 |
|
340 |
/* buffer size for various temporary buffers */ |
341 |
#define EIO_BUFSIZE 65536 |
342 |
|
343 |
#define dBUF \ |
344 |
char *eio_buf = malloc (EIO_BUFSIZE); \ |
345 |
errno = ENOMEM; \ |
346 |
if (!eio_buf) \ |
347 |
return -1 |
348 |
|
349 |
#define FUBd \ |
350 |
free (eio_buf) |
351 |
|
352 |
/*****************************************************************************/ |
353 |
|
354 |
struct etp_tmpbuf; |
355 |
|
356 |
#if _POSIX_VERSION >= 200809L |
357 |
#define HAVE_AT 1 |
358 |
#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD) |
359 |
#ifndef O_SEARCH |
360 |
#define O_SEARCH O_RDONLY |
361 |
#endif |
362 |
#else |
363 |
#define HAVE_AT 0 |
364 |
static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path); |
365 |
#endif |
366 |
|
367 |
struct eio_pwd |
368 |
{ |
369 |
#if HAVE_AT |
370 |
int fd; |
371 |
#endif |
372 |
int len; |
373 |
char str[1]; /* actually, a 0-terminated canonical path */ |
374 |
}; |
375 |
|
376 |
/*****************************************************************************/ |
377 |
|
378 |
#define ETP_PRI_MIN EIO_PRI_MIN |
379 |
#define ETP_PRI_MAX EIO_PRI_MAX |
380 |
|
381 |
#define ETP_TYPE_QUIT -1 |
382 |
#define ETP_TYPE_GROUP EIO_GROUP |
383 |
|
384 |
static void eio_nop_callback (void) { } |
385 |
static void (*eio_want_poll_cb)(void) = eio_nop_callback; |
386 |
static void (*eio_done_poll_cb)(void) = eio_nop_callback; |
387 |
|
388 |
#define ETP_WANT_POLL(pool) eio_want_poll_cb () |
389 |
#define ETP_DONE_POLL(pool) eio_done_poll_cb () |
390 |
|
391 |
struct etp_worker; |
392 |
#define ETP_REQ eio_req |
393 |
#define ETP_DESTROY(req) eio_destroy (req) |
394 |
static int eio_finish (eio_req *req); |
395 |
#define ETP_FINISH(req) eio_finish (req) |
396 |
static void eio_execute (struct etp_worker *self, eio_req *req); |
397 |
#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req) |
398 |
|
399 |
#include "etp.c" |
400 |
|
401 |
static struct etp_pool eio_pool; |
402 |
#define EIO_POOL (&eio_pool) |
403 |
|
404 |
/*****************************************************************************/ |
405 |
|
406 |
static void |
407 |
grp_try_feed (eio_req *grp) |
408 |
{ |
409 |
while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) |
410 |
{ |
411 |
grp->flags &= ~ETP_FLAG_GROUPADD; |
412 |
|
413 |
EIO_FEED (grp); |
414 |
|
415 |
/* stop if no progress has been made */ |
416 |
if (!(grp->flags & ETP_FLAG_GROUPADD)) |
417 |
{ |
418 |
grp->feed = 0; |
419 |
break; |
420 |
} |
421 |
} |
422 |
} |
423 |
|
424 |
static int |
425 |
grp_dec (eio_req *grp) |
426 |
{ |
427 |
--grp->size; |
428 |
|
429 |
/* call feeder, if applicable */ |
430 |
grp_try_feed (grp); |
431 |
|
432 |
/* finish, if done */ |
433 |
if (!grp->size && grp->flags & ETP_FLAG_DELAYED) |
434 |
return eio_finish (grp); |
435 |
else |
436 |
return 0; |
437 |
} |
438 |
|
439 |
static void |
440 |
eio_destroy (eio_req *req) |
441 |
{ |
442 |
if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); |
443 |
if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); |
444 |
|
445 |
EIO_DESTROY (req); |
446 |
} |
447 |
|
448 |
static int |
449 |
eio_finish (eio_req *req) |
450 |
{ |
451 |
int res = EIO_FINISH (req); |
452 |
|
453 |
if (req->grp) |
454 |
{ |
455 |
int res2; |
456 |
eio_req *grp = req->grp; |
457 |
|
458 |
/* unlink request */ |
459 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
460 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
461 |
|
462 |
if (grp->grp_first == req) |
463 |
grp->grp_first = req->grp_next; |
464 |
|
465 |
res2 = grp_dec (grp); |
466 |
|
467 |
if (!res) |
468 |
res = res2; |
469 |
} |
470 |
|
471 |
eio_destroy (req); |
472 |
|
473 |
return res; |
474 |
} |
475 |
|
476 |
void |
477 |
eio_grp_cancel (eio_req *grp) |
478 |
{ |
479 |
etp_grp_cancel (EIO_POOL, grp); |
480 |
} |
481 |
|
482 |
void |
483 |
eio_cancel (eio_req *req) |
484 |
{ |
485 |
etp_cancel (EIO_POOL, req); |
486 |
} |
487 |
|
488 |
void |
489 |
eio_submit (eio_req *req) |
490 |
{ |
491 |
etp_submit (EIO_POOL, req); |
492 |
} |
493 |
|
494 |
unsigned int |
495 |
eio_nreqs (void) |
496 |
{ |
497 |
return etp_nreqs (EIO_POOL); |
498 |
} |
499 |
|
500 |
unsigned int |
501 |
eio_nready (void) |
502 |
{ |
503 |
return etp_nready (EIO_POOL); |
504 |
} |
505 |
|
506 |
unsigned int |
507 |
eio_npending (void) |
508 |
{ |
509 |
return etp_npending (EIO_POOL); |
510 |
} |
511 |
|
512 |
unsigned int ecb_cold |
513 |
eio_nthreads (void) |
514 |
{ |
515 |
return etp_nthreads (EIO_POOL); |
516 |
} |
517 |
|
518 |
void ecb_cold |
519 |
eio_set_max_poll_time (double nseconds) |
520 |
{ |
521 |
etp_set_max_poll_time (EIO_POOL, nseconds); |
522 |
} |
523 |
|
524 |
void ecb_cold |
525 |
eio_set_max_poll_reqs (unsigned int maxreqs) |
526 |
{ |
527 |
etp_set_max_poll_reqs (EIO_POOL, maxreqs); |
528 |
} |
529 |
|
530 |
void ecb_cold |
531 |
eio_set_max_idle (unsigned int nthreads) |
532 |
{ |
533 |
etp_set_max_idle (EIO_POOL, nthreads); |
534 |
} |
535 |
|
536 |
void ecb_cold |
537 |
eio_set_idle_timeout (unsigned int seconds) |
538 |
{ |
539 |
etp_set_idle_timeout (EIO_POOL, seconds); |
540 |
} |
541 |
|
542 |
void ecb_cold |
543 |
eio_set_min_parallel (unsigned int nthreads) |
544 |
{ |
545 |
etp_set_min_parallel (EIO_POOL, nthreads); |
546 |
} |
547 |
|
548 |
void ecb_cold |
549 |
eio_set_max_parallel (unsigned int nthreads) |
550 |
{ |
551 |
etp_set_max_parallel (EIO_POOL, nthreads); |
552 |
} |
553 |
|
554 |
int eio_poll (void) |
555 |
{ |
556 |
return etp_poll (EIO_POOL); |
557 |
} |
558 |
|
559 |
/*****************************************************************************/ |
560 |
/* work around various missing functions */ |
561 |
|
562 |
#if HAVE_POSIX_CLOSE && !__linux |
563 |
# define eio__close(fd) posix_close (fd, 0) |
564 |
#else |
565 |
# define eio__close(fd) close (fd) |
566 |
#endif |
567 |
|
568 |
/* close() without disturbing errno */ |
569 |
static void |
570 |
silent_close (int fd) |
571 |
{ |
572 |
int saved_errno = errno; |
573 |
eio__close (fd); |
574 |
errno = saved_errno; |
575 |
} |
576 |
|
577 |
#ifndef HAVE_UTIMES |
578 |
|
579 |
# undef utimes |
580 |
# define utimes(path,times) eio__utimes (path, times) |
581 |
|
582 |
static int |
583 |
eio__utimes (const char *filename, const struct timeval times[2]) |
584 |
{ |
585 |
if (times) |
586 |
{ |
587 |
struct utimbuf buf; |
588 |
|
589 |
buf.actime = times[0].tv_sec; |
590 |
buf.modtime = times[1].tv_sec; |
591 |
|
592 |
return utime (filename, &buf); |
593 |
} |
594 |
else |
595 |
return utime (filename, 0); |
596 |
} |
597 |
|
598 |
#endif |
599 |
|
600 |
#ifndef HAVE_FUTIMES |
601 |
|
602 |
# undef futimes |
603 |
# define futimes(fd,times) eio__futimes (fd, times) |
604 |
|
605 |
static int |
606 |
eio__futimes (int fd, const struct timeval tv[2]) |
607 |
{ |
608 |
errno = ENOSYS; |
609 |
return -1; |
610 |
} |
611 |
|
612 |
#endif |
613 |
|
614 |
#if !HAVE_FDATASYNC |
615 |
# undef fdatasync |
616 |
# define fdatasync(fd) fsync (fd) |
617 |
#endif |
618 |
|
619 |
static int |
620 |
eio__syncfs (int fd) |
621 |
{ |
622 |
int res; |
623 |
|
624 |
#if HAVE_SYS_SYNCFS |
625 |
res = (int)syscall (__NR_syncfs, (int)(fd)); |
626 |
#else |
627 |
res = EIO_ENOSYS (); |
628 |
#endif |
629 |
|
630 |
if (res < 0 && errno == ENOSYS && fd >= 0) |
631 |
sync (); |
632 |
|
633 |
return res; |
634 |
} |
635 |
|
636 |
/* sync_file_range always needs emulation */ |
637 |
static int |
638 |
eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) |
639 |
{ |
640 |
#if HAVE_SYNC_FILE_RANGE |
641 |
int res; |
642 |
|
643 |
if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE |
644 |
|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE |
645 |
|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER) |
646 |
{ |
647 |
flags = 0 |
648 |
| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0) |
649 |
| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0) |
650 |
| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0); |
651 |
} |
652 |
|
653 |
res = sync_file_range (fd, offset, nbytes, flags); |
654 |
|
655 |
if (!res || errno != ENOSYS) |
656 |
return res; |
657 |
#endif |
658 |
|
659 |
/* even though we could play tricks with the flags, it's better to always |
660 |
* call fdatasync, as that matches the expectation of its users best */ |
661 |
return fdatasync (fd); |
662 |
} |
663 |
|
664 |
static int |
665 |
eio__fallocate (int fd, int mode, off_t offset, size_t len) |
666 |
{ |
667 |
#if HAVE_LINUX_FALLOCATE |
668 |
return fallocate (fd, mode, offset, len); |
669 |
#else |
670 |
return EIO_ENOSYS (); |
671 |
#endif |
672 |
} |
673 |
|
674 |
#if !HAVE_READAHEAD |
675 |
# undef readahead |
676 |
# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) |
677 |
|
678 |
static eio_ssize_t |
679 |
eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) |
680 |
{ |
681 |
size_t todo = count; |
682 |
dBUF; |
683 |
|
684 |
while (todo > 0) |
685 |
{ |
686 |
size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; |
687 |
|
688 |
pread (fd, eio_buf, len, offset); |
689 |
offset += len; |
690 |
todo -= len; |
691 |
} |
692 |
|
693 |
FUBd; |
694 |
|
695 |
/* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */ |
696 |
/* but not for e.g. EIO or eof, so we also never fail */ |
697 |
return 0; |
698 |
} |
699 |
|
700 |
#endif |
701 |
|
702 |
/* sendfile always needs emulation */ |
703 |
static eio_ssize_t |
704 |
eio__sendfile (int ofd, int ifd, off_t offset, size_t count) |
705 |
{ |
706 |
eio_ssize_t written = 0; |
707 |
eio_ssize_t res; |
708 |
|
709 |
if (!count) |
710 |
return 0; |
711 |
|
712 |
for (;;) |
713 |
{ |
714 |
#ifdef __APPLE__ |
715 |
# undef HAVE_SENDFILE /* broken, as everything on os x */ |
716 |
#endif |
717 |
#if HAVE_SENDFILE |
718 |
# if __linux |
719 |
off_t soffset = offset; |
720 |
res = sendfile (ofd, ifd, &soffset, count); |
721 |
|
722 |
# elif __FreeBSD__ |
723 |
/* |
724 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
725 |
* wasted on making it similar to other I/O functions. |
726 |
*/ |
727 |
off_t sbytes; |
728 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
729 |
|
730 |
#if 0 /* according to the manpage, this is correct, but broken behaviour */ |
731 |
/* freebsd' sendfile will return 0 on success */ |
732 |
/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ |
733 |
/* not on e.g. EIO or EPIPE - sounds broken */ |
734 |
if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) |
735 |
res = sbytes; |
736 |
#endif |
737 |
|
738 |
/* according to source inspection, this is correct, and useful behaviour */ |
739 |
if (sbytes) |
740 |
res = sbytes; |
741 |
|
742 |
# elif defined __APPLE__ |
743 |
off_t sbytes = count; |
744 |
res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); |
745 |
|
746 |
/* according to the manpage, sbytes is always valid */ |
747 |
if (sbytes) |
748 |
res = sbytes; |
749 |
|
750 |
# elif __hpux |
751 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
752 |
|
753 |
# elif __solaris |
754 |
struct sendfilevec vec; |
755 |
size_t sbytes; |
756 |
|
757 |
vec.sfv_fd = ifd; |
758 |
vec.sfv_flag = 0; |
759 |
vec.sfv_off = offset; |
760 |
vec.sfv_len = count; |
761 |
|
762 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
763 |
|
764 |
if (res < 0 && sbytes) |
765 |
res = sbytes; |
766 |
|
767 |
# endif |
768 |
|
769 |
#elif defined (_WIN32) && 0 |
770 |
/* does not work, just for documentation of what would need to be done */ |
771 |
/* actually, cannot be done like this, as TransmitFile changes the file offset, */ |
772 |
/* libeio guarantees that the file offset does not change, and windows */ |
773 |
/* has no way to get an independent handle to the same file description */ |
774 |
HANDLE h = TO_SOCKET (ifd); |
775 |
SetFilePointer (h, offset, 0, FILE_BEGIN); |
776 |
res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); |
777 |
|
778 |
#else |
779 |
res = EIO_ENOSYS (); |
780 |
#endif |
781 |
|
782 |
/* we assume sendfile can copy at least 128mb in one go */ |
783 |
if (res <= 128 * 1024 * 1024) |
784 |
{ |
785 |
if (res > 0) |
786 |
written += res; |
787 |
|
788 |
if (written) |
789 |
return written; |
790 |
|
791 |
break; |
792 |
} |
793 |
else |
794 |
{ |
795 |
/* if we requested more, then probably the kernel was lazy */ |
796 |
written += res; |
797 |
offset += res; |
798 |
count -= res; |
799 |
|
800 |
if (!count) |
801 |
return written; |
802 |
} |
803 |
} |
804 |
|
805 |
if (res < 0 |
806 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
807 |
/* BSDs */ |
808 |
#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ |
809 |
|| errno == ENOTSUP |
810 |
#endif |
811 |
#ifdef EOPNOTSUPP /* windows */ |
812 |
|| errno == EOPNOTSUPP /* BSDs */ |
813 |
#endif |
814 |
#if __solaris |
815 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
816 |
#endif |
817 |
) |
818 |
) |
819 |
{ |
820 |
/* emulate sendfile. this is a major pain in the ass */ |
821 |
dBUF; |
822 |
|
823 |
res = 0; |
824 |
|
825 |
while (count) |
826 |
{ |
827 |
eio_ssize_t cnt; |
828 |
|
829 |
cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); |
830 |
|
831 |
if (cnt <= 0) |
832 |
{ |
833 |
if (cnt && !res) res = -1; |
834 |
break; |
835 |
} |
836 |
|
837 |
cnt = write (ofd, eio_buf, cnt); |
838 |
|
839 |
if (cnt <= 0) |
840 |
{ |
841 |
if (cnt && !res) res = -1; |
842 |
break; |
843 |
} |
844 |
|
845 |
offset += cnt; |
846 |
res += cnt; |
847 |
count -= cnt; |
848 |
} |
849 |
|
850 |
FUBd; |
851 |
} |
852 |
|
853 |
return res; |
854 |
} |
855 |
|
856 |
#ifdef PAGESIZE |
857 |
# define eio_pagesize() PAGESIZE |
858 |
#else |
859 |
static intptr_t |
860 |
eio_pagesize (void) |
861 |
{ |
862 |
static intptr_t page; |
863 |
|
864 |
if (!page) |
865 |
page = sysconf (_SC_PAGESIZE); |
866 |
|
867 |
return page; |
868 |
} |
869 |
#endif |
870 |
|
871 |
static void |
872 |
eio_page_align (void **addr, size_t *length) |
873 |
{ |
874 |
intptr_t mask = eio_pagesize () - 1; |
875 |
|
876 |
/* round down addr */ |
877 |
intptr_t adj = mask & (intptr_t)*addr; |
878 |
|
879 |
*addr = (void *)((intptr_t)*addr - adj); |
880 |
*length += adj; |
881 |
|
882 |
/* round up length */ |
883 |
*length = (*length + mask) & ~mask; |
884 |
} |
885 |
|
886 |
#if !_POSIX_MEMLOCK |
887 |
# define eio__mlockall(a) EIO_ENOSYS () |
888 |
#else |
889 |
|
890 |
static int |
891 |
eio__mlockall (int flags) |
892 |
{ |
893 |
#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7 |
894 |
extern int mallopt (int, int); |
895 |
mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */ |
896 |
#endif |
897 |
|
898 |
if (EIO_MCL_CURRENT != MCL_CURRENT |
899 |
|| EIO_MCL_FUTURE != MCL_FUTURE) |
900 |
{ |
901 |
flags = 0 |
902 |
| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0) |
903 |
| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0); |
904 |
} |
905 |
|
906 |
return mlockall (flags); |
907 |
} |
908 |
#endif |
909 |
|
910 |
#if !_POSIX_MEMLOCK_RANGE |
911 |
# define eio__mlock(a,b) EIO_ENOSYS () |
912 |
#else |
913 |
|
914 |
static int |
915 |
eio__mlock (void *addr, size_t length) |
916 |
{ |
917 |
eio_page_align (&addr, &length); |
918 |
|
919 |
return mlock (addr, length); |
920 |
} |
921 |
|
922 |
#endif |
923 |
|
924 |
#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) |
925 |
# define eio__msync(a,b,c) EIO_ENOSYS () |
926 |
#else |
927 |
|
928 |
static int |
929 |
eio__msync (void *mem, size_t len, int flags) |
930 |
{ |
931 |
eio_page_align (&mem, &len); |
932 |
|
933 |
if (EIO_MS_ASYNC != MS_SYNC |
934 |
|| EIO_MS_INVALIDATE != MS_INVALIDATE |
935 |
|| EIO_MS_SYNC != MS_SYNC) |
936 |
{ |
937 |
flags = 0 |
938 |
| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0) |
939 |
| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0) |
940 |
| (flags & EIO_MS_SYNC ? MS_SYNC : 0); |
941 |
} |
942 |
|
943 |
return msync (mem, len, flags); |
944 |
} |
945 |
|
946 |
#endif |
947 |
|
948 |
static int |
949 |
eio__mtouch (eio_req *req) |
950 |
{ |
951 |
void *mem = req->ptr2; |
952 |
size_t len = req->size; |
953 |
int flags = req->int1; |
954 |
|
955 |
eio_page_align (&mem, &len); |
956 |
|
957 |
{ |
958 |
intptr_t addr = (intptr_t)mem; |
959 |
intptr_t end = addr + len; |
960 |
intptr_t page = eio_pagesize (); |
961 |
|
962 |
if (addr < end) |
963 |
if (flags & EIO_MT_MODIFY) /* modify */ |
964 |
do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req)); |
965 |
else |
966 |
do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req)); |
967 |
} |
968 |
|
969 |
return 0; |
970 |
} |
971 |
|
972 |
/*****************************************************************************/ |
973 |
/* requests implemented outside eio_execute, because they are so large */ |
974 |
|
975 |
static void |
976 |
eio__lseek (eio_req *req) |
977 |
{ |
978 |
/* this usually gets optimised away completely, or your compiler sucks, */ |
979 |
/* or the whence constants really are not 0, 1, 2 */ |
980 |
int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET |
981 |
: req->int2 == EIO_SEEK_CUR ? SEEK_CUR |
982 |
: req->int2 == EIO_SEEK_END ? SEEK_END |
983 |
: req->int2; |
984 |
|
985 |
req->offs = lseek (req->int1, req->offs, whence); |
986 |
req->result = req->offs == (off_t)-1 ? -1 : 0; |
987 |
} |
988 |
|
989 |
/* result will always end up in tmpbuf, there is always space for adding a 0-byte */ |
990 |
static int |
991 |
eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) |
992 |
{ |
993 |
char *res; |
994 |
const char *rel = path; |
995 |
char *tmp1, *tmp2; |
996 |
#if SYMLOOP_MAX > 32 |
997 |
int symlinks = SYMLOOP_MAX; |
998 |
#else |
999 |
int symlinks = 32; |
1000 |
#endif |
1001 |
|
1002 |
errno = EINVAL; |
1003 |
if (!rel) |
1004 |
return -1; |
1005 |
|
1006 |
errno = ENOENT; |
1007 |
if (!*rel) |
1008 |
return -1; |
1009 |
|
1010 |
res = etp_tmpbuf_get (tmpbuf, EIO_PATH_MAX * 3); |
1011 |
#ifdef _WIN32 |
1012 |
if (_access (rel, 4) != 0) |
1013 |
return -1; |
1014 |
|
1015 |
symlinks = GetFullPathName (rel, EIO_PATH_MAX * 3, res, 0); |
1016 |
|
1017 |
errno = ENAMETOOLONG; |
1018 |
if (symlinks >= EIO_PATH_MAX * 3) |
1019 |
return -1; |
1020 |
|
1021 |
errno = EIO; |
1022 |
if (symlinks <= 0) |
1023 |
return -1; |
1024 |
|
1025 |
return symlinks; |
1026 |
|
1027 |
#else |
1028 |
tmp1 = res + EIO_PATH_MAX; |
1029 |
tmp2 = tmp1 + EIO_PATH_MAX; |
1030 |
|
1031 |
#if 0 /* disabled, the musl way to do things is just too racy */ |
1032 |
#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME) |
1033 |
/* on linux we may be able to ask the kernel */ |
1034 |
{ |
1035 |
int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME); |
1036 |
|
1037 |
if (fd >= 0) |
1038 |
{ |
1039 |
sprintf (tmp1, "/proc/self/fd/%d", fd); |
1040 |
req->result = readlink (tmp1, res, EIO_PATH_MAX); |
1041 |
/* here we should probably stat the open file and the disk file, to make sure they still match */ |
1042 |
eio__close (fd); |
1043 |
|
1044 |
if (req->result > 0) |
1045 |
goto done; |
1046 |
} |
1047 |
else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) |
1048 |
return -1; |
1049 |
} |
1050 |
#endif |
1051 |
#endif |
1052 |
|
1053 |
if (*rel != '/') |
1054 |
{ |
1055 |
int len; |
1056 |
|
1057 |
errno = ENOENT; |
1058 |
if (wd == EIO_INVALID_WD) |
1059 |
return -1; |
1060 |
|
1061 |
if (wd == EIO_CWD) |
1062 |
{ |
1063 |
if (!getcwd (res, EIO_PATH_MAX)) |
1064 |
return -1; |
1065 |
|
1066 |
len = strlen (res); |
1067 |
} |
1068 |
else |
1069 |
memcpy (res, wd->str, len = wd->len); |
1070 |
|
1071 |
if (res [1]) /* only use if not / */ |
1072 |
res += len; |
1073 |
} |
1074 |
|
1075 |
while (*rel) |
1076 |
{ |
1077 |
eio_ssize_t len, linklen; |
1078 |
const char *beg = rel; |
1079 |
|
1080 |
while (*rel && *rel != '/') |
1081 |
++rel; |
1082 |
|
1083 |
len = rel - beg; |
1084 |
|
1085 |
if (!len) /* skip slashes */ |
1086 |
{ |
1087 |
++rel; |
1088 |
continue; |
1089 |
} |
1090 |
|
1091 |
if (beg [0] == '.') |
1092 |
{ |
1093 |
if (len == 1) |
1094 |
continue; /* . - nop */ |
1095 |
|
1096 |
if (beg [1] == '.' && len == 2) |
1097 |
{ |
1098 |
/* .. - back up one component, if possible */ |
1099 |
|
1100 |
while (res != tmpbuf->ptr) |
1101 |
if (*--res == '/') |
1102 |
break; |
1103 |
|
1104 |
continue; |
1105 |
} |
1106 |
} |
1107 |
|
1108 |
errno = ENAMETOOLONG; |
1109 |
if (res + 1 + len + 1 >= tmp1) |
1110 |
return -1; |
1111 |
|
1112 |
/* copy one component */ |
1113 |
*res = '/'; |
1114 |
memcpy (res + 1, beg, len); |
1115 |
|
1116 |
/* zero-terminate, for readlink */ |
1117 |
res [len + 1] = 0; |
1118 |
|
1119 |
/* now check if it's a symlink */ |
1120 |
linklen = readlink (tmpbuf->ptr, tmp1, EIO_PATH_MAX); |
1121 |
|
1122 |
if (linklen < 0) |
1123 |
{ |
1124 |
if (errno != EINVAL) |
1125 |
return -1; |
1126 |
|
1127 |
/* it's a normal directory. hopefully */ |
1128 |
res += len + 1; |
1129 |
} |
1130 |
else |
1131 |
{ |
1132 |
/* yay, it was a symlink - build new path in tmp2 */ |
1133 |
int rellen = strlen (rel); |
1134 |
|
1135 |
errno = ENAMETOOLONG; |
1136 |
if (linklen + 1 + rellen >= EIO_PATH_MAX) /* also catch linklen >= EIO_PATH_MAX */ |
1137 |
return -1; |
1138 |
|
1139 |
errno = ELOOP; |
1140 |
if (!--symlinks) |
1141 |
return -1; |
1142 |
|
1143 |
if (*tmp1 == '/') |
1144 |
res = tmpbuf->ptr; /* symlink resolves to an absolute path */ |
1145 |
|
1146 |
/* we need to be careful, as rel might point into tmp2 already */ |
1147 |
memmove (tmp2 + linklen + 1, rel, rellen + 1); |
1148 |
tmp2 [linklen] = '/'; |
1149 |
memcpy (tmp2, tmp1, linklen); |
1150 |
|
1151 |
rel = tmp2; |
1152 |
} |
1153 |
} |
1154 |
|
1155 |
/* special case for the lone root path */ |
1156 |
if (res == tmpbuf->ptr) |
1157 |
*res++ = '/'; |
1158 |
|
1159 |
return res - (char *)tmpbuf->ptr; |
1160 |
#endif |
1161 |
} |
1162 |
|
1163 |
static signed char |
1164 |
eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) |
1165 |
{ |
1166 |
return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */ |
1167 |
: a->inode < b->inode ? -1 |
1168 |
: a->inode > b->inode ? 1 |
1169 |
: 0; |
1170 |
} |
1171 |
|
1172 |
#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0 |
1173 |
|
1174 |
#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */ |
1175 |
#define EIO_SORT_FAST 60 /* when to only use insertion sort */ |
1176 |
|
1177 |
static void |
1178 |
eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) |
1179 |
{ |
1180 |
unsigned char bits [9 + sizeof (eio_ino_t) * 8]; |
1181 |
unsigned char *bit = bits; |
1182 |
|
1183 |
assert (CHAR_BIT == 8); |
1184 |
assert (sizeof (eio_dirent) * 8 < 256); |
1185 |
assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */ |
1186 |
assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */ |
1187 |
|
1188 |
if (size <= EIO_SORT_FAST) |
1189 |
return; |
1190 |
|
1191 |
/* first prepare an array of bits to test in our radix sort */ |
1192 |
/* try to take endianness into account, as well as differences in eio_ino_t sizes */ |
1193 |
/* inode_bits must contain all inodes ORed together */ |
1194 |
/* which is used to skip bits that are 0 everywhere, which is very common */ |
1195 |
{ |
1196 |
eio_ino_t endianness; |
1197 |
int i, j; |
1198 |
|
1199 |
/* we store the byte offset of byte n into byte n of "endianness" */ |
1200 |
for (i = 0; i < sizeof (eio_ino_t); ++i) |
1201 |
((unsigned char *)&endianness)[i] = i; |
1202 |
|
1203 |
*bit++ = 0; |
1204 |
|
1205 |
for (i = 0; i < sizeof (eio_ino_t); ++i) |
1206 |
{ |
1207 |
/* shifting off the byte offsets out of "endianness" */ |
1208 |
int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8; |
1209 |
endianness >>= 8; |
1210 |
|
1211 |
for (j = 0; j < 8; ++j) |
1212 |
if (inode_bits & (((eio_ino_t)1) << (i * 8 + j))) |
1213 |
*bit++ = offs + j; |
1214 |
} |
1215 |
|
1216 |
for (j = 0; j < 8; ++j) |
1217 |
if (score_bits & (1 << j)) |
1218 |
*bit++ = offsetof (eio_dirent, score) * 8 + j; |
1219 |
} |
1220 |
|
1221 |
/* now actually do the sorting (a variant of MSD radix sort) */ |
1222 |
{ |
1223 |
eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base; |
1224 |
eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end; |
1225 |
unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8]; |
1226 |
int stk_idx = 0; |
1227 |
|
1228 |
base_stk [stk_idx] = dents; |
1229 |
end_stk [stk_idx] = dents + size; |
1230 |
bit_stk [stk_idx] = bit - 1; |
1231 |
|
1232 |
do |
1233 |
{ |
1234 |
base = base_stk [stk_idx]; |
1235 |
end = end_stk [stk_idx]; |
1236 |
bit = bit_stk [stk_idx]; |
1237 |
|
1238 |
for (;;) |
1239 |
{ |
1240 |
unsigned char O = *bit >> 3; |
1241 |
unsigned char M = 1 << (*bit & 7); |
1242 |
|
1243 |
eio_dirent *a = base; |
1244 |
eio_dirent *b = end; |
1245 |
|
1246 |
if (b - a < EIO_SORT_CUTOFF) |
1247 |
break; |
1248 |
|
1249 |
/* now bit-partition the array on the bit */ |
1250 |
/* this ugly asymmetric loop seems to perform much better than typical */ |
1251 |
/* partition algos found in the literature */ |
1252 |
do |
1253 |
if (!(((unsigned char *)a)[O] & M)) |
1254 |
++a; |
1255 |
else if (!(((unsigned char *)--b)[O] & M)) |
1256 |
{ |
1257 |
eio_dirent tmp = *a; *a = *b; *b = tmp; |
1258 |
++a; |
1259 |
} |
1260 |
while (b > a); |
1261 |
|
1262 |
/* next bit, or stop, if no bits left in this path */ |
1263 |
if (!*--bit) |
1264 |
break; |
1265 |
|
1266 |
base_stk [stk_idx] = a; |
1267 |
end_stk [stk_idx] = end; |
1268 |
bit_stk [stk_idx] = bit; |
1269 |
++stk_idx; |
1270 |
|
1271 |
end = a; |
1272 |
} |
1273 |
} |
1274 |
while (stk_idx--); |
1275 |
} |
1276 |
} |
1277 |
|
1278 |
static void |
1279 |
eio_dent_insertion_sort (eio_dirent *dents, int size) |
1280 |
{ |
1281 |
/* first move the smallest element to the front, to act as a sentinel */ |
1282 |
{ |
1283 |
int i; |
1284 |
eio_dirent *min = dents; |
1285 |
|
1286 |
/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */ |
1287 |
for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; ) |
1288 |
if (EIO_DENT_CMP (dents [i], <, *min)) |
1289 |
min = &dents [i]; |
1290 |
|
1291 |
/* swap elements 0 and j (minimum) */ |
1292 |
{ |
1293 |
eio_dirent tmp = *dents; *dents = *min; *min = tmp; |
1294 |
} |
1295 |
} |
1296 |
|
1297 |
/* then do standard insertion sort, assuming that all elements are >= dents [0] */ |
1298 |
{ |
1299 |
eio_dirent *i, *j; |
1300 |
|
1301 |
for (i = dents + 1; i < dents + size; ++i) |
1302 |
{ |
1303 |
eio_dirent value = *i; |
1304 |
|
1305 |
for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j) |
1306 |
j [1] = j [0]; |
1307 |
|
1308 |
j [1] = value; |
1309 |
} |
1310 |
} |
1311 |
} |
1312 |
|
1313 |
static void |
1314 |
eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) |
1315 |
{ |
1316 |
if (size <= 1) |
1317 |
return; /* our insertion sort relies on size > 0 */ |
1318 |
|
1319 |
/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */ |
1320 |
/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */ |
1321 |
eio_dent_radix_sort (dents, size, score_bits, inode_bits); |
1322 |
|
1323 |
/* use an insertion sort at the end, or for small arrays, */ |
1324 |
/* as insertion sort is more efficient for small partitions */ |
1325 |
eio_dent_insertion_sort (dents, size); |
1326 |
} |
1327 |
|
1328 |
/* read a full directory */ |
1329 |
static void |
1330 |
eio__scandir (eio_req *req, etp_worker *self) |
1331 |
{ |
1332 |
char *name, *names; |
1333 |
int namesalloc = 4096 - sizeof (void *) * 4; |
1334 |
int namesoffs = 0; |
1335 |
int flags = req->int1; |
1336 |
eio_dirent *dents = 0; |
1337 |
int dentalloc = 128; |
1338 |
int dentoffs = 0; |
1339 |
eio_ino_t inode_bits = 0; |
1340 |
#ifdef _WIN32 |
1341 |
HANDLE dirp; |
1342 |
WIN32_FIND_DATA entp; |
1343 |
#else |
1344 |
DIR *dirp; |
1345 |
EIO_STRUCT_DIRENT *entp; |
1346 |
#endif |
1347 |
|
1348 |
req->result = -1; |
1349 |
|
1350 |
if (!(flags & EIO_READDIR_DENTS)) |
1351 |
flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); |
1352 |
|
1353 |
#ifdef _WIN32 |
1354 |
{ |
1355 |
int len = strlen ((const char *)req->ptr1); |
1356 |
char *path = malloc (MAX_PATH); |
1357 |
const char *fmt; |
1358 |
const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1); |
1359 |
|
1360 |
if (!len) |
1361 |
fmt = "./*"; |
1362 |
else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\') |
1363 |
fmt = "%s*"; |
1364 |
else |
1365 |
fmt = "%s/*"; |
1366 |
|
1367 |
_snprintf (path, MAX_PATH, fmt, reqpath); |
1368 |
dirp = FindFirstFile (path, &entp); |
1369 |
free (path); |
1370 |
|
1371 |
if (dirp == INVALID_HANDLE_VALUE) |
1372 |
{ |
1373 |
/* should steal _dosmaperr */ |
1374 |
switch (GetLastError ()) |
1375 |
{ |
1376 |
case ERROR_FILE_NOT_FOUND: |
1377 |
req->result = 0; |
1378 |
break; |
1379 |
|
1380 |
case ERROR_INVALID_NAME: |
1381 |
case ERROR_PATH_NOT_FOUND: |
1382 |
case ERROR_NO_MORE_FILES: |
1383 |
errno = ENOENT; |
1384 |
break; |
1385 |
|
1386 |
case ERROR_NOT_ENOUGH_MEMORY: |
1387 |
errno = ENOMEM; |
1388 |
break; |
1389 |
|
1390 |
default: |
1391 |
errno = EINVAL; |
1392 |
break; |
1393 |
} |
1394 |
|
1395 |
return; |
1396 |
} |
1397 |
} |
1398 |
#else |
1399 |
#if HAVE_AT |
1400 |
if (req->wd) |
1401 |
{ |
1402 |
int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY); |
1403 |
|
1404 |
if (fd < 0) |
1405 |
return; |
1406 |
|
1407 |
dirp = fdopendir (fd); |
1408 |
|
1409 |
if (!dirp) |
1410 |
silent_close (fd); |
1411 |
} |
1412 |
else |
1413 |
dirp = opendir (req->ptr1); |
1414 |
#else |
1415 |
dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1)); |
1416 |
#endif |
1417 |
|
1418 |
if (!dirp) |
1419 |
return; |
1420 |
#endif |
1421 |
|
1422 |
if (req->flags & EIO_FLAG_PTR1_FREE) |
1423 |
free (req->ptr1); |
1424 |
|
1425 |
req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; |
1426 |
req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; |
1427 |
req->ptr2 = names = malloc (namesalloc); |
1428 |
|
1429 |
if (!names || (flags && !dents)) |
1430 |
return; |
1431 |
|
1432 |
for (;;) |
1433 |
{ |
1434 |
int done; |
1435 |
|
1436 |
#ifdef _WIN32 |
1437 |
done = !dirp; |
1438 |
#else |
1439 |
errno = 0; |
1440 |
entp = readdir (dirp); |
1441 |
done = !entp; |
1442 |
#endif |
1443 |
|
1444 |
if (done) |
1445 |
{ |
1446 |
#ifndef _WIN32 |
1447 |
int old_errno = errno; |
1448 |
closedir (dirp); |
1449 |
errno = old_errno; |
1450 |
|
1451 |
if (errno) |
1452 |
break; |
1453 |
#endif |
1454 |
|
1455 |
/* sort etc. */ |
1456 |
req->int1 = flags; |
1457 |
req->result = dentoffs; |
1458 |
|
1459 |
if (flags & EIO_READDIR_STAT_ORDER) |
1460 |
eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits); |
1461 |
else if (flags & EIO_READDIR_DIRS_FIRST) |
1462 |
if (flags & EIO_READDIR_FOUND_UNKNOWN) |
1463 |
eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */ |
1464 |
else |
1465 |
{ |
1466 |
/* in this case, all is known, and we just put dirs first and sort them */ |
1467 |
eio_dirent *oth = dents + dentoffs; |
1468 |
eio_dirent *dir = dents; |
1469 |
|
1470 |
/* now partition dirs to the front, and non-dirs to the back */ |
1471 |
/* by walking from both sides and swapping if necessary */ |
1472 |
while (oth > dir) |
1473 |
{ |
1474 |
if (dir->type == EIO_DT_DIR) |
1475 |
++dir; |
1476 |
else if ((--oth)->type == EIO_DT_DIR) |
1477 |
{ |
1478 |
eio_dirent tmp = *dir; *dir = *oth; *oth = tmp; |
1479 |
|
1480 |
++dir; |
1481 |
} |
1482 |
} |
1483 |
|
1484 |
/* now sort the dirs only (dirs all have the same score) */ |
1485 |
eio_dent_sort (dents, dir - dents, 0, inode_bits); |
1486 |
} |
1487 |
|
1488 |
break; |
1489 |
} |
1490 |
|
1491 |
/* now add the entry to our list(s) */ |
1492 |
name = D_NAME (entp); |
1493 |
|
1494 |
/* skip . and .. entries */ |
1495 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1496 |
{ |
1497 |
int len = D_NAMLEN (entp) + 1; |
1498 |
|
1499 |
while (ecb_expect_false (namesoffs + len > namesalloc)) |
1500 |
{ |
1501 |
namesalloc *= 2; |
1502 |
req->ptr2 = names = realloc (names, namesalloc); |
1503 |
|
1504 |
if (!names) |
1505 |
break; |
1506 |
} |
1507 |
|
1508 |
memcpy (names + namesoffs, name, len); |
1509 |
|
1510 |
if (dents) |
1511 |
{ |
1512 |
struct eio_dirent *ent; |
1513 |
|
1514 |
if (ecb_expect_false (dentoffs == dentalloc)) |
1515 |
{ |
1516 |
dentalloc *= 2; |
1517 |
req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); |
1518 |
|
1519 |
if (!dents) |
1520 |
break; |
1521 |
} |
1522 |
|
1523 |
ent = dents + dentoffs; |
1524 |
|
1525 |
ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */ |
1526 |
ent->namelen = len - 1; |
1527 |
ent->inode = D_INO (entp); |
1528 |
|
1529 |
inode_bits |= ent->inode; |
1530 |
|
1531 |
switch (D_TYPE (entp)) |
1532 |
{ |
1533 |
default: |
1534 |
ent->type = EIO_DT_UNKNOWN; |
1535 |
flags |= EIO_READDIR_FOUND_UNKNOWN; |
1536 |
break; |
1537 |
|
1538 |
#ifdef DT_FIFO |
1539 |
case DT_FIFO: ent->type = EIO_DT_FIFO; break; |
1540 |
#endif |
1541 |
#ifdef DT_CHR |
1542 |
case DT_CHR: ent->type = EIO_DT_CHR; break; |
1543 |
#endif |
1544 |
#ifdef DT_MPC |
1545 |
case DT_MPC: ent->type = EIO_DT_MPC; break; |
1546 |
#endif |
1547 |
#ifdef DT_DIR |
1548 |
case DT_DIR: ent->type = EIO_DT_DIR; break; |
1549 |
#endif |
1550 |
#ifdef DT_NAM |
1551 |
case DT_NAM: ent->type = EIO_DT_NAM; break; |
1552 |
#endif |
1553 |
#ifdef DT_BLK |
1554 |
case DT_BLK: ent->type = EIO_DT_BLK; break; |
1555 |
#endif |
1556 |
#ifdef DT_MPB |
1557 |
case DT_MPB: ent->type = EIO_DT_MPB; break; |
1558 |
#endif |
1559 |
#ifdef DT_REG |
1560 |
case DT_REG: ent->type = EIO_DT_REG; break; |
1561 |
#endif |
1562 |
#ifdef DT_NWK |
1563 |
case DT_NWK: ent->type = EIO_DT_NWK; break; |
1564 |
#endif |
1565 |
#ifdef DT_CMP |
1566 |
case DT_CMP: ent->type = EIO_DT_CMP; break; |
1567 |
#endif |
1568 |
#ifdef DT_LNK |
1569 |
case DT_LNK: ent->type = EIO_DT_LNK; break; |
1570 |
#endif |
1571 |
#ifdef DT_SOCK |
1572 |
case DT_SOCK: ent->type = EIO_DT_SOCK; break; |
1573 |
#endif |
1574 |
#ifdef DT_DOOR |
1575 |
case DT_DOOR: ent->type = EIO_DT_DOOR; break; |
1576 |
#endif |
1577 |
#ifdef DT_WHT |
1578 |
case DT_WHT: ent->type = EIO_DT_WHT; break; |
1579 |
#endif |
1580 |
} |
1581 |
|
1582 |
ent->score = 7; |
1583 |
|
1584 |
if (flags & EIO_READDIR_DIRS_FIRST) |
1585 |
{ |
1586 |
if (ent->type == EIO_DT_UNKNOWN) |
1587 |
{ |
1588 |
if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ |
1589 |
ent->score = 1; |
1590 |
else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */ |
1591 |
ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */ |
1592 |
} |
1593 |
else if (ent->type == EIO_DT_DIR) |
1594 |
ent->score = 0; |
1595 |
} |
1596 |
} |
1597 |
|
1598 |
namesoffs += len; |
1599 |
++dentoffs; |
1600 |
} |
1601 |
|
1602 |
if (EIO_CANCELLED (req)) |
1603 |
{ |
1604 |
errno = ECANCELED; |
1605 |
break; |
1606 |
} |
1607 |
|
1608 |
#ifdef _WIN32 |
1609 |
if (!FindNextFile (dirp, &entp)) |
1610 |
{ |
1611 |
FindClose (dirp); |
1612 |
dirp = 0; |
1613 |
} |
1614 |
#endif |
1615 |
} |
1616 |
} |
1617 |
|
1618 |
/*****************************************************************************/ |
1619 |
/* working directory stuff */ |
1620 |
/* various deficiencies in the posix 2008 api force us to */ |
1621 |
/* keep the absolute path in string form at all times */ |
1622 |
/* fuck yeah. */ |
1623 |
|
1624 |
#if !HAVE_AT |
1625 |
|
1626 |
/* a bit like realpath, but usually faster because it doesn'T have to return */ |
1627 |
/* an absolute or canonical path */ |
1628 |
static const char * |
1629 |
wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) |
1630 |
{ |
1631 |
if (!wd || *path == '/') |
1632 |
return path; |
1633 |
|
1634 |
if (path [0] == '.' && !path [1]) |
1635 |
return wd->str; |
1636 |
|
1637 |
{ |
1638 |
int l1 = wd->len; |
1639 |
int l2 = strlen (path); |
1640 |
|
1641 |
char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2); |
1642 |
|
1643 |
memcpy (res, wd->str, l1); |
1644 |
res [l1] = '/'; |
1645 |
memcpy (res + l1 + 1, path, l2 + 1); |
1646 |
|
1647 |
return res; |
1648 |
} |
1649 |
} |
1650 |
|
1651 |
#endif |
1652 |
|
1653 |
static eio_wd |
1654 |
eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) |
1655 |
{ |
1656 |
int fd; |
1657 |
eio_wd res; |
1658 |
int len = eio__realpath (tmpbuf, wd, path); |
1659 |
|
1660 |
if (len < 0) |
1661 |
return EIO_INVALID_WD; |
1662 |
|
1663 |
#if HAVE_AT |
1664 |
fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY); |
1665 |
|
1666 |
if (fd < 0) |
1667 |
return EIO_INVALID_WD; |
1668 |
#endif |
1669 |
|
1670 |
res = malloc (sizeof (*res) + len); /* one extra 0-byte */ |
1671 |
|
1672 |
#if HAVE_AT |
1673 |
res->fd = fd; |
1674 |
#endif |
1675 |
|
1676 |
res->len = len; |
1677 |
memcpy (res->str, tmpbuf->ptr, len); |
1678 |
res->str [len] = 0; |
1679 |
|
1680 |
return res; |
1681 |
} |
1682 |
|
1683 |
eio_wd |
1684 |
eio_wd_open_sync (eio_wd wd, const char *path) |
1685 |
{ |
1686 |
struct etp_tmpbuf tmpbuf = { }; |
1687 |
wd = eio__wd_open_sync (&tmpbuf, wd, path); |
1688 |
free (tmpbuf.ptr); |
1689 |
|
1690 |
return wd; |
1691 |
} |
1692 |
|
1693 |
void |
1694 |
eio_wd_close_sync (eio_wd wd) |
1695 |
{ |
1696 |
if (wd != EIO_INVALID_WD && wd != EIO_CWD) |
1697 |
{ |
1698 |
#if HAVE_AT |
1699 |
eio__close (wd->fd); |
1700 |
#endif |
1701 |
free (wd); |
1702 |
} |
1703 |
} |
1704 |
|
1705 |
#if HAVE_AT |
1706 |
|
1707 |
static int |
1708 |
eio__renameat2 (int olddirfd, const char *oldpath, int newdirfd, const char *newpath, unsigned int flags) |
1709 |
{ |
1710 |
#if HAVE_RENAMEAT2 |
1711 |
return syscall (SYS_renameat2, olddirfd, oldpath, newdirfd, newpath, flags); |
1712 |
#else |
1713 |
if (flags) |
1714 |
return EIO_ENOSYS (); |
1715 |
|
1716 |
return renameat (olddirfd, oldpath, newdirfd, newpath); |
1717 |
#endif |
1718 |
} |
1719 |
|
1720 |
/* they forgot these */ |
1721 |
|
1722 |
static int |
1723 |
eio__truncateat (int dirfd, const char *path, off_t length) |
1724 |
{ |
1725 |
int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC); |
1726 |
int res; |
1727 |
|
1728 |
if (fd < 0) |
1729 |
return fd; |
1730 |
|
1731 |
res = ftruncate (fd, length); |
1732 |
silent_close (fd); |
1733 |
return res; |
1734 |
} |
1735 |
|
1736 |
static int |
1737 |
eio__statvfsat (int dirfd, const char *path, struct statvfs *buf) |
1738 |
{ |
1739 |
int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC); |
1740 |
int res; |
1741 |
|
1742 |
if (fd < 0) |
1743 |
return fd; |
1744 |
|
1745 |
res = fstatvfs (fd, buf); |
1746 |
silent_close (fd); |
1747 |
return res; |
1748 |
} |
1749 |
|
1750 |
#endif |
1751 |
|
1752 |
/*****************************************************************************/ |
1753 |
|
1754 |
#define ALLOC(len) \ |
1755 |
if (!req->ptr2) \ |
1756 |
{ \ |
1757 |
X_LOCK (EIO_POOL->wrklock); \ |
1758 |
req->flags |= EIO_FLAG_PTR2_FREE; \ |
1759 |
X_UNLOCK (EIO_POOL->wrklock); \ |
1760 |
req->ptr2 = malloc (len); \ |
1761 |
if (!req->ptr2) \ |
1762 |
{ \ |
1763 |
errno = ENOMEM; \ |
1764 |
req->result = -1; \ |
1765 |
goto alloc_fail; \ |
1766 |
} \ |
1767 |
} |
1768 |
|
1769 |
/*****************************************************************************/ |
1770 |
|
1771 |
static void |
1772 |
eio__slurp (int fd, eio_req *req) |
1773 |
{ |
1774 |
req->result = fd; |
1775 |
|
1776 |
if (fd < 0) |
1777 |
return; |
1778 |
|
1779 |
if (req->offs < 0 || !req->size) /* do we need the size? */ |
1780 |
{ |
1781 |
off_t size = lseek (fd, 0, SEEK_END); |
1782 |
|
1783 |
if (req->offs < 0) |
1784 |
req->offs += size; |
1785 |
|
1786 |
if (!req->size) |
1787 |
req->size = size - req->offs; |
1788 |
} |
1789 |
|
1790 |
ALLOC (req->size); |
1791 |
req->result = pread (fd, req->ptr2, req->size, req->offs); |
1792 |
|
1793 |
silent_close (fd); |
1794 |
|
1795 |
alloc_fail: |
1796 |
; |
1797 |
} |
1798 |
|
1799 |
int ecb_cold |
1800 |
eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
1801 |
{ |
1802 |
eio_want_poll_cb = want_poll; |
1803 |
eio_done_poll_cb = done_poll; |
1804 |
|
1805 |
return etp_init (EIO_POOL, 0, 0, 0); |
1806 |
} |
1807 |
|
1808 |
ecb_inline void |
1809 |
eio_api_destroy (eio_req *req) |
1810 |
{ |
1811 |
free (req); |
1812 |
} |
1813 |
|
1814 |
#define REQ(rtype) \ |
1815 |
eio_req *req; \ |
1816 |
\ |
1817 |
req = (eio_req *)calloc (1, sizeof *req); \ |
1818 |
if (!req) \ |
1819 |
return 0; \ |
1820 |
\ |
1821 |
req->type = rtype; \ |
1822 |
req->pri = pri; \ |
1823 |
req->finish = cb; \ |
1824 |
req->data = data; \ |
1825 |
req->destroy = eio_api_destroy; |
1826 |
|
1827 |
#define SEND eio_submit (req); return req |
1828 |
|
1829 |
#define PATH \ |
1830 |
req->flags |= EIO_FLAG_PTR1_FREE; \ |
1831 |
req->ptr1 = strdup (path); \ |
1832 |
if (!req->ptr1) \ |
1833 |
{ \ |
1834 |
eio_api_destroy (req); \ |
1835 |
return 0; \ |
1836 |
} |
1837 |
|
1838 |
#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)]) |
1839 |
|
1840 |
static void |
1841 |
eio_execute (etp_worker *self, eio_req *req) |
1842 |
{ |
1843 |
#if HAVE_AT |
1844 |
int dirfd; |
1845 |
#else |
1846 |
const char *path; |
1847 |
#endif |
1848 |
|
1849 |
if (ecb_expect_false (EIO_CANCELLED (req))) |
1850 |
{ |
1851 |
req->result = -1; |
1852 |
req->errorno = ECANCELED; |
1853 |
return; |
1854 |
} |
1855 |
|
1856 |
if (ecb_expect_false (req->wd == EIO_INVALID_WD)) |
1857 |
{ |
1858 |
req->result = -1; |
1859 |
req->errorno = ENOENT; |
1860 |
return; |
1861 |
} |
1862 |
|
1863 |
if (req->type >= EIO_OPEN) |
1864 |
{ |
1865 |
#if HAVE_AT |
1866 |
dirfd = WD2FD (req->wd); |
1867 |
#else |
1868 |
path = wd_expand (&self->tmpbuf, req->wd, req->ptr1); |
1869 |
#endif |
1870 |
} |
1871 |
|
1872 |
switch (req->type) |
1873 |
{ |
1874 |
case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1); |
1875 |
req->result = req->wd == EIO_INVALID_WD ? -1 : 0; |
1876 |
break; |
1877 |
case EIO_WD_CLOSE: req->result = 0; |
1878 |
eio_wd_close_sync (req->wd); break; |
1879 |
|
1880 |
case EIO_SEEK: eio__lseek (req); break; |
1881 |
case EIO_READ: ALLOC (req->size); |
1882 |
req->result = req->offs >= 0 |
1883 |
? pread (req->int1, req->ptr2, req->size, req->offs) |
1884 |
: read (req->int1, req->ptr2, req->size); break; |
1885 |
case EIO_WRITE: req->result = req->offs >= 0 |
1886 |
? pwrite (req->int1, req->ptr2, req->size, req->offs) |
1887 |
: write (req->int1, req->ptr2, req->size); break; |
1888 |
|
1889 |
case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break; |
1890 |
case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break; |
1891 |
|
1892 |
case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; |
1893 |
case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break; |
1894 |
|
1895 |
#if HAVE_AT |
1896 |
|
1897 |
case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
1898 |
req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break; |
1899 |
case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
1900 |
req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break; |
1901 |
case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break; |
1902 |
case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break; |
1903 |
case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break; |
1904 |
case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break; |
1905 |
case EIO_SLURP: eio__slurp ( openat (dirfd, req->ptr1, O_RDONLY | O_CLOEXEC), req); break; |
1906 |
|
1907 |
case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break; |
1908 |
case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */ |
1909 |
req->result = req->wd && SINGLEDOT (req->ptr1) |
1910 |
? rmdir (req->wd->str) |
1911 |
: unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break; |
1912 |
case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break; |
1913 |
case EIO_RENAME: req->result = eio__renameat2 ( |
1914 |
dirfd, |
1915 |
/* complications arise because "." cannot be renamed, so we might have to expand */ |
1916 |
req->wd && SINGLEDOT (req->ptr1) ? req->wd->str : req->ptr1, |
1917 |
WD2FD ((eio_wd)req->int3), |
1918 |
req->ptr2, |
1919 |
req->int2 |
1920 |
); |
1921 |
break; |
1922 |
case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break; |
1923 |
case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break; |
1924 |
case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; |
1925 |
case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
1926 |
req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
1927 |
case EIO_READLINK: ALLOC (EIO_PATH_MAX); |
1928 |
req->result = readlinkat (dirfd, req->ptr1, req->ptr2, EIO_PATH_MAX); |
1929 |
if (req->result == EIO_PATH_MAX) |
1930 |
{ |
1931 |
req->result = -1; |
1932 |
errno = ENAMETOOLONG; |
1933 |
} |
1934 |
break; |
1935 |
case EIO_UTIME: |
1936 |
case EIO_FUTIME: |
1937 |
{ |
1938 |
struct timespec ts[2]; |
1939 |
struct timespec *times; |
1940 |
|
1941 |
if (req->nv1 != -1. || req->nv2 != -1.) |
1942 |
{ |
1943 |
ts[0].tv_sec = req->nv1; |
1944 |
ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9; |
1945 |
ts[1].tv_sec = req->nv2; |
1946 |
ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9; |
1947 |
|
1948 |
times = ts; |
1949 |
} |
1950 |
else |
1951 |
times = 0; |
1952 |
|
1953 |
req->result = req->type == EIO_FUTIME |
1954 |
? futimens (req->int1, times) |
1955 |
: utimensat (dirfd, req->ptr1, times, 0); |
1956 |
} |
1957 |
break; |
1958 |
|
1959 |
#else |
1960 |
|
1961 |
case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
1962 |
req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break; |
1963 |
case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
1964 |
req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break; |
1965 |
case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break; |
1966 |
case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break; |
1967 |
case EIO_TRUNCATE: req->result = truncate (path , req->offs); break; |
1968 |
case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break; |
1969 |
case EIO_SLURP: eio__slurp ( open (path , O_RDONLY | O_CLOEXEC), req); break; |
1970 |
|
1971 |
case EIO_UNLINK: req->result = unlink (path ); break; |
1972 |
case EIO_RMDIR: req->result = rmdir (path ); break; |
1973 |
case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break; |
1974 |
case EIO_RENAME: req->result = req->int2 ? EIO_ENOSYS () : rename (path, req->ptr2); break; |
1975 |
case EIO_LINK: req->result = link (path , req->ptr2); break; |
1976 |
case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break; |
1977 |
case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break; |
1978 |
case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
1979 |
req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break; |
1980 |
case EIO_READLINK: ALLOC (EIO_PATH_MAX); |
1981 |
req->result = readlink (path, req->ptr2, EIO_PATH_MAX); |
1982 |
if (req->result == EIO_PATH_MAX) |
1983 |
{ |
1984 |
req->result = -1; |
1985 |
errno = ENAMETOOLONG; |
1986 |
} |
1987 |
break; |
1988 |
|
1989 |
case EIO_UTIME: |
1990 |
case EIO_FUTIME: |
1991 |
{ |
1992 |
struct timeval tv[2]; |
1993 |
struct timeval *times; |
1994 |
|
1995 |
if (req->nv1 != -1. || req->nv2 != -1.) |
1996 |
{ |
1997 |
tv[0].tv_sec = req->nv1; |
1998 |
tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6; |
1999 |
tv[1].tv_sec = req->nv2; |
2000 |
tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6; |
2001 |
|
2002 |
times = tv; |
2003 |
} |
2004 |
else |
2005 |
times = 0; |
2006 |
|
2007 |
req->result = req->type == EIO_FUTIME |
2008 |
? futimes (req->int1, times) |
2009 |
: utimes (req->ptr1, times); |
2010 |
} |
2011 |
break; |
2012 |
|
2013 |
#endif |
2014 |
|
2015 |
case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1))) |
2016 |
{ |
2017 |
ALLOC (req->result); |
2018 |
memcpy (req->ptr2, self->tmpbuf.ptr, req->result); |
2019 |
} |
2020 |
break; |
2021 |
|
2022 |
case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
2023 |
req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; |
2024 |
|
2025 |
case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
2026 |
req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
2027 |
|
2028 |
case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
2029 |
case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
2030 |
case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; |
2031 |
|
2032 |
case EIO_CLOSE: req->result = eio__close (req->int1); break; |
2033 |
case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; |
2034 |
case EIO_SYNC: req->result = 0; sync (); break; |
2035 |
case EIO_FSYNC: req->result = fsync (req->int1); break; |
2036 |
case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
2037 |
case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; |
2038 |
case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; |
2039 |
case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break; |
2040 |
case EIO_MTOUCH: req->result = eio__mtouch (req); break; |
2041 |
case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break; |
2042 |
case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break; |
2043 |
case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break; |
2044 |
|
2045 |
case EIO_READDIR: eio__scandir (req, self); break; |
2046 |
|
2047 |
case EIO_BUSY: |
2048 |
#ifdef _WIN32 |
2049 |
Sleep (req->nv1 * 1e3); |
2050 |
#else |
2051 |
{ |
2052 |
struct timeval tv; |
2053 |
|
2054 |
tv.tv_sec = req->nv1; |
2055 |
tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6; |
2056 |
|
2057 |
req->result = select (0, 0, 0, 0, &tv); |
2058 |
} |
2059 |
#endif |
2060 |
break; |
2061 |
|
2062 |
#if 0 |
2063 |
case EIO_GROUP: |
2064 |
abort (); /* handled in eio_request */ |
2065 |
#endif |
2066 |
|
2067 |
case EIO_NOP: |
2068 |
req->result = 0; |
2069 |
break; |
2070 |
|
2071 |
case EIO_CUSTOM: |
2072 |
req->feed (req); |
2073 |
break; |
2074 |
|
2075 |
default: |
2076 |
req->result = EIO_ENOSYS (); |
2077 |
break; |
2078 |
} |
2079 |
|
2080 |
alloc_fail: |
2081 |
req->errorno = errno; |
2082 |
} |
2083 |
|
2084 |
#ifndef EIO_NO_WRAPPERS |
2085 |
|
2086 |
eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data) |
2087 |
{ |
2088 |
REQ (EIO_WD_OPEN); PATH; SEND; |
2089 |
} |
2090 |
|
2091 |
eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data) |
2092 |
{ |
2093 |
REQ (EIO_WD_CLOSE); req->wd = wd; SEND; |
2094 |
} |
2095 |
|
2096 |
eio_req *eio_nop (int pri, eio_cb cb, void *data) |
2097 |
{ |
2098 |
REQ (EIO_NOP); SEND; |
2099 |
} |
2100 |
|
2101 |
eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data) |
2102 |
{ |
2103 |
REQ (EIO_BUSY); req->nv1 = delay; SEND; |
2104 |
} |
2105 |
|
2106 |
eio_req *eio_sync (int pri, eio_cb cb, void *data) |
2107 |
{ |
2108 |
REQ (EIO_SYNC); SEND; |
2109 |
} |
2110 |
|
2111 |
eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data) |
2112 |
{ |
2113 |
REQ (EIO_FSYNC); req->int1 = fd; SEND; |
2114 |
} |
2115 |
|
2116 |
eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) |
2117 |
{ |
2118 |
REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; |
2119 |
} |
2120 |
|
2121 |
eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) |
2122 |
{ |
2123 |
REQ (EIO_FDATASYNC); req->int1 = fd; SEND; |
2124 |
} |
2125 |
|
2126 |
eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data) |
2127 |
{ |
2128 |
REQ (EIO_SYNCFS); req->int1 = fd; SEND; |
2129 |
} |
2130 |
|
2131 |
eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) |
2132 |
{ |
2133 |
REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; |
2134 |
} |
2135 |
|
2136 |
eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) |
2137 |
{ |
2138 |
REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; |
2139 |
} |
2140 |
|
2141 |
eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) |
2142 |
{ |
2143 |
REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND; |
2144 |
} |
2145 |
|
2146 |
eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data) |
2147 |
{ |
2148 |
REQ (EIO_MLOCKALL); req->int1 = flags; SEND; |
2149 |
} |
2150 |
|
2151 |
eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data) |
2152 |
{ |
2153 |
REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND; |
2154 |
} |
2155 |
|
2156 |
eio_req *eio_close (int fd, int pri, eio_cb cb, void *data) |
2157 |
{ |
2158 |
REQ (EIO_CLOSE); req->int1 = fd; SEND; |
2159 |
} |
2160 |
|
2161 |
eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data) |
2162 |
{ |
2163 |
REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; |
2164 |
} |
2165 |
|
2166 |
eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data) |
2167 |
{ |
2168 |
REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND; |
2169 |
} |
2170 |
|
2171 |
eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
2172 |
{ |
2173 |
REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
2174 |
} |
2175 |
|
2176 |
eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
2177 |
{ |
2178 |
REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
2179 |
} |
2180 |
|
2181 |
eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data) |
2182 |
{ |
2183 |
REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND; |
2184 |
} |
2185 |
|
2186 |
eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data) |
2187 |
{ |
2188 |
REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND; |
2189 |
} |
2190 |
|
2191 |
eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) |
2192 |
{ |
2193 |
REQ (EIO_FSTAT); req->int1 = fd; SEND; |
2194 |
} |
2195 |
|
2196 |
eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) |
2197 |
{ |
2198 |
REQ (EIO_FSTATVFS); req->int1 = fd; SEND; |
2199 |
} |
2200 |
|
2201 |
eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) |
2202 |
{ |
2203 |
REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; |
2204 |
} |
2205 |
|
2206 |
eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data) |
2207 |
{ |
2208 |
REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND; |
2209 |
} |
2210 |
|
2211 |
eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) |
2212 |
{ |
2213 |
REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; |
2214 |
} |
2215 |
|
2216 |
eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) |
2217 |
{ |
2218 |
REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
2219 |
} |
2220 |
|
2221 |
eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) |
2222 |
{ |
2223 |
REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND; |
2224 |
} |
2225 |
|
2226 |
eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data) |
2227 |
{ |
2228 |
REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND; |
2229 |
} |
2230 |
|
2231 |
eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data) |
2232 |
{ |
2233 |
REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND; |
2234 |
} |
2235 |
|
2236 |
eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data) |
2237 |
{ |
2238 |
REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND; |
2239 |
} |
2240 |
|
2241 |
eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) |
2242 |
{ |
2243 |
REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; |
2244 |
} |
2245 |
|
2246 |
eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) |
2247 |
{ |
2248 |
REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
2249 |
} |
2250 |
|
2251 |
eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
2252 |
{ |
2253 |
REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND; |
2254 |
} |
2255 |
|
2256 |
eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
2257 |
{ |
2258 |
REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND; |
2259 |
} |
2260 |
|
2261 |
static eio_req * |
2262 |
eio__1path (int type, const char *path, int pri, eio_cb cb, void *data) |
2263 |
{ |
2264 |
REQ (type); PATH; SEND; |
2265 |
} |
2266 |
|
2267 |
eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) |
2268 |
{ |
2269 |
return eio__1path (EIO_READLINK, path, pri, cb, data); |
2270 |
} |
2271 |
|
2272 |
eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data) |
2273 |
{ |
2274 |
return eio__1path (EIO_REALPATH, path, pri, cb, data); |
2275 |
} |
2276 |
|
2277 |
eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) |
2278 |
{ |
2279 |
return eio__1path (EIO_STAT, path, pri, cb, data); |
2280 |
} |
2281 |
|
2282 |
eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) |
2283 |
{ |
2284 |
return eio__1path (EIO_LSTAT, path, pri, cb, data); |
2285 |
} |
2286 |
|
2287 |
eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data) |
2288 |
{ |
2289 |
return eio__1path (EIO_STATVFS, path, pri, cb, data); |
2290 |
} |
2291 |
|
2292 |
eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) |
2293 |
{ |
2294 |
return eio__1path (EIO_UNLINK, path, pri, cb, data); |
2295 |
} |
2296 |
|
2297 |
eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data) |
2298 |
{ |
2299 |
return eio__1path (EIO_RMDIR, path, pri, cb, data); |
2300 |
} |
2301 |
|
2302 |
eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data) |
2303 |
{ |
2304 |
REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; |
2305 |
} |
2306 |
|
2307 |
eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) |
2308 |
{ |
2309 |
REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND; |
2310 |
} |
2311 |
|
2312 |
static eio_req * |
2313 |
eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2314 |
{ |
2315 |
REQ (type); PATH; |
2316 |
|
2317 |
req->flags |= EIO_FLAG_PTR2_FREE; |
2318 |
req->ptr2 = strdup (new_path); |
2319 |
if (!req->ptr2) |
2320 |
{ |
2321 |
eio_api_destroy (req); |
2322 |
return 0; |
2323 |
} |
2324 |
|
2325 |
SEND; |
2326 |
} |
2327 |
|
2328 |
eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2329 |
{ |
2330 |
return eio__2path (EIO_LINK, path, new_path, pri, cb, data); |
2331 |
} |
2332 |
|
2333 |
eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2334 |
{ |
2335 |
return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data); |
2336 |
} |
2337 |
|
2338 |
eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2339 |
{ |
2340 |
return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
2341 |
} |
2342 |
|
2343 |
eio_req *eio_slurp (const char *path, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
2344 |
{ |
2345 |
REQ (EIO_SLURP); PATH; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
2346 |
} |
2347 |
|
2348 |
eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) |
2349 |
{ |
2350 |
REQ (EIO_CUSTOM); req->feed = execute; SEND; |
2351 |
} |
2352 |
|
2353 |
#endif |
2354 |
|
2355 |
eio_req *eio_grp (eio_cb cb, void *data) |
2356 |
{ |
2357 |
const int pri = EIO_PRI_MAX; |
2358 |
|
2359 |
REQ (EIO_GROUP); SEND; |
2360 |
} |
2361 |
|
2362 |
#undef REQ |
2363 |
#undef PATH |
2364 |
#undef SEND |
2365 |
|
2366 |
/*****************************************************************************/ |
2367 |
/* grp functions */ |
2368 |
|
2369 |
void |
2370 |
eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) |
2371 |
{ |
2372 |
grp->int2 = limit; |
2373 |
grp->feed = feed; |
2374 |
|
2375 |
grp_try_feed (grp); |
2376 |
} |
2377 |
|
2378 |
void |
2379 |
eio_grp_limit (eio_req *grp, int limit) |
2380 |
{ |
2381 |
grp->int2 = limit; |
2382 |
|
2383 |
grp_try_feed (grp); |
2384 |
} |
2385 |
|
2386 |
void |
2387 |
eio_grp_add (eio_req *grp, eio_req *req) |
2388 |
{ |
2389 |
assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); |
2390 |
|
2391 |
grp->flags |= ETP_FLAG_GROUPADD; |
2392 |
|
2393 |
++grp->size; |
2394 |
req->grp = grp; |
2395 |
|
2396 |
req->grp_prev = 0; |
2397 |
req->grp_next = grp->grp_first; |
2398 |
|
2399 |
if (grp->grp_first) |
2400 |
grp->grp_first->grp_prev = req; |
2401 |
|
2402 |
grp->grp_first = req; |
2403 |
} |
2404 |
|
2405 |
/*****************************************************************************/ |
2406 |
/* misc garbage */ |
2407 |
|
2408 |
eio_ssize_t |
2409 |
eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) |
2410 |
{ |
2411 |
return eio__sendfile (ofd, ifd, offset, count); |
2412 |
} |
2413 |
|