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Comparing libeio/eio.c (file contents):
Revision 1.93 by root, Mon Jul 18 01:27:03 2011 UTC vs.
Revision 1.133 by root, Thu Jun 25 13:42:18 2015 UTC

1	/*	1	/*
2	* libeio implementation	2	* libeio implementation
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libeio@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
10	* 1. Redistributions of source code must retain the above copyright notice,	10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.	11	* this list of conditions and the following disclaimer.
12	*	12	*
13	* 2. Redistributions in binary form must reproduce the above copyright	13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the	14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.	15	* documentation and/or other materials provided with the distribution.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED	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-	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO	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-	20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,	21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
…		…
43		43
44	#include "eio.h"	44	#include "eio.h"
45	#include "ecb.h"	45	#include "ecb.h"
46		46
47	#ifdef EIO_STACKSIZE	47	#ifdef EIO_STACKSIZE
48	# define XTHREAD_STACKSIZE EIO_STACKSIZE	48	# define X_STACKSIZE EIO_STACKSIZE
49	#endif	49	#endif
50	#include "xthread.h"	50	#include "xthread.h"
51		51
52	#include <errno.h>	52	#include <errno.h>
53	#include <stddef.h>	53	#include <stddef.h>
…		…
71	#endif	71	#endif
72	#ifndef ELOOP	72	#ifndef ELOOP
73	# define ELOOP EDOM	73	# define ELOOP EDOM
74	#endif	74	#endif
75		75
		76	#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
		77	# define ENOTSOCK WSAENOTSOCK
		78	#endif
		79
76	static void eio_destroy (eio_req *req);	80	static void eio_destroy (eio_req *req);
77		81
78	#ifndef EIO_FINISH	82	#ifndef EIO_FINISH
79	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	83	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
80	#endif	84	#endif
…		…
101	#ifdef _WIN32	105	#ifdef _WIN32
102		106
103	#undef PAGESIZE	107	#undef PAGESIZE
104	#define PAGESIZE 4096 /* GetSystemInfo? */	108	#define PAGESIZE 4096 /* GetSystemInfo? */
105		109
		110	/* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
		111
106	#ifdef EIO_STRUCT_STATI64	112	#ifdef EIO_STRUCT_STATI64
		113	/* look at perl's non-sloppy stat */
107	#define stat(path,buf) _stati64 (path,buf)	114	#define stat(path,buf) _stati64 (path,buf)
108	#define fstat(fd,buf) _fstati64 (path,buf)	115	#define fstat(fd,buf) _fstati64 (fd,buf)
109	#endif	116	#endif
110	#define lstat(path,buf) stat (path,buf)	117	#define lstat(path,buf) stat (path,buf)
111	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))	118	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
112	#define mkdir(path,mode) _mkdir (path)	119	#define mkdir(path,mode) _mkdir (path)
113	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))	120	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
114		121
115	#define chmod(path,mode) _chmod (path, mode)	122	#define chmod(path,mode) _chmod (path, mode)
116	#define dup(fd) _dup (fd)	123	#define dup(fd) _dup (fd)
117	#define dup2(fd1,fd2) _dup2 (fd1, fd2)	124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		125	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
118		126
119	#define fchmod(fd,mode) EIO_ENOSYS ()	127	#define fchmod(fd,mode) EIO_ENOSYS ()
120	#define chown(path,uid,gid) EIO_ENOSYS ()	128	#define chown(path,uid,gid) EIO_ENOSYS ()
121	#define fchown(fd,uid,gid) EIO_ENOSYS ()	129	#define fchown(fd,uid,gid) EIO_ENOSYS ()
122	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */	130	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
…		…
125	#define sync() EIO_ENOSYS ()	133	#define sync() EIO_ENOSYS ()
126	#define readlink(path,buf,s) EIO_ENOSYS ()	134	#define readlink(path,buf,s) EIO_ENOSYS ()
127	#define statvfs(path,buf) EIO_ENOSYS ()	135	#define statvfs(path,buf) EIO_ENOSYS ()
128	#define fstatvfs(fd,buf) EIO_ENOSYS ()	136	#define fstatvfs(fd,buf) EIO_ENOSYS ()
129		137
		138	#define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
		139	#define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
		140
		141	#if __GNUC__
		142	typedef long long eio_off_t; /* signed for compatibility to msvc */
		143	#else
		144	typedef __int64 eio_off_t; /* unsigned not supported by msvc */
		145	#endif
		146
		147	static eio_ssize_t
		148	eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		149	{
		150	OVERLAPPED o = { 0 };
		151	DWORD got;
		152
		153	o.Offset = offset;
		154	o.OffsetHigh = offset >> 32;
		155
		156	return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		157	? got : -1;
		158	}
		159
		160	static eio_ssize_t
		161	eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		162	{
		163	OVERLAPPED o = { 0 };
		164	DWORD got;
		165
		166	o.Offset = offset;
		167	o.OffsetHigh = offset >> 32;
		168
		169	return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		170	? got : -1;
		171	}
		172
		173	/* rename() uses MoveFile, which fails to overwrite */
		174	#define rename(old,neu) eio__rename (old, neu)
		175
		176	static int
		177	eio__rename (const char *old, const char *neu)
		178	{
		179	if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
		180	return 0;
		181
		182	/* should steal _dosmaperr */
		183	switch (GetLastError ())
		184	{
		185	case ERROR_FILE_NOT_FOUND:
		186	case ERROR_PATH_NOT_FOUND:
		187	case ERROR_INVALID_DRIVE:
		188	case ERROR_NO_MORE_FILES:
		189	case ERROR_BAD_NETPATH:
		190	case ERROR_BAD_NET_NAME:
		191	case ERROR_BAD_PATHNAME:
		192	case ERROR_FILENAME_EXCED_RANGE:
		193	errno = ENOENT;
		194	break;
		195
		196	default:
		197	errno = EACCES;
		198	break;
		199	}
		200
		201	return -1;
		202	}
		203
130	/* we could even stat and see if it exists */	204	/* we could even stat and see if it exists */
131	static int	205	static int
132	symlink (const char *old, const char *neu)	206	symlink (const char *old, const char *neu)
133	{	207	{
134	#if WINVER >= 0x0600	208	#if WINVER >= 0x0600
…		…
140	#endif	214	#endif
141		215
142	return EIO_ERRNO (ENOENT, -1);	216	return EIO_ERRNO (ENOENT, -1);
143	}	217	}
144		218
145	/* POSIX API only */	219	/* POSIX API only, causing trouble for win32 apps */
146	#define CreateHardLink(neu,old,flags) 0	220	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
147	#define CreateSymbolicLink(neu,old,flags) 0	221	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
148		222
149	struct statvfs	223	struct statvfs
150	{	224	{
151	int dummy;	225	int dummy;
152	};	226	};
…		…
158		232
159	#else	233	#else
160		234
161	#include <sys/time.h>	235	#include <sys/time.h>
162	#include <sys/select.h>	236	#include <sys/select.h>
163	#include <sys/statvfs.h>
164	#include <unistd.h>	237	#include <unistd.h>
165	#include <utime.h>
166	#include <signal.h>	238	#include <signal.h>
167	#include <dirent.h>	239	#include <dirent.h>
		240
		241	#ifdef ANDROID
		242	#include <sys/vfs.h>
		243	#define statvfs statfs
		244	#define fstatvfs fstatfs
		245	#include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
		246	#else
		247	#include <sys/statvfs.h>
		248	#endif
168		249
169	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	250	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
170	#include <sys/mman.h>	251	#include <sys/mman.h>
171	#endif	252	#endif
172		253
173	#define D_NAME(entp) entp->d_name	254	#define D_NAME(entp) entp->d_name
174		255
175	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	256	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
176	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	257	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
177	#define _DIRENT_HAVE_D_TYPE /* sigh */	258	#define _DIRENT_HAVE_D_TYPE /* sigh */
178	#define D_INO(de) (de)->d_fileno	259	#define D_INO(de) (de)->d_fileno
179	#define D_NAMLEN(de) (de)->d_namlen	260	#define D_NAMLEN(de) (de)->d_namlen
180	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	261	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
181	#define D_INO(de) (de)->d_ino	262	#define D_INO(de) (de)->d_ino
…		…
192		273
193	#ifndef EIO_STRUCT_DIRENT	274	#ifndef EIO_STRUCT_DIRENT
194	#define EIO_STRUCT_DIRENT struct dirent	275	#define EIO_STRUCT_DIRENT struct dirent
195	#endif	276	#endif
196		277
		278	#endif
		279
		280	#if HAVE_UTIMES
		281	# include <utime.h>
		282	#endif
		283
		284	#if HAVE_SYS_SYSCALL_H
		285	# include <sys/syscall.h>
		286	#endif
		287
		288	#if HAVE_SYS_PRCTL_H
		289	# include <sys/prctl.h>
197	#endif	290	#endif
198		291
199	#if HAVE_SENDFILE	292	#if HAVE_SENDFILE
200	# if __linux	293	# if __linux
201	# include <sys/sendfile.h>	294	# include <sys/sendfile.h>
…		…
232	#endif	325	#endif
233		326
234	/* buffer size for various temporary buffers */	327	/* buffer size for various temporary buffers */
235	#define EIO_BUFSIZE 65536	328	#define EIO_BUFSIZE 65536
236		329
237	#define dBUF \	330	#define dBUF \
238	char *eio_buf; \
239	ETP_WORKER_LOCK (self); \
240	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	331	char *eio_buf = malloc (EIO_BUFSIZE); \
241	ETP_WORKER_UNLOCK (self); \
242	errno = ENOMEM; \	332	errno = ENOMEM; \
243	if (!eio_buf) \	333	if (!eio_buf) \
244	return -1;	334	return -1
245		335
246	#define EIO_TICKS ((1000000 + 1023) >> 10)	336	#define FUBd \
		337	free (eio_buf)
		338
		339	/*****************************************************************************/
		340
		341	struct tmpbuf
		342	{
		343	void *ptr;
		344	int len;
		345	};
		346
		347	static void *
		348	tmpbuf_get (struct tmpbuf *buf, int len)
		349	{
		350	if (buf->len < len)
		351	{
		352	free (buf->ptr);
		353	buf->ptr = malloc (buf->len = len);
		354	}
		355
		356	return buf->ptr;
		357	}
		358
		359	struct tmpbuf;
		360
		361	#if _POSIX_VERSION >= 200809L
		362	#define HAVE_AT 1
		363	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
		364	#ifndef O_SEARCH
		365	#define O_SEARCH O_RDONLY
		366	#endif
		367	#else
		368	#define HAVE_AT 0
		369	static const char *wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path);
		370	#endif
		371
		372	struct eio_pwd
		373	{
		374	#if HAVE_AT
		375	int fd;
		376	#endif
		377	int len;
		378	char str[1]; /* actually, a 0-terminated canonical path */
		379	};
		380
		381	/*****************************************************************************/
247		382
248	#define ETP_PRI_MIN EIO_PRI_MIN	383	#define ETP_PRI_MIN EIO_PRI_MIN
249	#define ETP_PRI_MAX EIO_PRI_MAX	384	#define ETP_PRI_MAX EIO_PRI_MAX
		385
		386	#define ETP_TYPE_QUIT -1
		387	#define ETP_TYPE_GROUP EIO_GROUP
250		388
251	struct etp_worker;	389	struct etp_worker;
252		390
253	#define ETP_REQ eio_req	391	#define ETP_REQ eio_req
254	#define ETP_DESTROY(req) eio_destroy (req)	392	#define ETP_DESTROY(req) eio_destroy (req)
255	static int eio_finish (eio_req *req);	393	static int eio_finish (eio_req *req);
256	#define ETP_FINISH(req) eio_finish (req)	394	#define ETP_FINISH(req) eio_finish (req)
257	static void eio_execute (struct etp_worker *self, eio_req *req);	395	static void eio_execute (struct etp_worker *self, eio_req *req);
258	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	396	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
259		397
260	#define ETP_WORKER_CLEAR(req) \	398	#include "etp.c"
261	if (wrk->dbuf) \
262	{ \
263	free (wrk->dbuf); \
264	wrk->dbuf = 0; \
265	}
266
267	#define ETP_WORKER_COMMON \
268	void *dbuf;
269
270	/*****************************************************************************/
271
272	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
273
274	/* calculate time difference in ~1/EIO_TICKS of a second */
275	ecb_inline int
276	tvdiff (struct timeval *tv1, struct timeval *tv2)
277	{
278	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
279	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
280	}
281
282	static unsigned int started, idle, wanted = 4;
283
284	static void (*want_poll_cb) (void);
285	static void (*done_poll_cb) (void);
286
287	static unsigned int max_poll_time; /* reslock */
288	static unsigned int max_poll_reqs; /* reslock */
289
290	static volatile unsigned int nreqs; /* reqlock */
291	static volatile unsigned int nready; /* reqlock */
292	static volatile unsigned int npending; /* reqlock */
293	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
294	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
295
296	static xmutex_t wrklock;
297	static xmutex_t reslock;
298	static xmutex_t reqlock;
299	static xcond_t reqwait;
300
301	#if !HAVE_PREADWRITE
302	/*
303	* make our pread/pwrite emulation safe against themselves, but not against
304	* normal read/write by using a mutex. slows down execution a lot,
305	* but that's your problem, not mine.
306	*/
307	static xmutex_t preadwritelock;
308	#endif
309
310	typedef struct etp_worker
311	{
312	/* locked by wrklock */
313	struct etp_worker *prev, *next;
314
315	xthread_t tid;
316
317	/* locked by reslock, reqlock or wrklock */
318	ETP_REQ *req; /* currently processed request */
319
320	ETP_WORKER_COMMON
321	} etp_worker;
322
323	static etp_worker wrk_first; /* NOT etp */
324
325	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
326	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
327
328	/* worker threads management */
329
330	static void ecb_cold
331	etp_worker_clear (etp_worker *wrk)
332	{
333	ETP_WORKER_CLEAR (wrk);
334	}
335
336	static void ecb_cold
337	etp_worker_free (etp_worker *wrk)
338	{
339	wrk->next->prev = wrk->prev;
340	wrk->prev->next = wrk->next;
341
342	free (wrk);
343	}
344
345	static unsigned int
346	etp_nreqs (void)
347	{
348	int retval;
349	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
350	retval = nreqs;
351	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
352	return retval;
353	}
354
355	static unsigned int
356	etp_nready (void)
357	{
358	unsigned int retval;
359
360	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
361	retval = nready;
362	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
363
364	return retval;
365	}
366
367	static unsigned int
368	etp_npending (void)
369	{
370	unsigned int retval;
371
372	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
373	retval = npending;
374	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
375
376	return retval;
377	}
378
379	static unsigned int
380	etp_nthreads (void)
381	{
382	unsigned int retval;
383
384	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
385	retval = started;
386	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
387
388	return retval;
389	}
390
391	/*
392	* a somewhat faster data structure might be nice, but
393	* with 8 priorities this actually needs <20 insns
394	* per shift, the most expensive operation.
395	*/
396	typedef struct {
397	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
398	int size;
399	} etp_reqq;
400
401	static etp_reqq req_queue;
402	static etp_reqq res_queue;
403
404	static void ecb_noinline ecb_cold
405	reqq_init (etp_reqq *q)
406	{
407	int pri;
408
409	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
410	q->qs[pri] = q->qe[pri] = 0;
411
412	q->size = 0;
413	}
414
415	static int ecb_noinline
416	reqq_push (etp_reqq *q, ETP_REQ *req)
417	{
418	int pri = req->pri;
419	req->next = 0;
420
421	if (q->qe[pri])
422	{
423	q->qe[pri]->next = req;
424	q->qe[pri] = req;
425	}
426	else
427	q->qe[pri] = q->qs[pri] = req;
428
429	return q->size++;
430	}
431
432	static ETP_REQ * ecb_noinline
433	reqq_shift (etp_reqq *q)
434	{
435	int pri;
436
437	if (!q->size)
438	return 0;
439
440	--q->size;
441
442	for (pri = ETP_NUM_PRI; pri--; )
443	{
444	eio_req *req = q->qs[pri];
445
446	if (req)
447	{
448	if (!(q->qs[pri] = (eio_req *)req->next))
449	q->qe[pri] = 0;
450
451	return req;
452	}
453	}
454
455	abort ();
456	}
457
458	static int ecb_cold
459	etp_init (void (*want_poll)(void), void (*done_poll)(void))
460	{
461	X_MUTEX_CREATE (wrklock);
462	X_MUTEX_CREATE (reslock);
463	X_MUTEX_CREATE (reqlock);
464	X_COND_CREATE (reqwait);
465
466	reqq_init (&req_queue);
467	reqq_init (&res_queue);
468
469	wrk_first.next =
470	wrk_first.prev = &wrk_first;
471
472	started = 0;
473	idle = 0;
474	nreqs = 0;
475	nready = 0;
476	npending = 0;
477
478	want_poll_cb = want_poll;
479	done_poll_cb = done_poll;
480
481	return 0;
482	}
483
484	X_THREAD_PROC (etp_proc);
485
486	static void ecb_cold
487	etp_start_thread (void)
488	{
489	etp_worker *wrk = calloc (1, sizeof (etp_worker));
490
491	/*TODO*/
492	assert (("unable to allocate worker thread data", wrk));
493
494	X_LOCK (wrklock);
495
496	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
497	{
498	wrk->prev = &wrk_first;
499	wrk->next = wrk_first.next;
500	wrk_first.next->prev = wrk;
501	wrk_first.next = wrk;
502	++started;
503	}
504	else
505	free (wrk);
506
507	X_UNLOCK (wrklock);
508	}
509
510	static void
511	etp_maybe_start_thread (void)
512	{
513	if (ecb_expect_true (etp_nthreads () >= wanted))
514	return;
515
516	/* todo: maybe use idle here, but might be less exact */
517	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
518	return;
519
520	etp_start_thread ();
521	}
522
523	static void ecb_cold
524	etp_end_thread (void)
525	{
526	eio_req *req = calloc (1, sizeof (eio_req));
527
528	req->type = -1;
529	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
530
531	X_LOCK (reqlock);
532	reqq_push (&req_queue, req);
533	X_COND_SIGNAL (reqwait);
534	X_UNLOCK (reqlock);
535
536	X_LOCK (wrklock);
537	--started;
538	X_UNLOCK (wrklock);
539	}
540
541	static int
542	etp_poll (void)
543	{
544	unsigned int maxreqs;
545	unsigned int maxtime;
546	struct timeval tv_start, tv_now;
547
548	X_LOCK (reslock);
549	maxreqs = max_poll_reqs;
550	maxtime = max_poll_time;
551	X_UNLOCK (reslock);
552
553	if (maxtime)
554	gettimeofday (&tv_start, 0);
555
556	for (;;)
557	{
558	ETP_REQ *req;
559
560	etp_maybe_start_thread ();
561
562	X_LOCK (reslock);
563	req = reqq_shift (&res_queue);
564
565	if (req)
566	{
567	--npending;
568
569	if (!res_queue.size && done_poll_cb)
570	done_poll_cb ();
571	}
572
573	X_UNLOCK (reslock);
574
575	if (!req)
576	return 0;
577
578	X_LOCK (reqlock);
579	--nreqs;
580	X_UNLOCK (reqlock);
581
582	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
583	{
584	req->int1 = 1; /* mark request as delayed */
585	continue;
586	}
587	else
588	{
589	int res = ETP_FINISH (req);
590	if (ecb_expect_false (res))
591	return res;
592	}
593
594	if (ecb_expect_false (maxreqs && !--maxreqs))
595	break;
596
597	if (maxtime)
598	{
599	gettimeofday (&tv_now, 0);
600
601	if (tvdiff (&tv_start, &tv_now) >= maxtime)
602	break;
603	}
604	}
605
606	errno = EAGAIN;
607	return -1;
608	}
609
610	static void
611	etp_cancel (ETP_REQ *req)
612	{
613	req->cancelled = 1;
614
615	eio_grp_cancel (req);
616	}
617
618	static void
619	etp_submit (ETP_REQ *req)
620	{
621	req->pri -= ETP_PRI_MIN;
622
623	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
624	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
625
626	if (ecb_expect_false (req->type == EIO_GROUP))
627	{
628	/* I hope this is worth it :/ */
629	X_LOCK (reqlock);
630	++nreqs;
631	X_UNLOCK (reqlock);
632
633	X_LOCK (reslock);
634
635	++npending;
636
637	if (!reqq_push (&res_queue, req) && want_poll_cb)
638	want_poll_cb ();
639
640	X_UNLOCK (reslock);
641	}
642	else
643	{
644	X_LOCK (reqlock);
645	++nreqs;
646	++nready;
647	reqq_push (&req_queue, req);
648	X_COND_SIGNAL (reqwait);
649	X_UNLOCK (reqlock);
650
651	etp_maybe_start_thread ();
652	}
653	}
654
655	static void ecb_cold
656	etp_set_max_poll_time (double nseconds)
657	{
658	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
659	max_poll_time = nseconds * EIO_TICKS;
660	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
661	}
662
663	static void ecb_cold
664	etp_set_max_poll_reqs (unsigned int maxreqs)
665	{
666	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
667	max_poll_reqs = maxreqs;
668	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
669	}
670
671	static void ecb_cold
672	etp_set_max_idle (unsigned int nthreads)
673	{
674	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
675	max_idle = nthreads;
676	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
677	}
678
679	static void ecb_cold
680	etp_set_idle_timeout (unsigned int seconds)
681	{
682	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
683	idle_timeout = seconds;
684	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
685	}
686
687	static void ecb_cold
688	etp_set_min_parallel (unsigned int nthreads)
689	{
690	if (wanted < nthreads)
691	wanted = nthreads;
692	}
693
694	static void ecb_cold
695	etp_set_max_parallel (unsigned int nthreads)
696	{
697	if (wanted > nthreads)
698	wanted = nthreads;
699
700	while (started > wanted)
701	etp_end_thread ();
702	}
703		399
704	/*****************************************************************************/	400	/*****************************************************************************/
705		401
706	static void	402	static void
707	grp_try_feed (eio_req *grp)	403	grp_try_feed (eio_req *grp)
…		…
774	}	470	}
775		471
776	void	472	void
777	eio_grp_cancel (eio_req *grp)	473	eio_grp_cancel (eio_req *grp)
778	{	474	{
779	for (grp = grp->grp_first; grp; grp = grp->grp_next)
780	eio_cancel (grp);	475	etp_grp_cancel (grp);
781	}	476	}
782		477
783	void	478	void
784	eio_cancel (eio_req *req)	479	eio_cancel (eio_req *req)
785	{	480	{
…		…
857	return etp_poll ();	552	return etp_poll ();
858	}	553	}
859		554
860	/*****************************************************************************/	555	/*****************************************************************************/
861	/* work around various missing functions */	556	/* work around various missing functions */
862
863	#if !HAVE_PREADWRITE
864	# undef pread
865	# undef pwrite
866	# define pread eio__pread
867	# define pwrite eio__pwrite
868
869	static eio_ssize_t
870	eio__pread (int fd, void *buf, size_t count, off_t offset)
871	{
872	eio_ssize_t res;
873	off_t ooffset;
874
875	X_LOCK (preadwritelock);
876	ooffset = lseek (fd, 0, SEEK_CUR);
877	lseek (fd, offset, SEEK_SET);
878	res = read (fd, buf, count);
879	lseek (fd, ooffset, SEEK_SET);
880	X_UNLOCK (preadwritelock);
881
882	return res;
883	}
884
885	static eio_ssize_t
886	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
887	{
888	eio_ssize_t res;
889	off_t ooffset;
890
891	X_LOCK (preadwritelock);
892	ooffset = lseek (fd, 0, SEEK_CUR);
893	lseek (fd, offset, SEEK_SET);
894	res = write (fd, buf, count);
895	lseek (fd, ooffset, SEEK_SET);
896	X_UNLOCK (preadwritelock);
897
898	return res;
899	}
900	#endif
901		557
902	#ifndef HAVE_UTIMES	558	#ifndef HAVE_UTIMES
903		559
904	# undef utimes	560	# undef utimes
905	# define utimes(path,times) eio__utimes (path, times)	561	# define utimes(path,times) eio__utimes (path, times)
…		…
938		594
939	#if !HAVE_FDATASYNC	595	#if !HAVE_FDATASYNC
940	# undef fdatasync	596	# undef fdatasync
941	# define fdatasync(fd) fsync (fd)	597	# define fdatasync(fd) fsync (fd)
942	#endif	598	#endif
		599
		600	static int
		601	eio__syncfs (int fd)
		602	{
		603	int res;
		604
		605	#if HAVE_SYS_SYNCFS
		606	res = (int)syscall (__NR_syncfs, (int)(fd));
		607	#else
		608	res = EIO_ENOSYS ();
		609	#endif
		610
		611	if (res < 0 && errno == ENOSYS && fd >= 0)
		612	sync ();
		613
		614	return res;
		615	}
943		616
944	/* sync_file_range always needs emulation */	617	/* sync_file_range always needs emulation */
945	static int	618	static int
946	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	619	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
947	{	620	{
…		…
970	}	643	}
971		644
972	static int	645	static int
973	eio__fallocate (int fd, int mode, off_t offset, size_t len)	646	eio__fallocate (int fd, int mode, off_t offset, size_t len)
974	{	647	{
975	#if HAVE_FALLOCATE	648	#if HAVE_LINUX_FALLOCATE
976	return fallocate (fd, mode, offset, len);	649	return fallocate (fd, mode, offset, len);
977	#else	650	#else
978	errno = ENOSYS;	651	return EIO_ENOSYS ();
979	return -1;
980	#endif	652	#endif
981	}	653	}
982		654
983	#if !HAVE_READAHEAD	655	#if !HAVE_READAHEAD
984	# undef readahead	656	# undef readahead
…		…
997	pread (fd, eio_buf, len, offset);	669	pread (fd, eio_buf, len, offset);
998	offset += len;	670	offset += len;
999	todo -= len;	671	todo -= len;
1000	}	672	}
1001		673
1002	errno = 0;	674	FUBd;
		675
		676	/* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
		677	/* but not for e.g. EIO or eof, so we also never fail */
1003	return count;	678	return 0;
1004	}	679	}
1005		680
1006	#endif	681	#endif
1007		682
1008	/* sendfile always needs emulation */	683	/* sendfile always needs emulation */
1009	static eio_ssize_t	684	static eio_ssize_t
1010	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	685	eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
1011	{	686	{
1012	eio_ssize_t written = 0;	687	eio_ssize_t written = 0;
1013	eio_ssize_t res;	688	eio_ssize_t res;
1014		689
1015	if (!count)	690	if (!count)
…		…
1043		718
1044	/* according to source inspection, this is correct, and useful behaviour */	719	/* according to source inspection, this is correct, and useful behaviour */
1045	if (sbytes)	720	if (sbytes)
1046	res = sbytes;	721	res = sbytes;
1047		722
1048	# elif defined (__APPLE__)	723	# elif defined __APPLE__
1049	off_t sbytes = count;	724	off_t sbytes = count;
1050	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	725	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1051		726
1052	/* according to the manpage, sbytes is always valid */	727	/* according to the manpage, sbytes is always valid */
1053	if (sbytes)	728	if (sbytes)
…		…
1080	HANDLE h = TO_SOCKET (ifd);	755	HANDLE h = TO_SOCKET (ifd);
1081	SetFilePointer (h, offset, 0, FILE_BEGIN);	756	SetFilePointer (h, offset, 0, FILE_BEGIN);
1082	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	757	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1083		758
1084	#else	759	#else
1085	res = -1;	760	res = EIO_ENOSYS ();
1086	errno = ENOSYS;
1087	#endif	761	#endif
1088		762
1089	/* we assume sendfile can copy at least 128mb in one go */	763	/* we assume sendfile can copy at least 128mb in one go */
1090	if (res <= 128 * 1024 * 1024)	764	if (res <= 128 * 1024 * 1024)
1091	{	765	{
…		…
1151		825
1152	offset += cnt;	826	offset += cnt;
1153	res += cnt;	827	res += cnt;
1154	count -= cnt;	828	count -= cnt;
1155	}	829	}
		830
		831	FUBd;
1156	}	832	}
1157		833
1158	return res;	834	return res;
1159	}	835	}
1160		836
…		…
1276		952
1277	/*****************************************************************************/	953	/*****************************************************************************/
1278	/* requests implemented outside eio_execute, because they are so large */	954	/* requests implemented outside eio_execute, because they are so large */
1279		955
1280	static void	956	static void
1281	eio__realpath (eio_req *req, etp_worker *self)	957	eio__lseek (eio_req *req)
1282	{	958	{
1283	char *rel = req->ptr1;	959	/* this usually gets optimised away completely, or your compiler sucks, */
		960	/* or the whence constants really are not 0, 1, 2 */
		961	int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
		962	: req->int2 == EIO_SEEK_CUR ? SEEK_CUR
		963	: req->int2 == EIO_SEEK_END ? SEEK_END
		964	: req->int2;
		965
		966	req->offs = lseek (req->int1, req->offs, whence);
		967	req->result = req->offs == (off_t)-1 ? -1 : 0;
		968	}
		969
		970	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
		971	static int
		972	eio__realpath (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
		973	{
1284	char *res;	974	char *res;
		975	const char *rel = path;
1285	char *tmp1, *tmp2;	976	char *tmp1, *tmp2;
1286	#if SYMLOOP_MAX > 32	977	#if SYMLOOP_MAX > 32
1287	int symlinks = SYMLOOP_MAX;	978	int symlinks = SYMLOOP_MAX;
1288	#else	979	#else
1289	int symlinks = 32;	980	int symlinks = 32;
1290	#endif	981	#endif
1291		982
1292	req->result = -1;
1293
1294	errno = EINVAL;	983	errno = EINVAL;
1295	if (!rel)	984	if (!rel)
1296	return;	985	return -1;
1297		986
1298	errno = ENOENT;	987	errno = ENOENT;
1299	if (!*rel)	988	if (!*rel)
1300	return;	989	return -1;
1301		990
1302	if (!req->ptr2)	991	res = tmpbuf_get (tmpbuf, PATH_MAX * 3);
1303	{	992	#ifdef _WIN32
1304	X_LOCK (wrklock);	993	if (_access (rel, 4) != 0)
1305	req->flags |= EIO_FLAG_PTR2_FREE;
1306	X_UNLOCK (wrklock);
1307	req->ptr2 = malloc (PATH_MAX * 3);
1308
1309	errno = ENOMEM;
1310	if (!req->ptr2)
1311	return;	994	return -1;
1312	}
1313		995
1314	res = req->ptr2;	996	symlinks = GetFullPathName (rel, PATH_MAX * 3, res, 0);
		997
		998	errno = ENAMETOOLONG;
		999	if (symlinks >= PATH_MAX * 3)
		1000	return -1;
		1001
		1002	errno = EIO;
		1003	if (symlinks <= 0)
		1004	return -1;
		1005
		1006	return symlinks;
		1007
		1008	#else
1315	tmp1 = res + PATH_MAX;	1009	tmp1 = res + PATH_MAX;
1316	tmp2 = tmp1 + PATH_MAX;	1010	tmp2 = tmp1 + PATH_MAX;
1317		1011
1318	#if 0 /* disabled, the musl way to do things is just too racy */	1012	#if 0 /* disabled, the musl way to do things is just too racy */
1319	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1013	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
…		…
1323		1017
1324	if (fd >= 0)	1018	if (fd >= 0)
1325	{	1019	{
1326	sprintf (tmp1, "/proc/self/fd/%d", fd);	1020	sprintf (tmp1, "/proc/self/fd/%d", fd);
1327	req->result = readlink (tmp1, res, PATH_MAX);	1021	req->result = readlink (tmp1, res, PATH_MAX);
		1022	/* here we should probably stat the open file and the disk file, to make sure they still match */
1328	close (fd);	1023	close (fd);
1329
1330	/* here we should probably stat the open file and the disk file, to make sure they still match */
1331		1024
1332	if (req->result > 0)	1025	if (req->result > 0)
1333	goto done;	1026	goto done;
1334	}	1027	}
1335	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)	1028	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1336	return;	1029	return -1;
1337	}	1030	}
1338	#endif	1031	#endif
1339	#endif	1032	#endif
1340		1033
1341	if (*rel != '/')	1034	if (*rel != '/')
1342	{	1035	{
		1036	int len;
		1037
		1038	errno = ENOENT;
		1039	if (wd == EIO_INVALID_WD)
		1040	return -1;
		1041
		1042	if (wd == EIO_CWD)
		1043	{
1343	if (!getcwd (res, PATH_MAX))	1044	if (!getcwd (res, PATH_MAX))
1344	return;	1045	return -1;
		1046
		1047	len = strlen (res);
		1048	}
		1049	else
		1050	memcpy (res, wd->str, len = wd->len);
1345		1051
1346	if (res [1]) /* only use if not / */	1052	if (res [1]) /* only use if not / */
1347	res += strlen (res);	1053	res += len;
1348	}	1054	}
1349		1055
1350	while (*rel)	1056	while (*rel)
1351	{	1057	{
1352	eio_ssize_t len, linklen;	1058	eio_ssize_t len, linklen;
1353	char *beg = rel;	1059	const char *beg = rel;
1354		1060
1355	while (*rel && *rel != '/')	1061	while (*rel && *rel != '/')
1356	++rel;	1062	++rel;
1357		1063
1358	len = rel - beg;	1064	len = rel - beg;
…		…
1370		1076
1371	if (beg [1] == '.' && len == 2)	1077	if (beg [1] == '.' && len == 2)
1372	{	1078	{
1373	/* .. - back up one component, if possible */	1079	/* .. - back up one component, if possible */
1374		1080
1375	while (res != req->ptr2)	1081	while (res != tmpbuf->ptr)
1376	if (*--res == '/')	1082	if (*--res == '/')
1377	break;	1083	break;
1378		1084
1379	continue;	1085	continue;
1380	}	1086	}
1381	}	1087	}
1382		1088
1383	errno = ENAMETOOLONG;	1089	errno = ENAMETOOLONG;
1384	if (res + 1 + len + 1 >= tmp1)	1090	if (res + 1 + len + 1 >= tmp1)
1385	return;	1091	return -1;
1386		1092
1387	/* copy one component */	1093	/* copy one component */
1388	*res = '/';	1094	*res = '/';
1389	memcpy (res + 1, beg, len);	1095	memcpy (res + 1, beg, len);
1390		1096
1391	/* zero-terminate, for readlink */	1097	/* zero-terminate, for readlink */
1392	res [len + 1] = 0;	1098	res [len + 1] = 0;
1393		1099
1394	/* now check if it's a symlink */	1100	/* now check if it's a symlink */
1395	linklen = readlink (req->ptr2, tmp1, PATH_MAX);	1101	linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
1396		1102
1397	if (linklen < 0)	1103	if (linklen < 0)
1398	{	1104	{
1399	if (errno != EINVAL)	1105	if (errno != EINVAL)
1400	return;	1106	return -1;
1401		1107
1402	/* it's a normal directory. hopefully */	1108	/* it's a normal directory. hopefully */
1403	res += len + 1;	1109	res += len + 1;
1404	}	1110	}
1405	else	1111	else
…		…
1407	/* yay, it was a symlink - build new path in tmp2 */	1113	/* yay, it was a symlink - build new path in tmp2 */
1408	int rellen = strlen (rel);	1114	int rellen = strlen (rel);
1409		1115
1410	errno = ENAMETOOLONG;	1116	errno = ENAMETOOLONG;
1411	if (linklen + 1 + rellen >= PATH_MAX)	1117	if (linklen + 1 + rellen >= PATH_MAX)
1412	return;	1118	return -1;
1413		1119
1414	errno = ELOOP;	1120	errno = ELOOP;
1415	if (!--symlinks)	1121	if (!--symlinks)
1416	return;	1122	return -1;
1417		1123
1418	if (*tmp1 == '/')	1124	if (*tmp1 == '/')
1419	res = req->ptr2; /* symlink resolves to an absolute path */	1125	res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1420		1126
1421	/* we need to be careful, as rel might point into tmp2 already */	1127	/* we need to be careful, as rel might point into tmp2 already */
1422	memmove (tmp2 + linklen + 1, rel, rellen + 1);	1128	memmove (tmp2 + linklen + 1, rel, rellen + 1);
1423	tmp2 [linklen] = '/';	1129	tmp2 [linklen] = '/';
1424	memcpy (tmp2, tmp1, linklen);	1130	memcpy (tmp2, tmp1, linklen);
…		…
1426	rel = tmp2;	1132	rel = tmp2;
1427	}	1133	}
1428	}	1134	}
1429		1135
1430	/* special case for the lone root path */	1136	/* special case for the lone root path */
1431	if (res == req->ptr2)	1137	if (res == tmpbuf->ptr)
1432	*res++ = '/';	1138	*res++ = '/';
1433		1139
1434	req->result = res - (char *)req->ptr2;	1140	return res - (char *)tmpbuf->ptr;
1435		1141	#endif
1436	done:
1437	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
1438	}	1142	}
1439		1143
1440	static signed char	1144	static signed char
1441	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1145	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1442	{	1146	{
…		…
1630	#ifdef _WIN32	1334	#ifdef _WIN32
1631	{	1335	{
1632	int len = strlen ((const char *)req->ptr1);	1336	int len = strlen ((const char *)req->ptr1);
1633	char *path = malloc (MAX_PATH);	1337	char *path = malloc (MAX_PATH);
1634	const char *fmt;	1338	const char *fmt;
		1339	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1635		1340
1636	if (!len)	1341	if (!len)
1637	fmt = "./*";	1342	fmt = "./*";
1638	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')	1343	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1639	fmt = "%s*";	1344	fmt = "%s*";
1640	else	1345	else
1641	fmt = "%s/*";	1346	fmt = "%s/*";
1642		1347
1643	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);	1348	_snprintf (path, MAX_PATH, fmt, reqpath);
1644	dirp = FindFirstFile (path, &entp);	1349	dirp = FindFirstFile (path, &entp);
1645	free (path);	1350	free (path);
1646		1351
1647	if (dirp == INVALID_HANDLE_VALUE)	1352	if (dirp == INVALID_HANDLE_VALUE)
1648	{	1353	{
1649	dirp = 0;	1354	/* should steal _dosmaperr */
1650
1651	switch (GetLastError ())	1355	switch (GetLastError ())
1652	{	1356	{
1653	case ERROR_FILE_NOT_FOUND:	1357	case ERROR_FILE_NOT_FOUND:
1654	req->result = 0;	1358	req->result = 0;
1655	break;	1359	break;
1656		1360
1657	case ERROR_INVALID_NAME:	1361	case ERROR_INVALID_NAME:
1658	case ERROR_PATH_NOT_FOUND:	1362	case ERROR_PATH_NOT_FOUND:
1659	case ERROR_NO_MORE_FILES:	1363	case ERROR_NO_MORE_FILES:
1660	errno = ENOENT;	1364	errno = ENOENT;
1661	break;	1365	break;
1662		1366
1663	case ERROR_NOT_ENOUGH_MEMORY:	1367	case ERROR_NOT_ENOUGH_MEMORY:
1664	errno = ENOMEM;	1368	errno = ENOMEM;
1665	break;	1369	break;
1666		1370
1667	default:	1371	default:
1668	errno = EINVAL;	1372	errno = EINVAL;
1669	break;	1373	break;
1670	}	1374	}
		1375
		1376	return;
1671	}	1377	}
1672	}	1378	}
1673	#else	1379	#else
		1380	#if HAVE_AT
		1381	if (req->wd)
		1382	{
		1383	int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1384
		1385	if (fd < 0)
		1386	return;
		1387
		1388	dirp = fdopendir (fd);
		1389
		1390	if (!dirp)
		1391	close (fd);
		1392	}
		1393	else
1674	dirp = opendir (req->ptr1);	1394	dirp = opendir (req->ptr1);
		1395	#else
		1396	dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
		1397	#endif
		1398
		1399	if (!dirp)
		1400	return;
1675	#endif	1401	#endif
1676		1402
1677	if (req->flags & EIO_FLAG_PTR1_FREE)	1403	if (req->flags & EIO_FLAG_PTR1_FREE)
1678	free (req->ptr1);	1404	free (req->ptr1);
1679		1405
1680	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1406	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1681	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1407	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1682	req->ptr2 = names = malloc (namesalloc);	1408	req->ptr2 = names = malloc (namesalloc);
1683		1409
1684	if (dirp && names && (!flags || dents))	1410	if (!names || (flags && !dents))
		1411	return;
		1412
1685	for (;;)	1413	for (;;)
1686	{	1414	{
1687	int done;	1415	int done;
1688		1416
1689	#ifdef _WIN32	1417	#ifdef _WIN32
1690	done = !dirp;	1418	done = !dirp;
1691	#else	1419	#else
1692	errno = 0;	1420	errno = 0;
1693	entp = readdir (dirp);	1421	entp = readdir (dirp);
1694	done = !entp;	1422	done = !entp;
1695	#endif	1423	#endif
1696		1424
1697	if (done)	1425	if (done)
1698	{	1426	{
1699	#ifndef _WIN32	1427	#ifndef _WIN32
1700	int old_errno = errno;	1428	int old_errno = errno;
1701	closedir (dirp);	1429	closedir (dirp);
1702	errno = old_errno;	1430	errno = old_errno;
1703		1431
1704	if (errno)	1432	if (errno)
1705	break;	1433	break;
1706	#endif	1434	#endif
1707		1435
1708	/* sort etc. */	1436	/* sort etc. */
1709	req->int1 = flags;	1437	req->int1 = flags;
1710	req->result = dentoffs;	1438	req->result = dentoffs;
1711		1439
1712	if (flags & EIO_READDIR_STAT_ORDER)	1440	if (flags & EIO_READDIR_STAT_ORDER)
1713	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);	1441	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1714	else if (flags & EIO_READDIR_DIRS_FIRST)	1442	else if (flags & EIO_READDIR_DIRS_FIRST)
1715	if (flags & EIO_READDIR_FOUND_UNKNOWN)	1443	if (flags & EIO_READDIR_FOUND_UNKNOWN)
1716	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */	1444	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1717	else	1445	else
		1446	{
		1447	/* in this case, all is known, and we just put dirs first and sort them */
		1448	eio_dirent *oth = dents + dentoffs;
		1449	eio_dirent *dir = dents;
		1450
		1451	/* now partition dirs to the front, and non-dirs to the back */
		1452	/* by walking from both sides and swapping if necessary */
		1453	while (oth > dir)
		1454	{
		1455	if (dir->type == EIO_DT_DIR)
		1456	++dir;
		1457	else if ((--oth)->type == EIO_DT_DIR)
		1458	{
		1459	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1460
		1461	++dir;
		1462	}
		1463	}
		1464
		1465	/* now sort the dirs only (dirs all have the same score) */
		1466	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1467	}
		1468
		1469	break;
		1470	}
		1471
		1472	/* now add the entry to our list(s) */
		1473	name = D_NAME (entp);
		1474
		1475	/* skip . and .. entries */
		1476	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1477	{
		1478	int len = D_NAMLEN (entp) + 1;
		1479
		1480	while (ecb_expect_false (namesoffs + len > namesalloc))
		1481	{
		1482	namesalloc *= 2;
		1483	req->ptr2 = names = realloc (names, namesalloc);
		1484
		1485	if (!names)
		1486	break;
		1487	}
		1488
		1489	memcpy (names + namesoffs, name, len);
		1490
		1491	if (dents)
		1492	{
		1493	struct eio_dirent *ent;
		1494
		1495	if (ecb_expect_false (dentoffs == dentalloc))
1718	{	1496	{
1719	/* in this case, all is known, and we just put dirs first and sort them */	1497	dentalloc *= 2;
		1498	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1499
		1500	if (!dents)
		1501	break;
		1502	}
		1503
1720	eio_dirent *oth = dents + dentoffs;	1504	ent = dents + dentoffs;
1721	eio_dirent *dir = dents;
1722		1505
1723	/* now partition dirs to the front, and non-dirs to the back */	1506	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1724	/* by walking from both sides and swapping if necessary */	1507	ent->namelen = len - 1;
1725	while (oth > dir)	1508	ent->inode = D_INO (entp);
		1509
		1510	inode_bits |= ent->inode;
		1511
		1512	switch (D_TYPE (entp))
		1513	{
		1514	default:
		1515	ent->type = EIO_DT_UNKNOWN;
		1516	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1517	break;
		1518
		1519	#ifdef DT_FIFO
		1520	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1521	#endif
		1522	#ifdef DT_CHR
		1523	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1524	#endif
		1525	#ifdef DT_MPC
		1526	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1527	#endif
		1528	#ifdef DT_DIR
		1529	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1530	#endif
		1531	#ifdef DT_NAM
		1532	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1533	#endif
		1534	#ifdef DT_BLK
		1535	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1536	#endif
		1537	#ifdef DT_MPB
		1538	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1539	#endif
		1540	#ifdef DT_REG
		1541	case DT_REG: ent->type = EIO_DT_REG; break;
		1542	#endif
		1543	#ifdef DT_NWK
		1544	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1545	#endif
		1546	#ifdef DT_CMP
		1547	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1548	#endif
		1549	#ifdef DT_LNK
		1550	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1551	#endif
		1552	#ifdef DT_SOCK
		1553	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1554	#endif
		1555	#ifdef DT_DOOR
		1556	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1557	#endif
		1558	#ifdef DT_WHT
		1559	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1560	#endif
		1561	}
		1562
		1563	ent->score = 7;
		1564
		1565	if (flags & EIO_READDIR_DIRS_FIRST)
		1566	{
		1567	if (ent->type == EIO_DT_UNKNOWN)
1726	{	1568	{
1727	if (dir->type == EIO_DT_DIR)	1569	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1728	++dir;	1570	ent->score = 1;
1729	else if ((--oth)->type == EIO_DT_DIR)	1571	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1730	{	1572	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1731	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1732
1733	++dir;
1734	}
1735	}	1573	}
1736		1574	else if (ent->type == EIO_DT_DIR)
1737	/* now sort the dirs only (dirs all have the same score) */	1575	ent->score = 0;
1738	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1739	}	1576	}
1740
1741	break;
1742	}
1743
1744	/* now add the entry to our list(s) */
1745	name = D_NAME (entp);
1746
1747	/* skip . and .. entries */
1748	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1749	{
1750	int len = D_NAMLEN (entp) + 1;
1751
1752	while (ecb_expect_false (namesoffs + len > namesalloc))
1753	{
1754	namesalloc *= 2;
1755	req->ptr2 = names = realloc (names, namesalloc);
1756
1757	if (!names)
1758	break;
1759	}	1577	}
1760		1578
1761	memcpy (names + namesoffs, name, len);
1762
1763	if (dents)
1764	{
1765	struct eio_dirent *ent;
1766
1767	if (ecb_expect_false (dentoffs == dentalloc))
1768	{
1769	dentalloc *= 2;
1770	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1771
1772	if (!dents)
1773	break;
1774	}
1775
1776	ent = dents + dentoffs;
1777
1778	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1779	ent->namelen = len - 1;
1780	ent->inode = D_INO (entp);
1781
1782	inode_bits |= ent->inode;
1783
1784	switch (D_TYPE (entp))
1785	{
1786	default:
1787	ent->type = EIO_DT_UNKNOWN;
1788	flags |= EIO_READDIR_FOUND_UNKNOWN;
1789	break;
1790
1791	#ifdef DT_FIFO
1792	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1793	#endif
1794	#ifdef DT_CHR
1795	case DT_CHR: ent->type = EIO_DT_CHR; break;
1796	#endif
1797	#ifdef DT_MPC
1798	case DT_MPC: ent->type = EIO_DT_MPC; break;
1799	#endif
1800	#ifdef DT_DIR
1801	case DT_DIR: ent->type = EIO_DT_DIR; break;
1802	#endif
1803	#ifdef DT_NAM
1804	case DT_NAM: ent->type = EIO_DT_NAM; break;
1805	#endif
1806	#ifdef DT_BLK
1807	case DT_BLK: ent->type = EIO_DT_BLK; break;
1808	#endif
1809	#ifdef DT_MPB
1810	case DT_MPB: ent->type = EIO_DT_MPB; break;
1811	#endif
1812	#ifdef DT_REG
1813	case DT_REG: ent->type = EIO_DT_REG; break;
1814	#endif
1815	#ifdef DT_NWK
1816	case DT_NWK: ent->type = EIO_DT_NWK; break;
1817	#endif
1818	#ifdef DT_CMP
1819	case DT_CMP: ent->type = EIO_DT_CMP; break;
1820	#endif
1821	#ifdef DT_LNK
1822	case DT_LNK: ent->type = EIO_DT_LNK; break;
1823	#endif
1824	#ifdef DT_SOCK
1825	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1826	#endif
1827	#ifdef DT_DOOR
1828	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1829	#endif
1830	#ifdef DT_WHT
1831	case DT_WHT: ent->type = EIO_DT_WHT; break;
1832	#endif
1833	}
1834
1835	ent->score = 7;
1836
1837	if (flags & EIO_READDIR_DIRS_FIRST)
1838	{
1839	if (ent->type == EIO_DT_UNKNOWN)
1840	{
1841	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1842	ent->score = 1;
1843	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1844	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1845	}
1846	else if (ent->type == EIO_DT_DIR)
1847	ent->score = 0;
1848	}
1849	}
1850
1851	namesoffs += len;	1579	namesoffs += len;
1852	++dentoffs;	1580	++dentoffs;
1853	}	1581	}
1854		1582
1855	if (EIO_CANCELLED (req))	1583	if (EIO_CANCELLED (req))
1856	{	1584	{
1857	errno = ECANCELED;	1585	errno = ECANCELED;
1858	break;	1586	break;
1859	}	1587	}
1860		1588
1861	#ifdef _WIN32	1589	#ifdef _WIN32
1862	if (!FindNextFile (dirp, &entp))	1590	if (!FindNextFile (dirp, &entp))
1863	{	1591	{
1864	FindClose (dirp);	1592	FindClose (dirp);
1865	dirp = 0;	1593	dirp = 0;
1866	}	1594	}
1867	#endif	1595	#endif
1868	}	1596	}
1869	}	1597	}
		1598
		1599	/*****************************************************************************/
		1600	/* working directory stuff */
		1601	/* various deficiencies in the posix 2008 api force us to */
		1602	/* keep the absolute path in string form at all times */
		1603	/* fuck yeah. */
		1604
		1605	#if !HAVE_AT
		1606
		1607	/* a bit like realpath, but usually faster because it doesn'T have to return */
		1608	/* an absolute or canonical path */
		1609	static const char *
		1610	wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1611	{
		1612	if (!wd || *path == '/')
		1613	return path;
		1614
		1615	if (path [0] == '.' && !path [1])
		1616	return wd->str;
		1617
		1618	{
		1619	int l1 = wd->len;
		1620	int l2 = strlen (path);
		1621
		1622	char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2);
		1623
		1624	memcpy (res, wd->str, l1);
		1625	res [l1] = '/';
		1626	memcpy (res + l1 + 1, path, l2 + 1);
		1627
		1628	return res;
		1629	}
		1630	}
		1631
		1632	#endif
		1633
		1634	static eio_wd
		1635	eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1636	{
		1637	int fd;
		1638	eio_wd res;
		1639	int len = eio__realpath (tmpbuf, wd, path);
		1640
		1641	if (len < 0)
		1642	return EIO_INVALID_WD;
		1643
		1644	#if HAVE_AT
		1645	fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1646
		1647	if (fd < 0)
		1648	return EIO_INVALID_WD;
		1649	#endif
		1650
		1651	res = malloc (sizeof (*res) + len); /* one extra 0-byte */
		1652
		1653	#if HAVE_AT
		1654	res->fd = fd;
		1655	#endif
		1656
		1657	res->len = len;
		1658	memcpy (res->str, tmpbuf->ptr, len);
		1659	res->str [len] = 0;
		1660
		1661	return res;
		1662	}
		1663
		1664	eio_wd
		1665	eio_wd_open_sync (eio_wd wd, const char *path)
		1666	{
		1667	struct tmpbuf tmpbuf = { 0 };
		1668	wd = eio__wd_open_sync (&tmpbuf, wd, path);
		1669	free (tmpbuf.ptr);
		1670
		1671	return wd;
		1672	}
		1673
		1674	void
		1675	eio_wd_close_sync (eio_wd wd)
		1676	{
		1677	if (wd != EIO_INVALID_WD && wd != EIO_CWD)
		1678	{
		1679	#if HAVE_AT
		1680	close (wd->fd);
		1681	#endif
		1682	free (wd);
		1683	}
		1684	}
		1685
		1686	#if HAVE_AT
		1687
		1688	/* they forgot these */
		1689
		1690	static int
		1691	eio__truncateat (int dirfd, const char *path, off_t length)
		1692	{
		1693	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
		1694	int res;
		1695
		1696	if (fd < 0)
		1697	return fd;
		1698
		1699	res = ftruncate (fd, length);
		1700	close (fd);
		1701	return res;
		1702	}
		1703
		1704	static int
		1705	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
		1706	{
		1707	int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
		1708	int res;
		1709
		1710	if (fd < 0)
		1711	return fd;
		1712
		1713	res = fstatvfs (fd, buf);
		1714	close (fd);
		1715	return res;
		1716
		1717	}
		1718
		1719	#endif
1870		1720
1871	/*****************************************************************************/	1721	/*****************************************************************************/
1872		1722
1873	#define ALLOC(len) \	1723	#define ALLOC(len) \
1874	if (!req->ptr2) \	1724	if (!req->ptr2) \
…		…
1883	req->result = -1; \	1733	req->result = -1; \
1884	break; \	1734	break; \
1885	} \	1735	} \
1886	}	1736	}
1887		1737
		1738	static void ecb_noinline ecb_cold
		1739	etp_proc_init (void)
		1740	{
		1741	#if HAVE_PRCTL_SET_NAME
		1742	/* provide a more sensible "thread name" */
		1743	char name[16 + 1];
		1744	const int namelen = sizeof (name) - 1;
		1745	int len;
		1746
		1747	prctl (PR_GET_NAME, (unsigned long)name, 0, 0, 0);
		1748	name [namelen] = 0;
		1749	len = strlen (name);
		1750	strcpy (name + (len <= namelen - 4 ? len : namelen - 4), "/eio");
		1751	prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0);
		1752	#endif
		1753	}
		1754
		1755	/* TODO: move somehow to etp.c */
1888	X_THREAD_PROC (etp_proc)	1756	X_THREAD_PROC (etp_proc)
1889	{	1757	{
1890	ETP_REQ *req;	1758	ETP_REQ *req;
1891	struct timespec ts;	1759	struct timespec ts;
1892	etp_worker *self = (etp_worker *)thr_arg;	1760	etp_worker *self = (etp_worker *)thr_arg;
1893		1761
		1762	etp_proc_init ();
		1763
1894	/* try to distribute timeouts somewhat evenly */	1764	/* try to distribute timeouts somewhat evenly */
1895	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1765	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1896		1766
1897	for (;;)	1767	for (;;)
1898	{	1768	{
…		…
1900		1770
1901	X_LOCK (reqlock);	1771	X_LOCK (reqlock);
1902		1772
1903	for (;;)	1773	for (;;)
1904	{	1774	{
1905	self->req = req = reqq_shift (&req_queue);	1775	req = reqq_shift (&req_queue);
1906		1776
1907	if (req)	1777	if (req)
1908	break;	1778	break;
1909		1779
1910	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */	1780	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
…		…
1936		1806
1937	--nready;	1807	--nready;
1938		1808
1939	X_UNLOCK (reqlock);	1809	X_UNLOCK (reqlock);
1940		1810
1941	if (req->type < 0)	1811	if (req->type == ETP_TYPE_QUIT)
1942	goto quit;	1812	goto quit;
1943		1813
1944	ETP_EXECUTE (self, req);	1814	ETP_EXECUTE (self, req);
1945		1815
1946	X_LOCK (reslock);	1816	X_LOCK (reslock);
…		…
1948	++npending;	1818	++npending;
1949		1819
1950	if (!reqq_push (&res_queue, req) && want_poll_cb)	1820	if (!reqq_push (&res_queue, req) && want_poll_cb)
1951	want_poll_cb ();	1821	want_poll_cb ();
1952		1822
1953	self->req = 0;
1954	etp_worker_clear (self);	1823	etp_worker_clear (self);
1955		1824
1956	X_UNLOCK (reslock);	1825	X_UNLOCK (reslock);
1957	}	1826	}
1958		1827
1959	quit:	1828	quit:
		1829	free (req);
		1830
1960	X_LOCK (wrklock);	1831	X_LOCK (wrklock);
1961	etp_worker_free (self);	1832	etp_worker_free (self);
1962	X_UNLOCK (wrklock);	1833	X_UNLOCK (wrklock);
1963		1834
1964	return 0;	1835	return 0;
…		…
1967	/*****************************************************************************/	1838	/*****************************************************************************/
1968		1839
1969	int ecb_cold	1840	int ecb_cold
1970	eio_init (void (*want_poll)(void), void (*done_poll)(void))	1841	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1971	{	1842	{
1972	#if !HAVE_PREADWRITE
1973	X_MUTEX_CREATE (preadwritelock);
1974	#endif
1975
1976	return etp_init (want_poll, done_poll);	1843	return etp_init (want_poll, done_poll);
1977	}	1844	}
1978		1845
1979	ecb_inline void	1846	ecb_inline void
1980	eio_api_destroy (eio_req *req)	1847	eio_api_destroy (eio_req *req)
1981	{	1848	{
1982	free (req);	1849	free (req);
1983	}	1850	}
1984		1851
1985	#define REQ(rtype) \	1852	#define REQ(rtype) \
1986	eio_req *req; \	1853	eio_req *req; \
1987	\	1854	\
1988	req = (eio_req *)calloc (1, sizeof *req); \	1855	req = (eio_req *)calloc (1, sizeof *req); \
1989	if (!req) \	1856	if (!req) \
1990	return 0; \	1857	return 0; \
…		…
2004	{ \	1871	{ \
2005	eio_api_destroy (req); \	1872	eio_api_destroy (req); \
2006	return 0; \	1873	return 0; \
2007	}	1874	}
2008		1875
		1876	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1877
2009	static void	1878	static void
2010	eio_execute (etp_worker *self, eio_req *req)	1879	eio_execute (etp_worker *self, eio_req *req)
2011	{	1880	{
		1881	#if HAVE_AT
		1882	int dirfd;
		1883	#else
		1884	const char *path;
		1885	#endif
		1886
2012	if (ecb_expect_false (EIO_CANCELLED (req)))	1887	if (ecb_expect_false (EIO_CANCELLED (req)))
2013	{	1888	{
2014	req->result = -1;	1889	req->result = -1;
2015	req->errorno = ECANCELED;	1890	req->errorno = ECANCELED;
2016	return;	1891	return;
2017	}	1892	}
2018		1893
		1894	if (ecb_expect_false (req->wd == EIO_INVALID_WD))
		1895	{
		1896	req->result = -1;
		1897	req->errorno = ENOENT;
		1898	return;
		1899	}
		1900
		1901	if (req->type >= EIO_OPEN)
		1902	{
		1903	#if HAVE_AT
		1904	dirfd = WD2FD (req->wd);
		1905	#else
		1906	path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
		1907	#endif
		1908	}
		1909
2019	switch (req->type)	1910	switch (req->type)
2020	{	1911	{
		1912	case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
		1913	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
		1914	break;
		1915	case EIO_WD_CLOSE: req->result = 0;
		1916	eio_wd_close_sync (req->wd); break;
		1917
		1918	case EIO_SEEK: eio__lseek (req); break;
2021	case EIO_READ: ALLOC (req->size);	1919	case EIO_READ: ALLOC (req->size);
2022	req->result = req->offs >= 0	1920	req->result = req->offs >= 0
2023	? pread (req->int1, req->ptr2, req->size, req->offs)	1921	? pread (req->int1, req->ptr2, req->size, req->offs)
2024	: read (req->int1, req->ptr2, req->size); break;	1922	: read (req->int1, req->ptr2, req->size); break;
2025	case EIO_WRITE: req->result = req->offs >= 0	1923	case EIO_WRITE: req->result = req->offs >= 0
2026	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1924	? pwrite (req->int1, req->ptr2, req->size, req->offs)
2027	: write (req->int1, req->ptr2, req->size); break;	1925	: write (req->int1, req->ptr2, req->size); break;
2028		1926
2029	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	1927	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
2030	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;	1928	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
		1929
		1930	#if HAVE_AT
2031		1931
2032	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1932	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2033	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1933	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
2034	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1934	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1935	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
		1936	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
		1937	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
		1938	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
		1939	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
		1940
		1941	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
		1942	case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
		1943	req->result = req->wd && SINGLEDOT (req->ptr1)
		1944	? rmdir (req->wd->str)
		1945	: unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
		1946	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
		1947	case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */
		1948	req->result = req->wd && SINGLEDOT (req->ptr1)
		1949	? rename (req->wd->str, req->ptr2)
		1950	: renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
		1951	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
		1952	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
		1953	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		1954	case EIO_READLINK: ALLOC (PATH_MAX);
		1955	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
		1956	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1957	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1958	case EIO_UTIME:
		1959	case EIO_FUTIME:
		1960	{
		1961	struct timespec ts[2];
		1962	struct timespec *times;
		1963
		1964	if (req->nv1 != -1. || req->nv2 != -1.)
		1965	{
		1966	ts[0].tv_sec = req->nv1;
		1967	ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
		1968	ts[1].tv_sec = req->nv2;
		1969	ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
		1970
		1971	times = ts;
		1972	}
		1973	else
		1974	times = 0;
		1975
		1976	req->result = req->type == EIO_FUTIME
		1977	? futimens (req->int1, times)
		1978	: utimensat (dirfd, req->ptr1, times, 0);
		1979	}
		1980	break;
		1981
		1982	#else
		1983
		1984	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1985	req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1986	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2035	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1987	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1988	case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
		1989	case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
		1990	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
		1991	case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
		1992
		1993	case EIO_UNLINK: req->result = unlink (path ); break;
		1994	case EIO_RMDIR: req->result = rmdir (path ); break;
		1995	case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
		1996	case EIO_RENAME: req->result = rename (path , req->ptr2); break;
		1997	case EIO_LINK: req->result = link (path , req->ptr2); break;
		1998	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
		1999	case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
		2000	case EIO_READLINK: ALLOC (PATH_MAX);
		2001	req->result = readlink (path, req->ptr2, PATH_MAX); break;
		2002	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2003	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2004
		2005	case EIO_UTIME:
		2006	case EIO_FUTIME:
		2007	{
		2008	struct timeval tv[2];
		2009	struct timeval *times;
		2010
		2011	if (req->nv1 != -1. || req->nv2 != -1.)
		2012	{
		2013	tv[0].tv_sec = req->nv1;
		2014	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
		2015	tv[1].tv_sec = req->nv2;
		2016	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
		2017
		2018	times = tv;
		2019	}
		2020	else
		2021	times = 0;
		2022
		2023	req->result = req->type == EIO_FUTIME
		2024	? futimes (req->int1, times)
		2025	: utimes (req->ptr1, times);
		2026	}
		2027	break;
		2028
		2029	#endif
		2030
		2031	case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
		2032	{
		2033	ALLOC (req->result);
		2034	memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
		2035	}
		2036	break;
		2037
2036	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2038	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2037	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	2039	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2038		2040
2039	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2040	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2041	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	2041	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2042	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;	2042	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2043		2043
2044	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
2045	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	2044	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2046	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
2047	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	2045	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2048	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
2049	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;	2046	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2050		2047
2051	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
2052	case EIO_CLOSE: req->result = close (req->int1); break;	2048	case EIO_CLOSE: req->result = close (req->int1); break;
2053	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;	2049	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2054	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
2055	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
2056	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
2057	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
2058	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
2059	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
2060	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2061
2062	case EIO_REALPATH: eio__realpath (req, self); break;
2063
2064	case EIO_READLINK: ALLOC (PATH_MAX);
2065	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
2066
2067	case EIO_SYNC: req->result = 0; sync (); break;	2050	case EIO_SYNC: req->result = 0; sync (); break;
2068	case EIO_FSYNC: req->result = fsync (req->int1); break;	2051	case EIO_FSYNC: req->result = fsync (req->int1); break;
2069	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2052	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2053	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
		2054	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2070	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;	2055	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
2071	case EIO_MTOUCH: req->result = eio__mtouch (req); break;	2056	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2072	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	2057	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2073	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	2058	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2074	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2075	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;	2059	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2076		2060
2077	case EIO_READDIR: eio__scandir (req, self); break;	2061	case EIO_READDIR: eio__scandir (req, self); break;
2078		2062
2079	case EIO_BUSY:	2063	case EIO_BUSY:
…		…
2089	req->result = select (0, 0, 0, 0, &tv);	2073	req->result = select (0, 0, 0, 0, &tv);
2090	}	2074	}
2091	#endif	2075	#endif
2092	break;	2076	break;
2093		2077
2094	case EIO_UTIME:
2095	case EIO_FUTIME:
2096	{
2097	struct timeval tv[2];
2098	struct timeval *times;
2099
2100	if (req->nv1 != -1. || req->nv2 != -1.)
2101	{
2102	tv[0].tv_sec = req->nv1;
2103	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
2104	tv[1].tv_sec = req->nv2;
2105	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
2106
2107	times = tv;
2108	}
2109	else
2110	times = 0;
2111
2112	req->result = req->type == EIO_FUTIME
2113	? futimes (req->int1, times)
2114	: utimes (req->ptr1, times);
2115	}
2116	break;
2117
2118	case EIO_GROUP:	2078	case EIO_GROUP:
2119	abort (); /* handled in eio_request */	2079	abort (); /* handled in eio_request */
2120		2080
2121	case EIO_NOP:	2081	case EIO_NOP:
2122	req->result = 0;	2082	req->result = 0;
…		…
2125	case EIO_CUSTOM:	2085	case EIO_CUSTOM:
2126	req->feed (req);	2086	req->feed (req);
2127	break;	2087	break;
2128		2088
2129	default:	2089	default:
2130	errno = ENOSYS;
2131	req->result = -1;	2090	req->result = EIO_ENOSYS ();
2132	break;	2091	break;
2133	}	2092	}
2134		2093
2135	req->errorno = errno;	2094	req->errorno = errno;
2136	}	2095	}
2137		2096
2138	#ifndef EIO_NO_WRAPPERS	2097	#ifndef EIO_NO_WRAPPERS
2139		2098
		2099	eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
		2100	{
		2101	REQ (EIO_WD_OPEN); PATH; SEND;
		2102	}
		2103
		2104	eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
		2105	{
		2106	REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
		2107	}
		2108
2140	eio_req *eio_nop (int pri, eio_cb cb, void *data)	2109	eio_req *eio_nop (int pri, eio_cb cb, void *data)
2141	{	2110	{
2142	REQ (EIO_NOP); SEND;	2111	REQ (EIO_NOP); SEND;
2143	}	2112	}
2144		2113
…		…
2160	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2129	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2161	{	2130	{
2162	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2131	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2163	}	2132	}
2164		2133
		2134	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		2135	{
		2136	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2137	}
		2138
		2139	eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
		2140	{
		2141	REQ (EIO_SYNCFS); req->int1 = fd; SEND;
		2142	}
		2143
		2144	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2145	{
		2146	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2147	}
		2148
2165	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2149	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2166	{	2150	{
2167	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2151	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2168	}	2152	}
2169		2153
…		…
2175	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)	2159	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2176	{	2160	{
2177	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;	2161	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2178	}	2162	}
2179		2163
2180	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
2181	{
2182	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2183	}
2184
2185	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)	2164	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2186	{	2165	{
2187	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;	2166	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2188	}	2167	}
2189		2168
2190	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
2191	{
2192	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
2193	}
2194
2195	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)	2169	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2196	{	2170	{
2197	REQ (EIO_CLOSE); req->int1 = fd; SEND;	2171	REQ (EIO_CLOSE); req->int1 = fd; SEND;
2198	}	2172	}
2199		2173
2200	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)	2174	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2201	{	2175	{
2202	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2176	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		2177	}
		2178
		2179	eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
		2180	{
		2181	REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
2203	}	2182	}
2204		2183
2205	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)	2184	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2206	{	2185	{
2207	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;	2186	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
…		…
2425	/* misc garbage */	2404	/* misc garbage */
2426		2405
2427	eio_ssize_t	2406	eio_ssize_t
2428	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2407	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2429	{	2408	{
2430	etp_worker wrk;
2431	eio_ssize_t ret;
2432
2433	wrk.dbuf = 0;
2434
2435	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);	2409	return eio__sendfile (ofd, ifd, offset, count);
2436
2437	if (wrk.dbuf)
2438	free (wrk.dbuf);
2439
2440	return ret;
2441	}	2410	}
2442		2411

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