/* * libeio implementation * * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016,2017 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef _WIN32 # include "config.h" #endif #include "eio.h" #include "ecb.h" #include #include #include #include #include #include #include #include #include #include /* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */ /* intptr_t only comes from stdint.h, says idiot openbsd coder */ #if HAVE_STDINT_H # include #endif #ifndef ECANCELED # define ECANCELED EDOM #endif #ifndef ELOOP # define ELOOP EDOM #endif #if !defined(ENOTSOCK) && defined(WSAENOTSOCK) # define ENOTSOCK WSAENOTSOCK #endif static void eio_destroy (eio_req *req); #ifndef EIO_FINISH # define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 #endif #ifndef EIO_DESTROY # define EIO_DESTROY(req) do { if ((req)->destroy) (req)->destroy (req); } while (0) #endif #ifndef EIO_FEED # define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) #endif #ifndef EIO_FD_TO_WIN32_HANDLE # define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) #endif #ifndef EIO_WIN32_HANDLE_TO_FD # define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) #endif #define EIO_ERRNO(errval,retval) ((errno = errval), retval) #define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1) #ifdef _WIN32 #undef PAGESIZE #define PAGESIZE 4096 /* GetSystemInfo? */ /* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */ #ifdef EIO_STRUCT_STATI64 /* look at perl's non-sloppy stat */ #define stat(path,buf) _stati64 (path,buf) #define fstat(fd,buf) _fstati64 (fd,buf) #endif #define lstat(path,buf) stat (path,buf) #define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1)) #define mkdir(path,mode) _mkdir (path) #define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1)) #define chmod(path,mode) _chmod (path, mode) #define dup(fd) _dup (fd) #define dup2(fd1,fd2) _dup2 (fd1, fd2) #define pipe(fds) _pipe (fds, 4096, O_BINARY) #define fcntl(fd,cmd,arg) EIO_ENOSYS () #define ioctl(fd,cmd,arg) EIO_ENOSYS () #define fchmod(fd,mode) EIO_ENOSYS () #define chown(path,uid,gid) EIO_ENOSYS () #define fchown(fd,uid,gid) EIO_ENOSYS () #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */ #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */ #define mknod(path,mode,dev) EIO_ENOSYS () #define sync() EIO_ENOSYS () #define readlink(path,buf,s) EIO_ENOSYS () #define statvfs(path,buf) EIO_ENOSYS () #define fstatvfs(fd,buf) EIO_ENOSYS () #define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset) #define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset) #if __GNUC__ typedef long long eio_off_t; /* signed for compatibility to msvc */ #else typedef __int64 eio_off_t; /* unsigned not supported by msvc */ #endif static eio_ssize_t eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset) { OVERLAPPED o = { 0 }; DWORD got; o.Offset = offset; o.OffsetHigh = offset >> 32; return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o) ? got : -1; } static eio_ssize_t eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset) { OVERLAPPED o = { 0 }; DWORD got; o.Offset = offset; o.OffsetHigh = offset >> 32; return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o) ? got : -1; } /* rename() uses MoveFile, which fails to overwrite */ #define rename(old,neu) eio__rename (old, neu) static int eio__rename (const char *old, const char *neu) { if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING)) return 0; /* should steal _dosmaperr */ switch (GetLastError ()) { case ERROR_FILE_NOT_FOUND: case ERROR_PATH_NOT_FOUND: case ERROR_INVALID_DRIVE: case ERROR_NO_MORE_FILES: case ERROR_BAD_NETPATH: case ERROR_BAD_NET_NAME: case ERROR_BAD_PATHNAME: case ERROR_FILENAME_EXCED_RANGE: errno = ENOENT; break; default: errno = EACCES; break; } return -1; } /* we could even stat and see if it exists */ static int symlink (const char *old, const char *neu) { #if WINVER >= 0x0600 int flags; /* This tries out all combinations of SYMBOLIC_LINK_FLAG_DIRECTORY * and SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE, * with directory first. */ for (flags = 3; flags >= 0; --flags) if (CreateSymbolicLink (neu, old, flags)) return 0; #endif return EIO_ERRNO (ENOENT, -1); } /* POSIX API only, causing trouble for win32 apps */ #define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */ #define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */ struct statvfs { int dummy; }; #define DT_DIR EIO_DT_DIR #define DT_REG EIO_DT_REG #define D_NAME(entp) entp.cFileName #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) #else #include #include #include #include #include #include #ifdef ANDROID #include #define statvfs statfs #define fstatvfs fstatfs #include /* supposedly limits.h does #define PAGESIZE PAGESIZE */ #else #include #endif #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES #include #endif #define D_NAME(entp) entp->d_name /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ #if __FreeBSD__ || __NetBSD__ || __OpenBSD__ #define _DIRENT_HAVE_D_TYPE /* sigh */ #define D_INO(de) (de)->d_fileno #define D_NAMLEN(de) (de)->d_namlen #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 #define D_INO(de) (de)->d_ino #endif #ifdef _D_EXACT_NAMLEN #undef D_NAMLEN #define D_NAMLEN(de) _D_EXACT_NAMLEN (de) #endif #ifdef _DIRENT_HAVE_D_TYPE #define D_TYPE(de) (de)->d_type #endif #ifndef EIO_STRUCT_DIRENT #define EIO_STRUCT_DIRENT struct dirent #endif #endif #if HAVE_UTIMES # include #endif #if HAVE_SYS_SYSCALL_H # include #endif #if HAVE_SENDFILE # if __linux # include # elif __FreeBSD__ || defined __APPLE__ # include # include # elif __hpux # include # elif __solaris # include # else # error sendfile support requested but not available # endif #endif #if HAVE_RENAMEAT2 # include # include #endif #ifndef D_TYPE # define D_TYPE(de) 0 #endif #ifndef D_INO # define D_INO(de) 0 #endif #ifndef D_NAMLEN # define D_NAMLEN(entp) strlen (D_NAME (entp)) #endif /* used for struct dirent, AIX doesn't provide it */ #ifndef NAME_MAX # define NAME_MAX 4096 #endif /* used for readlink etc. */ #ifndef PATH_MAX # define PATH_MAX 0 #endif #ifndef O_CLOEXEC #define O_CLOEXEC 0 #endif #ifndef EIO_PATH_MIN # define EIO_PATH_MIN 8160 #endif #define EIO_PATH_MAX (PATH_MAX <= EIO_PATH_MIN ? EIO_PATH_MIN : PATH_MAX) /* buffer size for various temporary buffers */ #define EIO_BUFSIZE 65536 #define dBUF \ char *eio_buf = malloc (EIO_BUFSIZE); \ errno = ENOMEM; \ if (!eio_buf) \ return -1 #define FUBd \ free (eio_buf) /*****************************************************************************/ struct etp_tmpbuf; #if _POSIX_VERSION >= 200809L #define HAVE_AT 1 #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD) #ifndef O_SEARCH #define O_SEARCH O_RDONLY #endif #else #define HAVE_AT 0 static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path); #endif struct eio_pwd { #if HAVE_AT int fd; #endif int len; char str[1]; /* actually, a 0-terminated canonical path */ }; /*****************************************************************************/ #define ETP_PRI_MIN EIO_PRI_MIN #define ETP_PRI_MAX EIO_PRI_MAX #define ETP_TYPE_QUIT -1 #define ETP_TYPE_GROUP EIO_GROUP static void eio_nop_callback (void) { } static void (*eio_want_poll_cb)(void) = eio_nop_callback; static void (*eio_done_poll_cb)(void) = eio_nop_callback; #define ETP_WANT_POLL(pool) eio_want_poll_cb () #define ETP_DONE_POLL(pool) eio_done_poll_cb () struct etp_worker; #define ETP_REQ eio_req #define ETP_DESTROY(req) eio_destroy (req) static int eio_finish (eio_req *req); #define ETP_FINISH(req) eio_finish (req) static void eio_execute (struct etp_worker *self, eio_req *req); #define ETP_EXECUTE(wrk,req) eio_execute (wrk, req) #include "etp.c" static struct etp_pool eio_pool; #define EIO_POOL (&eio_pool) /*****************************************************************************/ static void grp_try_feed (eio_req *grp) { while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) { grp->flags &= ~ETP_FLAG_GROUPADD; EIO_FEED (grp); /* stop if no progress has been made */ if (!(grp->flags & ETP_FLAG_GROUPADD)) { grp->feed = 0; break; } } } static int grp_dec (eio_req *grp) { --grp->size; /* call feeder, if applicable */ grp_try_feed (grp); /* finish, if done */ if (!grp->size && grp->flags & ETP_FLAG_DELAYED) return eio_finish (grp); else return 0; } static void eio_destroy (eio_req *req) { if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); EIO_DESTROY (req); } static int eio_finish (eio_req *req) { int res = EIO_FINISH (req); if (req->grp) { int res2; eio_req *grp = req->grp; /* unlink request */ if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; if (grp->grp_first == req) grp->grp_first = req->grp_next; res2 = grp_dec (grp); if (!res) res = res2; } eio_destroy (req); return res; } void eio_grp_cancel (eio_req *grp) { etp_grp_cancel (EIO_POOL, grp); } void eio_cancel (eio_req *req) { etp_cancel (EIO_POOL, req); } void eio_submit (eio_req *req) { etp_submit (EIO_POOL, req); } unsigned int eio_nreqs (void) { return etp_nreqs (EIO_POOL); } unsigned int eio_nready (void) { return etp_nready (EIO_POOL); } unsigned int eio_npending (void) { return etp_npending (EIO_POOL); } unsigned int ecb_cold eio_nthreads (void) { return etp_nthreads (EIO_POOL); } void ecb_cold eio_set_max_poll_time (double nseconds) { etp_set_max_poll_time (EIO_POOL, nseconds); } void ecb_cold eio_set_max_poll_reqs (unsigned int maxreqs) { etp_set_max_poll_reqs (EIO_POOL, maxreqs); } void ecb_cold eio_set_max_idle (unsigned int nthreads) { etp_set_max_idle (EIO_POOL, nthreads); } void ecb_cold eio_set_idle_timeout (unsigned int seconds) { etp_set_idle_timeout (EIO_POOL, seconds); } void ecb_cold eio_set_min_parallel (unsigned int nthreads) { etp_set_min_parallel (EIO_POOL, nthreads); } void ecb_cold eio_set_max_parallel (unsigned int nthreads) { etp_set_max_parallel (EIO_POOL, nthreads); } int eio_poll (void) { return etp_poll (EIO_POOL); } /*****************************************************************************/ /* work around various missing functions */ #if HAVE_POSIX_CLOSE && !__linux # define eio__close(fd) posix_close (fd, 0) #else # define eio__close(fd) close (fd) #endif /* close() without disturbing errno */ static void silent_close (int fd) { int saved_errno = errno; eio__close (fd); errno = saved_errno; } #ifndef HAVE_UTIMES # undef utimes # define utimes(path,times) eio__utimes (path, times) static int eio__utimes (const char *filename, const struct timeval times[2]) { if (times) { struct utimbuf buf; buf.actime = times[0].tv_sec; buf.modtime = times[1].tv_sec; return utime (filename, &buf); } else return utime (filename, 0); } #endif #ifndef HAVE_FUTIMES # undef futimes # define futimes(fd,times) eio__futimes (fd, times) static int eio__futimes (int fd, const struct timeval tv[2]) { errno = ENOSYS; return -1; } #endif #if !HAVE_FDATASYNC # undef fdatasync # define fdatasync(fd) fsync (fd) #endif static int eio__syncfs (int fd) { int res; #if HAVE_SYS_SYNCFS res = (int)syscall (__NR_syncfs, (int)(fd)); #else res = EIO_ENOSYS (); #endif if (res < 0 && errno == ENOSYS && fd >= 0) sync (); return res; } /* sync_file_range always needs emulation */ static int eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) { #if HAVE_SYNC_FILE_RANGE int res; if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER) { flags = 0 | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0) | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0) | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0); } res = sync_file_range (fd, offset, nbytes, flags); if (!res || errno != ENOSYS) return res; #endif /* even though we could play tricks with the flags, it's better to always * call fdatasync, as that matches the expectation of its users best */ return fdatasync (fd); } static int eio__fallocate (int fd, int mode, off_t offset, size_t len) { #if HAVE_LINUX_FALLOCATE return fallocate (fd, mode, offset, len); #else return EIO_ENOSYS (); #endif } #if !HAVE_READAHEAD # undef readahead # define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) static eio_ssize_t eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) { size_t todo = count; dBUF; while (todo > 0) { size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; pread (fd, eio_buf, len, offset); offset += len; todo -= len; } FUBd; /* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */ /* but not for e.g. EIO or eof, so we also never fail */ return 0; } #endif /* sendfile always needs emulation */ static eio_ssize_t eio__sendfile (int ofd, int ifd, off_t offset, size_t count) { eio_ssize_t written = 0; eio_ssize_t res; if (!count) return 0; for (;;) { #ifdef __APPLE__ # undef HAVE_SENDFILE /* broken, as everything on os x */ #endif #if HAVE_SENDFILE # if __linux off_t soffset = offset; res = sendfile (ofd, ifd, &soffset, count); # elif __FreeBSD__ /* * Of course, the freebsd sendfile is a dire hack with no thoughts * wasted on making it similar to other I/O functions. */ off_t sbytes; res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); #if 0 /* according to the manpage, this is correct, but broken behaviour */ /* freebsd' sendfile will return 0 on success */ /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ /* not on e.g. EIO or EPIPE - sounds broken */ if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) res = sbytes; #endif /* according to source inspection, this is correct, and useful behaviour */ if (sbytes) res = sbytes; # elif defined __APPLE__ off_t sbytes = count; res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); /* according to the manpage, sbytes is always valid */ if (sbytes) res = sbytes; # elif __hpux res = sendfile (ofd, ifd, offset, count, 0, 0); # elif __solaris struct sendfilevec vec; size_t sbytes; vec.sfv_fd = ifd; vec.sfv_flag = 0; vec.sfv_off = offset; vec.sfv_len = count; res = sendfilev (ofd, &vec, 1, &sbytes); if (res < 0 && sbytes) res = sbytes; # endif #elif defined (_WIN32) && 0 /* does not work, just for documentation of what would need to be done */ /* actually, cannot be done like this, as TransmitFile changes the file offset, */ /* libeio guarantees that the file offset does not change, and windows */ /* has no way to get an independent handle to the same file description */ HANDLE h = TO_SOCKET (ifd); SetFilePointer (h, offset, 0, FILE_BEGIN); res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); #else res = EIO_ENOSYS (); #endif /* we assume sendfile can copy at least 128mb in one go */ if (res <= 128 * 1024 * 1024) { if (res > 0) written += res; if (written) return written; break; } else { /* if we requested more, then probably the kernel was lazy */ written += res; offset += res; count -= res; if (!count) return written; } } if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK /* BSDs */ #ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ || errno == ENOTSUP #endif #ifdef EOPNOTSUPP /* windows */ || errno == EOPNOTSUPP /* BSDs */ #endif #if __solaris || errno == EAFNOSUPPORT || errno == EPROTOTYPE #endif ) ) { /* emulate sendfile. this is a major pain in the ass */ dBUF; res = 0; while (count) { eio_ssize_t cnt; cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); if (cnt <= 0) { if (cnt && !res) res = -1; break; } cnt = write (ofd, eio_buf, cnt); if (cnt <= 0) { if (cnt && !res) res = -1; break; } offset += cnt; res += cnt; count -= cnt; } FUBd; } return res; } #ifdef PAGESIZE # define eio_pagesize() PAGESIZE #else static intptr_t eio_pagesize (void) { static intptr_t page; if (!page) page = sysconf (_SC_PAGESIZE); return page; } #endif static void eio_page_align (void **addr, size_t *length) { intptr_t mask = eio_pagesize () - 1; /* round down addr */ intptr_t adj = mask & (intptr_t)*addr; *addr = (void *)((intptr_t)*addr - adj); *length += adj; /* round up length */ *length = (*length + mask) & ~mask; } #if !_POSIX_MEMLOCK # define eio__mlockall(a) EIO_ENOSYS () #else static int eio__mlockall (int flags) { #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7 extern int mallopt (int, int); mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */ #endif if (EIO_MCL_CURRENT != MCL_CURRENT || EIO_MCL_FUTURE != MCL_FUTURE) { flags = 0 | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0) | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0); } return mlockall (flags); } #endif #if !_POSIX_MEMLOCK_RANGE # define eio__mlock(a,b) EIO_ENOSYS () #else static int eio__mlock (void *addr, size_t length) { eio_page_align (&addr, &length); return mlock (addr, length); } #endif #if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) # define eio__msync(a,b,c) EIO_ENOSYS () #else static int eio__msync (void *mem, size_t len, int flags) { eio_page_align (&mem, &len); if (EIO_MS_ASYNC != MS_SYNC || EIO_MS_INVALIDATE != MS_INVALIDATE || EIO_MS_SYNC != MS_SYNC) { flags = 0 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0) | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0) | (flags & EIO_MS_SYNC ? MS_SYNC : 0); } return msync (mem, len, flags); } #endif static int eio__mtouch (eio_req *req) { void *mem = req->ptr2; size_t len = req->size; int flags = req->int1; eio_page_align (&mem, &len); { intptr_t addr = (intptr_t)mem; intptr_t end = addr + len; intptr_t page = eio_pagesize (); if (addr < end) if (flags & EIO_MT_MODIFY) /* modify */ do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < end && !EIO_CANCELLED (req)); else do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < end && !EIO_CANCELLED (req)); } return 0; } /*****************************************************************************/ /* requests implemented outside eio_execute, because they are so large */ static void eio__lseek (eio_req *req) { /* this usually gets optimised away completely, or your compiler sucks, */ /* or the whence constants really are not 0, 1, 2 */ int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET : req->int2 == EIO_SEEK_CUR ? SEEK_CUR : req->int2 == EIO_SEEK_END ? SEEK_END : req->int2; req->offs = lseek (req->int1, req->offs, whence); req->result = req->offs == (off_t)-1 ? -1 : 0; } /* result will always end up in tmpbuf, there is always space for adding a 0-byte */ static int eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) { char *res; const char *rel = path; char *tmp1, *tmp2; #if SYMLOOP_MAX > 32 int symlinks = SYMLOOP_MAX; #else int symlinks = 32; #endif errno = EINVAL; if (!rel) return -1; errno = ENOENT; if (!*rel) return -1; res = etp_tmpbuf_get (tmpbuf, EIO_PATH_MAX * 3); #ifdef _WIN32 if (_access (rel, 4) != 0) return -1; symlinks = GetFullPathName (rel, EIO_PATH_MAX * 3, res, 0); errno = ENAMETOOLONG; if (symlinks >= EIO_PATH_MAX * 3) return -1; errno = EIO; if (symlinks <= 0) return -1; return symlinks; #else tmp1 = res + EIO_PATH_MAX; tmp2 = tmp1 + EIO_PATH_MAX; #if 0 /* disabled, the musl way to do things is just too racy */ #if __linux && defined(O_NONBLOCK) && defined(O_NOATIME) /* on linux we may be able to ask the kernel */ { int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME); if (fd >= 0) { sprintf (tmp1, "/proc/self/fd/%d", fd); req->result = readlink (tmp1, res, EIO_PATH_MAX); /* here we should probably stat the open file and the disk file, to make sure they still match */ eio__close (fd); if (req->result > 0) goto done; } else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) return -1; } #endif #endif if (*rel != '/') { int len; errno = ENOENT; if (wd == EIO_INVALID_WD) return -1; if (wd == EIO_CWD) { if (!getcwd (res, EIO_PATH_MAX)) return -1; len = strlen (res); } else memcpy (res, wd->str, len = wd->len); if (res [1]) /* only use if not / */ res += len; } while (*rel) { eio_ssize_t len, linklen; const char *beg = rel; while (*rel && *rel != '/') ++rel; len = rel - beg; if (!len) /* skip slashes */ { ++rel; continue; } if (beg [0] == '.') { if (len == 1) continue; /* . - nop */ if (beg [1] == '.' && len == 2) { /* .. - back up one component, if possible */ while (res != tmpbuf->ptr) if (*--res == '/') break; continue; } } errno = ENAMETOOLONG; if (res + 1 + len + 1 >= tmp1) return -1; /* copy one component */ *res = '/'; memcpy (res + 1, beg, len); /* zero-terminate, for readlink */ res [len + 1] = 0; /* now check if it's a symlink */ linklen = readlink (tmpbuf->ptr, tmp1, EIO_PATH_MAX); if (linklen < 0) { if (errno != EINVAL) return -1; /* it's a normal directory. hopefully */ res += len + 1; } else { /* yay, it was a symlink - build new path in tmp2 */ int rellen = strlen (rel); errno = ENAMETOOLONG; if (linklen + 1 + rellen >= EIO_PATH_MAX) /* also catch linklen >= EIO_PATH_MAX */ return -1; errno = ELOOP; if (!--symlinks) return -1; if (*tmp1 == '/') res = tmpbuf->ptr; /* symlink resolves to an absolute path */ /* we need to be careful, as rel might point into tmp2 already */ memmove (tmp2 + linklen + 1, rel, rellen + 1); tmp2 [linklen] = '/'; memcpy (tmp2, tmp1, linklen); rel = tmp2; } } /* special case for the lone root path */ if (res == tmpbuf->ptr) *res++ = '/'; return res - (char *)tmpbuf->ptr; #endif } static signed char eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) { return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */ : a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; } #define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0 #define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */ #define EIO_SORT_FAST 60 /* when to only use insertion sort */ static void eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) { unsigned char bits [9 + sizeof (eio_ino_t) * 8]; unsigned char *bit = bits; assert (CHAR_BIT == 8); assert (sizeof (eio_dirent) * 8 < 256); assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */ assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */ if (size <= EIO_SORT_FAST) return; /* first prepare an array of bits to test in our radix sort */ /* try to take endianness into account, as well as differences in eio_ino_t sizes */ /* inode_bits must contain all inodes ORed together */ /* which is used to skip bits that are 0 everywhere, which is very common */ { eio_ino_t endianness; int i, j; /* we store the byte offset of byte n into byte n of "endianness" */ for (i = 0; i < sizeof (eio_ino_t); ++i) ((unsigned char *)&endianness)[i] = i; *bit++ = 0; for (i = 0; i < sizeof (eio_ino_t); ++i) { /* shifting off the byte offsets out of "endianness" */ int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8; endianness >>= 8; for (j = 0; j < 8; ++j) if (inode_bits & (((eio_ino_t)1) << (i * 8 + j))) *bit++ = offs + j; } for (j = 0; j < 8; ++j) if (score_bits & (1 << j)) *bit++ = offsetof (eio_dirent, score) * 8 + j; } /* now actually do the sorting (a variant of MSD radix sort) */ { eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base; eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end; unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8]; int stk_idx = 0; base_stk [stk_idx] = dents; end_stk [stk_idx] = dents + size; bit_stk [stk_idx] = bit - 1; do { base = base_stk [stk_idx]; end = end_stk [stk_idx]; bit = bit_stk [stk_idx]; for (;;) { unsigned char O = *bit >> 3; unsigned char M = 1 << (*bit & 7); eio_dirent *a = base; eio_dirent *b = end; if (b - a < EIO_SORT_CUTOFF) break; /* now bit-partition the array on the bit */ /* this ugly asymmetric loop seems to perform much better than typical */ /* partition algos found in the literature */ do if (!(((unsigned char *)a)[O] & M)) ++a; else if (!(((unsigned char *)--b)[O] & M)) { eio_dirent tmp = *a; *a = *b; *b = tmp; ++a; } while (b > a); /* next bit, or stop, if no bits left in this path */ if (!*--bit) break; base_stk [stk_idx] = a; end_stk [stk_idx] = end; bit_stk [stk_idx] = bit; ++stk_idx; end = a; } } while (stk_idx--); } } static void eio_dent_insertion_sort (eio_dirent *dents, int size) { /* first move the smallest element to the front, to act as a sentinel */ { int i; eio_dirent *min = dents; /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */ for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; ) if (EIO_DENT_CMP (dents [i], <, *min)) min = &dents [i]; /* swap elements 0 and j (minimum) */ { eio_dirent tmp = *dents; *dents = *min; *min = tmp; } } /* then do standard insertion sort, assuming that all elements are >= dents [0] */ { eio_dirent *i, *j; for (i = dents + 1; i < dents + size; ++i) { eio_dirent value = *i; for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j) j [1] = j [0]; j [1] = value; } } } static void eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) { if (size <= 1) return; /* our insertion sort relies on size > 0 */ /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */ /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */ eio_dent_radix_sort (dents, size, score_bits, inode_bits); /* use an insertion sort at the end, or for small arrays, */ /* as insertion sort is more efficient for small partitions */ eio_dent_insertion_sort (dents, size); } /* read a full directory */ static void eio__scandir (eio_req *req, etp_worker *self) { char *name, *names; int namesalloc = 4096 - sizeof (void *) * 4; int namesoffs = 0; int flags = req->int1; eio_dirent *dents = 0; int dentalloc = 128; int dentoffs = 0; eio_ino_t inode_bits = 0; #ifdef _WIN32 HANDLE dirp; WIN32_FIND_DATA entp; #else DIR *dirp; EIO_STRUCT_DIRENT *entp; #endif req->result = -1; if (!(flags & EIO_READDIR_DENTS)) flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); #ifdef _WIN32 { int len = strlen ((const char *)req->ptr1); char *path = malloc (MAX_PATH); const char *fmt; const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1); if (!len) fmt = "./*"; else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\') fmt = "%s*"; else fmt = "%s/*"; _snprintf (path, MAX_PATH, fmt, reqpath); dirp = FindFirstFile (path, &entp); free (path); if (dirp == INVALID_HANDLE_VALUE) { /* should steal _dosmaperr */ switch (GetLastError ()) { case ERROR_FILE_NOT_FOUND: req->result = 0; break; case ERROR_INVALID_NAME: case ERROR_PATH_NOT_FOUND: case ERROR_NO_MORE_FILES: errno = ENOENT; break; case ERROR_NOT_ENOUGH_MEMORY: errno = ENOMEM; break; default: errno = EINVAL; break; } return; } } #else #if HAVE_AT if (req->wd) { int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY); if (fd < 0) return; dirp = fdopendir (fd); if (!dirp) silent_close (fd); } else dirp = opendir (req->ptr1); #else dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1)); #endif if (!dirp) return; #endif if (req->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; req->ptr2 = names = malloc (namesalloc); if (!names || (flags && !dents)) return; for (;;) { int done; #ifdef _WIN32 done = !dirp; #else errno = 0; entp = readdir (dirp); done = !entp; #endif if (done) { #ifndef _WIN32 int old_errno = errno; closedir (dirp); errno = old_errno; if (errno) break; #endif /* sort etc. */ req->int1 = flags; req->result = dentoffs; if (flags & EIO_READDIR_STAT_ORDER) eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits); else if (flags & EIO_READDIR_DIRS_FIRST) if (flags & EIO_READDIR_FOUND_UNKNOWN) eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */ else { /* in this case, all is known, and we just put dirs first and sort them */ eio_dirent *oth = dents + dentoffs; eio_dirent *dir = dents; /* now partition dirs to the front, and non-dirs to the back */ /* by walking from both sides and swapping if necessary */ while (oth > dir) { if (dir->type == EIO_DT_DIR) ++dir; else if ((--oth)->type == EIO_DT_DIR) { eio_dirent tmp = *dir; *dir = *oth; *oth = tmp; ++dir; } } /* now sort the dirs only (dirs all have the same score) */ eio_dent_sort (dents, dir - dents, 0, inode_bits); } break; } /* now add the entry to our list(s) */ name = D_NAME (entp); /* skip . and .. entries */ if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) { int len = D_NAMLEN (entp) + 1; while (ecb_expect_false (namesoffs + len > namesalloc)) { namesalloc *= 2; req->ptr2 = names = realloc (names, namesalloc); if (!names) break; } memcpy (names + namesoffs, name, len); if (dents) { struct eio_dirent *ent; if (ecb_expect_false (dentoffs == dentalloc)) { dentalloc *= 2; req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); if (!dents) break; } ent = dents + dentoffs; ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */ ent->namelen = len - 1; ent->inode = D_INO (entp); inode_bits |= ent->inode; switch (D_TYPE (entp)) { default: ent->type = EIO_DT_UNKNOWN; flags |= EIO_READDIR_FOUND_UNKNOWN; break; #ifdef DT_FIFO case DT_FIFO: ent->type = EIO_DT_FIFO; break; #endif #ifdef DT_CHR case DT_CHR: ent->type = EIO_DT_CHR; break; #endif #ifdef DT_MPC case DT_MPC: ent->type = EIO_DT_MPC; break; #endif #ifdef DT_DIR case DT_DIR: ent->type = EIO_DT_DIR; break; #endif #ifdef DT_NAM case DT_NAM: ent->type = EIO_DT_NAM; break; #endif #ifdef DT_BLK case DT_BLK: ent->type = EIO_DT_BLK; break; #endif #ifdef DT_MPB case DT_MPB: ent->type = EIO_DT_MPB; break; #endif #ifdef DT_REG case DT_REG: ent->type = EIO_DT_REG; break; #endif #ifdef DT_NWK case DT_NWK: ent->type = EIO_DT_NWK; break; #endif #ifdef DT_CMP case DT_CMP: ent->type = EIO_DT_CMP; break; #endif #ifdef DT_LNK case DT_LNK: ent->type = EIO_DT_LNK; break; #endif #ifdef DT_SOCK case DT_SOCK: ent->type = EIO_DT_SOCK; break; #endif #ifdef DT_DOOR case DT_DOOR: ent->type = EIO_DT_DOOR; break; #endif #ifdef DT_WHT case DT_WHT: ent->type = EIO_DT_WHT; break; #endif } ent->score = 7; if (flags & EIO_READDIR_DIRS_FIRST) { if (ent->type == EIO_DT_UNKNOWN) { if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ ent->score = 1; else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */ ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */ } else if (ent->type == EIO_DT_DIR) ent->score = 0; } } namesoffs += len; ++dentoffs; } if (EIO_CANCELLED (req)) { errno = ECANCELED; break; } #ifdef _WIN32 if (!FindNextFile (dirp, &entp)) { FindClose (dirp); dirp = 0; } #endif } } /*****************************************************************************/ /* working directory stuff */ /* various deficiencies in the posix 2008 api force us to */ /* keep the absolute path in string form at all times */ /* fuck yeah. */ #if !HAVE_AT /* a bit like realpath, but usually faster because it doesn'T have to return */ /* an absolute or canonical path */ static const char * wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) { if (!wd || *path == '/') return path; if (path [0] == '.' && !path [1]) return wd->str; { int l1 = wd->len; int l2 = strlen (path); char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2); memcpy (res, wd->str, l1); res [l1] = '/'; memcpy (res + l1 + 1, path, l2 + 1); return res; } } #endif static eio_wd eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) { int fd; eio_wd res; int len = eio__realpath (tmpbuf, wd, path); if (len < 0) return EIO_INVALID_WD; #if HAVE_AT fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY); if (fd < 0) return EIO_INVALID_WD; #endif res = malloc (sizeof (*res) + len); /* one extra 0-byte */ #if HAVE_AT res->fd = fd; #endif res->len = len; memcpy (res->str, tmpbuf->ptr, len); res->str [len] = 0; return res; } eio_wd eio_wd_open_sync (eio_wd wd, const char *path) { struct etp_tmpbuf tmpbuf = { 0 }; wd = eio__wd_open_sync (&tmpbuf, wd, path); free (tmpbuf.ptr); return wd; } void eio_wd_close_sync (eio_wd wd) { if (wd != EIO_INVALID_WD && wd != EIO_CWD) { #if HAVE_AT eio__close (wd->fd); #endif free (wd); } } #if HAVE_AT static int eio__renameat2 (int olddirfd, const char *oldpath, int newdirfd, const char *newpath, unsigned int flags) { #if HAVE_RENAMEAT2 return syscall (SYS_renameat2, olddirfd, oldpath, newdirfd, newpath, flags); #else if (flags) return EIO_ENOSYS (); return renameat (olddirfd, oldpath, newdirfd, newpath); #endif } /* they forgot these */ static int eio__truncateat (int dirfd, const char *path, off_t length) { int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC); int res; if (fd < 0) return fd; res = ftruncate (fd, length); silent_close (fd); return res; } static int eio__statvfsat (int dirfd, const char *path, struct statvfs *buf) { int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC); int res; if (fd < 0) return fd; res = fstatvfs (fd, buf); silent_close (fd); return res; } #endif /*****************************************************************************/ #define ALLOC(len) \ if (!req->ptr2) \ { \ X_LOCK (EIO_POOL->wrklock); \ req->flags |= EIO_FLAG_PTR2_FREE; \ X_UNLOCK (EIO_POOL->wrklock); \ req->ptr2 = malloc (len); \ if (!req->ptr2) \ { \ errno = ENOMEM; \ req->result = -1; \ goto alloc_fail; \ } \ } /*****************************************************************************/ static void eio__slurp (int fd, eio_req *req) { req->result = fd; if (fd < 0) return; if (req->offs < 0 || !req->size) /* do we need the size? */ { off_t size = lseek (fd, 0, SEEK_END); if (req->offs < 0) req->offs += size; if (!req->size) req->size = size - req->offs; } ALLOC (req->size); req->result = pread (fd, req->ptr2, req->size, req->offs); silent_close (fd); alloc_fail: ; } int ecb_cold eio_init (void (*want_poll)(void), void (*done_poll)(void)) { eio_want_poll_cb = want_poll; eio_done_poll_cb = done_poll; return etp_init (EIO_POOL, 0, 0, 0); } ecb_inline void eio_api_destroy (eio_req *req) { free (req); } #define REQ(rtype) \ eio_req *req; \ \ req = (eio_req *)calloc (1, sizeof *req); \ if (!req) \ return 0; \ \ req->type = rtype; \ req->pri = pri; \ req->finish = cb; \ req->data = data; \ req->destroy = eio_api_destroy; #define SEND eio_submit (req); return req #define PATH \ req->flags |= EIO_FLAG_PTR1_FREE; \ req->ptr1 = strdup (path); \ if (!req->ptr1) \ { \ eio_api_destroy (req); \ return 0; \ } #define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)]) static void eio_execute (etp_worker *self, eio_req *req) { #if HAVE_AT int dirfd; #else const char *path; #endif if (ecb_expect_false (EIO_CANCELLED (req))) { req->result = -1; req->errorno = ECANCELED; return; } if (ecb_expect_false (req->wd == EIO_INVALID_WD)) { req->result = -1; req->errorno = ENOENT; return; } if (req->type >= EIO_OPEN) { #if HAVE_AT dirfd = WD2FD (req->wd); #else path = wd_expand (&self->tmpbuf, req->wd, req->ptr1); #endif } switch (req->type) { case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1); req->result = req->wd == EIO_INVALID_WD ? -1 : 0; break; case EIO_WD_CLOSE: req->result = 0; eio_wd_close_sync (req->wd); break; case EIO_SEEK: eio__lseek (req); break; case EIO_READ: ALLOC (req->size); req->result = req->offs >= 0 ? pread (req->int1, req->ptr2, req->size, req->offs) : read (req->int1, req->ptr2, req->size); break; case EIO_WRITE: req->result = req->offs >= 0 ? pwrite (req->int1, req->ptr2, req->size, req->offs) : write (req->int1, req->ptr2, req->size); break; case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break; case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break; case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break; #if HAVE_AT case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break; case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break; case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break; case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break; case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break; case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break; case EIO_SLURP: eio__slurp ( openat (dirfd, req->ptr1, O_RDONLY | O_CLOEXEC), req); break; case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break; case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */ req->result = req->wd && SINGLEDOT (req->ptr1) ? rmdir (req->wd->str) : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break; case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break; case EIO_RENAME: req->result = eio__renameat2 ( dirfd, /* complications arise because "." cannot be renamed, so we might have to expand */ req->wd && SINGLEDOT (req->ptr1) ? req->wd->str : req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, req->int2 ); break; case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break; case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break; case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; case EIO_READLINK: ALLOC (EIO_PATH_MAX); req->result = readlinkat (dirfd, req->ptr1, req->ptr2, EIO_PATH_MAX); if (req->result == EIO_PATH_MAX) { req->result = -1; errno = ENAMETOOLONG; } break; case EIO_UTIME: case EIO_FUTIME: { struct timespec ts[2]; struct timespec *times; if (req->nv1 != -1. || req->nv2 != -1.) { ts[0].tv_sec = req->nv1; ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9; ts[1].tv_sec = req->nv2; ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9; times = ts; } else times = 0; req->result = req->type == EIO_FUTIME ? futimens (req->int1, times) : utimensat (dirfd, req->ptr1, times, 0); } break; #else case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break; case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break; case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break; case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break; case EIO_TRUNCATE: req->result = truncate (path , req->offs); break; case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break; case EIO_SLURP: eio__slurp ( open (path , O_RDONLY | O_CLOEXEC), req); break; case EIO_UNLINK: req->result = unlink (path ); break; case EIO_RMDIR: req->result = rmdir (path ); break; case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break; case EIO_RENAME: req->result = req->int2 ? EIO_ENOSYS () : rename (path, req->ptr2); break; case EIO_LINK: req->result = link (path , req->ptr2); break; case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break; case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break; case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break; case EIO_READLINK: ALLOC (EIO_PATH_MAX); req->result = readlink (path, req->ptr2, EIO_PATH_MAX); if (req->result == EIO_PATH_MAX) { req->result = -1; errno = ENAMETOOLONG; } break; case EIO_UTIME: case EIO_FUTIME: { struct timeval tv[2]; struct timeval *times; if (req->nv1 != -1. || req->nv2 != -1.) { tv[0].tv_sec = req->nv1; tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6; tv[1].tv_sec = req->nv2; tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6; times = tv; } else times = 0; req->result = req->type == EIO_FUTIME ? futimes (req->int1, times) : utimes (req->ptr1, times); } break; #endif case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1))) { ALLOC (req->result); memcpy (req->ptr2, self->tmpbuf.ptr, req->result); } break; case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break; case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; case EIO_CLOSE: req->result = eio__close (req->int1); break; case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; case EIO_SYNC: req->result = 0; sync (); break; case EIO_FSYNC: req->result = fsync (req->int1); break; case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break; case EIO_MTOUCH: req->result = eio__mtouch (req); break; case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break; case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break; case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break; case EIO_READDIR: eio__scandir (req, self); break; case EIO_BUSY: #ifdef _WIN32 Sleep (req->nv1 * 1e3); #else { struct timeval tv; tv.tv_sec = req->nv1; tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6; req->result = select (0, 0, 0, 0, &tv); } #endif break; #if 0 case EIO_GROUP: abort (); /* handled in eio_request */ #endif case EIO_NOP: req->result = 0; break; case EIO_CUSTOM: req->feed (req); break; default: req->result = EIO_ENOSYS (); break; } alloc_fail: req->errorno = errno; } #ifndef EIO_NO_WRAPPERS eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data) { REQ (EIO_WD_OPEN); PATH; SEND; } eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data) { REQ (EIO_WD_CLOSE); req->wd = wd; SEND; } eio_req *eio_nop (int pri, eio_cb cb, void *data) { REQ (EIO_NOP); SEND; } eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data) { REQ (EIO_BUSY); req->nv1 = delay; SEND; } eio_req *eio_sync (int pri, eio_cb cb, void *data) { REQ (EIO_SYNC); SEND; } eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FSYNC); req->int1 = fd; SEND; } eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) { REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; } eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FDATASYNC); req->int1 = fd; SEND; } eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_SYNCFS); req->int1 = fd; SEND; } eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) { REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; } eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) { REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; } eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) { REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND; } eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data) { REQ (EIO_MLOCKALL); req->int1 = flags; SEND; } eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data) { REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND; } eio_req *eio_close (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_CLOSE); req->int1 = fd; SEND; } eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data) { REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; } eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data) { REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND; } eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; } eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; } eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data) { REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND; } eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data) { REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND; } eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FSTAT); req->int1 = fd; SEND; } eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FSTATVFS); req->int1 = fd; SEND; } eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) { REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; } eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND; } eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; } eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) { REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; } eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) { REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND; } eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data) { REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND; } eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND; } eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data) { REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND; } eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; } eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) { REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; } eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND; } eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND; } static eio_req * eio__1path (int type, const char *path, int pri, eio_cb cb, void *data) { REQ (type); PATH; SEND; } eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_READLINK, path, pri, cb, data); } eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_REALPATH, path, pri, cb, data); } eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_STAT, path, pri, cb, data); } eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_LSTAT, path, pri, cb, data); } eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_STATVFS, path, pri, cb, data); } eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_UNLINK, path, pri, cb, data); } eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_RMDIR, path, pri, cb, data); } eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data) { REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; } eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) { REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND; } static eio_req * eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) { REQ (type); PATH; req->flags |= EIO_FLAG_PTR2_FREE; req->ptr2 = strdup (new_path); if (!req->ptr2) { eio_api_destroy (req); return 0; } SEND; } eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data) { return eio__2path (EIO_LINK, path, new_path, pri, cb, data); } eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data) { return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data); } eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) { return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); } eio_req *eio_slurp (const char *path, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_SLURP); PATH; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; } eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) { REQ (EIO_CUSTOM); req->feed = execute; SEND; } #endif eio_req *eio_grp (eio_cb cb, void *data) { const int pri = EIO_PRI_MAX; REQ (EIO_GROUP); SEND; } #undef REQ #undef PATH #undef SEND /*****************************************************************************/ /* grp functions */ void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) { grp->int2 = limit; grp->feed = feed; grp_try_feed (grp); } void eio_grp_limit (eio_req *grp, int limit) { grp->int2 = limit; grp_try_feed (grp); } void eio_grp_add (eio_req *grp, eio_req *req) { assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); grp->flags |= ETP_FLAG_GROUPADD; ++grp->size; req->grp = grp; req->grp_prev = 0; req->grp_next = grp->grp_first; if (grp->grp_first) grp->grp_first->grp_prev = req; grp->grp_first = req; } /*****************************************************************************/ /* misc garbage */ eio_ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) { return eio__sendfile (ofd, ifd, offset, count); }