pike.git/src/modules/_Stdio/sendfile.c:fb254695ec4ce60e19dc8bdfa1683a13707be950

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ /*! @module Stdio */ /*! @class sendfile *! *! Send @expr{headers + from_fd[off..off+len-1] + trailers@} to *! @expr{to_fd@} asyncronously. *! *! @note *! This is the low-level implementation, which has several limitations. *! You probably want to use @[Stdio.sendfile()] instead. *! *! @seealso *! @[Stdio.sendfile()] */ /* * FIXME: * Support for NT. * * Need to lock the fd's so that the user can't close them for us. */ #include "global.h" #include "file_machine.h" #include "fdlib.h" #include "fd_control.h" #include "object.h" #include "array.h" #include "threads.h" #include "interpret.h" #include "svalue.h" #include "callback.h" #include "backend.h" #include "module_support.h" #include "bignum.h" #include "file.h" #include <errno.h> #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif /* HAVE_SYS_PARAM_H */ #include <sys/stat.h> #ifdef HAVE_SYS_SOCKET_H #include <sys/socket.h> #endif /* HAVE_SYS_SOCKET_H */ #ifdef HAVE_SYS_UIO_H #include <sys/uio.h> #endif /* HAVE_SYS_UIO_H */ #ifdef HAVE_NETINET_TCP_H #include <netinet/tcp.h> #endif /* HAVE_NETINET_TCP_H */ #ifdef HAVE_SYS_SENDFILE_H #ifndef HAVE_BROKEN_SYS_SENDFILE_H #include <sys/sendfile.h> #endif /* !HAVE_BROKEN_SYS_SENDFILE_H */ #endif /* HAVE_SYS_SENDFILE_H */ #if 0 #ifdef HAVE_SYS_MMAN_H #include <sys/mman.h> #else /* !HAVE_SYS_MMAN_H */ #ifdef HAVE_LINUX_MMAN_H #include <linux/mman.h> #else /* !HAVE_LINUX_MMAN_H */ #ifdef HAVE_MMAP /* sys/mman.h is _probably_ there anyway. */ #include <sys/mman.h> #endif /* HAVE_MMAP */ #endif /* HAVE_LINUX_MMAN_H */ #endif /* HAVE_SYS_MMAN_H */ #endif #define sp Pike_sp /* #define SF_DEBUG */ #ifdef SF_DEBUG #define SF_DFPRINTF(X) fprintf X #else /* !SF_DEBUG */ #define SF_DFPRINTF(X) #endif /* SF_DEBUG */ #define BUF_SIZE 0x00010000 /* 64K */ #define MMAP_SIZE 0x00100000 /* 1M */ #ifndef MAP_FAILED #define MAP_FAILED ((void *)-1) #endif /* !MAP_FAILED */ #ifndef MAP_FILE #define MAP_FILE 0 #endif /* !MAP_FILE */ #if !defined(SOL_TCP) && defined(IPPROTO_TCP) /* SOL_TCP isn't defined in Solaris. */ #define SOL_TCP IPPROTO_TCP #endif /* * Only support for threaded operation right now. */ #ifdef _REENTRANT #undef THIS #define THIS ((struct pike_sendfile *)(Pike_fp->current_storage)) /* * We assume sendfile(2) has been fixed on all OS's by now. * FIXME: Configure tests? * /grubba 2004-03-30 */ #if 0 /* * All known versions of sendfile(2) are broken. * /grubba 2000-10-19 */ #ifndef HAVE_BROKEN_SENDFILE #define HAVE_BROKEN_SENDFILE #endif /* !HAVE_BROKEN_SENDFILE */ #endif /* 0 */ /* * Disable any use of sendfile(2) if HAVE_BROKEN_SENDFILE is defined. */ #ifdef HAVE_BROKEN_SENDFILE #undef HAVE_SENDFILE #undef HAVE_FREEBSD_SENDFILE #undef HAVE_HPUX_SENDFILE #undef HAVE_MACOSX_SENDFILE #endif /* HAVE_BROKEN_SENDFILE */ /* * Globals */ static struct program *pike_sendfile_prog = NULL; /* * Struct init code. */ static void init_pike_sendfile(struct object *UNUSED(o)) { memset(THIS, 0, sizeof(struct pike_sendfile)); /* callback doesn't actually need to be initialized since it is a * mapped variable, but since we just zapped it with zeroes we need * to set the type to T_INT again.. /Hubbe */ SET_SVAL(THIS->callback, T_INT, NUMBER_NUMBER, integer, 0); } static void exit_pike_sendfile(struct object *UNUSED(o)) { SF_DFPRINTF((stderr, "sendfile: Exiting...\n")); if (THIS->iovs) { free(THIS->iovs); THIS->iovs = NULL; } if (THIS->buffer) { free(THIS->buffer); THIS->buffer = NULL; } if (THIS->headers) { free_array(THIS->headers); THIS->headers = NULL; } if (THIS->trailers) { free_array(THIS->trailers); THIS->trailers = NULL; } if (THIS->from_file) { free_object(THIS->from_file); THIS->from_file = NULL; } if (THIS->to_file) { free_object(THIS->to_file); THIS->to_file = NULL; } if (THIS->args) { free_array(THIS->args); THIS->args = NULL; } if (THIS->self) { /* This can occur if Pike exits before the backend has started. */ free_object(THIS->self); THIS->self = NULL; } /* This is not required since this is a mapped variable. * /Hubbe * But we do it anyway for paranoia reasons. * /grubba 1999-10-14 */ free_svalue(&(THIS->callback)); SET_SVAL(THIS->callback, T_INT, NUMBER_NUMBER, integer, 0); if (THIS->backend_callback) { remove_callback (THIS->backend_callback); THIS->backend_callback = NULL; } } /* * Fallback code */ #ifndef HAVE_WRITEV #define writev my_writev static size_t writev(int fd, struct iovec *iov, int n) { if (n) { return fd_write(fd, iov->iov_base, iov->iov_len); } return 0; } #endif /* !HAVE_WRITEV */ /* * Helper functions */ static void sf_call_callback(struct pike_sendfile *this) { debug_malloc_touch(this->args); if (TYPEOF(this->callback) != T_INT) { if (((TYPEOF(this->callback) == T_OBJECT) || ((TYPEOF(this->callback) == T_FUNCTION) && (SUBTYPEOF(this->callback) != FUNCTION_BUILTIN))) && !this->callback.u.object->prog) { /* Destructed object or function. */ free_array(this->args); this->args = NULL; } else { int sz = this->args->size; push_int64(this->sent); push_array_items(this->args); this->args = NULL; apply_svalue(&this->callback, 1 + sz); pop_stack(); } free_svalue(&this->callback); SET_SVAL(this->callback, T_INT, NUMBER_NUMBER, integer, 0); } else { free_array(this->args); this->args = NULL; } } static void call_callback_and_free(struct callback *cb, void *this_, void *UNUSED(arg)) { struct pike_sendfile *this = this_; SF_DFPRINTF((stderr, "sendfile: Calling callback...\n")); remove_callback(cb); this->backend_callback = NULL; if (this->self) { /* Make sure we get freed in case of error */ push_object(this->self); this->self = NULL; } sf_call_callback(this); /* Free ourselves */ pop_stack(); } /* * Code called in the threaded case. */ /* writev() without the IOV_MAX limit. */ static ptrdiff_t send_iov(int fd, struct iovec *iov, int iovcnt) { ptrdiff_t sent = 0; SF_DFPRINTF((stderr, "sendfile: send_iov(%d, %p, %d)...\n", fd, iov, iovcnt)); #ifdef SF_DEBUG { int cnt; for(cnt = 0; cnt < iovcnt; cnt++) { SF_DFPRINTF((stderr, "sendfile: %4d: iov_base: %p, iov_len: %ld\n", cnt, iov[cnt].iov_base, (long)iov[cnt].iov_len)); } } #endif /* SF_DEBUG */ while (iovcnt) { ptrdiff_t bytes; int cnt = iovcnt; #ifdef IOV_MAX if (cnt > IOV_MAX) cnt = IOV_MAX; #endif #ifdef DEF_IOV_MAX if (cnt > DEF_IOV_MAX) cnt = DEF_IOV_MAX; #endif #ifdef MAX_IOVEC if (cnt > MAX_IOVEC) cnt = MAX_IOVEC; #endif bytes = writev(fd, iov, cnt); if ((bytes < 0) && (errno == EINTR)) { continue; } else if (bytes < 0) { /* Error or file closed at other end. */ SF_DFPRINTF((stderr, "sendfile: send_iov(): writev() failed with errno:%d.\n" "sendfile: Sent %ld bytes so far.\n", errno, (long)sent)); return sent; } else { sent += bytes; while (bytes) { if ((size_t)bytes >= (size_t)iov->iov_len) { bytes -= iov->iov_len; iov++; iovcnt--; } else { iov->iov_base = ((char *)iov->iov_base) + bytes; iov->iov_len -= bytes; break; } } } } SF_DFPRINTF((stderr, "sendfile: send_iov(): Sent %d bytes\n", sent)); return sent; } void low_do_sendfile(struct pike_sendfile *this) { #if defined(SOL_TCP) && (defined(TCP_CORK) || defined(TCP_NODELAY)) int old_val = -1; socklen_t old_len = (socklen_t) sizeof(old_val); #ifdef TCP_CORK int new_val = 1; #else /* !TCP_CORK */ int new_val = 0; #endif /* TCP_CORK */ #endif /* SOL_TCP && (TCP_CORK || TCP_NODELAY) */ /* Make sure we're using blocking I/O */ set_nonblocking(this->to_fd, 0); #ifdef SOL_TCP #ifdef TCP_CORK /* Attempt to set the out socket into cork mode. * FIXME: Do we need to adjust TCP_NODELAY here? */ while ((getsockopt(this->to_fd, SOL_TCP, TCP_CORK, &old_val, &old_len)<0) && (errno == EINTR)) ; if (!old_val) { while ((setsockopt(this->to_fd, SOL_TCP, TCP_CORK, &new_val, sizeof(new_val))<0) && (errno == EINTR)) ; } #elif defined(TCP_NODELAY) /* Attempt to set the out socket into nagle mode. */ while ((getsockopt(this->to_fd, SOL_TCP, TCP_NODELAY, &old_val, &old_len)<0) && (errno == EINTR)) ; if (old_val == 1) { while ((setsockopt(this->to_fd, SOL_TCP, TCP_NODELAY, &new_val, sizeof(new_val))<0) && (errno == EINTR)) ; } #endif /* TCP_CORK || TCP_NODELAY */ #endif /* SOL_TCP */ SF_DFPRINTF((stderr, "sendfile: Worker started\n")); if ((this->from_file) && (this->len)) { #if defined(HAVE_FREEBSD_SENDFILE) || defined(HAVE_HPUX_SENDFILE) || defined(HAVE_MACOSX_SENDFILE) off_t sent = 0; int len = this->len; int res; #if defined(HAVE_FREEBSD_SENDFILE) || defined(HAVE_MACOSX_SENDFILE) struct sf_hdtr hdtr = { NULL, 0, NULL, 0 }; #ifdef HAVE_FREEBSD_SENDFILE SF_DFPRINTF((stderr, "sendfile: Using FreeBSD-style sendfile()\n")); #else SF_DFPRINTF((stderr, "sendfile: Using MacOS X-style sendfile()\n")); #endif if (this->hd_cnt) { hdtr.headers = this->hd_iov; hdtr.hdr_cnt = this->hd_cnt; } if (this->tr_cnt) { hdtr.trailers = this->tr_iov; hdtr.trl_cnt = this->tr_cnt; } #else /* !(HAVE_FREEBSD_SENDFILE || HAVE_MACOSX_SENDFILE) */ /* HPUX_SENDFILE */ struct iovec hdtr[2] = { NULL, 0, NULL, 0 }; SF_DFPRINTF((stderr, "sendfile: Using HP/UX-style sendfile()\n")); /* NOTE: hd_cnt/tr_cnt are always 0 or 1 since * we've joined the headers/trailers in sf_create(). */ if (this->hd_cnt) { hdtr[0].iov_base = this->hd_iov->iov_base; hdtr[0].iov_len = this->hd_iov->iov_len; } if (this->tr_cnt) { hdtr[1].iov_base = this->tr_iov->iov_base; hdtr[1].iov_len = this->tr_iov->iov_len; } #endif /* HAVE_FREEBSD_SENDFILE */ if (len < 0) { /* Send entire file. * * From FreeBSD: * The nbytes argument specifies how many bytes of the file * should be sent, with 0 having the special meaning of send * until the end of file has been reached. * * From HPUX: * nbytes is the number of bytes to be sent from the file. If * this parameter is set to zero, data from the offset to the * end of the file will be sent. * * From MacOS X: * The len argument is a value-result parameter, that * specifies how many bytes of the file should be sent and/or * how many bytes have been sent. Initially the value pointed * to by the len argument specifies how many bytes should be * sent with 0 having the special meaning to send until the * end of file has been reached. On return the value pointed * to by the len argument indicates how many bytes have been * sent. The len pointer may not be NULL. */ len = 0; } #ifdef HAVE_SENDFILE_HEADER_LEN_PROBLEM if (len) { /* Adjust the length to account for the length of the headers. */ /* From FreeBSD 7.x src/sys/kern/uipc_syscalls.c:kern_sendfile(): * * In FBSD < 5.0 the nbytes to send also included * the header. If compat is specified subtract the * header size from nbytes. */ /* From MacOS X 10.5.6 xnu/bsd/kern/uipc_syscalls.c:sendfile(): * * Get number of bytes to send * Should it applies to size of header and trailer? * JMM - error handling? */ for (res = 0; res < this->hd_cnt; res ++) { len += this->hd_iov[res].iov_len; } } #endif do { #ifdef HAVE_FREEBSD_SENDFILE res = sendfile(this->from_fd, this->to_fd, this->offset, len, &hdtr, &sent, 0); #else /* !HAVE_FREEBSD_SENDFILE */ #ifdef HAVE_MACOSX_SENDFILE sent = len; res = sendfile(this->from_fd, this->to_fd, this->offset, &sent, &hdtr, 0); #else /* HPUX_SENDFILE */ res = sendfile(this->to_fd, this->from_fd, this->offset, len, hdtr, 0); #endif /* HAVE_MACOSX_SENDFILE */ #endif /* HAVE_FREEBSD_SENDFILE */ SF_DFPRINTF((stderr, "sendfile: sendfile() returned %d\n", res)); } while ((res < 0) && (errno == EINTR)); if (res < 0) { switch(errno) { default: case ENOTSOCK: case EINVAL: /* Try doing it by hand instead. */ goto fallback; break; case EFAULT: /* Bad arguments */ #ifdef HAVE_FREEBSD_SENDFILE Pike_fatal("FreeBSD style sendfile(): EFAULT\n"); #else /* !HAVE_FREEBSD_SENDFILE */ /* HPUX_SENDFILE */ Pike_fatal("HP/UX style sendfile(): EFAULT\n"); #endif /* HAVE_FREEBSD_SENDFILE */ break; case EBADF: case ENOTCONN: case EPIPE: case EIO: case EAGAIN: /* Bad fd's or socket has been closed at other end. */ break; } #ifdef HAVE_HPUX_SENDFILE /* HPUX_SENDFILE */ } else { sent = res; #endif /* HAVE_HPUX_SENDFILE */ } this->sent += sent; goto done; fallback: #endif /* HAVE_FREEBSD_SENDFILE || HAVE_HPUX_SENDFILE || HAVE_MACOSX_SENDFILE */ SF_DFPRINTF((stderr, "sendfile: Sending headers\n")); /* Send headers */ if (this->hd_cnt) { this->sent += send_iov(this->to_fd, this->hd_iov, this->hd_cnt); } SF_DFPRINTF((stderr, "sendfile: Sent %ld bytes so far.\n", (long)this->sent)); #if defined(HAVE_SENDFILE) && !defined(HAVE_FREEBSD_SENDFILE) && !defined(HAVE_HPUX_SENDFILE) && !defined(HAVE_MACOSX_SENDFILE) SF_DFPRINTF((stderr, "sendfile: Sending file with sendfile() Linux & Solaris.\n")); { int fail; off_t offset = this->offset; if (this->len < 0) { PIKE_STAT_T st; if (!fd_fstat(this->from_fd, &st) && S_ISREG(st.st_mode)) { this->len = st.st_size - offset; /* To end of file */ } else { this->len = MAX_LONGEST; } } while (this->len > 0) { do { fail = sendfile(this->to_fd, this->from_fd, &offset, this->len); } while ((fail < 0) && (errno == EINTR)); this->offset = offset; if (fail <= 0) { if (!fail) break; /* EOF */ /* Failed: Try normal... */ goto normal; } this->sent += fail; this->len -= fail; } goto send_trailers; } normal: #endif /* HAVE_SENDFILE && !HAVE_FREEBSD_SENDFILE && !HAVE_HPUX_SENDFILE && !HAVE_MACOSX_SENDFILE */ SF_DFPRINTF((stderr, "sendfile: Sending file by hand\n")); #if 0 /* mmap is slower than read/write on most if not all systems */ #if defined(HAVE_MMAP) && defined(HAVE_MUNMAP) { PIKE_STAT_T st; if (!fd_fstat(this->from_fd, &st) && S_ISREG(st.st_mode)) { /* Regular file, try using mmap(). */ SF_DFPRINTF((stderr, "sendfile: from is a regular file - trying mmap().\n")); while (this->len) { void *mem; ptrdiff_t len = st.st_size - this->offset; /* To end of file */ char *buf; int buflen; if ((len > this->len) && (this->len >= 0)) { len = this->len; } /* Try to limit memory space usage */ if (len > MMAP_SIZE) { len = MMAP_SIZE; } if (!len) { /* Done */ goto send_trailers; } mem = mmap(NULL, len, PROT_READ, MAP_FILE|MAP_SHARED, this->from_fd, this->offset); if (((long)mem) == ((long)MAP_FAILED)) { /* Try using read & write instead. */ goto use_read_write; } #if defined(HAVE_MADVISE) && defined(MADV_SEQUENTIAL) madvise(mem, len, MADV_SEQUENTIAL); #endif /* HAVE_MADVISE && MADV_SEQUENTIAL */ buf = mem; buflen = len; while (buflen) { int wrlen = fd_write(this->to_fd, buf, buflen); if ((wrlen < 0) && (errno == EINTR)) { continue; } else if (wrlen < 0) { munmap(mem, len); goto send_trailers; } buf += wrlen; buflen -= wrlen; this->sent += wrlen; this->offset += wrlen; if (this->len > 0) { this->len -= wrlen; } } munmap(mem, len); } /* Shouldn't there be a goto here ? /Hubbe */ /* True. Fixed. /grubba */ goto send_trailers; } } use_read_write: #endif /* HAVE_MMAP && HAVE_MUNMAP */ #endif SF_DFPRINTF((stderr, "sendfile: Using read() and write().\n")); while ((fd_lseek(this->from_fd, this->offset, SEEK_SET) < 0) && (errno == EINTR)) ; { ptrdiff_t buflen; ptrdiff_t len; if ((this->len > this->buf_size) || (this->len < 0)) { len = this->buf_size; } else len = (ptrdiff_t) this->len; while ((buflen = fd_read(this->from_fd, this->buffer, len)) > 0) { char *buf = this->buffer; this->len -= buflen; this->offset += buflen; while (buflen) { ptrdiff_t wrlen = fd_write(this->to_fd, buf, buflen); if ((wrlen < 0) && (errno == EINTR)) { continue; } else if (wrlen < 0) { goto send_trailers; } buf += wrlen; buflen -= wrlen; this->sent += wrlen; } if ((this->len > this->buf_size) || (this->len < 0)) { len = this->buf_size; } else len = (ptrdiff_t) this->len; } } send_trailers: SF_DFPRINTF((stderr, "sendfile: Sent %ld bytes so far.\n", (long)this->sent)); /* No more need for the buffer */ free(this->buffer); this->buffer = NULL; SF_DFPRINTF((stderr, "sendfile: Sending trailers.\n")); if (this->tr_cnt) { this->sent += send_iov(this->to_fd, this->tr_iov, this->tr_cnt); } } else { /* Only headers & trailers */ struct iovec *iov = this->hd_iov; int iovcnt = this->hd_cnt; SF_DFPRINTF((stderr, "sendfile: Only headers & trailers.\n")); if (!iovcnt) { /* Only trailers */ iovcnt = this->tr_cnt; iov = this->tr_iov; } else if (this->tr_cnt) { /* Both headers & trailers */ if (iov + this->hd_cnt != this->tr_iov) { /* They are not back-to-back. Fix! */ int i; struct iovec *iov_tmp = iov + this->hd_cnt; for (i=0; i < this->tr_cnt; i++) { iov_tmp[i] = this->tr_iov[i]; } } /* They are now back-to-back. */ iovcnt += this->tr_cnt; } /* All iovec's are now in iov & iovcnt */ this->sent += send_iov(this->to_fd, iov, iovcnt); } #if defined(HAVE_FREEBSD_SENDFILE) || defined(HAVE_HPUX_SENDFILE) || defined(HAVE_MACOSX_SENDFILE) done: #endif /* HAVE_FREEBSD_SENDFILE || HAVE_HPUX_SENDFILE || HAVE_MACOSX_SENDFILE */ #ifdef SOL_TCP #ifdef TCP_CORK /* Restore the cork mode for the socket. */ if (!old_val) { while((setsockopt(this->to_fd, SOL_TCP, TCP_CORK, &old_val, old_len)<0) && (errno == EINTR)) ; } #elif defined(TCP_NODELAY) /* Restore the nagle mode for the socket. */ if (old_val == 1) { while((setsockopt(this->to_fd, SOL_TCP, TCP_NODELAY, &old_val, old_len)<0) && (errno == EINTR)) ; } #endif /* TCP_CORK || TCP_NODELAY */ #endif /* SOL_TCP */ SF_DFPRINTF((stderr, "sendfile: Done. Setting up callback\n" "%d bytes sent\n", this->sent)); /* FIXME: Restore non-blocking mode here? */ } static void worker(void *this_) { struct pike_sendfile *this = this_; struct Backend_struct *backend; struct timeval tv; low_do_sendfile(this); low_mt_lock_interpreter(); /* Can run even if threads_disabled. */ /* * Unlock the fd's */ if (this->from) { if (this->from_file->prog) { this->from->flags &= ~FILE_LOCK_FD; } else { /* Destructed. */ if (this->from_fd >= 0) { fd_close(this->from_fd); } /* Paranoia */ change_fd_for_box (&this->from->box, -1); } } if (this->to_file->prog) { this->to->flags &= ~FILE_LOCK_FD; } else { /* Destructed */ fd_close(this->to_fd); /* Paranoia */ change_fd_for_box (&this->to->box, -1); } /* Neither of the following can be done in our current context * so we do them from a backend callback. * * Call the callback. * * Get rid of extra ref to the object, and free ourselves. */ #ifdef PIKE_DEBUG if (this->backend_callback) Pike_fatal ("Didn't expect a backend callback to be installed already.\n"); #endif if (!(backend = this->to->box.backend)) { backend = default_backend; } this->backend_callback = backend_add_backend_callback(backend, call_callback_and_free, this, 0); /* Call as soon as possible. */ tv.tv_usec = 0; tv.tv_sec = 0; backend_lower_timeout(backend, &tv); /* Wake up the backend */ backend_wake_up_backend(backend); /* We're gone... */ num_threads--; mt_unlock_interpreter(); /* Die */ return; } /* * Functions callable from Pike code */ /*! @decl void create(array(string) headers, object from, int offset, int len, @ *! array(string) trailers, object to, @ *! function callback, mixed ... args) *! *! Low-level implementation of @[Stdio.sendfile()]. *! *! Sends @[headers] followed by @[len] bytes starting at @[offset] *! from the file @[from] followed by @[trailers] to the file @[to]. *! When completed @[callback] will be called with the total number of *! bytes sent as the first argument, followed by @[args]. *! *! Any of @[headers], @[from] and @[trailers] may be left out *! by setting them to @expr{0@}. *! *! Setting @[offset] to @expr{-1@} means send from the current position in *! @[from]. *! *! Setting @[len] to @expr{-1@} means send until @[from]'s end of file is *! reached. *! *! @note *! Don't use this class directly! Use @[Stdio.sendfile()] instead. *! *! In Pike 7.7 and later the @[callback] function will be called *! from the backend associated with @[to]. *! *! @seealso *! @[Stdio.sendfile()] */ static void sf_create(INT32 args) { struct pike_sendfile sf; int iovcnt = 0; struct svalue *cb = NULL; LONGEST offset, len; if (THIS->to_file) { Pike_error("sendfile->create(): Called a second time!\n"); } /* In case the user has succeeded in initializing _callback * before create() is called. */ free_svalue(&(THIS->callback)); SET_SVAL(THIS->callback, T_INT, NUMBER_NUMBER, integer, 0); /* NOTE: The references to the stuff in sf are held by the stack. * This means that we can throw errors without needing to clean up. */ memset(&sf, 0, sizeof(struct pike_sendfile)); SET_SVAL(sf.callback, T_INT, NUMBER_NUMBER, integer, 0); get_all_args("sendfile", args, "%A%O%l%l%A%o%*", &(sf.headers), &(sf.from_file), &offset, &len, &(sf.trailers), &(sf.to_file), &cb); sf.offset = offset; sf.len = len; /* We need to give 'cb' another reference /Hubbe */ /* No, we don't. We steal the reference from the stack. * /grubba */ /* assign_svalue(&(sf.callback),cb); */ sf.callback = *cb; /* Fix the trailing args */ push_array(sf.args = aggregate_array(args-7)); args = 8; /* FIXME: Ought to fix fp so that the backtraces look right. */ /* Check that we're called with the right kind of objects. */ if (sf.to_file->prog == file_program) { sf.to = (struct my_file *)(sf.to_file->storage); } else if (!(sf.to = get_storage(sf.to_file, file_program))) { struct svalue *sval; if (!(sval = get_storage(sf.to_file, file_ref_program)) || (TYPEOF(*sval) != T_OBJECT) || !(sf.to = get_storage(sval->u.object, file_program))) { SIMPLE_BAD_ARG_ERROR("sendfile", 6, "object(Stdio.File)"); } add_ref(sval->u.object); #ifdef PIKE_DEBUG if ((TYPEOF(sp[5-args]) != T_OBJECT) || (sp[5-args].u.object != sf.to_file)) { Pike_fatal("sendfile: Stack out of sync(1).\n"); } #endif /* PIKE_DEBUG */ sf.to_file = sval->u.object; free_object(sp[5-args].u.object); sp[5-args].u.object = sf.to_file; } if ((sf.to->flags & FILE_LOCK_FD) || (sf.to->box.fd < 0)) { SIMPLE_BAD_ARG_ERROR("sendfile", 6, "object(Stdio.File)"); } sf.to_fd = sf.to->box.fd; if (sf.from_file && !sf.len) { /* No need for the from_file object. */ /* NOTE: We need to zap from_file from the stack too. */ free_object(sf.from_file); sf.from_file = NULL; sf.from = NULL; SET_SVAL(sp[1-args], T_INT, NUMBER_NUMBER, integer, 0); } if (sf.from_file) { if (sf.from_file->prog == file_program) { sf.from = (struct my_file *)(sf.from_file->storage); } else if (!(sf.from = get_storage(sf.from_file, file_program))) { struct svalue *sval; if (!(sval = get_storage(sf.from_file, file_ref_program)) || (TYPEOF(*sval) != T_OBJECT) || !(sf.from = get_storage(sval->u.object, file_program))) { SIMPLE_BAD_ARG_ERROR("sendfile", 2, "object(Stdio.File)"); } add_ref(sval->u.object); #ifdef PIKE_DEBUG if ((TYPEOF(sp[1-args]) != T_OBJECT) || (sp[1-args].u.object != sf.from_file)) { Pike_fatal("sendfile: Stack out of sync(2).\n"); } #endif /* PIKE_DEBUG */ sf.from_file = sval->u.object; free_object(sp[1-args].u.object); sp[1-args].u.object = sf.from_file; } if ((sf.from->flags & FILE_LOCK_FD) || (sf.from->box.fd < 0)) { SIMPLE_BAD_ARG_ERROR("sendfile", 2, "object(Stdio.File)"); } sf.from_fd = sf.from->box.fd; } /* Do some extra arg checking */ sf.hd_cnt = 0; if (sf.headers) { struct array *a = sf.headers; int i; for (i=0; i < a->size; i++) { if ((TYPEOF(a->item[i]) != T_STRING) || (a->item[i].u.string->size_shift)) { SIMPLE_BAD_ARG_ERROR("sendfile", 1, "array(string)"); } } iovcnt = a->size; sf.hd_cnt = a->size; } sf.tr_cnt = 0; if (sf.trailers) { struct array *a = sf.trailers; int i; for (i=0; i < a->size; i++) { if ((TYPEOF(a->item[i]) != T_STRING) || (a->item[i].u.string->size_shift)) { SIMPLE_BAD_ARG_ERROR("sendfile", 5, "array(string)"); } } iovcnt += a->size; sf.tr_cnt = a->size; } /* Set up the iovec's */ if (iovcnt) { #ifdef HAVE_HPUX_SENDFILE iovcnt = 2; #endif /* HAVE_HPUX_SENDFILE */ sf.iovs = xalloc(sizeof(struct iovec) * iovcnt); sf.hd_iov = sf.iovs; #ifdef HAVE_HPUX_SENDFILE sf.tr_iov = sf.iovs + 1; #else /* !HAVE_HPUX_SENDFILE */ sf.tr_iov = sf.iovs + sf.hd_cnt; #endif /* HAVE_HPUX_SENDFILE */ if (sf.headers) { int i; for (i = sf.hd_cnt; i--;) { struct pike_string *s; #ifdef HAVE_HPUX_SENDFILE ref_push_string(sf.headers->item[i].u.string); #else /* !HAVE_HPUX_SENDFILE */ if ((s = sf.headers->item[i].u.string)->len) { sf.hd_iov[i].iov_base = s->str; sf.hd_iov[i].iov_len = s->len; } else { sf.hd_iov++; sf.hd_cnt--; } #endif /* HAVE_HPUX_SENDFILE */ } #ifdef HAVE_HPUX_SENDFILE if (sf.hd_cnt) { f_add(sf.hd_cnt); sf.hd_cnt = 1; free_string(sf.headers->item->u.string); sf.headers->item->u.string = sp[-1].u.string; sp--; dmalloc_touch_svalue(sp); sf.hd_iov->iov_base = sf.headers->item->u.string->str; sf.hd_iov->iov_len = sf.headers->item->u.string->len; } else { sf.hd_iov->iov_base = NULL; sf.hd_iov->iov_len = 0; } #endif /* HAVE_HPUX_SENDFILE */ } if (sf.trailers) { int i; for (i = sf.tr_cnt; i--;) { struct pike_string *s; #ifdef HAVE_HPUX_SENDFILE ref_push_string(sf.trailers->item[i].u.string); #else /* !HAVE_HPUX_SENDFILE */ if ((s = sf.trailers->item[i].u.string)->len) { sf.tr_iov[i].iov_base = s->str; sf.tr_iov[i].iov_len = s->len; } else { sf.tr_iov++; sf.tr_cnt--; } #endif /* HAVE_HPUX_SENDFILE */ } #ifdef HAVE_HPUX_SENDFILE if (sf.tr_cnt) { f_add(sf.tr_cnt); free_string(sf.trailers->item->u.string); sf.trailers->item->u.string = sp[-1].u.string; sp--; dmalloc_touch_svalue(sp); sf.tr_iov->iov_base = sf.trailers->item->u.string->str; sf.tr_iov->iov_len = sf.trailers->item->u.string->len; } else { sf.tr_iov->iov_base = NULL; sf.tr_iov->iov_len = 0; } #endif /* HAVE_HPUX_SENDFILE */ } } /* We need to copy the arrays since the user might do destructive * operations on them, and we need the arrays to keep references to * the strings. */ if ((sf.headers) && (sf.headers->refs > 1)) { struct array *a = copy_array(sf.headers); #ifdef PIKE_DEBUG if ((TYPEOF(sp[-args]) != T_ARRAY) || (sp[-args].u.array != sf.headers)) { Pike_fatal("sendfile: Stack out of sync(3).\n"); } #endif /* PIKE_DEBUG */ free_array(sf.headers); sp[-args].u.array = a; sf.headers = a; } if ((sf.trailers) && (sf.trailers->refs > 1)) { struct array *a = copy_array(sf.trailers); #ifdef PIKE_DEBUG if ((TYPEOF(sp[4-args]) != T_ARRAY) || (sp[4-args].u.array != sf.trailers)) { Pike_fatal("sendfile: Stack out of sync(4).\n"); } #endif /* PIKE_DEBUG */ free_array(sf.trailers); sp[4-args].u.array = a; sf.trailers = a; } if (sf.from_file) { /* We may need a buffer to hold the data */ ONERROR tmp; SET_ONERROR(tmp, free, sf.iovs); sf.buffer = xalloc(BUF_SIZE); UNSET_ONERROR(tmp); sf.buf_size = BUF_SIZE; } { /* Threaded blocking mode possible */ /* Make sure both file objects are in blocking mode. */ if (sf.from_file) { /* set_blocking */ set_nonblocking(sf.from_fd, 0); sf.from->open_mode &= ~FILE_NONBLOCKING; /* Fix offset */ if (sf.offset < 0) { sf.offset = fd_lseek(sf.from_fd, 0, SEEK_CUR); if (sf.offset < 0) { sf.offset = 0; } } } /* set_blocking */ set_nonblocking(sf.to_fd, 0); sf.to->open_mode &= ~FILE_NONBLOCKING; /* * Setup done. Note that we keep refs to all refcounted svalues in * our object. */ sp -= args; *THIS = sf; DO_IF_DMALLOC(while(args--) dmalloc_touch_svalue(sp + args)); args = 0; /* FIXME: Ought to fix fp so that the backtraces look right. */ /* Note: we hold a reference to ourselves. * The gc() won't find it, so be carefull. */ add_ref(THIS->self = Pike_fp->current_object); /* * Make sure the user can't modify the fd's under us. */ sf.to->flags |= FILE_LOCK_FD; if (sf.from) { sf.from->flags |= FILE_LOCK_FD; } /* It is a good idea to increase num_threads before the thread * is actually created, otherwise the backend (or somebody) may * be hogging the interpreter lock... /Hubbe */ num_threads++; /* The worker will have a ref. */ th_farm(worker, THIS); #if 0 { /* Failure */ sf.to->flags &= ~FILE_LOCK_FD; if (sf.from) { sf.from->flags &= ~FILE_LOCK_FD; } free_object(THIS->self); resource_error("Stdio.sendfile", sp, 0, "threads", 1, "Failed to create thread.\n"); } #endif /* 0 */ } return; } /*! @endclass */ #endif /* _REENTRANT */ /* * Module init code */ void init_stdio_sendfile(void) { #ifdef _REENTRANT START_NEW_PROGRAM_ID (STDIO_SENDFILE); ADD_STORAGE(struct pike_sendfile); MAP_VARIABLE("_args", tArray, 0, OFFSETOF(pike_sendfile, args), T_ARRAY); MAP_VARIABLE("_callback", tFuncV(tInt,tMix,tVoid), 0, OFFSETOF(pike_sendfile, callback), T_MIXED); /* function(array(string),object,int,int,array(string),object,function(int,mixed...:void),mixed...:void) */ ADD_FUNCTION("create", sf_create, tFuncV(tArr(tStr) tObj tInt tInt tArr(tStr) tObj tFuncV(tInt, tMix, tVoid), tMix, tVoid), 0); set_init_callback(init_pike_sendfile); set_exit_callback(exit_pike_sendfile); pike_sendfile_prog = end_program(); add_program_constant("sendfile", pike_sendfile_prog, 0); #endif /* _REENTRANT */ } void exit_stdio_sendfile(void) { #ifdef _REENTRANT if (pike_sendfile_prog) { free_program(pike_sendfile_prog); pike_sendfile_prog = NULL; } #endif /* _REENTRANT */ } /*! @endmodule */

pike.git/ src/ modules/ _Stdio/ sendfile.c > fb254695ec4ce60e19dc8bdfa1683a13707be950 [Annotate]