This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
{
size_t total=0;
ssize_t ret;
- ssize_t hdr_len = 0;
+ size_t hdr_len = 0;
/*
* Send the header first.
if (header) {
hdr_len = header->length;
- while (total < hd_len) {
+ while (total < hdr_len) {
ret = sys_send(tofd, header->data + total,hdr_len - total, MSG_MORE);
if (ret == -1)
return -1;
nwritten = sendfile(tofd, fromfd, &offset, total);
#endif
} while (nwritten == -1 && errno == EINTR);
- if (nwritten == -1)
+ if (nwritten == -1) {
+ if (errno == ENOSYS) {
+ /* Ok - we're in a world of pain here. We just sent
+ * the header, but the sendfile failed. We have to
+ * emulate the sendfile at an upper layer before we
+ * disable it's use. So we do something really ugly.
+ * We set the errno to a strange value so we can detect
+ * this at the upper level and take care of it without
+ * layer violation. JRA.
+ */
+ errno = EINTR; /* Normally we can never return this. */
+ }
return -1;
+ }
if (nwritten == 0)
return -1; /* I think we're at EOF here... */
total -= nwritten;
#elif defined(LINUX_BROKEN_SENDFILE_API)
-#include <sys/sendfile.h>
+/*
+ * We must use explicit 32 bit types here. This code path means Linux
+ * won't do proper 64-bit sendfile. JRA.
+ */
+
+extern int32 sendfile (int out_fd, int in_fd, int32 *offset, uint32 count);
+
#ifndef MSG_MORE
#define MSG_MORE 0x8000
size_t total=0;
ssize_t ret;
ssize_t hdr_len = 0;
+ uint32 small_total = 0;
+ int32 small_offset;
/*
* Fix for broken Linux 2.4 systems with no working sendfile64().
* If the offset+count > 2 GB then pretend we don't have the
- * system call sendfile at all. The upper later catches this
+ * system call sendfile at all. The upper layer catches this
* and uses a normal read. JRA.
*/
if (header) {
hdr_len = header->length;
- while (total < hd_len) {
+ while (total < hdr_len) {
ret = sys_send(tofd, header->data + total,hdr_len - total, MSG_MORE);
if (ret == -1)
return -1;
}
}
- total = count;
- while (total) {
- ssize_t nwritten;
+ small_total = (uint32)count;
+ small_offset = (int32)offset;
+
+ while (small_total) {
+ int32 nwritten;
do {
- nwritten = sendfile(tofd, fromfd, &offset, total);
+ nwritten = sendfile(tofd, fromfd, &small_offset, small_total);
} while (nwritten == -1 && errno == EINTR);
- if (nwritten == -1)
+ if (nwritten == -1) {
+ if (errno == ENOSYS) {
+ /* Ok - we're in a world of pain here. We just sent
+ * the header, but the sendfile failed. We have to
+ * emulate the sendfile at an upper layer before we
+ * disable it's use. So we do something really ugly.
+ * We set the errno to a strange value so we can detect
+ * this at the upper level and take care of it without
+ * layer violation. JRA.
+ */
+ errno = EINTR; /* Normally we can never return this. */
+ }
return -1;
+ }
if (nwritten == 0)
return -1; /* I think we're at EOF here... */
- total -= nwritten;
+ small_total -= nwritten;
}
return count + hdr_len;
}
#elif defined(SOLARIS_SENDFILE_API)
-/* Hmmm. Can't find Solaris sendfile API docs.... Where is it ? */
+/*
+ * Solaris sendfile code written by Pierre Belanger <belanger@pobox.com>.
+ */
+
+#include <sys/sendfile.h>
+
ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
{
- errno = ENOSYS;
- return -1;
+ int sfvcnt;
+ size_t total, xferred;
+ struct sendfilevec vec[2];
+ ssize_t hdr_len = 0;
+
+ if (header) {
+ sfvcnt = 2;
+
+ vec[0].sfv_fd = SFV_FD_SELF;
+ vec[0].sfv_flag = 0;
+ vec[0].sfv_off = (off_t)header->data;
+ vec[0].sfv_len = hdr_len = header->length;
+
+ vec[1].sfv_fd = fromfd;
+ vec[1].sfv_flag = 0;
+ vec[1].sfv_off = offset;
+ vec[1].sfv_len = count;
+
+ } else {
+ sfvcnt = 1;
+
+ vec[0].sfv_fd = fromfd;
+ vec[0].sfv_flag = 0;
+ vec[0].sfv_off = offset;
+ vec[0].sfv_len = count;
+ }
+
+ total = count + hdr_len;
+
+ while (total) {
+ ssize_t nwritten;
+
+ /*
+ * Although not listed in the API error returns, this is almost certainly
+ * a slow system call and will be interrupted by a signal with EINTR. JRA.
+ */
+
+ xferred = 0;
+
+#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_SENDFILEV64)
+ nwritten = sendfilev64(tofd, vec, sfvcnt, &xferred);
+#else
+ nwritten = sendfilev(tofd, vec, sfvcnt, &xferred);
+#endif
+ if (nwritten == -1 && errno == EINTR) {
+ if (xferred == 0)
+ continue; /* Nothing written yet. */
+ else
+ nwritten = xferred;
+ }
+
+ if (nwritten == -1)
+ return -1;
+ if (nwritten == 0)
+ return -1; /* I think we're at EOF here... */
+
+ /*
+ * If this was a short (signal interrupted) write we may need
+ * to subtract it from the header data, or null out the header
+ * data altogether if we wrote more than vec[0].sfv_len bytes.
+ * We move vec[1].* to vec[0].* and set sfvcnt to 1
+ */
+
+ if (sfvcnt == 2 && nwritten >= vec[0].sfv_len) {
+ vec[1].sfv_off += nwritten - vec[0].sfv_len;
+ vec[1].sfv_len -= nwritten - vec[0].sfv_len;
+
+ /* Move vec[1].* to vec[0].* and set sfvcnt to 1 */
+ vec[0] = vec[1];
+ sfvcnt = 1;
+ } else {
+ vec[0].sfv_off += nwritten;
+ vec[0].sfv_len -= nwritten;
+ }
+ total -= nwritten;
+ }
+ return count + hdr_len;
}
#elif defined(HPUX_SENDFILE_API)
hdtrl[0].iov_len = hdr_len = 0;
}
hdtrl[1].iov_base = NULL;
- hdtrl[1].iov_base = 0;
+ hdtrl[1].iov_len = 0;
total = count;
while (total + hdtrl[0].iov_len) {
hdtrl[0].iov_base = NULL;
hdtrl[0].iov_len = 0;
} else {
- nwritten = 0;
- hdtrl[0].iov_base += nwritten;
+ /* iov_base is defined as a void *... */
+ hdtrl[0].iov_base = ((char *)hdtrl[0].iov_base) + nwritten;
hdtrl[0].iov_len -= nwritten;
+ nwritten = 0;
}
}
total -= nwritten;
struct iovec hdtrl;
size_t hdr_len = 0;
- hdr->headers = &hdtrl;
- hdr->hdr_cnt = 1;
- hdr->trailers = NULL;
- hdr->trl_cnt = 0;
+ hdr.headers = &hdtrl;
+ hdr.hdr_cnt = 1;
+ hdr.trailers = NULL;
+ hdr.trl_cnt = 0;
/* Set up the header iovec. */
if (header) {
* We change nwritten to be the number of file bytes written.
*/
- if (hdtrl[0].iov_base && hdtrl.iov_len) {
+ if (hdtrl.iov_base && hdtrl.iov_len) {
if (nwritten >= hdtrl.iov_len) {
nwritten -= hdtrl.iov_len;
hdtrl.iov_base = NULL;
hdtrl.iov_len = 0;
} else {
- nwritten = 0;
hdtrl.iov_base += nwritten;
hdtrl.iov_len -= nwritten;
+ nwritten = 0;
}
}
total -= nwritten;
return count + hdr_len;
}
+#elif defined(AIX_SENDFILE_API)
+
+/* BEGIN AIX SEND_FILE */
+
+/* Contributed by William Jojo <jojowil@hvcc.edu> */
+#include <sys/socket.h>
+
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+{
+ struct sf_parms hdtrl;
+
+ /* Set up the header/trailer struct params. */
+ if (header) {
+ hdtrl.header_data = header->data;
+ hdtrl.header_length = header->length;
+ } else {
+ hdtrl.header_data = NULL;
+ hdtrl.header_length = 0;
+ }
+ hdtrl.trailer_data = NULL;
+ hdtrl.trailer_length = 0;
+
+ hdtrl.file_descriptor = fromfd;
+ hdtrl.file_offset = offset;
+ hdtrl.file_bytes = count;
+
+ while ( hdtrl.file_bytes + hdtrl.header_length ) {
+ ssize_t ret;
+
+ /*
+ Return Value
+
+ There are three possible return values from send_file:
+
+ Value Description
+
+ -1 an error has occurred, errno contains the error code.
+
+ 0 the command has completed successfully.
+
+ 1 the command was completed partially, some data has been
+ transmitted but the command has to return for some reason,
+ for example, the command was interrupted by signals.
+ */
+ do {
+ ret = send_file(&tofd, &hdtrl, 0);
+ } while ( (ret == 1) || (ret == -1 && errno == EINTR) );
+ if ( ret == -1 )
+ return -1;
+ }
+
+ return count + header->length;
+}
+/* END AIX SEND_FILE */
+
#else /* No sendfile implementation. Return error. */
ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
git.samba.org / samba.git / blobdiff