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Diffstat (limited to 'source3/lib/sendfile.c')
-rw-r--r--source3/lib/sendfile.c203
1 files changed, 49 insertions, 154 deletions
diff --git a/source3/lib/sendfile.c b/source3/lib/sendfile.c
index c2099bc8b1..d5fd5a6ab5 100644
--- a/source3/lib/sendfile.c
+++ b/source3/lib/sendfile.c
@@ -33,7 +33,7 @@
#define MSG_MORE 0x8000
#endif
-ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, off_t offset, size_t count)
{
size_t total=0;
ssize_t ret;
@@ -58,11 +58,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
while (total) {
ssize_t nwritten;
do {
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_SENDFILE64)
- nwritten = sendfile64(tofd, fromfd, &offset, total);
-#else
nwritten = sendfile(tofd, fromfd, &offset, total);
-#endif
#if defined(EWOULDBLOCK)
} while (nwritten == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
@@ -93,93 +89,6 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
return count + hdr_len;
}
-#elif defined(LINUX_BROKEN_SENDFILE_API)
-
-/*
- * 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
-#endif
-
-ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
-{
- 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 layer catches this
- * and uses a normal read. JRA.
- */
-
- if ((sizeof(SMB_OFF_T) >= 8) && (offset + count > (SMB_OFF_T)0x7FFFFFFF)) {
- errno = ENOSYS;
- return -1;
- }
-
- /*
- * Send the header first.
- * Use MSG_MORE to cork the TCP output until sendfile is called.
- */
-
- if (header) {
- hdr_len = header->length;
- while (total < hdr_len) {
- ret = sys_send(tofd, header->data + total,hdr_len - total, MSG_MORE);
- if (ret == -1)
- return -1;
- total += ret;
- }
- }
-
- small_total = (uint32)count;
- small_offset = (int32)offset;
-
- while (small_total) {
- int32 nwritten;
- do {
- nwritten = sendfile(tofd, fromfd, &small_offset, small_total);
-#if defined(EWOULDBLOCK)
- } while (nwritten == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
-#else
- } while (nwritten == -1 && (errno == EINTR || errno == EAGAIN));
-#endif
- if (nwritten == -1) {
- if (errno == ENOSYS || errno == EINVAL) {
- /* 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) {
- /*
- * EOF, return a short read
- */
- return hdr_len + (((uint32)count) - small_total);
- }
- small_total -= nwritten;
- }
- return count + hdr_len;
-}
-
-
#elif defined(SOLARIS_SENDFILE_API)
/*
@@ -188,7 +97,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
#include <sys/sendfile.h>
-ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, off_t offset, size_t count)
{
int sfvcnt;
size_t total, xferred;
@@ -229,11 +138,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
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 defined(EWOULDBLOCK)
if (nwritten == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK)) {
#else
@@ -278,7 +183,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
#include <sys/socket.h>
#include <sys/uio.h>
-ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, off_t offset, size_t count)
{
size_t total=0;
struct iovec hdtrl[2];
@@ -307,11 +212,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
*/
do {
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_SENDFILE64)
- nwritten = sendfile64(tofd, fromfd, offset, total, &hdtrl[0], 0);
-#else
nwritten = sendfile(tofd, fromfd, offset, total, &hdtrl[0], 0);
-#endif
#if defined(EWOULDBLOCK)
} while (nwritten == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
@@ -347,80 +248,74 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
return count + hdr_len;
}
-#elif defined(FREEBSD_SENDFILE_API)
+#elif defined(FREEBSD_SENDFILE_API) || defined(DARWIN_SENDFILE_API)
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
-ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd,
+ const DATA_BLOB *header, off_t offset, size_t count)
{
- size_t total=0;
- struct sf_hdtr hdr;
- struct iovec hdtrl;
- size_t hdr_len = 0;
+ struct sf_hdtr sf_header = {0};
+ struct iovec io_header = {0};
- hdr.headers = &hdtrl;
- hdr.hdr_cnt = 1;
- hdr.trailers = NULL;
- hdr.trl_cnt = 0;
+ off_t nwritten;
+ int ret;
- /* Set up the header iovec. */
if (header) {
- hdtrl.iov_base = (void *)header->data;
- hdtrl.iov_len = hdr_len = header->length;
- } else {
- hdtrl.iov_base = NULL;
- hdtrl.iov_len = 0;
+ sf_header.headers = &io_header;
+ sf_header.hdr_cnt = 1;
+ io_header.iov_base = header->data;
+ io_header.iov_len = header->length;
+ sf_header.trailers = NULL;
+ sf_header.trl_cnt = 0;
}
- total = count;
- while (total + hdtrl.iov_len) {
- SMB_OFF_T nwritten;
- int ret;
-
- /*
- * FreeBSD sendfile returns 0 on success, -1 on error.
- * Remember, the tofd and fromfd are reversed..... :-).
- * nwritten includes the header data sent.
- */
+ while (count != 0) {
- do {
- ret = sendfile(fromfd, tofd, offset, total, &hdr, &nwritten, 0);
+ nwritten = count;
+#if defined(DARWIN_SENDFILE_API)
+ /* Darwin recycles nwritten as a value-result parameter, apart from that this
+ sendfile implementation is quite the same as the FreeBSD one */
+ ret = sendfile(fromfd, tofd, offset, &nwritten, &sf_header, 0);
+#else
+ ret = sendfile(fromfd, tofd, offset, count, &sf_header, &nwritten, 0);
+#endif
#if defined(EWOULDBLOCK)
- } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
+ if (ret == -1 && errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK) {
#else
- } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+ if (ret == -1 && errno != EINTR && errno != EAGAIN) {
#endif
- if (ret == -1)
+ /* Send failed, we are toast. */
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 hdtrl.iov_len bytes.
- * We change nwritten to be the number of file bytes written.
- */
+ if (nwritten == 0) {
+ /* EOF of offset is after EOF. */
+ break;
+ }
- if (hdtrl.iov_base && hdtrl.iov_len) {
- if (nwritten >= hdtrl.iov_len) {
- nwritten -= hdtrl.iov_len;
- hdtrl.iov_base = NULL;
- hdtrl.iov_len = 0;
+ if (sf_header.hdr_cnt) {
+ if (io_header.iov_len <= nwritten) {
+ /* Entire header was sent. */
+ sf_header.headers = NULL;
+ sf_header.hdr_cnt = 0;
+ nwritten -= io_header.iov_len;
} else {
- hdtrl.iov_base =
- (void *)((caddr_t)hdtrl.iov_base + nwritten);
- hdtrl.iov_len -= nwritten;
+ /* Partial header was sent. */
+ io_header.iov_len -= nwritten;
+ io_header.iov_base =
+ ((uint8_t *)io_header.iov_base) + nwritten;
nwritten = 0;
}
}
- total -= nwritten;
+
offset += nwritten;
+ count -= nwritten;
}
- return count + hdr_len;
+
+ return nwritten;
}
#elif defined(AIX_SENDFILE_API)
@@ -430,7 +325,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
/* 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)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, off_t offset, size_t count)
{
struct sf_parms hdtrl;
@@ -484,7 +379,7 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T of
#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)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, off_t offset, size_t count)
{
/* No sendfile syscall. */
errno = ENOSYS;
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-28 22:35:04 +0000