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authorJeremy Allison <jra@samba.org>2002-09-12 18:18:35 +0000
committerJeremy Allison <jra@samba.org>2002-09-12 18:18:35 +0000
commit6cf499ecff96880acef4e53817dccd7d838edd62 (patch)
tree019bde301a6624fbd7b7fde7fd610502a31657e4 /source3/lib/sendfile.c
parentf6fdad1315ad4fcd046b3132a7c0b60a31d5a605 (diff)
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Fixed up FreeBSD sendfile code - only Solaris left then I can add the
configure tests... Jeremy. (This used to be commit 9dad88e1d4d09f61da87dab2633c6e989a9dd77f)
Diffstat (limited to 'source3/lib/sendfile.c')
-rw-r--r--source3/lib/sendfile.c77
1 files changed, 55 insertions, 22 deletions
diff --git a/source3/lib/sendfile.c b/source3/lib/sendfile.c
index 23d1154718..6e093c31ff 100644
--- a/source3/lib/sendfile.c
+++ b/source3/lib/sendfile.c
@@ -34,7 +34,7 @@
#define MSG_MORE 0x8000
#endif
-ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+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;
@@ -48,7 +48,7 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
if (header) {
hdr_len = header->length;
while (total < hd_len) {
- ret = sys_send(outfd, header->data + total,hdr_len - total, MSG_MORE);
+ ret = sys_send(tofd, header->data + total,hdr_len - total, MSG_MORE);
if (ret == -1)
return -1;
total += ret;
@@ -60,9 +60,9 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
ssize_t nwritten;
do {
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(SENDFILE64)
- nwritten = sendfile64(outfd, infd, &offset, total);
+ nwritten = sendfile64(tofd, fromfd, &offset, total);
#else
- nwritten = sendfile(outfd, infd, &offset, total);
+ nwritten = sendfile(tofd, fromfd, &offset, total);
#endif
} while (nwritten == -1 && errno == EINTR);
if (nwritten == -1)
@@ -76,7 +76,7 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
#elif defined(SOLARIS_SENDFILE_API)
-ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
{
}
@@ -85,7 +85,7 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
#include <sys/socket.h>
#include <sys/uio.h>
-ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
{
size_t total=0;
struct iovec hdtrl[2];
@@ -115,9 +115,9 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
do {
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(SENDFILE64)
- nwritten = sendfile64(outfd, infd, offset, total, &hdtrl[0], 0);
+ nwritten = sendfile64(tofd, fromfd, offset, total, &hdtrl[0], 0);
#else
- nwritten = sendfile(outfd, infd, offset, total, &hdtrl[0], 0);
+ nwritten = sendfile(tofd, fromfd, offset, total, &hdtrl[0], 0);
#endif
} while (nwritten == -1 && errno == EINTR);
if (nwritten == -1)
@@ -155,11 +155,12 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
#include <sys/socket.h>
#include <sys/uio.h>
-ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
{
size_t total=0;
struct sf_hdtr hdr;
struct iovec hdtrl;
+ size_t hdr_len = 0;
hdr->headers = &hdtrl;
hdr->hdr_cnt = 1;
@@ -167,29 +168,61 @@ ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T off
hdr->trl_cnt = 0;
/* Set up the header iovec. */
- hdtrl.iov_base = header->data;
- hdtrl.iov_len = header->length;
+ if (header) {
+ hdtrl.iov_base = header->data;
+ hdtrl.iov_len = hdr_len = header->length;
+ } else {
+ hdtrl.iov_base = NULL;
+ hdtrl.iov_len = 0;
+ }
total = count;
- while (total) {
- ssize_t nwritten;
+ 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.
+ */
+
do {
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(SENDFILE64)
- nwritten = sendfile64(outfd, infd, &offset, total, &hdr, NULL, 0);
-#else
- nwritten = sendfile(outfd, infd, &offset, total, &hdr, NULL, 0);
-#endif
- } while (nwritten == -1 && errno == EINTR);
- if (nwritten == -1)
+ ret = sendfile(fromfd, tofd, offset, total, &hdr, &nwritten, 0);
+ } while (ret == -1 && errno == EINTR);
+ if (ret == -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 hdtrl.iov_len bytes.
+ * We change nwritten to be the number of file bytes written.
+ */
+
+ if (hdtrl[0].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;
+ }
+ }
total -= nwritten;
+ offset += nwritten;
}
- return count + header->length;
+ return count + hdr_len;
}
#else /* No sendfile implementation. Return error. */
-ssize_t sys_sendfile(int outfd, int infd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
+ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count)
{
/* No sendfile syscall. */
errno = ENOSYS;