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authorBjörn Jacke <bj@sernet.de>2012-06-29 20:16:18 +0200
committerBjoern Jacke <bj@sernet.de>2012-07-26 17:19:09 +0200
commit96340e60b7f7ff86a49cbb822ae9170812114dcd (patch)
treeccbc3232859e8a596f5fb64612b7b56670125dc7 /source3/lib
parent887cebffd06c1a9e8b3979c209cebf230de49d45 (diff)
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s3: add Darwin sendfile support and merge with the FreeBSD code
This is based on the adpotion of the FreeBSD sendfile code that was done by James Peach for Darwin. Autobuild-User(master): Björn Jacke <bj@sernet.de> Autobuild-Date(master): Thu Jul 26 17:19:09 CEST 2012 on sn-devel-104
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/sendfile.c94
1 files changed, 44 insertions, 50 deletions
diff --git a/source3/lib/sendfile.c b/source3/lib/sendfile.c
index 196ef6889b..d5fd5a6ab5 100644
--- a/source3/lib/sendfile.c
+++ b/source3/lib/sendfile.c
@@ -248,80 +248,74 @@ ssize_t sys_sendfile(int tofd, int fromfd, const DATA_BLOB *header, off_t offset
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, 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) {
- 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)