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#include "network_backends.h"
#ifdef USE_SOLARIS_SENDFILEV
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include "network.h"
#include "fdevent.h"
#include "log.h"
#include "stat_cache.h"
#ifndef UIO_MAXIOV
#define UIO_MAXIOV IOV_MAX
#endif
/**
* a very simple sendfilev() interface for solaris which can be optimised a lot more
* as solaris sendfilev() supports 'sending everythin in one syscall()'
*
* If you want such an interface and need the performance, just give me an account on
* a solaris box.
* - jan@kneschke.de
*/
int network_write_chunkqueue_solarissendfilev(server *srv, connection *con, int fd, chunkqueue *cq) {
chunk *c;
size_t chunks_written = 0;
for(c = cq->first; c; c = c->next, chunks_written++) {
int chunk_finished = 0;
switch(c->type) {
case MEM_CHUNK: {
char * offset;
size_t toSend;
ssize_t r;
size_t num_chunks, i;
struct iovec chunks[UIO_MAXIOV];
chunk *tc;
size_t num_bytes = 0;
/* we can't send more then SSIZE_MAX bytes in one chunk */
/* build writev list
*
* 1. limit: num_chunks < UIO_MAXIOV
* 2. limit: num_bytes < SSIZE_MAX
*/
for(num_chunks = 0, tc = c; tc && tc->type == MEM_CHUNK && num_chunks < UIO_MAXIOV; num_chunks++, tc = tc->next);
for(tc = c, i = 0; i < num_chunks; tc = tc->next, i++) {
if (tc->mem->used == 0) {
chunks[i].iov_base = tc->mem->ptr;
chunks[i].iov_len = 0;
} else {
offset = tc->mem->ptr + tc->offset;
toSend = tc->mem->used - 1 - tc->offset;
chunks[i].iov_base = offset;
/* protect the return value of writev() */
if (toSend > SSIZE_MAX ||
num_bytes + toSend > SSIZE_MAX) {
chunks[i].iov_len = SSIZE_MAX - num_bytes;
num_chunks = i + 1;
break;
} else {
chunks[i].iov_len = toSend;
}
num_bytes += toSend;
}
}
if ((r = writev(fd, chunks, num_chunks)) < 0) {
switch (errno) {
case EAGAIN:
case EINTR:
r = 0;
break;
case EPIPE:
case ECONNRESET:
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "ssd",
"writev failed:", strerror(errno), fd);
return -1;
}
}
/* check which chunks have been written */
cq->bytes_out += r;
for(i = 0, tc = c; i < num_chunks; i++, tc = tc->next) {
if (r >= (ssize_t)chunks[i].iov_len) {
/* written */
r -= chunks[i].iov_len;
tc->offset += chunks[i].iov_len;
if (chunk_finished) {
/* skip the chunks from further touches */
chunks_written++;
c = c->next;
} else {
/* chunks_written + c = c->next is done in the for()*/
chunk_finished++;
}
} else {
/* partially written */
tc->offset += r;
chunk_finished = 0;
break;
}
}
break;
}
case FILE_CHUNK: {
ssize_t r;
off_t offset;
size_t toSend, written;
sendfilevec_t fvec;
stat_cache_entry *sce = NULL;
int ifd;
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, c->file.name, &sce)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
strerror(errno), c->file.name);
return -1;
}
offset = c->file.start + c->offset;
toSend = c->file.length - c->offset;
if (offset > sce->st.st_size) {
log_error_write(srv, __FILE__, __LINE__, "sb", "file was shrinked:", c->file.name);
return -1;
}
if (-1 == (ifd = open(c->file.name->ptr, O_RDONLY))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "open failed: ", strerror(errno));
return -1;
}
fvec.sfv_fd = ifd;
fvec.sfv_flag = 0;
fvec.sfv_off = offset;
fvec.sfv_len = toSend;
/* Solaris sendfilev() */
if (-1 == (r = sendfilev(fd, &fvec, 1, &written))) {
if (errno != EAGAIN) {
log_error_write(srv, __FILE__, __LINE__, "ssd", "sendfile: ", strerror(errno), errno);
close(ifd);
return -1;
}
r = 0;
}
close(ifd);
c->offset += written;
cq->bytes_out += written;
if (c->offset == c->file.length) {
chunk_finished = 1;
}
break;
}
default:
log_error_write(srv, __FILE__, __LINE__, "ds", c, "type not known");
return -1;
}
if (!chunk_finished) {
/* not finished yet */
break;
}
}
return chunks_written;
}
#endif
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