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#include "first.h"
#include "network_backends.h"
#if defined(USE_LINUX_SENDFILE)
#include "log.h"
#include <sys/sendfile.h>
#include <errno.h>
#include <string.h>
int network_write_file_chunk_sendfile(server *srv, connection *con, int fd, chunkqueue *cq, off_t *p_max_bytes) {
chunk* const c = cq->first;
ssize_t r;
off_t offset;
off_t toSend;
force_assert(NULL != c);
force_assert(FILE_CHUNK == c->type);
force_assert(c->offset >= 0 && c->offset <= c->file.length);
offset = c->file.start + c->offset;
toSend = c->file.length - c->offset;
if (toSend > *p_max_bytes) toSend = *p_max_bytes;
if (0 == toSend) {
chunkqueue_remove_finished_chunks(cq);
return 0;
}
if (0 != chunkqueue_open_file_chunk(srv, cq)) return -1;
if (-1 == (r = sendfile(fd, c->file.fd, &offset, toSend))) {
switch (errno) {
case EAGAIN:
case EINTR:
break;
case EPIPE:
case ECONNRESET:
return -2;
case EINVAL:
case ENOSYS:
#if defined(ENOTSUP) \
&& (!defined(EOPNOTSUPP) || EOPNOTSUPP != ENOTSUP)
case ENOTSUP:
#endif
#ifdef EOPNOTSUPP
case EOPNOTSUPP:
#endif
#ifdef ESOCKTNOSUPPORT
case ESOCKTNOSUPPORT:
#endif
#ifdef EAFNOSUPPORT
case EAFNOSUPPORT:
#endif
#ifdef USE_MMAP
return network_write_file_chunk_mmap(srv, con, fd, cq, p_max_bytes);
#else
return network_write_file_chunk_no_mmap(srv, con, fd, cq, p_max_bytes);
#endif
default:
log_error_write(srv, __FILE__, __LINE__, "ssd",
"sendfile failed:", strerror(errno), fd);
return -1;
}
}
if (r >= 0) {
chunkqueue_mark_written(cq, r);
*p_max_bytes -= r;
}
return (r > 0 && r == toSend) ? 0 : -3;
}
#endif /* USE_LINUX_SENDFILE */