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lighttpd 1.4.41

    1: #include "first.h"
    2: 
    3: #include "network_backends.h"
    4: 
    5: #if defined(USE_LINUX_SENDFILE)
    6: 
    7: #include "network.h"
    8: #include "log.h"
    9: 
   10: #include <sys/sendfile.h>
   11: 
   12: #include <errno.h>
   13: #include <string.h>
   14: 
   15: int network_write_file_chunk_sendfile(server *srv, connection *con, int fd, chunkqueue *cq, off_t *p_max_bytes) {
   16: 	chunk* const c = cq->first;
   17: 	ssize_t r;
   18: 	off_t offset;
   19: 	off_t toSend;
   20: 
   21: 	force_assert(NULL != c);
   22: 	force_assert(FILE_CHUNK == c->type);
   23: 	force_assert(c->offset >= 0 && c->offset <= c->file.length);
   24: 
   25: 	offset = c->file.start + c->offset;
   26: 	toSend = c->file.length - c->offset;
   27: 	if (toSend > *p_max_bytes) toSend = *p_max_bytes;
   28: 
   29: 	if (0 == toSend) {
   30: 		chunkqueue_remove_finished_chunks(cq);
   31: 		return 0;
   32: 	}
   33: 
   34: 	if (0 != network_open_file_chunk(srv, con, cq)) return -1;
   35: 
   36: 	if (-1 == (r = sendfile(fd, c->file.fd, &offset, toSend))) {
   37: 		switch (errno) {
   38: 		case EAGAIN:
   39: 		case EINTR:
   40: 			break;
   41: 		case EPIPE:
   42: 		case ECONNRESET:
   43: 			return -2;
   44: 		case EINVAL:
   45: 		case ENOSYS:
   46: 	      #if defined(ENOTSUP) \
   47: 		&& (!defined(EOPNOTSUPP) || EOPNOTSUPP != ENOTSUP)
   48: 		case ENOTSUP:
   49: 	      #endif
   50: 	      #ifdef EOPNOTSUPP
   51: 		case EOPNOTSUPP:
   52: 	      #endif
   53: 	      #ifdef ESOCKTNOSUPPORT
   54: 		case ESOCKTNOSUPPORT:
   55: 	      #endif
   56: 	      #ifdef EAFNOSUPPORT
   57: 		case EAFNOSUPPORT:
   58: 	      #endif
   59: 		      #ifdef USE_MMAP
   60: 			return network_write_file_chunk_mmap(srv, con, fd, cq, p_max_bytes);
   61: 		      #else
   62: 			return network_write_file_chunk_no_mmap(srv, con, fd, cq, p_max_bytes);
   63: 		      #endif
   64: 		default:
   65: 			log_error_write(srv, __FILE__, __LINE__, "ssd",
   66: 					"sendfile failed:", strerror(errno), fd);
   67: 			return -1;
   68: 		}
   69: 	}
   70: 
   71: 	if (r >= 0) {
   72: 		chunkqueue_mark_written(cq, r);
   73: 		*p_max_bytes -= r;
   74: 	}
   75: 
   76: 	return (r > 0 && r == toSend) ? 0 : -3;
   77: }
   78: 
   79: #endif /* USE_LINUX_SENDFILE */