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-rw-r--r--erts/emulator/drivers/common/efile_drv.c202
-rw-r--r--erts/emulator/drivers/common/erl_efile.h17
-rw-r--r--erts/emulator/drivers/common/inet_drv.c67
-rw-r--r--erts/emulator/drivers/unix/unix_efile.c77
4 files changed, 350 insertions, 13 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c
index 901d98c09d..5c52b99348 100644
--- a/erts/emulator/drivers/common/efile_drv.c
+++ b/erts/emulator/drivers/common/efile_drv.c
@@ -55,6 +55,7 @@
#define FILE_READ_LINE 29
#define FILE_FDATASYNC 30
#define FILE_FADVISE 31
+#define FILE_SENDFILE 32
/* Return codes */
@@ -98,7 +99,13 @@
# include "config.h"
#endif
#include <stdlib.h>
+
+// Need (NON)BLOCKING macros for sendfile
+#ifndef WANT_NONBLOCKING
+#define WANT_NONBLOCKING
+#endif
#include "sys.h"
+
#include "erl_driver.h"
#include "erl_efile.h"
#include "erl_threads.h"
@@ -225,9 +232,16 @@ static void file_outputv(ErlDrvData, ErlIOVec*);
static void file_async_ready(ErlDrvData, ErlDrvThreadData);
static void file_flush(ErlDrvData);
+#ifdef HAVE_SENDFILE
+static void file_ready_output(ErlDrvData data, ErlDrvEvent event);
+static void file_stop_select(ErlDrvEvent event, void* _);
+#endif /* HAVE_SENDFILE */
enum e_timer {timer_idle, timer_again, timer_write};
+#ifdef HAVE_SENDFILE
+enum e_sendfile {sending, not_sending};
+#endif /* HAVE_SENDFILE */
struct t_data;
@@ -242,6 +256,9 @@ typedef struct {
struct t_data *cq_head; /* Queue of incoming commands */
struct t_data *cq_tail; /* -""- */
enum e_timer timer_state;
+#ifdef HAVE_SENDFILE
+ enum e_sendfile sendfile_state;
+#endif /* HAVE_SENDFILE */
size_t read_bufsize;
ErlDrvBinary *read_binp;
size_t read_offset;
@@ -264,7 +281,11 @@ struct erl_drv_entry efile_driver_entry = {
file_stop,
file_output,
NULL,
+#ifdef HAVE_SENDFILE
+ file_ready_output,
+#else
NULL,
+#endif /* HAVE_SENDFILE */
"efile",
NULL,
NULL,
@@ -279,7 +300,13 @@ struct erl_drv_entry efile_driver_entry = {
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
ERL_DRV_FLAG_USE_PORT_LOCKING,
+ NULL,
+ NULL,
+#ifdef HAVE_SENDFILE
+ file_stop_select
+#else
NULL
+#endif /* HAVE_SENDFILE */
};
@@ -398,6 +425,14 @@ struct t_data
Sint64 length;
int advise;
} fadvise;
+#ifdef HAVE_SENDFILE
+ struct {
+ int out_fd;
+ off_t offset;
+ Uint64 nbytes;
+ Uint64 written;
+ } sendfile;
+#endif /* HAVE_SENDFILE */
} c;
char b[1];
};
@@ -485,7 +520,6 @@ static void *ef_safe_realloc(void *op, Uint s)
: 0)
-
#if 0
static void ev_clear(ErlIOVec *ev) {
@@ -613,7 +647,6 @@ static struct t_data *cq_deq(file_descriptor *desc) {
}
-
/*********************************************************************
* Driver entry point -> init
*/
@@ -628,6 +661,7 @@ file_init(void)
? atoi(buf)
: 0);
driver_system_info(&sys_info, sizeof(ErlDrvSysInfo));
+
return 0;
}
@@ -655,6 +689,9 @@ file_start(ErlDrvPort port, char* command)
desc->cq_head = NULL;
desc->cq_tail = NULL;
desc->timer_state = timer_idle;
+#ifdef HAVE_SENDFILE
+ desc->sendfile_state = not_sending;
+#endif
desc->read_bufsize = 0;
desc->read_binp = NULL;
desc->read_offset = 0;
@@ -893,8 +930,6 @@ static int reply_eof(file_descriptor *desc) {
driver_output2(desc->port, &c, 1, NULL, 0);
return 0;
}
-
-
static void invoke_name(void *data, int (*f)(Efile_error *, char *))
{
@@ -1694,6 +1729,66 @@ static void invoke_fadvise(void *data)
d->result_ok = efile_fadvise(&d->errInfo, fd, offset, length, advise);
}
+#ifdef HAVE_SENDFILE
+static void invoke_sendfile(void *data)
+{
+ struct t_data *d = (struct t_data *)data;
+ int fd = d->fd;
+ int out_fd = (int)d->c.sendfile.out_fd;
+ Uint64 nbytes = d->c.sendfile.nbytes;
+ int result = 0;
+ d->again = 0;
+
+ result = efile_sendfile(&d->errInfo, fd, out_fd, &d->c.sendfile.offset, &nbytes, NULL);
+
+ d->c.sendfile.written += nbytes;
+
+ if (result == 1) {
+ if (sys_info.async_threads != 0) {
+ d->result_ok = 0;
+ } else if (d->c.sendfile.nbytes == 0 && nbytes != 0) {
+ d->result_ok = 1;
+ } else if ((d->c.sendfile.nbytes - nbytes) != 0) {
+ d->result_ok = 1;
+ d->c.sendfile.nbytes -= nbytes;
+ } else {
+ d->result_ok = 0;
+ }
+ } else if (result == 0 && (d->errInfo.posix_errno == EAGAIN
+ || d->errInfo.posix_errno == EINTR)) {
+ d->result_ok = 1;
+ } else {
+ d->result_ok = -1;
+ }
+}
+
+static void free_sendfile(void *data) {
+ EF_FREE(data);
+}
+
+static void file_ready_output(ErlDrvData data, ErlDrvEvent event)
+{
+ file_descriptor* fd = (file_descriptor*) data;
+
+ switch (fd->d->command) {
+ case FILE_SENDFILE:
+ driver_select(fd->port, event,
+ (int)ERL_DRV_WRITE,(int) 0);
+ invoke_sendfile((void *)fd->d);
+ file_async_ready(data, (ErlDrvThreadData)fd->d);
+ break;
+ default:
+ break;
+ }
+}
+
+static void file_stop_select(ErlDrvEvent event, void* _)
+{
+
+}
+#endif /* HAVE_SENDFILE */
+
+
static void free_readdir(void *data)
{
struct t_data *d = (struct t_data *) data;
@@ -1755,6 +1850,10 @@ static void cq_execute(file_descriptor *desc) {
register void *void_ptr; /* Soft cast variable */
if (desc->timer_state == timer_again)
return;
+#ifdef HAVE_SENDFILE
+ if (desc->sendfile_state == sending)
+ return;
+#endif
if (! (d = cq_deq(desc)))
return;
TRACE_F(("x%i", (int) d->command));
@@ -2105,6 +2204,37 @@ file_async_ready(ErlDrvData e, ErlDrvThreadData data)
}
free_preadv(data);
break;
+#ifdef HAVE_SENDFILE
+ case FILE_SENDFILE:
+ if (d->result_ok == -1) {
+ desc->sendfile_state = not_sending;
+ reply_error(desc, &d->errInfo);
+ if (sys_info.async_threads != 0) {
+ SET_NONBLOCKING(d->c.sendfile.out_fd);
+ free_sendfile(data);
+ } else {
+ driver_select(desc->port, (ErlDrvEvent)(long)d->c.sendfile.out_fd,
+ ERL_DRV_USE, 0);
+ free_sendfile(data);
+ }
+ } else if (d->result_ok == 0) {
+ desc->sendfile_state = not_sending;
+ reply_Sint64(desc, d->c.sendfile.written);
+ if (sys_info.async_threads != 0) {
+ SET_NONBLOCKING(d->c.sendfile.out_fd);
+ free_sendfile(data);
+ } else {
+ driver_select(desc->port, (ErlDrvEvent)(long)d->c.sendfile.out_fd, ERL_DRV_USE, 0);
+ free_sendfile(data);
+ }
+ } else if (d->result_ok == 1) { // If we are using select to send the rest of the data
+ desc->sendfile_state = sending;
+ desc->d = d;
+ driver_select(desc->port, (ErlDrvEvent)(long)d->c.sendfile.out_fd,
+ ERL_DRV_USE|ERL_DRV_WRITE, 1);
+ }
+ break;
+#endif
default:
abort();
}
@@ -3245,9 +3375,69 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) {
goto done;
} /* case FILE_OPT_DELAYED_WRITE: */
} ASSERT(0); goto done; /* case FILE_SETOPT: */
-
+
+ case FILE_SENDFILE: {
+
+#ifdef HAVE_SENDFILE
+ struct t_data *d;
+ Uint32 out_fd, offsetH, offsetL, hd_len, tl_len;
+ Uint64 nbytes;
+ char flags;
+
+ if (ev->size < 1 + 7 * sizeof(Uint32) + sizeof(char)
+ || !EV_GET_UINT32(ev, &out_fd, &p, &q)
+ || !EV_GET_CHAR(ev, &flags, &p, &q)
+ || !EV_GET_UINT32(ev, &offsetH, &p, &q)
+ || !EV_GET_UINT32(ev, &offsetL, &p, &q)
+ || !EV_GET_UINT64(ev, &nbytes, &p, &q)
+ || !EV_GET_UINT32(ev, &hd_len, &p, &q)
+ || !EV_GET_UINT32(ev, &tl_len, &p, &q)) {
+ /* Buffer has wrong length to contain all the needed values */
+ reply_posix_error(desc, EINVAL);
+ goto done;
+ }
+
+ if (hd_len != 0 || tl_len != 0 || flags != 0) {
+ // We do not allow header, trailers and/or flags right now
+ reply_posix_error(desc, EINVAL);
+ goto done;
+ }
+
+ d = EF_SAFE_ALLOC(sizeof(struct t_data));
+ d->fd = desc->fd;
+ d->command = command;
+ d->invoke = invoke_sendfile;
+ d->free = NULL;
+ d->level = 2;
+
+ d->c.sendfile.out_fd = (int) out_fd;
+ d->c.sendfile.written = 0;
+
+ #if SIZEOF_OFF_T == 4
+ if (offsetH != 0) {
+ reply_posix_error(desc, EINVAL);
+ goto done;
+ }
+ d->c.sendfile.offset = (off_t) offsetL;
+ #else
+ d->c.sendfile.offset = ((off_t) offsetH << 32) | offsetL;
+ #endif
+
+ d->c.sendfile.nbytes = nbytes;
+
+ if (sys_info.async_threads != 0) {
+ SET_BLOCKING(d->c.sendfile.out_fd);
+ }
+
+ cq_enq(desc, d);
+#else
+ reply_posix_error(desc, ENOTSUP);
+#endif
+ goto done;
+ } /* case FILE_SENDFILE: */
+
} /* switch(command) */
-
+
if (lseek_flush_read(desc, &err) < 0) {
reply_posix_error(desc, err);
goto done;
diff --git a/erts/emulator/drivers/common/erl_efile.h b/erts/emulator/drivers/common/erl_efile.h
index 3097ded3f1..349ab0e17b 100644
--- a/erts/emulator/drivers/common/erl_efile.h
+++ b/erts/emulator/drivers/common/erl_efile.h
@@ -118,6 +118,19 @@ typedef struct _Efile_info {
*/
} Efile_info;
+
+#ifdef HAVE_SENDFILE
+/*
+ * Described the structure of header/trailers for sendfile
+ */
+struct t_sendfile_hdtl {
+ SysIOVec *headers;
+ int hdr_cnt;
+ SysIOVec *trailers;
+ int trl_cnt;
+};
+#endif /* HAVE_SENDFILE */
+
/*
* Functions.
*/
@@ -162,3 +175,7 @@ int efile_symlink(Efile_error* errInfo, char* old, char* new);
int efile_may_openfile(Efile_error* errInfo, char *name);
int efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset, Sint64 length,
int advise);
+#ifdef HAVE_SENDFILE
+int efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd,
+ off_t *offset, Uint64 *nbytes, struct t_sendfile_hdtl *hdtl);
+#endif /* HAVE_SENDFILE */
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index db052523a8..7d952b0c71 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -445,6 +445,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
driver_select(port, e, mode | (on?ERL_DRV_USE:0), on)
#define sock_select(d, flags, onoff) do { \
+ ASSERT(!onoff || !(d)->is_ignored); \
(d)->event_mask = (onoff) ? \
((d)->event_mask | (flags)) : \
((d)->event_mask & ~(flags)); \
@@ -538,6 +539,8 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
#define INET_REQ_GETIFADDRS 25
#define INET_REQ_ACCEPT 26
#define INET_REQ_LISTEN 27
+#define INET_REQ_IGNOREFD 28
+
/* TCP requests */
/* #define TCP_REQ_ACCEPT 40 MOVED */
/* #define TCP_REQ_LISTEN 41 MERGED */
@@ -725,6 +728,11 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
/* Max interface name */
#define INET_IFNAMSIZ 16
+/* INET Ignore states */
+#define INET_IGNORE_NONE 0
+#define INET_IGNORE_READ 1
+#define INET_IGNORE_WRITE 1 << 1
+
/* Max length of Erlang Term Buffer (for outputting structured terms): */
#ifdef HAVE_SCTP
#define PACKET_ERL_DRV_TERM_DATA_LEN 512
@@ -864,6 +872,9 @@ typedef struct {
double send_avg; /* average packet size sent */
subs_list empty_out_q_subs; /* Empty out queue subscribers */
+ int is_ignored; /* if a fd is ignored by from the inet_drv,
+ this should be set to true when the fd is used
+ outside of inet_drv. */
} inet_descriptor;
@@ -7344,6 +7355,8 @@ static ErlDrvData inet_start(ErlDrvPort port, int size, int protocol)
sys_memzero((char *)&desc->remote,sizeof(desc->remote));
+ desc->is_ignored = 0;
+
return (ErlDrvData)desc;
}
@@ -7626,6 +7639,33 @@ static int inet_ctl(inet_descriptor* desc, int cmd, char* buf, int len,
return ctl_reply(INET_REP_OK, tbuf, 2, rbuf, rsize);
}
+ case INET_REQ_IGNOREFD: {
+ DEBUGF(("inet_ctl(%ld): IGNOREFD, IGNORED = %d\r\n",
+ (long)desc->port,(int)*buf));
+
+ /*
+ * FD can only be ignored for connected TCP connections for now,
+ * possible to add UDP and SCTP support if needed.
+ */
+ if (!IS_CONNECTED(desc))
+ return ctl_error(ENOTCONN, rbuf, rsize);
+
+ if (!desc->stype == SOCK_STREAM)
+ return ctl_error(EINVAL, rbuf, rsize);
+
+ if (*buf == 1 && !desc->is_ignored) {
+ desc->is_ignored = INET_IGNORE_READ;
+ sock_select(desc, (FD_READ|FD_WRITE|FD_CLOSE|ERL_DRV_USE_NO_CALLBACK), 0);
+ } else if (*buf == 0 && desc->is_ignored) {
+ int flags = (FD_READ|FD_CLOSE|((desc->is_ignored & INET_IGNORE_WRITE)?FD_WRITE:0));
+ desc->is_ignored = INET_IGNORE_NONE;
+ sock_select(desc, flags, 1);
+ } else
+ return ctl_error(EINVAL, rbuf, rsize);
+
+ return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize);
+ }
+
#ifndef VXWORKS
case INET_REQ_GETSERVBYNAME: { /* L1 Name-String L2 Proto-String */
@@ -8001,6 +8041,7 @@ static int tcp_inet_ctl(ErlDrvData e, unsigned int cmd, char* buf, int len,
char** rbuf, int rsize)
{
tcp_descriptor* desc = (tcp_descriptor*)e;
+
switch(cmd) {
case INET_REQ_OPEN: { /* open socket and return internal index */
int domain;
@@ -8266,13 +8307,14 @@ static int tcp_inet_ctl(ErlDrvData e, unsigned int cmd, char* buf, int len,
if (enq_async(INETP(desc), tbuf, TCP_REQ_RECV) < 0)
return ctl_error(EALREADY, rbuf, rsize);
- if (tcp_recv(desc, n) == 0) {
+ if (INETP(desc)->is_ignored || tcp_recv(desc, n) == 0) {
if (timeout == 0)
async_error_am(INETP(desc), am_timeout);
else {
if (timeout != INET_INFINITY)
- driver_set_timer(desc->inet.port, timeout);
- sock_select(INETP(desc),(FD_READ|FD_CLOSE),1);
+ driver_set_timer(desc->inet.port, timeout);
+ if (!INETP(desc)->is_ignored)
+ sock_select(INETP(desc),(FD_READ|FD_CLOSE),1);
}
}
return ctl_reply(INET_REP_OK, tbuf, 2, rbuf, rsize);
@@ -9012,6 +9054,7 @@ static int tcp_inet_input(tcp_descriptor* desc, HANDLE event)
#ifdef DEBUG
long port = (long) desc->inet.port; /* Used after driver_exit() */
#endif
+ ASSERT(!INETP(desc)->is_ignored);
DEBUGF(("tcp_inet_input(%ld) {s=%d\r\n", port, desc->inet.s));
if (desc->inet.state == INET_STATE_ACCEPTING) {
SOCKET s;
@@ -9273,7 +9316,11 @@ static int tcp_sendv(tcp_descriptor* desc, ErlIOVec* ev)
DEBUGF(("tcp_sendv(%ld): s=%d, about to send %d,%d bytes\r\n",
(long)desc->inet.port, desc->inet.s, h_len, len));
- if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
+
+ if (INETP(desc)->is_ignored) {
+ INETP(desc)->is_ignored |= INET_IGNORE_WRITE;
+ n = 0;
+ } else if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
n = 0;
} else if (IS_SOCKET_ERROR(sock_sendv(desc->inet.s, ev->iov,
vsize, &n, 0))) {
@@ -9301,7 +9348,8 @@ static int tcp_sendv(tcp_descriptor* desc, ErlIOVec* ev)
DEBUGF(("tcp_sendv(%ld): s=%d, Send failed, queuing\r\n",
(long)desc->inet.port, desc->inet.s));
driver_enqv(ix, ev, n);
- sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
+ if (!INETP(desc)->is_ignored)
+ sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
}
return 0;
}
@@ -9366,7 +9414,10 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, int len)
DEBUGF(("tcp_send(%ld): s=%d, about to send %d,%d bytes\r\n",
(long)desc->inet.port, desc->inet.s, h_len, len));
- if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
+ if (INETP(desc)->is_ignored) {
+ INETP(desc)->is_ignored |= INET_IGNORE_WRITE;
+ n = 0;
+ } else if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
sock_send(desc->inet.s, buf, 0, 0);
n = 0;
} else if (IS_SOCKET_ERROR(sock_sendv(desc->inet.s,iov,2,&n,0))) {
@@ -9397,7 +9448,8 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, int len)
n -= h_len;
driver_enq(ix, ptr+n, len-n);
}
- sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
+ if (!INETP(desc)->is_ignored)
+ sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
}
return 0;
}
@@ -9421,6 +9473,7 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event)
int ret = 0;
ErlDrvPort ix = desc->inet.port;
+ ASSERT(!INETP(desc)->is_ignored);
DEBUGF(("tcp_inet_output(%ld) {s=%d\r\n",
(long)desc->inet.port, desc->inet.s));
if (desc->inet.state == INET_STATE_CONNECTING) {
diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c
index 4b3934657c..72911641d3 100644
--- a/erts/emulator/drivers/unix/unix_efile.c
+++ b/erts/emulator/drivers/unix/unix_efile.c
@@ -33,6 +33,9 @@
#include <sys/types.h>
#include <sys/uio.h>
#endif
+#if defined(HAVE_SENDFILE) && (defined(__linux__) || (defined(__sun) && defined(__SVR4)))
+#include <sys/sendfile.h>
+#endif
#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__)
#define DARWIN 1
@@ -1464,3 +1467,77 @@ efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset,
return check_error(0, errInfo);
#endif
}
+
+#ifdef HAVE_SENDFILE
+#define SENDFILE_CHUNK_SIZE ((1 << 30) -1)
+
+/*
+ * sendfile: The implementation of the sendfile system call varies
+ * a lot on different *nix platforms so to make the api similar in all
+ * we have to emulate some things in linux and play with variables on
+ * bsd/darwin.
+ *
+ * It could be possible to implement header/trailer in sendfile, though
+ * you would have to emulate it in linux and on BSD/Darwin some complex
+ * calculations have to be made when using a non blocking socket to figure
+ * out how much of the header/file/trailer was sent in each command.
+ */
+
+int
+efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd,
+ off_t *offset, Uint64 *nbytes, struct t_sendfile_hdtl* hdtl)
+{
+ Uint64 written = 0;
+#if defined(__linux__) || (defined(__sun) && defined(__SVR4))
+ ssize_t retval;
+ do {
+ // check if *nbytes is 0 or greater than the largest size_t
+ if (*nbytes == 0 || *nbytes > SENDFILE_CHUNK_SIZE)
+ retval = sendfile(out_fd, in_fd, offset, SENDFILE_CHUNK_SIZE);
+ else
+ retval = sendfile(out_fd, in_fd, offset, *nbytes);
+ if (retval > 0) {
+ written += retval;
+ *nbytes -= retval;
+ }
+ } while (retval != -1 && retval == SENDFILE_CHUNK_SIZE);
+ *nbytes = written;
+ return check_error(retval == -1 ? -1 : 0, errInfo);
+#elif defined(DARWIN)
+ int retval;
+ off_t len;
+ do {
+ // check if *nbytes is 0 or greater than the largest off_t
+ if(*nbytes > SENDFILE_CHUNK_SIZE)
+ len = SENDFILE_CHUNK_SIZE;
+ else
+ len = *nbytes;
+ retval = sendfile(in_fd, out_fd, *offset, &len, NULL, 0);
+ if (retval != -1 || errno == EAGAIN || errno == EINTR) {
+ *offset += len;
+ *nbytes -= len;
+ written += len;
+ }
+ } while (len == SENDFILE_CHUNK_SIZE);
+ *nbytes = written;
+ return check_error(retval, errInfo);
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+ off_t len;
+ int retval;
+ do {
+ if (*nbytes > SENDFILE_CHUNK_SIZE)
+ retval = sendfile(in_fd, out_fd, *offset, SENDFILE_CHUNK_SIZE,
+ NULL, &len, 0);
+ else
+ retval = sendfile(in_fd, out_fd, *offset, *nbytes, NULL, &len, 0);
+ if (retval != -1 || errno == EAGAIN || errno == EINTR) {
+ *offset += len;
+ *nbytes -= len;
+ written += len;
+ }
+ } while(len == SENDFILE_CHUNK_SIZE);
+ *nbytes = written;
+ return check_error(retval, errInfo);
+#endif
+}
+#endif /* HAVE_SENDFILE */