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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#if (NGX_TEST_BUILD_SOLARIS_SENDFILEV)
/* Solaris declarations */
typedef struct sendfilevec {
int sfv_fd;
u_int sfv_flag;
off_t sfv_off;
size_t sfv_len;
} sendfilevec_t;
#define SFV_FD_SELF -2
static ssize_t sendfilev(int fd, const struct sendfilevec *vec,
int sfvcnt, size_t *xferred)
{
return -1;
}
ngx_chain_t *ngx_solaris_sendfilev_chain(ngx_connection_t *c, ngx_chain_t *in,
off_t limit);
#endif
#define NGX_SENDFILEVECS NGX_IOVS_PREALLOCATE
ngx_chain_t *
ngx_solaris_sendfilev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
{
int fd;
u_char *prev;
off_t size, send, prev_send, aligned, fprev;
size_t sent;
ssize_t n;
ngx_int_t eintr;
ngx_err_t err;
ngx_buf_t *file;
ngx_uint_t nsfv;
sendfilevec_t *sfv, sfvs[NGX_SENDFILEVECS];
ngx_event_t *wev;
ngx_chain_t *cl;
wev = c->write;
if (!wev->ready) {
return in;
}
if (!c->sendfile) {
return ngx_writev_chain(c, in, limit);
}
/* the maximum limit size is the maximum size_t value - the page size */
if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) {
limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
}
send = 0;
for ( ;; ) {
fd = SFV_FD_SELF;
prev = NULL;
fprev = 0;
file = NULL;
sfv = NULL;
eintr = 0;
sent = 0;
prev_send = send;
nsfv = 0;
/* create the sendfilevec and coalesce the neighbouring bufs */
for (cl = in; cl && send < limit; cl = cl->next) {
if (ngx_buf_special(cl->buf)) {
continue;
}
if (ngx_buf_in_memory_only(cl->buf)) {
fd = SFV_FD_SELF;
size = cl->buf->last - cl->buf->pos;
if (send + size > limit) {
size = limit - send;
}
if (prev == cl->buf->pos) {
sfv->sfv_len += (size_t) size;
} else {
if (nsfv == NGX_SENDFILEVECS) {
break;
}
sfv = &sfvs[nsfv++];
sfv->sfv_fd = SFV_FD_SELF;
sfv->sfv_flag = 0;
sfv->sfv_off = (off_t) (uintptr_t) cl->buf->pos;
sfv->sfv_len = (size_t) size;
}
prev = cl->buf->pos + (size_t) size;
send += size;
} else {
prev = NULL;
size = cl->buf->file_last - cl->buf->file_pos;
if (send + size > limit) {
size = limit - send;
aligned = (cl->buf->file_pos + size + ngx_pagesize - 1)
& ~((off_t) ngx_pagesize - 1);
if (aligned <= cl->buf->file_last) {
size = aligned - cl->buf->file_pos;
}
}
if (fd == cl->buf->file->fd && fprev == cl->buf->file_pos) {
sfv->sfv_len += (size_t) size;
} else {
if (nsfv == NGX_SENDFILEVECS) {
break;
}
sfv = &sfvs[nsfv++];
fd = cl->buf->file->fd;
sfv->sfv_fd = fd;
sfv->sfv_flag = 0;
sfv->sfv_off = cl->buf->file_pos;
sfv->sfv_len = (size_t) size;
}
file = cl->buf;
fprev = cl->buf->file_pos + size;
send += size;
}
}
n = sendfilev(c->fd, sfvs, nsfv, &sent);
if (n == -1) {
err = ngx_errno;
switch (err) {
case NGX_EAGAIN:
break;
case NGX_EINTR:
eintr = 1;
break;
default:
wev->error = 1;
ngx_connection_error(c, err, "sendfilev() failed");
return NGX_CHAIN_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err,
"sendfilev() sent only %uz bytes", sent);
} else if (n == 0 && sent == 0) {
/*
* sendfilev() is documented to return -1 with errno
* set to EINVAL if svf_len is greater than the file size,
* but at least Solaris 11 returns 0 instead
*/
if (file) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"sendfilev() reported that \"%s\" was truncated at %O",
file->file->name.data, file->file_pos);
} else {
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"sendfilev() returned 0 with memory buffers");
}
return NGX_CHAIN_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"sendfilev: %z %z", n, sent);
c->sent += sent;
in = ngx_chain_update_sent(in, sent);
if (eintr) {
send = prev_send + sent;
continue;
}
if (send - prev_send != (off_t) sent) {
wev->ready = 0;
return in;
}
if (send >= limit || in == NULL) {
return in;
}
}
}
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