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workaround of 2G+ file bug in 64-bit Linux sendfile()

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This commit is contained in:
Igor Sysoev 2006-09-07 18:56:45 +00:00
parent 59cb782bfc
commit 8ce000a6b9
1 changed files with 10 additions and 4 deletions
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14
src/os/unix/ngx_linux_sendfile_chain.c
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@ -16,9 +16,15 @@
* parameter is int32_t, and use sendfile() for the file parts below 2G only,
* see src/os/unix/ngx_linux_config.h
*
* Linux 2.4.21 has a new sendfile64() syscall #239.
* Linux 2.4.21 has the new sendfile64() syscall #239.
*
* On Linux up to 2.6.16 sendfile() does not allow to pass the count parameter
* more than 2G-1 bytes even on 64-bit platforms: it returns EINVAL,
* so we limit it to 2G-1 bytes.
*/
#define NGX_SENDFILE_LIMIT 2147483647L
#if (IOV_MAX > 64)
#define NGX_HEADERS 64
@ -54,10 +60,10 @@ ngx_linux_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
}
/* the maximum limit size is the maximum size_t value - the page size */
/* the maximum limit size is 2G-1 - the page size */
if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) {
limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize;
if (limit == 0 || limit > NGX_SENDFILE_LIMIT - ngx_pagesize) {
limit = NGX_SENDFILE_LIMIT - ngx_pagesize;
}