diff options
Diffstat (limited to 'nscd/hstcache.c')
| -rw-r--r-- | nscd/hstcache.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/nscd/hstcache.c b/nscd/hstcache.c index 29bce99..29f14af 100644 --- a/nscd/hstcache.c +++ b/nscd/hstcache.c @@ -34,10 +34,16 @@ #include <arpa/inet.h> #include <arpa/nameser.h> #include <sys/mman.h> +#ifdef HAVE_SENDFILE +# include <sys/sendfile.h> +#endif #include <stackinfo.h> #include "nscd.h" #include "dbg_log.h" +#ifdef HAVE_SENDFILE +# include <kernel-features.h> +#endif /* This is the standard reply in case the service is disabled. */ @@ -328,7 +334,29 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, unnecessarily keep the receiver waiting. */ assert (fd != -1); - written = writeall (fd, &dataset->resp, total); +#ifdef HAVE_SENDFILE + if (__builtin_expect (db->mmap_used, 1)) + { + assert (db->wr_fd != -1); + assert ((char *) &dataset->resp > (char *) db->data); + assert ((char *) &dataset->resp - (char *) db->head + + total + <= (sizeof (struct database_pers_head) + + db->head->module * sizeof (ref_t) + + db->head->data_size)); + off_t off = (char *) &dataset->resp - (char *) db->head; + written = sendfile (fd, db->wr_fd, &off, total); +# ifndef __ASSUME_SENDFILE + if (written == -1 && errno == ENOSYS) + goto use_write; +# endif + } + else +# ifndef __ASSUME_SENDFILE + use_write: +# endif +#endif + written = writeall (fd, &dataset->resp, total); } /* Add the record to the database. But only if it has not been |