diff options
Diffstat (limited to 'nscd/grpcache.c')
| -rw-r--r-- | nscd/grpcache.c | 80 |
1 files changed, 55 insertions, 25 deletions
diff --git a/nscd/grpcache.c b/nscd/grpcache.c index c565f5a682..c207492cc0 100644 --- a/nscd/grpcache.c +++ b/nscd/grpcache.c @@ -1,22 +1,20 @@ /* Cache handling for group lookup. - Copyright (C) 1998-2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 1998-2005, 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License version 2 as + published by the Free Software Foundation. - The GNU C Library is distributed in the hope that it will be useful, + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <alloca.h> #include <assert.h> @@ -32,10 +30,14 @@ #include <string.h> #include <unistd.h> #include <sys/mman.h> +#include <sys/socket.h> #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. */ static const gr_response_header disabled = @@ -107,7 +109,8 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, case. */ total = sizeof (notfound); - written = TEMP_FAILURE_RETRY (write (fd, ¬found, total)); + written = TEMP_FAILURE_RETRY (send (fd, ¬found, total, + MSG_NOSIGNAL)); dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len); /* If we cannot permanently store the result, so be it. */ @@ -167,7 +170,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, char *gr_name; char *cp; const size_t key_len = strlen (key); - const size_t buf_len = 3 + sizeof (grp->gr_gid) + key_len + 1; + const size_t buf_len = 3 * sizeof (grp->gr_gid) + key_len + 1; char *buf = alloca (buf_len); ssize_t n; size_t cnt; @@ -276,6 +279,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, /* Adjust pointers into the memory block. */ gr_name = (char *) newp + (gr_name - (char *) dataset); cp = (char *) newp + (cp - (char *) dataset); + key_copy = (char *) newp + (key_copy - (char *) dataset); dataset = memcpy (newp, dataset, total + n); alloca_used = false; @@ -292,7 +296,30 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, unnecessarily let the receiver wait. */ assert (fd != -1); - written = TEMP_FAILURE_RETRY (write (fd, &dataset->resp, total)); +#ifdef HAVE_SENDFILE + if (__builtin_expect (db->mmap_used, 1) && !alloca_used) + { + 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)); + written = sendfileall (fd, db->wr_fd, + (char *) &dataset->resp + - (char *) db->head, 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 @@ -316,10 +343,10 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, marked with FIRST first. Otherwise we end up with dangling "pointers" in case a latter hash entry cannot be added. */ - bool first = req->type == GETGRBYNAME; + bool first = true; /* If the request was by GID, add that entry first. */ - if (req->type != GETGRBYNAME) + if (req->type == GETGRBYGID) { if (cache_add (GETGRBYGID, cp, key_offset, &dataset->head, true, db, owner) < 0) @@ -329,12 +356,14 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, dataset->head.usable = false; goto out; } + + first = false; } /* If the key is different from the name add a separate entry. */ else if (strcmp (key_copy, gr_name) != 0) { if (cache_add (GETGRBYNAME, key_copy, key_len + 1, - &dataset->head, first, db, owner) < 0) + &dataset->head, true, db, owner) < 0) { /* Could not allocate memory. Make sure the data gets discarded. */ @@ -346,11 +375,13 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, } /* We have to add the value for both, byname and byuid. */ - if (__builtin_expect (cache_add (GETGRBYNAME, gr_name, gr_name_len, - &dataset->head, first, db, owner) - == 0, 1)) + if ((req->type == GETGRBYNAME || db->propagate) + && __builtin_expect (cache_add (GETGRBYNAME, gr_name, + gr_name_len, + &dataset->head, first, db, owner) + == 0, 1)) { - if (req->type == GETGRBYNAME) + if (req->type == GETGRBYNAME && db->propagate) (void) cache_add (GETGRBYGID, cp, key_offset, &dataset->head, req->type != GETGRBYNAME, db, owner); } @@ -429,11 +460,10 @@ addgrbyX (struct database_dyn *db, int fd, request_header *req, { char *old_buffer = buffer; errno = 0; -#define INCR 1024 if (__builtin_expect (buflen > 32768, 0)) { - buflen += INCR; + buflen *= 2; buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen); if (buffer == NULL) { @@ -454,7 +484,7 @@ addgrbyX (struct database_dyn *db, int fd, request_header *req, else /* Allocate a new buffer on the stack. If possible combine it with the previously allocated buffer. */ - buffer = (char *) extend_alloca (buffer, buflen, buflen + INCR); + buffer = (char *) extend_alloca (buffer, buflen, 2 * buflen); } #if 0 |