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openSUSE:Evergreen:11.1
glibc
glibc-2.10-nscd-nomeminflight.diff
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File glibc-2.10-nscd-nomeminflight.diff of Package glibc
commit 20e498bdb0608ae6ca431cb49d66d2ed6f5304f5 Author: Ulrich Drepper <drepper@redhat.com> Date: Fri Feb 13 20:36:37 2009 +0000 [BZ #5381] 2009-02-13 Ulrich Drepper <drepper@redhat.com> [BZ #5381] * nscd/nscd.h: Remove definitions and declarations for mem_in_flight. Change mempool_alloc prototype. * nscd/mem.c (gc): Don't handle mem_in_flight. (mempool_alloc): Third parameter now only indicates whether this is the first call (to allocate data) or not. If it is, get db rdlock. Release it on error. Don't handle mem_in_flight. * nscd/aicache.c (addhstaiX): Mark he parameter as const. Adjust third parameter of mempool_alloc calls. Nothing to do here in case mempool_alloc fails. Avoid local variable shadowing parameter. No need to get db rdlock before calling cache_add. * nscd/cache.c (cache_add): Adjust call to mempool_alloc. There is no mem_in_flight array anymore. * nscd/connections.c: Remove definition and handling of mem_in_flight. * nscd/grpcache.c (cache_addgr): Adjust third parameter of mempool_alloc calls. Mark he parameter as const. Nothing to do here in case mempool_alloc fails. No need to get db rdlock before calling cache_add. * nscd/hstcache.c (cache_addhst): Likewise. * nscd/initgrcache.c (addinitgroupsX): Likewise. * nscd/servicescache.c (cache_addserv): Likewise. * nscd/pwdcache.c (cache_addpw): Likewise. Remove some debugging code. diff --git a/nscd/aicache.c b/nscd/aicache.c index 5ffab76..524c0a6 100644 --- a/nscd/aicache.c +++ b/nscd/aicache.c @@ -1,5 +1,5 @@ /* Cache handling for host lookup. - Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 2004-2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2004. @@ -60,7 +60,8 @@ static const ai_response_header notfound = static void addhstaiX (struct database_dyn *db, int fd, request_header *req, - void *key, uid_t uid, struct hashentry *he, struct datahead *dh) + void *key, uid_t uid, struct hashentry *const he, + struct datahead *dh) { /* Search for the entry matching the key. Please note that we don't look again in the table whether the dataset is now available. We @@ -172,13 +173,8 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, /* Now we can allocate the data structure. If the TTL of the entry is reported as zero do not cache the entry at all. */ if (ttl != 0 && he == NULL) - { - dataset = (struct dataset *) mempool_alloc (db, total - + req->key_len, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + + req->key_len, 1); if (dataset == NULL) { @@ -300,9 +296,9 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, } else { - struct hostent *he = NULL; + struct hostent *hstent = NULL; int herrno; - struct hostent he_mem; + struct hostent hstent_mem; void *addr; size_t addrlen; int addrfamily; @@ -326,8 +322,8 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, while (1) { rc = __gethostbyaddr2_r (addr, addrlen, addrfamily, - &he_mem, tmpbuf, tmpbuflen, - &he, &herrno, NULL); + &hstent_mem, tmpbuf, tmpbuflen, + &hstent, &herrno, NULL); if (rc != ERANGE || herrno != NETDB_INTERNAL) break; tmpbuf = extend_alloca (tmpbuf, tmpbuflen, @@ -336,8 +332,8 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, if (rc == 0) { - if (he != NULL) - canon = he->h_name; + if (hstent != NULL) + canon = hstent->h_name; else canon = key; } @@ -352,13 +348,8 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, /* Now we can allocate the data structure. If the TTL of the entry is reported as zero do not cache the entry at all. */ if (ttl != 0 && he == NULL) - { - dataset = (struct dataset *) mempool_alloc (db, total - + req->key_len, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + + req->key_len, 1); if (dataset == NULL) { @@ -436,7 +427,7 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, appropriate memory and copy it. */ struct dataset *newp = (struct dataset *) mempool_alloc (db, total + req->key_len, - IDX_result_data); + 1); if (__builtin_expect (newp != NULL, 1)) { /* Adjust pointer into the memory block. */ @@ -445,8 +436,6 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, dataset = memcpy (newp, dataset, total + req->key_len); alloca_used = false; } - else - ++db->head->addfailed; /* Mark the old record as obsolete. */ dh->usable = false; @@ -515,5 +504,5 @@ next_nip: dataset = NULL; } - else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, IDX_result_data)) != NULL) + else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1)) != NULL) { dataset->head.allocsize = sizeof (struct dataset) + req->key_len; @@ -535,8 +523,6 @@ next_nip: /* Copy the key data. */ key_copy = memcpy (dataset->strdata, key, req->key_len); } - else - ++db->head->addfailed; } out: @@ -554,9 +540,6 @@ next_nip: MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, uid, he == NULL); diff --git a/nscd/cache.c b/nscd/cache.c index cd6e6b4..ab842ef 100644 --- a/nscd/cache.c +++ b/nscd/cache.c @@ -1,4 +1,4 @@ -/* Copyright (c) 1998, 1999, 2003-2007, 2008 Free Software Foundation, Inc. +/* Copyright (c) 1998, 1999, 2003-2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -155,21 +155,15 @@ cache_add (int type, const void *key, size_t len, struct datahead *packet, unsigned long int hash = __nis_hash (key, len) % table->head->module; struct hashentry *newp; - newp = mempool_alloc (table, sizeof (struct hashentry), IDX_record_data); + newp = mempool_alloc (table, sizeof (struct hashentry), 0); /* If we cannot allocate memory, just do not do anything. */ if (newp == NULL) { - ++table->head->addfailed; - /* If necessary mark the entry as unusable so that lookups will not use it. */ if (first) packet->usable = false; - /* Mark the in-flight memory as unused. */ - for (enum in_flight idx = 0; idx < IDX_record_data; ++idx) - mem_in_flight.block[idx].dbidx = -1; - return -1; } @@ -234,10 +228,6 @@ cache_add (int type, const void *key, size_t len, struct datahead *packet, pthread_cond_signal (&table->prune_cond); } - /* Mark the in-flight memory as unused. */ - for (enum in_flight idx = 0; idx < IDX_last; ++idx) - mem_in_flight.block[idx].dbidx = -1; - return 0; } diff --git a/nscd/connections.c b/nscd/connections.c index 7e3a406..3d0727f 100644 --- a/nscd/connections.c +++ b/nscd/connections.c @@ -250,11 +250,6 @@ static int have_accept4; /* Number of times clients had to wait. */ unsigned long int client_queued; -/* Data structure for recording in-flight memory allocation. */ -__thread struct mem_in_flight mem_in_flight attribute_tls_model_ie; -/* Global list of the mem_in_flight variables of all the threads. */ -struct mem_in_flight *mem_in_flight_list; - ssize_t writeall (int fd, const void *buf, size_t len) @@ -1584,16 +1579,6 @@ nscd_run_worker (void *p) { char buf[256]; - /* Initialize the memory-in-flight list. */ - for (enum in_flight idx = 0; idx < IDX_last; ++idx) - mem_in_flight.block[idx].dbidx = -1; - /* And queue this threads structure. */ - do - mem_in_flight.next = mem_in_flight_list; - while (atomic_compare_and_exchange_bool_acq (&mem_in_flight_list, - &mem_in_flight, - mem_in_flight.next) != 0); - /* Initial locking. */ pthread_mutex_lock (&readylist_lock); diff --git a/nscd/grpcache.c b/nscd/grpcache.c index c49c0e1..184d538 100644 --- a/nscd/grpcache.c +++ b/nscd/grpcache.c @@ -1,5 +1,5 @@ /* Cache handling for group lookup. - Copyright (C) 1998-2005, 2006, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 1998-2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -74,7 +74,7 @@ static const gr_response_header notfound = static void cache_addgr (struct database_dyn *db, int fd, request_header *req, const void *key, struct group *grp, uid_t owner, - struct hashentry *he, struct datahead *dh, int errval) + struct hashentry *const he, struct datahead *dh, int errval) { ssize_t total; ssize_t written; @@ -114,5 +114,5 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, dh->usable = false; } - else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, IDX_result_data)) != NULL) + else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1)) != NULL) { dataset->head.allocsize = sizeof (struct dataset) + req->key_len; @@ -143,9 +143,6 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, + sizeof (struct dataset) + req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, &dataset->strdata, req->key_len, &dataset->head, true, db, owner, he == NULL); @@ -155,8 +152,6 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, if (dh != NULL) dh->usable = false; } - else - ++db->head->addfailed; } } else @@ -202,12 +197,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, dataset = NULL; if (he == NULL) - { - dataset = (struct dataset *) mempool_alloc (db, total + n, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + n, 1); if (dataset == NULL) { @@ -277,8 +267,7 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, /* We have to create a new record. Just allocate appropriate memory and copy it. */ struct dataset *newp - = (struct dataset *) mempool_alloc (db, total + n, - IDX_result_data); + = (struct dataset *) mempool_alloc (db, total + n, 1); if (newp != NULL) { /* Adjust pointers into the memory block. */ @@ -289,8 +278,6 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, dataset = memcpy (newp, dataset, total + n); alloca_used = false; } - else - ++db->head->addfailed; /* Mark the old record as obsolete. */ dh->usable = false; @@ -343,9 +330,6 @@ cache_addgr (struct database_dyn *db, int fd, request_header *req, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - /* NB: in the following code we always must add the entry marked with FIRST first. Otherwise we end up with dangling "pointers" in case a latter hash entry cannot be diff --git a/nscd/hstcache.c b/nscd/hstcache.c index 4333917..51e2273 100644 --- a/nscd/hstcache.c +++ b/nscd/hstcache.c @@ -1,5 +1,5 @@ /* Cache handling for host lookup. - Copyright (C) 1998-2005, 2006, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 1998-2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -80,7 +80,7 @@ static const hst_response_header notfound = static void cache_addhst (struct database_dyn *db, int fd, request_header *req, const void *key, struct hostent *hst, uid_t owner, - struct hashentry *he, struct datahead *dh, int errval, + struct hashentry *const he, struct datahead *dh, int errval, int32_t ttl) { bool all_written = true; @@ -120,5 +120,5 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, dh->usable = false; } - else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, IDX_result_data)) != NULL) + else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1)) != NULL) { dataset->head.allocsize = sizeof (struct dataset) + req->key_len; @@ -150,9 +150,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, + sizeof (struct dataset) + req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, &dataset->strdata, req->key_len, &dataset->head, true, db, owner, he == NULL); @@ -162,8 +159,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, if (dh != NULL) dh->usable = false; } - else - ++db->head->addfailed; } } else @@ -221,13 +216,8 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, questionable whether it is worthwhile complicating the cache handling just for handling such a special case. */ if (he == NULL && h_addr_list_cnt == 1) - { - dataset = (struct dataset *) mempool_alloc (db, - total + req->key_len, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + req->key_len, + 1); if (dataset == NULL) { @@ -316,7 +306,7 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, struct dataset *newp = (struct dataset *) mempool_alloc (db, total + req->key_len, - IDX_result_data); + 1); if (newp != NULL) { /* Adjust pointers into the memory block. */ @@ -329,8 +319,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, dataset = memcpy (newp, dataset, total + req->key_len); alloca_used = false; } - else - ++db->head->addfailed; } /* Mark the old record as obsolete. */ @@ -400,9 +388,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req, addr_list_type = (hst->h_length == NS_INADDRSZ ? GETHOSTBYADDR : GETHOSTBYADDRv6); - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - /* NB: the following code is really complicated. It has seemlingly duplicated code paths which do the same. The problem is that we always must add the hash table entry diff --git a/nscd/initgrcache.c b/nscd/initgrcache.c index c5693c6..c33aaf3 100644 --- a/nscd/initgrcache.c +++ b/nscd/initgrcache.c @@ -1,5 +1,5 @@ /* Cache handling for host lookup. - Copyright (C) 2004, 2005, 2006, 2008 Free Software Foundation, Inc. + Copyright (C) 2004, 2005, 2006, 2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2004. @@ -54,7 +54,7 @@ static const initgr_response_header notfound = static void addinitgroupsX (struct database_dyn *db, int fd, request_header *req, - void *key, uid_t uid, struct hashentry *he, + void *key, uid_t uid, struct hashentry *const he, struct datahead *dh) { /* Search for the entry matching the key. Please note that we don't @@ -198,5 +198,5 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, dh->usable = false; } - else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, IDX_result_data)) != NULL) + else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1)) != NULL) { dataset->head.allocsize = sizeof (struct dataset) + req->key_len; @@ -227,9 +227,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, + sizeof (struct dataset) + req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, uid, he == NULL); @@ -239,8 +236,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, if (dh != NULL) dh->usable = false; } - else - ++db->head->addfailed; } } else @@ -257,13 +252,8 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, dataset = NULL; if (he == NULL) - { - dataset = (struct dataset *) mempool_alloc (db, - total + req->key_len, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + req->key_len, + 1); if (dataset == NULL) { @@ -334,7 +324,7 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, appropriate memory and copy it. */ struct dataset *newp = (struct dataset *) mempool_alloc (db, total + req->key_len, - IDX_result_data); + 1); if (newp != NULL) { /* Adjust pointer into the memory block. */ @@ -343,8 +333,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, dataset = memcpy (newp, dataset, total + req->key_len); alloca_used = false; } - else - ++db->head->addfailed; /* Mark the old record as obsolete. */ dh->usable = false; @@ -398,9 +386,6 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (INITGROUPS, cp, req->key_len, &dataset->head, true, db, uid, he == NULL); diff --git a/nscd/mem.c b/nscd/mem.c index 7f3ea06..fcea6db 100644 --- a/nscd/mem.c +++ b/nscd/mem.c @@ -197,32 +197,6 @@ gc (struct database_dyn *db) } assert (cnt == db->head->nentries); - /* Go through the list of in-flight memory blocks. */ - struct mem_in_flight *mrunp = mem_in_flight_list; - while (mrunp != NULL) - { - /* NB: There can be no race between this test and another thread - setting the field to the index we are looking for because - this would require the other thread to also have the memlock - for the database. - - NB2: we do not have to look at latter blocks (higher indices) if - earlier blocks are not in flight. They are always allocated in - sequence. */ - for (enum in_flight idx = IDX_result_data; - idx < IDX_last && mrunp->block[idx].dbidx == db - dbs; ++idx) - { - assert (mrunp->block[idx].blockoff >= 0); - assert (mrunp->block[idx].blocklen < db->memsize); - assert (mrunp->block[idx].blockoff - + mrunp->block[0].blocklen <= db->memsize); - markrange (mark, mrunp->block[idx].blockoff, - mrunp->block[idx].blocklen); - } - - mrunp = mrunp->next; - } - /* Sort the entries by the addresses of the referenced data. All the entries pointing to the same DATAHEAD object will have the same key. Stability of the sorting is unimportant. */ @@ -540,13 +514,16 @@ gc (struct database_dyn *db) void * -mempool_alloc (struct database_dyn *db, size_t len, enum in_flight idx) +mempool_alloc (struct database_dyn *db, size_t len, int data_alloc) { /* Make sure LEN is a multiple of our maximum alignment so we can keep track of used memory is multiples of this alignment value. */ if ((len & BLOCK_ALIGN_M1) != 0) len += BLOCK_ALIGN - (len & BLOCK_ALIGN_M1); + if (data_alloc) + pthread_rwlock_rdlock (&db->lock); + pthread_mutex_lock (&db->memlock); assert ((db->head->first_free & BLOCK_ALIGN_M1) == 0); @@ -589,6 +566,9 @@ mempool_alloc (struct database_dyn *db, size_t len, enum in_flight idx) } } + if (data_alloc) + pthread_rwlock_unlock (&db->lock); + if (! db->last_alloc_failed) { dbg_log (_("no more memory for database '%s'"), dbnames[db - dbs]); @@ -596,17 +576,13 @@ mempool_alloc (struct database_dyn *db, size_t len, enum in_flight idx) db->last_alloc_failed = true; } + ++db->head->addfailed; + /* No luck. */ res = NULL; } else { - /* Remember that we have allocated this memory. */ - assert (idx >= 0 && idx < IDX_last); - mem_in_flight.block[idx].dbidx = db - dbs; - mem_in_flight.block[idx].blocklen = len; - mem_in_flight.block[idx].blockoff = db->head->first_free; - db->head->first_free += len; db->last_alloc_failed = false; diff --git a/nscd/nscd.h b/nscd/nscd.h index 2d77bab..3279b85 100644 --- a/nscd/nscd.h +++ b/nscd/nscd.h @@ -1,5 +1,4 @@ -/* Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008 - Free Software Foundation, Inc. +/* Copyright (c) 1998-2001, 2003-2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998. @@ -184,31 +183,6 @@ extern uid_t old_uid; extern gid_t old_gid; -/* Memory allocation in flight. Each thread can have a limited number - of allocation in flight. No need to create dynamic data - structures. We use fixed indices. */ -enum in_flight - { - IDX_result_data = 0, - /* Keep the IDX_record_data entry last at all times. */ - IDX_record_data = 1, - IDX_last - }; -extern __thread struct mem_in_flight -{ - struct - { - int dbidx; - nscd_ssize_t blocklen; - nscd_ssize_t blockoff; - } block[IDX_last]; - - struct mem_in_flight *next; -} mem_in_flight attribute_tls_model_ie; -/* Global list of the mem_in_flight variables of all the threads. */ -extern struct mem_in_flight *mem_in_flight_list; - - /* Prototypes for global functions. */ /* nscd.c */ @@ -301,7 +275,7 @@ extern void readdservbyport (struct database_dyn *db, struct hashentry *he, /* mem.c */ extern void *mempool_alloc (struct database_dyn *db, size_t len, - enum in_flight idx); + int data_alloc); extern void gc (struct database_dyn *db); diff --git a/nscd/pwdcache.c b/nscd/pwdcache.c index 782b101..2338e7e 100644 --- a/nscd/pwdcache.c +++ b/nscd/pwdcache.c @@ -1,5 +1,5 @@ /* Cache handling for passwd lookup. - Copyright (C) 1998-2005, 2006, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 1998-2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -80,7 +80,7 @@ static const pw_response_header notfound = static void cache_addpw (struct database_dyn *db, int fd, request_header *req, const void *key, struct passwd *pwd, uid_t owner, - struct hashentry *he, struct datahead *dh, int errval) + struct hashentry *const he, struct datahead *dh, int errval) { ssize_t total; ssize_t written; @@ -121,5 +121,5 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, dh->usable = false; } - else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, IDX_result_data)) != NULL) + else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1)) != NULL) { dataset->head.allocsize = sizeof (struct dataset) + req->key_len; @@ -150,9 +150,6 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, + sizeof (struct dataset) + req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, owner, he == NULL); @@ -162,8 +159,6 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, if (dh != NULL) dh->usable = false; } - else - ++db->head->addfailed; } } else @@ -197,12 +192,7 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, dataset = NULL; if (he == NULL) - { - dataset = (struct dataset *) mempool_alloc (db, total + n, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + n, 1); if (dataset == NULL) { @@ -257,19 +247,10 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, { assert (fd == -1); -#if 0 - if (dataset->head.datasize == dh->allocsize + if (dataset->head.allocsize == dh->allocsize && dataset->head.recsize == dh->recsize && memcmp (&dataset->resp, dh->data, dh->allocsize - offsetof (struct dataset, resp)) == 0) -#else - if (dataset->head.allocsize != dh->allocsize) - goto nnn; - if (dataset->head.recsize != dh->recsize) - goto nnn; - if(memcmp (&dataset->resp, dh->data, - dh->allocsize - offsetof (struct dataset, resp)) == 0) -#endif { /* The data has not changed. We will just bump the timeout value. Note that the new record has been @@ -279,12 +260,10 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, } else { - nnn:; /* We have to create a new record. Just allocate appropriate memory and copy it. */ struct dataset *newp - = (struct dataset *) mempool_alloc (db, total + n, - IDX_result_data); + = (struct dataset *) mempool_alloc (db, total + n, 1); if (newp != NULL) { /* Adjust pointer into the memory block. */ @@ -294,8 +273,6 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, dataset = memcpy (newp, dataset, total + n); alloca_used = false; } - else - ++db->head->addfailed; /* Mark the old record as obsolete. */ dh->usable = false; @@ -349,9 +326,6 @@ cache_addpw (struct database_dyn *db, int fd, request_header *req, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - /* NB: in the following code we always must add the entry marked with FIRST first. Otherwise we end up with dangling "pointers" in case a latter hash entry cannot be diff --git a/nscd/servicescache.c b/nscd/servicescache.c index 44f12a3..dc98d30 100644 --- a/nscd/servicescache.c +++ b/nscd/servicescache.c @@ -1,5 +1,5 @@ /* Cache handling for services lookup. - Copyright (C) 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@drepper.com>, 2007. @@ -64,7 +64,7 @@ static const serv_response_header notfound = static void cache_addserv (struct database_dyn *db, int fd, request_header *req, const void *key, struct servent *serv, uid_t owner, - struct hashentry *he, struct datahead *dh, int errval) + struct hashentry *const he, struct datahead *dh, int errval) { ssize_t total; ssize_t written; @@ -104,7 +104,7 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, MSG_NOSIGNAL)); dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, - IDX_result_data); + 1); /* If we cannot permanently store the result, so be it. */ if (dataset != NULL) { @@ -133,9 +133,6 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, + sizeof (struct dataset) + req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, &dataset->strdata, req->key_len, &dataset->head, true, db, owner, he == NULL); @@ -145,8 +142,6 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, if (dh != NULL) dh->usable = false; } - else - ++db->head->addfailed; } } else @@ -187,13 +182,8 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, dataset = NULL; if (he == NULL) - { - dataset = (struct dataset *) mempool_alloc (db, - total + req->key_len, - IDX_result_data); - if (dataset == NULL) - ++db->head->addfailed; - } + dataset = (struct dataset *) mempool_alloc (db, total + req->key_len, + 1); if (dataset == NULL) { @@ -262,7 +252,7 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, appropriate memory and copy it. */ struct dataset *newp = (struct dataset *) mempool_alloc (db, total + req->key_len, - IDX_result_data); + 1); if (newp != NULL) { /* Adjust pointers into the memory block. */ @@ -273,8 +263,6 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, dataset = memcpy (newp, dataset, total + req->key_len); alloca_used = false; } - else - ++db->head->addfailed; /* Mark the old record as obsolete. */ dh->usable = false; @@ -327,9 +315,6 @@ cache_addserv (struct database_dyn *db, int fd, request_header *req, + total + req->key_len, MS_ASYNC); } - /* Now get the lock to safely insert the records. */ - pthread_rwlock_rdlock (&db->lock); - (void) cache_add (req->type, key_copy, req->key_len, &dataset->head, true, db, owner, he == NULL);
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