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authorJ. Bruce Fields <bfields@citi.umich.edu>2007-11-09 14:10:56 -0500
committerJ. Bruce Fields <bfields@citi.umich.edu>2008-02-01 16:42:04 -0500
commitd5c3428b2cb26d605fddc4878f4fcc03c23df89f (patch)
treeb476ca0b6709b65044f222912f2fdd2efbdcf297 /fs/nfsd
parent26808d3f10b1213bbb6e27d441be40e20ab84611 (diff)
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nfsd: fail module init on reply cache init failure
If the reply cache initialization fails due to a kmalloc failure, currently we try to soldier on with a reduced (or nonexistant) reply cache. Better to just fail immediately: the failure is then much easier to understand and debug, and it could save us complexity in some later code. (But actually, it doesn't help currently because the cache is also turned off in some odd failure cases; we should probably find a better way to handle those failure cases some day.) Fix some minor style problems while we're at it, and rename nfsd_cache_init() to remove the need for a comment describing it. Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfscache.c28
-rw-r--r--fs/nfsd/nfsctl.c11
2 files changed, 19 insertions, 20 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 578f2c9d56be..5bfc2ac60d54 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -44,17 +44,17 @@ static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
*/
static DEFINE_SPINLOCK(cache_lock);
-void
-nfsd_cache_init(void)
+int nfsd_reply_cache_init(void)
{
struct svc_cacherep *rp;
int i;
INIT_LIST_HEAD(&lru_head);
i = CACHESIZE;
- while(i) {
+ while (i) {
rp = kmalloc(sizeof(*rp), GFP_KERNEL);
- if (!rp) break;
+ if (!rp)
+ goto out_nomem;
list_add(&rp->c_lru, &lru_head);
rp->c_state = RC_UNUSED;
rp->c_type = RC_NOCACHE;
@@ -62,23 +62,19 @@ nfsd_cache_init(void)
i--;
}
- if (i)
- printk (KERN_ERR "nfsd: cannot allocate all %d cache entries, only got %d\n",
- CACHESIZE, CACHESIZE-i);
-
hash_list = kcalloc (HASHSIZE, sizeof(struct hlist_head), GFP_KERNEL);
- if (!hash_list) {
- nfsd_cache_shutdown();
- printk (KERN_ERR "nfsd: cannot allocate %Zd bytes for hash list\n",
- HASHSIZE * sizeof(struct hlist_head));
- return;
- }
+ if (!hash_list)
+ goto out_nomem;
cache_disabled = 0;
+ return 0;
+out_nomem:
+ printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
+ nfsd_reply_cache_shutdown();
+ return -ENOMEM;
}
-void
-nfsd_cache_shutdown(void)
+void nfsd_reply_cache_shutdown(void)
{
struct svc_cacherep *rp;
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index ecf377944286..2bfda9b8f504 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -683,7 +683,9 @@ static int __init init_nfsd(void)
if (retval)
return retval;
nfsd_stat_init(); /* Statistics */
- nfsd_cache_init(); /* RPC reply cache */
+ retval = nfsd_reply_cache_init();
+ if (retval)
+ goto out_free_stat;
nfsd_export_init(); /* Exports table */
nfsd_lockd_init(); /* lockd->nfsd callbacks */
nfsd_idmap_init(); /* Name to ID mapping */
@@ -700,11 +702,12 @@ static int __init init_nfsd(void)
out_free_all:
nfsd_idmap_shutdown();
nfsd_export_shutdown();
- nfsd_cache_shutdown();
+ nfsd_reply_cache_shutdown();
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
- nfsd_stat_shutdown();
nfsd_lockd_shutdown();
+out_free_stat:
+ nfsd_stat_shutdown();
nfsd4_free_slabs();
return retval;
}
@@ -712,7 +715,7 @@ out_free_all:
static void __exit exit_nfsd(void)
{
nfsd_export_shutdown();
- nfsd_cache_shutdown();
+ nfsd_reply_cache_shutdown();
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
nfsd_stat_shutdown();