kernel/NFSv4-Reduce-the-footprint-of-the-idmapper.patch

47 lines
1.3 KiB
Diff

diff -up linux-3.2.noarch/fs/nfs/idmap.c.orig linux-3.2.noarch/fs/nfs/idmap.c
--- linux-3.2.noarch/fs/nfs/idmap.c.orig 2012-02-07 07:12:52.585471833 -0500
+++ linux-3.2.noarch/fs/nfs/idmap.c 2012-03-14 13:08:37.462928792 -0400
@@ -360,7 +360,7 @@ struct idmap_hashent {
unsigned long ih_expires;
__u32 ih_id;
size_t ih_namelen;
- char ih_name[IDMAP_NAMESZ];
+ const char *ih_name;
};
struct idmap_hashtable {
@@ -424,11 +424,16 @@ void
nfs_idmap_delete(struct nfs_client *clp)
{
struct idmap *idmap = clp->cl_idmap;
+ int i;
if (!idmap)
return;
rpc_unlink(idmap->idmap_dentry);
clp->cl_idmap = NULL;
+ for (i = 0; i < ARRAY_SIZE(idmap->idmap_user_hash.h_entries); i++)
+ kfree(idmap->idmap_user_hash.h_entries[i].ih_name);
+ for (i = 0; i < ARRAY_SIZE(idmap->idmap_group_hash.h_entries); i++)
+ kfree(idmap->idmap_group_hash.h_entries[i].ih_name);
kfree(idmap);
}
@@ -491,9 +496,14 @@ static void
idmap_update_entry(struct idmap_hashent *he, const char *name,
size_t namelen, __u32 id)
{
+ char *str = kmalloc(namelen + 1, GFP_KERNEL);
+ if (str == NULL)
+ return;
+ kfree(he->ih_name);
he->ih_id = id;
- memcpy(he->ih_name, name, namelen);
- he->ih_name[namelen] = '\0';
+ memcpy(str, name, namelen);
+ str[namelen] = '\0';
+ he->ih_name = str;
he->ih_namelen = namelen;
he->ih_expires = jiffies + nfs_idmap_cache_timeout;
}