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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-04-16 16:22:46 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-05-14 15:09:22 -0400
commit364d015e5208e4669a4ae9fab2ab104ff26bc159 (patch)
tree33d949fe10f70dda0d9ab018e6c47595c25b700b /fs/nfs
parentfbca779a8d240d82ef1439247033fd491f81547c (diff)
downloadlinux-364d015e5208e4669a4ae9fab2ab104ff26bc159.tar.bz2
NFSv4: Reduce the stack footprint of try_location()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4namespace.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index f071d12c613b..832f9b50f7a0 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -115,6 +115,7 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
char *page, char *page2,
const struct nfs4_fs_location *location)
{
+ const size_t addr_bufsize = sizeof(struct sockaddr_storage);
struct vfsmount *mnt = ERR_PTR(-ENOENT);
char *mnt_path;
unsigned int maxbuflen;
@@ -126,9 +127,12 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
mountdata->mnt_path = mnt_path;
maxbuflen = mnt_path - 1 - page2;
+ mountdata->addr = kmalloc(addr_bufsize, GFP_KERNEL);
+ if (mountdata->addr == NULL)
+ return ERR_PTR(-ENOMEM);
+
for (s = 0; s < location->nservers; s++) {
const struct nfs4_string *buf = &location->servers[s];
- struct sockaddr_storage addr;
if (buf->len <= 0 || buf->len >= maxbuflen)
continue;
@@ -137,11 +141,10 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
continue;
mountdata->addrlen = nfs_parse_server_name(buf->data, buf->len,
- (struct sockaddr *)&addr, sizeof(addr));
+ mountdata->addr, addr_bufsize);
if (mountdata->addrlen == 0)
continue;
- mountdata->addr = (struct sockaddr *)&addr;
rpc_set_port(mountdata->addr, NFS_PORT);
memcpy(page2, buf->data, buf->len);
@@ -156,6 +159,7 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
if (!IS_ERR(mnt))
break;
}
+ kfree(mountdata->addr);
return mnt;
}