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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-04-17 00:22:51 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-05-14 23:09:27 +0400
commit23a306120fcb2879ed2b814716c1cb2a8eb74f72 (patch)
treed2c8dfc11351be67956a095f82ee97417177f7d2 /fs
parenteb872f0c8e5c9801da05d5c2a6e402af8e27160e (diff)
downloadlinux-23a306120fcb2879ed2b814716c1cb2a8eb74f72.tar.xz
NFS: Reduce the stack footprint of nfs_proc_symlink()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/proc.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index aa61f2c66068..611bec22f552 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -418,8 +418,8 @@ static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
unsigned int len, struct iattr *sattr)
{
- struct nfs_fh fhandle;
- struct nfs_fattr fattr;
+ struct nfs_fh *fh;
+ struct nfs_fattr *fattr;
struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir),
.fromname = dentry->d_name.name,
@@ -432,12 +432,18 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
.rpc_argp = &arg,
};
- int status;
+ int status = -ENAMETOOLONG;
+
+ dprintk("NFS call symlink %s\n", dentry->d_name.name);
if (len > NFS2_MAXPATHLEN)
- return -ENAMETOOLONG;
+ goto out;
- dprintk("NFS call symlink %s\n", dentry->d_name.name);
+ fh = nfs_alloc_fhandle();
+ fattr = nfs_alloc_fattr();
+ status = -ENOMEM;
+ if (fh == NULL || fattr == NULL)
+ goto out;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
@@ -447,12 +453,12 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
* filehandle size to zero indicates to nfs_instantiate that it
* should fill in the data with a LOOKUP call on the wire.
*/
- if (status == 0) {
- nfs_fattr_init(&fattr);
- fhandle.size = 0;
- status = nfs_instantiate(dentry, &fhandle, &fattr);
- }
+ if (status == 0)
+ status = nfs_instantiate(dentry, fh, fattr);
+ nfs_free_fattr(fattr);
+ nfs_free_fhandle(fh);
+out:
dprintk("NFS reply symlink: %d\n", status);
return status;
}