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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-04-16 16:22:49 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-05-14 15:09:25 -0400
commitaa49b4cf7dbf45438563f0ff6a2d23a68b70a7b9 (patch)
tree39304ffe1812f5407dc20bc77c6dccfa2d060912 /fs/nfs
parent011fff7239eb90e33e7bebba48bf596fced06eb9 (diff)
downloadlinux-aa49b4cf7dbf45438563f0ff6a2d23a68b70a7b9.tar.bz2
NFS: Reduce stack footprint of nfs_readdir()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/dir.c17
-rw-r--r--fs/nfs/nfs3proc.c13
2 files changed, 18 insertions, 12 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 1debc09eb55f..18da8abbece8 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -530,9 +530,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
nfs_readdir_descriptor_t my_desc,
*desc = &my_desc;
struct nfs_entry my_entry;
- struct nfs_fh fh;
- struct nfs_fattr fattr;
- long res;
+ int res = -ENOMEM;
dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
@@ -554,9 +552,11 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
my_entry.cookie = my_entry.prev_cookie = 0;
my_entry.eof = 0;
- my_entry.fh = &fh;
- my_entry.fattr = &fattr;
- nfs_fattr_init(&fattr);
+ my_entry.fh = nfs_alloc_fhandle();
+ my_entry.fattr = nfs_alloc_fattr();
+ if (my_entry.fh == NULL || my_entry.fattr == NULL)
+ goto out_alloc_failed;
+
desc->entry = &my_entry;
nfs_block_sillyrename(dentry);
@@ -598,7 +598,10 @@ out:
nfs_unblock_sillyrename(dentry);
if (res > 0)
res = 0;
- dfprintk(FILE, "NFS: readdir(%s/%s) returns %ld\n",
+out_alloc_failed:
+ nfs_free_fattr(my_entry.fattr);
+ nfs_free_fhandle(my_entry.fh);
+ dfprintk(FILE, "NFS: readdir(%s/%s) returns %d\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
res);
return res;
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index c252fc983a7e..1c5bfb3d6f08 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -597,7 +597,6 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page *page, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
- struct nfs_fattr dir_attr;
__be32 *verf = NFS_COOKIEVERF(dir);
struct nfs3_readdirargs arg = {
.fh = NFS_FH(dir),
@@ -608,7 +607,6 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
.pages = &page
};
struct nfs3_readdirres res = {
- .dir_attr = &dir_attr,
.verf = verf,
.plus = plus
};
@@ -618,7 +616,7 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
.rpc_resp = &res,
.rpc_cred = cred
};
- int status;
+ int status = -ENOMEM;
if (plus)
msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
@@ -626,12 +624,17 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
dprintk("NFS call readdir%s %d\n",
plus? "plus" : "", (unsigned int) cookie);
- nfs_fattr_init(&dir_attr);
+ res.dir_attr = nfs_alloc_fattr();
+ if (res.dir_attr == NULL)
+ goto out;
+
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_invalidate_atime(dir);
+ nfs_refresh_inode(dir, res.dir_attr);
- nfs_refresh_inode(dir, &dir_attr);
+ nfs_free_fattr(res.dir_attr);
+out:
dprintk("NFS reply readdir: %d\n", status);
return status;
}