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NFS: Reduce the stack footprint of nfs_proc_symlink() 

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2010-04-16 16:22:51 -04:00
parent eb872f0c8e
commit 23a306120f
1 changed files with 17 additions and 11 deletions
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28
fs/nfs/proc.c
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@ -418,8 +418,8 @@ static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
unsigned int len, struct iattr *sattr) unsigned int len, struct iattr *sattr)
{ {
struct nfs_fh fhandle; struct nfs_fh *fh;
struct nfs_fattr fattr; struct nfs_fattr *fattr;
struct nfs_symlinkargs arg = { struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir), .fromfh = NFS_FH(dir),
.fromname = dentry->d_name.name, .fromname = dentry->d_name.name,
@ -432,13 +432,19 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
.rpc_argp = &arg, .rpc_argp = &arg,
}; };
int status; int status = -ENAMETOOLONG;
if (len > NFS2_MAXPATHLEN)
return -ENAMETOOLONG;
dprintk("NFS call symlink %s\n", dentry->d_name.name); dprintk("NFS call symlink %s\n", dentry->d_name.name);
if (len > NFS2_MAXPATHLEN)
goto out;
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); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir); 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 * filehandle size to zero indicates to nfs_instantiate that it
* should fill in the data with a LOOKUP call on the wire. * should fill in the data with a LOOKUP call on the wire.
*/ */
if (status == 0) { if (status == 0)
nfs_fattr_init(&fattr); status = nfs_instantiate(dentry, fh, fattr);
fhandle.size = 0;
status = nfs_instantiate(dentry, &fhandle, &fattr);
}
nfs_free_fattr(fattr);
nfs_free_fhandle(fh);
out:
dprintk("NFS reply symlink: %d\n", status); dprintk("NFS reply symlink: %d\n", status);
return status; return status;
} }