NFS: Add helper functions for allocating filehandles and fattr structs
NFS Filehandles and struct fattr are really too large to be allocated on
the stack. This patch adds in a couple of helper functions to allocate them
dynamically instead.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 50a56ed..0f9852a 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -916,6 +916,26 @@
fattr->gencount = nfs_inc_attr_generation_counter();
}
+struct nfs_fattr *nfs_alloc_fattr(void)
+{
+ struct nfs_fattr *fattr;
+
+ fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
+ if (fattr != NULL)
+ nfs_fattr_init(fattr);
+ return fattr;
+}
+
+struct nfs_fh *nfs_alloc_fhandle(void)
+{
+ struct nfs_fh *fh;
+
+ fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
+ if (fh != NULL)
+ fh->size = 0;
+ return fh;
+}
+
/**
* nfs_inode_attrs_need_update - check if the inode attributes need updating
* @inode - pointer to inode
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 07ce460..77c2ae5 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -356,6 +356,20 @@
extern u64 nfs_compat_user_ino64(u64 fileid);
extern void nfs_fattr_init(struct nfs_fattr *fattr);
+extern struct nfs_fattr *nfs_alloc_fattr(void);
+
+static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
+{
+ kfree(fattr);
+}
+
+extern struct nfs_fh *nfs_alloc_fhandle(void);
+
+static inline void nfs_free_fhandle(const struct nfs_fh *fh)
+{
+ kfree(fh);
+}
+
/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
extern __be32 root_nfs_parse_addr(char *name); /*__init*/
extern unsigned long nfs_inc_attr_generation_counter(void);