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Commit 2d36bfde authored by Trond Myklebust's avatar Trond Myklebust
Browse files

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: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent fc54a0c6

fs/nfs/inode.c

+20 −0
Original line number Diff line number Diff line
@@ -916,6 +916,26 @@ void nfs_fattr_init(struct nfs_fattr *fattr) 
	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

include/linux/nfs_fs.h

+14 −0
Original line number Diff line number Diff line
@@ -356,6 +356,20 @@ extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struc 
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);