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Commit f174ff7a authored by Peng Tao's avatar Peng Tao Committed by Anna Schumaker
Browse files

nfs: add a nfs_ilookup helper 



This helper will allow to find an existing NFS inode by the file handle
and fattr.

Signed-off-by: default avatarPeng Tao <tao.peng@primarydata.com>
[hch: split from a larger patch]
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent 774d9513

fs/nfs/inode.c

+22 −0
Original line number Diff line number Diff line
@@ -386,6 +386,28 @@ void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, 
#endif

EXPORT_SYMBOL_GPL(nfs_setsecurity);



/* Search for inode identified by fh, fileid and i_mode in inode cache. */

struct inode *

nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)

{

	struct nfs_find_desc desc = {

		.fh	= fh,

		.fattr	= fattr,

	};

	struct inode *inode;

	unsigned long hash;



	if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||

	    !(fattr->valid & NFS_ATTR_FATTR_TYPE))

		return NULL;



	hash = nfs_fattr_to_ino_t(fattr);

	inode = ilookup5(sb, hash, nfs_find_actor, &desc);



	dprintk("%s: returning %p\n", __func__, inode);

	return inode;

}



/*

 * This is our front-end to iget that looks up inodes by file handle

 * instead of inode number.

include/linux/nfs_fs.h

+1 −0
Original line number Diff line number Diff line
@@ -332,6 +332,7 @@ extern void nfs_zap_caches(struct inode *); 
extern void nfs_invalidate_atime(struct inode *);

extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,

				struct nfs_fattr *, struct nfs4_label *);

struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *);

extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);

extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);

extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);