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Commit f3e2a520 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
Browse files

ufs: NFS support 



Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: default avatarEvgeniy Dushistov <dushistov@mail.ru>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 08049707

fs/ufs/super.c

+52 −0
Original line number Original line Diff line number Diff line
@@ -66,6 +66,7 @@ 
 */

 */









#include <linux/exportfs.h>

#include <linux/module.h>

#include <linux/module.h>

#include <linux/bitops.h>

#include <linux/bitops.h>
@@ -96,6 +97,56 @@ 
#include "swab.h"

#include "swab.h"

#include "util.h"

#include "util.h"





static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)

{

	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;

	struct inode *inode;



	if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)

		return ERR_PTR(-ESTALE);



	inode = ufs_iget(sb, ino);

	if (IS_ERR(inode))

		return ERR_CAST(inode);

	if (generation && inode->i_generation != generation) {

		iput(inode);

		return ERR_PTR(-ESTALE);

	}

	return inode;

}



static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,

				       int fh_len, int fh_type)

{

	return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);

}



static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,

				       int fh_len, int fh_type)

{

	return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);

}



static struct dentry *ufs_get_parent(struct dentry *child)

{

	struct qstr dot_dot = {

		.name	= "..",

		.len	= 2,

	};

	ino_t ino;



	ino = ufs_inode_by_name(child->d_inode, &dot_dot);

	if (!ino)

		return ERR_PTR(-ENOENT);

	return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));

}



static const struct export_operations ufs_export_ops = {

	.fh_to_dentry	= ufs_fh_to_dentry,

	.fh_to_parent	= ufs_fh_to_parent,

	.get_parent	= ufs_get_parent,

};



#ifdef CONFIG_UFS_DEBUG

#ifdef CONFIG_UFS_DEBUG

/*

/*

 * Print contents of ufs_super_block, useful for debugging

 * Print contents of ufs_super_block, useful for debugging
@@ -990,6 +1041,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent) 
	 * Read ufs_super_block into internal data structures

	 * Read ufs_super_block into internal data structures

	 */

	 */

	sb->s_op = &ufs_super_ops;

	sb->s_op = &ufs_super_ops;

	sb->s_export_op = &ufs_export_ops;

	sb->dq_op = NULL; /***/

	sb->dq_op = NULL; /***/

	sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);

	sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);