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Commit 8cf74b39 authored by Boaz Harrosh's avatar Boaz Harrosh
Browse files

exofs: export_operations 



implement export_operations and set in superblock.
It is now posible to export exofs via nfs

Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
parent ba9e5e98

fs/exofs/dir.c

+15 −0
Original line number Diff line number Diff line
@@ -381,6 +381,21 @@ struct exofs_dir_entry *exofs_dotdot(struct inode *dir, struct page **p) 
	return de;

}



ino_t exofs_parent_ino(struct dentry *child)

{

	struct page *page;

	struct exofs_dir_entry *de;

	ino_t ino;



	de = exofs_dotdot(child->d_inode, &page);

	if (!de)

		return 0;



	ino = le64_to_cpu(de->inode_no);

	exofs_put_page(page);

	return ino;

}



ino_t exofs_inode_by_name(struct inode *dir, struct dentry *dentry)

{

	ino_t res = 0;

fs/exofs/exofs.h

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *, 
					 struct page **);

int exofs_empty_dir(struct inode *);

struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);

ino_t exofs_parent_ino(struct dentry *child);

int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,

		    struct inode *);

fs/exofs/super.c

+53 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 
#include <linux/parser.h>

#include <linux/vfs.h>

#include <linux/random.h>

#include <linux/exportfs.h>



#include "exofs.h"
@@ -194,6 +195,7 @@ static void destroy_inodecache(void) 
 * SUPERBLOCK FUNCTIONS

 *****************************************************************************/

static const struct super_operations exofs_sops;

static const struct export_operations exofs_export_ops;



/*

 * Write the superblock to the OSD
@@ -358,6 +360,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent) 


	/* set up operation vectors */

	sb->s_op = &exofs_sops;

	sb->s_export_op = &exofs_export_ops;

	root = exofs_iget(sb, EXOFS_ROOT_ID - EXOFS_OBJ_OFF);

	if (IS_ERR(root)) {

		EXOFS_ERR("ERROR: exofs_iget failed\n");
@@ -484,6 +487,56 @@ static const struct super_operations exofs_sops = { 
	.statfs         = exofs_statfs,

};



/******************************************************************************

 * EXPORT OPERATIONS

 *****************************************************************************/



struct dentry *exofs_get_parent(struct dentry *child)

{

	unsigned long ino = exofs_parent_ino(child);



	if (!ino)

		return NULL;



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

}



static struct inode *exofs_nfs_get_inode(struct super_block *sb,

		u64 ino, u32 generation)

{

	struct inode *inode;



	inode = exofs_iget(sb, ino);

	if (IS_ERR(inode))

		return ERR_CAST(inode);

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

		/* we didn't find the right inode.. */

		iput(inode);

		return ERR_PTR(-ESTALE);

	}

	return inode;

}



static struct dentry *exofs_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,

				    exofs_nfs_get_inode);

}



static struct dentry *exofs_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,

				    exofs_nfs_get_inode);

}



static const struct export_operations exofs_export_ops = {

	.fh_to_dentry = exofs_fh_to_dentry,

	.fh_to_parent = exofs_fh_to_parent,

	.get_parent = exofs_get_parent,

};



/******************************************************************************

 * INSMOD/RMMOD

 *****************************************************************************/