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befs: add NFS export support

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Implement mandatory export_operations, so it is possible to export befs via
nfs.

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
This commit is contained in:
Luis de Bethencourt 2016-11-04 15:23:12 +00:00
parent e60f749b60
commit ac632f5b63
1 changed files with 38 additions and 0 deletions
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38
fs/befs/linuxvfs.c
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@ -18,6 +18,7 @@
#include <linux/parser.h>
#include <linux/namei.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
#include "befs.h"
#include "btree.h"
@ -52,6 +53,10 @@ static void befs_put_super(struct super_block *);
static int befs_remount(struct super_block *, int *, char *);
static int befs_statfs(struct dentry *, struct kstatfs *);
static int parse_options(char *, struct befs_mount_options *);
static struct dentry *befs_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type);
static struct dentry *befs_fh_to_parent(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type);
static const struct super_operations befs_sops = {
.alloc_inode = befs_alloc_inode, /* allocate a new inode */
@ -84,6 +89,11 @@ static const struct address_space_operations befs_symlink_aops = {
.readpage = befs_symlink_readpage,
};
static const struct export_operations befs_export_operations = {
.fh_to_dentry = befs_fh_to_dentry,
.fh_to_parent = befs_fh_to_parent,
};
/*
* Called by generic_file_read() to read a page of data
*
@ -629,6 +639,33 @@ conv_err:
return -EILSEQ;
}
static struct inode *befs_nfs_get_inode(struct super_block *sb, uint64_t ino,
uint32_t generation)
{
/* No need to handle i_generation */
return befs_iget(sb, ino);
}
/*
* Map a NFS file handle to a corresponding dentry
*/
static struct dentry *befs_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,
befs_nfs_get_inode);
}
/*
* Find the parent for a file specified by NFS handle
*/
static struct dentry *befs_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,
befs_nfs_get_inode);
}
enum {
Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
};
@ -829,6 +866,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
/* Set real blocksize of fs */
sb_set_blocksize(sb, (ulong) befs_sb->block_size);
sb->s_op = &befs_sops;
sb->s_export_op = &befs_export_operations;
root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
if (IS_ERR(root)) {
ret = PTR_ERR(root);