befs: add NFS export support
Implement mandatory export_operations, so it is possible to export befs via nfs. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
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@ -18,6 +18,7 @@
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#include <linux/parser.h>
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#include <linux/parser.h>
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#include <linux/namei.h>
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#include <linux/namei.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/exportfs.h>
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#include "befs.h"
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#include "befs.h"
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#include "btree.h"
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#include "btree.h"
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@ -52,6 +53,10 @@ static void befs_put_super(struct super_block *);
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static int befs_remount(struct super_block *, int *, char *);
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static int befs_remount(struct super_block *, int *, char *);
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static int befs_statfs(struct dentry *, struct kstatfs *);
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static int befs_statfs(struct dentry *, struct kstatfs *);
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static int parse_options(char *, struct befs_mount_options *);
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static int parse_options(char *, struct befs_mount_options *);
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static struct dentry *befs_fh_to_dentry(struct super_block *sb,
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struct fid *fid, int fh_len, int fh_type);
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static struct dentry *befs_fh_to_parent(struct super_block *sb,
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struct fid *fid, int fh_len, int fh_type);
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static const struct super_operations befs_sops = {
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static const struct super_operations befs_sops = {
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.alloc_inode = befs_alloc_inode, /* allocate a new inode */
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.alloc_inode = befs_alloc_inode, /* allocate a new inode */
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@ -84,6 +89,11 @@ static const struct address_space_operations befs_symlink_aops = {
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.readpage = befs_symlink_readpage,
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.readpage = befs_symlink_readpage,
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};
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};
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static const struct export_operations befs_export_operations = {
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.fh_to_dentry = befs_fh_to_dentry,
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.fh_to_parent = befs_fh_to_parent,
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};
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/*
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/*
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* Called by generic_file_read() to read a page of data
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* Called by generic_file_read() to read a page of data
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*
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*
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@ -629,6 +639,33 @@ conv_err:
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return -EILSEQ;
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return -EILSEQ;
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}
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}
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static struct inode *befs_nfs_get_inode(struct super_block *sb, uint64_t ino,
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uint32_t generation)
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{
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/* No need to handle i_generation */
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return befs_iget(sb, ino);
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}
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/*
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* Map a NFS file handle to a corresponding dentry
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*/
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static struct dentry *befs_fh_to_dentry(struct super_block *sb,
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struct fid *fid, int fh_len, int fh_type)
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{
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return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
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befs_nfs_get_inode);
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}
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/*
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* Find the parent for a file specified by NFS handle
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*/
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static struct dentry *befs_fh_to_parent(struct super_block *sb,
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struct fid *fid, int fh_len, int fh_type)
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{
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return generic_fh_to_parent(sb, fid, fh_len, fh_type,
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befs_nfs_get_inode);
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}
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enum {
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enum {
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Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
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Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
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};
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};
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@ -829,6 +866,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
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/* Set real blocksize of fs */
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/* Set real blocksize of fs */
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sb_set_blocksize(sb, (ulong) befs_sb->block_size);
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sb_set_blocksize(sb, (ulong) befs_sb->block_size);
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sb->s_op = &befs_sops;
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sb->s_op = &befs_sops;
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sb->s_export_op = &befs_export_operations;
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root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
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root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
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if (IS_ERR(root)) {
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if (IS_ERR(root)) {
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ret = PTR_ERR(root);
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ret = PTR_ERR(root);
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