Commit ed4433d7 authored by Fabian Frederick's avatar Fabian Frederick Committed by Linus Torvalds

fs/affs: make affs exportable

Add standard functions making AFFS work with NFS.

Functions based on ext4 implementation.  Tested on loop device.

Link: http://lkml.kernel.org/r/20170109191208.6085-4-fabf@skynet.beSigned-off-by: default avatarFabian Frederick <fabf@skynet.be>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d5de9fd5
...@@ -162,6 +162,7 @@ extern void affs_free_bitmap(struct super_block *sb); ...@@ -162,6 +162,7 @@ extern void affs_free_bitmap(struct super_block *sb);
/* namei.c */ /* namei.c */
extern const struct export_operations affs_export_ops;
extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len); extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
extern int affs_unlink(struct inode *dir, struct dentry *dentry); extern int affs_unlink(struct inode *dir, struct dentry *dentry);
......
...@@ -9,6 +9,7 @@ ...@@ -9,6 +9,7 @@
*/ */
#include "affs.h" #include "affs.h"
#include <linux/exportfs.h>
typedef int (*toupper_t)(int); typedef int (*toupper_t)(int);
...@@ -465,3 +466,42 @@ affs_rename(struct inode *old_dir, struct dentry *old_dentry, ...@@ -465,3 +466,42 @@ affs_rename(struct inode *old_dir, struct dentry *old_dentry,
affs_brelse(bh); affs_brelse(bh);
return retval; return retval;
} }
static struct inode *affs_nfs_get_inode(struct super_block *sb, u64 ino,
u32 generation)
{
struct inode *inode;
if (!affs_validblock(sb, ino))
return ERR_PTR(-ESTALE);
inode = affs_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 *affs_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,
affs_nfs_get_inode);
}
static struct dentry *affs_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,
affs_nfs_get_inode);
}
const struct export_operations affs_export_ops = {
.fh_to_dentry = affs_fh_to_dentry,
.fh_to_parent = affs_fh_to_parent,
};
...@@ -507,6 +507,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent) ...@@ -507,6 +507,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
return -ENOMEM; return -ENOMEM;
} }
sb->s_export_op = &affs_export_ops;
pr_debug("s_flags=%lX\n", sb->s_flags); pr_debug("s_flags=%lX\n", sb->s_flags);
return 0; return 0;
} }
......
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