Add standard functions making AFFS work with NFS.
Functions based on ext4 implementation.
Tested on loop device.
Signed-off-by: Fabian Frederick <f...@skynet.be>
---
fs/affs/affs.h | 1 +
fs/affs/namei.c | 40 ++++++++++++++++++++++++++++++++++++++++
fs/affs/super.c | 1 +
3 files changed, 42 insertions(+)
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index efe6839..1b55428 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -162,6 +162,7 @@ extern void affs_free_bitmap(struct super_block *sb);
/* 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 struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry,
unsigned int);
extern int affs_unlink(struct inode *dir, struct dentry *dentry);
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 29186d2..04c3156f 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -9,6 +9,7 @@
*/
#include "affs.h"
+#include <linux/exportfs.h>
typedef int (*toupper_t)(int);
@@ -465,3 +466,42 @@ affs_rename(struct inode *old_dir, struct dentry
*old_dentry,
affs_brelse(bh);
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,
+};
diff --git a/fs/affs/super.c b/fs/affs/super.c
index d638486..98bd952 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -507,6 +507,7 @@ static int affs_fill_super(struct super_block *sb, void
*data, int silent)
return -ENOMEM;
}
+ sb->s_export_op = &affs_export_ops;
pr_debug("s_flags=%lX\n", sb->s_flags);
return 0;
}
--
2.9.3
