From: Fabian Frederick <fabf@skynet.be>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>, Alexander Viro <viro@zeniv.linux.org.uk>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
fabf@skynet.be
Subject: [PATCH V2 3/7 linux-next] fs/affs: make affs exportable
Date: Mon, 9 Jan 2017 20:12:04 +0100 [thread overview]
Message-ID: <20170109191208.6085-4-fabf@skynet.be> (raw)
In-Reply-To: <20170109191208.6085-1-fabf@skynet.be>
Add standard functions making AFFS work with NFS.
Functions based on ext4 implementation.
Tested on loop device.
Signed-off-by: Fabian Frederick <fabf@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
next prev parent reply other threads:[~2017-01-09 19:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-09 19:12 [PATCH V2 0/7 linux-next] make FS exportable plus some clean-up Fabian Frederick
2017-01-09 19:12 ` [PATCH V2 1/7 linux-next] fs/affs: remove reference to affs_parent_ino() Fabian Frederick
2017-01-09 19:12 ` [PATCH V2 2/7 linux-next] fs/affs: add validation block function Fabian Frederick
2017-01-09 19:12 ` Fabian Frederick [this message]
2017-01-09 19:12 ` [PATCH V2 4/7 linux-next] fs/affs: use octal for permissions Fabian Frederick
2017-01-09 19:12 ` [PATCH V2 5/7 linux-next] fs/affs: add prefix to some functions Fabian Frederick
2017-01-09 19:12 ` [PATCH V2 6/7 linux-next] fs/affs/namei.c: forward declarations clean-up Fabian Frederick
2017-01-09 19:12 ` [PATCH V2 7/7 linux-next] fs/affs: make export work with cold dcache Fabian Frederick
2017-01-18 18:46 ` [PATCH V2 0/7 linux-next] make FS exportable plus some clean-up Fabian Frederick
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