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knfsd: exportfs: add procedural interface for NFSD

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Currently NFSD calls directly into filesystems through the export_operations
structure.  I plan to change this interface in various ways in later patches,
and want to avoid the export of the default operations to NFSD, so this patch
adds two simple exportfs_encode_fh/exportfs_decode_fh helpers for NFSD to call
instead of poking into exportfs guts.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2007-07-17 04:04:30 -07:00 • committed by Linus Torvalds
parent 5ca2960733
commit d37065cd6d
3 changed files with 33 additions and 14 deletions
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22
fs/exportfs/expfs.c
View file

@ -3,6 +3,7 @@
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/namei.h>
struct export_operations export_op_default;
@ -468,6 +469,26 @@ static struct dentry *export_decode_fh(struct super_block *sb, __u32 *fh, int fh
acceptable, context);
}
int exportfs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len,
int connectable)
{
struct export_operations *nop = dentry->d_sb->s_export_op;
return CALL(nop, encode_fh)(dentry, fh, max_len, connectable);
}
EXPORT_SYMBOL_GPL(exportfs_encode_fh);
struct dentry *exportfs_decode_fh(struct vfsmount *mnt, __u32 *fh, int fh_len,
int fileid_type, int (*acceptable)(void *, struct dentry *),
void *context)
{
struct export_operations *nop = mnt->mnt_sb->s_export_op;
return CALL(nop, decode_fh)(mnt->mnt_sb, fh, fh_len, fileid_type,
acceptable, context);
}
EXPORT_SYMBOL_GPL(exportfs_decode_fh);
struct export_operations export_op_default = {
.decode_fh = export_decode_fh,
.encode_fh = export_encode_fh,
@ -477,7 +498,6 @@ struct export_operations export_op_default = {
.get_dentry = get_dentry,
};
EXPORT_SYMBOL(export_op_default);
EXPORT_SYMBOL(find_exported_dentry);
MODULE_LICENSE("GPL");