gfs2: new export ops

Convert gfs2 to the new ops.  Uses a similar structure to the generic helpers,
but gfs2 has it's own file handle formats.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Neil Brown <neilb@suse.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index e2d1347..c291005 100644 (file)
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -31,40 +31,6 @@
 #define GFS2_LARGE_FH_SIZE 8
 #define GFS2_OLD_FH_SIZE 10
 
-static struct dentry *gfs2_decode_fh(struct super_block *sb,
-                                    __u32 *p,
-                                    int fh_len,
-                                    int fh_type,
-                                    int (*acceptable)(void *context,
-                                                      struct dentry *dentry),
-                                    void *context)
-{
-       __be32 *fh = (__force __be32 *)p;
-       struct gfs2_inum_host inum, parent;
-
-       memset(&parent, 0, sizeof(struct gfs2_inum));
-
-       switch (fh_len) {
-       case GFS2_LARGE_FH_SIZE:
-       case GFS2_OLD_FH_SIZE:
-               parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
-               parent.no_formal_ino |= be32_to_cpu(fh[5]);
-               parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;
-               parent.no_addr |= be32_to_cpu(fh[7]);
-       case GFS2_SMALL_FH_SIZE:
-               inum.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
-               inum.no_formal_ino |= be32_to_cpu(fh[1]);
-               inum.no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
-               inum.no_addr |= be32_to_cpu(fh[3]);
-               break;
-       default:
-               return NULL;
-       }
-
-       return gfs2_export_ops.find_exported_dentry(sb, &inum, &parent,
-                                                   acceptable, context);
-}
-
 static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
                          int connectable)
 {
@@ -189,10 +155,10 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
        return dentry;
 }
 
-static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
+static struct dentry *gfs2_get_dentry(struct super_block *sb,
+               struct gfs2_inum_host *inum)
 {
        struct gfs2_sbd *sdp = sb->s_fs_info;
-       struct gfs2_inum_host *inum = inum_obj;
        struct gfs2_holder i_gh, ri_gh, rgd_gh;
        struct gfs2_rgrpd *rgd;
        struct inode *inode;
@@ -289,11 +255,50 @@ fail:
        return ERR_PTR(error);
 }
 
+static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid,
+               int fh_len, int fh_type)
+{
+       struct gfs2_inum_host this;
+       __be32 *fh = (__force __be32 *)fid->raw;
+
+       switch (fh_type) {
+       case GFS2_SMALL_FH_SIZE:
+       case GFS2_LARGE_FH_SIZE:
+       case GFS2_OLD_FH_SIZE:
+               this.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
+               this.no_formal_ino |= be32_to_cpu(fh[1]);
+               this.no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
+               this.no_addr |= be32_to_cpu(fh[3]);
+               return gfs2_get_dentry(sb, &this);
+       default:
+               return NULL;
+       }
+}
+
+static struct dentry *gfs2_fh_to_parent(struct super_block *sb, struct fid *fid,
+               int fh_len, int fh_type)
+{
+       struct gfs2_inum_host parent;
+       __be32 *fh = (__force __be32 *)fid->raw;
+
+       switch (fh_type) {
+       case GFS2_LARGE_FH_SIZE:
+       case GFS2_OLD_FH_SIZE:
+               parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
+               parent.no_formal_ino |= be32_to_cpu(fh[5]);
+               parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;
+               parent.no_addr |= be32_to_cpu(fh[7]);
+               return gfs2_get_dentry(sb, &parent);
+       default:
+               return NULL;
+       }
+}
+
 struct export_operations gfs2_export_ops = {
-       .decode_fh = gfs2_decode_fh,
        .encode_fh = gfs2_encode_fh,
+       .fh_to_dentry = gfs2_fh_to_dentry,
+       .fh_to_parent = gfs2_fh_to_parent,
        .get_name = gfs2_get_name,
        .get_parent = gfs2_get_parent,
-       .get_dentry = gfs2_get_dentry,
 };