From e1fcdf3f1a7a2de0289526a5481009c3380f7547 Mon Sep 17 00:00:00 2001
From: Michael Vrable <mvrable@cs.ucsd.edu>
Date: Sun, 23 Aug 2009 12:44:46 -0700
Subject: [PATCH] Basic READDIR; not much tested.

---
 bluesky.h   |  1 +
 dir.c       |  4 ++--
 nfs3/nfs3.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 nfs3/nfsd.c | 16 ++++++++++++----
 4 files changed, 68 insertions(+), 8 deletions(-)

diff --git a/bluesky.h b/bluesky.h
index 40c989b..75ba2de 100644
--- a/bluesky.h
+++ b/bluesky.h
@@ -81,6 +81,7 @@ typedef struct {
     uint64_t inum;
 } BlueSkyDirent ;
 
+BlueSkyFS *bluesky_new_fs(gchar *name);
 int64_t bluesky_get_current_time();
 uint64_t bluesky_fs_alloc_inode(BlueSkyFS *fs);
 BlueSkyInode *bluesky_new_inode(uint64_t inum, BlueSkyFileType type);
diff --git a/dir.c b/dir.c
index eab71be..f8aef94 100644
--- a/dir.c
+++ b/dir.c
@@ -43,8 +43,8 @@ void bluesky_dirent_destroy(gpointer data)
     g_free(dirent);
 }
 
-static gint bluesky_dirent_compare(gconstpointer a, gconstpointer b,
-                                   gpointer unused)
+gint bluesky_dirent_compare(gconstpointer a, gconstpointer b,
+                            gpointer unused)
 {
     /* We can't simply subtract the hash values, since they are 64-bit and the
      * result could overflow when converted to a gint. */
diff --git a/nfs3/nfs3.c b/nfs3/nfs3.c
index 242875f..f13a6f2 100644
--- a/nfs3/nfs3.c
+++ b/nfs3/nfs3.c
@@ -149,7 +149,17 @@ nfsproc3_access_3_svc(access3args *argp, struct svc_req *rqstp)
 {
     static access3res result;
 
-    result.status = NFS3ERR_NOTSUPP;
+    BlueSkyInode *inode = lookup_fh(&argp->object);
+    if (inode == NULL) {
+        result.status = NFS3ERR_STALE;
+        result.access3res_u.resfail.present = FALSE;
+        return &result;
+    }
+
+    result.status = NFS3_OK;
+    result.access3res_u.resok.obj_attributes.present = TRUE;
+    encode_fattr3(&result.access3res_u.resok.obj_attributes.post_op_attr_u.attributes, inode);
+    result.access3res_u.resok.access = argp->access;
 
     return &result;
 }
@@ -264,12 +274,53 @@ nfsproc3_link_3_svc(link3args *argp, struct svc_req *rqstp)
     return &result;
 }
 
+gint bluesky_dirent_compare(gconstpointer a, gconstpointer b,
+                            gpointer unused);
+
 readdir3res *
 nfsproc3_readdir_3_svc(readdir3args *argp, struct svc_req *rqstp)
 {
     static readdir3res result;
 
-    result.status = NFS3ERR_NOTSUPP;
+    BlueSkyInode *dir = lookup_fh(&argp->dir);
+    if (dir == NULL) {
+        result.status = NFS3ERR_STALE;
+        result.readdir3res_u.resfail.present = FALSE;
+        return &result;
+    }
+
+    result.status = NFS3_OK;
+    result.readdir3res_u.resok.dir_attributes.present = TRUE;
+    encode_fattr3(&result.readdir3res_u.resok.dir_attributes.post_op_attr_u.attributes, dir);
+    memset(result.readdir3res_u.resok.cookieverf, 0,
+           sizeof(result.readdir3res_u.resok.cookieverf));
+
+#define MAX_READDIR_DIRENTS 4
+    static entry3 dirents[MAX_READDIR_DIRENTS];
+    int count = 0;
+
+    BlueSkyDirent start = {NULL, argp->cookie, 0};
+    GSequenceIter *i = g_sequence_search(dir->dirents, &start,
+                                         bluesky_dirent_compare, NULL);
+
+    while (count < MAX_READDIR_DIRENTS && !g_sequence_iter_is_end(i)) {
+        BlueSkyDirent *d = g_sequence_get(i);
+        dirents[count].fileid = d->inum;
+        dirents[count].name = d->name;
+        dirents[count].cookie = d->hash;
+        dirents[count].nextentry = NULL;
+        if (count > 0)
+            dirents[count - 1].nextentry = &dirents[count];
+        i = g_sequence_iter_next(i);
+        count++;
+        printf("readdir: %s %lld\n", d->name, d->inum);
+    }
+
+    if (count > 0)
+        result.readdir3res_u.resok.reply.entries = &dirents[0];
+    else
+        result.readdir3res_u.resok.reply.entries = NULL;
+    result.readdir3res_u.resok.reply.eof = g_sequence_iter_is_end(i);
 
     return &result;
 }
diff --git a/nfs3/nfsd.c b/nfs3/nfsd.c
index 03b39fb..abd1050 100644
--- a/nfs3/nfsd.c
+++ b/nfs3/nfsd.c
@@ -30,14 +30,22 @@ int main(int argc, char *argv[])
     g_thread_init(NULL);
     register_rpc();
 
+    fs = bluesky_new_fs("export");
+
     BlueSkyInode *root;
     root = bluesky_new_inode(BLUESKY_ROOT_INUM, BLUESKY_DIRECTORY);
     root->nlink = 1;
     root->mode = 0755;
     bluesky_insert_inode(fs, root);
 
-    svc_run ();
-    fprintf (stderr, "%s", "svc_run returned");
-    exit (1);
-    /* NOTREACHED */
+    BlueSkyInode *file;
+    file = bluesky_new_inode(bluesky_fs_alloc_inode(fs), BLUESKY_REGULAR);
+    file->nlink = 1;
+    file->mode = 0755;
+    bluesky_insert_inode(fs, file);
+    bluesky_directory_insert(root, "demo", file->inum);
+
+    svc_run();
+    fprintf(stderr, "%s", "svc_run returned");
+    exit(1);
 }
-- 
2.20.1