Merge branch 'master' of /usr/src/ntfs-2.6/

1 files changed, 12 insertions, 133 deletions

diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index eda449778fa5..c4d13bf904d2 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -1,7 +1,7 @@
 /*
  * V9FS FID Management
  *
- *  Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
+ *  Copyright (C) 2005, 2006 by Eric Van Hensbergen <ericvh@gmail.com>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -40,7 +40,7 @@
  *
  */
 
-static int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
+int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
 {
         struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
         dprintk(DEBUG_9P, "fid %d (%p) dentry %s (%p)\n", fid->fid, fid,
@@ -57,7 +57,6 @@ static int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
         }
 
         fid->uid = current->uid;
-        fid->pid = current->pid;
         list_add(&fid->list, fid_list);
         return 0;
 }
@@ -68,14 +67,11 @@ static int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
  *
  */
 
-struct v9fs_fid *v9fs_fid_create(struct dentry *dentry,
-        struct v9fs_session_info *v9ses, int fid, int create)
+struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *v9ses, int fid)
 {
         struct v9fs_fid *new;
 
-        dprintk(DEBUG_9P, "fid create dentry %p, fid %d, create %d\n",
-                dentry, fid, create);
-
+        dprintk(DEBUG_9P, "fid create fid %d\n", fid);
         new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
         if (new == NULL) {
                 dprintk(DEBUG_ERROR, "Out of Memory\n");
@@ -85,19 +81,13 @@ struct v9fs_fid *v9fs_fid_create(struct dentry *dentry,
         new->fid = fid;
         new->v9ses = v9ses;
         new->fidopen = 0;
-        new->fidcreate = create;
         new->fidclunked = 0;
         new->iounit = 0;
         new->rdir_pos = 0;
         new->rdir_fcall = NULL;
+        INIT_LIST_HEAD(&new->list);
 
-        if (v9fs_fid_insert(new, dentry) == 0)
-                return new;
-        else {
-                dprintk(DEBUG_ERROR, "Problems inserting to dentry\n");
-                kfree(new);
-                return NULL;
-        }
+        return new;
 }
 
 /**
@@ -113,140 +103,29 @@ void v9fs_fid_destroy(struct v9fs_fid *fid)
 }
 
 /**
- * v9fs_fid_walk_up - walks from the process current directory
- *      up to the specified dentry.
- */
-static struct v9fs_fid *v9fs_fid_walk_up(struct dentry *dentry)
-{
-        int fidnum, cfidnum, err;
-        struct v9fs_fid *cfid;
-        struct dentry *cde;
-        struct v9fs_session_info *v9ses;
-
-        v9ses = v9fs_inode2v9ses(current->fs->pwd->d_inode);
-        cfid = v9fs_fid_lookup(current->fs->pwd);
-        if (cfid == NULL) {
-                dprintk(DEBUG_ERROR, "process cwd doesn't have a fid\n");
-                return ERR_PTR(-ENOENT);
-        }
-
-        cfidnum = cfid->fid;
-        cde = current->fs->pwd;
-        /* TODO: take advantage of multiwalk */
-
-        fidnum = v9fs_get_idpool(&v9ses->fidpool);
-        if (fidnum < 0) {
-                dprintk(DEBUG_ERROR, "could not get a new fid num\n");
-                err = -ENOENT;
-                goto clunk_fid;
-        }
-
-        while (cde != dentry) {
-                if (cde == cde->d_parent) {
-                        dprintk(DEBUG_ERROR, "can't find dentry\n");
-                        err = -ENOENT;
-                        goto clunk_fid;
-                }
-
-                err = v9fs_t_walk(v9ses, cfidnum, fidnum, "..", NULL);
-                if (err < 0) {
-                        dprintk(DEBUG_ERROR, "problem walking to parent\n");
-                        goto clunk_fid;
-                }
-
-                cfidnum = fidnum;
-                cde = cde->d_parent;
-        }
-
-        return v9fs_fid_create(dentry, v9ses, fidnum, 0);
-
-clunk_fid:
-        v9fs_t_clunk(v9ses, fidnum);
-        return ERR_PTR(err);
-}
-
-/**
  * v9fs_fid_lookup - retrieve the right fid from a  particular dentry
  * @dentry: dentry to look for fid in
  * @type: intent of lookup (operation or traversal)
  *
- * search list of fids associated with a dentry for a fid with a matching
- * thread id or uid.  If that fails, look up the dentry's parents to see if you
- * can find a matching fid.
+ * find a fid in the dentry
+ *
+ * TODO: only match fids that have the same uid as current user
  *
  */
 
 struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
 {
         struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
-        struct v9fs_fid *current_fid = NULL;
-        struct v9fs_fid *temp = NULL;
         struct v9fs_fid *return_fid = NULL;
 
         dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
 
-        if (fid_list) {
-                list_for_each_entry_safe(current_fid, temp, fid_list, list) {
-                        if (!current_fid->fidcreate) {
-                                return_fid = current_fid;
-                                break;
-                        }
-                }
-
-                if (!return_fid)
-                        return_fid = current_fid;
-        }
-
-        /* we are at the root but didn't match */
-        if ((!return_fid) && (dentry->d_parent == dentry)) {
-                /* TODO: clone attach with new uid */
-                return_fid = current_fid;
-        }
+        if (fid_list)
+                return_fid = list_entry(fid_list->next, struct v9fs_fid, list);
 
         if (!return_fid) {
-                struct dentry *par = current->fs->pwd->d_parent;
-                int count = 1;
-                while (par != NULL) {
-                        if (par == dentry)
-                                break;
-                        count++;
-                        if (par == par->d_parent) {
-                                dprintk(DEBUG_ERROR,
-                                        "got to root without finding dentry\n");
-                                break;
-                        }
-                        par = par->d_parent;
-                }
-
-/* XXX - there may be some duplication we can get rid of */
-                if (par == dentry) {
-                        return_fid = v9fs_fid_walk_up(dentry);
-                        if (IS_ERR(return_fid))
-                                return_fid = NULL;
-                }
+                dprintk(DEBUG_ERROR, "Couldn't find a fid in dentry\n");
         }
 
         return return_fid;
 }
-
-struct v9fs_fid *v9fs_fid_get_created(struct dentry *dentry)
-{
-        struct list_head *fid_list;
-        struct v9fs_fid *fid, *ftmp, *ret;
-
-        dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
-        fid_list = (struct list_head *)dentry->d_fsdata;
-        ret = NULL;
-        if (fid_list) {
-                list_for_each_entry_safe(fid, ftmp, fid_list, list) {
-                        if (fid->fidcreate && fid->pid == current->pid) {
-                                list_del(&fid->list);
-                                ret = fid;
-                                break;
-                        }
-                }
-        }
-
-        dprintk(DEBUG_9P, "return %p\n", ret);
-        return ret;
-}