[PATCH] fix ->llseek() for a bunch of directories
[linux-2.6.git] / fs / 9p / vfs_dir.c
index 17089d1..e298fe1 100644 (file)
@@ -7,9 +7,8 @@
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
  *
  *  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
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 #include <linux/file.h>
 #include <linux/stat.h>
 #include <linux/string.h>
-#include <linux/smp_lock.h>
+#include <linux/sched.h>
 #include <linux/inet.h>
 #include <linux/idr.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
-#include "conv.h"
 #include "fid.h"
 
 /**
  *
  */
 
-static inline int dt_type(struct v9fs_stat *mistat)
+static inline int dt_type(struct p9_stat *mistat)
 {
        unsigned long perm = mistat->mode;
        int rettype = DT_REG;
 
-       if (perm & V9FS_DMDIR)
+       if (perm & P9_DMDIR)
                rettype = DT_DIR;
-       if (perm & V9FS_DMSYMLINK)
+       if (perm & P9_DMSYMLINK)
                rettype = DT_LNK;
 
        return rettype;
@@ -62,7 +60,7 @@ static inline int dt_type(struct v9fs_stat *mistat)
 
 /**
  * v9fs_dir_readdir - read a directory
- * @filep: opened file structure
+ * @filp: opened file structure
  * @dirent: directory structure ???
  * @filldir: function to populate directory structure ???
  *
@@ -70,112 +68,36 @@ static inline int dt_type(struct v9fs_stat *mistat)
 
 static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-       struct v9fs_fcall *fcall = NULL;
-       struct inode *inode = filp->f_dentry->d_inode;
-       struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-       struct v9fs_fid *file = filp->private_data;
-       unsigned int i, n;
-       int fid = -1;
-       int ret = 0;
-       struct v9fs_stat *mi = NULL;
-       int over = 0;
-
-       dprintk(DEBUG_VFS, "name %s\n", filp->f_dentry->d_name.name);
-
-       fid = file->fid;
-
-       mi = kmalloc(v9ses->maxdata, GFP_KERNEL);
-       if (!mi)
-               return -ENOMEM;
-
-       if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
-               kfree(file->rdir_fcall);
-               file->rdir_fcall = NULL;
-       }
-
-       if (file->rdir_fcall) {
-               n = file->rdir_fcall->params.rread.count;
-               i = file->rdir_fpos;
-               while (i < n) {
-                       int s = v9fs_deserialize_stat(v9ses,
-                                 file->rdir_fcall->params.rread.data + i,
-                                 n - i, mi, v9ses->maxdata);
-
-                       if (s == 0) {
-                               dprintk(DEBUG_ERROR,
-                                       "error while deserializing mistat\n");
-                               ret = -EIO;
-                               goto FreeStructs;
-                       }
-
-                       over = filldir(dirent, mi->name, strlen(mi->name),
-                                   filp->f_pos, v9fs_qid2ino(&mi->qid),
-                                   dt_type(mi));
-
-                       if (over) {
-                               file->rdir_fpos = i;
-                               file->rdir_pos = filp->f_pos;
-                               break;
-                       }
-
-                       i += s;
-                       filp->f_pos += s;
-               }
-
-               if (!over) {
-                       kfree(file->rdir_fcall);
-                       file->rdir_fcall = NULL;
-               }
-       }
-
-       while (!over) {
-               ret = v9fs_t_read(v9ses, fid, filp->f_pos,
-                                           v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
-               if (ret < 0) {
-                       dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
-                               ret, fcall);
-                       goto FreeStructs;
-               } else if (ret == 0)
+       int over;
+       struct p9_fid *fid;
+       struct v9fs_session_info *v9ses;
+       struct inode *inode;
+       struct p9_stat *st;
+
+       P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
+       inode = filp->f_path.dentry->d_inode;
+       v9ses = v9fs_inode2v9ses(inode);
+       fid = filp->private_data;
+       while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) {
+               if (IS_ERR(st))
+                       return PTR_ERR(st);
+
+               over = filldir(dirent, st->name.str, st->name.len, filp->f_pos,
+                       v9fs_qid2ino(&st->qid), dt_type(st));
+
+               if (over)
                        break;
 
-               n = ret;
-               i = 0;
-               while (i < n) {
-                       int s = v9fs_deserialize_stat(v9ses,
-                                 fcall->params.rread.data + i, n - i, mi,
-                                 v9ses->maxdata);
-
-                       if (s == 0) {
-                               dprintk(DEBUG_ERROR,
-                                       "error while deserializing mistat\n");
-                               return -EIO;
-                       }
-
-                       over = filldir(dirent, mi->name, strlen(mi->name),
-                                   filp->f_pos, v9fs_qid2ino(&mi->qid),
-                                   dt_type(mi));
-
-                       if (over) {
-                               file->rdir_fcall = fcall;
-                               file->rdir_fpos = i;
-                               file->rdir_pos = filp->f_pos;
-                               fcall = NULL;
-                               break;
-                       }
-
-                       i += s;
-                       filp->f_pos += s;
-               }
-
-               kfree(fcall);
+               filp->f_pos += st->size;
+               kfree(st);
+               st = NULL;
        }
 
-      FreeStructs:
-       kfree(fcall);
-       kfree(mi);
-       return ret;
+       kfree(st);
+       return 0;
 }
 
+
 /**
  * v9fs_dir_release - close a directory
  * @inode: inode of the directory
@@ -185,37 +107,19 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
 int v9fs_dir_release(struct inode *inode, struct file *filp)
 {
-       struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-       struct v9fs_fid *fid = filp->private_data;
-       int fidnum = -1;
-
-       dprintk(DEBUG_VFS, "inode: %p filp: %p fid: %d\n", inode, filp,
-               fid->fid);
-       fidnum = fid->fid;
+       struct p9_fid *fid;
 
+       fid = filp->private_data;
+       P9_DPRINTK(P9_DEBUG_VFS,
+                       "inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
        filemap_write_and_wait(inode->i_mapping);
-
-       if (fidnum >= 0) {
-               dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
-                       fid->fid);
-
-               if (v9fs_t_clunk(v9ses, fidnum, NULL))
-                       dprintk(DEBUG_ERROR, "clunk failed\n");
-
-               v9fs_put_idpool(fid->fid, &v9ses->fidpool);
-
-               kfree(fid->rdir_fcall);
-               kfree(fid);
-
-               filp->private_data = NULL;
-       }
-
-       d_drop(filp->f_dentry);
+       p9_client_clunk(fid);
        return 0;
 }
 
-struct file_operations v9fs_dir_operations = {
+const struct file_operations v9fs_dir_operations = {
        .read = generic_read_dir,
+       .llseek = generic_file_llseek,
        .readdir = v9fs_dir_readdir,
        .open = v9fs_file_open,
        .release = v9fs_dir_release,