Whamcloud - gitweb
b=6274
[fs/lustre-release.git] / lustre / smfs / dir.c
index 3583f7b..6be2ddd 100644 (file)
@@ -1,7 +1,26 @@
-/*
- * dir.c
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ *  Copyright (C) 2004 Cluster File Systems, Inc.
+ *
+ *   This file is part of Lustre, http://www.lustre.org.
+ *
+ *   Lustre is free software; you can redistribute it and/or
+ *   modify it under the terms of version 2 of the GNU General Public
+ *   License as published by the Free Software Foundation.
+ *
+ *   Lustre is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Lustre; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
  */
-#define DEBUG_SUBSYSTEM S_SNAP
+
+#define DEBUG_SUBSYSTEM S_SM
 
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/unistd.h>
+#include <linux/smp_lock.h>
+#include <linux/obd_class.h>
+#include <linux/obd_support.h>
+#include <linux/lustre_lib.h>
+#include <linux/lustre_idl.h>
+#include <linux/lustre_fsfilt.h>
+#include <linux/lustre_smfs.h>
+#include <linux/lustre_snap.h>
+#include <linux/security.h>
+#include "smfs_internal.h"
 
-#include "smfs_internal.h" 
+//#define NAME_ALLOC_LEN(len)     ((len+16) & ~15)
 
-static void d_unalloc(struct dentry *dentry)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int smfs_create(struct inode *dir, struct dentry *dentry,
+                       int mode)
+#else
+static int smfs_create(struct inode *dir, struct dentry *dentry,
+                       int mode, struct nameidata *nd)
+#endif
 {
-        if (dentry) {                                                                                                                                                                                
-               list_del(&dentry->d_hash);
-               INIT_LIST_HEAD(&dentry->d_hash);
-               dput(dentry);   
+        struct inode *inode = NULL;
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct inode *cache_dir = I2CI(dir);
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void *handle = NULL;
+        struct hook_msg msg = {
+                .dentry = dentry,
+        };
+        int rc = 0;
+        
+        ENTRY;
+
+        LASSERT(cache_dir);
+        LASSERT(cache_dir->i_op->create);
+
+        //lock_kernel();
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+        if (!cache_dentry || !cache_parent) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+       
+        handle = smfs_trans_start(dir, FSFILT_OP_CREATE, NULL);
+        if (IS_ERR(handle)) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+        
+        SMFS_PRE_HOOK(dir, HOOK_CREATE, &msg);
+
+        pre_smfs_inode(dir, cache_dir);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+        rc = cache_dir->i_op->create(cache_dir, cache_dentry, mode);
+#else
+        rc = cache_dir->i_op->create(cache_dir, cache_dentry, mode, nd);
+#endif
+        if (!rc) {
+                inode = smfs_get_inode(dir->i_sb, cache_dentry->d_inode->i_ino,
+                                       dir, 0);
+                if (inode) {
+                        d_instantiate(dentry, inode);
+                }
+                else
+                        rc = -ENOENT;
+        }
+        
+        SMFS_POST_HOOK(dir, HOOK_CREATE, &msg, rc); 
+
+        post_smfs_inode(dir, cache_dir);
+        smfs_trans_commit(dir, handle, 0);
+
+exit:
+        //unlock_kernel();
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        RETURN(rc);
+}
+
+static struct dentry * iopen_connect_dentry(struct dentry * dentry,
+                                     struct inode *inode, int rehash)
+{
+       struct dentry *tmp, *goal = NULL;
+       struct list_head *lp;
+
+       /* verify this dentry is really new */
+       LASSERT(dentry->d_inode == NULL);
+       LASSERT(list_empty(&dentry->d_alias));          /* d_instantiate */
+       if (rehash)
+               LASSERT(d_unhashed(dentry));    /* d_rehash */
+       LASSERT(list_empty(&dentry->d_subdirs));
+
+       spin_lock(&dcache_lock);
+       if (!inode)
+               goto do_rehash;
+
+       /* preferrably return a connected dentry */
+       list_for_each(lp, &inode->i_dentry) {
+               tmp = list_entry(lp, struct dentry, d_alias);
+               if (tmp->d_flags & DCACHE_DISCONNECTED) {
+                       LASSERT(tmp->d_alias.next == &inode->i_dentry);
+                       LASSERT(tmp->d_alias.prev == &inode->i_dentry);
+                       goal = tmp;
+                       dget_locked(goal);
+                       break;
+               }
        }
+
+       if (!goal)
+               goto do_instantiate;
+
+       /* Move the goal to the de hash queue */
+       goal->d_flags &= ~ DCACHE_DISCONNECTED;
+       security_d_instantiate(goal, inode);
+        __d_rehash(dentry);
+        __d_move(goal, dentry);
+       spin_unlock(&dcache_lock);
+       iput(inode);
+
+       RETURN(goal);
+
+       /* d_add(), but don't drop dcache_lock before adding dentry to inode */
+do_instantiate:
+       list_add(&dentry->d_alias, &inode->i_dentry);   /* d_instantiate */
+       dentry->d_inode = inode;
+do_rehash:
+       if (rehash)
+                __d_rehash(dentry);
+       spin_unlock(&dcache_lock);
+
+       RETURN(NULL);
+
 }
-static struct inode *sm_create_inode(struct super_block *sb,
-                                    struct inode *cache_inode) 
+
+static int smfs_do_lookup (struct inode * dir, 
+                           struct dentry * dentry,
+                           struct nameidata *nd,
+                           struct inode **inode)
 {
-       struct inode *inode;
-
-       inode = new_inode(sb);
-       if (inode) {
-               /*FIXME there are still some 
-                * other attributes need to
-                * duplicated*/
-               inode->i_ino = cache_inode->i_ino;                      
-               inode->i_mode = cache_inode->i_mode;                    
-       }       
-       
-       return inode;
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        struct dentry *rdentry = NULL, *tmp = NULL;
+        int rc = 0;
+        struct hook_msg msg = {
+                .dentry = dentry,
+        };
+
+        ENTRY;
+        
+        cache_dir = I2CI(dir);
+        if (!cache_dir)
+                RETURN(-ENOENT);
+
+        LASSERT(cache_dir->i_op->lookup);
+
+        /* preparing artificial backing fs dentries. */
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+        if (!cache_dentry || !cache_parent) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+        
+        SMFS_PRE_HOOK(dir, HOOK_LOOKUP, &msg);
+        
+        /* perform lookup in backing fs. */
+        rdentry = cache_dir->i_op->lookup(cache_dir, cache_dentry, nd);
+        if (rdentry) {
+                if (IS_ERR(rdentry)) {
+                        rc = PTR_ERR(rdentry);
+                        rdentry = NULL;
+                }
+                else {
+                        tmp = rdentry;
+                        //copy fields if DCACHE_CROSS_REF
+                        smfs_update_dentry(dentry, tmp);
+                }
+        } else 
+                tmp = cache_dentry;
+        
+        SMFS_POST_HOOK(dir, HOOK_LOOKUP, &msg, rc);
+     
+        if (tmp && tmp->d_inode) {
+                *inode = smfs_get_inode(dir->i_sb, tmp->d_inode->i_ino, 
+                                        dir, 0); 
+                if (!(*inode))
+                        rc = -ENOENT;
+        }
+        
+        if (rdentry) {
+                LASSERT(atomic_read(&rdentry->d_count) > 0);
+                dput(rdentry);
+        }
+        
+exit:
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        
+        RETURN(rc);
 }
-                                                                                                                                                                                                     
-static void prepare_parent_dentry(struct dentry *dentry, struct inode *inode)
+
+static struct dentry * smfs_iopen_lookup(struct inode * dir, 
+                                         struct dentry *dentry,
+                                        struct nameidata *nd)
 {
-        atomic_set(&dentry->d_count, 1);
-        dentry->d_vfs_flags = 0;
-        dentry->d_flags = 0;
-        dentry->d_inode = inode;
-        dentry->d_op = NULL;
-        dentry->d_fsdata = NULL;
-        dentry->d_mounted = 0;
-        INIT_LIST_HEAD(&dentry->d_hash);
-        INIT_LIST_HEAD(&dentry->d_lru);
-        INIT_LIST_HEAD(&dentry->d_subdirs);
-        INIT_LIST_HEAD(&dentry->d_alias);
+        struct dentry * alternate = NULL;
+       struct inode *inode = NULL;
+        int rc = 0;
+        ENTRY;
+        
+        rc = smfs_do_lookup(dir, dentry, nd, &inode);
+       if (rc)
+                RETURN(ERR_PTR(rc));
+        
+        LASSERT(inode);
+        /* preferrably return a connected dentry */
+       spin_lock(&dcache_lock);
+       list_for_each_entry(alternate, &inode->i_dentry, d_alias) {
+               LASSERT(!(alternate->d_flags & DCACHE_DISCONNECTED));
+       }
+
+       list_for_each_entry(alternate, &inode->i_dentry, d_alias) {
+               dget_locked(alternate);
+               spin_lock(&alternate->d_lock);
+               alternate->d_flags |= DCACHE_REFERENCED;
+               spin_unlock(&alternate->d_lock);
+               iput(inode);
+               spin_unlock(&dcache_lock);
+               RETURN(alternate);
+       }
+        
+       dentry->d_flags |= DCACHE_DISCONNECTED;
+
+       /* d_add(), but don't drop dcache_lock before adding dentry to inode */
+       list_add(&dentry->d_alias, &inode->i_dentry);   /* d_instantiate */
+       dentry->d_inode = inode;
+
+       __d_rehash(dentry);                             /* d_rehash */
+       spin_unlock(&dcache_lock);
+
+       return NULL;
+}
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static struct dentry *smfs_lookup(struct inode *dir, struct dentry *dentry)
+#else
+static struct dentry *smfs_lookup(struct inode *dir, struct dentry *dentry,
+                                  struct nameidata *nd)
+#endif
+{
+        struct dentry * rdentry = NULL;
+        struct inode * inode = NULL;
+        int rc;
+        
+        rc = smfs_do_lookup(dir, dentry, nd, &inode);
+        if (rc)
+                RETURN(ERR_PTR(rc));
+        
+        //lmv stuff. Special dentry that has no inode.
+        if (dentry->d_flags & DCACHE_CROSS_REF) {
+                d_add(dentry, NULL);
+                RETURN(NULL);
+        }
+        //TODO: should flags be checked and copied before?        
+        rdentry = iopen_connect_dentry(dentry, inode, 1);
+        
+        RETURN(rdentry);
 }
 
-static int smfs_create(struct inode *dir, 
-                      struct dentry *dentry, 
-                      int mode)
+static int smfs_link(struct dentry *old_dentry,
+                     struct inode *dir, struct dentry *dentry)
 {
-       struct  inode *cache_dir; 
-       struct  inode *cache_inode, *inode;
-       struct  dentry tmp; 
-       struct  dentry *cache_dentry;
-       int     rc;
-       
-       ENTRY;
-       
-       cache_dir = I2CI(dir);
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *old_inode = old_dentry->d_inode;
+        struct inode *cache_old_inode = I2CI(old_inode);
+        struct dentry *cache_old_dentry = NULL;
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void *handle = NULL;
+        int rc = 0;
+        struct hook_link_msg msg = {
+                .dentry = old_dentry,
+                .new_dentry = dentry
+        };
+
+        ENTRY;
+
         if (!cache_dir)
                 RETURN(-ENOENT);
-       
-       prepare_parent_dentry(&tmp, cache_dir);      
-       cache_dentry = d_alloc(&tmp, &dentry->d_name);
         
-       if (!cache_dentry) 
+        if (!cache_old_inode)
                 RETURN(-ENOENT);
-       
-       if(cache_dir && cache_dir->i_op->create)
-               rc = cache_dir->i_op->create(cache_dir, cache_dentry, mode);
-       if (rc)
-               GOTO(exit, rc);
+        
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+        cache_old_dentry = pre_smfs_dentry(NULL, cache_old_inode, old_dentry);
+        if (!cache_old_dentry || !cache_dentry || !cache_parent) {
+                rc = -ENOMEM;
+                goto exit;
+        }        
+        
+        handle = smfs_trans_start(dir, FSFILT_OP_LINK, NULL);
+        if (IS_ERR(handle)) {
+                 rc = -ENOSPC;
+                 goto exit;
+        }
+
+        pre_smfs_inode(dir, cache_dir);
+        pre_smfs_inode(old_inode, cache_old_inode);
+
+        //lock_kernel();
+        SMFS_PRE_HOOK(dir, HOOK_LINK, &msg); 
+
+        rc = cache_dir->i_op->link(cache_old_dentry, cache_dir, cache_dentry);
+        if (!rc) {
+                atomic_inc(&old_inode->i_count);
+                dput(iopen_connect_dentry(dentry, old_inode, 0));
+        }
+
+        SMFS_POST_HOOK(dir, HOOK_LINK, &msg, rc); 
+        
+        post_smfs_inode(old_inode, cache_old_inode);
+        post_smfs_inode(dir, cache_dir);
+
+        smfs_trans_commit(dir, handle, 0);
+        
+exit:
+        //unlock_kernel();
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        post_smfs_dentry(cache_old_dentry);
+        
+        RETURN(rc);
+}
+
+static int smfs_unlink(struct inode * dir, struct dentry *dentry)
+{
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *cache_inode = I2CI(dentry->d_inode);
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void   *handle = NULL;
+        int    rc = 0;
+        //int    mode = 0;
+        struct hook_unlink_msg msg = {
+                .dentry = dentry,
+                .mode = 0
+        };
+
+        ENTRY;
+        
+        LASSERT(cache_dir);
+        LASSERT(cache_inode);
+        LASSERT(cache_dir->i_op->unlink);
+        LASSERT(parent);
+        
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, cache_inode, dentry);
+        if (!cache_dentry || !cache_parent) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+                
+        //lock_kernel();
+        handle = smfs_trans_start(dir, FSFILT_OP_UNLINK, NULL);
+        if (IS_ERR(handle)) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+
+        pre_smfs_inode(dir, cache_dir);
+        pre_smfs_inode(dentry->d_inode, cache_inode);
+
+        SMFS_PRE_HOOK(dir, HOOK_UNLINK, &msg); 
+        
+        rc = cache_dir->i_op->unlink(cache_dir, cache_dentry);
+                
+        SMFS_POST_HOOK(dir, HOOK_UNLINK, &msg, rc); 
+
+        post_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+        post_smfs_inode(dir, cache_dir);
+        //unlock_kernel();
+        
+        smfs_trans_commit(dir, handle, 0);
+exit:
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        RETURN(rc);
+}
+
+static int smfs_symlink(struct inode *dir, struct dentry *dentry,
+                        const char *symname)
+{
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *inode = NULL;
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void   *handle = NULL;
+        int    rc = 0;
+        struct hook_symlink_msg msg = {
+                .dentry = dentry,
+                .tgt_len = strlen(symname) + 1,
+                .symname = (char*)symname
+        };
+
+        ENTRY;
+        
+        LASSERT(cache_dir);
+        LASSERT(cache_dir->i_op->symlink);
+        LASSERT(parent);
+
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+        if (!cache_parent || !cache_dentry) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+       
+        handle = smfs_trans_start(dir, FSFILT_OP_SYMLINK, NULL);
+        if (IS_ERR(handle)) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+        
+        //lock_kernel();
+        pre_smfs_inode(dir, cache_dir);
+
+        SMFS_PRE_HOOK(dir, HOOK_SYMLINK, &msg); 
+        
+        rc = cache_dir->i_op->symlink(cache_dir, cache_dentry, symname);
+        if (!rc) {        
+                inode = smfs_get_inode(dir->i_sb, cache_dentry->d_inode->i_ino,
+                                       dir, 0);
+                if (inode) {
+                        //smfs_update_dentry(dentry, cache_dentry);
+                        d_instantiate(dentry, inode);
+                }
+                else
+                        rc = -ENOENT;
+        }
+        
+        SMFS_POST_HOOK(dir, HOOK_SYMLINK, &msg, rc);
+        
+        post_smfs_inode(dir, cache_dir);
+        smfs_trans_commit(dir, handle, 0);
+
+exit:
+        //unlock_kernel();
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        RETURN(rc);
+}
+
+static int smfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct inode *inode = NULL;
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void   *handle = NULL;
+        int    rc = 0;
+        struct hook_msg msg = {
+                .dentry = dentry,
+        };
+
+        ENTRY;
+        
+        LASSERT(cache_dir);
+        LASSERT(parent);
+        
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+        if (!cache_parent || !cache_dentry) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+
+        handle = smfs_trans_start(dir, FSFILT_OP_MKDIR, NULL);
+        if (IS_ERR(handle)) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+        
+        pre_smfs_inode(dir, cache_dir);
+        SMFS_PRE_HOOK(dir, HOOK_MKDIR, &msg); 
+        
+        rc = cache_dir->i_op->mkdir(cache_dir, cache_dentry, mode);
+        if (!rc) {
+                inode = smfs_get_inode(dir->i_sb, cache_dentry->d_inode->i_ino,
+                                       dir, 0);
+                if (inode) {
+                        //smsf_update_dentry(dentry, cache_dentry);
+                        d_instantiate(dentry, inode);
+                }
+                else
+                        rc = -ENOENT;
+        }
+
+        SMFS_POST_HOOK(dir, HOOK_MKDIR, &msg, rc); 
+        post_smfs_inode(dir, cache_dir);
+        smfs_trans_commit(dir, handle, 0);
+
+exit:
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        RETURN(rc);
+}
+
+static int smfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *cache_inode = I2CI(dentry->d_inode);
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void *handle = NULL;
+        int    rc = 0;
+        struct hook_unlink_msg msg = {
+                .dentry = dentry,
+                .mode = S_IFDIR
+        };
+
+        ENTRY;
+        
+        LASSERT(cache_dir);
+        LASSERT(cache_dir->i_op->rmdir);
+        LASSERT(parent);
+
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, cache_inode, dentry);
+        if (!cache_parent || !cache_dentry) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+
+        handle = smfs_trans_start(dir, FSFILT_OP_RMDIR, NULL);
+        if (IS_ERR(handle) ) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+
+        pre_smfs_inode(dir, cache_dir);
+        pre_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+        
+        SMFS_PRE_HOOK(dir, HOOK_RMDIR, &msg); 
+        
+        rc = cache_dir->i_op->rmdir(cache_dir, cache_dentry);
+              
+        SMFS_POST_HOOK(dir, HOOK_RMDIR, &msg, rc); 
+        
+        post_smfs_inode(dir, cache_dir);
+        post_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+        //like vfs_rmdir is doing with inode
+        if (!rc)
+                cache_dentry->d_inode->i_flags |= S_DEAD;
+        
+        smfs_trans_commit(dir, handle, 0);
+
+exit:
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        RETURN(rc);
+}
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int smfs_mknod(struct inode *dir, struct dentry *dentry,
+                      int mode, int rdev)
+#else
+static int smfs_mknod(struct inode *dir, struct dentry *dentry,
+                      int mode, dev_t rdev)
+#endif
+{
+        struct inode *cache_dir = I2CI(dir);
+        struct inode *inode = NULL;
+        struct inode *parent = I2CI(dentry->d_parent->d_inode);
+        struct dentry *cache_dentry = NULL;
+        struct dentry *cache_parent = NULL;
+        void *handle = NULL;
+        int rc = 0;
+        struct hook_msg msg = {
+                .dentry = dentry,
+        };
  
-       cache_inode = cache_dentry->d_inode;
-       inode = sm_create_inode(dir->i_sb, cache_inode);        
-       
-       if (!inode) 
-               GOTO(exit, rc);         
-       
-       sm_set_inode_ops(cache_inode, inode);
+        ENTRY;
+        
+        LASSERT(parent);
+        LASSERT(cache_dir);
+        LASSERT(cache_dir->i_op->mknod);
+
+        cache_parent = pre_smfs_dentry(NULL, parent, dentry->d_parent);
+        cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+        if (!cache_parent || !cache_dentry) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+
+        handle = smfs_trans_start(dir, FSFILT_OP_MKNOD, NULL);
+        if (IS_ERR(handle)) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+        
+        pre_smfs_inode(dir, cache_dir);
+        
+        SMFS_PRE_HOOK(dir, HOOK_MKNOD, &msg); 
+        
+        rc = cache_dir->i_op->mknod(cache_dir, cache_dentry, mode, rdev);
+        if (!rc) {
+                inode = smfs_get_inode(dir->i_sb, cache_dentry->d_inode->i_ino,
+                                       dir, 0);
+                if (inode) {
+                        //smsf_update_dentry(dentry, cache_dentry);
+                        d_instantiate(dentry, inode);
+                }
+                else
+                        rc = -ENOENT;
+        }
+
+        SMFS_POST_HOOK(dir, HOOK_MKNOD, &msg, rc); 
+        
+        post_smfs_inode(dir, cache_dir);
+        
+        smfs_trans_commit(dir, handle, 0);
+
+exit:
+        post_smfs_dentry(cache_dentry);
+        post_smfs_dentry(cache_parent);
+        RETURN(rc);
+}
+
+static int smfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+                       struct inode *new_dir,struct dentry *new_dentry)
+{
+        struct inode *cache_old_dir = I2CI(old_dir);
+        struct inode *cache_new_dir = I2CI(new_dir);
+        struct inode *cache_old_inode = I2CI(old_dentry->d_inode);
+        struct inode *old_parent = I2CI(old_dentry->d_parent->d_inode);
+        struct inode *new_parent = I2CI(new_dentry->d_parent->d_inode);
+        struct inode *cache_new_inode = NULL;
+        struct dentry *cache_old_dentry = NULL;
+        struct dentry *cache_new_dentry = NULL;
+        struct dentry *cache_new_parent = NULL;
+        struct dentry *cache_old_parent = NULL;
+        void *handle = NULL;
+        int    rc = 0;
+        struct hook_rename_msg msg = {
+                .dentry = old_dentry,
+                .new_dir = new_dir,
+                .new_dentry = new_dentry
+        };
+
+        ENTRY;
+                
+        if (!cache_old_dir || !cache_new_dir || !cache_old_inode)
+                RETURN(-ENOENT);
+
+        if (new_dentry->d_inode) {
+                cache_new_inode = I2CI(new_dentry->d_inode);
+                if (!cache_new_inode)
+                        RETURN(-ENOENT);
+        }
+        
+        cache_old_parent = pre_smfs_dentry(NULL, old_parent, old_dentry->d_parent);
+        cache_old_dentry = pre_smfs_dentry(cache_old_parent, cache_old_inode,
+                                           old_dentry);
+        if (!cache_old_parent || !cache_old_dentry) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+        
+        cache_new_parent = pre_smfs_dentry(NULL, new_parent, new_dentry->d_parent);
+        cache_new_dentry = pre_smfs_dentry(cache_new_parent, cache_new_inode,
+                                           new_dentry);
+        if (!cache_new_parent || !cache_new_dentry) {
+                rc = -ENOMEM;
+                goto exit;
+        }
+
+        handle = smfs_trans_start(old_dir, FSFILT_OP_RENAME, NULL);
+        if (IS_ERR(handle)) {
+                rc = -ENOSPC;
+                goto exit;
+        }
+        
+        pre_smfs_inode(old_dir, cache_old_dir);
+        pre_smfs_inode(new_dir, cache_new_dir);
+        if (new_dentry->d_inode)
+                pre_smfs_inode(new_dentry->d_inode, cache_new_dentry->d_inode);
+
+        SMFS_PRE_HOOK(old_dir, HOOK_RENAME, &msg); 
+        
+        rc = cache_old_dir->i_op->rename(cache_old_dir, cache_old_dentry,
+                                         cache_new_dir, cache_new_dentry);
+        
+        SMFS_POST_HOOK(old_dir, HOOK_RENAME, &msg, rc); 
+
+        post_smfs_inode(old_dir, cache_old_dir);
+        post_smfs_inode(new_dir, cache_new_dir);
+        if (new_dentry->d_inode)
+                post_smfs_inode(new_dentry->d_inode, cache_new_dentry->d_inode);
+        
+        smfs_trans_commit(old_dir, handle, 0);
+        
 exit:
-       d_unalloc(cache_dentry);        
-       RETURN(rc);
+        post_smfs_dentry(cache_old_dentry);
+        post_smfs_dentry(cache_old_parent);
+        post_smfs_dentry(cache_new_dentry);
+        post_smfs_dentry(cache_new_parent);
+        RETURN(rc);
 }
 
-struct inode_operations smfs_dir_fops = {
-       create: smfs_create,
+struct inode_operations smfs_dir_iops = {
+        create:         smfs_create,
+        lookup:         smfs_lookup,
+        link:           smfs_link,              /* BKL held */
+        unlink:         smfs_unlink,            /* BKL held */
+        symlink:        smfs_symlink,           /* BKL held */
+        mkdir:          smfs_mkdir,             /* BKL held */
+        rmdir:          smfs_rmdir,             /* BKL held */
+        mknod:          smfs_mknod,             /* BKL held */
+        rename:         smfs_rename,            /* BKL held */
+        setxattr:       smfs_setxattr,          /* BKL held */
+        getxattr:       smfs_getxattr,          /* BKL held */
+        listxattr:      smfs_listxattr,         /* BKL held */
+        removexattr:    smfs_removexattr,       /* BKL held */
+};
+
+struct inode_operations smfs_iopen_iops = {
+        lookup:         smfs_iopen_lookup,
+};
+
+static ssize_t smfs_read_dir(struct file *filp, char *buf,
+                             size_t size, loff_t *ppos)
+{
+        struct dentry *dentry = filp->f_dentry;
+        struct inode *cache_inode = NULL;
+        struct smfs_file_info *sfi = NULL;
+        loff_t tmp_ppos;
+        loff_t *cache_ppos = NULL;
+        int    rc = 0;
+
+        ENTRY;
+        
+        cache_inode = I2CI(dentry->d_inode);
+
+        if (!cache_inode || !cache_inode->i_fop->read)
+                RETURN(-EINVAL);
+
+        sfi = F2SMFI(filp);
+        if (sfi->magic != SMFS_FILE_MAGIC)
+                BUG();
+
+        if (ppos != &(filp->f_pos))
+                cache_ppos = &tmp_ppos;
+        else
+                cache_ppos = &sfi->c_file->f_pos;
+        
+        *cache_ppos = *ppos;
+
+        rc = cache_inode->i_fop->read(sfi->c_file, buf, size, cache_ppos);
+        if (rc)
+                RETURN(rc);
+
+        *ppos = *cache_ppos;
+        
+        duplicate_file(filp, sfi->c_file);
+        
+        RETURN(rc);
+}
+
+static int smfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+        struct dentry *dentry = filp->f_dentry;
+        struct inode *cache_inode = NULL;
+        struct smfs_file_info *sfi = NULL;
+        int    rc = 0;
+        struct hook_readdir_msg msg = {
+                .dentry = dentry,
+                .filp = filp,
+                .dirent = dirent,
+                .filldir = filldir
+        };
+
+        ENTRY;
+        
+        cache_inode = I2CI(dentry->d_inode);
+        if (!cache_inode || !cache_inode->i_fop->readdir)
+                RETURN(-EINVAL);
+
+        sfi = F2SMFI(filp);
+        if (sfi->magic != SMFS_FILE_MAGIC) BUG();
+
+        SMFS_PRE_HOOK(dentry->d_inode, HOOK_READDIR, &msg); 
+        
+        rc = cache_inode->i_fop->readdir(sfi->c_file, dirent, filldir);
+        
+        SMFS_POST_HOOK(dentry->d_inode, HOOK_READDIR, &msg, rc);
+        duplicate_file(filp, sfi->c_file);
+
+        RETURN(rc);
+}
+
+struct file_operations smfs_dir_fops = {
+        .read           = smfs_read_dir,
+        .readdir        = smfs_readdir,       /* BKL held */
+        .ioctl          = smfs_ioctl,         /* BKL held */
+        .fsync          = smfs_fsync,         /* BKL held */
+        .open           = smfs_open,
+        .release        = smfs_release,
+};
+
+struct file_operations smfs_iopen_fops = {
+        .read           = smfs_read_dir,
 };