From 701322d0e64a6530e6263aaf8e852e6171c65de5 Mon Sep 17 00:00:00 2001
From: tappro <tappro>
Date: Mon, 16 May 2005 18:33:01 +0000
Subject: [PATCH] b=5881, 6274 r=alex

-fix bug with setting i_ino (thanks alex)
-fix issue with non-freed dentry after error
-cleanup smfs_do_lookup() code
---
 lustre/smfs/dir.c   | 56 +++++++++++++++++++++++++++++------------------------
 lustre/smfs/inode.c | 19 ++++++++++--------
 2 files changed, 42 insertions(+), 33 deletions(-)

diff --git a/lustre/smfs/dir.c b/lustre/smfs/dir.c
index 3d01e5a..6be2ddd 100644
--- a/lustre/smfs/dir.c
+++ b/lustre/smfs/dir.c
@@ -166,15 +166,15 @@ do_rehash:
 }
 
 static int smfs_do_lookup (struct inode * dir, 
-                                      struct dentry * dentry,
-                                      struct nameidata *nd,
-                                      struct inode **inode, int * flags)
+                           struct dentry * dentry,
+                           struct nameidata *nd,
+                           struct inode **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;
+        struct dentry *rdentry = NULL, *tmp = NULL;
         int rc = 0;
         struct hook_msg msg = {
                 .dentry = dentry,
@@ -191,35 +191,43 @@ static int smfs_do_lookup (struct inode * dir,
         /* 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) 
-                RETURN(-ENOMEM);
+        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))
+                if (IS_ERR(rdentry)) {
                         rc = PTR_ERR(rdentry);
-        } else {
-                rdentry = dget(cache_dentry);
-        }
+                        rdentry = NULL;
+                }
+                else {
+                        tmp = rdentry;
+                        //copy fields if DCACHE_CROSS_REF
+                        smfs_update_dentry(dentry, tmp);
+                }
+        } else 
+                tmp = cache_dentry;
         
-        if (!rc && rdentry->d_inode) {
-                *inode = smfs_get_inode(dir->i_sb, rdentry->d_inode->i_ino, 
-                                       dir, 0);
-                if (!(*inode)) {
+        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;
-                }
         }
-
-        SMFS_POST_HOOK(dir, HOOK_LOOKUP, &msg, rc);
         
-        if (!rc) {
-                smfs_update_dentry(dentry, rdentry);
-                *flags = rdentry->d_flags;
+        if (rdentry) {
+                LASSERT(atomic_read(&rdentry->d_count) > 0);
                 dput(rdentry);
         }
+        
+exit:
         post_smfs_dentry(cache_dentry);
         post_smfs_dentry(cache_parent);
         
@@ -232,11 +240,10 @@ static struct dentry * smfs_iopen_lookup(struct inode * dir,
 {
         struct dentry * alternate = NULL;
 	struct inode *inode = NULL;
-        int flags = 0;
         int rc = 0;
         ENTRY;
         
-        rc = smfs_do_lookup(dir, dentry, nd, &inode, &flags);
+        rc = smfs_do_lookup(dir, dentry, nd, &inode);
 	if (rc)
                 RETURN(ERR_PTR(rc));
         
@@ -278,15 +285,14 @@ static struct dentry *smfs_lookup(struct inode *dir, struct dentry *dentry,
 {
         struct dentry * rdentry = NULL;
         struct inode * inode = NULL;
-        int flags = 0;
         int rc;
         
-        rc = smfs_do_lookup(dir, dentry, nd, &inode, &flags);
+        rc = smfs_do_lookup(dir, dentry, nd, &inode);
         if (rc)
                 RETURN(ERR_PTR(rc));
         
         //lmv stuff. Special dentry that has no inode.
-        if (flags & DCACHE_CROSS_REF) {
+        if (dentry->d_flags & DCACHE_CROSS_REF) {
                 d_add(dentry, NULL);
                 RETURN(NULL);
         }
diff --git a/lustre/smfs/inode.c b/lustre/smfs/inode.c
index 857a9e6..f31852d 100644
--- a/lustre/smfs/inode.c
+++ b/lustre/smfs/inode.c
@@ -48,7 +48,7 @@ static void smfs_init_inode_info(struct inode *inode, void *opaque)
 
                 /* getting backing fs inode. */
                 LASSERT(sargs);
-                ino = sargs ? sargs->s_ino : inode->i_ino;
+                ino = inode->i_ino;
                 cache_inode = iget(S2CSB(inode->i_sb), ino); 
                 
                 OBD_ALLOC(inode->u.generic_ip,
@@ -68,11 +68,10 @@ static void smfs_init_inode_info(struct inode *inode, void *opaque)
                         inode->i_op = &smfs_iopen_iops;
                         inode->i_fop = &smfs_iopen_fops;
                 }
-                if (sargs) { 
-                        struct inode *dir = sargs->s_inode; 
-                        if (dir)
-                                I2SMI(inode)->smi_flags = I2SMI(dir)->smi_flags;
-                }
+                //inherit parent inode flags
+                if (sargs->s_inode) 
+                        I2SMI(inode)->smi_flags = I2SMI(sargs->s_inode)->smi_flags;
+                
         } else
                 LBUG();
 }
@@ -139,6 +138,10 @@ static int smfs_test_inode(struct inode *inode, void *opaque)
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 int smfs_set_inode(struct inode *inode, void *opaque)
 {
+        struct smfs_iget_args *sargs = opaque;
+        
+        inode->i_ino = sargs->s_ino;
+        
         return 0;
 }
 
@@ -155,11 +158,11 @@ static struct inode *smfs_iget(struct super_block *sb, ino_t hash,
                         smfs_init_inode_info(inode, (void*)sargs);
                         unlock_new_inode(inode);
                 }
-                //inode->i_ino = hash;
+                
                 CDEBUG(D_INODE, "inode: %lu/%u(%p) index %d "
                        "ino %d\n", inode->i_ino, inode->i_generation,
                        inode, sargs->s_index, sargs->s_ino);
-                inode->i_ino = hash;
+                
         }
         return inode;
 }
-- 
1.8.3.1