]> nv-tegra.nvidia Code Review - linux-2.6.git/blobdiff - fs/nfs/dir.c
NFS: Cleanup initialisation of struct nfs_fattr
[linux-2.6.git] / fs / nfs / dir.c
index b38a57e78a63d8fd91866b2649e58c410d2a50ec..b8a73045e9a0716bd02e58feb05e0412f9e47e3d 100644 (file)
@@ -182,14 +182,16 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
                /* We requested READDIRPLUS, but the server doesn't grok it */
                if (error == -ENOTSUPP && desc->plus) {
                        NFS_SERVER(inode)->caps &= ~NFS_CAP_READDIRPLUS;
-                       NFS_FLAGS(inode) &= ~NFS_INO_ADVISE_RDPLUS;
+                       clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
                        desc->plus = 0;
                        goto again;
                }
                goto error;
        }
        SetPageUptodate(page);
-       NFS_FLAGS(inode) |= NFS_INO_INVALID_ATIME;
+       spin_lock(&inode->i_lock);
+       NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
+       spin_unlock(&inode->i_lock);
        /* Ensure consistent page alignment of the data.
         * Note: assumes we have exclusive access to this mapping either
         *       through inode->i_sem or some other mechanism.
@@ -462,7 +464,9 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
                                                page,
                                                NFS_SERVER(inode)->dtsize,
                                                desc->plus);
-       NFS_FLAGS(inode) |= NFS_INO_INVALID_ATIME;
+       spin_lock(&inode->i_lock);
+       NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
+       spin_unlock(&inode->i_lock);
        desc->page = page;
        desc->ptr = kmap(page);         /* matching kunmap in nfs_do_filldir */
        if (desc->error >= 0) {
@@ -528,6 +532,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
        my_entry.eof = 0;
        my_entry.fh = &fh;
        my_entry.fattr = &fattr;
+       nfs_fattr_init(&fattr);
        desc->entry = &my_entry;
 
        while(!desc->entry->eof) {
@@ -545,7 +550,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
                        break;
                }
                if (res == -ETOOSMALL && desc->plus) {
-                       NFS_FLAGS(inode) &= ~NFS_INO_ADVISE_RDPLUS;
+                       clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
                        nfs_zap_caches(inode);
                        desc->plus = 0;
                        desc->entry->eof = 0;
@@ -561,8 +566,6 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
                }
        }
        unlock_kernel();
-       if (desc->error < 0)
-               return desc->error;
        if (res < 0)
                return res;
        return 0;
@@ -608,7 +611,7 @@ static inline int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
 {
        if (IS_ROOT(dentry))
                return 1;
-       if ((NFS_FLAGS(dir) & NFS_INO_INVALID_ATTR) != 0
+       if ((NFS_I(dir)->cache_validity & NFS_INO_INVALID_ATTR) != 0
                        || nfs_attribute_timeout(dir))
                return 0;
        return nfs_verify_change_attribute(dir, (unsigned long)dentry->d_fsdata);
@@ -799,6 +802,7 @@ static int nfs_dentry_delete(struct dentry *dentry)
  */
 static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
 {
+       nfs_inode_return_delegation(inode);
        if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
                lock_kernel();
                inode->i_nlink--;
@@ -912,7 +916,6 @@ static int is_atomic_open(struct inode *dir, struct nameidata *nd)
 static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
        struct dentry *res = NULL;
-       struct inode *inode = NULL;
        int error;
 
        /* Check that we are indeed trying to open this file */
@@ -926,8 +929,10 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
        dentry->d_op = NFS_PROTO(dir)->dentry_ops;
 
        /* Let vfs_create() deal with O_EXCL */
-       if (nd->intent.open.flags & O_EXCL)
-               goto no_entry;
+       if (nd->intent.open.flags & O_EXCL) {
+               d_add(dentry, NULL);
+               goto out;
+       }
 
        /* Open the file on the server */
        lock_kernel();
@@ -935,37 +940,36 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
        error = nfs_revalidate_inode(NFS_SERVER(dir), dir);
        if (error < 0) {
                res = ERR_PTR(error);
+               unlock_kernel();
                goto out;
        }
 
        if (nd->intent.open.flags & O_CREAT) {
                nfs_begin_data_update(dir);
-               inode = nfs4_atomic_open(dir, dentry, nd);
+               res = nfs4_atomic_open(dir, dentry, nd);
                nfs_end_data_update(dir);
        } else
-               inode = nfs4_atomic_open(dir, dentry, nd);
+               res = nfs4_atomic_open(dir, dentry, nd);
        unlock_kernel();
-       if (IS_ERR(inode)) {
-               error = PTR_ERR(inode);
+       if (IS_ERR(res)) {
+               error = PTR_ERR(res);
                switch (error) {
                        /* Make a negative dentry */
                        case -ENOENT:
-                               inode = NULL;
-                               break;
+                               res = NULL;
+                               goto out;
                        /* This turned out not to be a regular file */
+                       case -EISDIR:
+                       case -ENOTDIR:
+                               goto no_open;
                        case -ELOOP:
                                if (!(nd->intent.open.flags & O_NOFOLLOW))
                                        goto no_open;
-                       /* case -EISDIR: */
                        /* case -EINVAL: */
                        default:
-                               res = ERR_PTR(error);
                                goto out;
                }
-       }
-no_entry:
-       res = d_add_unique(dentry, inode);
-       if (res != NULL)
+       } else if (res != NULL)
                dentry = res;
        nfs_renew_times(dentry);
        nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
@@ -1009,7 +1013,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
         */
        lock_kernel();
        verifier = nfs_save_change_attribute(dir);
-       ret = nfs4_open_revalidate(dir, dentry, openflags);
+       ret = nfs4_open_revalidate(dir, dentry, openflags, nd);
        if (!ret)
                nfs_set_verifier(dentry, verifier);
        unlock_kernel();
@@ -1132,7 +1136,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
 
        lock_kernel();
        nfs_begin_data_update(dir);
-       error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
+       error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd);
        nfs_end_data_update(dir);
        if (error != 0)
                goto out_err;
@@ -1327,6 +1331,7 @@ static int nfs_safe_remove(struct dentry *dentry)
 
        nfs_begin_data_update(dir);
        if (inode != NULL) {
+               nfs_inode_return_delegation(inode);
                nfs_begin_data_update(inode);
                error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
                /* The VFS may want to delete this inode */
@@ -1507,9 +1512,11 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         */
        if (!new_inode)
                goto go_ahead;
-       if (S_ISDIR(new_inode->i_mode))
-               goto out;
-       else if (atomic_read(&new_dentry->d_count) > 2) {
+       if (S_ISDIR(new_inode->i_mode)) {
+               error = -EISDIR;
+               if (!S_ISDIR(old_inode->i_mode))
+                       goto out;
+       } else if (atomic_read(&new_dentry->d_count) > 2) {
                int err;
                /* copy the target dentry's name */
                dentry = d_alloc(new_dentry->d_parent,
@@ -1534,7 +1541,8 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 #endif
                        goto out;
                }
-       }
+       } else
+               new_inode->i_nlink--;
 
 go_ahead:
        /*
@@ -1544,6 +1552,7 @@ go_ahead:
                nfs_wb_all(old_inode);
                shrink_dcache_parent(old_dentry);
        }
+       nfs_inode_return_delegation(old_inode);
 
        if (new_inode)
                d_delete(new_dentry);
@@ -1575,11 +1584,12 @@ out:
 
 int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, struct nfs_access_entry *res)
 {
-       struct nfs_access_entry *cache = &NFS_I(inode)->cache_access;
+       struct nfs_inode *nfsi = NFS_I(inode);
+       struct nfs_access_entry *cache = &nfsi->cache_access;
 
        if (cache->cred != cred
                        || time_after(jiffies, cache->jiffies + NFS_ATTRTIMEO(inode))
-                       || (NFS_FLAGS(inode) & NFS_INO_INVALID_ACCESS))
+                       || (nfsi->cache_validity & NFS_INO_INVALID_ACCESS))
                return -ENOENT;
        memcpy(res, cache, sizeof(*res));
        return 0;
@@ -1587,14 +1597,18 @@ int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, struct nfs
 
 void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set)
 {
-       struct nfs_access_entry *cache = &NFS_I(inode)->cache_access;
+       struct nfs_inode *nfsi = NFS_I(inode);
+       struct nfs_access_entry *cache = &nfsi->cache_access;
 
        if (cache->cred != set->cred) {
                if (cache->cred)
                        put_rpccred(cache->cred);
                cache->cred = get_rpccred(set->cred);
        }
-       NFS_FLAGS(inode) &= ~NFS_INO_INVALID_ACCESS;
+       /* FIXME: replace current access_cache BKL reliance with inode->i_lock */
+       spin_lock(&inode->i_lock);
+       nfsi->cache_validity &= ~NFS_INO_INVALID_ACCESS;
+       spin_unlock(&inode->i_lock);
        cache->jiffies = set->jiffies;
        cache->mask = set->mask;
 }