Merge branch 'btrfs-3.0' into for-linus

[pandora-kernel.git] / fs / btrfs / ioctl.c

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a3c4751..970977a 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -323,7 +323,7 @@ static noinline int create_subvol(struct btrfs_root *root,
        struct btrfs_inode_item *inode_item;
        struct extent_buffer *leaf;
        struct btrfs_root *new_root;
-       struct dentry *parent = dget_parent(dentry);
+       struct dentry *parent = dentry->d_parent;
        struct inode *dir;
        int ret;
        int err;
@@ -332,10 +332,8 @@ static noinline int create_subvol(struct btrfs_root *root,
        u64 index = 0;
 
        ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid);
-       if (ret) {
-               dput(parent);
+       if (ret)
                return ret;
-       }
 
        dir = parent->d_inode;
 
@@ -346,10 +344,8 @@ static noinline int create_subvol(struct btrfs_root *root,
         * 2 - dir items
         */
        trans = btrfs_start_transaction(root, 6);
-       if (IS_ERR(trans)) {
-               dput(parent);
+       if (IS_ERR(trans))
                return PTR_ERR(trans);
-       }
 
        leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
                                      0, objectid, NULL, 0, 0, 0);
@@ -439,7 +435,6 @@ static noinline int create_subvol(struct btrfs_root *root,
 
        d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
 fail:
-       dput(parent);
        if (async_transid) {
                *async_transid = trans->transid;
                err = btrfs_commit_transaction_async(trans, root, 1);
@@ -456,7 +451,6 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
                           bool readonly)
 {
        struct inode *inode;
-       struct dentry *parent;
        struct btrfs_pending_snapshot *pending_snapshot;
        struct btrfs_trans_handle *trans;
        int ret;
@@ -504,9 +498,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
        if (ret)
                goto fail;
 
-       parent = dget_parent(dentry);
-       inode = btrfs_lookup_dentry(parent->d_inode, dentry);
-       dput(parent);
+       inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry);
        if (IS_ERR(inode)) {
                ret = PTR_ERR(inode);
                goto fail;
@@ -867,8 +859,8 @@ again:
        /* step one, lock all the pages */
        for (i = 0; i < num_pages; i++) {
                struct page *page;
-               page = grab_cache_page(inode->i_mapping,
-                                           start_index + i);
+               page = find_or_create_page(inode->i_mapping,
+                                           start_index + i, GFP_NOFS);
                if (!page)
                        break;
 
@@ -938,7 +930,9 @@ again:
                          GFP_NOFS);
 
        if (i_done != num_pages) {
-               atomic_inc(&BTRFS_I(inode)->outstanding_extents);
+               spin_lock(&BTRFS_I(inode)->lock);
+               BTRFS_I(inode)->outstanding_extents++;
+               spin_unlock(&BTRFS_I(inode)->lock);
                btrfs_delalloc_release_space(inode,
                                     (num_pages - i_done) << PAGE_CACHE_SHIFT);
        }
@@ -1755,11 +1749,10 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info,
                key.objectid = key.offset;
                key.offset = (u64)-1;
                dirid = key.objectid;
-
        }
        if (ptr < name)
                goto out;
-       memcpy(name, ptr, total_len);
+       memmove(name, ptr, total_len);
        name[total_len]='\0';
        ret = 0;
 out:
@@ -2243,6 +2236,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
                btrfs_wait_ordered_range(src, off, len);
        }
 
+       /* truncate page cache pages from target inode range */
+       truncate_inode_pages_range(&inode->i_data, off,
+                                  ALIGN(off + len, PAGE_CACHE_SIZE) - 1);
+
        /* clone data */
        key.objectid = btrfs_ino(src);
        key.type = BTRFS_EXTENT_DATA_KEY;