Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

[safe/jmp/linux-2.6] / fs / btrfs / inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5792816..3cee77a 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -360,6 +360,19 @@ again:
        nr_pages = (end >> PAGE_CACHE_SHIFT) - (start >> PAGE_CACHE_SHIFT) + 1;
        nr_pages = min(nr_pages, (128 * 1024UL) / PAGE_CACHE_SIZE);
 
+       /*
+        * we don't want to send crud past the end of i_size through
+        * compression, that's just a waste of CPU time.  So, if the
+        * end of the file is before the start of our current
+        * requested range of bytes, we bail out to the uncompressed
+        * cleanup code that can deal with all of this.
+        *
+        * It isn't really the fastest way to fix things, but this is a
+        * very uncommon corner.
+        */
+       if (actual_end <= start)
+               goto cleanup_and_bail_uncompressed;
+
        total_compressed = actual_end - start;
 
        /* we want to make sure that amount of ram required to uncompress
@@ -504,6 +517,7 @@ again:
                        goto again;
                }
        } else {
+cleanup_and_bail_uncompressed:
                /*
                 * No compression, but we still need to write the pages in
                 * the file we've been given so far.  redirty the locked
@@ -2490,7 +2504,7 @@ noinline int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
        struct btrfs_path *path;
        struct btrfs_key key;
        struct btrfs_key found_key;
-       u32 found_type;
+       u32 found_type = (u8)-1;
        struct extent_buffer *leaf;
        struct btrfs_file_extent_item *fi;
        u64 extent_start = 0;
@@ -2517,8 +2531,6 @@ noinline int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
        key.offset = (u64)-1;
        key.type = (u8)-1;
 
-       btrfs_init_path(path);
-
 search_again:
        ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
        if (ret < 0)
@@ -2677,6 +2689,8 @@ next:
                        if (pending_del_nr)
                                goto del_pending;
                        btrfs_release_path(root, path);
+                       if (found_type == BTRFS_INODE_ITEM_KEY)
+                               break;
                        goto search_again;
                }
 
@@ -2693,6 +2707,8 @@ del_pending:
                        BUG_ON(ret);
                        pending_del_nr = 0;
                        btrfs_release_path(root, path);
+                       if (found_type == BTRFS_INODE_ITEM_KEY)
+                               break;
                        goto search_again;
                }
        }
@@ -3473,7 +3489,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
 
        inode->i_uid = current_fsuid();
 
-       if (dir->i_mode & S_ISGID) {
+       if (dir && (dir->i_mode & S_ISGID)) {
                inode->i_gid = dir->i_gid;
                if (S_ISDIR(mode))
                        mode |= S_ISGID;
@@ -4245,7 +4261,7 @@ static int btrfs_releasepage(struct page *page, gfp_t gfp_flags)
 {
        if (PageWriteback(page) || PageDirty(page))
                return 0;
-       return __btrfs_releasepage(page, gfp_flags);
+       return __btrfs_releasepage(page, gfp_flags & GFP_NOFS);
 }
 
 static void btrfs_invalidatepage(struct page *page, unsigned long offset)