Re: Possible bug with FIBMAP

[Alexander Zarochentsev <zam@namesys.com>]

On 27 August 2006 12:57, Brice Arnould wrote:
> Hi
>
> Two users of a hack I wrote told me that
> http://vleu.net/shake/fb_r4.c (also attached with the mail)
> returned "FIBMAP=-22, FIGETBSZ=4096"
> on some of their files on reiser4 filesystems.
>
> Does this value of "-22" have a special meaning (would be strange),
> or is it a bug in Reiser4 ?
> I can ask them for more details, if you want.

Reiser4: restore FIBMAP ioctl support for packed files

restore FIBMAP ioctl support for packed files,
don't report block numbers for not yet mapped to
disk nodes.

Signed-off-by: Alexander Zarochentsev <zam@namesys.com>
---
 fs/reiser4/plugin/item/item.c |    2 +-
 fs/reiser4/plugin/item/tail.c |    2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

--- linux-2.6-git.orig/fs/reiser4/plugin/item/item.c
+++ linux-2.6-git/fs/reiser4/plugin/item/item.c
@@ -614,7 +614,7 @@ item_plugin item_plugins[LAST_ITEM_ID] =
 				.write = reiser4_write_tail,
 				.read = reiser4_read_tail,
 				.readpage = readpage_tail,
-				.get_block = NULL,
+				.get_block = get_block_address_tail,
 				.append_key = append_key_tail,
 				.init_coord_extension =
 				init_coord_extension_tail
--- linux-2.6-git.orig/fs/reiser4/plugin/item/tail.c
+++ linux-2.6-git/fs/reiser4/plugin/item/tail.c
@@ -791,6 +791,8 @@ get_block_address_tail(const coord_t * c
 	assert("nikita-3252", znode_get_level(coord->node) == LEAF_LEVEL);
 
 	*block = *znode_get_block(coord->node);
+	if (reiser4_blocknr_is_fake(block))
+		*block = 0;
 	return 0;
 }