Commit 17793e3e6a ("Btrfs-progs: extend the extent cache for the
device extent") extended the cache extent APIs to support objectid to
distinguish between phyisical extents with same dimensions but on
different devices. However, it seems that this particular function is
not used to allocate a device extent with accompanying objectid.
Instead such extents as processed solely by insert_device_extent_record.
Remove the unused code as a result.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This add_merge_cache_extent() function will try to merge adjusted
cache_extent.
This is used for later btrfs-convert ext2 free space cache.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There are quite a lot search/lookup functions with different behavior,
add comments for them, as it will take extra time to view source to
understand the behavior difference.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Allow direct search for the last cache extent.
Provide the basis for finding the last ino in inode_cache.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
As we know, btrfs can manage several devices in the same fs, so [offset, size]
is not sufficient for unique identification of an device extent, we need the
device id to identify the device extents which have the same offset and size,
but are not in the same device. So, we added a member variant named objectid
into the extent cache, and introduced some functions to make the extent cache
be suitable to manage the device extent.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
In fact, the code of many rb-tree insert/search/delete functions is similar,
so we can abstract them, and implement common functions for rb-tree, and then
simplify them.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
External software wanting to use the functionality provided by the btrfs
send ioctl has a hard time doing so without replicating tons of work. Of
particular interest are functions like btrfs_read_and_process_send_stream()
and subvol_uuid_search(). As that functionality requires a bit more than
just send-stream.c and send-utils.c we have to pull in some other parts of
the progs package.
This patch adds code to the Makefile and headers to create a library,
libbtrfs which the btrfs command now links to.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: David Sterba <dsterba@suse.cz>
This patch makes btrfsck check more things, including
directory items, file extents, checksumming, inode link
counts etc.
The code for these checks is similar to the code verifies
extent back references. The main difference is that
shared tree blocks are treated specially. The partial
checking results(unresolved references and/or errors)
of shared sub-trees are cached. This avoids scanning
the shared blocks several times. Thank you,
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
This patch ports extent buffer to btrfs-progs. extent_map.c contains a
simplified extent map tree and functions that manipulate/manage extent
buffer. extent state related codes are based on corresponding codes in
kernel module, codes that manage extent buffer are from disk-io.c.
David Sterba