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* btrfs-progs: libify some parts of btrfs-progsMark Fasheh2013-02-27
| | | | | | | | | | | | | | | 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>
* Btrfs-progs: fix several complie warningMiao Xie2012-10-04
| | | | | | | | | | | | | | This patch fixed the following warning: cmds-send.c:464:6: warning: ‘ret' may be used uninitialized in this function [-Wuninitialized] crc32c.c:121:1: warning: control reaches end of non-void function [-Wreturn-type] send-utils.c:69:11: warning: ‘comp' may be used uninitialized in this function [-Wuninitialized] send-utils.c:126:6: warning: ‘comp' may be used uninitialized in this function [-Wuninitialized] send-utils.c:99:22: warning: ‘entry' may be used uninitialized in this function [-Wuninitialized] btrfs.c:261:2: warning: implicit declaration of function ‘crc32c_optimization_init' [-Wimplicit-function-declaration] btrfs.c:105:2: warning: ‘cmd' may be used uninitialized in this function [-Wuninitialized] restore.c:435:12: warning: ignoring return value of ‘ftruncate', declared with attribute warn_unused_result [-Wunused-result] Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
* Use intel hardware crc32c where availableChris Mason2012-07-26
| | | | Signed-off-by: Chris Mason <chris.mason@fusionio.com>
* Mixed back reference (FORWARD ROLLING FORMAT CHANGE)Chris Mason2009-06-08
| | | | | | | | | | | | | | | | | This commit introduces a new kind of back reference for btrfs metadata. Once a filesystem has been mounted with this commit, IT WILL NO LONGER BE MOUNTABLE BY OLDER KERNELS. The new back ref provides information about pointer's key, level and in which tree the pointer lives. This information allow us to find the pointer by searching the tree. The shortcoming of the new back ref is that it only works for pointers in tree blocks referenced by their owner trees. This is mostly a problem for snapshots, where resolving one of these fuzzy back references would be O(number_of_snapshots) and quite slow. The solution used here is to use the fuzzy back references in the common case where a given tree block is only referenced by one root, and use the full back references when multiple roots have a reference
* calculate checksums during IOJosef Bacik2007-06-28