Can be fetched from github: https://github.com/adam900710/btrfs-progs.git convert_rework_for_4.9 This is mainly to fix problems exposed by Chandan's fix for 64K nodesize. The problem is, although we're still using old rollback functions, it has quite a lot of problems to support the new behavior. 1) Can't rollback new convert image with new data chunk Chunk level check can't handle newly allocated data chunk, which is not 1:1 mapped but completely valid in new behavior. The last patch will enhance the test case to handle it. 2) Can't rollback real no-hole image Since it assumes hole file extent as requirement. And due to the possibility to enable no_holes halfway, btrfsck won't report such error, since it's acceptable. 3) Too complex logic, and RW btrfs tree operations In fact, considering how small data we need to rewrite (1M + 128K), we don't really need to open btrfs read-write. Just copy needed data and re-fill. Simple and easy. Thanks Chandan, his report on failure of rollback leads to this rework. And this is still small fixes, most of the patch are just deleting old codes. All rollback test cases from btrfs-progs and fstests are passed. v2: Fix a bug that we can still rollback if convert subvolume is just orphaned, not deleted. Exposed by btrfs/012. v3: Better patch split. Now only one patch is larger than 200 lines(214 lines) Fix regression introduced in last minute update of v2 patch. Remove duplicated bs= options. Qu Wenruo (6): btrfs-progs: file-item: Fix wrong file extents inserted btrfs-progs: utils: Introduce basic set operations for range btrfs-progs: convert: Introduce function to record relocated ranges btrfs-progs: convert: Introduce new function to check if we can rollback btrfs-progs: convert: Switch to new rollback function btrfs-progs: convert-test: trigger chunk allocation after convert convert/main.c | 744 ++++++++++++++++++++++----------------------------- disk-io.h | 9 +- file-item.c | 11 + tests/common | 4 + tests/common.convert | 3 + utils.h | 19 ++ 6 files changed, 366 insertions(+), 424 deletions(-) -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
