Can be fetched from github: https://github.com/adam900710/btrfs-progs/tree/mkfs_qgroup This patchset adds quota support, which means the result fs will have quota enabled by default, and its accounting is already consistent, no manually rescan or quota enable is needed. The overall design of such support is: 1) Create needed tree Both btrfs_root and real root item and tree root leaf. For this, a new infrastructure, btrfs_create_tree(), is added for this. 2) Fill quota root with basic skeleton Only 3 items are really needed a) global quota status item b) quota info for specified qgroup c) quota limit for specified qgroup Currently only 0/5 qgroup is passed. If we're going to support extra subvolume at mkfs time, just pass the subvolume id into insert_qgroup_items(). The content doesn't matter at all. 3) Repair qgroups using infrastructure from qgroup-verify In fact, qgroup repair is just offline rescan. Although the original qgroup-verify infrastructure is mostly noisy, modify it a little to make it silent to function as offline quota rescan. And such support is mainly designed for developers and QA guys. As to enable quota, before we must normally mount the fs, enable quota (and rescan if needed). This ioctl based procedure is not common, and fstests doesn't provide such support. There are several attempts to make fstests to support it, but due to different reasons, all these attempts failed. To make it easier to test all existing test cases with btrfs quota enabled, the current best method is to support quota at mkfs time, and here comes the patchset. BTW with -R|--runtime-features, we have several possible target to add. Not limited to such ioctl based operation, but also mount option based ones. Like space-cache-tree (space_cache=v2). Qu Wenruo (12): btrfs-progs: qgroup-verify: Also repair qgroup status version btrfs-progs: qgroup-verify: Use fs_info->readonly to check if we should repair qgroups btrfs-progs: qgroup-verify: Move qgroup classification out of report_qgroups btrfs-progs: qgroup-verify: Allow repair_qgroups function to do silent repair btrfs-progs: ctree: Introduce function to create an empty tree btrfs-progs: mkfs: Introduce function to insert qgroup info and limit items ^^^ Above patches are not modified at all ^^^ vvv Modification starts below vvv btrfs-progs: mkfs: Introduce function to setup quota root and rescan btrfs-progs: fsfeatures: Introduce a new set of features, runtime_features btrfs-progs: mkfs: Introduce --runtime-features option btrfs-progs: mkfs: Introduce quota runtime feature btrfs-progs: test/mkfs: Add test case for -R quota option btrfs-progs: test/mkfs: Add test case for --rootdir and -R quota Documentation/mkfs.btrfs.asciidoc | 23 +++ cmds-check.c | 2 +- convert/main.c | 4 +- ctree.c | 109 ++++++++++++++ ctree.h | 3 + fsfeatures.c | 131 ++++++++++++++--- fsfeatures.h | 10 +- mkfs/main.c | 194 ++++++++++++++++++++++--- qgroup-verify.c | 51 +++++-- qgroup-verify.h | 2 +- tests/mkfs-tests/001-basic-profiles/test.sh | 10 ++ tests/mkfs-tests/010-rootdir-and-quota/test.sh | 51 +++++++ 12 files changed, 529 insertions(+), 61 deletions(-) create mode 100755 tests/mkfs-tests/010-rootdir-and-quota/test.sh -- 2.15.0 -- 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
