From: Xiubo Li <xiubli@xxxxxxxxxx> This patch series is based on the "fscrypt_size_handling" branch in https://github.com/lxbsz/linux.git, which is based Jeff's "ceph-fscrypt-content-experimental" branch in https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git and added two upstream commits, which should be merged already. These two upstream commits should be removed after Jeff rebase his "ceph-fscrypt-content-experimental" branch to upstream code. ==== This approach is based on the discussion from V1 and V2, which will pass the encrypted last block contents to MDS along with the truncate request. This will send the encrypted last block contents to MDS along with the truncate request when truncating to a smaller size and at the same time new size does not align to BLOCK SIZE. The MDS side patch is raised in PR https://github.com/ceph/ceph/pull/43588, which is also based Jeff's previous great work in PR https://github.com/ceph/ceph/pull/41284. The MDS will use the filer.write_trunc(), which could update and truncate the file in one shot, instead of filer.truncate(). This just assume kclient won't support the inline data feature, which will be remove soon, more detail please see: https://tracker.ceph.com/issues/52916 Changed in V4: - Retry the truncate request by 20 times before fail it with -EAGAIN. - Remove the "fill_last_block" label and move the code to else branch. - Remove the #3 patch, which has already been sent out separately, in V3 series. - Improve some comments in the code. Changed in V3: - Fix possibly corrupting the file just before the MDS acquires the xlock for FILE lock, another client has updated it. - Flush the pagecache buffer before reading the last block for the when filling the truncate request. - Some other minore fixes. Xiubo Li (4): Revert "ceph: make client zero partial trailing block on truncate" ceph: add __ceph_get_caps helper support ceph: add __ceph_sync_read helper support ceph: add truncate size handling support for fscrypt fs/ceph/caps.c | 21 ++-- fs/ceph/file.c | 44 +++++--- fs/ceph/inode.c | 203 ++++++++++++++++++++++++++++++------ fs/ceph/super.h | 6 +- include/linux/ceph/crypto.h | 28 +++++ 5 files changed, 251 insertions(+), 51 deletions(-) create mode 100644 include/linux/ceph/crypto.h -- 2.27.0
