| Message ID | cover.1644519257.git.osandov@fb.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | btrfs: add ioctls and send/receive support for reading/writing compressed data | expand |
On Thu, Feb 10, 2022 at 11:09:50AM -0800, Omar Sandoval wrote: > From: Omar Sandoval <osandov@fb.com> > > This series has three parts: new Btrfs ioctls for reading/writing > compressed data, support for sending compressed data via Btrfs send, and > btrfs-progs support for sending/receiving compressed data and writing it > with the new ioctl. > > Patches 1 and 2 are VFS changes exporting a couple of helpers for checks > needed by reads and writes. Patches 3-8 are preparatory Btrfs changes > for compressed reads and writes. Patch 6 is a cleanup. Patch 9 adds the > compressed read ioctl and patch 10 adds the compressed write ioctl. > > The main use-case for this interface is Btrfs send/receive. Currently, > when sending data from one compressed filesystem to another, the sending > side decompresses the data and the receiving side recompresses it before > writing it out. This is wasteful and can be avoided if we can just send > and write compressed extents. > > Patches 11 and 12 are cleanups for Btrfs send. Patches 13-17 add the > Btrfs send support. See the previous posting for more details and > benchmarks [1]. Patches 13-15 prepare some protocol changes for send > stream v2. Patch 16 implements compressed send. Patch 17 enables send > stream v2 and compressed send in the send ioctl when requested. > > These patches are based on Dave Sterba's Btrfs misc-next branch [2], > which is in turn currently based on v5.17-rc3. Test cases are here [3]. > > Changes since v12 [4]: > > - Changed some LZO code to use filesystem sector size instead of page > size. > - Changed to use btrfs_inode_lock() instead of inode_lock(). > - Added explanation of why we don't need to hold mmap lock for encoded > reads to commit message. > - Got rid of GFP_HIGHMEM allocations. > - Changed send protocol definitions to use explicit numbers. > - Changed btrfs send patch to default to protocol v1 for now. > - Style cleanups. > > 1: https://lore.kernel.org/linux-btrfs/cover.1615922753.git.osandov@fb.com/ > 2: https://github.com/kdave/btrfs-devel/tree/misc-next > 3: https://github.com/osandov/xfstests/tree/btrfs-encoded-io > 4: https://lore.kernel.org/linux-btrfs/cover.1637179348.git.osandov@fb.com/ > > Omar Sandoval (17): > fs: export rw_verify_area() > fs: export variant of generic_write_checks without iov_iter > btrfs: don't advance offset for compressed bios in > btrfs_csum_one_bio() > btrfs: add ram_bytes and offset to btrfs_ordered_extent > btrfs: support different disk extent size for delalloc > btrfs: clean up cow_file_range_inline() > btrfs: optionally extend i_size in cow_file_range_inline() > btrfs: add definitions + documentation for encoded I/O ioctls > btrfs: add BTRFS_IOC_ENCODED_READ > btrfs: add BTRFS_IOC_ENCODED_WRITE > btrfs: send: remove unused send_ctx::{total,cmd}_send_size > btrfs: send: explicitly number commands and attributes > btrfs: add send stream v2 definitions > btrfs: send: write larger chunks when using stream v2 > btrfs: send: allocate send buffer with alloc_page() and vmap() for v2 > btrfs: send: send compressed extents with encoded writes > btrfs: send: enable support for stream v2 and compressed writes > > fs/btrfs/compression.c | 10 +- > fs/btrfs/compression.h | 6 +- > fs/btrfs/ctree.h | 19 +- > fs/btrfs/delalloc-space.c | 18 +- > fs/btrfs/file-item.c | 32 +- > fs/btrfs/file.c | 68 ++- > fs/btrfs/inode.c | 930 +++++++++++++++++++++++++++++++++---- > fs/btrfs/ioctl.c | 208 +++++++++ > fs/btrfs/ordered-data.c | 131 ++---- > fs/btrfs/ordered-data.h | 25 +- > fs/btrfs/relocation.c | 2 +- > fs/btrfs/send.c | 324 +++++++++++-- > fs/btrfs/send.h | 142 +++--- > fs/internal.h | 5 - > fs/read_write.c | 34 +- > include/linux/fs.h | 2 + > include/uapi/linux/btrfs.h | 142 +++++- > 17 files changed, 1760 insertions(+), 338 deletions(-) > > The btrfs-progs patches were written by Boris Burkov with some updates > from me. Patches 1-4 are preparation. Patch 5 implements encoded writes. > Patch 6 implements the fallback to decompressing. Patches 7 and 8 > implement the other commands. Patch 9 adds the new `btrfs send` options. > Patch 10 adds a test case. > > Boris Burkov (8): > btrfs-progs: receive: support v2 send stream larger tlv_len > btrfs-progs: receive: dynamically allocate sctx->read_buf > btrfs-progs: receive: support v2 send stream DATA tlv format > btrfs-progs: receive: process encoded_write commands > btrfs-progs: receive: encoded_write fallback to explicit decode and > write > btrfs-progs: receive: process fallocate commands > btrfs-progs: receive: process setflags ioctl commands > btrfs-progs: receive: add tests for basic encoded_write send/receive > > Omar Sandoval (2): > btrfs-progs: receive: add send stream v2 cmds and attrs to send.h > btrfs-progs: send: stream v2 ioctl flags Patches 1-10 (the encoded ioctls) are now in misc-next.
From: Omar Sandoval <osandov@fb.com> This series has three parts: new Btrfs ioctls for reading/writing compressed data, support for sending compressed data via Btrfs send, and btrfs-progs support for sending/receiving compressed data and writing it with the new ioctl. Patches 1 and 2 are VFS changes exporting a couple of helpers for checks needed by reads and writes. Patches 3-8 are preparatory Btrfs changes for compressed reads and writes. Patch 6 is a cleanup. Patch 9 adds the compressed read ioctl and patch 10 adds the compressed write ioctl. The main use-case for this interface is Btrfs send/receive. Currently, when sending data from one compressed filesystem to another, the sending side decompresses the data and the receiving side recompresses it before writing it out. This is wasteful and can be avoided if we can just send and write compressed extents. Patches 11 and 12 are cleanups for Btrfs send. Patches 13-17 add the Btrfs send support. See the previous posting for more details and benchmarks [1]. Patches 13-15 prepare some protocol changes for send stream v2. Patch 16 implements compressed send. Patch 17 enables send stream v2 and compressed send in the send ioctl when requested. These patches are based on Dave Sterba's Btrfs misc-next branch [2], which is in turn currently based on v5.17-rc3. Test cases are here [3]. Changes since v12 [4]: - Changed some LZO code to use filesystem sector size instead of page size. - Changed to use btrfs_inode_lock() instead of inode_lock(). - Added explanation of why we don't need to hold mmap lock for encoded reads to commit message. - Got rid of GFP_HIGHMEM allocations. - Changed send protocol definitions to use explicit numbers. - Changed btrfs send patch to default to protocol v1 for now. - Style cleanups. 1: https://lore.kernel.org/linux-btrfs/cover.1615922753.git.osandov@fb.com/ 2: https://github.com/kdave/btrfs-devel/tree/misc-next 3: https://github.com/osandov/xfstests/tree/btrfs-encoded-io 4: https://lore.kernel.org/linux-btrfs/cover.1637179348.git.osandov@fb.com/ Omar Sandoval (17): fs: export rw_verify_area() fs: export variant of generic_write_checks without iov_iter btrfs: don't advance offset for compressed bios in btrfs_csum_one_bio() btrfs: add ram_bytes and offset to btrfs_ordered_extent btrfs: support different disk extent size for delalloc btrfs: clean up cow_file_range_inline() btrfs: optionally extend i_size in cow_file_range_inline() btrfs: add definitions + documentation for encoded I/O ioctls btrfs: add BTRFS_IOC_ENCODED_READ btrfs: add BTRFS_IOC_ENCODED_WRITE btrfs: send: remove unused send_ctx::{total,cmd}_send_size btrfs: send: explicitly number commands and attributes btrfs: add send stream v2 definitions btrfs: send: write larger chunks when using stream v2 btrfs: send: allocate send buffer with alloc_page() and vmap() for v2 btrfs: send: send compressed extents with encoded writes btrfs: send: enable support for stream v2 and compressed writes fs/btrfs/compression.c | 10 +- fs/btrfs/compression.h | 6 +- fs/btrfs/ctree.h | 19 +- fs/btrfs/delalloc-space.c | 18 +- fs/btrfs/file-item.c | 32 +- fs/btrfs/file.c | 68 ++- fs/btrfs/inode.c | 930 +++++++++++++++++++++++++++++++++---- fs/btrfs/ioctl.c | 208 +++++++++ fs/btrfs/ordered-data.c | 131 ++---- fs/btrfs/ordered-data.h | 25 +- fs/btrfs/relocation.c | 2 +- fs/btrfs/send.c | 324 +++++++++++-- fs/btrfs/send.h | 142 +++--- fs/internal.h | 5 - fs/read_write.c | 34 +- include/linux/fs.h | 2 + include/uapi/linux/btrfs.h | 142 +++++- 17 files changed, 1760 insertions(+), 338 deletions(-) The btrfs-progs patches were written by Boris Burkov with some updates from me. Patches 1-4 are preparation. Patch 5 implements encoded writes. Patch 6 implements the fallback to decompressing. Patches 7 and 8 implement the other commands. Patch 9 adds the new `btrfs send` options. Patch 10 adds a test case. Boris Burkov (8): btrfs-progs: receive: support v2 send stream larger tlv_len btrfs-progs: receive: dynamically allocate sctx->read_buf btrfs-progs: receive: support v2 send stream DATA tlv format btrfs-progs: receive: process encoded_write commands btrfs-progs: receive: encoded_write fallback to explicit decode and write btrfs-progs: receive: process fallocate commands btrfs-progs: receive: process setflags ioctl commands btrfs-progs: receive: add tests for basic encoded_write send/receive Omar Sandoval (2): btrfs-progs: receive: add send stream v2 cmds and attrs to send.h btrfs-progs: send: stream v2 ioctl flags Documentation/btrfs-receive.rst | 5 + Documentation/btrfs-send.rst | 22 ++ cmds/receive-dump.c | 31 +- cmds/receive.c | 347 +++++++++++++++++- cmds/send.c | 100 ++++- common/send-stream.c | 165 +++++++-- common/send-stream.h | 7 + ioctl.h | 151 +++++++- kernel-shared/send.h | 146 +++++--- libbtrfs/send-stream.c | 2 +- .../052-receive-write-encoded/test.sh | 114 ++++++ 11 files changed, 993 insertions(+), 97 deletions(-) create mode 100755 tests/misc-tests/052-receive-write-encoded/test.sh