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Ming Lei b465ae7b25 ublk: add feature UBLK_F_QUIESCE
Add feature UBLK_F_QUIESCE, which adds control command `UBLK_U_CMD_QUIESCE_DEV`
for quiescing device, then device state can become `UBLK_S_DEV_QUIESCED`
or `UBLK_S_DEV_FAIL_IO` finally from ublk_ch_release() with ublk server
cooperation.

This feature can help to support to upgrade ublk server application by
shutting down ublk server gracefully, meantime keep ublk block device
persistent during the upgrading period.

The feature is only available for UBLK_F_USER_RECOVERY.

Suggested-by: Yoav Cohen <yoav@nvidia.com>
Link: https://lore.kernel.org/linux-block/DM4PR12MB632807AB7CDCE77D1E5AB7D0A9B92@DM4PR12MB6328.namprd12.prod.outlook.com/
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20250522163523.406289-3-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-05-23 09:42:12 -06:00
arch block: remove bounce buffering support 2025-05-05 13:22:39 -06:00
block blk-mq: add a copyright notice to blk-mq-dma.c 2025-05-16 08:43:41 -06:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: ahash - Disable request chaining 2025-04-12 09:33:09 +08:00
Documentation block: introduce a write_stream_granularity queue limit 2025-05-06 07:46:43 -06:00
drivers ublk: add feature UBLK_F_QUIESCE 2025-05-23 09:42:12 -06:00
fs fs: aio: initialize .ki_write_stream of read-write request 2025-05-07 08:00:11 -06:00
include ublk: add feature UBLK_F_QUIESCE 2025-05-23 09:42:12 -06:00
init Kconfig: switch CONFIG_SYSFS_SYCALL default to n 2025-04-15 10:28:35 +02:00
io_uring io_uring: enable per-io write streams 2025-05-06 07:46:43 -06:00
ipc treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
kernel traceevent/block: Add REQ_ATOMIC flag to block trace events 2025-05-23 09:18:48 -06:00
lib hardening fixes for v6.15-rc3 2025-04-18 13:20:20 -07:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm dmapool: add NUMA affinity support 2025-05-20 05:34:27 +02:00
net Including fixes from Bluetooth, CAN and Netfilter. 2025-04-17 11:45:30 -07:00
rust rust: helpers: Add dma_alloc_attrs() and dma_free_attrs() 2025-04-15 23:06:03 +02:00
samples samples/livepatch: add module descriptions 2025-04-11 17:32:38 -07:00
scripts Rust fixes for v6.15 2025-04-19 10:02:43 -07:00
security hardening: Disable GCC randstruct for COMPILE_TEST 2025-04-15 13:50:17 -07:00
sound ASoC: Fixes for v6.15 2025-04-11 15:51:19 +02:00
tools selftests: ublk: add test case for UBLK_U_CMD_UPDATE_SIZE 2025-05-23 09:42:12 -06:00
usr kbuild: hdrcheck: fix cross build with clang 2025-03-05 04:06:45 +09:00
virt ARM: 2025-04-08 13:47:55 -07:00
.clang-format clang-format: Update the ForEachMacros list for v6.15-rc1 2025-04-13 11:03:59 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-01-10 00:17:25 +01:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: Create intermediate vmlinux build with relocations preserved 2025-03-17 00:29:50 +09:00
.mailmap sound fixes for 6.15-rc3 2025-04-17 10:14:51 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: update SLAB ALLOCATOR maintainers 2025-04-17 20:10:06 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS Documentation: Document the new zoned loop block device driver 2025-05-01 17:03:56 -06:00
Makefile gcc-15: disable '-Wunterminated-string-initialization' entirely for now 2025-04-20 15:30:53 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.