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Howlett" Cc: linux-block@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andreas Hindborg X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=3986; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=APKT03ZiQU135E3WUwHyPYiO1viCqNZ5coeNcIBfq84=; b=owEBbQKS/ZANAwAKAeG4Gj55KGN3AcsmYgBpklhfgXdxK7ttXIOY8hQZaSYd5Mu4euKOGaiXx 5uLWTbYb22JAjMEAAEKAB0WIQQSwflHVr98KhXWwBLhuBo+eShjdwUCaZJYXwAKCRDhuBo+eShj d40HEACZ5T4gkVkYvJNBnOSrIznKGWvjkIyhCyZHxOH9+g7Y0MC6tHeoEYprX5ajdXLwiM57ykV 20YFMSaXWARI/zRNd0iBhRfr2sLliHiEAjhALtiU/exWz84ntqj7x91LQfT68LO2ssjRBhvqW2O DYM9rEfZqTmuCK1cBFkFWPAmcZ0xaZGncNLwz5sK5mgrlydVPiYj/rjQI70Jk/IozMq2lVnn8ol mdx4uQnQ6SneDipQdYxwbHO5fULYmB6KzyVvu/7H5J+nKpwyvJZj6AoJ3XcnutJNMuIH9TwLrH9 DzM6h0CHQI0Oufl1qnf8mZ0cV/pnKKCPE6LftOZ1rAFQ6rvKJPVBOJWLxbJlIvlxqOERfHWyGdY QV+1Bt75TnNe2nufG3fkconWds293dATdw0C625tXnqC7ybMqWuXCYY9v9aRm7GQ/r/814TuHGG SljZZ1Dh2d+I3fl2I0exPjJAREe7FQ6nQVggS7sh7w94+g7oypSNUz/QNrm3VnCZE33gkE+/QM6 a6cDED5Iqkm8vHEkr0+kK9cmufDBHfU47j+XDBLPNTi5Ro7t0T5tlFbX6ee8+kGftqnU2/p5kN0 wmpNcSwKJ7vTiJICdhewvzxAlmuHHosKs18vhHQ0/PTGuknXPTOBLb1Ef7+fdJ7ZIsCadz1Ry0C ilaIYwkI9anAQuQ== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: BDAD3C0007 X-Stat-Signature: cchanzdk751kcz64icgnu3set6zbi56z X-Rspam-User: X-HE-Tag: 1771199191-682012 X-HE-Meta: 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 5H+tFMoD vNl01c4MuYmkqBihNUmPDrhjsZooSYGyFBuQnj6UbUtVe3bydr45xmSqv2f0Q7LWWTXcPLEtcHr/voJ97Q0biUhZ9QLNt+NUNUi8yW3iKdErYwmp5SZvZrLgZKVQN3c44cYjHkOpB/BDCnkPf7aYxxgC0oHpB34u1oAPSuxrd7iyEcdj1KS0Z7X+gmd17WWlT9qeEGGt7YwjsOZCcqdkcHScFTBvmpJT085qdtKorEufLktY7im4n7muwgjwBwHguSWv/Abtlz2mSCUGH3LPlYUaurPOLPSjSqfxNK7UOEMuv5DuKmOwhaGHWUfL0O26DrrDW X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add module parameter and configfs option for controlling the maximum size of an IO for the emulated block device. Signed-off-by: Andreas Hindborg --- drivers/block/rnull/configfs.rs | 5 +++++ drivers/block/rnull/rnull.rs | 10 +++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/block/rnull/configfs.rs b/drivers/block/rnull/configfs.rs index b449ac882d961..9eaace8b4257e 100644 --- a/drivers/block/rnull/configfs.rs +++ b/drivers/block/rnull/configfs.rs @@ -122,6 +122,7 @@ fn make_group( zone_append_max_sectors: 26, poll_queues: 27, fua: 28, + max_sectors: 29, ], }; @@ -208,6 +209,7 @@ fn make_group( requeue_inject, #[cfg(CONFIG_BLK_DEV_RUST_NULL_FAULT_INJECTION)] init_hctx_inject, + max_sectors: 0, }), }), default_groups, @@ -290,6 +292,7 @@ struct DeviceConfigInner { requeue_inject: Arc, #[cfg(CONFIG_BLK_DEV_RUST_NULL_FAULT_INJECTION)] init_hctx_inject: Arc, + max_sectors: u32, } #[vtable] @@ -347,6 +350,7 @@ fn store(this: &DeviceConfig, page: &[u8]) -> Result { init_hctx_inject: guard.init_hctx_inject.clone(), #[cfg(CONFIG_BLK_DEV_RUST_NULL_FAULT_INJECTION)] timeout_inject: guard.timeout_inject.clone(), + max_sectors: guard.max_sectors, })?); guard.powered = true; } else if guard.powered && !power_op { @@ -624,3 +628,4 @@ fn store(this: &DeviceConfig, page: &[u8]) -> Result { }, } configfs_simple_bool_field!(DeviceConfig, 28, fua); +configfs_simple_field!(DeviceConfig, 29, max_sectors, u32); diff --git a/drivers/block/rnull/rnull.rs b/drivers/block/rnull/rnull.rs index b2b089a657f12..495a810f4f4e1 100644 --- a/drivers/block/rnull/rnull.rs +++ b/drivers/block/rnull/rnull.rs @@ -206,6 +206,10 @@ default: 1, description: "Enable/disable FUA support when cache_size is used. Default: 1 (true)", }, + max_sectors: u32 { + default: 0, + description: "Maximum size of a command (in 512B sectors)", + }, }, } @@ -282,6 +286,7 @@ fn init(_module: &'static ThisModule) -> impl PinInit { )?, #[cfg(CONFIG_BLK_DEV_RUST_NULL_FAULT_INJECTION)] timeout_inject: Arc::pin_init(FaultConfig::new(c"timeout_inject"), GFP_KERNEL)?, + max_sectors: *module_parameters::max_sectors.value(), })?; disks.push(disk, GFP_KERNEL)?; } @@ -336,6 +341,7 @@ struct NullBlkOptions<'a> { init_hctx_inject: Arc, #[cfg(CONFIG_BLK_DEV_RUST_NULL_FAULT_INJECTION)] timeout_inject: Arc, + max_sectors: u32, } static SHARED_TAG_SET: SetOnce>> = SetOnce::new(); @@ -407,6 +413,7 @@ fn new(options: NullBlkOptions<'_>) -> Result>> { init_hctx_inject, #[cfg(CONFIG_BLK_DEV_RUST_NULL_FAULT_INJECTION)] timeout_inject, + max_sectors, } = options; let mut flags = mq::tag_set::Flags::default(); @@ -502,7 +509,8 @@ fn new(options: NullBlkOptions<'_>) -> Result>> { .physical_block_size(block_size_bytes)? .rotational(rotational) .write_cache(storage.cache_enabled()) - .forced_unit_access(forced_unit_access && storage.cache_enabled()); + .forced_unit_access(forced_unit_access && storage.cache_enabled()) + .max_sectors(max_sectors); #[cfg(CONFIG_BLK_DEV_ZONED)] { -- 2.51.2