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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=4047; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=KwNsjS9BksChOKWlphQ7tBX5Ukevdabgk4N9RSuoPnU=; b=owEBbQKS/ZANAwAKAeG4Gj55KGN3AcsmYgBpklhAAmONZuTCFAmTy2QHtO/6KeA3aonRqhccD uZyYAiEM3SJAjMEAAEKAB0WIQQSwflHVr98KhXWwBLhuBo+eShjdwUCaZJYQAAKCRDhuBo+eShj d/SdD/4xA7LPhW3edXP28x48xx8Oy40JA8mu40mUSF5x2Tm15UWJyOC4BFixM90yuvg4wTo2zbM 5FjABT+A3GA1+BGStHP8qJFkr/LlankpKRWlAp5QS1fwzoNxiFBtmAzXpEppDrjRCdjb5IO+sTn 0A5pcAJmZCRVPib8vlo5SxL3+A2VBpRxM0BLRiKqgmwDOUoeJxUfMq64NTn21Xyg7QpFKiJuIG1 U5KaR5sY1hftYG38q+wQr2sVXEClQ1+x26DhrIsrneB9Rfr89n36u1ZtawLYg6R64d9xOgsz5Dy CN407ZNK5zGV4OjZVjkHlDK8n950RY/ZRevXXR6IOe07+ymK9yx311faO5rpu+VWEdxBKR6QT+C TWIxrxkT60DXJreOUhL8cnuLfgOhMx6hTBZO0ymjY+kULDyHYZ30QgZxVZkFfNywjxSUCGOMGXK o3jxI4/LUHD8A0tZF50UjiewRjVny1ZvKe5ToPQsRynbkxfzyJrQR07uq3QraGzA9ePn3bn+nZc eFBxwbD2XGyR2cwVAf4hjpQBQjj1GpldPiBqwUSW7Ar7j7kRG0+gGjaB+Vh6HRMAZwRt5Y+Ly6G SBJo8EI5oMVDXucaXmjm0FLx6TtARqzZXTGvr5SW1QfCF7UgcJGhNRr+q7FqMGqdJWkl+dMoRif og+WAb8NDQS7JeQ== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 X-Rspamd-Queue-Id: 9EA62140007 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: ibh3gtmadkkhpbx5qz3t9cjg4cnk5kgy X-HE-Tag: 1771199186-560401 X-HE-Meta: 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 oGUsHugA Pg/YmYF4Cz/ADrotpqGd9zWQ8q8y0p2mgQAbUds3Bg29cdZIvfuBcQm0DTCVCPje8x6momf9h8KXfJhKU+5BR87oVZDocJVwEqI6XnnbMTSw7/ixBWCCi3JOe47ZpDsslr3es7K9NJvIUPriI+0BaLcpdmsFyzEdPwGWd/3U9HN+cb9MpG8XUb4Wpb97o2rg1vWeln7uo1shj4r7UO49n7pnSkr2txupajoya1uW+yUWDzqI2TL2qFGpQDKPswlz/3JcnQFPM7zTkg5Z2sh/8eRiu4hHsZyKrWd/0ZI4ajHuAmOWfsoiWBpw7vo4PcZKNHYxP 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 support for blocking queue mode via the `blocking` configfs attribute. When enabled, the tag set is created with the `BLK_MQ_F_BLOCKING` flag. Signed-off-by: Andreas Hindborg --- drivers/block/rnull/configfs.rs | 7 ++++++- drivers/block/rnull/rnull.rs | 9 ++++++++- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/block/rnull/configfs.rs b/drivers/block/rnull/configfs.rs index d369d8b683c61..640e3de230c0a 100644 --- a/drivers/block/rnull/configfs.rs +++ b/drivers/block/rnull/configfs.rs @@ -70,7 +70,7 @@ impl AttributeOperations<0> for Config { let mut writer = kernel::str::Formatter::new(page); writer.write_str( "blocksize,size,rotational,irqmode,completion_nsec,memory_backed\ - submit_queues,use_per_node_hctx\n", + submit_queues,use_per_node_hctx,discard,blocking\n", )?; Ok(writer.bytes_written()) } @@ -106,6 +106,7 @@ fn make_group( badblocks_partial_io: 14, cache_size_mib: 15, mbps: 16, + blocking: 17, ], }; @@ -138,6 +139,7 @@ fn make_group( )?, cache_size_mib: 0, mbps: 0, + blocking: false, }), }), core::iter::empty(), @@ -203,6 +205,7 @@ struct DeviceConfigInner { cache_size_mib: u64, disk_storage: Arc, mbps: u32, + blocking: bool, } #[vtable] @@ -243,6 +246,7 @@ fn store(this: &DeviceConfig, page: &[u8]) -> Result { bad_blocks_partial_io: guard.bad_blocks_partial_io, storage: guard.disk_storage.clone(), bandwidth_limit: u64::from(guard.mbps) * 2u64.pow(20), + blocking: guard.blocking, })?); guard.powered = true; } else if guard.powered && !power_op { @@ -462,3 +466,4 @@ fn store(this: &DeviceConfig, page: &[u8]) -> Result { ); configfs_simple_field!(DeviceConfig, 16, mbps, u32); +configfs_simple_bool_field!(DeviceConfig, 17, blocking); diff --git a/drivers/block/rnull/rnull.rs b/drivers/block/rnull/rnull.rs index 16a4f915e59f4..cfc00c104d9ca 100644 --- a/drivers/block/rnull/rnull.rs +++ b/drivers/block/rnull/rnull.rs @@ -141,6 +141,10 @@ default: 0, description: "Max bandwidth in MiB/s. 0 means no limit.", }, + blocking: u8 { + default: 0, + description: "Register as a blocking blk-mq driver device", + }, }, } @@ -187,6 +191,7 @@ fn init(_module: &'static ThisModule) -> impl PinInit { bad_blocks_partial_io: false, storage: Arc::pin_init(DiskStorage::new(0, block_size as usize), GFP_KERNEL)?, bandwidth_limit: u64::from(*module_parameters::mbps.value()) * 2u64.pow(20), + blocking: *module_parameters::blocking.value() != 0, })?; disks.push(disk, GFP_KERNEL)?; } @@ -218,6 +223,7 @@ struct NullBlkOptions<'a> { bad_blocks_partial_io: bool, storage: Arc, bandwidth_limit: u64, + blocking: bool, } #[pin_data] @@ -260,6 +266,7 @@ fn new(options: NullBlkOptions<'_>) -> Result>> { bad_blocks_partial_io, storage, bandwidth_limit, + blocking, } = options; let mut flags = mq::tag_set::Flags::default(); @@ -267,7 +274,7 @@ fn new(options: NullBlkOptions<'_>) -> Result>> { // TODO: lim.features |= BLK_FEAT_WRITE_CACHE; // if (dev->fua) // lim.features |= BLK_FEAT_FUA; - if memory_backed { + if blocking || memory_backed { flags |= mq::tag_set::Flag::Blocking; } -- 2.51.2