kernel.git/drivers/md/dm-core.h, branch linux-5.18.y

dm: fix bio_set allocation

2022-06-22T12:28:13Z

commit 29dec90a0f1d961b93f34f910e9319d8cb23edbd upstream. The use of bioset_init_from_src mean that the pre-allocated pools weren't used for anything except parameter passing, and the integrity pool creation got completely lost for the actual live mapped_device. Fix that by assigning the actual preallocated dm_md_mempools to the mapped_device and using that for I/O instead of creating new mempools. Fixes: 2a2a4c510b76 ("dm: use bioset_init_from_src() to copy bio_set") Signed-off-by: Christoph Hellwig Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman

dm: fix dm_io and dm_target_io flags race condition on Alpha

2022-04-01T17:19:27Z

Early alpha processors cannot write a single byte or short; they read 8 bytes, modify the value in registers and write back 8 bytes. This could cause race condition in the structure dm_io - if the fields flags and io_count are modified simultaneously. Fix this bug by using 32-bit flags if we are on Alpha and if we are compiling for a processor that doesn't have the byte-word-extension. Signed-off-by: Mikulas Patocka Fixes: bd4a6dd241ae ("dm: reduce size of dm_io and dm_target_io structs") [snitzer: Jens allowed this change since Mikulas owns a relevant Alpha!] Acked-by: Jens Axboe Signed-off-by: Mike Snitzer

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

2022-03-25T02:37:53Z

Pull SCSI updates from James Bottomley: "This series consists of the usual driver updates (qla2xxx, pm8001, libsas, smartpqi, scsi_debug, lpfc, iscsi, mpi3mr) plus minor updates and bug fixes. The high blast radius core update is the removal of write same, which affects block and several non-SCSI devices. The other big change, which is more local, is the removal of the SCSI pointer" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (281 commits) scsi: scsi_ioctl: Drop needless assignment in sg_io() scsi: bsg: Drop needless assignment in scsi_bsg_sg_io_fn() scsi: lpfc: Copyright updates for 14.2.0.0 patches scsi: lpfc: Update lpfc version to 14.2.0.0 scsi: lpfc: SLI path split: Refactor BSG paths scsi: lpfc: SLI path split: Refactor Abort paths scsi: lpfc: SLI path split: Refactor SCSI paths scsi: lpfc: SLI path split: Refactor CT paths scsi: lpfc: SLI path split: Refactor misc ELS paths scsi: lpfc: SLI path split: Refactor VMID paths scsi: lpfc: SLI path split: Refactor FDISC paths scsi: lpfc: SLI path split: Refactor LS_RJT paths scsi: lpfc: SLI path split: Refactor LS_ACC paths scsi: lpfc: SLI path split: Refactor the RSCN/SCR/RDF/EDC/FARPR paths scsi: lpfc: SLI path split: Refactor PLOGI/PRLI/ADISC/LOGO paths scsi: lpfc: SLI path split: Refactor base ELS paths and the FLOGI path scsi: lpfc: SLI path split: Introduce lpfc_prep_wqe scsi: lpfc: SLI path split: Refactor fast and slow paths to native SLI4 scsi: lpfc: SLI path split: Refactor lpfc_iocbq scsi: lpfc: Use kcalloc() ...

dm: consolidate spinlocks in dm_io struct

2022-03-21T18:15:36Z

No reason to have separate startio_lock and endio_lock given endio_lock could be used during submission anyway. This change leaves the dm_io struct weighing in at 256 bytes (down from 272 bytes, so saves a cacheline). Signed-off-by: Mike Snitzer

dm: reduce size of dm_io and dm_target_io structs

2022-03-21T18:15:35Z

Signed-off-by: Mike Snitzer

dm: switch dm_target_io booleans over to proper flags

2022-03-21T18:15:35Z

Add flags to dm_target_io and manage them using the same pattern used for bi_flags in struct bio. Signed-off-by: Mike Snitzer

dm: switch dm_io booleans over to proper flags

2022-03-21T18:15:34Z

Add flags to dm_io and manage them using the same pattern used for bi_flags in struct bio. Signed-off-by: Mike Snitzer

dm: simplify dm_sumbit_bio_remap interface

2022-03-10T18:44:56Z

Remove the from_wq argument from dm_sumbit_bio_remap(). Eliminates the need for dm_sumbit_bio_remap() callers to know whether they are calling for a workqueue or from the original dm_submit_bio(). Add map_task to dm_io struct, record the map_task in alloc_io and clear it after all target ->map() calls have completed. Update dm_sumbit_bio_remap to check if 'current' matches io->map_task rather than rely on passed 'from_rq' argument. This change really simplifies the chore of porting each DM target to using dm_sumbit_bio_remap() because there is no longer the risk of programming error by not completely knowing all the different contexts a particular method that calls dm_sumbit_bio_remap() might be used in. Signed-off-by: Mike Snitzer

dm: support bio polling

2022-03-09T17:21:56Z

Support bio polling (REQ_POLLED) in the following approach: 1) only support io polling on normal READ/WRITE, and other abnormal IOs still fallback to IRQ mode, so the target io (and DM's clone bio) is exactly inside the dm io. 2) hold one refcnt on io->io_count after submitting this dm bio with REQ_POLLED 3) support dm native bio splitting, any dm io instance associated with current bio will be added into one list which head is bio->bi_private which will be recovered before ending this bio 4) implement .poll_bio() callback, call bio_poll() on the single target bio inside the dm io which is retrieved via bio->bi_bio_drv_data; call dm_io_dec_pending() after the target io is done in .poll_bio() 5) enable QUEUE_FLAG_POLL if all underlying queues enable QUEUE_FLAG_POLL, which is based on Jeffle's previous patch. These changes are good for a 30-35% IOPS improvement for polled IO. For detailed test results please see (Jens, thanks for testing!): https://listman.redhat.com/archives/dm-devel/2022-March/049868.html or https://marc.info/?l=linux-block&m=164684246214700&w=2 Tested-by: Jens Axboe Signed-off-by: Ming Lei Signed-off-by: Mike Snitzer

scsi: dm: Remove WRITE_SAME support

2022-02-23T02:11:08Z

There are no more end-users of REQ_OP_WRITE_SAME left, so we can start deleting it. Link: https://lore.kernel.org/r/20220209082828.2629273-7-hch@lst.de Reviewed-by: Mike Snitzer Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen