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2021-04-29Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds28-432/+741
Pull SCSI updates from James Bottomley: "This consists of the usual driver updates (ufs, target, tcmu, smartpqi, lpfc, zfcp, qla2xxx, mpt3sas, pm80xx). The major core change is using a sbitmap instead of an atomic for queue tracking" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (412 commits) scsi: target: tcm_fc: Fix a kernel-doc header scsi: target: Shorten ALUA error messages scsi: target: Fix two format specifiers scsi: target: Compare explicitly with SAM_STAT_GOOD scsi: sd: Introduce a new local variable in sd_check_events() scsi: dc395x: Open-code status_byte(u8) calls scsi: 53c700: Open-code status_byte(u8) calls scsi: smartpqi: Remove unused functions scsi: qla4xxx: Remove an unused function scsi: myrs: Remove unused functions scsi: myrb: Remove unused functions scsi: mpt3sas: Fix two kernel-doc headers scsi: fcoe: Suppress a compiler warning scsi: libfc: Fix a format specifier scsi: aacraid: Remove an unused function scsi: core: Introduce enum scsi_disposition scsi: core: Modify the scsi_send_eh_cmnd() return value for the SDEV_BLOCK case scsi: core: Rename scsi_softirq_done() into scsi_complete() scsi: core: Remove an incorrect comment scsi: core: Make the scsi_alloc_sgtables() documentation more accurate ...
2021-04-29Merge tag 'for-5.13/block-2021-04-27' of git://git.kernel.dk/linux-blockLinus Torvalds1-2/+2
Pull block updates from Jens Axboe: "Pretty quiet round this time, which is nice. In detail: - Series revamping bounce buffer support (Christoph) - Dead code removal (Christoph, Bart) - Partition iteration revamp, now using xarray (Christoph) - Passthrough request scheduler improvements (Lin) - Series of BFQ improvements (Paolo) - Fix ioprio task iteration (Peter) - Various little tweaks and fixes (Tejun, Saravanan, Bhaskar, Max, Nikolay)" * tag 'for-5.13/block-2021-04-27' of git://git.kernel.dk/linux-block: (41 commits) blk-iocost: don't ignore vrate_min on QD contention blk-mq: Fix spurious debugfs directory creation during initialization bfq/mq-deadline: remove redundant check for passthrough request blk-mq: bypass IO scheduler's limit_depth for passthrough request block: Remove an obsolete comment from sg_io() block: move bio_list_copy_data to pktcdvd block: remove zero_fill_bio_iter block: add queue_to_disk() to get gendisk from request_queue block: remove an incorrect check from blk_rq_append_bio block: initialize ret in bdev_disk_changed block: Fix sys_ioprio_set(.which=IOPRIO_WHO_PGRP) task iteration block: remove disk_part_iter block: simplify diskstats_show block: simplify show_partition block: simplify printk_all_partitions block: simplify partition_overlaps block: simplify partition removal block: take bd_mutex around delete_partitions in del_gendisk block: refactor blk_drop_partitions block: move more syncing and invalidation to delete_partition ...
2021-04-16scsi: target: tcm_fc: Fix a kernel-doc headerBart Van Assche1-1/+1
Fix the function name in the kernel-doc header above ft_prli(). Link: https://lore.kernel.org/r/20210415220826.29438-21-bvanassche@acm.org Cc: Hannes Reinecke <hare@suse.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-16scsi: target: Shorten ALUA error messagesBart Van Assche1-8/+3
Do not print tg_pt_gp->tg_pt_gp_valid_id if we already know that it is zero. Link: https://lore.kernel.org/r/20210415220826.29438-20-bvanassche@acm.org Cc: Mike Christie <michael.christie@oracle.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-16scsi: target: Fix two format specifiersBart Van Assche1-4/+2
Use format specifier '%u' to format the u32 data type instead of '%hu'. Link: https://lore.kernel.org/r/20210415220826.29438-19-bvanassche@acm.org Cc: Mike Christie <michael.christie@oracle.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-16scsi: target: Compare explicitly with SAM_STAT_GOODBart Van Assche1-1/+1
Instead of leaving it implicit that SAM_STAT_GOOD == 0, compare explicitly with SAM_STAT_GOOD. Link: https://lore.kernel.org/r/20210415220826.29438-18-bvanassche@acm.org Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13scsi: target: tcmu: Make data_pages_per_blk changeable via configfsBodo Stroesser1-2/+53
Make data_pages_per_blk changeable similar to the way it is done for max_data_area_mb. One can change the value by typing: echo "data_pages_per_blk=N" >control The value is printed when doing: cat info In addition, a new readonly attribute 'data_pages_per_blk' returns the value on read. Link: https://lore.kernel.org/r/20210324195758.2021-7-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13scsi: target: tcmu: Replace block size definitions with new udev membersBodo Stroesser1-37/+45
Replace DATA_PAGES_PER_BLK and DATA_BLOCK_SIZE with new struct elements tcmu_dev->data_pages_per_blk and tcmu_dev->data_blk_size. These new variables are still loaded with constant definition DATA_PAGES_PER_BLK_DEF (= 1) and DATA_PAGES_PER_BLK_DEF * PAGE_SIZE. There is no way yet to set the values via configfs. Link: https://lore.kernel.org/r/20210324195758.2021-6-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13scsi: target: tcmu: Remove function tcmu_get_block_page()Bodo Stroesser1-7/+1
There is only one caller of tcmu_get_block_page left. Since it is a one-liner, we can remove the function. Link: https://lore.kernel.org/r/20210324195758.2021-5-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13scsi: target: tcmu: Support DATA_BLOCK_SIZE = N * PAGE_SIZEBodo Stroesser1-89/+116
Change tcmu to support DATA_BLOCK_SIZE being a multiple of PAGE_SIZE. There are two reasons why one would like to have a bigger DATA_BLOCK_SIZE: 1) If userspace - e.g. due to data compression, encryption or deduplication - needs to have receive or transmit data in a consecutive buffer, we can define DATA_BLOCK_SIZE to the maximum size of a SCSI READ/WRITE to enforce that userspace sees just one consecutive buffer. That way we can avoid the need for doing data copy in userspace. 2) Using a bigger data block size can speed up command processing in tcmu. The number of free data blocks to look up in bitmap is reduced substantially. The lookup for data pages in radix_tree can be done more efficiently if there are multiple pages in a data block. The maximum number of IOVs to set up is lower so cmd entries in the ring become smaller. Link: https://lore.kernel.org/r/20210324195758.2021-4-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13scsi: target: tcmu: Prepare for PAGE_SIZE != DATA_BLOCK_SIZEBodo Stroesser1-41/+41
Rename some variables and definitions as a first preparation for DATA_BLOCK_SIZE != PAGE_SIZE and add the new DATA_PAGES_PER_BLK definition containing the number of pages per data block. Rename tcmu_try_get_block_page() to tcmu_try_get_data_page(). Keep name tcmu_get_block_page() since it will go away in a following commit when there is only one caller left. Subsequent commits will then add full support for DATA_PAGES_PER_BLK != 1, which also means DATA_BLOCK_SIZE = DATA_PAGES_PER_BLK * PAGE_SIZE Link: https://lore.kernel.org/r/20210324195758.2021-3-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13scsi: target: tcmu: Adjust names of variables and definitionsBodo Stroesser1-17/+22
Some definitions and members of struct tcmu_dev had misleading names. Examples: - ring_size was used for the size of mailbox + cmd ring + data area - CMDR_SIZE was used for size of mailbox + cmd ring I added the new definition MB_CMDR_SIZE (mailbox + command ring), changed CMDR_SIZE to hold the size of the command ring only and replaced in struct tcmu_dev the member ring_size with mmap_pages, because the member is now used in tcmu_mmap() only, where we need page count, not size. I also added the new struct tcmu_dev member 'cmdr' which is used to replace some occurences of '(void *)mb + CMDR_OFF' with 'udev->cmdr' for better readability. Link: https://lore.kernel.org/r/20210324195758.2021-2-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13Merge branch '5.12/scsi-fixes' into 5.13/scsi-stagingMartin K. Petersen1-2/+2
Resolve a couple of conflicts between the 5.12 fixes branch and the 5.13 staging tree (iSCSI target and UFS). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-06block: stop calling blk_queue_bounce for passthrough requestsChristoph Hellwig1-2/+2
Instead of overloading the passthrough fast path with the deprecated block layer bounce buffering let the users that combine an old undermaintained driver with a highmem system pay the price by always falling back to copies in that case. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20210331073001.46776-9-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-04-06scsi: target: Make the virtual LUN 0 deviceKonstantin Shelekhin2-6/+2
Create the device for the virtual LUN 0 using the DUMMY flag. This change makes it possible to remove some special-casing in the INQUIRY code. Link: https://lore.kernel.org/r/20210322200938.53300-3-k.shelekhin@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-06scsi: target: Add the DUMMY flag to rd_mcpKonstantin Shelekhin2-4/+24
This commit adds the DUMMY flag to the rd_mcp backend that forces a logical unit to report itself as not connected device of an unknown type. Essentially this allows users to create devices identical to the device for the virtual LUN 0, making it possible to explicitly create a LUN 0 device and configure its WWNs (e.g. vendor or product name). Link: https://lore.kernel.org/r/20210322200938.53300-2-k.shelekhin@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-06scsi: target: iscsi: Fix zero tag inside a trace eventRoman Bolshakov1-2/+1
target_sequencer_start event is triggered inside target_cmd_init_cdb(). se_cmd.tag is not initialized with ITT at the moment so the event always prints zero tag. Link: https://lore.kernel.org/r/20210403215415.95077-1-r.bolshakov@yadro.com Cc: stable@vger.kernel.org # 5.10+ Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-06Merge branch '5.12/scsi-fixes' into 5.13/scsi-stagingMartin K. Petersen1-1/+8
Pull 5.12/scsi-fixes into the 5.13 SCSI tree to provide a baseline for some UFS changes that would otherwise cause conflicts during the merge. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-25scsi: target: pscsi: Clean up after failure in pscsi_map_sg()Martin Wilck1-0/+8
If pscsi_map_sg() fails, make sure to drop references to already allocated bios. Link: https://lore.kernel.org/r/20210323212431.15306-2-mwilck@suse.com Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Martin Wilck <mwilck@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-25scsi: target: pscsi: Avoid OOM in pscsi_map_sg()Martin Wilck1-1/+0
pscsi_map_sg() uses the variable nr_pages as a hint for bio_kmalloc() how many vector elements to allocate. If nr_pages is < BIO_MAX_PAGES, it will be reset to 0 after successful allocation of the bio. If bio_add_pc_page() fails later for whatever reason, pscsi_map_sg() tries to allocate another bio, passing nr_vecs = 0. This causes bio_add_pc_page() to fail immediately in the next call. pci_map_sg() continues to allocate zero-length bios until memory is exhausted and the kernel crashes with OOM. This can be easily observed by exporting a SATA DVD drive via pscsi. The target crashes as soon as the client tries to access the DVD LUN. In the case I analyzed, bio_add_pc_page() would fail because the DVD device's max_sectors_kb (128) was exceeded. Avoid this by simply not resetting nr_pages to 0 after allocating the bio. This way, the client receives an I/O error when it tries to send requests exceeding the devices max_sectors_kb, and eventually gets it right. The client must still limit max_sectors_kb e.g. by an udev rule if (like in my case) the driver doesn't report valid block limits, otherwise it encounters I/O errors. Link: https://lore.kernel.org/r/20210323212431.15306-1-mwilck@suse.com Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Martin Wilck <mwilck@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-19scsi: target: Fix htmldocs warning in target_submit_prep()Mike Christie1-0/+1
Fix warning: drivers/target/target_core_transport.c:1661: WARNING: Block quote ends without a blank line; unexpected unindent. Link: https://lore.kernel.org/r/20210318225858.11863-1-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-16scsi: target: tcmu: Adjust parameter in call to tcmu_blocks_release()Bodo Stroesser1-1/+1
In commit f7c89771d07d ("scsi: target: tcmu: Replace radix_tree with XArray") the meaning of last parameter of tcmu_blocks_release() was changed. So in the callers we should subtract 1 from the previous parameter. Unfortunately that change got lost at one of the two places where tcmu_blocks_release() is called. That does not lead to any problems, but we should adjust it anyway. Link: https://lore.kernel.org/r/20210310184458.10741-1-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: core: file: Don't duplicate memset(0xff)Chaitanya Kulkarni1-2/+1
The function fd_do_prot_fill() is called from two callers fd_do_prot_unmap() and fd_format_prot(). Both callers initialize the passed buffer to 0xff with memset(). Move the memset() call to fd_do_prot_fill() to avoid duplication. Link: https://lore.kernel.org/r/20210228055645.22253-24-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: core: pr: Initialize arrays at declaration timeChaitanya Kulkarni1-23/+13
Avoids calling memset(). Link: https://lore.kernel.org/r/20210228055645.22253-21-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-22-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-23-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: configfs: Initialize arrays at declaration timeChaitanya Kulkarni1-18/+7
Avoids calling memset(). Link: https://lore.kernel.org/r/20210228055645.22253-14-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-15-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-16-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-17-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-18-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-19-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-20-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iscsi: Initialize arrays at declaration timeChaitanya Kulkarni1-2/+1
Avoids calling memset(). Link: https://lore.kernel.org/r/20210228055645.22253-13-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iscsi: Remove unused macro PRINT_BUFChaitanya Kulkarni1-17/+0
Remove unused macro to fix the following compilation warning: drivers/target//iscsi/iscsi_target_util.c:31: warning: macro "PRINT_BUFF" is not used [-Wunused-macros] #define PRINT_BUFF(buff, len) \ Link: https://lore.kernel.org/r/20210228055645.22253-12-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iscsi: Remove unused macro TEXT_LENChaitanya Kulkarni1-1/+0
Remove unused macro to fix the following compilation warning: drivers/target//iscsi/iscsi_target_nego.c:31: warning: macro "TEXT_LEN" is not used [-Wunused-macros] #define TEXT_LEN 4096 Link: https://lore.kernel.org/r/20210228055645.22253-11-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iscsi: Remove unused macro ISCSI_INST_LAST_FAILURE_TYPEChaitanya Kulkarni1-1/+0
Remove unused macro to fix the following compilation warning: drivers/target//iscsi/iscsi_target_stat.c:31: warning: macro "ISCSI_INST_LAST_FAILURE_TYPE" is not used [-Wunused-macros] #define ISCSI_INST_LAST_FAILURE_TYPE 0 Link: https://lore.kernel.org/r/20210228055645.22253-10-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: core: Remove unused macros NONE and ISPRINTChaitanya Kulkarni1-3/+0
Remove the unuseds macro to fix the following compilation warnings: drivers/target//target_core_stat.c:34: warning: macro "NONE" is not used [-Wunused-macros] #define NONE "None" drivers/target//iscsi/iscsi_target_stat.c:36: warning: macro "ISPRINT" is not used [-Wunused-macros] #define ISPRINT(a) ((a >= ' ') && (a <= '~')) Link: https://lore.kernel.org/r/20210228055645.22253-8-chaitanya.kulkarni@wdc.com Link: https://lore.kernel.org/r/20210228055645.22253-9-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: core: Get rid of warning in compare_and_write_do_cmp()Chaitanya Kulkarni1-2/+2
Rename function local variable i to sg_cnt so we can get rid of the shadow variable compilation warning: unsigned int i; ^ int i; ^ Link: https://lore.kernel.org/r/20210228055645.22253-6-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: pscsi: Remove unused macro ISPRINTChaitanya Kulkarni1-2/+0
Remove unused macro to fix the following compilation warning: drivers/target//target_core_pscsi.c:37: warning: macro "ISPRINT" is not used [-Wunused-macros] #define ISPRINT(a) ((a >= ' ') && (a <= '~')) Link: https://lore.kernel.org/r/20210228055645.22253-7-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: pscsi: Fix warning in pscsi_complete_cmd()Chaitanya Kulkarni1-1/+2
This fixes a compilation warning in pscsi_complete_cmd(): drivers/target/target_core_pscsi.c: In function ‘pscsi_complete_cmd’: drivers/target/target_core_pscsi.c:624:5: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body] ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ Link: https://lore.kernel.org/r/20210228055645.22253-5-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iblock: Fix type of logs_per_physChaitanya Kulkarni1-1/+1
According to ilog2() it expects 32/64 bit unsigned value. "  147  * ilog2 - log base 2 of 32-bit or a 64-bit unsigned value" Replace type of logs_per_phys from int to unsigned int. Link: https://lore.kernel.org/r/20210228055645.22253-4-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iblock: Trim line longer than 80 charactersChaitanya Kulkarni1-1/+2
Trim the line that is longer than 80 characters, which is inconsistent with the rest of the code. Link: https://lore.kernel.org/r/20210228055645.22253-3-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: iblock: Remove an extra argumentChaitanya Kulkarni1-17/+17
The two arguments to the functions op and opf which are REQ_OP_XXX and REQ_XXX flags belong to the two different namespaces, i.e. they can be combined safely given that REQ_OP_XXX takes 8 bits of the flags and rest is available to REQ_XXX flags. Replace op and op_flag arguments with opf. Link: https://lore.kernel.org/r/20210228055645.22253-2-chaitanya.kulkarni@wdc.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: tcmu: Use GFP_NOIO while handling cmds or holding cmdr_lockBodo Stroesser1-2/+2
Especially when using tcmu with tcm_loop, memory allocations with GFP_KERNEL for a LUN can cause write back to the same LUN. So we have to use GFP_NOIO when allocation is done while handling commands or while holding cmdr_lock. Link: https://lore.kernel.org/r/20210305190009.32242-1-bostroesser@gmail.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: tcmu: Replace radix_tree with XArrayBodo Stroesser1-18/+16
An attempt from Matthew Wilcox to replace radix-tree usage by XArray in tcmu more than 1 year ago unfortunately got lost. I rebased that work on latest tcmu and tested it. Link: https://lore.kernel.org/r/20210224185335.13844-3-bostroesser@gmail.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-10scsi: target: tcmu: Replace IDR by XArrayBodo Stroesser1-15/+15
An attempt from Matthew Wilcox to replace IDR usage by XArray in tcmu more than 1 year ago unfortunately got lost. I rebased that work on latest tcmu and tested it. Link: https://lore.kernel.org/r/20210224185335.13844-2-bostroesser@gmail.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: core: Make completion affinity configurableMike Christie3-2/+68
It may not always be best to complete the IO on same CPU as it was submitted on. This commit allows userspace to configure it. This has been useful for vhost-scsi where we have a single thread for submissions and completions. If we force the completion on the submission CPU we may be adding conflicts with what the user has setup in the lower levels with settings like the block layer rq_affinity or the driver's IRQ or softirq (the network's rps_cpus value) settings. We may also want to set it up where the vhost thread runs on CPU N and does its submissions/completions there, and then have LIO do its completion booking on CPU M, but can't configure the lower levels due to issues like using dm-multipath with lots of paths (the path selector can throw commands all over the system because it's only taking into account latency/throughput at its level). The new setting is in: /sys/kernel/config/target/$fabric/$target/param/cmd_completion_affinity Writing: -1 -> Gives the current default behavior of completing on the submission CPU. -2 -> Completes the cmd on the CPU the lower layers sent it to us from. > 0 -> Completes on the CPU userspace has specified. Link: https://lore.kernel.org/r/20210227170006.5077-26-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: core: Flush submission work during TMR processingMike Christie1-0/+4
If a cmd is on the submission workqueue then the TMR code will miss it, and end up returning task not found or success for LUN resets. The fabric driver might then tell the initiator that the running cmds have been handled when they are about to run. This adds a flush when we are processing TMRs to make sure queued cmds do not run after returning the TMR response. Link: https://lore.kernel.org/r/20210227170006.5077-25-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: tcmu: Add backend plug/unplug calloutsMike Christie1-2/+25
This patch adds plug/unplug callouts for tcmu, so we can avoid the number of times we switch to userspace. Using this driver with tcm_loop is a common config, and dependng on the nr_hw_queues (nr_hw_queues=1 performs much better) and fio jobs (lower num jobs around 4) this patch can increase IOPS by only around 5-10% because we hit other issues like the big per tcmu device mutex. Link: https://lore.kernel.org/r/20210227170006.5077-24-michael.christie@oracle.com Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: iblock: Add backend plug/unplug calloutsMike Christie2-1/+53
This patch adds plug/unplug callouts for iblock. For an initiator driver like iSCSI which wants to pass multiple cmds to its xmit thread instead of one cmd at a time, this increases IOPS by around 10% with vhost-scsi (combined with the last patches we can see a total 40-50% increase). For driver combos like tcm_loop and faster drivers like the iSER initiator, we can still see IOPS increase by 20-30% when tcm_loop's nr_hw_queues setting is also increased. Link: https://lore.kernel.org/r/20210227170006.5077-23-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: core: Fix backend pluggingMike Christie1-1/+42
target_core_iblock is plugging and unplugging on every command and this is causing perf issues for drivers that prefer batched cmds. With recent patches we can now take multiple cmds from a fabric driver queue and then pass them down the backend drivers in a batch. This patch adds this support by adding 2 callouts to the backend for plugging and unplugging the device. Subsequent commits will add support for iblock and tcmu device plugging. Link: https://lore.kernel.org/r/20210227170006.5077-22-michael.christie@oracle.com Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: tcm_loop: Use LIO wq cmd submission helperMike Christie2-17/+6
Convert loop to use the LIO wq cmd submission helper. Link: https://lore.kernel.org/r/20210227170006.5077-20-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: tcm_loop: Use block cmd allocator for se_cmdsMike Christie1-11/+8
Make tcm_loop use the block layer cmd allocator for se_cmds instead of using the tcm_loop_cmd_cache. In the future when we can use the host tags for internal requests like TMFs we can completely kill the tcm_loop_cmd_cache. Link: https://lore.kernel.org/r/20210227170006.5077-19-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: core: Add workqueue based cmd submissionMike Christie3-3/+50
loop and vhost/scsi do their target cmd submission from driver workqueues. This allows them to avoid an issue where the backend may block waiting for resources like tags/requests, mem/locks, etc and that ends up blocking their entire submission path and for the case of vhost-scsi both the submission and completion path. This patch adds a helper drivers can use to submit from a LIO workqueue. This code will then be extended in the next patches to fix the plugging of backend devices. We are only converting vhost/loop initially, but the workqueue based submission will work for other drivers and have similar benefits where the main target loops will not end up blocking one some backend resource. Link: https://lore.kernel.org/r/20210227170006.5077-17-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: core: Add gfp_t arg to target_cmd_init_cdb()Mike Christie5-10/+14
tcm_loop could be used like a normal block device, so we can't use GFP_KERNEL and should use GFP_NOIO. This adds a gfp_t arg to target_cmd_init_cdb() and converts the users. For every driver but loop GFP_KERNEL is kept. This will also be useful in subsequent patches where loop needs to do target_submit_prep() from interrupt context to get a ref to the se_device, and so it will need to use GFP_ATOMIC. Link: https://lore.kernel.org/r/20210227170006.5077-16-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: core: Remove target_submit_cmd_map_sgls()Mike Christie1-59/+17
Convert target_submit_cmd() to do its own calls and then remove target_submit_cmd_map_sgls() since no one uses it. Link: https://lore.kernel.org/r/20210227170006.5077-15-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-05scsi: target: tcm_fc: Convert to new submission APIMike Christie1-4/+10
target_submit_cmd() is now only for simple drivers that do their own sync during shutdown and do not use target_stop_session(). tcm_fc uses target_stop_session() to sync session shutdown with LIO core, so we use target_init_cmd(), target_submit_prep(), target_submit(), because target_init_cmd() will now detect the target_stop_session() call and return an error. Link: https://lore.kernel.org/r/20210227170006.5077-14-michael.christie@oracle.com Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-24 01:49:27 +0300