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2021-07-28scsi: scsi_ioctl: Move the "block layer" SCSI ioctl handling to drivers/scsiChristoph Hellwig1-796/+0
Merge the ioctl handling in block/scsi_ioctl.c into its only caller in drivers/scsi/scsi_ioctl.c. Link: https://lore.kernel.org/r/20210724072033.1284840-19-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: scsi_ioctl: Simplify SCSI passthrough permission checkingChristoph Hellwig1-120/+99
Remove the separate command filter structure and just use a switch statement (which also cought two duplicate commands), return a bool and give the function a sensible name. Link: https://lore.kernel.org/r/20210724072033.1284840-18-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: scsi_ioctl: Move scsi_command_size_tbl to scsi_common.cChristoph Hellwig1-8/+0
Move the SCSI command size table to common SCSI code. Link: https://lore.kernel.org/r/20210724072033.1284840-17-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: scsi_ioctl: Remove scsi_req_init()Christoph Hellwig1-15/+0
Merge scsi_req_init() into its only caller. Link: https://lore.kernel.org/r/20210724072033.1284840-16-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: bsg: Decouple from scsi_cmd_ioctl()Christoph Hellwig1-16/+0
Decouple bsg from scsi_cmd_ioctl(). This requires a small amount of code duplication, but will allow moving all SCSI ioctl handling into SCSI midlayer. Link: https://lore.kernel.org/r/20210724072033.1284840-14-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: block: Add a queue_max_bytes() helperChristoph Hellwig1-11/+2
Return the max_sectors value in bytes. Lifted from scsi_ioctl.c. Link: https://lore.kernel.org/r/20210724072033.1284840-13-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: scsi_ioctl: Remove scsi_verify_blk_ioctl()Christoph Hellwig1-12/+0
Manually verify that the device is not a partition and the caller has admin privŃ–leges at the beginning of the sr ioctl method and open code the trivial check for sd as well. Link: https://lore.kernel.org/r/20210724072033.1284840-11-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-28scsi: scsi_ioctl: Remove scsi_cmd_blk_ioctl()Christoph Hellwig1-13/+0
Open code scsi_cmd_blk_ioctl() in its two callers. Link: https://lore.kernel.org/r/20210724072033.1284840-10-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-07-09Merge tag 'block-5.14-2021-07-08' of git://git.kernel.dk/linux-blockLinus Torvalds1-3/+3
Pull more block updates from Jens Axboe: "A combination of changes that ended up depending on both the driver and core branch (and/or the IDE removal), and a few late arriving fixes. In detail: - Fix io ticks wrap-around issue (Chunguang) - nvme-tcp sock locking fix (Maurizio) - s390-dasd fixes (Kees, Christoph) - blk_execute_rq polling support (Keith) - blk-cgroup RCU iteration fix (Yu) - nbd backend ID addition (Prasanna) - Partition deletion fix (Yufen) - Use blk_mq_alloc_disk for mmc, mtip32xx, ubd (Christoph) - Removal of now dead block request types due to IDE removal (Christoph) - Loop probing and control device cleanups (Christoph) - Device uevent fix (Christoph) - Misc cleanups/fixes (Tetsuo, Christoph)" * tag 'block-5.14-2021-07-08' of git://git.kernel.dk/linux-block: (34 commits) blk-cgroup: prevent rcu_sched detected stalls warnings while iterating blkgs block: fix the problem of io_ticks becoming smaller nvme-tcp: can't set sk_user_data without write_lock loop: remove unused variable in loop_set_status() block: remove the bdgrab in blk_drop_partitions block: grab a device refcount in disk_uevent s390/dasd: Avoid field over-reading memcpy() dasd: unexport dasd_set_target_state block: check disk exist before trying to add partition ubd: remove dead code in ubd_setup_common nvme: use return value from blk_execute_rq() block: return errors from blk_execute_rq() nvme: use blk_execute_rq() for passthrough commands block: support polling through blk_execute_rq block: remove REQ_OP_SCSI_{IN,OUT} block: mark blk_mq_init_queue_data static loop: rewrite loop_exit using idr_for_each_entry loop: split loop_lookup loop: don't allow deleting an unspecified loop device loop: move loop_ctl_mutex locking into loop_add ...
2021-06-30block: remove REQ_OP_SCSI_{IN,OUT}Christoph Hellwig1-3/+3
With the legacy IDE driver gone drivers now use either REQ_OP_DRV_* or REQ_OP_SCSI_*, so unify the two concepts of passthrough requests into a single one. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-05-31scsi: core: Drop message byte helperHannes Reinecke1-1/+1
The message byte is now unused, so we can drop the helper to set the message byte and the check for message bytes during error recovery. Link: https://lore.kernel.org/r/20210427083046.31620-38-hare@suse.de Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-05-31scsi: core: Drop the now obsolete driver_byte definitionsHannes Reinecke1-1/+1
The driver_byte field in the result is now unused, so we can drop the definitions. Link: https://lore.kernel.org/r/20210427083046.31620-15-hare@suse.de Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-05-31scsi: core: Kill DRIVER_SENSEHannes Reinecke1-0/+2
Replace the check for DRIVER_SENSE with a check for scsi_status_is_check_condition(). Audit all callsites to ensure the SAM status is set correctly. For backwards compability move the DRIVER_SENSE definition to sg.h, and update sg, bsg, and scsi_ioctl to set the DRIVER_SENSE driver_status whenever SAM_STAT_CHECK_CONDITION is present. [mkp: fix zeroday srp warning] Link: https://lore.kernel.org/r/20210427083046.31620-10-hare@suse.de Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> fix
2021-05-31scsi: scsi_ioctl: Return error code when blk_rq_map_kern() failsHannes Reinecke1-3/+4
The callers of sg_scsi_ioctl() already check for negative return values, so we can drop the usage of DRIVER_ERROR and return the error from blk_rq_map_kern() instead. Link: https://lore.kernel.org/r/20210427083046.31620-3-hare@suse.de Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-04-13block: Remove an obsolete comment from sg_io()Bart Van Assche1-4/+0
Commit b7819b925918 ("block: remove the blk_execute_rq return value") changed the return type of blk_execute_rq() from int into void. That change made a comment in sg_io() obsolete. Hence remove that comment. Cc: Christoph Hellwig <hch@lst.de> Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Link: https://lore.kernel.org/r/20210413034142.23460-1-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-04-06block: remove BLK_BOUNCE_ISA supportChristoph Hellwig1-1/+1
Remove the BLK_BOUNCE_ISA support now that all users are gone. 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/20210331073001.46776-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-24block: remove unnecessary argument from blk_execute_rqGuoqing Jiang1-3/+3
We can remove 'q' from blk_execute_rq as well after the previous change in blk_execute_rq_nowait. And more importantly it never really was needed to start with given that we can trivial derive it from struct request. Cc: linux-scsi@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Cc: linux-ide@vger.kernel.org Cc: linux-mmc@vger.kernel.org Cc: linux-nvme@lists.infradead.org Cc: linux-nfs@vger.kernel.org Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-13Merge tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-blockLinus Torvalds1-3/+3
Pull block driver updates from Jens Axboe: "Here are the driver updates for 5.10. A few SCSI updates in here too, in coordination with Martin as they depend on core block changes for the shared tag bitmap. This contains: - NVMe pull requests via Christoph: - fix keep alive timer modification (Amit Engel) - order the PCI ID list more sensibly (Andy Shevchenko) - cleanup the open by controller helper (Chaitanya Kulkarni) - use an xarray for the CSE log lookup (Chaitanya Kulkarni) - support ZNS in nvmet passthrough mode (Chaitanya Kulkarni) - fix nvme_ns_report_zones (Christoph Hellwig) - add a sanity check to nvmet-fc (James Smart) - fix interrupt allocation when too many polled queues are specified (Jeffle Xu) - small nvmet-tcp optimization (Mark Wunderlich) - fix a controller refcount leak on init failure (Chaitanya Kulkarni) - misc cleanups (Chaitanya Kulkarni) - major refactoring of the scanning code (Christoph Hellwig) - MD updates via Song: - Bug fixes in bitmap code, from Zhao Heming - Fix a work queue check, from Guoqing Jiang - Fix raid5 oops with reshape, from Song Liu - Clean up unused code, from Jason Yan - Discard improvements, from Xiao Ni - raid5/6 page offset support, from Yufen Yu - Shared tag bitmap for SCSI/hisi_sas/null_blk (John, Kashyap, Hannes) - null_blk open/active zone limit support (Niklas) - Set of bcache updates (Coly, Dongsheng, Qinglang)" * tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (78 commits) md/raid5: fix oops during stripe resizing md/bitmap: fix memory leak of temporary bitmap md: fix the checking of wrong work queue md/bitmap: md_bitmap_get_counter returns wrong blocks md/bitmap: md_bitmap_read_sb uses wrong bitmap blocks md/raid0: remove unused function is_io_in_chunk_boundary() nvme-core: remove extra condition for vwc nvme-core: remove extra variable nvme: remove nvme_identify_ns_list nvme: refactor nvme_validate_ns nvme: move nvme_validate_ns nvme: query namespace identifiers before adding the namespace nvme: revalidate zone bitmaps in nvme_update_ns_info nvme: remove nvme_update_formats nvme: update the known admin effects nvme: set the queue limits in nvme_update_ns_info nvme: remove the 0 lba_shift check in nvme_update_ns_info nvme: clean up the check for too large logic block sizes nvme: freeze the queue over ->lba_shift updates nvme: factor out a nvme_configure_metadata helper ...
2020-10-13Merge tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-blockLinus Torvalds1-3/+1
Pull block updates from Jens Axboe: - Series of merge handling cleanups (Baolin, Christoph) - Series of blk-throttle fixes and cleanups (Baolin) - Series cleaning up BDI, seperating the block device from the backing_dev_info (Christoph) - Removal of bdget() as a generic API (Christoph) - Removal of blkdev_get() as a generic API (Christoph) - Cleanup of is-partition checks (Christoph) - Series reworking disk revalidation (Christoph) - Series cleaning up bio flags (Christoph) - bio crypt fixes (Eric) - IO stats inflight tweak (Gabriel) - blk-mq tags fixes (Hannes) - Buffer invalidation fixes (Jan) - Allow soft limits for zone append (Johannes) - Shared tag set improvements (John, Kashyap) - Allow IOPRIO_CLASS_RT for CAP_SYS_NICE (Khazhismel) - DM no-wait support (Mike, Konstantin) - Request allocation improvements (Ming) - Allow md/dm/bcache to use IO stat helpers (Song) - Series improving blk-iocost (Tejun) - Various cleanups (Geert, Damien, Danny, Julia, Tetsuo, Tian, Wang, Xianting, Yang, Yufen, yangerkun) * tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (191 commits) block: fix uapi blkzoned.h comments blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue blk-mq: get rid of the dead flush handle code path block: get rid of unnecessary local variable block: fix comment and add lockdep assert blk-mq: use helper function to test hw stopped block: use helper function to test queue register block: remove redundant mq check block: invoke blk_mq_exit_sched no matter whether have .exit_sched percpu_ref: don't refer to ref->data if it isn't allocated block: ratelimit handle_bad_sector() message blk-throttle: Re-use the throtl_set_slice_end() blk-throttle: Open code __throtl_de/enqueue_tg() blk-throttle: Move service tree validation out of the throtl_rb_first() blk-throttle: Move the list operation after list validation blk-throttle: Fix IO hang for a corner case blk-throttle: Avoid tracking latency if low limit is invalid blk-throttle: Avoid getting the current time if tg->last_finish_time is 0 blk-throttle: Remove a meaningless parameter for throtl_downgrade_state() block: Remove redundant 'return' statement ...
2020-10-12Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-10/+2
Pull compat iovec cleanups from Al Viro: "Christoph's series around import_iovec() and compat variant thereof" * 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: security/keys: remove compat_keyctl_instantiate_key_iov mm: remove compat_process_vm_{readv,writev} fs: remove compat_sys_vmsplice fs: remove the compat readv/writev syscalls fs: remove various compat readv/writev helpers iov_iter: transparently handle compat iovecs in import_iovec iov_iter: refactor rw_copy_check_uvector and import_iovec iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c compat.h: fix a spelling error in <linux/compat.h>
2020-10-03iov_iter: transparently handle compat iovecs in import_iovecChristoph Hellwig1-10/+2
Use in compat_syscall to import either native or the compat iovecs, and remove the now superflous compat_import_iovec. This removes the need for special compat logic in most callers, and the remaining ones can still be simplified by using __import_iovec with a bool compat parameter. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-10-02block: scsi_ioctl: Avoid the use of one-element arraysGustavo A. R. Silva1-3/+3
One-element arrays are being deprecated[1]. Replace the one-element array with a simple object of type compat_caddr_t: 'compat_caddr_t unused'[2], once it seems this field is actually never used. Also, update struct cdrom_generic_command in UAPI by adding an anonimous union to avoid using the one-element array _reserved_. [1] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arrays [2] https://github.com/KSPP/linux/issues/86 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/lkml/5f76f5d0.qJ4t%2FHWuRzSW7bTa%25lkp@intel.com/ Build-tested-by: kernel test robot <lkp@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-02block/scsi-ioctl: Fix kernel-infoleak in scsi_put_cdrom_generic_arg()Peilin Ye1-0/+1
scsi_put_cdrom_generic_arg() is copying uninitialized stack memory to userspace, since the compiler may leave a 3-byte hole in the middle of `cgc32`. Fix it by adding a padding field to `struct compat_cdrom_generic_command`. Cc: stable@vger.kernel.org Fixes: f3ee6e63a9df ("compat_ioctl: move CDROM_SEND_PACKET handling into scsi") Suggested-by: Dan Carpenter <dan.carpenter@oracle.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Reported-by: syzbot+85433a479a646a064ab3@syzkaller.appspotmail.com Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-25block: add a bdev_is_partition helperChristoph Hellwig1-1/+1
Add a littler helper to make the somewhat arcane bd_contains checks a little more obvious. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-11block: remove duplicate include statement in scsi_ioctl.cTian Tao1-2/+0
scsi/sg.h is included more than once, Remove the one that isn't necessary. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-03-16scsi: core: Allow non-root users to perform ZBC commandsRyan Attard1-0/+4
Allow users with read permissions to issue REPORT ZONE commands and users with write permissions to manage zones on block devices supporting the ZBC specification. Link: https://lore.kernel.org/r/20200226170518.92963-2-ryanattard@ryanattard.info Signed-off-by: Ryan Attard <ryanattard@ryanattard.info> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-03compat_ioctl: move CDROM_SEND_PACKET handling into scsiArnd Bergmann1-53/+132
There is only one implementation of this ioctl, so move the handling out of the common block layer code into the place where it's actually needed. It also gets called indirectly through pktcdvd, which needs to be aware of this change. As I noticed, the old implementation of the compat handler failed to convert the structure on the way out, so the updated fields never got written back to user space. This is either not important, or it has never worked and should be fixed now. Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-01-03compat: scsi: sg: fix v3 compat read/write interfaceArnd Bergmann1-28/+1
In the v5.4 merge window, a cleanup patch from Al Viro conflicted with my rework of the compat handling for sg.c read(). Linus Torvalds did a correct merge but pointed out that the resulting code is still unsatisfactory. I later noticed that the sg_new_read() function still gets the compat mode wrong, when the 'count' argument is large enough to pass a compat_sg_io_hdr object, but not a nativ sg_io_hdr. To address both of these, move the definition of compat_sg_io_hdr into a scsi/sg.h to make it visible to sg.c and rewrite the logic for reading req_pack_id as well as the size check to a simpler version that gets the expected results. Fixes: c35a5cfb4150 ("scsi: sg: sg_read(): simplify reading ->pack_id of userland sg_io_hdr_t") Fixes: 98aaaec4a150 ("compat_ioctl: reimplement SG_IO handling") Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-10-23compat_ioctl: reimplement SG_IO handlingArnd Bergmann1-4/+128
There are two code locations that implement the SG_IO ioctl: the old sg.c driver, and the generic scsi_ioctl helper that is in turn used by multiple drivers. To eradicate the old compat_ioctl conversion handler for the SG_IO command, I implement a readable pair of put_sg_io_hdr() /get_sg_io_hdr() helper functions that can be used for both compat and native mode, and then I call this from both drivers. For the iovec handling, there is already a compat_import_iovec() function that can simply be called in place of import_iovec(). To avoid having to pass the compat/native state through multiple indirections, I mark the SG_IO command itself as compatible in fs/compat_ioctl.c and use in_compat_syscall() to figure out where we are called from. As a side-effect of this, the sg.c driver now also accepts the 32-bit sg_io_hdr format in compat mode using the read/write interface, not just ioctl. This should improve compatiblity with old 32-bit binaries, but it would break if any application intentionally passes the 64-bit data structure in compat mode here. Steffen Maier helped debug an issue in an earlier version of this patch. Cc: Steffen Maier <maier@linux.ibm.com> Cc: linux-scsi@vger.kernel.org Cc: Doug Gilbert <dgilbert@interlog.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-04-30block: switch all files cleared marked as GPLv2 to SPDX tagsChristoph Hellwig1-15/+1
All these files have some form of the usual GPLv2 boilerplate. Switch them to use SPDX tags instead. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-14block: consistently use GFP_NOIO instead of __GFP_NORECLAIMChristoph Hellwig1-1/+1
Same numerical value (for now at least), but a much better documentation of intent. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-14block: sanitize blk_get_request calling conventionsChristoph Hellwig1-5/+3
Switch everyone to blk_get_request_flags, and then rename blk_get_request_flags to blk_get_request. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-10block: silently forbid sending any ioctl to a partitionPaolo Bonzini1-29/+0
After the first few months, the message has not led to many bug reports. It's been almost five years now, and in practice the main source of it seems to be MTIOCGET that someone is using to detect tape devices. While we could whitelist it just like CDROM_GET_CAPABILITY, this patch just removes the message altogether. The patch also removes the "safe but not very useful" ioctl whitelist, as suggested by Christoph. I doubt anything is using most of those ioctls _in general_, let alone on a partition. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-09block: Fix kernel-doc warnings reported when building with W=1Bart Van Assche1-2/+3
Commit 3a025e1d1c2e ("Add optional check for bad kernel-doc comments") causes W=1 the kernel-doc script to be run and thereby causes several new warnings to appear when building the kernel with W=1. Fix the block layer kernel-doc headers such that the block layer again builds cleanly with W=1. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-11-10block: pass full fmode_t to blk_verify_commandChristoph Hellwig1-4/+4
Use the obvious calling convention. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-20block: Change argument type of scsi_req_init()Bart Van Assche1-3/+7
Since scsi_req_init() works on a struct scsi_request, change the argument type into struct scsi_request *. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-20block: Make most scsi_req_init() calls implicitBart Van Assche1-3/+0
Instead of explicitly calling scsi_req_init() after blk_get_request(), call that function from inside blk_get_request(). Add an .initialize_rq_fn() callback function to the block drivers that need it. Merge the IDE .init_rq_fn() function into .initialize_rq_fn() because it is too small to keep it as a separate function. Keep the scsi_req_init() call in ide_prep_sense() because it follows a blk_rq_init() call. References: commit 82ed4db499b8 ("block: split scsi_request out of struct request") Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.com> Cc: Omar Sandoval <osandov@fb.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-04-20scsi: introduce a result field in struct scsi_requestChristoph Hellwig1-7/+7
This passes on the scsi_cmnd result field to users of passthrough requests. Currently we abuse req->errors for this purpose, but that field will go away in its current form. Note that the old IDE code abuses the errors field in very creative ways and stores all kinds of different values in it. I didn't dare to touch this magic, so the abuses are brought forward 1:1. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-20block: remove the blk_execute_rq return valueChristoph Hellwig1-1/+2
The function only returns -EIO if rq->errors is non-zero, which is not very useful and lets a large number of callers ignore the return value. Just let the callers figure out their error themselves. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-05block, scsi: move the retries field to struct scsi_requestChristoph Hellwig1-4/+4
Instead of bloating the generic struct request with it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-01-31block: fold cmd_type into the REQ_OP_ spaceChristoph Hellwig1-4/+5
Instead of keeping two levels of indirection for requests types, fold it all into the operations. The little caveat here is that previously cmd_type only applied to struct request, while the request and bio op fields were set to plain REQ_OP_READ/WRITE even for passthrough operations. Instead this patch adds new REQ_OP_* for SCSI passthrough and driver private requests, althought it has to add two for each so that we can communicate the data in/out nature of the request. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-01-27block: split scsi_request out of struct requestChristoph Hellwig1-33/+43
And require all drivers that want to support BLOCK_PC to allocate it as the first thing of their private data. To support this the legacy IDE and BSG code is switched to set cmd_size on their queues to let the block layer allocate the additional space. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds1-1/+1
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-19block: allow WRITE_SAME commands with the SG_IO ioctlMauricio Faria de Oliveira1-0/+3
The WRITE_SAME commands are not present in the blk_default_cmd_filter write_ok list, and thus are failed with -EPERM when the SG_IO ioctl() is executed without CAP_SYS_RAWIO capability (e.g., unprivileged users). [ sg_io() -> blk_fill_sghdr_rq() > blk_verify_command() -> -EPERM ] The problem can be reproduced with the sg_write_same command # sg_write_same --num 1 --xferlen 512 /dev/sda # # capsh --drop=cap_sys_rawio -- -c \ 'sg_write_same --num 1 --xferlen 512 /dev/sda' Write same: pass through os error: Operation not permitted # For comparison, the WRITE_VERIFY command does not observe this problem, since it is in that list: # capsh --drop=cap_sys_rawio -- -c \ 'sg_write_verify --num 1 --ilen 512 --lba 0 /dev/sda' # So, this patch adds the WRITE_SAME commands to the list, in order for the SG_IO ioctl to finish successfully: # capsh --drop=cap_sys_rawio -- -c \ 'sg_write_same --num 1 --xferlen 512 /dev/sda' # That case happens to be exercised by QEMU KVM guests with 'scsi-block' devices (qemu "-device scsi-block" [1], libvirt "<disk type='block' device='lun'>" [2]), which employs the SG_IO ioctl() and runs as an unprivileged user (libvirt-qemu). In that scenario, when a filesystem (e.g., ext4) performs its zero-out calls, which are translated to write-same calls in the guest kernel, and then into SG_IO ioctls to the host kernel, SCSI I/O errors may be observed in the guest: [...] sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [...] sd 0:0:0:0: [sda] tag#0 Sense Key : Aborted Command [current] [...] sd 0:0:0:0: [sda] tag#0 Add. Sense: I/O process terminated [...] sd 0:0:0:0: [sda] tag#0 CDB: Write Same(10) 41 00 01 04 e0 78 00 00 08 00 [...] blk_update_request: I/O error, dev sda, sector 17096824 Links: [1] http://git.qemu.org/?p=qemu.git;a=commit;h=336a6915bc7089fb20fea4ba99972ad9a97c5f52 [2] https://libvirt.org/formatdomain.html#elementsDisks (see 'disk' -> 'device') Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by: Brahadambal Srinivasan <latha@linux.vnet.ibm.com> Reported-by: Manjunatha H R <manjuhr1@in.ibm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-11-06mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIMMel Gorman1-3/+3
__GFP_WAIT was used to signal that the caller was in atomic context and could not sleep. Now it is possible to distinguish between true atomic context and callers that are not willing to sleep. The latter should clear __GFP_DIRECT_RECLAIM so kswapd will still wake. As clearing __GFP_WAIT behaves differently, there is a risk that people will clear the wrong flags. This patch renames __GFP_WAIT to __GFP_RECLAIM to clearly indicate what it does -- setting it allows all reclaim activity, clearing them prevents it. [akpm@linux-foundation.org: fix build] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Christoph Lameter <cl@linux.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Vitaly Wool <vitalywool@gmail.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-06-27block: fix bogus EFAULT error from SG_IO ioctlPaolo Bonzini1-2/+2
Whenever blk_fill_sghdr_rq fails, its errno code is ignored and changed to EFAULT. This can cause very confusing errors: $ sg_persist -k /dev/sda persistent reservation in: pass through os error: Bad address The fix is trivial, just propagate the return value from blk_fill_sghdr_rq. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-04-11sg_io(): use import_iovec()Al Viro1-7/+5
... and don't skip access_ok() validation. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-05block: pass iov_iter to the BLOCK_PC mapping functionsKent Overstreet1-13/+4
Make use of a new interface provided by iov_iter, backed by scatter-gather list of iovec, instead of the old interface based on sg_iovec. Also use iov_iter_advance() instead of manual iteration. This commit should contain only literal replacements, without functional changes. Cc: Christoph Hellwig <hch@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Signed-off-by: Kent Overstreet <kmo@daterainc.com> [dpark: add more description in commit message] Signed-off-by: Dongsu Park <dongsu.park@profitbricks.com> [hch: fixed to do a deep clone of the iov_iter, and to properly use the iov_iter direction] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-12-08Merge remote-tracking branch 'scsi-queue/core-for-3.19' into for-linusJames Bottomley1-1/+1
2014-11-24scsi: rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16Hannes Reinecke1-1/+1
SPC-3 defines SERVICE ACTION IN(12) and SERVICE ACTION IN(16). So rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16 to be consistent with SPC and to allow for better distinction. Signed-off-by: Hannes Reinecke <hare@suse.de> Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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