- 12 Nov, 2014 40 commits
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Christoph Hellwig authored
Remove the ordered_tags field, we haven't been issuing ordered tags based on it since the big barrier rework in 2010. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Mike Christie <michaelc@cs.wisc.edu> Reviewed-by:
Bart Van Assche <bvanassche@acm.org> Reviewed-by:
Martin K. Petersen <martin.petersen@oracle.com>
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Christoph Hellwig authored
Currently scsi piggy backs on the block layer to define the concept of a tagged command. But we want to be able to have block-level host-wide tags assigned even for untagged commands like the initial INQUIRY, so add a new SCSI-level flag for commands that are tagged at the scsi level, so that even commands without that set can have tags assigned to them. Note that this alredy is the case for the blk-mq code path, and this just lets the old path catch up with it. We also set this flag based upon sdev->simple_tags instead of the block queue flag, so that it is entirely independent of the block layer tagging, and thus always correct even if a driver doesn't use block level tagging yet. Also remove the old blk_rq_tagged; it was only used by SCSI drivers, and removing it forces them to look for the proper replacement. Signed-off-by:
Hannes Reinecke <hare@suse.de>
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Christoph Hellwig authored
Most drivers use exactly the same implementation, so provide it as a library function. Signed-off-by:
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Christoph Hellwig authored
Move all code to set up and tear down sdev->scsi_dh_data to common code. Signed-off-by:
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Christoph Hellwig authored
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Christoph Hellwig authored
All drivers now do their own matching, so there is no more need to expose a device list as part of the interface. Signed-off-by:
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Christoph Hellwig authored
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Christoph Hellwig authored
We need to grab a reference to the module before calling the attach routines to avoid a small race vs module removal. It also cleans up the code significantly as a side effect. Signed-off-by:
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Christoph Hellwig authored
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Martin K. Petersen authored
The T10 SBC UNMAP command does not provide any hard guarantees that blocks will return zeroes on a subsequent READ. This is due to the fact that the device server is free to silently ignore all or parts of the request. The only way to ensure that a block consistently returns zeroes after being unmapped is to use WRITE SAME with the UNMAP bit set. Should the device be unable to unmap one or more blocks described by the command it is required to manually write zeroes to them. Until now we have preferred UNMAP over the WRITE SAME variants to accommodate thinly provisioned devices that predated the final SBC-3 spec. This patch changes the heuristic so that we favor WRITE SAME(16) or (10) over UNMAP if these commands are marked as supported in the Logical Block Provisioning VPD page. The patch also disables discard_zeroes_data for devices operating in UNMAP mode. Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Christoph Hellwig authored
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Christoph Hellwig authored
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Christoph Hellwig authored
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Christoph Hellwig authored
No need to verify the passthrough ioctls, the real handler will take care of that. Also make sure not to block for resets on O_NONBLOCK fds. Signed-off-by:
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Christoph Hellwig authored
The calling conventions for this function are bad as it could return -ENODEV both for a device not currently online and a not recognized ioctl. Add a new scsi_ioctl_block_when_processing_errors function that wraps scsi_block_when_processing_errors with the a special case for the SG_SCSI_RESET ioctl command, and handle the SG_SCSI_RESET case itself in scsi_ioctl. All callers of scsi_ioctl now must call the above helper to check for the EH state, so that the ioctl handler itself doesn't have to. Reported-by:
Robert Elliott <Elliott@hp.com> Signed-off-by:
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Christoph Hellwig authored
Pull the common code from the two callers into the function, and rename it to scsi_ioctl_reset. Signed-off-by:
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Bart Van Assche authored
Modify scsi_find_tag() and scsi_host_find_tag() such that these functions can translate a tag generated by blk_mq_unique_tag(). Signed-off-by:
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Bart Van Assche authored
Allow a SCSI LLD to declare how many hardware queues it supports by setting Scsi_Host.nr_hw_queues before calling scsi_add_host(). Signed-off-by:
Sagi Grimberg <sagig@mellanox.com> Reviewed-by:
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Bart Van Assche authored
The queuecommand() callback functions in SCSI low-level drivers need to know which hardware context has been selected by the block layer. Since this information is not available in the request structure, and since passing the hctx pointer directly to the queuecommand callback function would require modification of all SCSI LLDs, add a function to the block layer that allows to query the hardware context index. Signed-off-by:
Jens Axboe <axboe@kernel.dk> Reviewed-by:
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Hannes Reinecke authored
There can be quite a lot of I/O error messages, even on smaller machines. So we need to ratelimit them to not overwhelm logging. Signed-off-by:
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Hannes Reinecke authored
The .eh_abort_handler needs to return SUCCESS, FAILED, or FAST_IO_FAIL. So fixup all callers to adhere to this requirement. Reviewed-by:
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Hannes Reinecke authored
scsi_try_to_abort_cmd() should only return SUCCESS, FAILED, or FAST_IO_FAIL. So document that in the function description and simplify the logging message. Signed-off-by:
Christoph Hellwig <hch@infradead.org> Reviewed-by:
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Hannes Reinecke authored
The EH statistics are per host, so we should be using shost_printk() here. Signed-off-by:
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Hannes Reinecke authored
Use the matching scope for logging messages to allow for better command tracing. Signed-off-by:
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Hannes Reinecke authored
Simplify scsi_log_(send|completion) by externalizing scsi_mlreturn_string() and always print the command address. Signed-off-by:
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Hannes Reinecke authored
Open-code scsi_print_result in sd.c, and cleanup logging to not print duplicate informations. Also remove the call to scsi_show_result() in ufshcd.c to be consistent with other callers of scsi_execute(). With that we can remove scsi_show_result in constants.c Signed-off-by:
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Hannes Reinecke authored
Export functions for later use. Signed-off-by:
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Hannes Reinecke authored
Calling scsi_print_command should not be necessary during abort; if the information is required one should enable scsi logging. Signed-off-by:
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Hannes Reinecke authored
print_opcode_name() was only ever called with a '0' argument from LLDDs and ULDs which were _not_ supporting variable length CDBs, so the 'if' clause was never triggered. Instead we should be using the last argument to specify the cdb length to avoid accidental overflow when reading the cdb buffer. Signed-off-by:
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Hannes Reinecke authored
Consolidate the CDB opcode lookup in scsi_opcode_sa_name(), so that we don't have to call several functions to figure out the CDB opcode string. Signed-off-by:
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Hannes Reinecke authored
Instead of having two versions of print_opcode_name() we should be consolidating them into one version. Signed-off-by:
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Hannes Reinecke authored
Implement a lookup array for SERVICE ACTION commands instead of hardcoding it in a large switch statement. Signed-off-by:
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Hannes Reinecke authored
Last caller is gone, so we can remove it. Signed-off-by:
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Hannes Reinecke authored
Convert scsi_normalize_sense() and friends to return 'bool' instead of an integer. Signed-off-by:
Yoshihiro Yunomae <yoshihiro.yunomae.ez@hitachi.com> Signed-off-by:
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Hannes Reinecke authored
Currently we're only decoding sense extras for tape devices. And even there only for fixed format sense formats. As this is of rather limited use in the general case we should be stop trying to decode sense extras; the tape driver does its own decoding anyway. Signed-off-by:
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Hannes Reinecke authored
If scsi_normalize_sense() fails we couldn't decode the sense buffer, and the scsi_sense_hdr fields are invalid. For those cases we should rather dump the sense buffer and not try to decode invalid fields. Signed-off-by:
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Hannes Reinecke authored
The 53c700 driver would be using scsi_print_sense() in a debug statement, which was never compiled in. Plus the same information can get retrieved with logging. So remove it. Signed-off-by:
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Hannes Reinecke authored
Update logging messages to use dev_printk() variants for correct device annotations. Signed-off-by:
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Hannes Reinecke authored
fas216 returns DID_BAD_TARGET for an incomplete data transfer. The midlayer uses DID_BAD_TARGET to signal a non-existing or not reachable target. So we should rather be using DID_ERROR here. Signed-off-by:
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Hannes Reinecke authored
Update acornscsi to use scsi_print_command() instead of the underscore version and use scmd_printk() in acornscsi_done(). This will add correct device annotations in the resulting message. And we should be using set_host_byte() for setting the final result. Signed-off-by:
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