- May 31, 2015
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Christoph Hellwig authored
Remove the unneeded fabric_ptr argument, and change the type argument to pass in a SPC protocol identifier. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org>
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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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Akinobu Mita authored
sbc_dif_generate() and sbc_dif_verify() currently assume that each SG element for data transfer memory doesn't straddle the block size boundary. However, when using SG_IO ioctl, we can choose the data transfer memory which doesn't satisfy that alignment requirement. In order to handle such cases correctly, this change inverts the outer loop to iterate data transfer memory and the inner loop to iterate protection information and enables to calculate CRC for a block which straddles multiple SG elements. Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: target-devel@vger.kernel.org Cc: linux-scsi@vger.kernel.org Signed-off-by:
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Akinobu Mita authored
This introduces crc_t10dif_update() which enables to calculate CRC for a block which straddles multiple SG elements by calling multiple times. This also converts crc_t10dif() to use crc_t10dif_update() as they are almost same. (remove extra function call in crc_t10dif() and crc_t10dif_update - Tim + Herbert) Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: target-devel@vger.kernel.org Signed-off-by:
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Akinobu Mita authored
Even if the device backend is initialized with protection info is enabled, some requests don't have the protection info attached for WRITE SAME command issued by block device helpers, WRITE command with WRPROTECT=0 by SG_IO ioctl, etc. So when TCM loopback fabric module is used, se_cmd->t_prot_sg is NULL for these requests and performing WRITE_INSERT of PI using software emulation by sbc_dif_generate() causes kernel crash. To fix this, introduce SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC for se_cmd_flags, which is used to determine that se_cmd->t_prot_sg needs to be allocated or use pre-allocated protection information by scsi mid-layer. Signed-off-by:
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Akinobu Mita authored
In sbc_dif_copy_prot(), the addresses passed to kunmap_atomic() are inconsistent with the addresses which are mapped by kmap_atomic(). That could be problematic if an SG element has its length larger than PAGE_SIZE as kunmap_atomic() will attempt to unmap different page. Signed-off-by:
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Christoph Hellwig authored
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Christoph Hellwig authored
Split out two common helpers to share code for allocating and initializing node ACLs. Signed-off-by:
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Christoph Hellwig authored
By always allocating and adding, respectively removing and freeing the se_node_acl structure in core code we can remove tons of repeated code in the init_nodeacl and drop_nodeacl routines. Additionally this now respects the get_default_queue_depth method in this code path as well. Signed-off-by:
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Christoph Hellwig authored
All fabric drivers except for iSCSI always return 1, so implement that as default behavior. Signed-off-by:
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Christoph Hellwig authored
Except for the embedded struct se_node_acl none of the fields were ever used. Signed-off-by:
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Christoph Hellwig authored
Except for the embedded struct se_node_acl none of the fields were ever used. Signed-off-by:
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Christoph Hellwig authored
Except for the embedded struct se_node_acl none of the fields were ever used. Signed-off-by:
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Christoph Hellwig authored
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Bart Van Assche authored
The first argument of these two functions is always identical to se_cmd->se_sess. Hence remove the first argument. Signed-off-by:
Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by:
Sagi Grimberg <sagig@mellanox.com> Reviewed-by:
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Ilias Tsitsimpis authored
Enable TCMU to handle bidirectional SCSI commands. In such cases, entries in iov[] cover both the Data-In and the Data-Out buffers. The first iov_cnt entries correspond to the Data-Out buffer, while the remaining iov_bidi_cnt entries correspond to the Data-In buffer. Signed-off-by:
Ilias Tsitsimpis <iliastsi@arrikto.com> Signed-off-by:
Vangelis Koukis <vkoukis@arrikto.com> Reviewed-by:
Andy Grover <agrover@redhat.com> Signed-off-by:
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Ilias Tsitsimpis authored
Introduce alloc_and_scatter_data_area()/gather_and_free_data_area() functions that allocate/deallocate space from the data area and copy data to/from a given scatter-gather list. These functions are needed so the next patch, introducing support for bidirectional commands in TCMU, can use the same code path both for t_data_sg and for t_bidi_data_sg. Signed-off-by:
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Ilias Tsitsimpis authored
Fields t_bidi_data_sg and t_bidi_data_nents are set only in the presence of BIDI commands. This means that the underlying code (for example TCMU) cannot inspect them when the SCSI command is not a BIDI one. Ensure the code always initializes these fields with the given values, even when the SCSI command is not a BIDI one. Set t_bidi_data_sg to sgl_bidi (which should be NULL for non-BIDI commands) and t_bidi_data_nents to sgl_bidi_count (which should be 0 for non-BIDI commands). This allows the underlying code to use these fields unconditionally. Signed-off-by:
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Ilias Tsitsimpis authored
Field shost->max_cmd_len is used to inform Linux / the SCSI midlayer of the maximum CDB size an LLD is capable of handling. Set this field to SCSI_MAX_VARLEN_CDB_SIZE for target, to enable support for variable-sized CDBs (0x7E). Also remove the definition of TL_SCSI_MAX_CMD_LEN since it is now redundant. Signed-off-by:
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Ilias Tsitsimpis authored
Some SCSI commands (for example the TEST UNIT READY command) do not carry data and so data_direction is DMA_NONE. Patch TCMU to not print a warning message about unknown data direction, when it is DMA_NONE. Signed-off-by:
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Christoph Hellwig authored
Drivers may override the WCE flag, in which case the DPOFUA flag in MODE SENSE might differ from the check used to reject invalid FUA bits in sbc_check_dpofua. Also now that we reject invalid FUA bits early there is no need to duplicate the same buggy check down in the fileio code. As the DPOFUA flag controls th support for FUA bits on read and write commands as well as DPO key off all the checks off a single helper, and deprecate the emulate_dpo and emulate_fua_read attributs. This fixes various failures in the libiscsi testsuite. Personally I'd prefer to also remove the emulate_fua_write attribute as there is no good reason to disable it, but I'll leave that for a separate discussion. Signed-off-by:
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Christophe Vu-Brugier authored
Support for markers is currently broken because of a bug in iscsi_enforce_integrity_rules(): the "IFMarkInt_Reject" and "OFMarkInt_Reject" variables are always equal to 1 in iscsi_enforce_integrity_rules(). Moreover, fixed interval markers keys (IFMarker, OFMarker, IFMarkInt and OFMarkInt) are obsolete according to iSCSI RFC 7143: >From http://tools.ietf.org/html/rfc7143#section-13.25 : 13.25. Obsoleted Keys This document obsoletes the following keys defined in [RFC3720]: IFMarker, OFMarker, OFMarkInt, and IFMarkInt. However, iSCSI implementations compliant to this document may still receive these obsoleted keys -- i.e., in a responder role -- in a text negotiation. When an IFMarker or OFMarker key is received, a compliant iSCSI implementation SHOULD respond with the constant "Reject" value. The implementation MAY alternatively respond with a "No" value. However, the implementation MUST NOT respond with a "NotUnderstood" value for either of these keys. When an IFMarkInt or OFMarkInt key is received, a compliant iSCSI implementation MUST respond with the constant "Reject" value. The implementation MUST NOT respond with a "NotUnderstood" value for either of these keys. This patch disables markers by turning the corresponding parameters to read-only. The default value of IFMarker and OFMarker remains "No" but the user cannot change it to "Yes" anymore. The new value of IFMarkInt and OFMarkInt is "Reject". (Drop left-over iscsi_get_value_from_number_range + make configfs parameters attrs R/W nops - nab) Signed-off-by:
Christophe Vu-Brugier <cvubrugier@fastmail.fm> Signed-off-by:
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Sagi Grimberg authored
Fix map/unmap consistency and get rid of a redundant local variable psg. Reported-by:
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Sagi Grimberg authored
The reason this bounce buffer exists is to allow code reuse between rd_mcp and fileio in DIF mode. But the fact is, that this bounce is really not needed at all, we can simply call sbc_dif_verify on cmd->t_prot_sg and use it for file IO. This also removes fd_do_prot_rw as fd_do_rw was generalised to receive file pointer, block size (8 bytes for DIF data) and total data length. (Fix apply breakage from commit c8367778 - nab) Tested-by:
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Sagi Grimberg authored
Instead of providing DIF verify routines for read/write that are almost identical and conditionally copy protection information, just let the caller do the right thing. Have a single sbc_dif_verify that handles an sgl (that does NOT copy any data) and a protection information copy routine used by rd_mcp and fileio backend. In the WRITE case, call sbc_dif_verify with cmd->t_prot_sg and then do the copy from it to local sgl (assuming the verify succeeded of course). In the READ case, call sbc_dif_verify with the local sgl and if it succeeds, copy it to t_prot_sg (or not if we are stripping it). (Fix apply breakage from commit c8367778 - nab) Tested-by:
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Roland Dreier authored
We don't assign pi_ctx to desc->pi_ctx until we're certain to succeed in the function. That means the cleanup path should use the local pi_ctx variable, not desc->pi_ctx. This was detected by Coverity (CID 1260062). Signed-off-by:
Roland Dreier <roland@purestorage.com> Signed-off-by:
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Andy Grover authored
It seems like we only care if a transport is passthrough or not. Convert transport_type to a flags field and replace TRANSPORT_PLUGIN_* with a flag, TRANSPORT_FLAG_PASSTHROUGH. Signed-off-by:
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Andy Grover authored
Aside from whether they handle BIDI ops or not, parsing of the CDB by kernel and user SCSI passthrough modules should be identical. Move this into a new passthrough_parse_cdb() and call it from tcm-pscsi and tcm-user. Reported-by:
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Andy Grover authored
After much discussion, give up on only passing a subset of SCSI commands to userspace and pass them all. Based on what pscsi is doing, make sure to set SCF_SCSI_DATA_CDB for I/O ops, and define attributes identical to pscsi. Make hw_block_size configurable via dev param. Remove mention of command filtering from tcmu-design.txt. Signed-off-by:
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Andy Grover authored
We now require that the userspace handler set a bit if the command is not handled. Update calls to tcmu_hdr_get_op for v2. Signed-off-by:
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Andy Grover authored
See https://bugzilla.redhat.com/show_bug.cgi?id=1025672 We need to put() the reference to the scsi host that we got in pscsi_configure_device(). In VIRTUAL_HOST mode it is associated with the dev_virt, not the hba_virt. Signed-off-by:
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Christoph Hellwig authored
There is just one configfs subsystem in the target code, so we might as well add two helpers to reference / unreference it from the core code instead of passing pointers to it around. This fixes a regression introduced for v4.1-rc1 with commit 9ac8928e , where configfs_depend_item() callers using se_tpg_tfo->tf_subsys would fail, because the assignment from the original target_core_subsystem[] is no longer happening at target_register_template() time. (Fix target_core_exit_configfs pointer dereference - Sagi) Signed-off-by:
Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by:
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- May 20, 2015
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Nicholas Bellinger authored
Once upon a time, iscsit_get_tpg() was using an un-interruptible lock. The signal_pending() usage was a check to allow userspace to break out of the operation with SIGINT. AFAICT, there's no reason why this is necessary anymore, and as reported by Alexey can be potentially dangerous. Also, go ahead and drop the other two problematic cases within iscsit_access_np() and sbc_compare_and_write() as well. Found by Linux Driver Verification project (linuxtesting.org). Reported-by:
Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by:
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- May 15, 2015
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Bart Van Assche authored
Code like " &= ~CMD_T_BUSY | ..." only clears CMD_T_BUSY but not the other flag. Modify these statements such that both flags are cleared. (Fix fuzz for target_write_prot_action code in mainline - nab) Signed-off-by:
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Bart Van Assche authored
The function transport_complete_qf() must call either queue_data_in() or queue_status() but not both. Signed-off-by:
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- May 03, 2015
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Andy Grover authored
TCMU requires more work to correctly handle both user handlers that want all SCSI commands (pass_level=0) for a se_device, and also handlers that just want I/O commands and let the others be emulated by the kernel (pass_level=1). Only support the latter for now. For full passthrough, we will need to support a second se_subsystem_api template, due to configfs attributes being different between the two modes. Thus pass_level is extraneous, and we can remove it. The ABI break for TCMU v2 is already applied for this release, so it's best to do this now to avoid another ABI break in the future. Signed-off-by:
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Evgenii Lepikhin authored
This patch adds a missing kfree for sess->sess_ops memory upon transport_init_session() failure. Signed-off-by:
Evgenii Lepikhin <johnlepikhin@gmail.com> Signed-off-by:
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- Apr 27, 2015
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Linus Torvalds authored
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