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path: root/drivers/scsi/fcoe/libfcoe.c
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* [SCSI] libfcoe: VN2VN connection setup causing stack memory corruption.Kiran Patil2010-10-251-1/+1
| | | | | | | | | | | | | | Fix: When FIP frame is received, function fcoe_ctlr_vn_recv calls function fcoe_ctlr_vn_parse which does memset for addr (&buf.rdata) which leads to memory corruption. Code was trying to treat "buf" as struct but it was defined as union. Fix is to change from union to struct for "buf" in function fcoe_ctlr_vn_recv. Technical Details: N/A Signed-off-by: Kiran Patil <kiran.patil@intel.com> Acked-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] fcoe: remove check for zero fabric nameVasu Dev2010-07-281-1/+1
| | | | | | | | | | | | This check prevents FCF selection in NPV mode due to zero fabric name in that case and in turn flogi fails. Though NPV mode should not have this zero and should be fixed there also but spec also does not require initiator to ensure that fabric name must be non-zero, therefore dropping this check to get flogi working in NPV mode. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfc: don't require a local exchange for incoming requestsJoe Eykholt2010-07-281-5/+4
| | | | | | | | | | | | | | | | | | Incoming requests shouldn't require a local exchange if we're just going to reply with one or two frames and don't expect anything further. Don't allocate exchanges for such requests until requested by the upper-layer protocol. The sequence is always NULL for new requests, so remove that as an argument to request handlers. Also change the first argument to lport->tt.seq_els_rsp_send from the sequence pointer to the received frame pointer, to supply the exchange IDs and destination ID info. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] fcoe libfcoe: use correct FC-MAP for VN2VN modeJoe Eykholt2010-07-281-4/+20
| | | | | | | | | | In VN2VN mode, map_dest means to use the default VN2VN OUI. Change code that uses the default FCoE OUI to use the one set in the fcoe_ctlr struct. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Fix FIP ELS encapsulation details for FLOGI responsesJoe Eykholt2010-07-281-14/+28
| | | | | | | | | | | | | | | When sending a FLOGI LS_ACC, which we only do in point-to-multipoint mode, the MAC descriptor should have the granted MAC set to 0x0efd00 || D_ID. When sending an LS_RJT, there should be no MAC descriptor. When sending either an LS_ACC or LS_RJT, the subcode should indicate an reply, not a request. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fcoe: fnic: add FIP VN2VN point-to-multipoint supportJoe Eykholt2010-07-281-59/+1016
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The FC-BB-6 committee is proposing a new FIP usage model called VN_port to VN_port mode. It allows VN_ports to discover each other over a loss-free L2 Ethernet without any FCF or Fibre-channel fabric services. This is point-to-multipoint. There is also a variant of this called point-to-point which provides for making sure there is just one pair of ports operating over the Ethernet fabric. We add these new states: VNMP_START, _PROBE1, _PROBE2, _CLAIM, and _UP. These usually go quickly in that sequence. After waiting a random amount of time up to 100 ms in START, we select a pseudo-random proposed locally-unique port ID and send out probes in states PROBE1 and PROBE2, 100 ms apart. If no probe responses are heard, we proceed to CLAIM state 400 ms later and send a claim notification. We wait another 400 ms to receive claim responses, which give us a list of the other nodes on the network, including their FC-4 capabilities. After another 400 ms we go to VNMP_UP state and should start interoperating with any of the nodes for whic we receivec claim responses. More details are in the spec.j Add the new mode as FIP_MODE_VN2VN. The driver must specify explicitly that it wants to operate in this mode. There is no automatic detection between point-to-multipoint and fabric mode, and the local port initialization is affected, so it isn't anticipated that there will ever be any such automatic switchover. It may eventually be possible to have both fabric and VN2VN modes on the same L2 network, which may be done by two separate local VN_ports (lports). When in VN2VN mode, FIP replaces libfc's fabric-oriented discovery module with its own simple code that adds remote ports as they are discovered from incoming claim notifications and responses. These hooks are placed by fcoe_disc_init(). A linear list of discovered vn_ports is maintained under the fcoe_ctlr struct. It is expected to be short for now, and accessed infrequently. It is kept under RCU for lock-ordering reasons. The lport and/or rport mutexes may be held when we need to lookup a fcoe_vnport during an ELS send. Change fcoe_ctlr_encaps() to lookup the destination vn_port in the list of peers for the destination MAC address of the FIP-encapsulated frame. Add a new function fcoe_disc_init() to initialize just the discovery portion of libfcoe for VN2VN mode. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: add state change debuggingJoe Eykholt2010-07-281-7/+41
| | | | | | | | Enhancement: add debug messages at all state transitions. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fcoe: fnic: change fcoe_ctlr_init interface to specify modeJoe Eykholt2010-07-281-2/+2
| | | | | | | | | | There are three modes that libfcoe currently supports, and a new one is coming. Change the fcoe_ctlr_init() interface to add the mode desired. This should not change any functionality. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: convert FIP to lock with mutex instead of spin lockJoe Eykholt2010-07-281-61/+55
| | | | | | | | | | | | | | | | It turns out most of the FIP work is now done from worker threads or process context now, so there's no need to use a spin lock. Change to use mutex instead of spin lock and delayed_work instead of a timer. This will make it nicer for the VN_port to VN_port feature that will interact more with the libfc layers requiring that spinlocks not be held. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Check for order and missing critical descriptors for FIP ELS ↵Bhanu Prakash Gollapudi2010-07-271-3/+28
| | | | | | | | | | | | requests As per FC-BB-5 rev.2, section 7.8.7.1, strict ordering of FIP descriptors is required for ELS requests. Also, look for missing and duplicate critical descriptors. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Host doesnt handle CVL to NPIV portsBhanu Prakash Gollapudi2010-07-271-9/+33
| | | | | | | | | Clear virtual link for NPIV ports is now handled by resetting the matching vnport. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Handle duplicate critical descriptorsBhanu Prakash Gollapudi2010-07-271-0/+41
| | | | | | | | | | | | As per FC-BB-5 rev 2, section 7.8.6.2, malformed FIP frame shall be discarded. Drop discovery adv, ELS and CLV's with duplicate critical descriptors. [Resending after incorporating Joe's review comments] Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: update FIP FCF D flag from advertismentsJoe Eykholt2010-07-271-6/+9
| | | | | | | | | Allow the D flag (indicating that keep-alives are not needed) to be updated dynamically from received FIP advertisements. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Use fka_period as periodic timeouts to age out fcf ifJoe Eykholt2010-07-271-6/+7
| | | | | | | | | | | | | | | | | | keep alives are disabled due to fd_flags set and also stop updating keep alive values in that case. Update select fcf time only if fcf is not already selected or select time is not already determined from parse adv, and then have select time cleared only once after fcf is selected. Changed deadline check to time_after_eq() from time_after() since now next timeout will be on exact 2.5 times FKA followed by first advertisement. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fix lenient aging of FCF advertisementsJoe Eykholt2010-07-271-34/+42
| | | | | | | | | | | | | | | | | | [This patch has several improvements to the code in the fip timers. It hasn't been tested yet. I'm sending it out for review. Vasu, perhaps you can merge this with your patch and test it together.] The current code allows an advertisement to be used even if it has been 3 times the FCF keep-alive advertisement period (FKA) since one was received from that FCF. The spec. calls for 2.5 times FKA. Fix this and make sure we detect missed keep-alives promptly. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: No solicitation if adv is droppedBhanu Prakash Gollapudi2010-07-271-1/+4
| | | | | | | | | | | Host does not send discovery solicitation messages if Disc. Adv from FCF are dropped. It restarts sending solicitation only after receiving a Discovery Adv. from FCF. Fix is to restart solicitation immediately after CVL processing. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Avoid hang when receiving non-critical descriptorsBhanu Prakash Gollapudi2010-07-271-2/+2
| | | | | | | | | | Avoid infinite loop while processing FIP ELS or discovery advertisement with non-critical descriptors. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Acked-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: FIP link keep-alive should continue while logged offJoe Eykholt2010-07-271-1/+1
| | | | | | | | | | | | | A check in fcoe_ctlr_send_keep_alive() returns if there's no port_id for the local port. This could miss a keep alive if we just did a host reset and have logged off and will log back in. Return only if we are doing the port keep alive, in which case we need to be logged in. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: FIP Keep-Alive messages for VPorts are sent with incorrect ↵Kaladhar Musunuru2010-05-161-2/+2
| | | | | | | | | | | port_id and wwn All VNports are sending FIP Keep-Alive messages with port_id and wwpn of the parent host instead of it's own port_id and wwpn. Standard FIP descriptor type 11 indicates to send own port_id and port_name. Signed-off-by: Kaladhar Musunuru <kmusunuru@juniper.net> Acked-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Fix incorrect MAC address clearingKaladhar Musunuru2010-05-161-1/+1
| | | | | | | | | Fix typo in memset. Incorrect length parameter to memset resulting non-zero MAC address in FPMA messages. Signed-off-by: Kaladhar Musunuru <kmusunuru@juniper.net> Acked-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfc: Move the port_id into lportRobert Love2010-05-161-5/+4
| | | | | | | | | | | | | | | | This patch creates a port_id member in struct fc_lport. This allows libfc to just deal with fc_lport instances instead of calling into the fc_host to get the port_id. This change helps in only using symbols necessary for operation from the libfc structures. libfc still needs to change the fc_host_port_id() if the port_id changes so the presentation layer (scsi_transport_fc) can provide the user with the correct value, but libfc shouldn't rely on the presentation layer for operational values. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfc: Remove extra pointer checkRobert Love2010-05-161-2/+1
| | | | | | | | The fcf pointer is checked again after this verification making the first check redundant. Remote the first check. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfc, fcoe: normalize format specifies for world wide namesChris Leech2010-04-111-9/+12
| | | | | | | | | | | Print all world wide node names (node, port and fabric) with the same format specifier of "%16.16llx". That makes sure they all print as a 16 character hex string, with lower case letters, no 0x prefix, and without stripping off any leading 0s. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Don't fill MAC desc in FLOGI if FIP negotiated FPMARobert Love2010-04-111-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | FPMA indicates that the Fabric will provide the host's N_Port's MAC address. When sending a FLOGI/FDISC frame and FPMA was negotiated through FIP discovery we still need to provide the MAC descriptor, as per the specification, but the MAC should be zero'd out since the FCF will be providing it in the FLOGI/FDISC ACC. In FC-BB-5 section 7.8.7.4.2 (Fabric login) it states: The MAC address field in the MAC address descriptor of a FIP FLOGI Request operation or a FIP NPIV FDISC Request operation shall contain: a) the proposed MAC address to use as VN_Port MAC address if the ENode is requesting to use SPMA (see table 27); b) all zeroes to indicate no MAC address is proposed if the ENode is requesting to use FPMA (see table 27); or c) the proposed MAC address to use as VN_Port MAC address if the ENode supports both SPMA and FPMA and leaves the decision of which addressing scheme to use to the FCF (i.e., if both the FP and SP bits are set to one, see table 27). This patch fixes case B. This patch also adds debug statements to illustrate whether a FPMA or SPMA MAC is added to a FLOGI/FDISC frame. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfc, libfcoe, fcoe: use smp_processor_id() only when preempt disabledJoe Eykholt2010-04-111-6/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When the kernel is configured for preemption, using smp_processor_id() when preemption is enabled causes a warning backtrace and is wrong since we could move off of that CPU as soon as we get the ID, and we would be referencing the wrong CPU, and possibly an invalid one if it could be hotswapped out. Remove the fc_lport_get_stats() function and explicitly use per_cpu_ptr() to get the statistics. Where preemption has been disabled by holding a _bh lock continue to use smp_processor_id(), but otherwise use get_cpu()/put_cpu(). In fcoe_recv_frame() also changed the cases where we return in the middle to do a goto to the code which bumps ErrorFrames and does a put_cpu(). Two of these cases didn't bump ErrorFrames before, but doing so is harmless because they "can't happen", due to prior length checks. Also rearranged code in fcoe_recv_frame() to have only one call to fc_exch_recv(). It's just as efficient and saves a call to put_cpu(). In fc_fcp.c, adjusted a FIXME comment for code which doesn't need fixing. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: eliminate unused link and last_link fieldsJoe Eykholt2010-04-111-29/+11
| | | | | | | | | | | | | | | The link and last_link fields in the fcoe_ctlr struct are no longer useful, since they are always set to the same value, and FIP always calls libfc to pass link information to the lport. Eliminate those fields and rename link_work to timer_work, since it no longer has any link change work to do. Thanks to Brian Uchino for discovering this issue. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fix debug message entering non-FIP modeJoe Eykholt2010-04-111-3/+3
| | | | | | | | | | | | The debug message that indicated we are using non-FIP mode was being printed only if we were already in non-FIP mode. Also changed the message text to make it more clear the mode is being set, not that the message is indicating how FLOGI was received. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* [SCSI] libfcoe: Send port LKA every FIP_VN_KA_PERIOD secs.Bhanu Prakash Gollapudi2010-02-171-1/+1
| | | | | | | | | | | | | libfcoe module doesnt send port keep alive every FIP_VN_KA_PERIOD due to improper assignment of timeout value. Update the port_ka_time appropriately by incrementing it by FIP_VN_KA_PERIOD in fcoe_ctlr_timeout(), so that the link_work is scheduled to send the port LKA. Signed-off-by: Bhanu Gollapudi <bprakash@broadcom.com> Acked-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: add tracking FIP Missing Discovery Advertisement countYi Zou2009-12-041-0/+14
| | | | | | | | | | Add tracking the Missing Discovery Advertisement count for FIP Fiber Channel Forwarder (FCF) as described in FC-BB-5 Rev2.0 for LESB. The time is 1.5 times the FKA_ADV_PERIOD of the corresponding FCF. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: add tracking FIP Virtual Link Failure countYi Zou2009-12-041-0/+2
| | | | | | | | | | Add tracking the Virtual Link Failure count when either we have found the FCF as "aged" or we are receiving FIP Clear Virtual Link from the FCF. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: add checking disable flag in FIP_FKA_ADVYi Zou2009-12-041-1/+3
| | | | | | | | | | | | | | When the D bit is set if the FKA_ADV_Period of the FIP Discovery Advertisement, the ENode should not transmit period ENode FIP Keep Alive and VN_Port FIP Keep Alive (FC-BB-5 Rev2, 7.8.3.13). Note that fcf->flags is taken directly from the fip_header, I am claiming one bit for the purpose of the FIP_FKA_Period D bit as FIP_FL_FK_ADV_B, and use FIP_HEADER_FLAGS as bitmask for bits used in fip_header. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Do not pad FIP keep-alive to full frame sizeYi Zou2009-12-041-2/+1
| | | | | | | | | According to the FC-BB-5 Rev2.0, 7.8.6.2, we should not pad FIP keep-alive frames. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fcoe: simplify receive FLOGI responseJoe Eykholt2009-12-041-6/+6
| | | | | | | | | | | | | | | | | | | | | There was a locking problem where the fip->lock was held during the call to update_mac(). The rtnl_lock() must be taken before the fip->lock, not the other way around. This fixes that. Now that fcoe_ctlr_recv_flog() is called only from the response handler to a FLOGI request, some checking can be eliminated. Instead of calling update_mac(), just fill in the granted_mac address for the passed-in frame (skb). Eliminate the passed-in source MAC address since it is also in the skb. Also, in fcoe, call fcoe_set_src_mac() directly instead of going thru the fip function pointer. This will generate less code. Then, since fip isn't needed for LOGO response, use lport as the arg. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: don't send ELS in FIP mode if no FCF selectedJoe Eykholt2009-12-041-0/+2
| | | | | | | | | | | | If link is up, but no FCF is selected, don't send any ELS frames. This came up when an fnic received a multicast advertisement but no solitited advertisments, so no FCF was selected. It tried to send FLOGIs anyway. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: FIP should report link to libfc whether selected or notJoe Eykholt2009-12-041-30/+30
| | | | | | | | | | | | | | | | | | | | | | | The fnic driver with FIP is reporting link up, even though it's down. When the interface is shut down by the switch, we receive a clear virtual link, and set the state reported to libfc as down, although we still report it up. Clearly wrong. That causes the subsequent link down event not to be reported, and /sys shows the host "Online". Currently, in FIP mode, if an FCF times out, then link to libfc is reported as down, to stop FLOGIs. That interferes with the LLD link down being reported. Users really need to know the physical link information, to diagnose cabling issues, so physical link status should be reported to libfc. If the selected FCF needs to be reported, that should be done separately, in a later patch. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fip: allow FIP receive to be called from IRQ.Joe Eykholt2009-12-041-13/+4
| | | | | | | | | | | | FIP's fcoe_ctlr_recv() function was previously only called from the soft IRQ in FCoE. It's not performance critical and is more convenient for some drivers to call it from the IRQ level. Just Change to use skb_queue()/dequeue() which uses spinlock_irqsave instead of separate locking with _bh locks. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: fip: use SCSI host number to identify debug messages.Joe Eykholt2009-12-041-21/+26
| | | | | | | | | Use scsi host number to identify debug messages. Previously, no instance information was given, so if multiple ports were active, it became confusing. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Allow FIP to be disabled by the driverJoe Eykholt2009-12-041-2/+4
| | | | | | | | | | | | | Allow FIP to be disabled by the driver for devices that want to use libfcoe in non-FIP mode. The driver merely sets the fcoe_ctlr mode to the state which should be entered when the link comes up. The default is auto. No change is needed for fcoe.c which uses auto mode. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: formatting and comment cleanupsRobert Love2009-12-041-105/+111
| | | | | | | | | | | | | | Ensures that there are kernel-doc style comments for all routines and structures. There were also a few instances of fc_lport's named 'lp' which were switched to 'lport' as per the libfc/libfcoe/fcoe naming convention. Also, emacs 'indent-region' and 'tabify' were ran on libfcoe.c. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe, fcoe: libfcoe NPIV supportChris Leech2009-12-041-33/+49
| | | | | | | | | | | | | | | | | | | | | | | | | The FIP code in libfcoe needed several changes to support NPIV 1) dst_src_addr needs to be managed per-n_port-ID for FPMA fabrics with NPIV enabled. Managing the MAC address is now handled in fcoe, with some slight changes to update_mac() and a new get_src_addr() function pointer. 2) The libfc elsct_send() hook is used to setup FCoE specific response handlers for FIP encapsulated ELS exchanges. This lets the FCoE specific handling know which VN_Port the exchange is for, and doesn't require tracking OX_IDs. It might be possible to roll back to the full FIP frame in these, but for now I've just stashed the contents of the MAC address descriptor in the skb context block for later use. Also, because fcoe_elsct_send() just passes control on to fc_elsct_send(), all transmits still come through the normal frame_send() path. 3) The NPIV changes added a mutex hold in the keep alive sending, the lport mutex is protecting the vport list. We can't take a mutex from a timer, so move the FIP keep alive logic to the link work struct. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfc, libfcoe: FDISC ELS for NPIVChris Leech2009-12-041-3/+3
| | | | | | | | | | | Add FDISC ELS handling to libfc and libfcoe, treat it the same as FLOGI where appropriate. Add checking for NPIV support in the FLOGI LS_ACC service parameters. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* includecheck fix: drivers/scsi, libfcoe.cJaswinder Singh Rajput2009-09-201-1/+0
| | | | | | | | | | | fix the following 'make includecheck' warning: drivers/scsi/fcoe/libfcoe.c: linux/netdevice.h is included more than once. Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <1247066936.4382.76.camel@ht.satnam>
* [SCSI] libfcoe: fcoe_ctlr_destroy use cancel_work_sync instead of flush_workChris Leech2009-09-101-2/+6
| | | | | | | | | | | | Use cancel_work_sync() in place of flush_work(), so that fcoe_ctlr_destroy() can be called from a workqueue. Also, purge the receive queue after the recv_work has been cancled because if recv_work isn't run it's not guaranteed to be empty now. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] fcoe: libfcoe: extra semicolon in CHECK_LOGGING macros causes compile ↵Joe Eykholt2009-09-051-1/+1
| | | | | | | | | | | | | | | | | | | | error If using code like this: if (foo) FCOE_DBG("foo\n); else FCOE_DBG("bar\n"); one gets compile errors because FCOE_DBG expands with its own semicolon, making one too many for the if-statement. Remove the offending semicolon in fcoe.h and also a similar case in libfcoe.c. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor listVasu Dev2009-08-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modifies current code to use EM anchor list in EM allocation, EM free, EM reset, exch allocation and exch lookup code paths. 1. Modifies fc_exch_mgr_alloc to accept EM match function and then have allocated EM added to the lport using fc_exch_mgr_add API while also updating EM kref for newly added EM. 2. Updates fc_exch_mgr_free API to accept only lport pointer instead EM and then have this API free all EMs of the lport from EM anchor list. 3. Removes single lport pointer link from the EM, which was used in associating lport pointer in newly allocated exchange. Instead have lport pointer passed along new exchange allocation call path and then store passed lport pointer in newly allocated exchange, this will allow a single EM instance to be used across more than one lport and used in EM reset to reset only lport specific exchanges. 4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list of the lport, adds additional exch lport pointer (ep->lp) check for shared EM case to reset exchange specific to a lport requested reset. 5. Updates exch allocation API fc_exch_alloc to use EM anchor list and its anchor match func pointer. The fc_exch_alloc will walk the list of EMs until it finds a match, a match will be either null match func pointer or call to match function returning true value. 6. Updates fc_exch_recv to accept incoming frame on local port using only lport pointer and frame pointer without specifying EM instance of incoming frame. Instead modified fc_exch_recv to locate EM for the incoming frame by matching xid of incoming frame against a EM xid range. This change was required to use EM list in libfc Rx path and after this change the lport fc_exch_mgr pointer emp is not needed anymore, so removed emp pointer. 7. Updates fnic for removed lport emp pointer and above modified libfc APIs fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free. 8. Removes exch_get and exch_put from libfc_function_template as these are no longer needed with EM anchor list and its match function use. Also removes its default function fc_exch_get. A defect this patch introduced regarding the libfc initialization order in the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] libfcoe: Set fip_flags according to fcf and lport's capability of ↵Yi Zou2009-08-221-3/+9
| | | | | | | | | | | | SPMA support When encap the els for FIP, set the fip_flags according to the FCF and lport's capability of supporting SPMA or FPMA or both. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] fcoe: convert to %pMJohannes Berg2009-08-221-4/+2
| | | | | | | | | | print_mac is being deprecated, and %pM makes for smaller code anyway. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* libfcoe: Add runtime debugging with module param debug_loggingRobert Love2009-06-211-40/+54
| | | | | | | | | | | | | | | This patch adds a 'debug_logging' module parameter to libfcoe.ko. It is an unsigned int that represents a bitmask of available debug logging levels, each of which can be tuned at runtime. Currently there are only two logging levels for this module- bit LSB 0 = libfcoe general logging 1 = FIP logging Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* Merge branch 'master' of ↵David S. Miller2009-06-151-8/+13
|\ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: Documentation/feature-removal-schedule.txt drivers/scsi/fcoe/fcoe.c net/core/drop_monitor.c net/core/net-traces.c
generated by cgit v1.1 at 2024-09-18 08:31:00 +0000