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* target/configfs: use kmalloc() instead of kzalloc() for default groupsSebastian Andrzej Siewior2012-11-283-12/+12
| | | | | | | | | | All elements are assigned even the NULL member at the end so there is no reason to allocate zeroed memory. (nab: Fix up minor apply breakage in for-next) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/configfs: allocate only 6 slots for dev_cg->default_groupsSebastian Andrzej Siewior2012-11-281-1/+1
| | | | | | | | | | | Only slots 0-5 are used so 6 slots should be enough. I don't see anyone writting anything else than NULL into ->default_groups[5] so a "late" initialisation should not happen here. (nab: Fix up minor apply breakage in for-next) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/configfs: allocate pointers instead of full struct for default_groupsSebastian Andrzej Siewior2012-11-283-12/+12
| | | | | | | | | | | default_groups is defined as struct config_group **default_groups so we don't need to allocate a whole struct but only enough space for a pointer that points there. (nab: Fix up minor apply breakage in for-next) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: update error handling for sbc_setup_write_same()Dan Carpenter2012-11-281-3/+3
| | | | | | | | We recently changed this to return positive subsystem error codes so the error handling needs to be updated. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsit: use GFP_ATOMIC under spin lockWei Yongjun2012-11-281-1/+1
| | | | | | | | | | The function iscsit_build_conn_drop_async_message() is called from iscsit_close_connection() with spin lock 'sess->conn_lock' held, so we should use GFP_ATOMIC instead of GFP_KERNEL. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi_target: Remove redundant null check before kfreeSachin Kamat2012-11-281-4/+2
| | | | | | | kfree on null pointer is a no-op. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/iblock: Forward declare bio helpersNicholas Bellinger2012-11-281-86/+81
| | | | | | | | Go ahead and forward declare the handful of helper functions required for bio submission code in order to avoid the extra function prototypes. Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Clean up flow in transport_check_aborted_status()Roland Dreier2012-11-281-14/+10
| | | | | Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
* target: Clean up logic in transport_put_cmd()Roland Dreier2012-11-281-5/+4
| | | | | | | No need to have a goto where a return is clearer. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
* qla2xxx: Look up LUN for abort requestsSteve Hodgson2012-11-281-1/+20
| | | | | | | | | | | | | Search through the list of pending commands on the session list to find the command the initiator is actually aborting, so that we can pass the correct LUN to the core TMR handling code. (nab: Allow abort requests to work to LUN=0 with mainline target code) Signed-off-by: Steve Hodgson <steve@purestorage.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
* target: Update copyright information to 2012Nicholas Bellinger2012-11-2818-59/+19
| | | | | | | | v2: Use correct target_core_stat.c 2006 copyright year v3: Drop extra unnessary legal verbage from header (hch) Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/iblock: Add WRITE_SAME w/ UNMAP=0 emulation supportNicholas Bellinger2012-11-151-7/+79
| | | | | | | | | | | | | | | | | | | | | This patch adds support for emulation of WRITE_SAME w/ UNMAP=0 within iblock_execute_write_same() backend code. The emulation uses a bio_add_page() call for each sector, and by default enforces a limit of max_write_same_len=0xFFFF (65536) sectors following what scsi_debug reports per default for MAXIMUM WRITE SAME LENGTH. It also sets max_write_same_len to the operational default at setup -> iblock_configure_device() time. (hch: Move unmap logic into iblock_execute_write_same_unmap + add check for single sector SGLs in iblock_execute_write_same) (mkp: Update comment for 0xFFFF magic constant) (nab: drop left-over max_write_same_len check in iblock_execute_write_same) Cc: Christoph Hellwig <hch@lst.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Add/check max_write_same_len device attribute + update block limits VPDNicholas Bellinger2012-11-156-1/+33
| | | | | | | | | | | | | | | | | | | This patch adds a new max_write_same_len device attribute for use with WRITE_SAME w/ UNMAP=0 backend emulation. This can be useful for lowering the default backend value (IBLOCK uses 0xFFFF). Also, update block limits VPD emulation code in spc_emulate_evpd_b0() to report MAXIMUM WRITE SAME LENGTH, and enforce max_write_same_len during sbc_parse() -> sbc_setup_write_same() CDB sanity checking for all emulated WRITE_SAME w/ UNMAP=0 cases. (Robert: Move max_write_same_len check in sbc_setup_write_same() to check both WRITE_SAME w/ UNMAP=1 and w/ UNMAP=0 cases) Cc: Christoph Hellwig <hch@lst.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Robert Elliott <Elliott@hp.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/sbc: Seperate WRITE_SAME based on UNMAP flag in sbc_opsNicholas Bellinger2012-11-152-28/+24
| | | | | | | | | | | | | This patch adds a new sbc_ops->execute_write_same_unmap() caller for use with WRITE_SAME w/ UNMAP=1, and performs the ->execute_cmd() setup based this bit within sbc_setup_write_same() code. Also, makes the changes in sbc_parse_cdb() to handle a sense_reason_t return from sbc_setup_write_same() on error. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Change sbc_emulate_noop to return sense_reason_tNicholas Bellinger2012-11-081-8/+2
| | | | | | | | | | | | | | | As reported by Fengguang Wu + 0 day build team, the sense_reason_t conversion in for-next did not catch the recent sbc_emulate_noop() addition in mainline, producing the following build warning in auto-next: drivers/target/target_core_sbc.c: In function ‘sbc_parse_cdb’: drivers/target/target_core_sbc.c:555: warning: assignment from incompatible pointer type Go ahead and remove duplicate sbc_emulate_verify(), and change VERIFY to use sbc_emulate_noop() as well. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* sbp-target: remove depends on CONFIG_EXPERIMENTALKees Cook2012-11-081-1/+1
| | | | | | | | | | | The CONFIG_EXPERIMENTAL config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, remove it from any "depends on" lines in Kconfigs. CC: Chris Boot <bootc@bootc.net> CC: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Always send a response before terminating iSCSI connectionRoland Dreier2012-11-082-6/+12
| | | | | | | | | | | | There are some cases, for example when the initiator sends an out-of-bounds ErrorRecoveryLevel value, where the iSCSI target terminates the connection without sending back any error. Audit the login path and add appropriate iscsit_tx_login_rsp() calls to make sure this doesn't happen. Signed-off-by: Roland Dreier <roland@purestorage.com> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Fix bug in handling of ExpStatSN ACK during u32 wrap-aroundSteve Hodgson2012-11-083-4/+4
| | | | | | | | | | | | | | | | | | This patch fixes a bug in the hanlding of initiator provided ExpStatSN and individual iscsi_cmd->stat_sn comparision during iscsi_conn->stat_sn wrap-around within iscsit_ack_from_expstatsn() code. This bug would manifest itself as iscsi_cmd descriptors not being Acked by a lower ExpStatSn, causing them to be leaked until an iSCSI connection or session reinstatement event occurs to release all commands. Also fix up two other uses of incorrect CmdSN SNA comparison to use wrapper usage from include/scsi/iscsi_proto.h. Signed-off-by: Steve Hodgson <steve@purestorage.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Fix potential deadlock on lock taken in timerRoland Dreier2012-11-081-2/+2
| | | | | | | | | | | | | | | | We need to disable BHs when taking sess_idr_lock because the iscsit_handle_time2retain_timeout() timer function takes se_tpg->session_lock, and iscsit_close_session() nests sess_idr_lock inside se_tpg->session_lock. So if the timer can run inside sess_idr_lock, we have a potential AB-BA deadlock. Fix this by disabling BHs when taking sess_idr_lock. This was found because of a lockdep warning, but it looks like a real (if highly theoretical) deadlock. In any case avoiding lockdep spew so that we can find other issues is a worthy cause. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix exception path pr_reg put regression for PR RELEASENicholas Bellinger2012-11-081-1/+1
| | | | | | | | | | | | Fix a regression bug in core_scsi3_emulate_pro_release() where should still be getting released via core_scsi3_put_pr_reg() during No persistent reservation, with returing GOOD status. Use goto statement here to follow converted code from hch. Cc: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix possible TFO->write_pending() sense_reason_t silent WRITE corruptionNicholas Bellinger2012-11-081-1/+1
| | | | | | | | | | | | | | | | This patch fixes a possible case in transport_generic_new_cmd() where a failure from TFO->write_pending() from a fabric module return something other than -EAGAIN or -ENOMEM would cause a failed WRITE to silently succeed. Go ahead and return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE for this special case instead of only just making noise with WARN_ON(). (v2: Fix incorrect exception return for all cases) Cc: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix incorrect inversion of TPGS_EXPLICT_ALUA checkNicholas Bellinger2012-11-071-1/+1
| | | | | | | | | Fix a bug introduced with patch "target: pass sense_reason as a return value" in for-3.8 code where only target port groups with TPGS_EXPLICT_ALUA set need to be allowed to perform explictly ALUA. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: pass sense_reason as a return valueChristoph Hellwig2012-11-0724-1059/+841
| | | | | | | | | | | | | | | Pass the sense reason as an explicit return value from the I/O submission path instead of storing it in struct se_cmd and using negative return values. This cleans up a lot of the code pathes, and with the sparse annotations for the new sense_reason_t type allows for much better error checking. (nab: Convert spc_emulate_modesense + spc_emulate_modeselect to use sense_reason_t with Roland's MODE SELECT changes) Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix incorrect starting offset after MODE_SENSE refactoringNicholas Bellinger2012-11-071-2/+5
| | | | | | | | | | | | | | | | This patch fixes a new off-by-one bug in the hardcoded starting offset of spc_emulate_modesense() code that causes BLOCK DESCRIPTOR to be incorrectly written within the MEDIUM TYPE buffer area of the mode parameter header. According to spc4r30, Section 7.5.4, BLOCK DESCRIPTOR for MODE_SENSE_10 starts at byte 3, and BLOCK_DESCRIPTOR for MODE_SENSE (6) starts at byte 2. (roland: add MODE DATA LENGTH + MEDIUM TYPE offset comment) Cc: Roland Dreier <roland@purestorage.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Add emulation for MODE SELECTRoland Dreier2012-11-071-0/+53
| | | | | | | | | | This is another thing that compliance tests try, and it's easy to implement on top of the MODE SENSE refactoring; since we don't claim to support any changeable values, all we need to do is check that the page contents sent by the initiator match what we would return. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Implement mode page 0x1c, "Informational Exceptions"Roland Dreier2012-11-071-0/+14
| | | | | | | | | The Windows SCSI compliance test asks for this mode page, and it's easy to implement: we can just return all 0s to show we don't support any of these features. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Refactor MODE SENSE emulationRoland Dreier2012-11-071-59/+176
| | | | | | | | | | | | | | | | | | | Convert spc_emulate_modesense() to use a table of mode pages, rather than a switch statement. This makes it possible to add more pages sanely -- in particular we no longer need to make sure we keep the 0x3f (return all mode pages) case in sync. While we're touching this code, make our MODE SENSE emulation a bit better in a couple of ways: - When the initiator passes PC == 1 asking for changeable values, return all 0s to show we don't support setting anything. - Return a block descriptor for disk devices. (nab: fix up device attribute references to use dev->dev_attrib in for-next code) Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Use list_first_entry() where appropriateRoland Dreier2012-11-072-6/+5
| | | | | | | | | | | | | | | Instead of using the obfuscated pattern of list_for_each_entry(var, list, ...) break; to set var to the first entry of a list, use the straightforward var = list_first_entry(list, ...); Reported-by: Joern Engel <joern@logfs.org> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: remove ->get_device_revChristoph Hellwig2012-11-078-26/+1
| | | | | | | | | Now that the reservations and ALUA code have been cleaned up there is no need for the get_device_rev method, as we only need the standards revision in the inquiry data, where we can hardcode it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: simplify alua supportChristoph Hellwig2012-11-077-166/+65
| | | | | | | | We always support ALUA for virtual backends, and never for physical ones. Simplify the code to just deal with these two cases and remove the superflous abstractions. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: simplify reservations codeChristoph Hellwig2012-11-077-298/+127
| | | | | | | | | | | | We do not support host-level reservations for the pscsi backend, and all virtual backends are newere than SCSI-2, so just make the combined SPC-3 + SCSI-2 support the only supported variant and kill the switches for the different implementations, given that this code handles the no-op version just fine. (hch: Update DRF_SPC2_RESERVATIONS lock usage) Signed-off-by: Christoph Hellwig <hch@lst.de>
* target: kill dev->dev_task_attr_typeChristoph Hellwig2012-11-074-83/+69
| | | | | | | We can just key off ordered tag emulation of the transport_type field. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* pscsi: fix REPORT LUNS handlingChristoph Hellwig2012-11-071-1/+2
| | | | | | | | We need to assign spc_emulate_report_luns to the execute_cmd callback and not execute it directly. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/pscsi: Make pscsi_configure_device + target_release_session staticFengguang Wu2012-11-072-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | drivers/target/target_core_pscsi.c:464:5: sparse: symbol 'pscsi_configure_device' was not declared. Should it be static? FYI, there are new sparse warnings show up in tree: git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git queue head: 738b86ac5e56c645aa5b7bf49cb38e2a04c665f8 commit: 410aeee637c47bcf7e8dd7893347fe0811e07ab1 [47/51] target: kill struct se_subsystem_dev vim +464 drivers/target/target_core_pscsi.c 410aeee6 Christoph Hellwig 2012-10-08 @464 int pscsi_configure_device(struct se_device *dev) c66ac9db Nicholas Bellinger 2010-12-17 465 { 410aeee6 Christoph Hellwig 2012-10-08 466 struct se_hba *hba = dev->se_hba; 410aeee6 Christoph Hellwig 2012-10-08 467 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); c66ac9db Nicholas Bellinger 2010-12-17 468 struct scsi_device *sd; 410aeee6 Christoph Hellwig 2012-10-08 469 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; c66ac9db Nicholas Bellinger 2010-12-17 470 struct Scsi_Host *sh = phv->phv_lld_host; c66ac9db Nicholas Bellinger 2010-12-17 471 int legacy_mode_enable = 0; 410aeee6 Christoph Hellwig 2012-10-08 472 int ret; Please consider folding the attached diff :-) Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: provide generic sbc device type/revision helpersChristoph Hellwig2012-11-075-45/+22
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/pscsi: call spc_emulate_report_luns directlyChristoph Hellwig2012-11-073-10/+5
| | | | | | | | | | No need to indirect through spc_parse_cdb if we only ever call it for REPORT LUNS emulation. (nab: Add missing EXPORT_SYMBOL for spc_emulate_report_luns) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: move REPORT LUNS emulation to target_core_spc.cChristoph Hellwig2012-11-073-65/+64
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: rename spc_opsChristoph Hellwig2012-11-075-9/+9
| | | | | | | These really are sbc_ops, so name them correctly. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: kill struct se_subsystem_devChristoph Hellwig2012-11-0726-1909/+1049
| | | | | | | | | | Simplify the code a lot by killing the superflous struct se_subsystem_dev. Instead se_device is allocated early on by the backend driver, which allocates it as part of its own per-device structure, borrowing the scheme that is for example used for inode allocation. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* Linux 3.7-rc4v3.7-rc4Linus Torvalds2012-11-041-1/+1
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* Merge tag 'nfs-for-3.7-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds2012-11-0311-35/+110
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client bugfixes from Trond Myklebust: - Fix a bunch of deadlock situations: * State recovery can deadlock if we fail to release sequence ids before scheduling the recovery thread. * Calling deactivate_super() from an RPC workqueue thread can deadlock because of the call to rpc_shutdown_client. - Display the device name correctly in /proc/*/mounts - Fix a number of incorrect error return values: * When NFSv3 mounts fail due to a timeout. * On NFSv4.1 backchannel setup failure * On NFSv4 open access checks - pnfs_find_alloc_layout() must check the layout pointer for NULL - Fix a regression in the legacy DNS resolved * tag 'nfs-for-3.7-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS4: nfs4_opendata_access should return errno NFSv4: Initialise the NFSv4.1 slot table highest_used_slotid correctly SUNRPC: return proper errno from backchannel_rqst NFS: add nfs_sb_deactive_async to avoid deadlock nfs: Show original device name verbatim in /proc/*/mount{s,info} nfsv3: Make v3 mounts fail with ETIMEDOUTs instead EIO on mountd timeouts nfs: Check whether a layout pointer is NULL before free it NFS: fix bug in legacy DNS resolver. NFSv4: nfs4_locku_done must release the sequence id NFSv4.1: We must release the sequence id when we fail to get a session slot NFS: Wait for session recovery to finish before returning
| * NFS4: nfs4_opendata_access should return errnoWeston Andros Adamson2012-11-021-1/+1
| | | | | | | | | | | | | | Return errno - not an NFS4ERR_. This worked because NFS4ERR_ACCESS == EACCES. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Initialise the NFSv4.1 slot table highest_used_slotid correctlyTrond Myklebust2012-11-011-1/+1
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * SUNRPC: return proper errno from backchannel_rqstWeston Andros Adamson2012-11-011-1/+1
| | | | | | | | | | | | | | | | The one and only caller (in fs/nfs/nfs4client.c) uses the result as an errno and would have interpreted an error as EPERM. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: add nfs_sb_deactive_async to avoid deadlockWeston Andros Adamson2012-10-315-3/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use nfs_sb_deactive_async instead of nfs_sb_deactive when in a workqueue context. This avoids a deadlock where rpc_shutdown_client loops forever in a workqueue kworker context, trying to kill all RPC tasks associated with the client, while one or more of these tasks have already been assigned to the same kworker (and will never run rpc_exit_task). This approach is needed because RPC tasks that have already been assigned to a kworker by queue_work cannot be canceled, as explained in the comment for workqueue.c:insert_wq_barrier. Signed-off-by: Weston Andros Adamson <dros@netapp.com> [Trond: add module_get/put.] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs: Show original device name verbatim in /proc/*/mount{s,info}Ben Hutchings2012-10-314-9/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit c7f404b ('vfs: new superblock methods to override /proc/*/mount{s,info}'), nfs_path() is used to generate the mounted device name reported back to userland. nfs_path() always generates a trailing slash when the given dentry is the root of an NFS mount, but userland may expect the original device name to be returned verbatim (as it used to be). Make this canonicalisation optional and change the callers accordingly. [jrnieder@gmail.com: use flag instead of bool argument] Reported-and-tested-by: Chris Hiestand <chiestand@salk.edu> Reference: http://bugs.debian.org/669314 Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: <stable@vger.kernel.org> # v2.6.39+ Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfsv3: Make v3 mounts fail with ETIMEDOUTs instead EIO on mountd timeoutsScott Mayhew2012-10-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In very busy v3 environment, rpc.mountd can respond to the NULL procedure but not the MNT procedure in a timely manner causing the MNT procedure to time out. The problem is the mount system call returns EIO which causes the mount to fail, instead of ETIMEDOUT, which would cause the mount to be retried. This patch sets the RPC_TASK_SOFT|RPC_TASK_TIMEOUT flags to the rpc_call_sync() call in nfs_mount() which causes ETIMEDOUT to be returned on timed out connections. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org
| * nfs: Check whether a layout pointer is NULL before free itYanchuan Nian2012-10-311-2/+2
| | | | | | | | | | | | | | | | | | The new layout pointer in pnfs_find_alloc_layout() may be NULL because of out of memory. we must do some check work, otherwise pnfs_free_layout_hdr() will go wrong because it can not deal with a NULL pointer. Signed-off-by: Yanchuan Nian <ycnian@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: fix bug in legacy DNS resolver.NeilBrown2012-10-311-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The DNS resolver's use of the sunrpc cache involves a 'ttl' number (relative) rather that a timeout (absolute). This confused me when I wrote commit c5b29f885afe890f953f7f23424045cdad31d3e4 "sunrpc: use seconds since boot in expiry cache" and I managed to break it. The effect is that any TTL is interpreted as 0, and nothing useful gets into the cache. This patch removes the use of get_expiry() - which really expects an expiry time - and uses get_uint() instead, treating the int correctly as a ttl. This fixes a regression that has been present since 2.6.37, causing certain NFS accesses in certain environments to incorrectly fail. Reported-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Chuck Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: nfs4_locku_done must release the sequence idTrond Myklebust2012-10-311-0/+1
| | | | | | | | | | | | | | | | If the state recovery machinery is triggered by the call to nfs4_async_handle_error() then we can deadlock. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org
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