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ss the right scsi_in() and/or scsi_out() side of things. also for resid. - Handle BIDI underflow overflow from target Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Reviewed-by: Pete Wyckoff <pw@osc.edu> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] iscsi: extended cdb supportBoaz Harrosh2-7/+54 Support for extended CDBs in iscsi. All we need is to check if command spills over 16 bytes then allocate an iscsi-extended-header for the leftovers. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Reviewed-by: Pete Wyckoff <pw@osc.edu> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] zfcp: Fix error handling for blocked unit for send FCP commandChristof Schmitt1-1/+1 In the case the unit is blocked, zfcp_unit_get has not been called yet, so the error handling path should not call zfcp_unit_put. Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] zfcp: Remove zfcp_erp_wait from slave destory handler to fix deadlockChristof Schmitt1-1/+0 The testcase # chchp -v 0 0.da && sleep 59 && chchp -v 1 0.da results in this deadlock situation: STACK TRACE FOR TASK: 0x7e9a2048 (zfcperp0.0.c613) 0 schedule+816 [0x356b3c] 1 schedule_timeout+172 [0x357340] 2 wait_for_common+192 [0x3565fc] 3 flush_cpu_workqueue+116 [0x52af0] 4 flush_workqueue+116 [0x533b8] 5 fc_remote_port_add+64 [0x1c83ec] 6 zfcp_erp_thread+4534 [0x26585a] 7 kernel_thread_starter+6 [0x195d2] STACK TRACE FOR TASK: 0x7f8ec048 (fc_wq_0) 0 schedule+816 [0x356b3c] 1 zfcp_erp_wait+104 [0x264568] 2 zfcp_scsi_slave_destroy+64 [0x261b24] 3 __scsi_remove_device+154 [0x1c24ba] 4 scsi_remove_device+62 [0x1c2512] 5 __scsi_remove_target+198 [0x1c25ea] 6 __remove_child+58 [0x1c26d6] 7 device_for_each_child+66 [0x1ab566] 8 scsi_remove_target+98 [0x1c268a] 9 run_workqueue+200 [0x5272c] 10 worker_thread+146 [0x52882] 11 kthread+140 [0x58360] 12 kernel_thread_starter+6 [0x195d2] Remove the zfcp_erp_wait call that is not required here to prevent the deadlock situation. Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] zfcp: fix 31 bit compile warningsMartin Peschke11-213/+211 drivers/s390/scsi/zfcp_aux.c: In function ‘zfcp_fsf_incoming_els_rscn’: drivers/s390/scsi/zfcp_aux.c:1379: warning: cast from pointer to integer of different size drivers/s390/scsi/zfcp_aux.c: In function ‘zfcp_fsf_incoming_els_plogi’: drivers/s390/scsi/zfcp_aux.c:1432: warning: cast from pointer to integer of different size drivers/s390/scsi/zfcp_aux.c: In function ‘zfcp_fsf_incoming_els_logo’: drivers/s390/scsi/zfcp_aux.c:1457: warning: cast from pointer to integer of different size .. Just passing pointers rids us of these warnings and improves readability. Signed-off-by: Martin Peschke <mp3@de.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] bsg: no need to set BSG_F_BLOCK bit in bsg_complete_all_commandsFUJITA Tomonori1-2/+0 Before bsg_complete_all_commands is called, BSG_F_BLOCK bit is always set. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] bsg: remove minor in struct bsg_deviceFUJITA Tomonori1-6/+4 minor in struct bsg_device is used as identifier to find the corresponding struct bsg_device_class. However, request_queuse can be used as identifier for that and the minor in struct bsg_device is unnecessary. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] bsg: use better helper list functionsFUJITA Tomonori1-8/+6 This replace hlist_for_each and list_entry with hlist_for_each_entry and list_first_entry respectively. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] bsg: replace kobject_get with blk_get_queueFUJITA Tomonori1-2/+7 Both takes a ref to a queue. But blk_get_queue checks QUEUE_FLAG_DEAD and is more appropriate interface here. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18[SCSI] bsg: takes a ref to struct device in fops->openFUJITA Tomonori1-6/+13 bsg_register_queue() takes a ref to struct device that a caller passes. For example, bsg takes a ref to the sdev_gendev for scsi devices. However, bsg doesn't inrease the refcount in fops->open. So while an application opens a bsg device, the scsi device that the bsg device holds can go away (bsg also takes a ref to a queue, but it doesn't prevent the device from going away). With this patch, bsg increases the refcount of struct device in fops->open and decreases it in fops->release. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> 2008-04-18ocfs2/net: Add debug interface to o2netSunil Mushran6-3/+569 This patch exposes o2net information via debugfs. The information includes the list of sockets (sock_containers) as well as the list of outstanding messages (send_tracking). Useful for o2dlm debugging. (This patch is derived from an earlier one written by Zach Brown that exposed the same information via /proc.) [Mark: checkpatch fixes] Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Reviewed-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Only build ocfs2/dlm with the o2cb stack moduleMark Fasheh1-1/+1 fs/ocfs2/dlm/ocfs2_dlm.ko and fs/ocfs2/dlm/ocfs2_dlmfs.ko get built if CONFIG_FS_OCFS2 is specified. This isn't quite how it should happen any more - the "o2cb" dlm modules should only be built if CONFIG_FS_OCFS2_O2CB is set, so update the dlm Makefile accordingly. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Joel Becker <joel.becker@oracle.com> 2008-04-18ocfs2/cluster: Get rid of arguments to the timeout routinesJeff Mahoney1-27/+20 We keep seeing bug reports related to NULL pointer derefs in o2net_set_nn_state(). When I originally wrote up the configurable timeout patch, I had tried to plan for multiple clusters. This was silly. The timeout routines all use o2nm_single_cluster so there's no point in passing an argument at all. This patch removes the arguments and kills those bugs dead. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Put tree in MAINTAINERSJoel Becker1-0/+1 The ocfs2 MAINTAINERS entry should have the git tree URL. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Use BUG_ONJulia Lawall2-4/+2 if (...) BUG(); should be replaced with BUG_ON(...) when the test has no side-effects to allow a definition of BUG_ON that drops the code completely. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @ disable unlikely @ expression E,f; @@ ( if (<... f(...) ...>) { BUG(); } | - if (unlikely(E)) { BUG(); } + BUG_ON(E); ) @@ expression E,f; @@ ( if (<... f(...) ...>) { BUG(); } | - if (E) { BUG(); } + BUG_ON(E); ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Convert ocfs2 over to unlocked_ioctlAndi Kleen3-13/+6 As far as I can see there is nothing in ocfs2_ioctl that requires the BKL, so use unlocked_ioctl Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Improve rename lockingJan Kara1-1/+1 ocfs2_rename() was being too aggressive with the rename lock - we only need it for certain forms of directory rename. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18fs/ocfs2/aops.c: test for IS_ERR rather than 0Julia Lawall1-3/+3 The function ocfs2_start_trans always returns either a valid pointer or a value made with ERR_PTR, so its result should be tested with IS_ERR, not with a test for 0. Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Add inode stealing for ocfs2_reserve_new_inodeTao Ma6-5/+116 Inode allocation is modified to look in other nodes allocators during extreme out of space situations. We retry our own slot when space is freed back to the global bitmap, or whenever we've allocated more than 1024 inodes from another slot. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Add ac_alloc_slot in ocfs2_alloc_contextTao Ma3-0/+4 In inode stealing, we no longer restrict the allocation to happen in the local node. So it is neccessary for us to add a new member in ocfs2_alloc_context to indicate which slot we are using for allocation. We also modify the process of local alloc so that this member can be used there also. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Add a new parameter for ocfs2_reserve_suballoc_bitsTao Ma1-4/+18 In some cases(Inode stealing from other nodes), we may not want ocfs2_reserve_suballoc_bits to allocate new groups from the global_bitmap since it may already be full. So add a new parameter for this. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Enable cross extent block merge.Tao Ma1-8/+86 In ocfs2_figure_merge_contig_type, we judge whether there exists a cross extent block merge and enable it by setting CONTIG_LEFT and CONTIG_RIGHT accordingly. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Add support for cross extent blockTao Ma1-41/+325 In ocfs2_merge_rec_left, when we find the merge extent is "CONTIG_RIGHT" with the first extent record of the next extent block, we will merge it to the next extent block and change all the related extent blocks accordingly. In ocfs2_merge_rec_right, when we find the merge extent is "CONTIG_LEFT" with the last extent record of the previous extent block, we will merge it to the prevoius extent block and change all the related extent blocks accordingly. As for CONTIG_LEFTRIGHT, we will handle CONTIG_RIGHT first so that when the index is zero, the merge process will be more efficient and easier. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2: Move /sys/o2cb to /sys/fs/o2cbMark Fasheh4-0/+40 /sys/fs is where we really want file system specific sysfs objects. Ocfs2-tools has been updated to look in /sys/fs/o2cb. We can maintain backwards compatibility with old ocfs2-tools by using a sysfs symlink. After some time (2 years), the symlink can be safely removed. This patch also adds documentation to make it easier for people to figure out what /sys/fs/o2cb is used for. Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18sysfs: Allow removal of symlinks in the sysfs rootMark Fasheh1-1/+8 Allow callers of sysfs_remove_link() to pass a NULL kobj, in which case sysfs_root will be used as the parent directory. This allows us to tear down top level symlinks created via sysfs_create_link(), which already has similar handling of a NULL parent object. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> 2008-04-18ocfs2: Reconnect after idle time out.Tao Ma2-15/+38 Currently, o2net connects to a node on hb_up and disconnects on hb_down and net timeout. It disconnects on net timeout is ok, but it should attempt to reconnect back. This is because sometimes nodes get overloaded enough that the network connection breaks but the disk hb does not. And if we get into that situation, we either fence (unnecessarily) or wait for its disk hb to die (and sometimes hang in the process). So in this updated scheme, when the network disconnects, we keep attempting to reconnect till we succeed or we get a disk hb down event. If the other node is really dead, then we will eventually get a node down event. If not, we should be able to connect again and continue. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Cleanup lockres printSunil Mushran1-11/+11 A previous patch added KERN_NOTICE to printks printing the lockres that cluttered the output. This patch removes the log level. For people concerned with syslog clutter, please note we now use this facility to print lockres only during an error. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Fix lockname in lockres print functionSunil Mushran1-75/+51 __dlm_print_one_lock_resource was printing lockname incorrectly. Also, we now use printk directly instead of mlog as the latter prints the line context which is not useful for this print. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Move dlm_print_one_mle() from dlmmaster.c to dlmdebug.cSunil Mushran3-160/+85 This patch helps in consolidating debugging related functions in dlmdebug.c. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Dumps the purgelist into a debugfs fileSunil Mushran2-0/+72 This patch dumps all the lockres' on the purgelist it can fit in one page into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Dumps the mles into a debugfs fileSunil Mushran2-0/+120 This patch dumps all mles it can fit in one page into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Move struct dlm_master_list_entry to dlmcommon.hSunil Mushran2-37/+35 This patch moves some mle related definitions from dlmmaster.c to dlmcommon.h. Future patches need these definitions to dump mle debugging information. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.beckeroracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Dumps the lockres' into a debugfs fileSunil Mushran2-0/+255 This patch dumps all the lockres' alongwith all the locks into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Dump the dlm state in a debugfs fileSunil Mushran4-0/+325 This patch dumps the dlm state (dlm_ctxt) into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Create debugfs dirsSunil Mushran4-2/+125 This patch creates the debugfs directories that will hold the files to be used to dump the dlm state. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Link all lockres' to a tracking listSunil Mushran3-0/+26 This patch links all the lockres' to a tracking list in dlm_ctxt. We will use this in an upcoming patch that will walk the entire list and to dump the lockres states to a debugfs file. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Create slabcaches for lock and lockresSunil Mushran4-17/+99 This patch makes the o2dlm allocate memory for lockres, lockname and lock structures from slabcaches rather than kmalloc. This allows us to not only make these allocs more efficient but also allows us to track the memory being consumed by these structures. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com> 2008-04-18ocfs2/dlm: Rename slabcache dlm_mle_cache to o2dlm_mleSunil Mushran2-2/+4 This patch renames dlm_mle_slabcache to prevent namespace clashes with fs/dlm. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>