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2022-01-15all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriateYury Norov1-2/+2
find_first{,_zero}_bit is a more effective analogue of 'next' version if start == 0. This patch replaces 'next' with 'first' where things look trivial. Signed-off-by: Yury Norov <yury.norov@gmail.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
2021-05-07treewide: remove editor modelines and cruftMasahiro Yamada1-3/+1
The section "19) Editor modelines and other cruft" in Documentation/process/coding-style.rst clearly says, "Do not include any of these in source files." I recently receive a patch to explicitly add a new one. Let's do treewide cleanups, otherwise some people follow the existing code and attempt to upstream their favoriate editor setups. It is even nicer if scripts/checkpatch.pl can check it. If we like to impose coding style in an editor-independent manner, I think editorconfig (patch [1]) is a saner solution. [1] https://lore.kernel.org/lkml/20200703073143.423557-1-danny@kdrag0n.dev/ Link: https://lkml.kernel.org/r/20210324054457.1477489-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> [auxdisplay] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-01-31ocfs2: make local header paths relative to C filesMasahiro Yamada1-4/+4
Gang He reports the failure of building fs/ocfs2/ as an external module of the kernel installed on the system: $ cd fs/ocfs2 $ make -C /lib/modules/`uname -r`/build M=`pwd` modules If you want to make it work reliably, I'd recommend to remove ccflags-y from the Makefiles, and to make header paths relative to the C files. I think this is the correct usage of the #include "..." directive. Link: http://lkml.kernel.org/r/20191227022950.14804-1-ghe@suse.com Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Gang He <ghe@suse.com> Reported-by: Gang He <ghe@suse.com> Reviewed-by: Gang He <ghe@suse.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-24ocfs2: further debugfs cleanupsGreg Kroah-Hartman1-5/+2
There is no need to check return value of debugfs_create functions, but the last sweep through ocfs missed a number of places where this was happening. There is also no need to save the individual dentries for the debugfs files, as everything is can just be removed at once when the directory is removed. By getting rid of the file dentries for the debugfs entries, a bit of local memory can be saved as well. [colin.king@canonical.com: ensure ret is set to zero before returning] Link: http://lkml.kernel.org/r/20190807121929.28918-1-colin.king@canonical.com Link: http://lkml.kernel.org/r/20190731132119.GA12603@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Jia Guo <guojia12@huawei.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-12ocfs: no need to check return value of debugfs_create functionsGreg Kroah-Hartman1-8/+2
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Also, because there is no need to save the file dentry, remove all of the variables that were being saved, and just recursively delete the whole directory when shutting down, saving a lot of logic and local variables. [gregkh@linuxfoundation.org: v2] Link: http://lkml.kernel.org/r/20190613055455.GE19717@kroah.com Link: http://lkml.kernel.org/r/20190612152912.GA19151@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Jia Guo <guojia12@huawei.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145Thomas Gleixner1-16/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 021110 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 84 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190524100844.756442981@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-06-12treewide: kmalloc() -> kmalloc_array()Kees Cook1-1/+1
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This patch replaces cases of: kmalloc(a * b, gfp) with: kmalloc_array(a * b, gfp) as well as handling cases of: kmalloc(a * b * c, gfp) with: kmalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kmalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kmalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The tools/ directory was manually excluded, since it has its own implementation of kmalloc(). The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kmalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kmalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kmalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(u8) * COUNT + COUNT , ...) | kmalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kmalloc( - sizeof(char) * COUNT + COUNT , ...) | kmalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kmalloc + kmalloc_array ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kmalloc + kmalloc_array ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kmalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kmalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kmalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kmalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kmalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kmalloc(C1 * C2 * C3, ...) | kmalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kmalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kmalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kmalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kmalloc(sizeof(THING) * C2, ...) | kmalloc(sizeof(TYPE) * C2, ...) | kmalloc(C1 * C2 * C3, ...) | kmalloc(C1 * C2, ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - (E1) * E2 + E1, E2 , ...) | - kmalloc + kmalloc_array ( - (E1) * (E2) + E1, E2 , ...) | - kmalloc + kmalloc_array ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-04-05ocfs2/dlm: wait for dlm recovery done when migrating all lock resourcespiaojun1-0/+15
Wait for dlm recovery done when migrating all lock resources in case that new lock resource left after leaving dlm domain. And the left lock resource will cause other nodes BUG. NodeA NodeB NodeC umount: dlm_unregister_domain() dlm_migrate_all_locks() NodeB down do recovery for NodeB and collect a new lockres form other live nodes: dlm_do_recovery dlm_remaster_locks dlm_request_all_locks: dlm_mig_lockres_handler dlm_new_lockres __dlm_insert_lockres at last NodeA become the master of the new lockres and leave domain: dlm_leave_domain() mount: dlm_join_domain() touch file and request for the owner of the new lockres, but all the other nodes said 'NO', so NodeC decide to be the owner, and send do assert msg to other nodes: dlmlock() dlm_get_lock_resource() dlm_do_assert_master() other nodes receive the msg and found two masters exist. at last cause BUG in dlm_assert_master_handler() -->BUG(); Link: http://lkml.kernel.org/r/5AAA6E25.7090303@huawei.com Fixes: bc9838c4d44a ("dlm: allow dlm do recovery during shutdown") Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com> Acked-by: Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-05ocfs2/dlm: don't handle migrate lockres if already in shutdownJun Piao1-14/+0
We should not handle migrate lockres if we are already in 'DLM_CTXT_IN_SHUTDOWN', as that will cause lockres remains after leaving dlm domain. At last other nodes will get stuck into infinite loop when requsting lock from us. The problem is caused by concurrency umount between nodes. Before receiveing N1's DLM_BEGIN_EXIT_DOMAIN_MSG, N2 has picked up N1 as the migrate target. So N2 will continue sending lockres to N1 even though N1 has left domain. N1 N2 (owner) touch file access the file, and get pr lock begin leave domain and pick up N1 as new owner begin leave domain and migrate all lockres done begin migrate lockres to N1 end leave domain, but the lockres left unexpectedly, because migrate task has passed [piaojun@huawei.com: v3] Link: http://lkml.kernel.org/r/5A9CBD19.5020107@huawei.com Link: http://lkml.kernel.org/r/5A99F028.2090902@huawei.com Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-15ocfs2: no need flush workqueue before destroying itpiaojun1-1/+0
destroy_workqueue() will do flushing work for us. Link: http://lkml.kernel.org/r/59E06476.3090502@huawei.com Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-03-02sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>Ingo Molnar1-0/+1
Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-14locking/atomic, kref: Add kref_read()Peter Zijlstra1-1/+1
Since we need to change the implementation, stop exposing internals. Provide kref_read() to read the current reference count; typically used for debug messages. Kills two anti-patterns: atomic_read(&kref->refcount) kref->refcount.counter Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-10-07fs/ocfs2/dlm: remove deprecated create_singlethread_workqueue()Bhaktipriya Shridhar1-1/+1
The workqueue "dlm_worker" queues a single work item &dlm->dispatched_work and thus it doesn't require execution ordering. Hence, alloc_workqueue has been used to replace the deprecated create_singlethread_workqueue instance. The WQ_MEM_RECLAIM flag has been set to ensure forward progress under memory pressure. Since there are fixed number of work items, explicit concurrency limit is unnecessary here. Link: http://lkml.kernel.org/r/2b5ad8d6688effe1a9ddb2bc2082d26fbbe00302.1472590094.git.bhaktipriya96@gmail.com Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-20qstr: constify instances in ocfs2Al Viro1-3/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-15ocfs2/dlm: fix a variable overflow problem in dlmdomain.cJun Piao1-1/+1
In dlm_send_join_cancels(), node is defined with type unsigned int, but initialized with -1, this will lead variable overflow. Although this won't cause any runtime problem, the code looks a little uncoordinated. Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-15ocfs2/dlm: add DEREF_DONE messagexuejiufei1-1/+10
This series of patches is to fix the dis-order issue of setting/clearing refmap bit described below. Node 1 Node 2(master) dlmlock dlm_do_master_request dlm_master_request_handler -> dlm_lockres_set_refmap_bit dlmlock succeed dlmunlock succeed dlm_purge_lockres dlm_deref_handler -> find lock resource is in DLM_LOCK_RES_SETREF_INPROG state, so dispatch a deref work dlm_purge_lockres succeed. call dlmlock again dlm_do_master_request dlm_master_request_handler -> dlm_lockres_set_refmap_bit deref work trigger, call dlm_lockres_clear_refmap_bit to clear Node 1 from refmap dlm_purge_lockres succeed dlm_send_remote_lock_request return DLM_IVLOCKID because the lockres is not exist BUG if the lockres is $RECOVERY This series of patches add a new message to keep the order of set and clear. Other nodes can purge the lock resource only after the refmap bit on master is cleared. This patch is to add DEREF_DONE message and corresponding handler. Node can purge the lock resource after receiving this message. As a new message is added, so increase the minor number of dlm protocol version. Signed-off-by: xuejiufei <xuejiufei@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-05ocfs2: add uuid to ocfs2 thread name for problem analysisJoseph Qi1-1/+3
A node can mount multiple ocfs2 volumes. And if thread names are same for each volume/domain, it will bring inconvenience when analyzing problems because we have to identify which volume/domain the messages belong to. Since thread name will be printed to messages, so add volume uuid or dlm name to thread name can benefit problem analysis. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Gang He <ghe@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04ocfs2: optimize error handling in dlm_request_joinNorton.Zhu1-32/+39
Currently error handling in dlm_request_join is a little obscure, so optimize it to promote readability. If packet.code is invalid, reset it to JOIN_DISALLOW to keep it meaningful. It only influences the log printing. Signed-off-by: Norton.Zhu <norton.zhu@huawei.com> Cc: Srinivas Eeda <srinivas.eeda@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04ocfs2: remove unneeded code in dlm_register_domain_handlersJoseph Qi1-2/+0
The last goto statement is unneeded, so remove it. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04ocfs2: fix BUG when o2hb_register_callback failsJoseph Qi1-2/+3
In dlm_register_domain_handlers, if o2hb_register_callback fails, it will call dlm_unregister_domain_handlers to unregister. This will trigger the BUG_ON in o2hb_unregister_callback because hc_magic is 0. So we should call o2hb_setup_callback to initialize hc first. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-10ocfs2: dlm: dlmdomain: remove unused functionRickard Strandqvist1-14/+0
Remove dlm_joined() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-10ocfs2: remove unneeded NULL checkDan Carpenter1-1/+1
In commit 1faf289454b9 ("ocfs2_dlm: disallow a domain join if node maps mismatch") we introduced a new earlier NULL check so this one is not needed. Also static checkers complain because we dereference it first and then check for NULL. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09ocfs2: fix deadlock between o2hb thread and o2net_wqJoseph Qi1-1/+1
The following case may lead to o2net_wq and o2hb thread deadlock on o2hb_callback_sem. Currently there are 2 nodes say N1, N2 in the cluster. And N2 down, at the same time, N3 tries to join the cluster. So N1 will handle node down (N2) and join (N3) simultaneously. o2hb o2net_wq ->o2hb_do_disk_heartbeat ->o2hb_check_slot ->o2hb_run_event_list ->o2hb_fire_callbacks ->down_write(&o2hb_callback_sem) ->o2net_hb_node_down_cb ->flush_workqueue(o2net_wq) ->o2net_process_message ->dlm_query_join_handler ->o2hb_check_node_heartbeating ->o2hb_fill_node_map ->down_read(&o2hb_callback_sem) No need to take o2hb_callback_sem in dlm_query_join_handler, o2hb_live_lock is enough to protect live node map. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: xMark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: jiangyiwen <jiangyiwen@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09ocfs2/dlm: refactor error handling in dlm_alloc_ctxtJoseph Qi1-20/+22
Refactoring error handling in dlm_alloc_ctxt to simplify code. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-06ocfs2: remove conversion of total_backoff in dlm_join_domain()Xue jiufei1-3/+2
The unit of total_backoff is msecs not jiffies, so no need to do the conversion. Otherwise, the join timeout is not 90 sec. Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com> Signed-off-by: joyce.xue <xuejiufei@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-04ocfs2: remove some unused codeXue jiufei1-1/+0
dlm_recovery_ctxt.received is unused. ocfs2_should_refresh_lock_res() can only return 0 or 1, so the error handling code in ocfs2_super_lock() is unneeded. Signed-off-by: joyce.xue <xuejiufei@huawei.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-04ocfs2/dlm: disallow node joining when recovery is on goingXue jiufei1-1/+12
We found a race situation when dlm recovery and node joining occurs simultaneously if the network state is bad. N1 N4 start joining dlm and send query join to all live nodes set joining node to N1, return OK send query join to other live nodes and it may take a while call dlm_send_join_assert() to send assert join message when N2 is down, so keep trying to send message to N2 until find N2 is down send assert join message to N3, but connection is down with N3, so it may take a while become the recovery master for N2 and send begin reco message to other nodes in domain map but no N1 connection with N3 is rebuild, then send assert join to N4 call dlm_assert_joined_handler(), add N1 to domain_map dlm recovery done, send finalize message to nodes in domain map, including N1 receiving finalize message, trigger the BUG() because recovery master mismatch. Signed-off-by: joyce.xue <xuejiufei@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-03ocfs2: fix deadlock risk when kmalloc failed in dlm_query_region_handlerZhonghua Guo1-12/+9
In dlm_query_region_handler(), once kmalloc failed, it will unlock dlm_domain_lock without lock first, then deadlock happens. Signed-off-by: Zhonghua Guo <guozhonghua@h3c.com> Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com> Tested-by: Joseph Qi <joseph.qi@huawei.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-03ocfs2: fix null pointer dereference when access dlm_state before launching dlm threadZongxun Wang1-3/+3
When mounting an ocfs2 volume, it will firstly generate a file /sys/kernel/debug/o2dlm/<uuid>/dlm_state, and then launch the dlm thread. So the following situation will cause a null pointer dereference. dlm_debug_init -> access file dlm_state which will call dlm_state_print -> dlm_launch_thread Move dlm_debug_init after dlm_launch_thread and dlm_launch_recovery_thread can fix this issue. Signed-off-by: Zongxun Wang <wangzongxun@huawei.com> Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: remove versioning informationGoldwyn Rodrigues1-4/+1
The versioning information is confusing for end-users. The numbers are stuck at 1.5.0 when the tools version have moved to 1.8.2. Remove the versioning system in the OCFS2 modules and let the kernel version be the guide to debug issues. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Acked-by: Sunil Mushran <sunil.mushran@gmail.com> Cc: Mark Fasheh <mfasheh@suse.com> Acked-by: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11ocfs2: use list_for_each_entry() instead of list_for_each()Dong Fang1-23/+12
[dan.carpenter@oracle.com: fix up some NULL dereference bugs] Signed-off-by: Dong Fang <yp.fangdong@gmail.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Jeff Liu <jeff.liu@oracle.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21ocfs2: remove kfree() redundant null checksTim Gardner1-3/+1
smatch analysis indicates a number of redundant NULL checks before calling kfree(), eg: fs/ocfs2/alloc.c:6138 ocfs2_begin_truncate_log_recovery() info: redundant null check on *tl_copy calling kfree() fs/ocfs2/alloc.c:6755 ocfs2_zero_range_for_truncate() info: redundant null check on pages calling kfree() etc.... [akpm@linux-foundation.org: revert dubious change in ocfs2_begin_truncate_log_recovery()] Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Cc: Mark Fasheh <mfasheh@suse.com> Acked-by: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-05-29ocfs2: trivial endianness misannotationsAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-24ocfs2/cluster: Cluster up now includes network connections tooSunil Mushran1-7/+0
The cluster up check only checks to see if the node is heartbeating or not. If yes it continues assuming that the node is connected to all the nodes. But if that is not the case, the cluster join aborts with a stack of errors that are not easy to comprehend. This patch adds the network connect check upfront and prints the nodes that the node is not yet connected to, before aborting. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
2011-07-24ocfs2/dlm: Trace insert/remove of resource to/from hashSunil Mushran1-7/+12
Add mlog to trace adding and removing the resource from/to the hash table. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
2011-07-24ocfs2/dlm: Clean up messages in o2dlmSunil Mushran1-8/+10
o2dlm messages needed a facelift. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
2011-05-25ocfs2/dlm: Do not migrate resource to a node that is leaving the domainSunil Mushran1-3/+7
During dlm domain shutdown, o2dlm has to free all the lock resources. Ones that have no locks and references are freed. Ones that have locks and/or references are migrated to another node. The first task in migration is finding a target. Currently we scan the lock resource and find one node that either has a lock or a reference. This is not very efficient in a parallel umount case as we might end up migrating the lock resource to a node which itself may have to migrate it to a third node. The patch scans the dlm->exit_domain_map to ensure the target node is not leaving the domain. If no valid target node is found, o2dlm does not migrate the resource but instead waits for the unlock and deref messages that will allow it to free the resource. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
2011-05-25ocfs2/dlm: Add new dlm message DLM_BEGIN_EXIT_DOMAIN_MSGSunil Mushran1-11/+73
This patch adds a new dlm message DLM_BEGIN_EXIT_DOMAIN_MSG and ups the dlm protocol to 1.2. o2dlm sends this new message in dlm_unregister_domain() to mark the beginning of the exit domain. This message is sent to all nodes in the domain. Currently o2dlm has no way of informing other nodes of its impending exit. This information is useful as the other nodes could disregard the exiting node in certain operations. For example, in resource migration. If two or more nodes were umounting in parallel, it would be more efficient if o2dlm were to choose a non-exiting node to be the new master node rather than an exiting one. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
2011-05-13ocfs2/dlm: Use negotiated o2dlm protocol versionSunil Mushran1-1/+2
Patch fixes a bug in the o2dlm protocol negotiation in that it is using the builtin version rather than the negotiated version during the domain join. This causes join errors when a node having kernel >= 2.6.37 joins a cluster with nodes having kernels < 2.6.37. This only affects the o2cb cluster stack. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Reported-by: Jacek Stepniewski <Jacek.Stepniewski@agora.pl> Acked-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
2011-03-28Merge branch 'mlog_replace_for_39' of git://repo.or.cz/taoma-kernel into ocfs2-merge-window-fixJoel Becker1-4/+4
2011-02-22ocfs2/dlm: Move kmalloc() outside the spinlockSunil Mushran1-12/+16
In dlm_query_region_handler(), move the kmalloc outside the spinlock. This allows us to use GFP_KERNEL instead of GFP_ATOMIC. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
2011-02-21ocfs2: Remove ENTRY from masklog.Tao Ma1-4/+4
ENTRY is used to record the entry of a function. But because it is added in so many functions, if we enable it, the system logs get filled up quickly and cause too much I/O. So actually no one can open it for a production system or even for a test. So for mlog_entry_void, we just remove it. for mlog_entry(...), we replace it with mlog(0,...), and they will be replace by trace event later. Signed-off-by: Tao Ma <boyu.mt@taobao.com>
2010-12-16ocfs2/cluster: Pin/unpin o2hb regionsSunil Mushran1-4/+4
This patch adds support for pinning o2hb regions in configfs. Pinning disallows a region to be cleanly stopped as long as it has an active dependent user (read o2dlm). In local heartbeat mode, the region uuid matching the domain name is pinned as long as the o2dlm domain is active. In global heartbeat mode, all regions are pinned as long as there is atleast one dependent user and the region count is 3 or less. All regions are unpinned if the number of dependent users is zero or region count is greater than 3. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-12-16ocfs2/dlm: Cleanup mlogs in dlmthread.c, dlmast.c and dlmdomain.cSunil Mushran1-2/+0
Add the domain name and the resource name in the mlogs. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-11-18fs/ocfs2/dlm: Use GFP_ATOMIC under spin_lockDavid Sterba1-1/+1
coccinelle check scripts/coccinelle/locks/call_kern.cocci found that in fs/ocfs2/dlm/dlmdomain.c an allocation with GFP_KERNEL is done with locks held: dlm_query_region_handler spin_lock(dlm_domain_lock) dlm_match_regions kmalloc(GFP_KERNEL) Change it to GFP_ATOMIC. Signed-off-by: David Sterba <dsterba@suse.cz> CC: Joel Becker <joel.becker@oracle.com> CC: Mark Fasheh <mfasheh@suse.com> CC: ocfs2-devel@oss.oracle.com -- Exists in v2.6.37-rc1 and current linux-next. Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-10-09ocfs2/cluster: Bump up dlm protocol to version 1.1Sunil Mushran1-1/+1
dlm protocol 1.1. activates messages DLM_QUERY_REGION and DLM_QUERY_NODEINFO that are a must for global heartbeat. It also activates o2hb_global_heartbeat_active(). Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
2010-10-07ocfs2/dlm: Add message DLM_QUERY_NODEINFOSunil Mushran1-1/+181
Adds new dlm message DLM_QUERY_NODEINFO that sends the attributes of all registered nodes. This message is sent if the negotiated dlm protocol is 1.1 or higher. If the information of the joining node does not match that of any existing nodes, the join domain request is rejected. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
2010-10-09ocfs2/dlm: Add message DLM_QUERY_REGIONSunil Mushran1-0/+218
Adds new dlm message DLM_QUERY_REGION that sends the names of all active heartbeat regions. This message is only sent in the global heartbeat mode. If the regions in the joining node do not fully match the ones in the active nodes, the join domain request is rejected. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
2010-09-23o2dlm: force free mles during dlm exitSrinivas Eeda1-0/+1
While umounting, a block mle doesn't get freed if dlm is shutdown after master request is received but before assert master. This results in unclean shutdown of dlm domain. This patch frees all mles that lie around after other nodes were notified about exiting the dlm and marking dlm state as leaving. Only block mles are expected to be around, so we log ERROR for other mles but still free them. Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-07-12ocfs2: tighten up strlen() checkingDan Carpenter1-1/+1
This function is only called from one place and it's like this: dlm_register_domain(conn->cc_name, dlm_key, &fs_version); The "conn->cc_name" is 64 characters long. If strlen(conn->cc_name) were equal to O2NM_MAX_NAME_LEN (64) that would be a bug because strlen() doesn't count the NULL character. In fact, if you look how O2NM_MAX_NAME_LEN is used, it mostly describes 64 character buffers. The only exception is nd_name from struct o2nm_node. Anyway I looked into it and in this case the domain string comes from osb->uuid_str in ocfs2_setup_osb_uuid(). That's 32 characters and NULL which easily fits into O2NM_MAX_NAME_LEN. This patch doesn't change how the code works, but I think it makes the code a little cleaner. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
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