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linux-sg2042/fs/ocfs2
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Eric Ren b891fa5024 ocfs2: fix deadlock issue when taking inode lock at vfs entry points 
Commit 743b5f1434 ("ocfs2: take inode lock in ocfs2_iop_set/get_acl()")
results in a deadlock, as the author "Tariq Saeed" realized shortly
after the patch was merged.  The discussion happened here

  https://oss.oracle.com/pipermail/ocfs2-devel/2015-September/011085.html

The reason why taking cluster inode lock at vfs entry points opens up a
self deadlock window, is explained in the previous patch of this series.

So far, we have seen two different code paths that have this issue.

1. do_sys_open
     may_open
      inode_permission
       ocfs2_permission
        ocfs2_inode_lock() <=== take PR
         generic_permission
          get_acl
           ocfs2_iop_get_acl
            ocfs2_inode_lock() <=== take PR

2. fchmod|fchmodat
    chmod_common
     notify_change
      ocfs2_setattr <=== take EX
       posix_acl_chmod
        get_acl
         ocfs2_iop_get_acl <=== take PR
        ocfs2_iop_set_acl <=== take EX

Fixes them by adding the tracking logic (in the previous patch) for these
funcs above, ocfs2_permission(), ocfs2_iop_[set|get]_acl(),
ocfs2_setattr().

Link: http://lkml.kernel.org/r/20170117100948.11657-3-zren@suse.com
Signed-off-by: Eric Ren <zren@suse.com>
Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mfasheh@versity.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>
 		2017-02-22 16:41:27 -08:00
..
cluster locking/atomic, kref: Add kref_read() 2017-01-14 11:37:18 +01:00
dlm locking/atomic, kref: Add kref_read() 2017-01-14 11:37:18 +01:00
dlmfs Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
Kconfig
…
Makefile ocfs2: disable BUG assertions in reading blocks 2016-06-24 17:23:52 -07:00
acl.c ocfs2: fix deadlock issue when taking inode lock at vfs entry points 2017-02-22 16:41:27 -08:00
acl.h ocfs2: fix posix_acl_create deadlock 2016-05-12 15:52:50 -07:00
alloc.c ocfs2: add newlines to some error messages 2016-12-10 12:39:45 -08:00
alloc.h ocfs2: retry on ENOSPC if sufficient space in truncate log 2016-08-02 17:31:41 -04:00
aops.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-12-17 18:44:00 -08:00
aops.h ocfs2: clean up unused 'page' parameter in ocfs2_write_end_nolock() 2016-12-12 18:55:06 -08:00
blockcheck.c ocfs2: kill endianness abuses in blockcheck.c 2012-05-29 23:28:35 -04:00
blockcheck.h
…
buffer_head_io.c block,fs: untangle fs.h and blk_types.h 2016-11-01 09:43:26 -06:00
buffer_head_io.h
…
dcache.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
dcache.h ocfs2: revert iput deferring code in ocfs2_drop_dentry_lock 2014-04-03 16:20:55 -07:00
dir.c ocfs2: fix not enough credit panic 2016-11-11 08:12:37 -08:00
dir.h VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
dlmglue.c ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock 2017-02-22 16:41:27 -08:00
dlmglue.h ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock 2017-02-22 16:41:27 -08:00
export.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
export.h
…
extent_map.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
extent_map.h
…
file.c ocfs2: fix deadlock issue when taking inode lock at vfs entry points 2017-02-22 16:41:27 -08:00
file.h ocfs2: implement the VFS clone_range, copy_range, and dedupe_range features 2016-12-10 12:39:45 -08:00
filecheck.c ocfs2: sysfile interfaces for online file check 2016-03-22 15:36:02 -07:00
filecheck.h ocfs2: sysfile interfaces for online file check 2016-03-22 15:36:02 -07:00
heartbeat.c
…
heartbeat.h
…
inode.c ocfs2: replace CURRENT_TIME macro 2016-12-12 18:55:06 -08:00
inode.h ocfs2: convert inode refcount test to a helper 2016-12-10 12:39:45 -08:00
ioctl.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
ioctl.h
…
journal.c ocfs2: use time64_t to represent orphan scan times 2016-12-12 18:55:06 -08:00
journal.h jbd2: add support for avoiding data writes during transaction commits 2016-04-24 00:56:07 -04:00
localalloc.c ocfs2: fix occurring deadlock by changing ocfs2_wq from global to local 2016-03-25 16:37:42 -07:00
localalloc.h ocfs2: free allocated clusters if error occurs after ocfs2_claim_clusters 2014-02-06 13:48:51 -08:00
locks.c ocfs2: fix flock panic issue 2015-12-29 17:45:49 -08:00
locks.h
…
mmap.c ocfs2: clean up unused 'page' parameter in ocfs2_write_end_nolock() 2016-12-12 18:55:06 -08:00
mmap.h
…
move_extents.c ocfs2: convert inode refcount test to a helper 2016-12-10 12:39:45 -08:00
move_extents.h
…
namei.c ocfs2: replace CURRENT_TIME macro 2016-12-12 18:55:06 -08:00
namei.h ocfs2: do not include dio entry in case of orphan scan 2015-11-05 19:34:48 -08:00
ocfs1_fs_compat.h
…
ocfs2.h ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock 2017-02-22 16:41:27 -08:00
ocfs2_fs.h ocfs2: fix comment in struct ocfs2_extended_slot 2016-05-19 19:12:14 -07:00
ocfs2_ioctl.h
…
ocfs2_lockid.h
…
ocfs2_lockingver.h
…
ocfs2_trace.h switch generic_file_splice_read() to use of ->read_iter() 2016-10-05 18:23:56 -04:00
quota.h quota: constify qtree_fmt_operations structures 2016-01-04 10:58:35 +01:00
quota_global.c ocfs2: Protect periodic quota syncing with s_umount semaphore 2016-11-30 08:36:54 +01:00
quota_local.c ocfs2: Use s_umount for quota recovery protection 2016-11-30 08:37:21 +01:00
refcounttree.c vfs: fix isize/pos/len checks for reflink & dedupe 2016-12-22 23:00:23 -05:00
refcounttree.h ocfs2: implement the VFS clone_range, copy_range, and dedupe_range features 2016-12-10 12:39:45 -08:00
reservations.c ocfs2: make resv_lock spinlock static 2015-02-10 14:30:29 -08:00
reservations.h
…
resize.c ocfs2: solve a problem of crossing the boundary in updating backups 2016-03-25 16:37:42 -07:00
resize.h
…
slot_map.c ocfs2: clean up an unneeded goto in ocfs2_put_slot() 2016-05-19 19:12:14 -07:00
slot_map.h
…
stack_o2cb.c ocfs2: avoid a pointless delay in o2cb_cluster_check() 2015-04-14 16:48:57 -07:00
stack_user.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
stackglue.c ocfs2: fix crash caused by stale lvb with fsdlm plugin 2017-01-10 18:31:54 -08:00
stackglue.h ocfs2: fix crash caused by stale lvb with fsdlm plugin 2017-01-10 18:31:54 -08:00
suballoc.c ocfs2: fix double unlock in case retry after free truncate log 2016-09-19 15:36:17 -07:00
suballoc.h ocfs2: rollback alloc_dinode counts when ocfs2_block_group_set_bits() failed 2014-04-03 16:20:56 -07:00
super.c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2016-12-19 08:23:53 -08:00
super.h ocfs2: fix occurring deadlock by changing ocfs2_wq from global to local 2016-03-25 16:37:42 -07:00
symlink.c vfs: remove ".readlink = generic_readlink" assignments 2016-12-09 16:45:04 +01:00
symlink.h ocfs: simplify symlink handling 2012-05-29 23:28:40 -04:00
sysfile.c ocfs2: avoid system inode ref confusion by adding mutex lock 2014-04-03 16:20:57 -07:00
sysfile.h
…
uptodate.c ocfs2: remove NULL assignments on static 2014-06-04 16:53:53 -07:00
uptodate.h
…
xattr.c ocfs2: convert inode refcount test to a helper 2016-12-10 12:39:45 -08:00
xattr.h ocfs2: fix posix_acl_create deadlock 2016-05-12 15:52:50 -07:00