Skip to content

K
Kernel

openeuler / Kernel
12 个月 前同步成功

通知 5
Star 0
Fork 0
K
Kernel

体验新版 GitCode，发现更多精彩内容 >>

切换分支/标签
  1. 25 9月, 2009 1 次提交
    • J
      cifs: convert oplock breaks to use slow_work facility (try #4) · 3bc303c2
      由 Jeff Layton 提交于 
      This is the fourth respin of the patch to convert oplock breaks to
use the slow_work facility.

A customer of ours was testing a backport of one of the earlier
patchsets, and hit a "Busy inodes after umount..." problem. An oplock
break job had raced with a umount, and the superblock got torn down and
its memory reused. When the oplock break job tried to dereference the
inode->i_sb, the kernel oopsed.

This patchset has the oplock break job hold an inode and vfsmount
reference until the oplock break completes.  With this, there should be
no need to take a tcon reference (the vfsmount implicitly holds one
already).

Currently, when an oplock break comes in there's a chance that the
oplock break job won't occur if the allocation of the oplock_q_entry
fails. There are also some rather nasty races in the allocation and
handling these structs.

Rather than allocating oplock queue entries when an oplock break comes
in, add a few extra fields to the cifsFileInfo struct. Get rid of the
dedicated cifs_oplock_thread as well and queue the oplock break job to
the slow_work thread pool.

This approach also has the advantage that the oplock break jobs can
potentially run in parallel rather than be serialized like they are
today.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      3bc303c2
  3. 16 9月, 2009 2 次提交
  5. 30 4月, 2009 2 次提交
  7. 26 12月, 2008 2 次提交
  9. 21 11月, 2008 1 次提交
    • S
      [CIFS] Do not attempt to close invalidated file handles · ddb4cbfc
      由 Steve French 提交于 
      If a connection with open file handles has gone down
and come back up and reconnected without reopening
the file handle yet, do not attempt to send an SMB close
request for this handle in cifs_close.  We were
checking for the connection being invalid in cifs_close
but since the connection may have been reconnected
we also need to check whether the file handle
was marked invalid (otherwise we could close the
wrong file handle by accident).
Acked-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      ddb4cbfc
  11. 17 11月, 2008 1 次提交
  13. 15 11月, 2008 1 次提交
    • J
      cifs: reinstate sharing of SMB sessions sans races · 14fbf50d
      由 Jeff Layton 提交于 
      We do this by abandoning the global list of SMB sessions and instead
moving to a per-server list. This entails adding a new list head to the
TCP_Server_Info struct. The refcounting for the cifsSesInfo is moved to
a non-atomic variable. We have to protect it by a lock anyway, so there's
no benefit to making it an atomic. The list and refcount are protected
by the global cifs_tcp_ses_lock.

The patch also adds a new routines to find and put SMB sessions and
that properly take and put references under the lock.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      14fbf50d
  15. 14 11月, 2008 1 次提交
  17. 12 10月, 2008 1 次提交
  19. 23 9月, 2008 1 次提交
  21. 24 5月, 2008 1 次提交
  23. 29 4月, 2008 1 次提交
  25. 08 2月, 2008 1 次提交
  27. 26 10月, 2007 1 次提交
  29. 29 9月, 2007 1 次提交
  31. 18 7月, 2007 1 次提交
  33. 13 7月, 2007 1 次提交
  35. 10 7月, 2007 1 次提交
  37. 08 7月, 2007 1 次提交
  39. 22 1月, 2007 1 次提交
  41. 08 12月, 2006 2 次提交
  43. 13 10月, 2006 1 次提交
  45. 29 9月, 2006 1 次提交
  47. 01 6月, 2006 1 次提交
  49. 05 3月, 2006 1 次提交
    • S
      [CIFS] Always match oplock break (cache notification) to the right tcp · e77e6f3b
      由 Steve French 提交于 
      session when multiply mounted.

Fixes slow response when cifs client is mounted to shares on multiple
servers and oplock break occurs (usually due to attempt to multiply open a
file).  When treeids on mutiple mounted shares match and we find the wrong
match first, we searched for the wrong cached files to send oplock break
response for which usually meant that no matching file was found and thus
the server would have to timeout the notification.  Oplock break timeout is
about 20 seconds on some servers so this could cause significantly slower
performance on file open calls in a few cases (in particular when multiple
shares are mounted from multiple servers, tree ids match, and we have a
cached file which is later opened multiple times).  This was the most
important of the bugs that was found and fixed at Connectathon
(interoperability testing event) this week.

Acked-by:  Shaggy (shaggy@austin.ibm.com)
Signed-off-by: Steve French (sfrench@us.ibm.com)
      e77e6f3b
  51. 03 3月, 2006 1 次提交
  53. 02 3月, 2006 1 次提交
  55. 24 2月, 2006 1 次提交
  57. 22 2月, 2006 1 次提交
  59. 13 12月, 2005 1 次提交
  61. 04 12月, 2005 1 次提交
  63. 02 12月, 2005 1 次提交
  65. 30 11月, 2005 1 次提交
  67. 12 11月, 2005 1 次提交
  69. 07 11月, 2005 1 次提交
  71. 11 10月, 2005 1 次提交