Skip to content

R
raspberrypi-kernel

openeuler / raspberrypi-kernel

通知 13
Star 1
Fork 0
R
raspberrypi-kernel
切换分支/标签
  1. 12 6月, 2009 4 次提交
  3. 09 5月, 2009 2 次提交
  5. 21 4月, 2009 1 次提交
  7. 20 4月, 2009 1 次提交
  9. 01 4月, 2009 3 次提交
  11. 28 3月, 2009 1 次提交
  13. 27 3月, 2009 2 次提交
  15. 18 2月, 2009 1 次提交
    • A
      Fix incomplete __mntput locking · 1a88b536
      由 Al Viro 提交于 
      Getting this wrong caused

	WARNING: at fs/namespace.c:636 mntput_no_expire+0xac/0xf2()

due to optimistically checking cpu_writer->mnt outside the spinlock.

Here's what we really want:
 * we know that nobody will set cpu_writer->mnt to mnt from now on
 * all changes to that sucker are done under cpu_writer->lock
 * we want the laziest equivalent of
	spin_lock(&cpu_writer->lock);
	if (likely(cpu_writer->mnt != mnt)) {
		spin_unlock(&cpu_writer->lock);
		continue;
	}
	/* do stuff */
  that would make sure we won't miss earlier setting of ->mnt done by
  another CPU.

Anyway, for now we just move the spin_lock() earlier and move the test
into the properly locked region.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Reported-and-tested-by: NLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      1a88b536
  17. 14 1月, 2009 2 次提交
  19. 01 1月, 2009 1 次提交
  21. 14 11月, 2008 1 次提交
  23. 13 11月, 2008 1 次提交
  25. 23 10月, 2008 3 次提交
  27. 01 8月, 2008 1 次提交
  29. 27 7月, 2008 4 次提交
  31. 14 7月, 2008 1 次提交
  33. 30 4月, 2008 1 次提交
  35. 29 4月, 2008 1 次提交
  37. 28 4月, 2008 1 次提交
  39. 25 4月, 2008 1 次提交
  41. 23 4月, 2008 5 次提交
    • M
      [patch 7/7] vfs: mountinfo: show dominating group id · 97e7e0f7
      由 Miklos Szeredi 提交于 
      Show peer group ID of nearest dominating group that has intersection
with the mount's namespace.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      97e7e0f7
    • R
      [patch 6/7] vfs: mountinfo: add /proc/<pid>/mountinfo · 2d4d4864
      由 Ram Pai 提交于 
      [mszeredi@suse.cz] rewrite and split big patch into managable chunks

/proc/mounts in its current form lacks important information:

 - propagation state
 - root of mount for bind mounts
 - the st_dev value used within the filesystem
 - identifier for each mount and it's parent

It also suffers from the following problems:

 - not easily extendable
 - ambiguity of mountpoints within a chrooted environment
 - doesn't distinguish between filesystem dependent and independent options
 - doesn't distinguish between per mount and per super block options

This patch introduces /proc/<pid>/mountinfo which attempts to address
all these deficiencies.

Code shared between /proc/<pid>/mounts and /proc/<pid>/mountinfo is
extracted into separate functions.

Thanks to Al Viro for the help in getting the design right.
Signed-off-by: NRam Pai <linuxram@us.ibm.com>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      2d4d4864
    • M
      [patch 5/7] vfs: mountinfo: allow using process root · a1a2c409
      由 Miklos Szeredi 提交于 
      Allow /proc/<pid>/mountinfo to use the root of <pid> to calculate
mountpoints.

 - move definition of 'struct proc_mounts' to <linux/mnt_namespace.h>
 - add the process's namespace and root to this structure
 - pass a pointer to 'struct proc_mounts' into seq_operations

In addition the following cleanups are made:

 - use a common open function for /proc/<pid>/{mounts,mountstat}
 - surround namespace.c part of these proc files with #ifdef CONFIG_PROC_FS
 - make the seq_operations structures const
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      a1a2c409
    • M
      [patch 4/7] vfs: mountinfo: add mount peer group ID · 719f5d7f
      由 Miklos Szeredi 提交于 
      Add a unique ID to each peer group using the IDR infrastructure.  The
identifiers are reused after the peer group dissolves.

The IDR structures are protected by holding namepspace_sem for write
while allocating or deallocating IDs.

IDs are allocated when a previously unshared vfsmount becomes the
first member of a peer group.  When a new member is added to an
existing group, the ID is copied from one of the old members.

IDs are freed when the last member of a peer group is unshared.

Setting the MNT_SHARED flag on members of a subtree is done as a
separate step, after all the IDs have been allocated.  This way an
allocation failure can be cleaned up easilty, without affecting the
propagation state.

Based on design sketch by Al Viro.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      719f5d7f
    • M
      [patch 3/7] vfs: mountinfo: add mount ID · 73cd49ec
      由 Miklos Szeredi 提交于 
      Add a unique ID to each vfsmount using the IDR infrastructure.  The
identifiers are reused after the vfsmount is freed.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      73cd49ec
  43. 22 4月, 2008 2 次提交