src/sys/compat/linux/linux_stats.c, branch releng/6.1

MFC Rev 1.75

2006-03-13T03:04:07+00:00

VFS SMP fixes, stack api, softupdates fixes.

Sponsored by:	Isilon Systems, Inc.
Approved by:	re (scottl)

Actually only protect mount-point if security.jail.enforce_statfs is set to 2.

2005-06-23T22:13:29+00:00

If we don't return statistics about requested file systems, system tools
may not work correctly or at all.

Approved by:	re (scottl)

Rename sysctl security.jail.getfsstatroot_only to security.jail.enforce_statfs

2005-06-09T18:49:19+00:00

and extend its functionality:

value	policy
0	show all mount-points without any restrictions
1	show only mount-points below jail's chroot and show only part of the
	mount-point's path (if jail's chroot directory is /jails/foo and
	mount-point is /jails/foo/usr/home only /usr/home will be shown)
2	show only mount-point where jail's chroot directory is placed.

Default value is 2.

Discussed with:	rwatson

Remove (now) unused argument 'td' from bsd_to_linux_statfs().

2005-05-27T19:25:39+00:00

The code is under '#ifdef not_that_way', but anyway:

2005-05-22T22:30:31+00:00

- Add missing prison_check_mount() check.

If we need to hide fsid, kern_statfs()/kern_fstatfs() will do it for us,

2005-05-22T21:52:30+00:00

so do not duplicate the code in cvtstatfs().
Note, that we now need to clear fsid in freebsd4_getfsstat().

This moves all security related checks from functions like cvtstatfs()
and will allow to add more security related stuff (like statfs(2), etc.
protection for jails) a bit easier.

Neuter the duplicated disk-device magic code for now. Somebody with

2005-03-15T11:58:40+00:00

serious linux-clue is necessary to fix this properly.

Neuter linux_ustat() until somebody finds time to try to fix it.

2005-02-22T13:39:46+00:00

The fundamental problem is that we get only the lower 8 bits of the
minor device number so there is no guarantee that we can actually
find the disk device in question at all.

This was probably a bigger issue pre-GEOM where the upper bits
signaled which slice were in use.

The secondary problem is how we get from (partial) dev_t to vnode.

The correct implementation will involve traversing the mount list
looking for a perfect match or a possible match (for truncated
minor).

- Use kern_{l,f,}stat() and kern_{f,}statfs() functions rather than

2005-02-07T18:47:28+00:00

  duplicating the contents of the same functions inline.
- Consolidate common code to convert a BSD statfs struct to a Linux struct
  into a static worker function.

Match the LINUX32's style with existing style

2005-01-14T04:44:56+00:00

Submitted by:	Jung-uk Kim 

Use positive, not negative logic.