Commit Graph

91 Commits

Author SHA1 Message Date
Poul-Henning Kamp
7652131bee Initialize struct vfsops C99-sparsely.
Submitted by:   hmp
Reviewed by:	phk
2003-06-12 20:48:38 +00:00
Poul-Henning Kamp
2f613363c7 Remove unused variable.
Found by:       FlexeLint
2003-05-31 19:34:52 +00:00
Alexander Kabaev
c162e9c2eb Rename vfs_stdsync function to vfs_stdnosync which matches more
closely what function is really doing. Update all existing consumers
to use the new name.

Introduce a new vfs_stdsync function, which iterates over mount
point's vnodes and call FSYNC on each one of them in turn.

Make nwfs and smbfs use this new function instead of rolling their
own identical sync implementations.

Reviewed by:	jeff
2003-03-11 22:15:10 +00:00
Nate Lawson
99648386d3 Finish cleanup of vprint() which was begun with changing v_tag to a string.
Remove extraneous uses of vop_null, instead defering to the default op.
Rename vnode type "vfs" to the more descriptive "syncer".
Fix formatting for various filesystems that use vop_print.
2003-03-03 19:15:40 +00:00
Dag-Erling Smørgrav
8994a245e0 Clean up whitespace, s/register //, refrain from strong urge to ANSIfy. 2003-03-02 15:56:49 +00:00
Dag-Erling Smørgrav
c952458814 uiomove-related caddr_t -> void * (just the low-hanging fruit) 2003-03-02 15:50:23 +00:00
Poul-Henning Kamp
9285a87efd NODEVFS cleanup:
Replace devfs_{create,destroy} hooks with direct function calls.
2003-03-02 13:35:30 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Poul-Henning Kamp
6718b083be NODEVFS cleanup: remove #ifdefs. 2003-01-29 22:36:45 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Poul-Henning Kamp
7e760e148a Originally when DEVFS was added, a global variable "devfs_present"
was used to control code which were conditional on DEVFS' precense
since this avoided the need for large-scale source pollution with
#include "opt_geom.h"

Now that we approach making DEVFS standard, replace these tests
with an #ifdef to facilitate mechanical removal once DEVFS becomes
non-optional.

No functional change by this commit.
2003-01-19 11:03:07 +00:00
Poul-Henning Kamp
9c71cb4bef Even if the permissions deny it, a process should be allowed to
access its controlling terminal.

In essense, history dictates that any process is allowed to open
/dev/tty for RW, irrespective of credential, because by definition
it is it's own controlling terminal.

Before DEVFS we relied on a hacky half-device thing (kern/tty_tty.c)
which did the magic deep down at device level, which at best was
disgusting from an architectural point of view.

My first shot at this was to use the cloning mechanism to simply
give people the right tty when they ask for /dev/tty, that's why
you get this, slightly counter intuitive result:

        syv# ls -l /dev/tty `tty`
        crw--w----  1 u1  tty    5,   0 Jan 13 22:14 /dev/tty
        crw--w----  1 u1  tty    5,   0 Jan 13 22:14 /dev/ttyp0

Trouble is, when user u1 su(1)'s to user u2, he cannot open
/dev/ttyp0 anymore because he doesn't have permission to do so.

The above fix allows him to do that.

The interesting side effect is that one was previously only able
to access the controlling tty by indirection:
        date > /dev/tty
but not by name:
        date > `tty`

This is now possible, and that feels a lot more like DTRT.

PR:             46635
MFC candidate:  could be.
2003-01-13 22:20:36 +00:00
Dima Dorfman
797159bde3 Add symlink support to devfs_rule_matchpath(). This allows the user
to unhide symlinks as well as hide them.
2003-01-11 02:36:20 +00:00
Poul-Henning Kamp
c6e3ae999b Since Jeffr made the std* functions the default in rev 1.63 of
kern/vfs_defaults.c it is wrong for the individual filesystems to use
the std* functions as that prevents override of the default.

Found by:       src/tools/tools/vop_table
2003-01-04 08:47:19 +00:00
Robert Watson
adfad1eb35 Trim left-over and unused vop_refreshlabel() bits from devfs.
Reported by:	bde
2002-12-28 05:39:25 +00:00
Robert Watson
990b4b2dc5 Remove dm_root entry from struct devfs_mount. It's never set, and is
unused.  Replace it with a dm_mount back-pointer to the struct mount
that the devfs_mount is associated with.  Export that pointer to MAC
Framework entry points, where all current policies don't use the
pointer.  This permits the SEBSD port of SELinux's FLASK/TE to compile
out-of-the-box on 5.0-CURRENT with full file system labeling support.

Approved by:	re (murray)
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-12-09 03:44:28 +00:00
Robert Watson
763bbd2f4f Slightly change the semantics of vnode labels for MAC: rather than
"refreshing" the label on the vnode before use, just get the label
right from inception.  For single-label file systems, set the label
in the generic VFS getnewvnode() code; for multi-label file systems,
leave the labeling up to the file system.  With UFS1/2, this means
reading the extended attribute during vfs_vget() as the inode is
pulled off disk, rather than hitting the extended attributes
frequently during operations later, improving performance.  This
also corrects sematics for shared vnode locks, which were not
previously present in the system.  This chances the cache
coherrency properties WRT out-of-band access to label data, but in
an acceptable form.  With UFS1, there is a small race condition
during automatic extended attribute start -- this is not present
with UFS2, and occurs because EAs aren't available at vnode
inception.  We'll introduce a work around for this shortly.

Approved by:	re
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-26 14:38:24 +00:00
Robert Watson
e6a5564ee2 Missed a case of _POSIX_MAC_PRESENT -> _PC_MAC_PRESENT rename.
Pointed out by:	phk
2002-10-20 22:50:43 +00:00
Poul-Henning Kamp
bc9d8a9a37 Fix comments and one resulting code confusion about the type of the
"command" argument to VOP_IOCTL.

Spotted by:	FlexeLint.
2002-10-16 08:04:11 +00:00
Poul-Henning Kamp
4cfe209335 A better solution to avoiding variable sized structs in DEVFS. 2002-10-16 07:51:18 +00:00
Poul-Henning Kamp
c122d758ca #include "opt_devfs.h" to protect against variable sized structures.
Spotted by:	FlexeLint
2002-10-16 07:16:47 +00:00
Mike Barcroft
2b7f24d210 Change iov_base's type from char *' to the standard void *'. All
uses of iov_base which assume its type is `char *' (in order to do
pointer arithmetic) have been updated to cast iov_base to `char *'.
2002-10-11 14:58:34 +00:00
Dima Dorfman
e5d09546b8 Treat the pathptrn field as a real pattern with the aid of fnmatch(). 2002-10-08 04:21:54 +00:00
Robert Watson
74e62b1b75 Integrate a devfs/MAC fix from the MAC tree: avoid a race condition during
devfs VOP symlink creation by introducing a new entry point to determine
the label of the devfs_dirent prior to allocation of a vnode for the
symlink.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-05 18:40:10 +00:00
Poul-Henning Kamp
2c5e1d1e6f Move the vop-vector declaration into devfs_vnops.c where it belongs. 2002-10-01 10:08:08 +00:00
Poul-Henning Kamp
19ebba326b s/struct dev_t */dev_t */ 2002-09-28 21:21:01 +00:00
Poul-Henning Kamp
562c866822 Fix mis-indent. 2002-09-28 17:37:55 +00:00
Nate Lawson
86ed6d45ac Remove any VOP_PRINT that redundantly prints the tag.
Move lockmgr_printinfo() into vprint() for everyone's benefit.

Suggested by: bde
2002-09-18 20:42:04 +00:00
Nate Lawson
06be2aaa83 Remove all use of vnode->v_tag, replacing with appropriate substitutes.
v_tag is now const char * and should only be used for debugging.

Additionally:
1. All users of VT_NTS now check vfsconf->vf_type VFCF_NETWORK
2. The user of VT_PROCFS now checks for the new flag VV_PROCDEP, which
is propagated by pseudofs to all child vnodes if the fs sets PFS_PROCDEP.

Suggested by:   phk
Reviewed by:    bde, rwatson (earlier version)
2002-09-14 09:02:28 +00:00
Poul-Henning Kamp
9bf1a75697 Introduce typedefs for the member functions of struct vfsops and employ
these in the main filesystems.  This does not change the resulting code
but makes the source a little bit more grepable.

Sponsored by:	DARPA and NAI Labs.
2002-08-13 10:05:50 +00:00
Jeff Roberson
e6e370a7fe - Replace v_flag with v_iflag and v_vflag
- v_vflag is protected by the vnode lock and is used when synchronization
   with VOP calls is needed.
 - v_iflag is protected by interlock and is used for dealing with vnode
   management issues.  These flags include X/O LOCK, FREE, DOOMED, etc.
 - All accesses to v_iflag and v_vflag have either been locked or marked with
   mp_fixme's.
 - Many ASSERT_VOP_LOCKED calls have been added where the locking was not
   clear.
 - Many functions in vfs_subr.c were restructured to provide for stronger
   locking.

Idea stolen from:	BSD/OS
2002-08-04 10:29:36 +00:00
Robert Watson
67d722ed73 Introduce support for Mandatory Access Control and extensible
kernel access control.

Teach devfs how to respond to pathconf() _POSIX_MAC_PRESENT queries,
allowing it to indicate to user processes that individual vnode labels
are available.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-02 03:12:40 +00:00
Robert Watson
bdc2cd1318 Hook up devfs_pathconf() for specfs devfs nodes, not just regular
devfs nodes.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-01 22:27:57 +00:00
Robert Watson
6742f32809 Introduce support for Mandatory Access Control and extensible
kernel access control.

Instrument devfs to support per-dirent MAC labels.  In particular,
invoke MAC framework when devfs directory entries are instantiated
due to make_dev() and related calls, and invoke the MAC framework
when vnodes are instantiated from these directory entries.  Implement
vop_setlabel() for devfs, which pushes the label update into the
devfs directory entry for semi-persistant store.  This permits the MAC
framework to assign labels to devices and directories as they are
instantiated, and export access control information via devfs vnodes.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-07-31 15:45:16 +00:00
Robert Watson
04f3985d88 Introduce support for Mandatory Access Control and extensible
kernel access control.

Label devfs directory entries, permitting labels to be maintained
on device nodes in devfs instances persistently despite vnode
recycling.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-07-30 23:12:37 +00:00
Dima Dorfman
ec7e38fb22 Correct misindentation of DRA_UID. 2002-07-28 06:57:57 +00:00
Dima Dorfman
af13e3abb9 Unimplement panic(8) by making sure that we don't recurse into a
ruleset.  If we do, that means there's a ruleset loop (10 includes 20
include 30 includes 10), which will quickly cause a double fault due
to stack overflow (since "include" is implemented by recursion).
(Previously, we only checked that X didn't include X.)
2002-07-28 03:52:44 +00:00
Dima Dorfman
a1dc209638 Introduce the DEVFS "rule" subsystem. DEVFS rules permit the
administrator to define certain properties of new devfs nodes before
they become visible to the userland.  Both static (e.g., /dev/speaker)
and dynamic (e.g., /dev/bpf*, some removable devices) nodes are
supported.  Each DEVFS mount may have a different ruleset assigned to
it, permitting different policies to be implemented for things like
jails.

Approved by:	phk
2002-07-17 01:46:48 +00:00
Semen Ustimenko
c83fca1f1f Make devfs to give honour to PDIRUNLOCK flag.
Reviewed by:	jeff
MFC after:	1 week
2002-06-01 09:17:43 +00:00
Maxime Henrion
8eee3a3d58 Fix several bugs in devfs_lookupx(). When we check the nameiop to
make sure it's a correct operation for devfs, do it only in the
ISLASTCN case.  If we don't, we are assuming that the final file will
be in devfs, which is not true if another partition is mounted on top
of devfs or with special filenames (like /dev/net/../../foo).

Reviewed by:	phk
2002-05-10 15:41:14 +00:00
Maxime Henrion
6dbde1fe23 Convert devfs to nmount.
Reviewed by:	phk
2002-05-02 20:27:42 +00:00
Robert Watson
a12cfddc0f Use vnode locking with devfs; permit VFS locking assertions to make
sense for devfs vnodes, and reduce/remove potential races in the devfs
code.

Submitted by:	iadowse
Approved by:	phk
2002-04-29 20:00:39 +00:00
Bruce Evans
4cc6241557 Don't attempt to decvlare M_DEVFS whern MALLOC_DECLARE is not defined.
This fixes warnings that should be errors in fstat.

Reminded by:	alpha tinderbox

Fixed some style bugs (ones near BOF and EOF; there are many more).
2002-04-21 15:47:03 +00:00
Bruce Evans
11257f4d1a Fixed assorted bugs in setting of timestamps in devfs_setattr().
Setting of timestamps on devices had no effect visible to userland
because timestamps for devices were set in places that are never used.
This broke:
- update of file change time after a change of an attribute
- setting of file access and modification times.

The VA_UTIMES_NULL case did not work.  Revs 1.31-1.32 were supposed to
fix this by copying correct bits from ufs, but had little or no effect
because the old checks were not removed.
2002-04-05 15:16:08 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +00:00
Alfred Perlstein
11caded34f Remove __P. 2002-03-19 22:20:14 +00:00
Maxim Konovalov
e9fc9230a6 Be consistent with UFS in a way how devfs_setattr() checks credentials
for chmod(2), chown(2) and utimes(2) with respect to jail(2).

Reviewed by:		rwatson, ru
Not objected by:	phk
Approved by:		ru
2002-03-14 11:18:42 +00:00
Mike Smith
a7489fe56f Add a new sysinit SI_SUB_DEVFS. Devfs hooks into the kernel at SI_ORDER_FIRST,
and devices can be created anytime after that.

Print a warning if an atttempt is made to create a device too early.
2002-01-09 04:58:49 +00:00
Mike Smith
92fef27d97 Use a sysinit to initialise the devfs hooks in kern_conf.c rather than common
variables.

Reviewed by:	phk (in principle)
2002-01-09 01:00:20 +00:00
Dima Dorfman
2ab80ed8cf Address two minor issues: implement the _PC_NAME_MAX and _PC_PATH_MAX
pathconf() variables for directories, and set st_size and st_blocks
(of struct stat) for directories as appropriate.  Note that st_size is
always set to DEV_BSIZE, since the size of the directories is not
currently kept.

Reviewed by:	phk, bde
2001-11-25 21:00:38 +00:00