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- Adjust locking markup to match the proc markup.

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- Add a comment about the current, unfinished, state of vnode locking.

Suggested by:	bde
This commit is contained in:
Jeff Roberson 2002-08-07 22:05:34 +00:00
parent cb9772d882
commit 780bb93d31
1 changed files with 19 additions and 16 deletions
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35
sys/sys/vnode.h
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@ -95,27 +95,30 @@ struct vpollinfo {
* Reading or writing any of these items requires holding the appropriate lock.
*
* Lock reference:
* V vnode lock
* I inter lock
* F freelist mutex
* M mntvnodes mutex
* P pollinfo lock
* f - freelist mutex
* i - interlock
* m - mntvnodes mutex
* p - pollinfo lock
* v - vnode lock
*
* XXX Not all fields are locked yet and some fields that are marked are not
* locked consistently. This is a work in progress.
*/
struct vnode {
struct mtx v_interlock; /* lock on usecount and flag */
u_long v_iflag; /* I vnode flags (see below) */
int v_usecount; /* I ref count of users */
int v_writecount; /* I ref count of writers */
long v_numoutput; /* I writes in progress */
struct thread *v_vxproc; /* I thread owning VXLOCK */
int v_holdcnt; /* I page & buffer references */
u_long v_vflag; /* V vnode flags */
struct mtx v_interlock; /* lock for "i" things */
u_long v_iflag; /* i vnode flags (see below) */
int v_usecount; /* i ref count of users */
int v_writecount; /* i ref count of writers */
long v_numoutput; /* i writes in progress */
struct thread *v_vxproc; /* i thread owning VXLOCK */
int v_holdcnt; /* i page & buffer references */
u_long v_vflag; /* v vnode flags */
u_long v_id; /* capability identifier */
struct mount *v_mount; /* ptr to vfs we are in */
vop_t **v_op; /* vnode operations vector */
TAILQ_ENTRY(vnode) v_freelist; /* F vnode freelist */
TAILQ_ENTRY(vnode) v_nmntvnodes; /* M vnodes for mount point */
TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
struct buflists v_cleanblkhd; /* SORTED clean blocklist */
struct buf *v_cleanblkroot; /* clean buf splay tree root */
struct buflists v_dirtyblkhd; /* SORTED dirty blocklist */
@ -144,7 +147,7 @@ struct vnode {
TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */
struct vnode *v_dd; /* .. vnode */
u_long v_ddid; /* .. capability identifier */
struct vpollinfo *v_pollinfo; /* P Poll events */
struct vpollinfo *v_pollinfo; /* p Poll events */
struct label v_label; /* MAC label for vnode */
#ifdef DEBUG_LOCKS
const char *filename; /* Source file doing locking */