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Updates for changes made by KSE import.

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Submitted by:	Chad David <davidc@acns.ab.ca>
This commit is contained in:
Sheldon Hearn 2001-10-06 11:19:41 +00:00
parent 8975eded26
commit 211ab8715e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=84585
6 changed files with 36 additions and 40 deletions
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28
share/man/man9/lockmgr.9
View file

@ -36,7 +36,7 @@
.In sys/types.h
.In sys/lockmgr.h
.Ft int
.Fn lockmgr "struct lock *lkp" "u_int flags" "struct mtx *interlkp" "struct proc *p"
.Fn lockmgr "struct lock *lkp" "u_int flags" "struct mtx *interlkp" "struct thread *td"
.Sh DESCRIPTION
The
.Fn lockmgr
@ -47,7 +47,7 @@ Locks can also be upgraded and downgraded.
Its arguments are:
.Bl -tag -width ".Fa interlkp"
.It Fa lkp
A pointer to lock to manipulate.
A pointer to the lock to manipulate.
.It Fa flags
Flags indicating what action is to be taken.
.Bl -tag -width ".Dv LK_EXCLUPGRADE"
@ -62,15 +62,13 @@ is not set we will panic.
.It Dv LK_DOWNGRADE
Downgrade our exclusive lock to a shared lock.
Downgrading a shared lock is not valid.
If the exclusive lock has been recursed, all references will
be downgraded.
If the exclusive lock has been recursed, all references will be downgraded.
.It Dv LK_EXCLUPGRADE
Upgrade our lock to an exclusive lock.
Will fail with
.Er EBUSY
if there is someone ahead of use waiting for an upgrade.
If this call fails we loose
our shared lock.
If this call fails we loose our shared lock.
Upgrading an exclusive lock will cause a panic.
.It Dv LK_UPGRADE
Upgrades our lock to an exclusive lock.
@ -79,12 +77,11 @@ our shared lock.
Upgrading an exclusive lock will cause a panic.
.It Dv LK_RELEASE
Release the lock.
Releasing a lock that you do not hold can cause
a panic.
Releasing a lock that you do not hold can cause a panic.
.It Dv LK_DRAIN
Waits for all activity on the lock to end, and then marks it decommissioned.
This is used before freeing a lock that is part of a piece of memory that is about to
be freed.
This is used before freeing a lock that is part of a piece of memory that is
about to be freed.
(As documented in
.Pa sys/lockmgr.h . )
.It Dv LK_SLEEPFAIL
@ -94,8 +91,7 @@ Do not allow the call to sleep.
This can be used to test the lock.
.It Dv LK_CANRECURSE
It is ok to recurse on an exclusive lock.
For every lock there
must be a release.
For every lock there must be a release.
.It Dv LK_INTERLOCK
Unlock the interlock, which is of course locked already.
.El
@ -110,8 +106,8 @@ assumes
is currently owned and not recursed, and will return it unlocked.
See
.Xr mtx_assert 9 .
.It Fa p
The process responsible for this call.
.It Fa td
The thread responsible for this call.
.Dv NULL
becomes
.Dv LK_KERNPROC .
@ -138,8 +134,8 @@ Either
.Dv LK_NOWAIT
was specified and
.Fn lockmgr
would have slept, or another
process was ahead of you in line for an exclusive upgrade.
would have slept, or another thread was ahead of you in line for an exclusive
upgrade.
.It Bq Er ENOLCK
.Dv LK_SLEEP_FAIL
was set and we slept.

18
share/man/man9/lockstatus.9
View file

@ -36,22 +36,22 @@
.In sys/types.h
.In sys/lockmgr.h
.Ft int
.Fn lockstatus "struct lock *lkp" "struct proc *p"
.Fn lockstatus "struct lock *lkp" "struct thread *td"
.Sh DESCRIPTION
The
.Fn lockstatus
function returns the status of the lock in relation to the
.Vt proc
.Vt thread
passed to it.
.Pp
Its arguments are:
.Bl -tag -width ".Fa lkp"
.It Fa lkp
The lock to return the status of.
.It Fa p
The process to check any exclusive locks against.
.It Fa td
The thread to check any exclusive locks against.
If
.Fa p
.Fa td
is
.Dv NULL
and an exclusive lock is held,
@ -61,12 +61,12 @@ is returned.
.Sh RETURN VALUES
.Bl -tag -width ".Dv LK_EXCLUSIVE"
.It Dv LK_EXCLUSIVE
An exclusive lock is held by the process
.Fa p
An exclusive lock is held by the thread
.Fa td
passed in.
.It Dv LK_EXCLOTHER
An exclusive lock is held by someone other then the process
.Fa p
An exclusive lock is held by someone other then the thread
.Fa td
passed in.
.It Dv LK_SHARED
A shared lock is held.

6
share/man/man9/vfs_busy.9
View file

@ -36,7 +36,7 @@
.In sys/param.h
.In sys/mount.h
.Ft int
.Fn vfs_busy "struct mount *mp" "int flags" "struct mtx *interlkp" "struct proc *p"
.Fn vfs_busy "struct mount *mp" "int flags" "struct mtx *interlkp" "struct thread *td"
.Sh DESCRIPTION
The
.Fn vfs_busy
@ -77,8 +77,8 @@ the mount point is being unmounted and
.Dv LK_NOWAIT
is not set then
interlock must be valid locked mutex.
.It Fa p
The process responsible for this call.
.It Fa td
The thread responsible for this call.
.El
.Sh LOCKS
If

6
share/man/man9/vfs_mount.9
View file

@ -36,7 +36,7 @@
.In sys/param.h
.In sys/mount.h
.Ft int
.Fn vfs_mount "struct proc *p" "char *fstype" "char *fspath" "int fsflags" "void *fsdata"
.Fn vfs_mount "struct thread *td" "char *fstype" "char *fspath" "int fsflags" "void *fsdata"
.Sh DESCRIPTION
The
.Fn vfs_mount
@ -52,8 +52,8 @@ system call.
.Pp
Its arguments are:
.Bl -tag -width ".Fa fsflags"
.It Fa p
The process responsible for this call.
.It Fa td
The thread responsible for this call.
.It Fa fstype
The type of filesystem being mounted.
.It Fa fspath

6
share/man/man9/vfs_unbusy.9
View file

@ -36,7 +36,7 @@
.In sys/param.h
.In sys/mount.h
.Ft void
.Fn vfs_unbusy "struct mount *mp" "struct proc *p"
.Fn vfs_unbusy "struct mount *mp" "struct thread *td"
.Sh DESCRIPTION
The
.Fn vfs_unbusy
@ -50,8 +50,8 @@ Its arguments are:
.Bl -tag -width ".Fa mp"
.It Fa mp
The mount point to unbusy (unlock).
.It Fa p
The process responsible for this call.
.It Fa td
The thread responsible for this call.
.El
.Sh LOCKS
.Va mnt_lock

12
share/man/man9/vinvalbuf.9
View file

@ -36,7 +36,7 @@
.In sys/param.h
.In sys/vnode.h
.Ft int
.Fn vinvalbuf "struct vnode *vp" "int flags" "struct ucred *cred" "struct proc *p" "int slpflag" "int slptimeo"
.Fn vinvalbuf "struct vnode *vp" "int flags" "struct ucred *cred" "struct thread *td" "int slpflag" "int slptimeo"
.Sh DESCRIPTION
The
.Fn vinvalbuf
@ -62,8 +62,8 @@ The user credentials that are used to
buffers if
.Dv V_SAVE
is set.
.It Fa p
The process responsible for this call.
.It Fa td
The thread responsible for this call.
.It Fa slpflag
The slp flag that will be used in the priority of any sleeps in the function.
.It Fa slptimeo
@ -78,9 +78,9 @@ must be held by prior to the call and remains locked upon return.
A 0 value is returned on success.
.Sh PSEUDOCODE
.Bd -literal -offset indent
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0);
VOP_UNLOCK(devvp, 0, p);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0);
VOP_UNLOCK(devvp, 0, td);
if (error)
return (error);
.Ed