vinvalbuf
—
flushes and invalidates all buffers associated with a
vnode
#include
<sys/param.h>
#include <sys/vnode.h>
int
vinvalbuf
(struct
vnode *vp, int
flags, struct ucred
*cred, int slpflag,
int slptimeo);
The
vinvalbuf
()
function invalidates all of the buffers associated with the given vnode.
This includes buffers on the clean list and the dirty list. If the
V_SAVE
flag is specified then the buffers on the
dirty list are synced prior to being released. If there is a VM Object
associated with the vnode, it is removed.
Its arguments are:
- vp
- A pointer to the vnode whose buffers will be invalidated.
- flags
- The only supported flag is
V_SAVE
and it indicates
that dirty buffers should be synced with the disk.
- cred
- The user credentials that are used to
VOP_FSYNC(9)
buffers if
V_SAVE
is set.
- slpflag
- The slp flag that will be used in the priority of any sleeps in the
function.
- slptimeo
- The timeout for any sleeps in the function.
The vnode is assumed to be locked prior to the call and remains
locked upon return.
Giant must be held by prior to the call and
remains locked upon return.
A 0 value is returned on success.
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, V_SAVE, cred, 0, 0);
VOP_UNLOCK(devvp, 0);
if (error)
return (error);
- [
ENOSPC
]
- The file system is full. (With
V_SAVE
)
- [
EDQUOT
]
- Disc quota exceeded. (With
V_SAVE
)
- [
EWOULDBLOCK
]
- Sleep operation timed out. (See slptimeo)
- [
ERESTART
]
- A signal needs to be delivered and the system call should be restarted.
(With
PCATCH
set in
slpflag)
- [
EINTR
]
- The system has been interrupted by a signal. (With
PCATCH
set in slpflag)