BUF_LOCK(9)            FreeBSD Kernel Developer's Manual           BUF_LOCK(9)

NAME
     BUF_LOCK - locks a buffer

SYNOPSIS
     #include <sys/param.h>
     #include <sys/systm.h>
     #include <sys/uio.h>
     #include <sys/bio.h>
     #include <sys/buf.h>

     int
     BUF_LOCK(struct buf *bp, int locktype);

DESCRIPTION
     The BUF_LOCK() function locks the given buffer.  If the lock is already
     held this call will block until it can acquire the lock unless LK_NOWAIT
     is set.

     Its arguments are:

     bp            The buffer to lock.

     locktype      Flags controlling the type of lock.  See lockmgr(9) for
                   details.

RETURN VALUES
     A value of 0 is returned upon success.  See lockmgr(9) for information on
     non-zero return values.

SEE ALSO
     buf(9), BUF_TIMELOCK(9), BUF_UNLOCK(9), lockmgr(9)

AUTHORS
     This manual page was written by Chad David <davidc@acns.ab.ca>.

FreeBSD 13.1-RELEASE-p6          July 9, 2001          FreeBSD 13.1-RELEASE-p6