mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 20:51:11 +00:00
131 lines
3.7 KiB
Plaintext
131 lines
3.7 KiB
Plaintext
/* @(#)klm_prot.x 2.1 88/08/01 4.0 RPCSRC */
|
|
|
|
/*
|
|
* Kernel/lock manager protocol definition
|
|
* Copyright (c) 2010, Oracle America, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
* * Neither the name of the "Oracle America, Inc." nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* protocol used between the UNIX kernel (the "client") and the
|
|
* local lock manager. The local lock manager is a deamon running
|
|
* above the kernel.
|
|
*/
|
|
|
|
const LM_MAXSTRLEN = 1024;
|
|
|
|
/*
|
|
* lock manager status returns
|
|
*/
|
|
enum klm_stats {
|
|
klm_granted = 0, /* lock is granted */
|
|
klm_denied = 1, /* lock is denied */
|
|
klm_denied_nolocks = 2, /* no lock entry available */
|
|
klm_working = 3 /* lock is being processed */
|
|
};
|
|
|
|
/*
|
|
* lock manager lock identifier
|
|
*/
|
|
struct klm_lock {
|
|
string server_name<LM_MAXSTRLEN>;
|
|
netobj fh; /* a counted file handle */
|
|
int pid; /* holder of the lock */
|
|
unsigned l_offset; /* beginning offset of the lock */
|
|
unsigned l_len; /* byte length of the lock;
|
|
* zero means through end of file */
|
|
};
|
|
|
|
/*
|
|
* lock holder identifier
|
|
*/
|
|
struct klm_holder {
|
|
bool exclusive; /* FALSE if shared lock */
|
|
int svid; /* holder of the lock (pid) */
|
|
unsigned l_offset; /* beginning offset of the lock */
|
|
unsigned l_len; /* byte length of the lock;
|
|
* zero means through end of file */
|
|
};
|
|
|
|
/*
|
|
* reply to KLM_LOCK / KLM_UNLOCK / KLM_CANCEL
|
|
*/
|
|
struct klm_stat {
|
|
klm_stats stat;
|
|
};
|
|
|
|
/*
|
|
* reply to a KLM_TEST call
|
|
*/
|
|
union klm_testrply switch (klm_stats stat) {
|
|
case klm_denied:
|
|
struct klm_holder holder;
|
|
default: /* All other cases return no arguments */
|
|
void;
|
|
};
|
|
|
|
|
|
/*
|
|
* arguments to KLM_LOCK
|
|
*/
|
|
struct klm_lockargs {
|
|
bool block;
|
|
bool exclusive;
|
|
struct klm_lock alock;
|
|
};
|
|
|
|
/*
|
|
* arguments to KLM_TEST
|
|
*/
|
|
struct klm_testargs {
|
|
bool exclusive;
|
|
struct klm_lock alock;
|
|
};
|
|
|
|
/*
|
|
* arguments to KLM_UNLOCK
|
|
*/
|
|
struct klm_unlockargs {
|
|
struct klm_lock alock;
|
|
};
|
|
|
|
program KLM_PROG {
|
|
version KLM_VERS {
|
|
|
|
klm_testrply KLM_TEST (struct klm_testargs) = 1;
|
|
|
|
klm_stat KLM_LOCK (struct klm_lockargs) = 2;
|
|
|
|
klm_stat KLM_CANCEL (struct klm_lockargs) = 3;
|
|
/* klm_granted=> the cancel request fails due to lock is already granted */
|
|
/* klm_denied=> the cancel request successfully aborts
|
|
lock request */
|
|
|
|
klm_stat KLM_UNLOCK (struct klm_unlockargs) = 4;
|
|
} = 1;
|
|
} = 100020;
|