From 40ab805df48b2f65d5028ba59063e2a36f19f452 Mon Sep 17 00:00:00 2001 From: Svante Signell Date: Wed, 30 Oct 2019 02:33:27 +0100 Subject: libnetfs: Support for file record locking 2019-03-04 Svante Signell * file-lock.c: Make flock work regardless of the mode in which the file was opened. 2019-02-12 Svante Signell * file-lock.c: Comment out "Make flock work without R or W mode" 2019-02-01 Svante Signell * Update copyright years. * file-record-lock.c(netfs_S_file_record_lock): Don't set rendezvous to MACH_PORT_NULL. 2017-01-05 Svante Signell * Update copyright years and headers. * dir-lookup.c(netfs_S_dir_lookup): Call fshelp_rlock_tweak() with new last argument rendezvous = MACH_PORT_NULL. * file-lock.c(netfs_S_file_lock): Likewise. * file-record-lock.c(netfs_S_file_record_lock): Likewise. (netfs_S_file_record_lock): Add new argument mach_port_t rendezvous. 2016-05-23 Svante Signell * netfs.h (struct peropen): Change the type of rlock_status from an int to a struct rlock_peropen. (struct node): Change the type of userbox from a struct lock_box to a struct rlock_box. * dir-lookup.c (netfs_S_dir_lookup): Use fshelp_rlock_tweak. * file-lock-stat.c (netfs_S_file_lock_stat): Total rewrite around the new record locking functions. * file-lock.c (netfs_S_file_lock): Likewise. * file-record-lock.c (netfs_S_file_record_lock): Likewise. * make-node.c (netfs_make_node): Initialize userbox with fshelp_rlock_init. * make-peropen.c (netfs_make_peropen): Initialize lock_status using fshelp_rlock_po_init. (netfs_make_peropen): Add a comment that po->refcnt starts at zero. * relese-peropen.c (netfs_release_peropen): Release lock_status using fshelp_rlock_drop_peropen. 2001-04-11 Neal H Walfield * file-record-lock.c: New file. Implement netfs_S_file_record_lock. * Makefile (SRCS): Add file-record-lock.c --- libnetfs/file-record-lock.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 libnetfs/file-record-lock.c (limited to 'libnetfs/file-record-lock.c') diff --git a/libnetfs/file-record-lock.c b/libnetfs/file-record-lock.c new file mode 100644 index 00000000..049fc139 --- /dev/null +++ b/libnetfs/file-record-lock.c @@ -0,0 +1,44 @@ +/* Copyright (C) 2001, 2014-2019 Free Software Foundation, Inc. + + Written by Neal H Walfield + + This file is part of the GNU Hurd. + + The GNU Hurd is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + The GNU Hurd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with the GNU Hurd. If not, see . */ + +#include "netfs.h" + +#include + +error_t +netfs_S_file_record_lock (struct protid *cred, + int cmd, + struct flock64 *lock, + mach_port_t rendezvous) +{ + struct node *node; + error_t err; + + if (! cred) + return EOPNOTSUPP; + + node = cred->po->np; + pthread_mutex_lock (&node->lock); + err = fshelp_rlock_tweak (&node->userlock, &node->lock, + &cred->po->lock_status, cred->po->openstat, + node->nn_stat.st_size, cred->po->filepointer, + cmd, lock, rendezvous); + pthread_mutex_unlock (&node->lock); + return err; +} -- cgit v1.2.3