From dd7447b87c6d6d1afaf25553b0f911853dcc6683 Mon Sep 17 00:00:00 2001 From: Neal H Walfield Date: Tue, 29 Oct 2019 23:56:23 +0100 Subject: libdiskfs: 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(diskfs_S_file_record_lock): Don't set rendezvous to MACH_PORT_NULL. 2018-12-07 Svante Signell * Update copyright years. * dir-lookup.c(diskfs_S_dir_lookup): Call fshelp_rlock_tweak() with new last argument rendezvous = MACH_PORT_NULL. * file-lock.c(diskfs_S_file_lock): Likewise. * file-record-lock.c(diskfs_S_file_record_lock): Likewise. (diskfs_S_file_record_lock): Add new argument mach_port_t rendezvous. 2017-01-05 Svante Signell * Update copyright years and headers. 2016-05-23 Svante Signell * file-lock-stat.c: Port from cthreads to libpthread. * file-lock.c: Likewise. * file-record-lock: Likewise. 2001-04-11 Neal H Walfield * Makefile (FSSRCS): Add file-record-lock.c. * diskfs.h (struct peropen): Change the type of lock_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 (diskfs_S_dir_lookup): Use fshelp_rlock_tweak as fshelp_acquire_lock is now depreciated. * file-lock-stat.c (diskfs_S_file_lock_stat): Total rewrite around the new record locking functions. * file-lock.c (diskfs_S_file_lock): Total rewrite around the new record locking functions. * file-record-lock.c: New file. Implement diskfs_S_file_record_lock. * node-make.c (diskfs_make_node): Initialize userbox with fshelp_rlock_init. * peropen-make.c (diskfs_make_peropen): Initialize lock_status using fshelp_rlock_po_init. * peropen-rele.c (diskfs_release_peropen): Release lock_status using fshelp_rlock_drop_peropen. --- libdiskfs/dir-lookup.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) (limited to 'libdiskfs/dir-lookup.c') diff --git a/libdiskfs/dir-lookup.c b/libdiskfs/dir-lookup.c index 9ebe3b45..16eb22e3 100644 --- a/libdiskfs/dir-lookup.c +++ b/libdiskfs/dir-lookup.c @@ -1,6 +1,7 @@ /* libdiskfs implementation of fs.defs:dir_lookup - Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, - 2002, 2008, 2013, 2014 Free Software Foundation, Inc. + + Copyright (C) 1992-2002, 2008, 2013-2019 + Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as @@ -13,8 +14,7 @@ General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + along with the GNU Hurd. If not, see . */ #include #include @@ -499,12 +499,28 @@ diskfs_S_dir_lookup (struct protid *dircred, if (! err) { newpo = 0; + mach_port_t rendezvous = MACH_PORT_NULL; + struct flock64 lock = + { + l_start: 0, + l_len: 0, + l_whence: SEEK_SET + }; + if (flags & O_EXLOCK) - err = fshelp_acquire_lock (&np->userlock, &newpi->po->lock_status, - &np->lock, LOCK_EX); + { + lock.l_type = F_WRLCK; + err = fshelp_rlock_tweak (&np->userlock, &np->lock, + &newpi->po->lock_status, flags, 0, 0, + F_SETLK64, &lock, rendezvous); + } else if (flags & O_SHLOCK) - err = fshelp_acquire_lock (&np->userlock, &newpi->po->lock_status, - &np->lock, LOCK_SH); + { + lock.l_type = F_RDLCK; + err = fshelp_rlock_tweak (&np->userlock, &np->lock, + &newpi->po->lock_status, flags, 0, 0, + F_SETLK64, &lock, rendezvous); + } } if (! err) -- cgit v1.2.3