From 60446067ba7a8e890a91db3b4a7436fe0ebd2dee Mon Sep 17 00:00:00 2001 From: Marc Eshel Date: Mon, 15 Jan 2007 18:33:36 -0500 Subject: [PATCH] gfs2: stop giving out non-cluster-coherent leases Since gfs2 can't prevent conflicting opens or leases on other nodes, we probably shouldn't allow it to give out leases at all. Put the newly defined lease operation into use in gfs2 by turning off lease, unless we're using the "nolock' locking module (in which case all locking is local anyway). Signed-off-by: Marc Eshel Signed-off-by: J. Bruce Fields Cc: Steven Whitehouse --- fs/gfs2/ops_file.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c index 196d83266e..1a5e8e893d 100644 --- a/fs/gfs2/ops_file.c +++ b/fs/gfs2/ops_file.c @@ -488,6 +488,29 @@ static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync) return ret; } +/** + * gfs2_setlease - acquire/release a file lease + * @file: the file pointer + * @arg: lease type + * @fl: file lock + * + * Returns: errno + */ + +static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl) +{ + struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); + + /* + * We don't currently have a way to enforce a lease across the whole + * cluster; until we do, disable leases (by just returning -EINVAL), + * unless the administrator has requested purely local locking. + */ + if (!sdp->sd_args.ar_localflocks) + return -EINVAL; + return setlease(file, arg, fl); +} + /** * gfs2_lock - acquire/release a posix lock on a file * @file: the file pointer @@ -638,6 +661,7 @@ const struct file_operations gfs2_file_fops = { .flock = gfs2_flock, .splice_read = generic_file_splice_read, .splice_write = generic_file_splice_write, + .setlease = gfs2_setlease, }; const struct file_operations gfs2_dir_fops = { -- 2.39.5