40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
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From: Mark Fasheh <mfasheh@suse.com>
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Date: Tue Dec 1 16:15:11 PST 2009
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Subject: gfs2: allow spectator mounts for migration to ocfs2
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Patch-mainline: never
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References: FATE#307584
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Lock out all writeable gfs2 mounts. This allows only spectator mounts, which
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should never modify the disks. We do this to support minimal use of GFS2 for
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migration of data. No performance bugs will be fixed. Any writeable mounts
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are strictly prohibited.
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Signed-off-by: Mark Fasheh <mfasheh@suse.com>
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---
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fs/gfs2/ops_fstype.c | 13 +++++++++++++
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1 file changed, 13 insertions(+)
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--- a/fs/gfs2/ops_fstype.c
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+++ b/fs/gfs2/ops_fstype.c
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@@ -1134,6 +1134,19 @@ static int fill_super(struct super_block
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}
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sdp->sd_args = *args;
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+ if (!sdp->sd_args.ar_spectator || !(sb->s_flags & MS_RDONLY) ||
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+ sdp->sd_args.ar_ignore_local_fs) {
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+ printk(KERN_WARNING "Only read-only GFS2 mounts are "
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+ "supported.\nPlease mount with the \"spectator\" and "
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+ "\"ro\" mount options\n");
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+ goto fail;
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+ }
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+
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+ printk(KERN_WARNING
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+ "WARNING: GFS2 mounts are ONLY supported for single-node "
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+ "migration of data!\nNo performance or write bugs will be "
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+ "considered.\n");
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+
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if (sdp->sd_args.ar_spectator) {
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sb->s_flags |= MS_RDONLY;
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set_bit(SDF_NORECOVERY, &sdp->sd_flags);
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