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Fix remounting snapshots read-write

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It's not enough to preserve/restore MS_RDONLY on the superblock flags
to avoid remounting a snapshot read-write: be explicit about our
intentions to the VFS layer so the readonly bit is updated correctly
in do_remount_sb().

Reviewed-by: Chunwei Chen <tuxoko@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #6510 
Closes #6515
This commit is contained in:
LOLi
2017-08-17 23:28:17 +02:00
committed by Brian Behlendorf
parent a1f3a1c05f
commit 08de8c16f5
4 changed files with 156 additions and 3 deletions
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tests/runfiles/linux.run
+1 -1
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@@ -119,7 +119,7 @@ tests = ['zfs_mount_001_pos', 'zfs_mount_002_pos', 'zfs_mount_003_pos',
'zfs_mount_004_pos', 'zfs_mount_005_pos', 'zfs_mount_007_pos',
'zfs_mount_008_pos', 'zfs_mount_009_neg', 'zfs_mount_010_neg',
'zfs_mount_011_neg', 'zfs_mount_012_neg', 'zfs_mount_all_001_pos',
'zfs_mount_encrypted']
'zfs_mount_encrypted', 'zfs_mount_remount']
[tests/functional/cli_root/zfs_promote]
tests = ['zfs_promote_001_pos', 'zfs_promote_002_pos', 'zfs_promote_003_pos',