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Mount /mnt/scracth with -o sync,nodiscard

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"-o discard" issues UNMAP commands to loopback resulting in punch_hole
on the pinned file in /data. That will break the pinned block map.

Bug: 210589189
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: Ia927c43fc75164ce5929173f5740737eac4de484
This commit is contained in:
Jaegeuk Kim 2021-12-29 13:17:15 -08:00
parent 06db803f32
commit bbad87aeee
1 changed files with 2 additions and 0 deletions
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2
fs_mgr/fs_mgr_overlayfs.cpp
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@ -880,6 +880,8 @@ bool fs_mgr_overlayfs_mount_scratch(const std::string& device_path, const std::s
errno = save_errno; errno = save_errno;
} }
entry.flags &= ~MS_RDONLY; entry.flags &= ~MS_RDONLY;
entry.flags |= MS_SYNCHRONOUS;
entry.fs_options = "nodiscard";
fs_mgr_set_blk_ro(device_path, false); fs_mgr_set_blk_ro(device_path, false);
} }
// check_fs requires apex runtime library // check_fs requires apex runtime library