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reread-partition-table: take exclusive lock when requested

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Before aa47d8ade1, we took an exclusive lock
for the whole block device, but with the commit, a shared lock is taken.
That causes, during we requesting the kernel to reread partition table,
udev workers can process the block device or its partitions.

Let's make udev workers not process block devices during rereading
partition table again.

Follow-up for aa47d8ade1.
This commit is contained in:
Yu Watanabe
2025-10-31 17:12:44 +01:00
committed by Lennart Poettering
parent 0885e4a6e7
commit 9011b1cfc0
1 changed files with 1 additions and 1 deletions
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src/shared/reread-partition-table.c
+1 -1
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@@ -259,7 +259,7 @@ static int reread_partition_table_full(sd_device *dev, int fd, RereadPartitionTa
if (lock_fd < 0)
return log_device_debug_errno(dev, r, "Failed top open lock fd for block device '%s': %m", p);
if (flock(lock_fd, LOCK_SH|LOCK_NB) < 0)
if (flock(lock_fd, LOCK_EX|LOCK_NB) < 0)
return log_device_debug_errno(dev, errno, "Failed to take BSD lock on block device '%s': %m", p);
}