Function report |
Source Code:fs\block_dev.c |
Create Date:2022-07-28 20:14:46 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:ze_bdev -- lock a filesystem and force it into a consistent state*@bdev: blockdevice to lock* If a superblock is found on this device, we take the s_umount semaphore* on it to make sure nobody unmounts until the snapshot creation is done
Proto:struct super_block *freeze_bdev(struct block_device *bdev)
Type:struct super_block
Parameter:
Type | Parameter | Name |
---|---|---|
struct block_device * | bdev |
536 | error = 0 |
538 | mutex_lock( & Mutex for freeze ) |
539 | If ++ The counter of freeze processes > 1 Then |
546 | If sb Then drop_super(sb) |
549 | Return sb |
555 | If freeze_super Then error = freeze_super(sb) |
559 | If error Then |
566 | out : |
569 | Return sb |
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