growfs: allow operation on RW-mounted filesystems

[emaste]

Summary

growfs supports growing mounted filesystems (writes are temporarily suspended while the grow happens). Drop the check for fs_clean == 0 to restore this case. Leave fs_flags check for FS_UNCLEAN or FS_NEEDSFSCK which represent the state of the filesystem when it was mounted, and fsck should be run first if they are set.

PR: 253754
Fixes: 6eb925f8450f ("Filesystem utilities that modify the...")

[emaste]

sbin/growfs/growfs.c

1464

"Check for filesystem that was unclean at mount time." perhaps?

[f0andrey_gmail.com]

Thanks, this fix live growfs

[mckusick]

I agree that this change is appropriate.