umount: Add -d option to detach vn device #24
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iteratee
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Mar 13, 2024
While there, tweak a bit the assertion and conditional on 'pkt->p_af'.
dragonflybot
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Mar 22, 2024
The '-d' option tells umount(8) to detach the underlying vn(4) device if the filesystem was mounted from it. Note that vn(4) is a virtual disk and can provides multiple filesystems, so the vn(4) detaching can only succeed when all the filesystems are umounted. For example: $ vnconfig -c vn dfly.img vn4 $ mount_msdos /dev/vn4s1 /mnt/dfly/boot $ mount_ufs /dev/vn4s2a /mnt/dfly/root $ umount -d /mnt/dfly/boot umount: VNIOCDETACH: /dev/vn4: Device busy umount: detach of /dev/vn4s1 failed $ umount -d /mnt/dfly/root (now vn4 is detached) A similar option exists in Linux's and FreeBSD's umount(8). GitHub PR: #24 See Also: freebsd/freebsd-src#972
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OK. I've merged this patch with some fixes and changes. There was an issue with the original patch: it was detaching the |
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Add a
-doption to umount to detach a vnode device. A similar option exists in Linux's umount and FreeBSD: freebsd/freebsd-src#972