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829f0bcb5f
To quote from a comment above vput_final: <quote> * XXX Some filesystems pass in an exclusively locked vnode and strongly depend * on the lock being held all the way until VOP_INACTIVE. This in particular * happens with UFS which adds half-constructed vnodes to the hash, where they * can be found by other code. </quote> As is there is no mechanism which allows filesystems to denote that a vnode is fully initialized, consequently problems like the above are only found the hard way(tm). Add rudimentary support for state transitions, which in particular allow to assert the vnode is not legally unlocked until its fate is decided (either construction finishes or vgone is called to abort it). The new field lands in a 1-byte hole, thus it does not grow the struct. Bump __FreeBSD_version to 1400077 Reviewed by: kib (previous version) Tested by: pho Differential Revision: https://reviews.freebsd.org/D37759 |
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