Filesystems which want to use it in limited capacity can employ the
VOP_UNLOCK_FLAGS macro.
Reviewed by: kib (previous version)
Differential Revision: https://reviews.freebsd.org/D21427
The current vnode layout is not smp-friendly by having frequently read data
avoidably sharing cachelines with very frequently modified fields. In
particular v_iflag inspected for VI_DOOMED can be found in the same line with
v_usecount. Instead make it available in the same cacheline as the v_op, v_data
and v_type which all get read all the time.
v_type is avoidably 4 bytes while the necessary data will easily fit in 1.
Shrinking it frees up 3 bytes, 2 of which get used here to introduce a new
flag field with a new value: VIRF_DOOMED.
Reviewed by: kib, jeff
Differential Revision: https://reviews.freebsd.org/D22715
The hardcoded ident is exactly 20 bytes long but sprintf adds terminating zero,
so there is one byte written out of array bounds.As a fix use strncpy it
appends \0 only if space allows and its behavior matches virtio spec:
When VIRTIO_BLK_T_GET_ID is issued, the device identifier, up to 20 bytes, is
written to the buffer. The identifier should be interpreted as an ascii string.
It is terminated with \0, unless it is exactly 20 bytes long.
PR: 202298
Reviewed by: br
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D18852
o Move similar block/networking methods to common file
o Follow r275640 and correct MMIO registers width
o Pass value to MMIO platform_note method.
Sponsored by: DARPA, AFRL
