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02d1aa7af1
Add extensible query device capabilities verb to allow adding new features. ib_uverbs_ex_query_device is added and copy_query_dev_fields is used to copy capability fields to be used by both ib_uverbs_query_device and ib_uverbs_ex_query_device. Following the discussion about this patch [1], the code now validates the command's comp_mask is zero, returning -EINVAL for unknown values, in order to allow extending the verb in the future. The verb also checks the user-space provided response buffer size and only fills in capabilities that will fit in the buffer. In attempt to follow the spirit of presentation [2] by Tzahi Oved that was presented during OpenFabrics Alliance International Developer Workshop 2013, the comp_mask bits will only describe which fields are valid. Furthermore, fields that can simply be cleared when they are not supported, do not require a comp_mask bit at all. The verb returns a response_length field containing the actual number of bytes written by the kernel, so that a newer version running on an older kernel can tell which fields were actually returned. [1] [PATCH v1 0/5] IB/core: extended query device caps cleanup for v3.19 http://thread.gmane.org/gmane.linux.kernel.api/7889/ [2] https://www.openfabrics.org/images/docs/2013_Dev_Workshop/Tues_0423/2013_Workshop_Tues_0830_Tzahi_Oved-verbs_extensions_ofa_2013-tzahio.pdf Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Haggai Eran <haggaie@mellanox.com> Reviewed-by: Yann Droneaud <ydroneaud@opteya.com> Signed-off-by: Roland Dreier <roland@purestorage.com> |
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.. | ||
addr.c | ||
agent.c | ||
agent.h | ||
cache.c | ||
cm.c | ||
cm_msgs.h | ||
cma.c | ||
core_priv.h | ||
device.c | ||
fmr_pool.c | ||
iwcm.c | ||
iwcm.h | ||
iwpm_msg.c | ||
iwpm_util.c | ||
iwpm_util.h | ||
mad.c | ||
mad_priv.h | ||
mad_rmpp.c | ||
mad_rmpp.h | ||
Makefile | ||
multicast.c | ||
netlink.c | ||
packer.c | ||
sa.h | ||
sa_query.c | ||
smi.c | ||
smi.h | ||
sysfs.c | ||
ucm.c | ||
ucma.c | ||
ud_header.c | ||
umem.c | ||
umem_odp.c | ||
umem_rbtree.c | ||
user_mad.c | ||
uverbs.h | ||
uverbs_cmd.c | ||
uverbs_main.c | ||
uverbs_marshall.c | ||
verbs.c |