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| author | Ira Weiny <ira.weiny@intel.com> | 2014-08-08 19:00:56 -0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-08-10 20:36:00 -0700 |
| commit | 1471cb6ca67990a306500e69e52ffb28c93ccbbc (patch) | |
| tree | 6d9dba8e122759ff4a193487aae516a300e563f1 /drivers/infiniband/core/user_mad.c | |
| parent | 0f29b46d49b0ca50536632c6a33986c3171f5ea1 (diff) | |
| download | linux-1471cb6ca67990a306500e69e52ffb28c93ccbbc.tar.gz linux-1471cb6ca67990a306500e69e52ffb28c93ccbbc.tar.bz2 linux-1471cb6ca67990a306500e69e52ffb28c93ccbbc.zip | |
IB/mad: Add user space RMPP support
Using the new registration mechanism, define a flag that indicates the
user wishes to process RMPP messages in user space rather than have
the kernel process them.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/core/user_mad.c')
| -rw-r--r-- | drivers/infiniband/core/user_mad.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c index 11af1c61c135..928cdd20e2d1 100644 --- a/drivers/infiniband/core/user_mad.c +++ b/drivers/infiniband/core/user_mad.c @@ -506,13 +506,15 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf, rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); - if (!ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)) { - copy_offset = IB_MGMT_MAD_HDR; - rmpp_active = 0; - } else { + + if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) + && ib_mad_kernel_rmpp_agent(agent)) { copy_offset = IB_MGMT_RMPP_HDR; rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & - IB_MGMT_RMPP_FLAG_ACTIVE; + IB_MGMT_RMPP_FLAG_ACTIVE; + } else { + copy_offset = IB_MGMT_MAD_HDR; + rmpp_active = 0; } data_len = count - hdr_size(file) - hdr_len; @@ -558,14 +560,22 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf, rmpp_mad->mad_hdr.tid = *tid; } - spin_lock_irq(&file->send_lock); - ret = is_duplicate(file, packet); - if (!ret) + if (!ib_mad_kernel_rmpp_agent(agent) + && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) + && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) { + spin_lock_irq(&file->send_lock); list_add_tail(&packet->list, &file->send_list); - spin_unlock_irq(&file->send_lock); - if (ret) { - ret = -EINVAL; - goto err_msg; + spin_unlock_irq(&file->send_lock); + } else { + spin_lock_irq(&file->send_lock); + ret = is_duplicate(file, packet); + if (!ret) + list_add_tail(&packet->list, &file->send_list); + spin_unlock_irq(&file->send_lock); + if (ret) { + ret = -EINVAL; + goto err_msg; + } } ret = ib_post_send_mad(packet->msg, NULL); |