xenopsd: Support driver domains for PV guests

The case of HVM guests with emulated QEMU networks devices is not yet
handled.

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Allow setting the VIF backend for a network

If, on a network, other_config:backend_vm is set to the UUID of a VM, this VM is
used for the VIF backends (netback) of any VIFs on the network.

This is useful for internal networks (only), since the key is set on a network
rather than on a PIF.

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
CP-2190 for PR-1221: SR alerts for hosts can be configured on the SR now.

To reduce the effort of configuration, whereas previously it was
necessary to configure throughput alerts for an SR on each host
individually, now it is possible to set up a per-host SR throughput
alert for each host connected to an SR by writing to the SR's
other-config:perfmon key.
CI-44: Add an extra field "originator" to session object.

This is a key string used for distinguishing different API users sharing the same login name.

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: Add the originator param to XAPI session creation

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: update internal uses of login_with_password with the originator param

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: update external components and tests with the new originator param

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: Add max_sessions_per_originator config

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: update session create/destory rbac audit functions

Based on some previous patches from Thomas Sanders.

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: it seems making better sense to expire tasks before sessions

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: add max_sessions_per_user_name config variable

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CI-44: expire sessions based on username/originator specific quota

Based on some previous patches by Thomas Sanders.

The current algorithm is implemented as follows:

  * For sessions with their own auth_user_name (other than "root"/""), they will use their independent session quota (Xapi_globs.max_sessions_per_user_name) grouped by their auth_user_name. This can happen in following cases:
    - The session creator uses an external authentication method where the username is not the default
    - The session creator is logged in as local super user (hence no username/password authentication required) but still chooses to pass an independent username argument in purpose (e.g. vmpr, sm)

  * Sessions without independent auth_user_name (e.g. without RBAC, most external API users will have to share the same super user login) can still distiguish themselves using the new "originator" param during session creation. For sessions created with the optional "originator" argument, they will use their independent session quota (Xapi_globs.max_sessions_per_originator) grouped by their originator key.

  * All the rest sessions are in the common session pool, as before, sharing the default session quota (Xapi_globs.max_sessions). Among them, internal sessions will have higher prioirty than the external ones.

Signed-off-by: Zheng Li <zheng.li@eu.citrix.com>
CA-101788: increase xenconsoled default number of fds in xenservices from 1024 to 4096

xenconsoled is currently started in xenservices using the default ulimit -n
value 1024. This aligns well with the limit of 1024 fds that the xenconsoled
select() can handle. Each vm console will tipically use 3 fds (4 if logging
is enabled), limiting the number of consoles in dom0 to a couple of hundred.

The new upstream xenconsoled uses poll() instead of select() and can handle
>1024 fds, as long as its ulimit -n value is properly set up in xenservices.
Increasing this value to 4096 will allow us to have 1000 vm consoles in dom0,
which is more aligned to other values.

Signed-off-by: Marcus Granado <marcus.granado@citrix.com>
CP-4273: add Hotfix_apply to keys_of_features map

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Remove some obsolete FIST points

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Merge pull request #1115 from mcclurmc/cp4273-hotfix-apply-feature

CP-4273: add Hotfix_apply to keys_of_features map
Merge pull request #1111 from mg12/CA-101788

CA-101788: increase xenconsoled default number of fds in xenservices fro...
Merge pull request #1036 from jeromemaloberti/CP-2190-master

CP-2190 for PR-1221: SR alerts for hosts can be configured on the SR now.
Merge pull request #1002 from robhoes/p2p-master

Allow setting the VIF backend for a network
CA-98096: Remove old comments.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>