ivshmem: add check on protocol version in QEMU

Send a protocol version as the first message from server, clients must
close communication if they don't support this protocol version.  Older
QEMUs should be fine with this change in the protocol since they
overrides their own vm_id on reception of an id associated to no
eventfd.

Signed-off-by: David Marchand <david.marchand@6wind.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
[use fifo_update_and_get()]
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
7 files changed
tree: 95dcbbebbf05b3b91be876b0355e76d9b94d7cc6
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. contrib/
  6. crypto/
  7. default-configs/
  8. disas/
  9. docs/
  10. fpu/
  11. fsdev/
  12. gdb-xml/
  13. hw/
  14. include/
  15. libdecnumber/
  16. linux-headers/
  17. linux-user/
  18. migration/
  19. net/
  20. pc-bios/
  21. po/
  22. qapi/
  23. qga/
  24. qobject/
  25. qom/
  26. roms/
  27. scripts/
  28. slirp/
  29. stubs/
  30. target-alpha/
  31. target-arm/
  32. target-cris/
  33. target-i386/
  34. target-lm32/
  35. target-m68k/
  36. target-microblaze/
  37. target-mips/
  38. target-moxie/
  39. target-openrisc/
  40. target-ppc/
  41. target-s390x/
  42. target-sh4/
  43. target-sparc/
  44. target-tilegx/
  45. target-tricore/
  46. target-unicore32/
  47. target-xtensa/
  48. tcg/
  49. tests/
  50. trace/
  51. ui/
  52. util/
  53. .dir-locals.el
  54. .exrc
  55. .gitignore
  56. .gitmodules
  57. .mailmap
  58. .travis.yml
  59. accel.c
  60. aio-posix.c
  61. aio-win32.c
  62. arch_init.c
  63. async.c
  64. balloon.c
  65. block.c
  66. blockdev-nbd.c
  67. blockdev.c
  68. blockjob.c
  69. bootdevice.c
  70. bt-host.c
  71. bt-vhci.c
  72. Changelog
  73. CODING_STYLE
  74. configure
  75. COPYING
  76. COPYING.LIB
  77. cpu-exec-common.c
  78. cpu-exec.c
  79. cpus.c
  80. cputlb.c
  81. device-hotplug.c
  82. device_tree.c
  83. disas.c
  84. dma-helpers.c
  85. dump.c
  86. exec.c
  87. gdbstub.c
  88. HACKING
  89. hmp-commands-info.hx
  90. hmp-commands.hx
  91. hmp.c
  92. hmp.h
  93. iohandler.c
  94. ioport.c
  95. iothread.c
  96. kvm-all.c
  97. kvm-stub.c
  98. LICENSE
  99. main-loop.c
  100. MAINTAINERS
  101. Makefile
  102. Makefile.objs
  103. Makefile.target
  104. memory.c
  105. memory_mapping.c
  106. module-common.c
  107. monitor.c
  108. nbd.c
  109. numa.c
  110. os-posix.c
  111. os-win32.c
  112. page_cache.c
  113. qapi-schema.json
  114. qdev-monitor.c
  115. qdict-test-data.txt
  116. qemu-bridge-helper.c
  117. qemu-char.c
  118. qemu-doc.texi
  119. qemu-ga.texi
  120. qemu-img-cmds.hx
  121. qemu-img.c
  122. qemu-img.texi
  123. qemu-io-cmds.c
  124. qemu-io.c
  125. qemu-log.c
  126. qemu-nbd.c
  127. qemu-nbd.texi
  128. qemu-options-wrapper.h
  129. qemu-options.h
  130. qemu-options.hx
  131. qemu-seccomp.c
  132. qemu-tech.texi
  133. qemu-timer.c
  134. qemu.nsi
  135. qemu.sasl
  136. qjson.c
  137. qmp-commands.hx
  138. qmp.c
  139. qtest.c
  140. README
  141. rules.mak
  142. softmmu_template.h
  143. spice-qemu-char.c
  144. tcg-runtime.c
  145. tci.c
  146. thread-pool.c
  147. thunk.c
  148. tpm.c
  149. trace-events
  150. translate-all.c
  151. translate-all.h
  152. translate-common.c
  153. user-exec.c
  154. VERSION
  155. version.rc
  156. vl.c
  157. xen-common-stub.c
  158. xen-common.c
  159. xen-hvm-stub.c
  160. xen-hvm.c
  161. xen-mapcache.c