iscsi: add support for iSCSI NOPs [v2]

This patch will send NOP-Out PDUs every 5 seconds to the iSCSI target.
If a consecutive number of NOP-In replies fail a reconnect is initiated.
iSCSI NOPs help to ensure that the connection to the target is still operational.
This should not, but in reality may be the case even if the TCP connection is still
alive if there are bugs in either the target or the initiator implementation.

v2:
 - track the NOPs inside libiscsi so libiscsi can reset the counter
   in case it initiates a reconnect.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed
tree: 205ceec23470140440d8dee9a7456f31b63b3b97
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. default-configs/
  6. disas/
  7. docs/
  8. fpu/
  9. fsdev/
  10. gdb-xml/
  11. hw/
  12. include/
  13. ldscripts/
  14. libcacard/
  15. linux-headers/
  16. linux-user/
  17. net/
  18. pc-bios/
  19. qapi/
  20. qga/
  21. QMP/
  22. qom/
  23. roms/
  24. scripts/
  25. slirp/
  26. stubs/
  27. sysconfigs/
  28. target-alpha/
  29. target-arm/
  30. target-cris/
  31. target-i386/
  32. target-lm32/
  33. target-m68k/
  34. target-microblaze/
  35. target-mips/
  36. target-openrisc/
  37. target-ppc/
  38. target-s390x/
  39. target-sh4/
  40. target-sparc/
  41. target-unicore32/
  42. target-xtensa/
  43. tcg/
  44. tests/
  45. trace/
  46. ui/
  47. .exrc
  48. .gitignore
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  50. .mailmap
  51. acl.c
  52. aes.c
  53. aio-posix.c
  54. aio-win32.c
  55. arch_init.c
  56. async.c
  57. balloon.c
  58. bitmap.c
  59. bitops.c
  60. block-migration.c
  61. block.c
  62. blockdev-nbd.c
  63. blockdev.c
  64. blockjob.c
  65. bt-host.c
  66. bt-vhci.c
  67. cache-utils.c
  68. Changelog
  69. cmd.c
  70. cmd.h
  71. CODING_STYLE
  72. compatfd.c
  73. configure
  74. COPYING
  75. COPYING.LIB
  76. coroutine-gthread.c
  77. coroutine-sigaltstack.c
  78. coroutine-ucontext.c
  79. coroutine-win32.c
  80. cpu-exec.c
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  91. event_notifier-posix.c
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  93. exec.c
  94. gdbstub.c
  95. HACKING
  96. hmp-commands.hx
  97. hmp.c
  98. hmp.h
  99. host-utils.c
  100. iohandler.c
  101. ioport.c
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  103. json-lexer.c
  104. json-parser.c
  105. json-streamer.c
  106. kvm-all.c
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  108. LICENSE
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  114. memory.c
  115. memory_mapping-stub.c
  116. memory_mapping.c
  117. migration-exec.c
  118. migration-fd.c
  119. migration-tcp.c
  120. migration-unix.c
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  123. monitor.c
  124. nbd.c
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  126. os-posix.c
  127. os-win32.c
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  129. oslib-posix.c
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  131. page_cache.c
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  133. pci-ids.txt
  134. qapi-schema-test.json
  135. qapi-schema.json
  136. qbool.c
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  139. qemu-bridge-helper.c
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  141. qemu-config.c
  142. qemu-coroutine-io.c
  143. qemu-coroutine-lock.c
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  147. qemu-error.c
  148. qemu-img-cmds.hx
  149. qemu-img.c
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  153. qemu-nbd.c
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  155. qemu-option.c
  156. qemu-options-wrapper.h
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  159. qemu-progress.c
  160. qemu-seccomp.c
  161. qemu-sockets.c
  162. qemu-tech.texi
  163. qemu-thread-posix.c
  164. qemu-thread-win32.c
  165. qemu-timer-common.c
  166. qemu-timer.c
  167. qemu-tool.c
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  169. qemu.sasl
  170. qerror.c
  171. qfloat.c
  172. qint.c
  173. qjson.c
  174. qlist.c
  175. qmp-commands.hx
  176. qmp.c
  177. qstring.c
  178. qtest.c
  179. readline.c
  180. README
  181. rules.mak
  182. savevm.c
  183. spice-qemu-char.c
  184. tcg-runtime.c
  185. tci.c
  186. thread-pool.c
  187. thunk.c
  188. TODO
  189. trace-events
  190. trace.h
  191. translate-all.c
  192. translate-all.h
  193. uri.c
  194. user-exec.c
  195. VERSION
  196. version.rc
  197. vl.c
  198. xen-all.c
  199. xen-mapcache.c
  200. xen-stub.c