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qemu / qemu / 13344f3a17e0a785c0eb8e36f69518f21aa8a91a
commit13344f3a17e0a785c0eb8e36f69518f21aa8a91a[log] [tgz]
authorStefan Hajnoczi <stefanha@redhat.com>Tue Jun 17 14:32:05 2014 +0800
committerKevin Wolf <kwolf@redhat.com>Fri Jun 27 18:20:29 2014 +0200
treec976718dcb484d41f0db5786fd452eed821043b9
parentac46821f2c6eb0617ac911daff111cbc30a4c40c [diff]
block: acquire AioContext in qmp_query_blockstats()

Make query-blockstats safe for dataplane by acquiring the
BlockDriverState's AioContext.  This ensures that the dataplane IOThread
and the main loop's monitor code do not race.

Note the assumption that acquiring the drive's BDS AioContext also
protects ->file and ->backing_hd.  This assumption is made by other
aio_context_acquire() callers too.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Tested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
1 file changed
tree: c976718dcb484d41f0db5786fd452eed821043b9
  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. libcacard/
  14. libdecnumber/
  15. linux-headers/
  16. linux-user/
  17. net/
  18. pc-bios/
  19. po/
  20. qapi/
  21. qga/
  22. qobject/
  23. qom/
  24. roms/
  25. scripts/
  26. slirp/
  27. stubs/
  28. sysconfigs/
  29. target-alpha/
  30. target-arm/
  31. target-cris/
  32. target-i386/
  33. target-lm32/
  34. target-m68k/
  35. target-microblaze/
  36. target-mips/
  37. target-moxie/
  38. target-openrisc/
  39. target-ppc/
  40. target-s390x/
  41. target-sh4/
  42. target-sparc/
  43. target-unicore32/
  44. target-xtensa/
  45. tcg/
  46. tests/
  47. trace/
  48. ui/
  49. util/
  50. dtc
  51. pixman
  52. .exrc
  53. .gitignore
  54. .gitmodules
  55. .mailmap
  56. .travis.yml
  57. aio-posix.c
  58. aio-win32.c
  59. arch_init.c
  60. async.c
  61. balloon.c
  62. block-migration.c
  63. block.c
  64. blockdev-nbd.c
  65. blockdev.c
  66. blockjob.c
  67. bt-host.c
  68. bt-vhci.c
  69. Changelog
  70. CODING_STYLE
  71. configure
  72. COPYING
  73. COPYING.LIB
  74. coroutine-gthread.c
  75. coroutine-sigaltstack.c
  76. coroutine-ucontext.c
  77. coroutine-win32.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.hx
  90. hmp.c
  91. hmp.h
  92. iohandler.c
  93. ioport.c
  94. iothread.c
  95. kvm-all.c
  96. kvm-stub.c
  97. LICENSE
  98. main-loop.c
  99. MAINTAINERS
  100. Makefile
  101. Makefile.objs
  102. Makefile.target
  103. memory.c
  104. memory_mapping.c
  105. migration-exec.c
  106. migration-fd.c
  107. migration-rdma.c
  108. migration-tcp.c
  109. migration-unix.c
  110. migration.c
  111. module-common.c
  112. monitor.c
  113. nbd.c
  114. numa.c
  115. os-posix.c
  116. os-win32.c
  117. page_cache.c
  118. qapi-event.json
  119. qapi-schema.json
  120. qdev-monitor.c
  121. qdict-test-data.txt
  122. qemu-bridge-helper.c
  123. qemu-char.c
  124. qemu-coroutine-io.c
  125. qemu-coroutine-lock.c
  126. qemu-coroutine-sleep.c
  127. qemu-coroutine.c
  128. qemu-doc.texi
  129. qemu-file.c
  130. qemu-img-cmds.hx
  131. qemu-img.c
  132. qemu-img.texi
  133. qemu-io-cmds.c
  134. qemu-io.c
  135. qemu-log.c
  136. qemu-nbd.c
  137. qemu-nbd.texi
  138. qemu-options-wrapper.h
  139. qemu-options.h
  140. qemu-options.hx
  141. qemu-seccomp.c
  142. qemu-tech.texi
  143. qemu-timer.c
  144. qemu.nsi
  145. qemu.sasl
  146. qmp-commands.hx
  147. qmp.c
  148. qtest.c
  149. README
  150. rules.mak
  151. savevm.c
  152. softmmu_template.h
  153. spice-qemu-char.c
  154. tcg-runtime.c
  155. tci.c
  156. thread-pool.c
  157. thunk.c
  158. tpm.c
  159. trace-events
  160. translate-all.c
  161. translate-all.h
  162. user-exec.c
  163. VERSION
  164. version.rc
  165. vl.c
  166. vmstate.c
  167. xbzrle.c
  168. xen-common-stub.c
  169. xen-common.c
  170. xen-hvm-stub.c
  171. xen-hvm.c
  172. xen-mapcache.c