block: add close notifiers

The first user of close notifiers will be the embedded NBD server.
It would be possible to use them to do some of the ad hoc processing
(e.g. for block jobs and I/O limits) that is currently done by
bdrv_close.

Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 files changed
tree: b41db25ccf86d7ab94d37bbbd620e0b21c941f78
  1. audio/
  2. block/
  3. bsd-user/
  4. default-configs/
  5. docs/
  6. fpu/
  7. fsdev/
  8. gdb-xml/
  9. hw/
  10. include/
  11. libcacard/
  12. linux-headers/
  13. linux-user/
  14. net/
  15. pc-bios/
  16. qapi/
  17. qga/
  18. QMP/
  19. qom/
  20. roms/
  21. scripts/
  22. slirp/
  23. sysconfigs/
  24. target-alpha/
  25. target-arm/
  26. target-cris/
  27. target-i386/
  28. target-lm32/
  29. target-m68k/
  30. target-microblaze/
  31. target-mips/
  32. target-openrisc/
  33. target-ppc/
  34. target-s390x/
  35. target-sh4/
  36. target-sparc/
  37. target-unicore32/
  38. target-xtensa/
  39. tcg/
  40. tests/
  41. trace/
  42. ui/
  43. .exrc
  44. .gitignore
  45. .gitmodules
  46. .mailmap
  47. a.out.h
  48. acl.c
  49. acl.h
  50. aes.c
  51. aes.h
  52. aio.c
  53. alpha-dis.c
  54. alpha.ld
  55. arch_init.c
  56. arch_init.h
  57. arm-dis.c
  58. arm.ld
  59. async.c
  60. balloon.c
  61. balloon.h
  62. bitmap.c
  63. bitmap.h
  64. bitops.c
  65. bitops.h
  66. block-migration.c
  67. block-migration.h
  68. block.c
  69. block.h
  70. block_int.h
  71. blockdev.c
  72. blockdev.h
  73. blockjob.c
  74. blockjob.h
  75. bswap.h
  76. bt-host.c
  77. bt-host.h
  78. bt-vhci.c
  79. buffered_file.c
  80. buffered_file.h
  81. cache-utils.c
  82. cache-utils.h
  83. Changelog
  84. cmd.c
  85. cmd.h
  86. CODING_STYLE
  87. compatfd.c
  88. compatfd.h
  89. compiler.h
  90. config.h
  91. configure
  92. console.c
  93. console.h
  94. COPYING
  95. COPYING.LIB
  96. coroutine-gthread.c
  97. coroutine-sigaltstack.c
  98. coroutine-ucontext.c
  99. coroutine-win32.c
  100. cpu-all.h
  101. cpu-common.h
  102. cpu-defs.h
  103. cpu-exec.c
  104. cpus.c
  105. cpus.h
  106. cputlb.c
  107. cputlb.h
  108. cris-dis.c
  109. cursor.c
  110. cursor_hidden.xpm
  111. cursor_left_ptr.xpm
  112. cutils.c
  113. def-helper.h
  114. device_tree.c
  115. device_tree.h
  116. dis-asm.h
  117. disas.c
  118. disas.h
  119. dma-helpers.c
  120. dma.h
  121. dump-stub.c
  122. dump.c
  123. dump.h
  124. elf.h
  125. envlist.c
  126. envlist.h
  127. error.c
  128. error.h
  129. event_notifier.c
  130. event_notifier.h
  131. exec-all.h
  132. exec-memory.h
  133. exec.c
  134. gdbstub.c
  135. gdbstub.h
  136. gen-icount.h
  137. HACKING
  138. hmp-commands.hx
  139. hmp.c
  140. hmp.h
  141. host-utils.c
  142. host-utils.h
  143. hppa-dis.c
  144. hppa.ld
  145. i386-dis.c
  146. i386.ld
  147. ia64-dis.c
  148. ia64.ld
  149. input.c
  150. int128.h
  151. iohandler.c
  152. ioport.c
  153. ioport.h
  154. iorange.h
  155. iov.c
  156. iov.h
  157. json-lexer.c
  158. json-lexer.h
  159. json-parser.c
  160. json-parser.h
  161. json-streamer.c
  162. json-streamer.h
  163. kvm-all.c
  164. kvm-stub.c
  165. kvm.h
  166. libfdt_env.h
  167. LICENSE
  168. linux-aio.c
  169. lm32-dis.c
  170. m68k-dis.c
  171. m68k.ld
  172. main-loop.c
  173. main-loop.h
  174. MAINTAINERS
  175. Makefile
  176. Makefile.dis
  177. Makefile.objs
  178. Makefile.target
  179. Makefile.user
  180. memory-internal.h
  181. memory.c
  182. memory.h
  183. memory_mapping-stub.c
  184. memory_mapping.c
  185. memory_mapping.h
  186. microblaze-dis.c
  187. migration-exec.c
  188. migration-fd.c
  189. migration-tcp.c
  190. migration-unix.c
  191. migration.c
  192. migration.h
  193. mips-dis.c
  194. mips.ld
  195. module.c
  196. module.h
  197. monitor.c
  198. monitor.h
  199. nbd.c
  200. nbd.h
  201. net.c
  202. net.h
  203. notify.c
  204. notify.h
  205. os-posix.c
  206. os-win32.c
  207. osdep.c
  208. osdep.h
  209. oslib-posix.c
  210. oslib-win32.c
  211. page_cache.c
  212. path.c
  213. pci-ids.txt
  214. pflib.c
  215. pflib.h
  216. poison.h
  217. posix-aio-compat.c
  218. ppc-dis.c
  219. ppc.ld
  220. ppc64.ld
  221. qapi-schema-guest.json
  222. qapi-schema-test.json
  223. qapi-schema.json
  224. qbool.c
  225. qbool.h
  226. qdict-test-data.txt
  227. qdict.c
  228. qdict.h
  229. qemu-aio.h
  230. qemu-barrier.h
  231. qemu-bridge-helper.c
  232. qemu-char.c
  233. qemu-char.h
  234. qemu-common.h
  235. qemu-config.c
  236. qemu-config.h
  237. qemu-coroutine-int.h
  238. qemu-coroutine-io.c
  239. qemu-coroutine-lock.c
  240. qemu-coroutine-sleep.c
  241. qemu-coroutine.c
  242. qemu-coroutine.h
  243. qemu-doc.texi
  244. qemu-error.c
  245. qemu-error.h
  246. qemu-file.h
  247. qemu-ga.c
  248. qemu-img-cmds.hx
  249. qemu-img.c
  250. qemu-img.texi
  251. qemu-io.c
  252. qemu-lock.h
  253. qemu-log.c
  254. qemu-log.h
  255. qemu-nbd.c
  256. qemu-nbd.texi
  257. qemu-objects.h
  258. qemu-option-internal.h
  259. qemu-option.c
  260. qemu-option.h
  261. qemu-options-wrapper.h
  262. qemu-options.h
  263. qemu-options.hx
  264. qemu-os-posix.h
  265. qemu-os-win32.h
  266. qemu-progress.c
  267. qemu-queue.h
  268. qemu-seccomp.c
  269. qemu-seccomp.h
  270. qemu-sockets.c
  271. qemu-tech.texi
  272. qemu-thread-posix.c
  273. qemu-thread-posix.h
  274. qemu-thread-win32.c
  275. qemu-thread-win32.h
  276. qemu-thread.h
  277. qemu-timer-common.c
  278. qemu-timer.c
  279. qemu-timer.h
  280. qemu-tls.h
  281. qemu-tool.c
  282. qemu-user.c
  283. qemu-x509.h
  284. qemu-xattr.h
  285. qemu.sasl
  286. qemu_socket.h
  287. qerror.c
  288. qerror.h
  289. qfloat.c
  290. qfloat.h
  291. qint.c
  292. qint.h
  293. qjson.c
  294. qjson.h
  295. qlist.c
  296. qlist.h
  297. qmp-commands.hx
  298. qmp.c
  299. qobject.h
  300. qstring.c
  301. qstring.h
  302. qtest.c
  303. qtest.h
  304. range.h
  305. readline.c
  306. readline.h
  307. README
  308. rules.mak
  309. s390-dis.c
  310. s390.ld
  311. savevm.c
  312. sh4-dis.c
  313. softmmu-semi.h
  314. softmmu_defs.h
  315. softmmu_exec.h
  316. softmmu_header.h
  317. softmmu_template.h
  318. sparc-dis.c
  319. sparc.ld
  320. sparc64.ld
  321. spice-qemu-char.c
  322. sysemu.h
  323. targphys.h
  324. tcg-runtime.c
  325. tci-dis.c
  326. tci.c
  327. thunk.c
  328. thunk.h
  329. TODO
  330. trace-events
  331. translate-all.c
  332. uboot_image.h
  333. uri.c
  334. uri.h
  335. user-exec.c
  336. VERSION
  337. version.rc
  338. vgafont.h
  339. vl.c
  340. vmstate.h
  341. x86_64.ld
  342. xen-all.c
  343. xen-mapcache.c
  344. xen-mapcache.h
  345. xen-stub.c