qemu-img rebase: Fix for undersized backing files

Backing files may be smaller than the corresponding COW file. When
reading directly from the backing file, qemu-img rebase must consider
this and assume zero sectors after the end of backing files.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
1 file changed
tree: 6d745436e5ddb479ac315ccceac8803c4a7e35f9
  1. audio/
  2. block/
  3. bsd-user/
  4. darwin-user/
  5. default-configs/
  6. docs/
  7. fpu/
  8. fsdev/
  9. gdb-xml/
  10. hw/
  11. libcacard/
  12. linux-headers/
  13. linux-user/
  14. net/
  15. pc-bios/
  16. qapi/
  17. qga/
  18. QMP/
  19. roms/
  20. scripts/
  21. slirp/
  22. sysconfigs/
  23. target-alpha/
  24. target-arm/
  25. target-cris/
  26. target-i386/
  27. target-lm32/
  28. target-m68k/
  29. target-microblaze/
  30. target-mips/
  31. target-ppc/
  32. target-s390x/
  33. target-sh4/
  34. target-sparc/
  35. target-unicore32/
  36. target-xtensa/
  37. tcg/
  38. tests/
  39. trace/
  40. ui/
  41. .gitignore
  42. .gitmodules
  43. .mailmap
  44. a.out.h
  45. acl.c
  46. acl.h
  47. aes.c
  48. aes.h
  49. aio.c
  50. alpha-dis.c
  51. alpha.ld
  52. arch_init.c
  53. arch_init.h
  54. arm-dis.c
  55. arm-semi.c
  56. arm.ld
  57. async.c
  58. balloon.c
  59. balloon.h
  60. bitmap.c
  61. bitmap.h
  62. bitops.c
  63. bitops.h
  64. block-migration.c
  65. block-migration.h
  66. block.c
  67. block.h
  68. block_int.h
  69. blockdev.c
  70. blockdev.h
  71. bswap.h
  72. bt-host.c
  73. bt-host.h
  74. bt-vhci.c
  75. buffered_file.c
  76. buffered_file.h
  77. cache-utils.c
  78. cache-utils.h
  79. Changelog
  80. check-qdict.c
  81. check-qfloat.c
  82. check-qint.c
  83. check-qjson.c
  84. check-qlist.c
  85. check-qstring.c
  86. cmd.c
  87. cmd.h
  88. CODING_STYLE
  89. compatfd.c
  90. compatfd.h
  91. compiler.h
  92. config.h
  93. configure
  94. console.c
  95. console.h
  96. COPYING
  97. COPYING.LIB
  98. coroutine-gthread.c
  99. coroutine-ucontext.c
  100. coroutine-win32.c
  101. cpu-all.h
  102. cpu-common.h
  103. cpu-defs.h
  104. cpu-exec.c
  105. cpus.c
  106. cpus.h
  107. cris-dis.c
  108. cursor.c
  109. cursor_hidden.xpm
  110. cursor_left_ptr.xpm
  111. cutils.c
  112. def-helper.h
  113. device_tree.c
  114. device_tree.h
  115. dis-asm.h
  116. disas.c
  117. disas.h
  118. dma-helpers.c
  119. dma.h
  120. dyngen-exec.h
  121. elf.h
  122. envlist.c
  123. envlist.h
  124. error.c
  125. error.h
  126. error_int.h
  127. event_notifier.c
  128. event_notifier.h
  129. exec-all.h
  130. exec-memory.h
  131. exec.c
  132. gdbstub.c
  133. gdbstub.h
  134. gen-icount.h
  135. HACKING
  136. hmp-commands.hx
  137. hmp.c
  138. hmp.h
  139. host-utils.c
  140. host-utils.h
  141. hppa-dis.c
  142. hppa.ld
  143. i386-dis.c
  144. i386.ld
  145. ia64-dis.c
  146. ia64.ld
  147. input.c
  148. int128.h
  149. iohandler.c
  150. ioport-user.c
  151. ioport.c
  152. ioport.h
  153. iorange.h
  154. iov.c
  155. iov.h
  156. json-lexer.c
  157. json-lexer.h
  158. json-parser.c
  159. json-parser.h
  160. json-streamer.c
  161. json-streamer.h
  162. kvm-all.c
  163. kvm-stub.c
  164. kvm.h
  165. libfdt_env.h
  166. LICENSE
  167. linux-aio.c
  168. m68k-dis.c
  169. m68k-semi.c
  170. m68k.ld
  171. main-loop.c
  172. main-loop.h
  173. MAINTAINERS
  174. Makefile
  175. Makefile.dis
  176. Makefile.hw
  177. Makefile.objs
  178. Makefile.target
  179. Makefile.user
  180. memory.c
  181. memory.h
  182. microblaze-dis.c
  183. migration-exec.c
  184. migration-fd.c
  185. migration-tcp.c
  186. migration-unix.c
  187. migration.c
  188. migration.h
  189. mips-dis.c
  190. mips.ld
  191. module.c
  192. module.h
  193. monitor.c
  194. monitor.h
  195. nbd.c
  196. nbd.h
  197. net.c
  198. net.h
  199. notify.c
  200. notify.h
  201. os-posix.c
  202. os-win32.c
  203. osdep.c
  204. osdep.h
  205. oslib-posix.c
  206. oslib-win32.c
  207. path.c
  208. pci-ids.txt
  209. pflib.c
  210. pflib.h
  211. poison.h
  212. posix-aio-compat.c
  213. ppc-dis.c
  214. ppc.ld
  215. ppc64.ld
  216. qapi-schema-guest.json
  217. qapi-schema-test.json
  218. qapi-schema.json
  219. qbool.c
  220. qbool.h
  221. qdict-test-data.txt
  222. qdict.c
  223. qdict.h
  224. qemu-aio.h
  225. qemu-barrier.h
  226. qemu-char.c
  227. qemu-char.h
  228. qemu-common.h
  229. qemu-config.c
  230. qemu-config.h
  231. qemu-coroutine-int.h
  232. qemu-coroutine-lock.c
  233. qemu-coroutine.c
  234. qemu-coroutine.h
  235. qemu-doc.texi
  236. qemu-error.c
  237. qemu-error.h
  238. qemu-ga.c
  239. qemu-img-cmds.hx
  240. qemu-img.c
  241. qemu-img.texi
  242. qemu-io.c
  243. qemu-lock.h
  244. qemu-log.h
  245. qemu-nbd.c
  246. qemu-nbd.texi
  247. qemu-objects.h
  248. qemu-option.c
  249. qemu-option.h
  250. qemu-options.h
  251. qemu-options.hx
  252. qemu-os-posix.h
  253. qemu-os-win32.h
  254. qemu-progress.c
  255. qemu-queue.h
  256. qemu-sockets.c
  257. qemu-tech.texi
  258. qemu-thread-posix.c
  259. qemu-thread-posix.h
  260. qemu-thread-win32.c
  261. qemu-thread-win32.h
  262. qemu-thread.h
  263. qemu-timer-common.c
  264. qemu-timer.c
  265. qemu-timer.h
  266. qemu-tls.h
  267. qemu-tool.c
  268. qemu-x509.h
  269. qemu-xattr.h
  270. qemu.sasl
  271. qemu_socket.h
  272. qerror.c
  273. qerror.h
  274. qfloat.c
  275. qfloat.h
  276. qint.c
  277. qint.h
  278. qjson.c
  279. qjson.h
  280. qlist.c
  281. qlist.h
  282. qmp-commands.hx
  283. qmp.c
  284. qobject.h
  285. qstring.c
  286. qstring.h
  287. range.h
  288. readline.c
  289. readline.h
  290. README
  291. rules.mak
  292. s390-dis.c
  293. s390.ld
  294. savevm.c
  295. sh4-dis.c
  296. softmmu-semi.h
  297. softmmu_defs.h
  298. softmmu_exec.h
  299. softmmu_header.h
  300. softmmu_template.h
  301. sparc-dis.c
  302. sparc.ld
  303. sparc64.ld
  304. spice-qemu-char.c
  305. sysemu.h
  306. targphys.h
  307. tcg-runtime.c
  308. tci-dis.c
  309. tci.c
  310. test-coroutine.c
  311. test-qmp-commands.c
  312. test-qmp-input-visitor.c
  313. test-qmp-output-visitor.c
  314. thunk.c
  315. thunk.h
  316. TODO
  317. trace-events
  318. translate-all.c
  319. uboot_image.h
  320. usb-bsd.c
  321. usb-linux.c
  322. usb-redir.c
  323. usb-stub.c
  324. user-exec.c
  325. VERSION
  326. version.rc
  327. vgafont.h
  328. vl.c
  329. x86_64.ld
  330. xen-all.c
  331. xen-mapcache.c
  332. xen-mapcache.h
  333. xen-stub.c
  334. xtensa-semi.c