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qemu / qemu / d6af99c9f8d577927a52d00af3fa8e6ec0b2a4e2
commitd6af99c9f8d577927a52d00af3fa8e6ec0b2a4e2[log] [tgz]
authorHaozhong Zhang <haozhong.zhang@intel.com>Thu Oct 27 12:22:58 2016 +0800
committerPaolo Bonzini <pbonzini@redhat.com>Tue Nov 01 16:06:57 2016 +0100
tree167b621b32133f1e0a263b8497bff56c9d24fe43
parentf35e44e7645edbb08e35b111c10c2fc57e2905c7 [diff]
exec.c: do not truncate non-empty memory backend file

For '-object memory-backend-file,mem-path=foo,size=xyz', if the size of
file 'foo' does not match the given size 'xyz', the current QEMU will
truncate the file to the given size, which may corrupt the existing data
in that file. To avoid such data corruption, this patch disables
truncating non-empty backend files.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Message-Id: <20161027042300.5929-2-haozhong.zhang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed
tree: 167b621b32133f1e0a263b8497bff56c9d24fe43
  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. io/
  16. libdecnumber/
  17. linux-headers/
  18. linux-user/
  19. migration/
  20. nbd/
  21. net/
  22. pc-bios/
  23. po/
  24. qapi/
  25. qga/
  26. qobject/
  27. qom/
  28. replay/
  29. roms/
  30. scripts/
  31. slirp/
  32. stubs/
  33. target-alpha/
  34. target-arm/
  35. target-cris/
  36. target-i386/
  37. target-lm32/
  38. target-m68k/
  39. target-microblaze/
  40. target-mips/
  41. target-moxie/
  42. target-openrisc/
  43. target-ppc/
  44. target-s390x/
  45. target-sh4/
  46. target-sparc/
  47. target-tilegx/
  48. target-tricore/
  49. target-unicore32/
  50. target-xtensa/
  51. tcg/
  52. tests/
  53. trace/
  54. ui/
  55. util/
  56. dtc
  57. pixman
  58. .dir-locals.el
  59. .exrc
  60. .gitignore
  61. .gitmodules
  62. .mailmap
  63. .travis.yml
  64. accel.c
  65. aio-posix.c
  66. aio-win32.c
  67. arch_init.c
  68. async.c
  69. atomic_template.h
  70. balloon.c
  71. block.c
  72. blockdev-nbd.c
  73. blockdev.c
  74. blockjob.c
  75. bootdevice.c
  76. bt-host.c
  77. bt-vhci.c
  78. Changelog
  79. CODING_STYLE
  80. configure
  81. COPYING
  82. COPYING.LIB
  83. cpu-exec-common.c
  84. cpu-exec.c
  85. cpus-common.c
  86. cpus.c
  87. cputlb.c
  88. device-hotplug.c
  89. device_tree.c
  90. disas.c
  91. dma-helpers.c
  92. dump.c
  93. exec.c
  94. gdbstub.c
  95. HACKING
  96. hmp-commands-info.hx
  97. hmp-commands.hx
  98. hmp.c
  99. hmp.h
  100. iohandler.c
  101. ioport.c
  102. iothread.c
  103. kvm-all.c
  104. kvm-stub.c
  105. LICENSE
  106. main-loop.c
  107. MAINTAINERS
  108. Makefile
  109. Makefile.objs
  110. Makefile.target
  111. memory.c
  112. memory_mapping.c
  113. module-common.c
  114. monitor.c
  115. numa.c
  116. os-posix.c
  117. os-win32.c
  118. page_cache.c
  119. qapi-schema.json
  120. qdev-monitor.c
  121. qdict-test-data.txt
  122. qemu-bridge-helper.c
  123. qemu-char.c
  124. qemu-doc.texi
  125. qemu-ga.texi
  126. qemu-img-cmds.hx
  127. qemu-img.c
  128. qemu-img.texi
  129. qemu-io-cmds.c
  130. qemu-io.c
  131. qemu-nbd.c
  132. qemu-nbd.texi
  133. qemu-option-trace.texi
  134. qemu-options-wrapper.h
  135. qemu-options.h
  136. qemu-options.hx
  137. qemu-seccomp.c
  138. qemu-tech.texi
  139. qemu-timer.c
  140. qemu.nsi
  141. qemu.sasl
  142. qmp.c
  143. qtest.c
  144. README
  145. replication.c
  146. replication.h
  147. rules.mak
  148. softmmu_template.h
  149. spice-qemu-char.c
  150. tcg-runtime.c
  151. tci.c
  152. thread-pool.c
  153. thunk.c
  154. tpm.c
  155. trace-events
  156. translate-all.c
  157. translate-all.h
  158. translate-common.c
  159. user-exec.c
  160. VERSION
  161. version.rc
  162. vl.c
  163. xen-common-stub.c
  164. xen-common.c
  165. xen-hvm-stub.c
  166. xen-hvm.c
  167. xen-mapcache.c