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also allow use of XZ for Qemu image compression

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* src/qemu_driver.c (enum qemud_save_formats) [QEMUD_SAVE_FORMAT_XZ]:
New member.
[QEMUD_SAVE_FORMAT_LZMA]: Mark as deprecated.
Use an explicit value for each member.
(qemudDomainSave, qemudDomainRestore): Handle the new member.
* src/qemu.conf: Mention xz, too.
This commit is contained in:
Jim Meyering 2009-09-08 20:52:37 +02:00
parent 5965de2f4d
commit 1aec7d8606
2 changed files with 17 additions and 6 deletions
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2
src/qemu.conf
View File

@ -134,7 +134,7 @@
# memory from the domain is dumped out directly to a file. If you have
# guests with a large amount of memory, however, this can take up quite
# a bit of space. If you would like to compress the images while they
# are being saved to disk, you can also set "gzip", "bzip2", "lzma"
# are being saved to disk, you can also set "gzip", "bzip2", "lzma", "xz",
# or "lzop" for save_image_format. Note that this means you slow down
# the process of saving a domain in order to save disk space.
#

21
src/qemu_driver.c
View File

@ -3619,11 +3619,15 @@ static char *qemudEscapeShellArg(const char *in)
#define QEMUD_SAVE_VERSION 2
enum qemud_save_formats {
QEMUD_SAVE_FORMAT_RAW,
QEMUD_SAVE_FORMAT_GZIP,
QEMUD_SAVE_FORMAT_BZIP2,
QEMUD_SAVE_FORMAT_LZMA,
QEMUD_SAVE_FORMAT_LZOP,
QEMUD_SAVE_FORMAT_RAW = 0,
QEMUD_SAVE_FORMAT_GZIP = 1,
QEMUD_SAVE_FORMAT_BZIP2 = 2,
QEMUD_SAVE_FORMAT_LZMA = 3, /* deprecated, in favor of xz */
QEMUD_SAVE_FORMAT_LZOP = 4,
QEMUD_SAVE_FORMAT_XZ = 5,
/* Note: add new members only at the end.
These values are used in the on-disk format.
Do not change or re-use numbers. */
};
struct qemud_save_header {
@ -3666,6 +3670,8 @@ static int qemudDomainSave(virDomainPtr dom,
header.compressed = QEMUD_SAVE_FORMAT_LZMA;
else if (STREQ(driver->saveImageFormat, "lzop"))
header.compressed = QEMUD_SAVE_FORMAT_LZOP;
else if (STREQ(driver->saveImageFormat, "xz"))
header.compressed = QEMUD_SAVE_FORMAT_XZ;
else {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("Invalid save image format specified in configuration file"));
@ -3761,6 +3767,9 @@ static int qemudDomainSave(virDomainPtr dom,
else if (header.compressed == QEMUD_SAVE_FORMAT_LZOP)
internalret = virAsprintf(&command, "migrate \"exec:"
"lzop -c >> '%s' 2>/dev/null\"", safe_path);
else if (header.compressed == QEMUD_SAVE_FORMAT_XZ)
internalret = virAsprintf(&command, "migrate \"exec:"
"xz -c >> '%s' 2>/dev/null\"", safe_path);
else {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR,
_("Invalid compress format %d"),
@ -4385,6 +4394,8 @@ static int qemudDomainRestore(virConnectPtr conn,
intermediate_argv[0] = "lzma";
else if (header.compressed == QEMUD_SAVE_FORMAT_LZOP)
intermediate_argv[0] = "lzop";
else if (header.compressed == QEMUD_SAVE_FORMAT_XZ)
intermediate_argv[0] = "xz";
else if (header.compressed != QEMUD_SAVE_FORMAT_RAW) {
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
_("Unknown compressed save format %d"),