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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Clean up save/restore state record handling. No need for Python to
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1175700896 -3600
# Node ID 0f8a327ebd4d86e0178d00b173b9c4e21591b625
# Parent 3f6ad86d37bd361069148c5a23a5006ce5d13ee0
Clean up save/restore state record handling. No need for Python to
read out the 'p2m size' field. Also that field is not needed at all
for HVM guests.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
tools/libxc/ia64/xc_ia64_linux_restore.c | 9 ++++++---
tools/libxc/xc_hvm_save.c | 7 -------
tools/libxc/xc_linux_restore.c | 8 +++++---
tools/libxc/xenguest.h | 3 ---
tools/python/xen/xend/XendCheckpoint.py | 16 ++++------------
tools/xcutils/xc_restore.c | 24 ++++++++++++------------
6 files changed, 27 insertions(+), 40 deletions(-)
diff -r 3f6ad86d37bd -r 0f8a327ebd4d tools/libxc/ia64/xc_ia64_linux_restore.c
--- a/tools/libxc/ia64/xc_ia64_linux_restore.c Wed Apr 04 16:18:28 2007 +0100
+++ b/tools/libxc/ia64/xc_ia64_linux_restore.c Wed Apr 04 16:34:56 2007 +0100
@@ -59,7 +59,7 @@ read_page(int xc_handle, int io_fd, uint
}
int
-xc_linux_restore(int xc_handle, int io_fd, uint32_t dom, unsigned long p2msize,
+xc_linux_restore(int xc_handle, int io_fd, uint32_t dom,
unsigned int store_evtchn, unsigned long *store_mfn,
unsigned int console_evtchn, unsigned long *console_mfn)
{
@@ -81,11 +81,14 @@ xc_linux_restore(int xc_handle, int io_f
/* A temporary mapping of the guest's start_info page. */
start_info_t *start_info;
- p2m_size = p2msize;
-
/* For info only */
nr_pfns = 0;
+ if ( !read_exact(io_fd, &p2m_size, sizeof(unsigned long)) )
+ {
+ ERROR("read: p2m_size");
+ goto out;
+ }
DPRINTF("xc_linux_restore start: p2m_size = %lx\n", p2m_size);
if (!read_exact(io_fd, &ver, sizeof(unsigned long))) {
diff -r 3f6ad86d37bd -r 0f8a327ebd4d tools/libxc/xc_hvm_save.c
--- a/tools/libxc/xc_hvm_save.c Wed Apr 04 16:18:28 2007 +0100
+++ b/tools/libxc/xc_hvm_save.c Wed Apr 04 16:34:56 2007 +0100
@@ -434,13 +434,6 @@ int xc_hvm_save(int xc_handle, int io_fd
goto out;
}
- /* Start writing out the saved-domain record. */
- if ( !write_exact(io_fd, &max_pfn, sizeof(unsigned long)) )
- {
- ERROR("write: max_pfn");
- goto out;
- }
-
for ( ; ; )
{
unsigned int prev_pc, sent_this_iter, N, batch;
diff -r 3f6ad86d37bd -r 0f8a327ebd4d tools/libxc/xc_linux_restore.c
--- a/tools/libxc/xc_linux_restore.c Wed Apr 04 16:18:28 2007 +0100
+++ b/tools/libxc/xc_linux_restore.c Wed Apr 04 16:34:56 2007 +0100
@@ -142,7 +142,6 @@ static int uncanonicalize_pagetable(int
int xc_linux_restore(int xc_handle, int io_fd, uint32_t dom,
- unsigned long p2msize,
unsigned int store_evtchn, unsigned long *store_mfn,
unsigned int console_evtchn, unsigned long *console_mfn)
{
@@ -194,11 +193,14 @@ int xc_linux_restore(int xc_handle, int
unsigned int max_vcpu_id = 0;
int new_ctxt_format = 0;
- p2m_size = p2msize;
-
/* For info only */
nr_pfns = 0;
+ if ( !read_exact(io_fd, &p2m_size, sizeof(unsigned long)) )
+ {
+ ERROR("read: p2m_size");
+ goto out;
+ }
DPRINTF("xc_linux_restore start: p2m_size = %lx\n", p2m_size);
/*
diff -r 3f6ad86d37bd -r 0f8a327ebd4d tools/libxc/xenguest.h
--- a/tools/libxc/xenguest.h Wed Apr 04 16:18:28 2007 +0100
+++ b/tools/libxc/xenguest.h Wed Apr 04 16:34:56 2007 +0100
@@ -43,14 +43,11 @@ int xc_hvm_save(int xc_handle, int io_fd
* @parm xc_handle a handle to an open hypervisor interface
* @parm fd the file descriptor to restore a domain from
* @parm dom the id of the domain
- * @parm p2m_size number of pages the guest has (i.e. number entries in P2M)
- * @parm max_nr_pfns domains maximum real memory allocation, in pages
* @parm store_evtchn the store event channel for this domain to use
* @parm store_mfn returned with the mfn of the store page
* @return 0 on success, -1 on failure
*/
int xc_linux_restore(int xc_handle, int io_fd, uint32_t dom,
- unsigned long p2m_size,
unsigned int store_evtchn, unsigned long *store_mfn,
unsigned int console_evtchn, unsigned long *console_mfn);
diff -r 3f6ad86d37bd -r 0f8a327ebd4d tools/python/xen/xend/XendCheckpoint.py
--- a/tools/python/xen/xend/XendCheckpoint.py Wed Apr 04 16:18:28 2007 +0100
+++ b/tools/python/xen/xend/XendCheckpoint.py Wed Apr 04 16:34:56 2007 +0100
@@ -201,19 +201,11 @@ def restore(xd, fd, dominfo = None, paus
pae = 0
try:
- l = read_exact(fd, sizeof_unsigned_long,
- "not a valid guest state file: pfn count read")
- p2m_size = unpack("L", l)[0] # native sizeof long
-
- if p2m_size > 16*1024*1024: # XXX
- raise XendError(
- "not a valid guest state file: pfn count out of range")
-
shadow = dominfo.info['shadow_memory']
- log.debug("restore:shadow=0x%x, _static_max=0x%x, _static_min=0x%x, "
- "p2m_size=0x%x.", dominfo.info['shadow_memory'],
+ log.debug("restore:shadow=0x%x, _static_max=0x%x, _static_min=0x%x, ",
+ dominfo.info['shadow_memory'],
dominfo.info['memory_static_max'],
- dominfo.info['memory_static_min'], p2m_size)
+ dominfo.info['memory_static_min'])
balloon.free(xc.pages_to_kib(nr_pfns) + shadow * 1024)
@@ -223,7 +215,7 @@ def restore(xd, fd, dominfo = None, paus
xc.domain_setmaxmem(dominfo.getDomid(), dominfo.getMemoryMaximum())
cmd = map(str, [xen.util.auxbin.pathTo(XC_RESTORE),
- fd, dominfo.getDomid(), p2m_size,
+ fd, dominfo.getDomid(),
store_port, console_port, int(is_hvm), pae, apic])
log.debug("[xc_restore]: %s", string.join(cmd))
diff -r 3f6ad86d37bd -r 0f8a327ebd4d tools/xcutils/xc_restore.c
--- a/tools/xcutils/xc_restore.c Wed Apr 04 16:18:28 2007 +0100
+++ b/tools/xcutils/xc_restore.c Wed Apr 04 16:34:56 2007 +0100
@@ -21,10 +21,10 @@ main(int argc, char **argv)
unsigned int xc_fd, io_fd, domid, store_evtchn, console_evtchn;
unsigned int hvm, pae, apic;
int ret;
- unsigned long p2m_size, store_mfn, console_mfn;
+ unsigned long store_mfn, console_mfn;
- if ( argc != 9 )
- errx(1, "usage: %s iofd domid p2m_size store_evtchn "
+ if ( argc != 8 )
+ errx(1, "usage: %s iofd domid store_evtchn "
"console_evtchn hvm pae apic", argv[0]);
xc_fd = xc_interface_open();
@@ -33,18 +33,18 @@ main(int argc, char **argv)
io_fd = atoi(argv[1]);
domid = atoi(argv[2]);
- p2m_size = atoi(argv[3]);
- store_evtchn = atoi(argv[4]);
- console_evtchn = atoi(argv[5]);
- hvm = atoi(argv[6]);
- pae = atoi(argv[7]);
- apic = atoi(argv[8]);
+ store_evtchn = atoi(argv[3]);
+ console_evtchn = atoi(argv[4]);
+ hvm = atoi(argv[5]);
+ pae = atoi(argv[6]);
+ apic = atoi(argv[7]);
if ( hvm )
- ret = xc_hvm_restore(xc_fd, io_fd, domid, store_evtchn,
- &store_mfn, pae, apic);
+ ret = xc_hvm_restore(xc_fd, io_fd, domid,
+ store_evtchn, &store_mfn,
+ pae, apic);
else
- ret = xc_linux_restore(xc_fd, io_fd, domid, p2m_size,
+ ret = xc_linux_restore(xc_fd, io_fd, domid,
store_evtchn, &store_mfn,
console_evtchn, &console_mfn);
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