# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1189114573 21600
# Node ID e7c143aafbc11cb0c4c2bac11be76e8abf39d953
# Parent de247793f7b5d8c931f88f28c29950b58a4dfe49
[IA64] Foreign p2m: rewrite save/restore with foreign p2m
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
tools/libxc/ia64/xc_ia64_linux_restore.c | 165 ++++++++++++++-------
tools/libxc/ia64/xc_ia64_linux_save.c | 242 +++++++++++++++++++++----------
tools/libxc/ia64/xc_ia64_save_restore.h | 44 +++++
3 files changed, 323 insertions(+), 128 deletions(-)
diff -r de247793f7b5 -r e7c143aafbc1 tools/libxc/ia64/xc_ia64_linux_restore.c
--- a/tools/libxc/ia64/xc_ia64_linux_restore.c Thu Sep 06 15:32:54 2007 -0600
+++ b/tools/libxc/ia64/xc_ia64_linux_restore.c Thu Sep 06 15:36:13 2007 -0600
@@ -5,12 +5,18 @@
*
* Copyright (c) 2003, K A Fraser.
* Rewritten for ia64 by Tristan Gingold <tristan.gingold@xxxxxxxx>
+ *
+ * Copyright (c) 2007 Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
+ * Use foreign p2m exposure.
*/
#include <stdlib.h>
#include <unistd.h>
#include "xg_private.h"
+#include "xc_ia64_save_restore.h"
+#include "xc_ia64.h"
+#include "xc_efi.h"
#define PFN_TO_KB(_pfn) ((_pfn) << (PAGE_SHIFT - 10))
@@ -40,6 +46,16 @@ read_exact(int fd, void *buf, size_t cou
}
static int
+populate_page_if_necessary(int xc_handle, uint32_t dom, unsigned long gmfn,
+ struct xen_ia64_p2m_table *p2m_table)
+{
+ if (xc_ia64_p2m_present(p2m_table, gmfn))
+ return 0;
+
+ return xc_domain_memory_populate_physmap(xc_handle, dom, 1, 0, 0, &gmfn);
+}
+
+static int
read_page(int xc_handle, int io_fd, uint32_t dom, unsigned long pfn)
{
void *mem;
@@ -66,7 +82,8 @@ xc_domain_restore(int xc_handle, int io_
unsigned int hvm, unsigned int pae)
{
DECLARE_DOMCTL;
- int rc = 1, i;
+ int rc = 1;
+ unsigned int i;
unsigned long gmfn;
unsigned long ver;
@@ -78,10 +95,11 @@ xc_domain_restore(int xc_handle, int io_
/* A copy of the CPU context of the guest. */
vcpu_guest_context_t ctxt;
- unsigned long *page_array = NULL;
-
/* A temporary mapping of the guest's start_info page. */
start_info_t *start_info;
+
+ struct xen_ia64_p2m_table p2m_table;
+ xc_ia64_p2m_init(&p2m_table);
if (hvm) {
ERROR("HVM Restore is unsupported");
@@ -102,7 +120,7 @@ xc_domain_restore(int xc_handle, int io_
ERROR("Error when reading version");
goto out;
}
- if (ver != 1) {
+ if (ver != XC_IA64_SR_FORMAT_VER_ONE && ver != XC_IA64_SR_FORMAT_VER_TWO) {
ERROR("version of save doesn't match");
goto out;
}
@@ -112,25 +130,6 @@ xc_domain_restore(int xc_handle, int io_
ERROR("Unable to lock_pages ctxt");
return 1;
}
-
- /* Get pages. */
- page_array = malloc(p2m_size * sizeof(unsigned long));
- if (page_array == NULL) {
- ERROR("Could not allocate memory");
- goto out;
- }
-
- for ( i = 0; i < p2m_size; i++ )
- page_array[i] = i;
-
- if ( xc_domain_memory_populate_physmap(xc_handle, dom, p2m_size,
- 0, 0, page_array) )
- {
- ERROR("Failed to allocate memory for %ld KB to dom %d.\n",
- PFN_TO_KB(p2m_size), dom);
- goto out;
- }
- DPRINTF("Allocated memory by %ld KB\n", PFN_TO_KB(p2m_size));
if (!read_exact(io_fd, &domctl.u.arch_setup, sizeof(domctl.u.arch_setup)))
{
ERROR("read: domain setup");
@@ -155,6 +154,61 @@ xc_domain_restore(int xc_handle, int io_
}
shared_info_frame = domctl.u.getdomaininfo.shared_info_frame;
+ if (ver == XC_IA64_SR_FORMAT_VER_TWO) {
+ unsigned int memmap_info_num_pages;
+ unsigned long memmap_size;
+ xen_ia64_memmap_info_t *memmap_info;
+
+ if (!read_exact(io_fd, &memmap_info_num_pages,
+ sizeof(memmap_info_num_pages))) {
+ ERROR("read: memmap_info_num_pages");
+ goto out;
+ }
+ memmap_size = memmap_info_num_pages * PAGE_SIZE;
+ memmap_info = malloc(memmap_size);
+ if (memmap_info == NULL) {
+ ERROR("Could not allocate memory for memmap_info");
+ goto out;
+ }
+ if (!read_exact(io_fd, memmap_info, memmap_size)) {
+ ERROR("read: memmap_info");
+ goto out;
+ }
+ if (xc_ia64_p2m_map(&p2m_table, xc_handle,
+ dom, memmap_info, IA64_DOM0VP_EFP_ALLOC_PTE)) {
+ ERROR("p2m mapping");
+ goto out;
+ }
+ free(memmap_info);
+ } else if (ver == XC_IA64_SR_FORMAT_VER_ONE) {
+ xen_ia64_memmap_info_t *memmap_info;
+ efi_memory_desc_t *memdesc;
+ uint64_t buffer[(sizeof(*memmap_info) + sizeof(*memdesc) +
+ sizeof(uint64_t) - 1) / sizeof(uint64_t)];
+
+ memset(buffer, 0, sizeof(buffer));
+ memmap_info = (xen_ia64_memmap_info_t *)buffer;
+ memdesc = (efi_memory_desc_t*)&memmap_info->memdesc[0];
+ memmap_info->efi_memmap_size = sizeof(*memmap_info) + sizeof(*memdesc);
+ memmap_info->efi_memdesc_size = sizeof(*memdesc);
+ memmap_info->efi_memdesc_version = EFI_MEMORY_DESCRIPTOR_VERSION;
+
+ memdesc->type = EFI_MEMORY_DESCRIPTOR_VERSION;
+ memdesc->phys_addr = 0;
+ memdesc->virt_addr = 0;
+ memdesc->num_pages = nr_pfns << (PAGE_SHIFT - EFI_PAGE_SHIFT);
+ memdesc->attribute = EFI_MEMORY_WB;
+
+ if (xc_ia64_p2m_map(&p2m_table, xc_handle,
+ dom, memmap_info, IA64_DOM0VP_EFP_ALLOC_PTE)) {
+ ERROR("p2m mapping");
+ goto out;
+ }
+ } else {
+ ERROR("unknown version");
+ goto out;
+ }
+
DPRINTF("Reloading memory pages: 0%%\n");
while (1) {
@@ -165,17 +219,26 @@ xc_domain_restore(int xc_handle, int io_
if (gmfn == INVALID_MFN)
break;
+ if (populate_page_if_necessary(xc_handle, dom, gmfn, &p2m_table) < 0) {
+ ERROR("can not populate page 0x%lx", gmfn);
+ goto out;
+ }
if (read_page(xc_handle, io_fd, dom, gmfn) < 0)
goto out;
}
DPRINTF("Received all pages\n");
- /* Get the list of PFNs that are not in the psuedo-phys map */
+ /*
+ * Get the list of PFNs that are not in the psuedo-phys map.
+ * Although we allocate pages on demand, balloon driver may
+ * decreased simaltenously. So we have to free the freed
+ * pages here.
+ */
{
unsigned int count;
unsigned long *pfntab;
- int rc;
+ unsigned int nr_frees;
if (!read_exact(io_fd, &count, sizeof(count))) {
ERROR("Error when reading pfn count");
@@ -190,35 +253,30 @@ xc_domain_restore(int xc_handle, int io_
if (!read_exact(io_fd, pfntab, sizeof(unsigned long)*count)) {
ERROR("Error when reading pfntab");
- goto out;
- }
-
- DPRINTF ("Try to free %u pages\n", count);
-
+ free(pfntab);
+ goto out;
+ }
+
+ nr_frees = 0;
for (i = 0; i < count; i++) {
-
- volatile unsigned long pfn;
-
- struct xen_memory_reservation reservation = {
- .nr_extents = 1,
- .extent_order = 0,
- .domid = dom
- };
- set_xen_guest_handle(reservation.extent_start,
- (unsigned long *)&pfn);
-
- pfn = pfntab[i];
- rc = xc_memory_op(xc_handle, XENMEM_decrease_reservation,
- &reservation);
- if (rc != 1) {
+ if (xc_ia64_p2m_allocated(&p2m_table, pfntab[i])) {
+ pfntab[nr_frees] = pfntab[i];
+ nr_frees++;
+ }
+ }
+ if (nr_frees > 0) {
+ if (xc_domain_memory_decrease_reservation(xc_handle, dom, nr_frees,
+ 0, pfntab) < 0) {
ERROR("Could not decrease reservation : %d", rc);
+ free(pfntab);
goto out;
}
- }
-
- DPRINTF("Decreased reservation by %d pages\n", count);
- }
-
+ else
+ DPRINTF("Decreased reservation by %d / %d pages\n",
+ nr_frees, count);
+ }
+ free(pfntab);
+ }
if (!read_exact(io_fd, &ctxt, sizeof(ctxt))) {
ERROR("Error when reading ctxt");
@@ -274,6 +332,10 @@ xc_domain_restore(int xc_handle, int io_
munmap (shared_info, PAGE_SIZE);
/* Uncanonicalise the suspend-record frame number and poke resume rec. */
+ if (populate_page_if_necessary(xc_handle, dom, gmfn, &p2m_table)) {
+ ERROR("cannot populate page 0x%lx", gmfn);
+ goto out;
+ }
start_info = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
PROT_READ | PROT_WRITE, gmfn);
if (start_info == NULL) {
@@ -309,8 +371,7 @@ xc_domain_restore(int xc_handle, int io_
if ((rc != 0) && (dom != 0))
xc_domain_destroy(xc_handle, dom);
- if (page_array != NULL)
- free(page_array);
+ xc_ia64_p2m_unmap(&p2m_table);
unlock_pages(&ctxt, sizeof(ctxt));
diff -r de247793f7b5 -r e7c143aafbc1 tools/libxc/ia64/xc_ia64_linux_save.c
--- a/tools/libxc/ia64/xc_ia64_linux_save.c Thu Sep 06 15:32:54 2007 -0600
+++ b/tools/libxc/ia64/xc_ia64_linux_save.c Thu Sep 06 15:36:13 2007 -0600
@@ -5,6 +5,9 @@
*
* Copyright (c) 2003, K A Fraser.
* Rewritten for ia64 by Tristan Gingold <tristan.gingold@xxxxxxxx>
+ *
+ * Copyright (c) 2007 Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
+ * Use foreign p2m exposure.
*/
#include <inttypes.h>
@@ -14,6 +17,9 @@
#include <sys/time.h>
#include "xg_private.h"
+#include "xc_ia64.h"
+#include "xc_ia64_save_restore.h"
+#include "xc_efi.h"
/*
** Default values for important tuning parameters. Can override by passing
@@ -151,8 +157,6 @@ xc_domain_save(int xc_handle, int io_fd,
/* A copy of the CPU context of the guest. */
vcpu_guest_context_t ctxt;
- unsigned long *page_array = NULL;
-
/* Live mapping of shared info structure */
shared_info_t *live_shinfo = NULL;
@@ -180,6 +184,17 @@ xc_domain_save(int xc_handle, int io_fd,
unsigned long *to_skip = NULL;
char *mem;
+
+ unsigned int memmap_info_num_pages;
+ unsigned long memmap_size = 0;
+ xen_ia64_memmap_info_t *memmap_info_live = NULL;
+ xen_ia64_memmap_info_t *memmap_info = NULL;
+ void *memmap_desc_start;
+ void *memmap_desc_end;
+ void *p;
+ efi_memory_desc_t *md;
+ struct xen_ia64_p2m_table p2m_table;
+ xc_ia64_p2m_init(&p2m_table);
if (debug)
fprintf(stderr, "xc_linux_save (ia64): started dom=%d\n", dom);
@@ -217,12 +232,6 @@ xc_domain_save(int xc_handle, int io_fd,
}
p2m_size = xc_memory_op(xc_handle, XENMEM_maximum_gpfn, &dom);
-
- page_array = malloc(p2m_size * sizeof(unsigned long));
- if (page_array == NULL) {
- ERROR("Could not allocate memory");
- goto out;
- }
/* This is expected by xm restore. */
if (!write_exact(io_fd, &p2m_size, sizeof(unsigned long))) {
@@ -236,7 +245,7 @@ xc_domain_save(int xc_handle, int io_fd,
The version is hard-coded, don't forget to change the restore code
too! */
{
- unsigned long version = 1;
+ unsigned long version = XC_IA64_SR_FORMAT_VER_CURRENT;
if (!write_exact(io_fd, &version, sizeof(unsigned long))) {
ERROR("write: version");
@@ -304,6 +313,38 @@ xc_domain_save(int xc_handle, int io_fd,
}
+ memmap_info_num_pages = live_shinfo->arch.memmap_info_num_pages;
+ memmap_size = PAGE_SIZE * memmap_info_num_pages;
+ memmap_info_live = xc_map_foreign_range(xc_handle, info.domid,
+ memmap_size, PROT_READ,
+ live_shinfo->arch.memmap_info_pfn);
+ if (memmap_info_live == NULL) {
+ PERROR("Could not map memmap info.");
+ goto out;
+ }
+ memmap_info = malloc(memmap_size);
+ if (memmap_info == NULL) {
+ PERROR("Could not allocate memmap info memory");
+ goto out;
+ }
+ memcpy(memmap_info, memmap_info_live, memmap_size);
+ munmap(memmap_info_live, memmap_size);
+ memmap_info_live = NULL;
+
+ if (xc_ia64_p2m_map(&p2m_table, xc_handle, dom, memmap_info, 0) < 0) {
+ PERROR("xc_ia64_p2m_map");
+ goto out;
+ }
+ if (!write_exact(io_fd,
+ &memmap_info_num_pages, sizeof(memmap_info_num_pages))) {
+ PERROR("write: arch.memmap_info_num_pages");
+ goto out;
+ }
+ if (!write_exact(io_fd, memmap_info, memmap_size)) {
+ PERROR("write: memmap_info");
+ goto out;
+ }
+
sent_last_iter = p2m_size;
total_sent = 0;
@@ -313,13 +354,6 @@ xc_domain_save(int xc_handle, int io_fd,
sent_this_iter = 0;
skip_this_iter = 0;
-
- /* Get the pfn list, as it may change. */
- if (xc_ia64_get_pfn_list(xc_handle, dom, page_array,
- 0, p2m_size) != p2m_size) {
- ERROR("Could not get the page frame list");
- goto out;
- }
/* Dirtied pages won't be saved.
slightly wasteful to peek the whole array evey time,
@@ -334,45 +368,64 @@ xc_domain_save(int xc_handle, int io_fd,
}
/* Start writing out the saved-domain record. */
- for (N = 0; N < p2m_size; N++) {
- if (page_array[N] == INVALID_MFN)
+ memmap_desc_start = &memmap_info->memdesc;
+ memmap_desc_end = memmap_desc_start + memmap_info->efi_memmap_size;
+ for (p = memmap_desc_start;
+ p < memmap_desc_end;
+ p += memmap_info->efi_memdesc_size) {
+ md = p;
+ if (md->type != EFI_CONVENTIONAL_MEMORY ||
+ md->attribute != EFI_MEMORY_WB ||
+ md->num_pages == 0)
continue;
- if (!last_iter) {
- if (test_bit(N, to_skip) && test_bit(N, to_send))
- skip_this_iter++;
- if (test_bit(N, to_skip) || !test_bit(N, to_send))
+
+ for (N = md->phys_addr >> PAGE_SHIFT;
+ N < (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >>
+ PAGE_SHIFT;
+ N++) {
+
+ if (!xc_ia64_p2m_allocated(&p2m_table, N))
continue;
- }
-
- if (debug)
- fprintf(stderr, "xc_linux_save: page %lx (%lu/%lu)\n",
- page_array[N], N, p2m_size);
-
- mem = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
- PROT_READ|PROT_WRITE, N);
- if (mem == NULL) {
- /* The page may have move.
- It will be remarked dirty.
- FIXME: to be tracked. */
- fprintf(stderr, "cannot map mfn page %lx gpfn %lx: %s\n",
- page_array[N], N, safe_strerror(errno));
- continue;
- }
-
- if (!write_exact(io_fd, &N, sizeof(N))) {
- ERROR("write: p2m_size");
+
+ if (!last_iter) {
+ if (test_bit(N, to_skip) && test_bit(N, to_send))
+ skip_this_iter++;
+ if (test_bit(N, to_skip) || !test_bit(N, to_send))
+ continue;
+ }
+
+ if (debug)
+ fprintf(stderr, "xc_linux_save: page %lx (%lu/%lu)\n",
+ xc_ia64_p2m_mfn(&p2m_table, N),
+ N, p2m_size);
+
+ mem = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
+ PROT_READ|PROT_WRITE, N);
+ if (mem == NULL) {
+ /* The page may have move.
+ It will be remarked dirty.
+ FIXME: to be tracked. */
+ fprintf(stderr, "cannot map mfn page %lx gpfn %lx: %s\n",
+ xc_ia64_p2m_mfn(&p2m_table, N),
+ N, safe_strerror(errno));
+ continue;
+ }
+
+ if (!write_exact(io_fd, &N, sizeof(N))) {
+ ERROR("write: p2m_size");
+ munmap(mem, PAGE_SIZE);
+ goto out;
+ }
+
+ if (write(io_fd, mem, PAGE_SIZE) != PAGE_SIZE) {
+ ERROR("Error when writing to state file (5)");
+ munmap(mem, PAGE_SIZE);
+ goto out;
+ }
munmap(mem, PAGE_SIZE);
- goto out;
- }
-
- if (write(io_fd, mem, PAGE_SIZE) != PAGE_SIZE) {
- ERROR("Error when writing to state file (5)");
- munmap(mem, PAGE_SIZE);
- goto out;
- }
- munmap(mem, PAGE_SIZE);
- sent_this_iter++;
- total_sent++;
+ sent_this_iter++;
+ total_sent++;
+ }
}
if (last_iter)
@@ -420,36 +473,69 @@ xc_domain_save(int xc_handle, int io_fd,
}
}
- /* Send through a list of all the PFNs that were not in map at the close */
+ /*
+ * Send through a list of all the PFNs that were not in map at the close.
+ * We send pages which was allocated. However balloon driver may
+ * decreased after sending page. So we have to check the freed
+ * page after pausing the domain.
+ */
{
- unsigned int i,j;
+ unsigned long N;
unsigned long pfntab[1024];
-
- for (i = 0, j = 0; i < p2m_size; i++) {
- if (page_array[i] == INVALID_MFN)
- j++;
- }
-
+ unsigned int j;
+
+ j = 0;
+ for (p = memmap_desc_start;
+ p < memmap_desc_end;
+ p += memmap_info->efi_memdesc_size) {
+ md = p;
+ if (md->type != EFI_CONVENTIONAL_MEMORY ||
+ md->attribute != EFI_MEMORY_WB ||
+ md->num_pages == 0)
+ continue;
+ for (N = md->phys_addr >> PAGE_SHIFT;
+ N < (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >>
+ PAGE_SHIFT;
+ N++) {
+ if (!xc_ia64_p2m_allocated(&p2m_table, N))
+ j++;
+ }
+ }
if (!write_exact(io_fd, &j, sizeof(unsigned int))) {
ERROR("Error when writing to state file (6a)");
goto out;
}
-
- for (i = 0, j = 0; i < p2m_size; ) {
-
- if (page_array[i] == INVALID_MFN)
- pfntab[j++] = i;
-
- i++;
- if (j == 1024 || i == p2m_size) {
- if (!write_exact(io_fd, &pfntab, sizeof(unsigned long)*j)) {
- ERROR("Error when writing to state file (6b)");
- goto out;
+
+ j = 0;
+ for (p = memmap_desc_start;
+ p < memmap_desc_end;
+ p += memmap_info->efi_memdesc_size) {
+ md = p;
+ if (md->type != EFI_CONVENTIONAL_MEMORY ||
+ md->attribute != EFI_MEMORY_WB ||
+ md->num_pages == 0)
+ continue;
+ for (N = md->phys_addr >> PAGE_SHIFT;
+ N < (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >>
+ PAGE_SHIFT;
+ N++) {
+ if (!xc_ia64_p2m_allocated(&p2m_table, N))
+ pfntab[j++] = N;
+ if (j == sizeof(pfntab)/sizeof(pfntab[0])) {
+ if (!write_exact(io_fd, &pfntab, sizeof(pfntab[0]) * j)) {
+ ERROR("Error when writing to state file (6b)");
+ goto out;
+ }
+ j = 0;
}
- j = 0;
- }
- }
-
+ }
+ }
+ if (j > 0) {
+ if (!write_exact(io_fd, &pfntab, sizeof(pfntab[0]) * j)) {
+ ERROR("Error when writing to state file (6b)");
+ goto out;
+ }
+ }
}
if (xc_vcpu_getcontext(xc_handle, dom, 0, &ctxt)) {
@@ -494,13 +580,17 @@ xc_domain_save(int xc_handle, int io_fd,
}
}
- free(page_array);
unlock_pages(to_send, bitmap_size);
free(to_send);
unlock_pages(to_skip, bitmap_size);
free(to_skip);
if (live_shinfo)
munmap(live_shinfo, PAGE_SIZE);
+ if (memmap_info_live)
+ munmap(memmap_info_live, memmap_size);
+ if (memmap_info)
+ free(memmap_info);
+ xc_ia64_p2m_unmap(&p2m_table);
fprintf(stderr,"Save exit rc=%d\n",rc);
diff -r de247793f7b5 -r e7c143aafbc1 tools/libxc/ia64/xc_ia64_save_restore.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/libxc/ia64/xc_ia64_save_restore.h Thu Sep 06 15:36:13 2007 -0600
@@ -0,0 +1,44 @@
+/******************************************************************************
+ * xc_ia64_save_restore.h
+ *
+ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
+ * VA Linux Systems Japan K.K.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef XC_IA64_SAVE_RESTORE_H
+#define XC_IA64_SR_H
+
+ /* introduced changeset 10692:306d7857928c of xen-ia64-unstable.ht */
+#define XC_IA64_SR_FORMAT_VER_ONE 1UL
+ /* using foreign p2m exposure version */
+#define XC_IA64_SR_FORMAT_VER_TWO 2UL
+#define XC_IA64_SR_FORMAT_VER_MAX 2UL
+
+#define XC_IA64_SR_FORMAT_VER_CURRENT XC_IA64_SR_FORMAT_VER_TWO
+
+#endif /* XC_IA64_SAVE_RESTORE_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
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