forked from pool/util-linux
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@ -1,112 +0,0 @@
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From db6041b3a569d78f5716baa5a134a3a857014337 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Wed, 30 May 2007 13:22:51 +0200
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Subject: [PATCH] mount: automatically reinitialize swap with old swsuspend data
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We have to reinitialize swap area with old (=useless) software suspend
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data. The problem is that if we don't do it, then we get data
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corruption the next time with suspended on.
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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mount/swapon.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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1 files changed, 63 insertions(+), 0 deletions(-)
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diff --git a/mount/swapon.c b/mount/swapon.c
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index ed91afc..3f9b442 100644
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--- a/mount/swapon.c
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+++ b/mount/swapon.c
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@@ -10,6 +10,9 @@
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#include <errno.h>
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#include <sys/stat.h>
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#include <unistd.h>
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+#include <sys/types.h>
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+#include <sys/wait.h>
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+#include <fcntl.h>
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#include "xmalloc.h"
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#include "swap_constants.h"
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#include "nls.h"
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@@ -17,6 +20,8 @@
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#include "realpath.h"
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#include "mount_paths.h"
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+#define PATH_MKSWAP "/sbin/mkswap"
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+
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#ifdef HAVE_SYS_SWAP_H
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# include <sys/swap.h>
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#endif
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@@ -158,6 +163,52 @@ display_summary(void)
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}
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static int
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+swap_is_swsuspend(const char *device) {
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+ const char *type = fsprobe_get_fstype_by_devname(device);
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+
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+ return (type && strcmp(type, "swsuspend") == 0) ? 1 : 0;
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+}
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+
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+/* calls mkswap */
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+static int
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+swap_reinitialize(const char *device) {
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+ const char *label = fsprobe_get_label_by_devname(device);
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+ pid_t pid;
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+ int status, ret;
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+
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+ switch((pid=fork())) {
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+ case -1: /* fork error */
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+ fprintf(stderr, _("%s: cannot fork: %s\n"),
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+ progname, strerror(errno));
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+ return -1;
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+
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+ case 0: /* child */
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+ if (label && *label)
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+ execl(PATH_MKSWAP, PATH_MKSWAP, "-L", label, device, NULL);
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+ else
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+ execl(PATH_MKSWAP, PATH_MKSWAP, device, NULL);
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+ exit(1); /* error */
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+
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+ default: /* parent */
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+ do {
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+ if ((ret = waitpid(pid, &status, 0)) < 0
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+ && errno == EINTR)
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+ continue;
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+ else if (ret < 0) {
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+ fprintf(stderr, _("%s: waitpid: %s\n"),
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+ progname, strerror(errno));
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+ return -1;
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+ }
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+ } while (0);
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+
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+ /* mkswap returns: 0=suss, 1=error */
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+ if (WIFEXITED(status) && WEXITSTATUS(status)==0)
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+ return 0; /* ok */
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+ }
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+ return -1; /* error */
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+}
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+
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+static int
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do_swapon(const char *orig_special, int prio, int canonic) {
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int status;
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struct stat st;
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@@ -179,6 +230,18 @@ do_swapon(const char *orig_special, int prio, int canonic) {
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return -1;
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}
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+ /* We have to reinitialize swap with old (=useless) software suspend
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+ * data. The problem is that if we don't do it, then we get data
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+ * corruption the next time with suspended on.
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+ */
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+ if (swap_is_swsuspend(special)) {
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+ fprintf(stdout, _("%s: %s: software suspend data detected. "
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+ "Reinitializing the swap.\n"),
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+ progname, special);
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+ if (swap_reinitialize(special) < 0)
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+ return -1;
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+ }
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+
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/* people generally dislike this warning - now it is printed
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only when `verbose' is set */
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if (verbose) {
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--
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1.5.2.2
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