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-rw-r--r--hibernate-freeze-filesystems.patch287
1 files changed, 0 insertions, 287 deletions
diff --git a/hibernate-freeze-filesystems.patch b/hibernate-freeze-filesystems.patch
deleted file mode 100644
index 841cab643..000000000
--- a/hibernate-freeze-filesystems.patch
+++ /dev/null
@@ -1,287 +0,0 @@
-commit b94887bbc0621e1e8402e7f0ec4bc3adf46c9a6e
-Author: Rafael J. Wysocki <rjw@sisk.pl>
-Date: Fri Feb 17 12:42:08 2012 -0500
-
- Freeze all filesystems during system suspend and (kernel-driven)
- hibernation by calling freeze_supers() for all superblocks and thaw
- them during the subsequent resume with the help of thaw_supers().
-
- This makes filesystems stay in a consistent state in case something
- goes wrong between system suspend (or hibernation) and the subsequent
- resume (e.g. journal replays won't be necessary in those cases). In
- particular, this should help to solve a long-standing issue that, in
- some cases, during resume from hibernation the boot loader causes the
- journal to be replied for the filesystem containing the kernel image
- and/or initrd causing it to become inconsistent with the information
- stored in the hibernation image.
-
- The user-space-driven hibernation (s2disk) is not covered by this
- change, because the freezing of filesystems prevents s2disk from
- accessing device special files it needs to do its job.
-
- This change is based on earlier work by Nigel Cunningham.
-
- Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
-
- Rebased to 3.3-rc3 by Josh Boyer <jwboyer@redhat.com>
-
-diff --git a/fs/super.c b/fs/super.c
-index 6015c02..c8057fa 100644
---- a/fs/super.c
-+++ b/fs/super.c
-@@ -594,6 +594,79 @@ void iterate_supers_type(struct file_system_type *type,
- EXPORT_SYMBOL(iterate_supers_type);
-
- /**
-+ * thaw_supers - call thaw_super() for all superblocks
-+ */
-+void thaw_supers(void)
-+{
-+ struct super_block *sb, *p = NULL;
-+
-+ spin_lock(&sb_lock);
-+ list_for_each_entry(sb, &super_blocks, s_list) {
-+ if (hlist_unhashed(&sb->s_instances))
-+ continue;
-+ sb->s_count++;
-+ spin_unlock(&sb_lock);
-+
-+ if (sb->s_flags & MS_FROZEN) {
-+ thaw_super(sb);
-+ sb->s_flags &= ~MS_FROZEN;
-+ }
-+
-+ spin_lock(&sb_lock);
-+ if (p)
-+ __put_super(p);
-+ p = sb;
-+ }
-+ if (p)
-+ __put_super(p);
-+ spin_unlock(&sb_lock);
-+}
-+
-+/**
-+ * freeze_supers - call freeze_super() for all superblocks
-+ */
-+int freeze_supers(void)
-+{
-+ struct super_block *sb, *p = NULL;
-+ int error = 0;
-+
-+ spin_lock(&sb_lock);
-+ /*
-+ * Freeze in reverse order so filesystems depending on others are
-+ * frozen in the right order (eg. loopback on ext3).
-+ */
-+ list_for_each_entry_reverse(sb, &super_blocks, s_list) {
-+ if (hlist_unhashed(&sb->s_instances))
-+ continue;
-+ sb->s_count++;
-+ spin_unlock(&sb_lock);
-+
-+ if (sb->s_root && sb->s_frozen != SB_FREEZE_TRANS
-+ && !(sb->s_flags & MS_RDONLY)) {
-+ error = freeze_super(sb);
-+ if (!error)
-+ sb->s_flags |= MS_FROZEN;
-+ }
-+
-+ spin_lock(&sb_lock);
-+ if (error)
-+ break;
-+ if (p)
-+ __put_super(p);
-+ p = sb;
-+ }
-+ if (p)
-+ __put_super(p);
-+ spin_unlock(&sb_lock);
-+
-+ if (error)
-+ thaw_supers();
-+
-+ return error;
-+}
-+
-+
-+/**
- * get_super - get the superblock of a device
- * @bdev: device to get the superblock for
- *
-diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 386da09..a164f4a 100644
---- a/include/linux/fs.h
-+++ b/include/linux/fs.h
-@@ -210,6 +210,7 @@ struct inodes_stat_t {
- #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
- #define MS_I_VERSION (1<<23) /* Update inode I_version field */
- #define MS_STRICTATIME (1<<24) /* Always perform atime updates */
-+#define MS_FROZEN (1<<25) /* Frozen filesystem */
- #define MS_NOSEC (1<<28)
- #define MS_BORN (1<<29)
- #define MS_ACTIVE (1<<30)
-@@ -2501,6 +2502,8 @@ extern void drop_super(struct super_block *sb);
- extern void iterate_supers(void (*)(struct super_block *, void *), void *);
- extern void iterate_supers_type(struct file_system_type *,
- void (*)(struct super_block *, void *), void *);
-+extern int freeze_supers(void);
-+extern void thaw_supers(void);
-
- extern int dcache_dir_open(struct inode *, struct file *);
- extern int dcache_dir_close(struct inode *, struct file *);
-diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
-index 6d6d288..492fc62 100644
---- a/kernel/power/hibernate.c
-+++ b/kernel/power/hibernate.c
-@@ -626,12 +626,17 @@ int hibernate(void)
- if (error)
- goto Finish;
-
-- error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM);
-+ error = freeze_supers();
- if (error)
- goto Thaw;
-+
-+ error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM);
-+ if (error)
-+ goto Thaw_fs;
-+
- if (freezer_test_done) {
- freezer_test_done = false;
-- goto Thaw;
-+ goto Thaw_fs;
- }
-
- if (in_suspend) {
-@@ -655,6 +660,8 @@ int hibernate(void)
- pr_debug("PM: Image restored successfully.\n");
- }
-
-+ Thaw_fs:
-+ thaw_supers();
- Thaw:
- thaw_processes();
- Finish:
-diff --git a/kernel/power/power.h b/kernel/power/power.h
-index 21724ee..40d6f64 100644
---- a/kernel/power/power.h
-+++ b/kernel/power/power.h
-@@ -1,3 +1,4 @@
-+#include <linux/fs.h>
- #include <linux/suspend.h>
- #include <linux/suspend_ioctls.h>
- #include <linux/utsname.h>
-@@ -227,45 +228,3 @@ enum {
- #define TEST_MAX (__TEST_AFTER_LAST - 1)
-
- extern int pm_test_level;
--
--#ifdef CONFIG_SUSPEND_FREEZER
--static inline int suspend_freeze_processes(void)
--{
-- int error;
--
-- error = freeze_processes();
--
-- /*
-- * freeze_processes() automatically thaws every task if freezing
-- * fails. So we need not do anything extra upon error.
-- */
-- if (error)
-- goto Finish;
--
-- error = freeze_kernel_threads();
--
-- /*
-- * freeze_kernel_threads() thaws only kernel threads upon freezing
-- * failure. So we have to thaw the userspace tasks ourselves.
-- */
-- if (error)
-- thaw_processes();
--
-- Finish:
-- return error;
--}
--
--static inline void suspend_thaw_processes(void)
--{
-- thaw_processes();
--}
--#else
--static inline int suspend_freeze_processes(void)
--{
-- return 0;
--}
--
--static inline void suspend_thaw_processes(void)
--{
--}
--#endif
-diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
-index 4fd51be..5f51fc7 100644
---- a/kernel/power/suspend.c
-+++ b/kernel/power/suspend.c
-@@ -29,6 +29,62 @@
-
- #include "power.h"
-
-+#ifdef CONFIG_SUSPEND_FREEZER
-+
-+static inline int suspend_freeze_processes(void)
-+{
-+ int error;
-+
-+ error = freeze_processes();
-+
-+ /*
-+ * freeze_processes() automatically thaws every task if freezing
-+ * fails. So we need not do anything extra upon error.
-+ */
-+
-+ if (error)
-+ goto Finish;
-+
-+ error = freeze_supers();
-+ if (error) {
-+ thaw_processes();
-+ goto Finish;
-+ }
-+
-+ error = freeze_kernel_threads();
-+
-+ /*
-+ * freeze_kernel_threads() thaws only kernel threads upon freezing
-+ * failure. So we have to thaw the userspace tasks ourselves.
-+ */
-+ if (error) {
-+ thaw_supers();
-+ thaw_processes();
-+ }
-+
-+Finish:
-+ return error;
-+}
-+
-+static inline void suspend_thaw_processes(void)
-+{
-+ thaw_supers();
-+ thaw_processes();
-+}
-+
-+#else /* !CONFIG_SUSPEND_FREEZER */
-+
-+static inline int suspend_freeze_processes(void)
-+{
-+ return 0;
-+}
-+
-+static inline void suspend_thaw_processes(void)
-+{
-+}
-+
-+#endif /* !CONFIG_SUSPEND_FREEZER */
-+
- const char *const pm_states[PM_SUSPEND_MAX] = {
- [PM_SUSPEND_STANDBY] = "standby",
- [PM_SUSPEND_MEM] = "mem",
generated by cgit (git 2.34.1) at 2024-05-27 07:23:46 +0000