static ssize_t snapshot_write(struct file *filp, const char __user *buf, size_t count, loff_t *offp) { struct snapshot_data *data; ssize_t res; loff_t pg_offp = *offp & ~PAGE_MASK; lock_system_sleep(); data = filp->private_data; if (!pg_offp) { res = snapshot_write_next(&data->handle); if (res <= 0) goto unlock; } else { res = PAGE_SIZE - pg_offp; } res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp, buf, count); if (res > 0) *offp += res; unlock: unlock_system_sleep(); return res; }
static ssize_t snapshot_read(struct file *filp, char __user *buf, size_t count, loff_t *offp) { struct snapshot_data *data; ssize_t res; loff_t pg_offp = *offp & ~PAGE_MASK; lock_system_sleep(); data = filp->private_data; if (!data->ready) { res = -ENODATA; goto Unlock; } if (!pg_offp) { /* on page boundary? */ res = snapshot_read_next(&data->handle); if (res <= 0) goto Unlock; } else { res = PAGE_SIZE - pg_offp; } res = simple_read_from_buffer(buf, count, &pg_offp, data_of(data->handle), res); if (res > 0) *offp += res; Unlock: unlock_system_sleep(); return res; }
void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, u64 attr_valid, u64 attr_version) { struct fuse_conn *fc = get_fuse_conn(inode); struct fuse_inode *fi = get_fuse_inode(inode); loff_t oldsize; spin_lock(&fc->lock); if (attr_version != 0 && fi->attr_version > attr_version) { spin_unlock(&fc->lock); return; } fuse_change_attributes_common(inode, attr, attr_valid); oldsize = inode->i_size; i_size_write(inode, attr->size); spin_unlock(&fc->lock); if (S_ISREG(inode->i_mode) && oldsize != attr->size) { lock_system_sleep(); truncate_pagecache(inode, oldsize, attr->size); invalidate_inode_pages2(inode->i_mapping); unlock_system_sleep(); } }
static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { const char * const *s; int level; char *p; int len; int error = -EINVAL; p = memchr(buf, '\n', n); len = p ? p - buf : n; lock_system_sleep(); level = TEST_FIRST; for (s = &pm_tests[level]; level <= TEST_MAX; s++, level++) if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) { pm_test_level = level; error = 0; break; } unlock_system_sleep(); return error ? error : n; }
static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { dev_t res; int len = n; char *name; if (len && buf[len-1] == '\n') len--; name = kstrndup(buf, len, GFP_KERNEL); if (!name) return -ENOMEM; res = name_to_dev_t(name); kfree(name); if (!res) return -EINVAL; lock_system_sleep(); swsusp_resume_device = res; unlock_system_sleep(); pr_info("Starting manual resume from disk\n"); noresume = 0; software_resume(); return n; }
static int snapshot_open(struct inode *inode, struct file *filp) { struct snapshot_data *data; int error; lock_system_sleep(); if (!atomic_add_unless(&snapshot_device_available, -1, 0)) { error = -EBUSY; goto Unlock; } if ((filp->f_flags & O_ACCMODE) == O_RDWR) { atomic_inc(&snapshot_device_available); error = -ENOSYS; goto Unlock; } if(create_basic_memory_bitmaps()) { atomic_inc(&snapshot_device_available); error = -ENOMEM; goto Unlock; } nonseekable_open(inode, filp); data = &snapshot_state; filp->private_data = data; memset(&data->handle, 0, sizeof(struct snapshot_handle)); if ((filp->f_flags & O_ACCMODE) == O_RDONLY) { /* Hibernating. The image device should be accessible. */ data->swap = swsusp_resume_device ? swap_type_of(swsusp_resume_device, 0, NULL) : -1; data->mode = O_RDONLY; error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE); if (error) pm_notifier_call_chain(PM_POST_HIBERNATION); } else { /* * Resuming. We may need to wait for the image device to * appear. */ wait_for_device_probe(); data->swap = -1; data->mode = O_WRONLY; error = pm_notifier_call_chain(PM_RESTORE_PREPARE); if (error) pm_notifier_call_chain(PM_POST_RESTORE); } if (error) { free_basic_memory_bitmaps(); atomic_inc(&snapshot_device_available); } data->frozen = 0; data->ready = 0; data->platform_support = 0; Unlock: unlock_system_sleep(); return error; }
/** * suspend_set_ops - Set the global suspend method table. * @ops: Suspend operations to use. */ void suspend_set_ops(const struct platform_suspend_ops *ops) { suspend_state_t i; lock_system_sleep(); suspend_ops = ops; for (i = PM_SUSPEND_STANDBY; i <= PM_SUSPEND_MEM; i++) pm_states[i].state = valid_state(i) ? i : 0; unlock_system_sleep(); }
static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { int error = 0; int i; int len; char *p; int mode = HIBERNATION_INVALID; if (!hibernation_available()) return -EPERM; p = memchr(buf, '\n', n); len = p ? p - buf : n; lock_system_sleep(); for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) { if (len == strlen(hibernation_modes[i]) && !strncmp(buf, hibernation_modes[i], len)) { mode = i; break; } } if (mode != HIBERNATION_INVALID) { switch (mode) { case HIBERNATION_SHUTDOWN: case HIBERNATION_REBOOT: #ifdef CONFIG_SUSPEND case HIBERNATION_SUSPEND: #endif case HIBERNATION_TEST_RESUME: hibernation_mode = mode; break; case HIBERNATION_PLATFORM: if (hibernation_ops) hibernation_mode = mode; else error = -EINVAL; } } else error = -EINVAL; if (!error) pr_debug("Hibernation mode set to '%s'\n", hibernation_modes[mode]); unlock_system_sleep(); return error ? error : n; }
/** * hibernation_set_ops - Set the global hibernate operations. * @ops: Hibernation operations to use in subsequent hibernation transitions. */ void hibernation_set_ops(const struct platform_hibernation_ops *ops) { if (ops && !(ops->begin && ops->end && ops->pre_snapshot && ops->prepare && ops->finish && ops->enter && ops->pre_restore && ops->restore_cleanup && ops->leave)) { WARN_ON(1); return; } lock_system_sleep(); hibernation_ops = ops; if (ops) hibernation_mode = HIBERNATION_PLATFORM; else if (hibernation_mode == HIBERNATION_PLATFORM) hibernation_mode = HIBERNATION_SHUTDOWN; unlock_system_sleep(); }
/** * suspend_set_ops - Set the global suspend method table. * @ops: Suspend operations to use. */ void suspend_set_ops(const struct platform_suspend_ops *ops) { lock_system_sleep(); suspend_ops = ops; if (valid_state(PM_SUSPEND_STANDBY)) { mem_sleep_states[PM_SUSPEND_STANDBY] = mem_sleep_labels[PM_SUSPEND_STANDBY]; pm_states[PM_SUSPEND_STANDBY] = pm_labels[PM_SUSPEND_STANDBY]; if (mem_sleep_default == PM_SUSPEND_STANDBY) mem_sleep_current = PM_SUSPEND_STANDBY; } if (valid_state(PM_SUSPEND_MEM)) { mem_sleep_states[PM_SUSPEND_MEM] = mem_sleep_labels[PM_SUSPEND_MEM]; if (mem_sleep_default >= PM_SUSPEND_MEM) mem_sleep_current = PM_SUSPEND_MEM; } unlock_system_sleep(); }
/** * suspend_set_ops - Set the global suspend method table. * @ops: Suspend operations to use. */ void suspend_set_ops(const struct platform_suspend_ops *ops) { suspend_state_t i; int j = 0; lock_system_sleep(); suspend_ops = ops; for (i = PM_SUSPEND_MEM; i >= PM_SUSPEND_STANDBY; i--) if (valid_state(i)) { pm_states[i] = pm_labels[j++]; } else if (!relative_states) { pm_states[i] = NULL; j++; } pm_states[PM_SUSPEND_FREEZE] = pm_labels[j]; unlock_system_sleep(); }
/** * suspend_set_ops - Set the global suspend method table. * @ops: Suspend operations to use. */ void suspend_set_ops(const struct platform_suspend_ops *ops) { suspend_state_t i; int j = PM_SUSPEND_MAX - 1; lock_system_sleep(); suspend_ops = ops; for (i = PM_SUSPEND_MEM; i >= PM_SUSPEND_STANDBY; i--) if (valid_state(i)) pm_states[j--].state = i; else if (!relative_states) pm_states[j--].state = 0; pm_states[j--].state = PM_SUSPEND_FREEZE; while (j >= PM_SUSPEND_MIN) pm_states[j--].state = 0; unlock_system_sleep(); }
static int snapshot_release(struct inode *inode, struct file *filp) { struct snapshot_data *data; lock_system_sleep(); swsusp_free(); free_basic_memory_bitmaps(); data = filp->private_data; free_all_swap_pages(data->swap); if (data->frozen) { pm_restore_gfp_mask(); thaw_processes(); } pm_notifier_call_chain(data->mode == O_RDONLY ? PM_POST_HIBERNATION : PM_POST_RESTORE); atomic_inc(&snapshot_device_available); unlock_system_sleep(); return 0; }
static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { unsigned int maj, min; dev_t res; int ret = -EINVAL; if (sscanf(buf, "%u:%u", &maj, &min) != 2) goto out; res = MKDEV(maj,min); if (maj != MAJOR(res) || min != MINOR(res)) goto out; lock_system_sleep(); swsusp_resume_device = res; unlock_system_sleep(); printk(KERN_INFO "PM: Starting manual resume from disk\n"); noresume = 0; software_resume(); ret = n; out: return ret; }
void suspend_set_ops(const struct platform_suspend_ops *ops) { lock_system_sleep(); suspend_ops = ops; unlock_system_sleep(); }
/** * hibernate - Carry out system hibernation, including saving the image. */ int hibernate(void) { int error, nr_calls = 0; bool snapshot_test = false; if (!hibernation_available()) { pr_debug("Hibernation not available.\n"); return -EPERM; } lock_system_sleep(); /* The snapshot device should not be opened while we're running */ if (!atomic_add_unless(&snapshot_device_available, -1, 0)) { error = -EBUSY; goto Unlock; } pm_prepare_console(); error = __pm_notifier_call_chain(PM_HIBERNATION_PREPARE, -1, &nr_calls); if (error) { nr_calls--; goto Exit; } pr_info("Syncing filesystems ... \n"); sys_sync(); pr_info("done.\n"); error = freeze_processes(); if (error) goto Exit; lock_device_hotplug(); /* Allocate memory management structures */ error = create_basic_memory_bitmaps(); if (error) goto Thaw; error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM); if (error || freezer_test_done) goto Free_bitmaps; if (in_suspend) { unsigned int flags = 0; if (hibernation_mode == HIBERNATION_PLATFORM) flags |= SF_PLATFORM_MODE; if (nocompress) flags |= SF_NOCOMPRESS_MODE; else flags |= SF_CRC32_MODE; pr_debug("Writing image.\n"); error = swsusp_write(flags); swsusp_free(); if (!error) { if (hibernation_mode == HIBERNATION_TEST_RESUME) snapshot_test = true; else power_down(); } in_suspend = 0; pm_restore_gfp_mask(); } else { pr_debug("Image restored successfully.\n"); } Free_bitmaps: free_basic_memory_bitmaps(); Thaw: unlock_device_hotplug(); if (snapshot_test) { pr_debug("Checking hibernation image\n"); error = swsusp_check(); if (!error) error = load_image_and_restore(); } thaw_processes(); /* Don't bother checking whether freezer_test_done is true */ freezer_test_done = false; Exit: __pm_notifier_call_chain(PM_POST_HIBERNATION, nr_calls, NULL); pm_restore_console(); atomic_inc(&snapshot_device_available); Unlock: unlock_system_sleep(); return error; }
void freeze_set_ops(const struct platform_freeze_ops *ops) { lock_system_sleep(); freeze_ops = ops; unlock_system_sleep(); }
/** * hibernate - Carry out system hibernation, including saving the image. */ int hibernate(void) { int error; lock_system_sleep(); /* The snapshot device should not be opened while we're running */ if (!atomic_add_unless(&snapshot_device_available, -1, 0)) { error = -EBUSY; goto Unlock; } pm_prepare_console(); error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE); if (error) goto Exit; /* Allocate memory management structures */ error = create_basic_memory_bitmaps(); if (error) goto Exit; printk(KERN_INFO "PM: Syncing filesystems ... "); sys_sync(); printk("done.\n"); error = freeze_processes(); if (error) goto Free_bitmaps; error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM); if (error) goto Thaw; if (freezer_test_done) { freezer_test_done = false; goto Thaw; } if (in_suspend) { unsigned int flags = 0; if (hibernation_mode == HIBERNATION_PLATFORM) flags |= SF_PLATFORM_MODE; if (nocompress) flags |= SF_NOCOMPRESS_MODE; else flags |= SF_CRC32_MODE; pr_debug("PM: writing image.\n"); error = swsusp_write(flags); swsusp_free(); if (!error) power_down(); in_suspend = 0; pm_restore_gfp_mask(); } else { pr_debug("PM: Image restored successfully.\n"); } Thaw: thaw_processes(); Free_bitmaps: free_basic_memory_bitmaps(); Exit: pm_notifier_call_chain(PM_POST_HIBERNATION); pm_restore_console(); atomic_inc(&snapshot_device_available); Unlock: unlock_system_sleep(); return error; }
void s2idle_set_ops(const struct platform_s2idle_ops *ops) { lock_system_sleep(); s2idle_ops = ops; unlock_system_sleep(); }