^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright 2021 Google LLC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/kobject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <uapi/linux/incrementalfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "sysfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "data_mgmt.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "vfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Define sys/fs/incrementalfs & sys/fs/incrementalfs/features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define INCFS_NODE_FEATURES "features"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define INCFS_NODE_INSTANCES "instances"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static struct kobject *sysfs_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static struct kobject *features_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static struct kobject *instances_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DECLARE_FEATURE_FLAG(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static ssize_t name##_show(struct kobject *kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct kobj_attribute *attr, char *buff) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return sysfs_emit(buff, "supported\n"); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct kobj_attribute name##_attr = __ATTR_RO(name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) DECLARE_FEATURE_FLAG(corefs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) DECLARE_FEATURE_FLAG(zstd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) DECLARE_FEATURE_FLAG(v2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static struct attribute *attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) &corefs_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) &zstd_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) &v2_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static const struct attribute_group attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .attrs = attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int __init incfs_init_sysfs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int res = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) sysfs_root = kobject_create_and_add(INCFS_NAME, fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (!sysfs_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) instances_node = kobject_create_and_add(INCFS_NODE_INSTANCES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) sysfs_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (!instances_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) goto err_put_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) features_node = kobject_create_and_add(INCFS_NODE_FEATURES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) sysfs_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!features_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) goto err_put_instances;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) res = sysfs_create_group(features_node, &attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) goto err_put_features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) err_put_features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) kobject_put(features_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) err_put_instances:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) kobject_put(instances_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) err_put_root:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) kobject_put(sysfs_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) void incfs_cleanup_sysfs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (features_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) sysfs_remove_group(features_node, &attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) kobject_put(features_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) kobject_put(instances_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) kobject_put(sysfs_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * Define sys/fs/incrementalfs/instances/<name>/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define __DECLARE_STATUS_FLAG(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static ssize_t name##_show(struct kobject *kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct kobj_attribute *attr, char *buff) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct incfs_sysfs_node *node = container_of(kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct incfs_sysfs_node, isn_sysfs_node); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return sysfs_emit(buff, "%d\n", node->isn_mi->mi_##name); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static struct kobj_attribute name##_attr = __ATTR_RO(name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define __DECLARE_STATUS_FLAG64(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static ssize_t name##_show(struct kobject *kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct kobj_attribute *attr, char *buff) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct incfs_sysfs_node *node = container_of(kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct incfs_sysfs_node, isn_sysfs_node); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return sysfs_emit(buff, "%lld\n", node->isn_mi->mi_##name); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static struct kobj_attribute name##_attr = __ATTR_RO(name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) __DECLARE_STATUS_FLAG(reads_failed_timed_out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) __DECLARE_STATUS_FLAG(reads_failed_hash_verification);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) __DECLARE_STATUS_FLAG(reads_failed_other);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) __DECLARE_STATUS_FLAG(reads_delayed_pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) __DECLARE_STATUS_FLAG64(reads_delayed_pending_us);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) __DECLARE_STATUS_FLAG(reads_delayed_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) __DECLARE_STATUS_FLAG64(reads_delayed_min_us);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static struct attribute *mount_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) &reads_failed_timed_out_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) &reads_failed_hash_verification_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) &reads_failed_other_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) &reads_delayed_pending_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) &reads_delayed_pending_us_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) &reads_delayed_min_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) &reads_delayed_min_us_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static void incfs_sysfs_release(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct incfs_sysfs_node *node = container_of(kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct incfs_sysfs_node, isn_sysfs_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) complete(&node->isn_completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static const struct attribute_group mount_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .attrs = mount_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static struct kobj_type incfs_kobj_node_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .release = &incfs_sysfs_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct incfs_sysfs_node *incfs_add_sysfs_node(const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct mount_info *mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct incfs_sysfs_node *node = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) node = kzalloc(sizeof(*node), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (!node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) node->isn_mi = mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) init_completion(&node->isn_completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) kobject_init(&node->isn_sysfs_node, &incfs_kobj_node_ktype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) error = kobject_add(&node->isn_sysfs_node, instances_node, "%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) error = sysfs_create_group(&node->isn_sysfs_node, &mount_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * Note kobject_put always calls release, so incfs_sysfs_release will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * free node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) kobject_put(&node->isn_sysfs_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return ERR_PTR(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) void incfs_free_sysfs_node(struct incfs_sysfs_node *node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (!node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) sysfs_remove_group(&node->isn_sysfs_node, &mount_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) kobject_put(&node->isn_sysfs_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) wait_for_completion_interruptible(&node->isn_completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) kfree(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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