diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 3 | ||||
| -rw-r--r-- | fs/btrfs/dev-replace.c | 7 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.c | 19 | ||||
| -rw-r--r-- | fs/btrfs/sysfs.c | 148 | ||||
| -rw-r--r-- | fs/btrfs/sysfs.h | 8 | ||||
| -rw-r--r-- | fs/btrfs/volumes.c | 97 | ||||
| -rw-r--r-- | fs/btrfs/volumes.h | 9 | ||||
| -rw-r--r-- | lib/kobject.c | 1 |
8 files changed, 239 insertions, 53 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0498f5cd8752..80a9aefb0c46 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1619,10 +1619,7 @@ struct btrfs_fs_info { struct task_struct *cleaner_kthread; int thread_pool_size; - struct kobject super_kobj; struct kobject *space_info_kobj; - struct kobject *device_dir_kobj; - struct completion kobj_unregister; int do_barriers; int closing; int log_root_recovering; diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 0573848c7333..862fbc206755 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -376,6 +376,10 @@ int btrfs_dev_replace_start(struct btrfs_root *root, WARN_ON(!tgt_device); dev_replace->tgtdev = tgt_device; + ret = btrfs_kobj_add_device(tgt_device->fs_devices, tgt_device); + if (ret) + btrfs_error(root->fs_info, ret, "kobj add dev failed"); + printk_in_rcu(KERN_INFO "BTRFS: dev_replace from %s (devid %llu) to %s started\n", src_device->missing ? "<missing disk>" : @@ -583,8 +587,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, mutex_unlock(&uuid_mutex); /* replace the sysfs entry */ - btrfs_kobj_rm_device(fs_info, src_device); - btrfs_kobj_add_device(fs_info, tgt_device); + btrfs_kobj_rm_device(fs_info->fs_devices, src_device); btrfs_rm_dev_replace_free_srcdev(fs_info, src_device); /* write back the superblocks */ diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index b7fa3bac2cff..b977fc8d8201 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2497,7 +2497,6 @@ int open_ctree(struct super_block *sb, seqlock_init(&fs_info->profiles_lock); init_rwsem(&fs_info->delayed_iput_sem); - init_completion(&fs_info->kobj_unregister); INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); INIT_LIST_HEAD(&fs_info->space_info); INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); @@ -2877,10 +2876,22 @@ retry_root_backup: btrfs_close_extra_devices(fs_devices, 1); + ret = btrfs_sysfs_add_fsid(fs_devices, NULL); + if (ret) { + pr_err("BTRFS: failed to init sysfs fsid interface: %d\n", ret); + goto fail_block_groups; + } + + ret = btrfs_sysfs_add_device(fs_devices); + if (ret) { + pr_err("BTRFS: failed to init sysfs device interface: %d\n", ret); + goto fail_fsdev_sysfs; + } + ret = btrfs_sysfs_add_one(fs_info); if (ret) { pr_err("BTRFS: failed to init sysfs interface: %d\n", ret); - goto fail_block_groups; + goto fail_fsdev_sysfs; } ret = btrfs_init_space_info(fs_info); @@ -3058,6 +3069,9 @@ fail_cleaner: fail_sysfs: btrfs_sysfs_remove_one(fs_info); +fail_fsdev_sysfs: + btrfs_sysfs_remove_fsid(fs_info->fs_devices); + fail_block_groups: btrfs_put_block_group_cache(fs_info); btrfs_free_block_groups(fs_info); @@ -3735,6 +3749,7 @@ void close_ctree(struct btrfs_root *root) } btrfs_sysfs_remove_one(fs_info); + btrfs_sysfs_remove_fsid(fs_info->fs_devices); btrfs_free_fs_roots(fs_info); diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index e8a4c86d274d..603b0cc2b9bb 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -33,6 +33,7 @@ #include "volumes.h" static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj); +static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj); static u64 get_features(struct btrfs_fs_info *fs_info, enum btrfs_feature_set set) @@ -428,7 +429,7 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj, BTRFS_ATTR(clone_alignment, btrfs_clone_alignment_show); -static struct attribute *btrfs_attrs[] = { +static const struct attribute *btrfs_attrs[] = { BTRFS_ATTR_PTR(label), BTRFS_ATTR_PTR(nodesize), BTRFS_ATTR_PTR(sectorsize), @@ -438,21 +439,29 @@ static struct attribute *btrfs_attrs[] = { static void btrfs_release_super_kobj(struct kobject *kobj) { - struct btrfs_fs_info *fs_info = to_fs_info(kobj); - complete(&fs_info->kobj_unregister); + struct btrfs_fs_devices *fs_devs = to_fs_devs(kobj); + + memset(&fs_devs->super_kobj, 0, sizeof(struct kobject)); + complete(&fs_devs->kobj_unregister); } static struct kobj_type btrfs_ktype = { .sysfs_ops = &kobj_sysfs_ops, .release = btrfs_release_super_kobj, - .default_attrs = btrfs_attrs, }; +static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj) +{ + if (kobj->ktype != &btrfs_ktype) + return NULL; + return container_of(kobj, struct btrfs_fs_devices, super_kobj); +} + static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj) { if (kobj->ktype != &btrfs_ktype) return NULL; - return container_of(kobj, struct btrfs_fs_info, super_kobj); + return to_fs_devs(kobj)->fs_info; } #define NUM_FEATURE_BITS 64 @@ -493,12 +502,12 @@ static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add) attrs[0] = &fa->kobj_attr.attr; if (add) { int ret; - ret = sysfs_merge_group(&fs_info->super_kobj, + ret = sysfs_merge_group(&fs_info->fs_devices->super_kobj, &agroup); if (ret) return ret; } else - sysfs_unmerge_group(&fs_info->super_kobj, + sysfs_unmerge_group(&fs_info->fs_devices->super_kobj, &agroup); } @@ -506,25 +515,49 @@ static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add) return 0; } -static void __btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) +static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) +{ + if (fs_devs->device_dir_kobj) { + kobject_del(fs_devs->device_dir_kobj); + kobject_put(fs_devs->device_dir_kobj); + fs_devs->device_dir_kobj = NULL; + } + + if (fs_devs->super_kobj.state_initialized) { + kobject_del(&fs_devs->super_kobj); + kobject_put(&fs_devs->super_kobj); + wait_for_completion(&fs_devs->kobj_unregister); + } +} + +/* when fs_devs is NULL it will remove all fsid kobject */ +void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) { - kobject_del(&fs_info->super_kobj); - kobject_put(&fs_info->super_kobj); - wait_for_completion(&fs_info->kobj_unregister); + struct list_head *fs_uuids = btrfs_get_fs_uuids(); + + if (fs_devs) { + __btrfs_sysfs_remove_fsid(fs_devs); + return; + } + + list_for_each_entry(fs_devs, fs_uuids, list) { + __btrfs_sysfs_remove_fsid(fs_devs); + } } void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) { + btrfs_reset_fs_info_ptr(fs_info); + if (fs_info->space_info_kobj) { sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs); kobject_del(fs_info->space_info_kobj); kobject_put(fs_info->space_info_kobj); } - kobject_del(fs_info->device_dir_kobj); - kobject_put(fs_info->device_dir_kobj); addrm_unknown_feature_attrs(fs_info, false); - sysfs_remove_group(&fs_info->super_kobj, &btrfs_feature_attr_group); - __btrfs_sysfs_remove_one(fs_info); + sysfs_remove_group(&fs_info->fs_devices->super_kobj, &btrfs_feature_attr_group); + sysfs_remove_files(&fs_info->fs_devices->super_kobj, btrfs_attrs); + btrfs_kobj_rm_device(fs_info->fs_devices, NULL); } const char * const btrfs_feature_set_names[3] = { @@ -602,40 +635,60 @@ static void init_feature_attrs(void) } } -int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info, +/* when one_device is NULL, it removes all device links */ + +int btrfs_kobj_rm_device(struct btrfs_fs_devices *fs_devices, struct btrfs_device *one_device) { struct hd_struct *disk; struct kobject *disk_kobj; - if (!fs_info->device_dir_kobj) + if (!fs_devices->device_dir_kobj) return -EINVAL; if (one_device && one_device->bdev) { disk = one_device->bdev->bd_part; disk_kobj = &part_to_dev(disk)->kobj; - sysfs_remove_link(fs_info->device_dir_kobj, + sysfs_remove_link(fs_devices->device_dir_kobj, + disk_kobj->name); + } + + if (one_device) + return 0; + + list_for_each_entry(one_device, + &fs_devices->devices, dev_list) { + if (!one_device->bdev) + continue; + disk = one_device->bdev->bd_part; + disk_kobj = &part_to_dev(disk)->kobj; + + sysfs_remove_link(fs_devices->device_dir_kobj, disk_kobj->name); } return 0; } -int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info, - struct btrfs_device *one_device) +int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs) { - int error = 0; - struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; - struct btrfs_device *dev; - - if (!fs_info->device_dir_kobj) - fs_info->device_dir_kobj = kobject_create_and_add("devices", - &fs_info->super_kobj); + if (!fs_devs->device_dir_kobj) + fs_devs->device_dir_kobj = kobject_create_and_add("devices", + &fs_devs->super_kobj); - if (!fs_info->device_dir_kobj) + if (!fs_devs->device_dir_kobj) return -ENOMEM; + return 0; +} + +int btrfs_kobj_add_device(struct btrfs_fs_devices *fs_devices, + struct btrfs_device *one_device) +{ + int error = 0; + struct btrfs_device *dev; + list_for_each_entry(dev, &fs_devices->devices, dev_list) { struct hd_struct *disk; struct kobject *disk_kobj; @@ -649,7 +702,7 @@ int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info, disk = dev->bdev->bd_part; disk_kobj = &part_to_dev(disk)->kobj; - error = sysfs_create_link(fs_info->device_dir_kobj, + error = sysfs_create_link(fs_devices->device_dir_kobj, disk_kobj, disk_kobj->name); if (error) break; @@ -667,34 +720,51 @@ static struct dentry *btrfs_debugfs_root_dentry; /* Debugging tunables and exported data */ u64 btrfs_debugfs_test; +/* + * Can be called by the device discovery thread. + * And parent can be specified for seed device + */ +int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs, + struct kobject *parent) +{ + int error; + + init_completion(&fs_devs->kobj_unregister); + fs_devs->super_kobj.kset = btrfs_kset; + error = kobject_init_and_add(&fs_devs->super_kobj, + &btrfs_ktype, parent, "%pU", fs_devs->fsid); + return error; +} + int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) { int error; + struct btrfs_fs_devices *fs_devs = fs_info->fs_devices; + struct kobject *super_kobj = &fs_devs->super_kobj; + + btrfs_set_fs_info_ptr(fs_info); - init_completion(&fs_info->kobj_unregister); - fs_info->super_kobj.kset = btrfs_kset; - error = kobject_init_and_add(&fs_info->super_kobj, &btrfs_ktype, NULL, - "%pU", fs_info->fsid); + error = btrfs_kobj_add_device(fs_devs, NULL); if (error) return error; - error = sysfs_create_group(&fs_info->super_kobj, - &btrfs_feature_attr_group); + error = sysfs_create_files(super_kobj, btrfs_attrs); if (error) { - __btrfs_sysfs_remove_one(fs_info); + btrfs_kobj_rm_device(fs_devs, NULL); return error; } - error = addrm_unknown_feature_attrs(fs_info, true); + error = sysfs_create_group(super_kobj, + &btrfs_feature_attr_group); if (error) goto failure; - error = btrfs_kobj_add_device(fs_info, NULL); + error = addrm_unknown_feature_attrs(fs_info, true); if (error) goto failure; fs_info->space_info_kobj = kobject_create_and_add("allocation", - &fs_info->super_kobj); + super_kobj); if (!fs_info->space_info_kobj) { error = -ENOMEM; goto failure; diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h index 3a4bbed723fd..6392527bcc15 100644 --- a/fs/btrfs/sysfs.h +++ b/fs/btrfs/sysfs.h @@ -82,8 +82,12 @@ char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags); extern const char * const btrfs_feature_set_names[3]; extern struct kobj_type space_info_ktype; extern struct kobj_type btrfs_raid_ktype; -int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info, +int btrfs_kobj_add_device(struct btrfs_fs_devices *fs_devices, struct btrfs_device *one_device); -int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info, +int btrfs_kobj_rm_device(struct btrfs_fs_devices *fs_devices, struct btrfs_device *one_device); +int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs, + struct kobject *parent); +int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs); +void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs); #endif /* _BTRFS_SYSFS_H_ */ diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index c208d6a4dddb..83966996aacb 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -52,6 +52,10 @@ static void btrfs_dev_stat_print_on_load(struct btrfs_device *device); DEFINE_MUTEX(uuid_mutex); static LIST_HEAD(fs_uuids); +struct list_head *btrfs_get_fs_uuids(void) +{ + return &fs_uuids; +} static struct btrfs_fs_devices *__alloc_fs_devices(void) { @@ -441,6 +445,61 @@ static void pending_bios_fn(struct btrfs_work *work) run_scheduled_bios(device); } + +void btrfs_free_stale_device(struct btrfs_device *cur_dev) +{ + struct btrfs_fs_devices *fs_devs; + struct btrfs_device *dev; + + if (!cur_dev->name) + return; + + list_for_each_entry(fs_devs, &fs_uuids, list) { + int del = 1; + + if (fs_devs->opened) + continue; + if (fs_devs->seeding) + continue; + + list_for_each_entry(dev, &fs_devs->devices, dev_list) { + + if (dev == cur_dev) + continue; + if (!dev->name) + continue; + + /* + * Todo: This won't be enough. What if the same device + * comes back (with new uuid and) with its mapper path? + * But for now, this does help as mostly an admin will + * either use mapper or non mapper path throughout. + */ + rcu_read_lock(); + del = strcmp(rcu_str_deref(dev->name), + rcu_str_deref(cur_dev->name)); + rcu_read_unlock(); + if (!del) + break; + } + + if (!del) { + /* delete the stale device */ + if (fs_devs->num_devices == 1) { + btrfs_sysfs_remove_fsid(fs_devs); + list_del(&fs_devs->list); + free_fs_devices(fs_devs); + } else { + fs_devs->num_devices--; + list_del(&dev->dev_list); + rcu_string_free(dev->name); + kfree(dev); + } + break; + } + } +} + /* * Add new device to list of registered devices * @@ -556,6 +615,12 @@ static noinline int device_list_add(const char *path, if (!fs_devices->opened) device->generation = found_transid; + /* + * if there is new btrfs on an already registered device, + * then remove the stale device entry. + */ + btrfs_free_stale_device(device); + *fs_devices_ret = fs_devices; return ret; @@ -1722,7 +1787,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) if (device->bdev) { device->fs_devices->open_devices--; /* remove sysfs entry */ - btrfs_kobj_rm_device(root->fs_info, device); + btrfs_kobj_rm_device(root->fs_info->fs_devices, device); } call_rcu(&device->rcu, free_device); @@ -1891,6 +1956,9 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, mutex_lock(&uuid_mutex); WARN_ON(!tgtdev); mutex_lock(&fs_info->fs_devices->device_list_mutex); + + btrfs_kobj_rm_device(fs_info->fs_devices, tgtdev); + if (tgtdev->bdev) { btrfs_scratch_superblock(tgtdev); fs_info->fs_devices->open_devices--; @@ -2227,7 +2295,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) tmp + 1); /* add sysfs device entry */ - btrfs_kobj_add_device(root->fs_info, device); + btrfs_kobj_add_device(root->fs_info->fs_devices, device); /* * we've got more storage, clear any full flags on the space @@ -2268,8 +2336,9 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) */ snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU", root->fs_info->fsid); - if (kobject_rename(&root->fs_info->super_kobj, fsid_buf)) - goto error_trans; + if (kobject_rename(&root->fs_info->fs_devices->super_kobj, + fsid_buf)) + pr_warn("BTRFS: sysfs: failed to create fsid for sprout\n"); } root->fs_info->num_tolerated_disk_barrier_failures = @@ -2305,7 +2374,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) error_trans: btrfs_end_transaction(trans, root); rcu_string_free(device->name); - btrfs_kobj_rm_device(root->fs_info, device); + btrfs_kobj_rm_device(root->fs_info->fs_devices, device); kfree(device); error: blkdev_put(bdev, FMODE_EXCL); @@ -6781,3 +6850,21 @@ void btrfs_update_commit_device_bytes_used(struct btrfs_root *root, } unlock_chunks(root); } + +void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info) +{ + struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; + while (fs_devices) { + fs_devices->fs_info = fs_info; + fs_devices = fs_devices->seed; + } +} + +void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info) +{ + struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; + while (fs_devices) { + fs_devices->fs_info = NULL; + fs_devices = fs_devices->seed; + } +} diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index ebc31331a837..210a64390f40 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -253,6 +253,12 @@ struct btrfs_fs_devices { * nonrot flag set */ int rotating; + + struct btrfs_fs_info *fs_info; + /* sysfs kobjects */ + struct kobject super_kobj; + struct kobject *device_dir_kobj; + struct completion kobj_unregister; }; #define BTRFS_BIO_INLINE_CSUM_SIZE 64 @@ -537,5 +543,8 @@ static inline void unlock_chunks(struct btrfs_root *root) mutex_unlock(&root->fs_info->chunk_mutex); } +struct list_head *btrfs_get_fs_uuids(void); +void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); +void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); #endif diff --git a/lib/kobject.c b/lib/kobject.c index 3b841b97fccd..53bfc853cd8c 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -548,6 +548,7 @@ out: kfree(devpath); return error; } +EXPORT_SYMBOL_GPL(kobject_move); /** * kobject_del - unlink kobject from hierarchy. |