From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/fs/btrfs/sysfs.c | 158 ++++++++++++++++++++++++++++++++++-------------- 1 file changed, 114 insertions(+), 44 deletions(-) (limited to 'kernel/fs/btrfs/sysfs.c') diff --git a/kernel/fs/btrfs/sysfs.c b/kernel/fs/btrfs/sysfs.c index e8a4c86d2..e0ac85949 100644 --- a/kernel/fs/btrfs/sysfs.c +++ b/kernel/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), @@ -436,23 +437,31 @@ static struct attribute *btrfs_attrs[] = { NULL, }; -static void btrfs_release_super_kobj(struct kobject *kobj) +static void btrfs_release_fsid_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->fsid_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, + .release = btrfs_release_fsid_kobj, }; +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, fsid_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->fsid_kobj, &agroup); if (ret) return ret; } else - sysfs_unmerge_group(&fs_info->super_kobj, + sysfs_unmerge_group(&fs_info->fs_devices->fsid_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->fsid_kobj.state_initialized) { + kobject_del(&fs_devs->fsid_kobj); + kobject_put(&fs_devs->fsid_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) +void btrfs_sysfs_remove_mounted(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->fsid_kobj, &btrfs_feature_attr_group); + sysfs_remove_files(&fs_info->fs_devices->fsid_kobj, btrfs_attrs); + btrfs_sysfs_rm_device_link(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_sysfs_rm_device_link(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->fsid_kobj); - if (!fs_info->device_dir_kobj) + if (!fs_devs->device_dir_kobj) return -ENOMEM; + return 0; +} + +int btrfs_sysfs_add_device_link(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; -int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) +/* + * 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_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); + init_completion(&fs_devs->kobj_unregister); + fs_devs->fsid_kobj.kset = btrfs_kset; + error = kobject_init_and_add(&fs_devs->fsid_kobj, + &btrfs_ktype, parent, "%pU", fs_devs->fsid); + return error; +} + +int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info) +{ + int error; + struct btrfs_fs_devices *fs_devs = fs_info->fs_devices; + struct kobject *fsid_kobj = &fs_devs->fsid_kobj; + + btrfs_set_fs_info_ptr(fs_info); + + error = btrfs_sysfs_add_device_link(fs_devs, NULL); if (error) return error; - error = sysfs_create_group(&fs_info->super_kobj, - &btrfs_feature_attr_group); + error = sysfs_create_files(fsid_kobj, btrfs_attrs); if (error) { - __btrfs_sysfs_remove_one(fs_info); + btrfs_sysfs_rm_device_link(fs_devs, NULL); return error; } - error = addrm_unknown_feature_attrs(fs_info, true); + error = sysfs_create_group(fsid_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); + fsid_kobj); if (!fs_info->space_info_kobj) { error = -ENOMEM; goto failure; @@ -706,7 +776,7 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) return 0; failure: - btrfs_sysfs_remove_one(fs_info); + btrfs_sysfs_remove_mounted(fs_info); return error; } -- cgit 1.2.3-korg