diff options
Diffstat (limited to 'fs/kernfs')
-rw-r--r-- | fs/kernfs/dir.c | 4 | ||||
-rw-r--r-- | fs/kernfs/mount.c | 13 |
2 files changed, 16 insertions, 1 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 660995856a04..8b2bd65d70e7 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -383,9 +383,11 @@ static int kernfs_link_sibling(struct kernfs_node *kn) rb_insert_color(&kn->rb, &kn->parent->dir.children); /* successfully added, account subdir number */ + down_write(&kernfs_root(kn)->kernfs_iattr_rwsem); if (kernfs_type(kn) == KERNFS_DIR) kn->parent->dir.subdirs++; kernfs_inc_rev(kn->parent); + up_write(&kernfs_root(kn)->kernfs_iattr_rwsem); return 0; } @@ -408,9 +410,11 @@ static bool kernfs_unlink_sibling(struct kernfs_node *kn) if (RB_EMPTY_NODE(&kn->rb)) return false; + down_write(&kernfs_root(kn)->kernfs_iattr_rwsem); if (kernfs_type(kn) == KERNFS_DIR) kn->parent->dir.subdirs--; kernfs_inc_rev(kn->parent); + up_write(&kernfs_root(kn)->kernfs_iattr_rwsem); rb_erase(&kn->rb, &kn->parent->dir.children); RB_CLEAR_NODE(&kn->rb); diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index d49606accb07..c4bf26142eec 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -16,6 +16,8 @@ #include <linux/namei.h> #include <linux/seq_file.h> #include <linux/exportfs.h> +#include <linux/uuid.h> +#include <linux/statfs.h> #include "kernfs-internal.h" @@ -45,8 +47,15 @@ static int kernfs_sop_show_path(struct seq_file *sf, struct dentry *dentry) return 0; } +static int kernfs_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + simple_statfs(dentry, buf); + buf->f_fsid = uuid_to_fsid(dentry->d_sb->s_uuid.b); + return 0; +} + const struct super_operations kernfs_sops = { - .statfs = simple_statfs, + .statfs = kernfs_statfs, .drop_inode = generic_delete_inode, .evict_inode = kernfs_evict_inode, @@ -351,6 +360,8 @@ int kernfs_get_tree(struct fs_context *fc) } sb->s_flags |= SB_ACTIVE; + uuid_gen(&sb->s_uuid); + down_write(&root->kernfs_supers_rwsem); list_add(&info->node, &info->root->supers); up_write(&root->kernfs_supers_rwsem); |