From ae6621b0716852146e4655fef7f74a181faa6c81 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 28 Nov 2013 14:54:31 -0500 Subject: sysfs, kernfs: move internal decls to fs/kernfs/kernfs-internal.h Move data structure, constant and basic accessor declarations from fs/sysfs/sysfs.h to fs/kernfs/kernfs-internal.h. The two files currently include each other. Once kernfs / sysfs separation is complete, the cross inclusions will be removed. Inclusion protectors are added to fs/sysfs/sysfs.h to allow cross-inclusion. This patch doesn't introduce any functional changes. Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- fs/kernfs/kernfs-internal.h | 115 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 fs/kernfs/kernfs-internal.h (limited to 'fs/kernfs/kernfs-internal.h') diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h new file mode 100644 index 000000000000..5a2c3a17d7cb --- /dev/null +++ b/fs/kernfs/kernfs-internal.h @@ -0,0 +1,115 @@ +/* + * fs/kernfs/kernfs-internal.h - kernfs internal header file + * + * Copyright (c) 2001-3 Patrick Mochel + * Copyright (c) 2007 SUSE Linux Products GmbH + * Copyright (c) 2007, 2013 Tejun Heo + * + * This file is released under the GPLv2. + */ + +#ifndef __KERNFS_INTERNAL_H +#define __KERNFS_INTERNAL_H + +#include +#include +#include + +#include + +struct sysfs_open_dirent; + +/* type-specific structures for sysfs_dirent->s_* union members */ +struct sysfs_elem_dir { + unsigned long subdirs; + /* children rbtree starts here and goes through sd->s_rb */ + struct rb_root children; +}; + +struct sysfs_elem_symlink { + struct sysfs_dirent *target_sd; +}; + +struct sysfs_elem_attr { + const struct kernfs_ops *ops; + struct sysfs_open_dirent *open; + loff_t size; +}; + +struct sysfs_inode_attrs { + struct iattr ia_iattr; + void *ia_secdata; + u32 ia_secdata_len; +}; + +/* + * sysfs_dirent - the building block of sysfs hierarchy. Each and + * every sysfs node is represented by single sysfs_dirent. + * + * As long as s_count reference is held, the sysfs_dirent itself is + * accessible. Dereferencing s_elem or any other outer entity + * requires s_active reference. + */ +struct sysfs_dirent { + atomic_t s_count; + atomic_t s_active; +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lockdep_map dep_map; +#endif + struct sysfs_dirent *s_parent; + const char *s_name; + + struct rb_node s_rb; + + union { + struct completion *completion; + struct sysfs_dirent *removed_list; + } u; + + const void *s_ns; /* namespace tag */ + unsigned int s_hash; /* ns + name hash */ + union { + struct sysfs_elem_dir s_dir; + struct sysfs_elem_symlink s_symlink; + struct sysfs_elem_attr s_attr; + }; + + void *priv; + + unsigned short s_flags; + umode_t s_mode; + unsigned int s_ino; + struct sysfs_inode_attrs *s_iattr; +}; + +#define SD_DEACTIVATED_BIAS INT_MIN + +#define SYSFS_TYPE_MASK 0x000f +#define SYSFS_DIR 0x0001 +#define SYSFS_KOBJ_ATTR 0x0002 +#define SYSFS_KOBJ_LINK 0x0004 +#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK) +#define SYSFS_ACTIVE_REF SYSFS_KOBJ_ATTR + +#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK +#define SYSFS_FLAG_REMOVED 0x0010 +#define SYSFS_FLAG_NS 0x0020 +#define SYSFS_FLAG_HAS_SEQ_SHOW 0x0040 +#define SYSFS_FLAG_HAS_MMAP 0x0080 +#define SYSFS_FLAG_LOCKDEP 0x0100 + +static inline unsigned int sysfs_type(struct sysfs_dirent *sd) +{ + return sd->s_flags & SYSFS_TYPE_MASK; +} + +/* + * Context structure to be used while adding/removing nodes. + */ +struct sysfs_addrm_cxt { + struct sysfs_dirent *removed; +}; + +#include "../sysfs/sysfs.h" + +#endif /* __KERNFS_INTERNAL_H */ -- cgit v1.2.3