X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fsysfs%2Fsysfs.h;h=a96d9678ae7317f1bc7fdc6d0c64770b0924e880;hb=35df63c46c8605d00140ec4833d2104e2e9f1acc;hp=ae006b070bf0c924fd15981ab3d2d9cea825564f;hpb=8619f979898397582e366877fd5feeba7560d70c;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index ae006b0..a96d967 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -1,20 +1,48 @@ +/* + * fs/sysfs/sysfs.h - sysfs internal header file + * + * Copyright (c) 2001-3 Patrick Mochel + * Copyright (c) 2007 SUSE Linux Products GmbH + * Copyright (c) 2007 Tejun Heo + * + * This file is released under the GPLv2. + */ + +#include + +struct sysfs_open_dirent; + +/* type-specific structures for sysfs_dirent->s_* union members */ struct sysfs_elem_dir { - struct kobject * kobj; + struct kobject *kobj; + /* children list starts here and goes through sd->s_sibling */ + struct sysfs_dirent *children; }; struct sysfs_elem_symlink { - struct sysfs_dirent * target_sd; + struct sysfs_dirent *target_sd; }; struct sysfs_elem_attr { - struct attribute * attr; + struct attribute *attr; + struct sysfs_open_dirent *open; }; struct sysfs_elem_bin_attr { - struct bin_attribute * bin_attr; + struct bin_attribute *bin_attr; + struct hlist_head buffers; +}; + +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. @@ -22,71 +50,90 @@ struct sysfs_elem_bin_attr { struct sysfs_dirent { atomic_t s_count; atomic_t s_active; - struct sysfs_dirent * s_parent; - struct list_head s_sibling; - struct list_head s_children; - const char * s_name; + struct sysfs_dirent *s_parent; + struct sysfs_dirent *s_sibling; + const char *s_name; union { - struct sysfs_elem_dir dir; - struct sysfs_elem_symlink symlink; - struct sysfs_elem_attr attr; - struct sysfs_elem_bin_attr bin_attr; - } s_elem; + struct sysfs_elem_dir s_dir; + struct sysfs_elem_symlink s_symlink; + struct sysfs_elem_attr s_attr; + struct sysfs_elem_bin_attr s_bin_attr; + }; - int s_type; - umode_t s_mode; + unsigned int s_flags; ino_t s_ino; - struct dentry * s_dentry; - struct iattr * s_iattr; - atomic_t s_event; + umode_t s_mode; + struct sysfs_inode_attrs *s_iattr; }; -#define SD_DEACTIVATED_BIAS INT_MIN +#define SD_DEACTIVATED_BIAS INT_MIN + +#define SYSFS_TYPE_MASK 0x00ff +#define SYSFS_DIR 0x0001 +#define SYSFS_KOBJ_ATTR 0x0002 +#define SYSFS_KOBJ_BIN_ATTR 0x0004 +#define SYSFS_KOBJ_LINK 0x0008 +#define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK) + +#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK +#define SYSFS_FLAG_REMOVED 0x0200 -extern struct vfsmount * sysfs_mount; +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 *parent_sd; + struct inode *parent_inode; + struct sysfs_dirent *removed; + int cnt; +}; + +/* + * mount.c + */ +extern struct sysfs_dirent sysfs_root; +extern struct super_block *sysfs_sb; extern struct kmem_cache *sysfs_dir_cachep; -extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd); -extern void sysfs_put_active(struct sysfs_dirent *sd); -extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd); -extern void sysfs_put_active_two(struct sysfs_dirent *sd); -extern void sysfs_deactivate(struct sysfs_dirent *sd); - -extern void sysfs_delete_inode(struct inode *inode); -extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode); -extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd); -extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode); - -extern void release_sysfs_dirent(struct sysfs_dirent * sd); -extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *); -extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, - int type); -extern void sysfs_attach_dirent(struct sysfs_dirent *sd, - struct sysfs_dirent *parent_sd, - struct dentry *dentry); - -extern int sysfs_add_file(struct dentry *, const struct attribute *, int); -extern int sysfs_hash_and_remove(struct dentry * dir, const char * name); -extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name); - -extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); -extern void sysfs_remove_subdir(struct dentry *); - -extern void sysfs_drop_dentry(struct sysfs_dirent *sd); -extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); - -extern spinlock_t sysfs_lock; -extern spinlock_t kobj_sysfs_assoc_lock; -extern struct rw_semaphore sysfs_rename_sem; -extern struct super_block * sysfs_sb; +/* + * dir.c + */ +extern struct mutex sysfs_mutex; +extern struct mutex sysfs_rename_mutex; +extern spinlock_t sysfs_assoc_lock; + extern const struct file_operations sysfs_dir_operations; -extern const struct file_operations sysfs_file_operations; -extern const struct file_operations bin_fops; extern const struct inode_operations sysfs_dir_inode_operations; -extern const struct inode_operations sysfs_symlink_inode_operations; -static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) +struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd); +struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd); +void sysfs_put_active_two(struct sysfs_dirent *sd); +void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt, + struct sysfs_dirent *parent_sd); +int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd); +int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd); +void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd); +void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt); + +struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd, + const unsigned char *name); +struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd, + const unsigned char *name); +struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type); + +void release_sysfs_dirent(struct sysfs_dirent *sd); + +int sysfs_create_subdir(struct kobject *kobj, const char *name, + struct sysfs_dirent **p_sd); +void sysfs_remove_subdir(struct sysfs_dirent *sd); + +static inline struct sysfs_dirent *__sysfs_get(struct sysfs_dirent *sd) { if (sd) { WARN_ON(!atomic_read(&sd->s_count)); @@ -94,14 +141,44 @@ static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) } return sd; } +#define sysfs_get(sd) __sysfs_get(sd) -static inline void sysfs_put(struct sysfs_dirent * sd) +static inline void __sysfs_put(struct sysfs_dirent *sd) { if (sd && atomic_dec_and_test(&sd->s_count)) release_sysfs_dirent(sd); } +#define sysfs_put(sd) __sysfs_put(sd) -static inline int sysfs_is_shadowed_inode(struct inode *inode) -{ - return S_ISDIR(inode->i_mode) && inode->i_op->follow_link; -} +/* + * inode.c + */ +struct inode *sysfs_get_inode(struct sysfs_dirent *sd); +void sysfs_delete_inode(struct inode *inode); +int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr); +int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); +int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value, + size_t size, int flags); +int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name); +int sysfs_inode_init(void); + +/* + * file.c + */ +extern const struct file_operations sysfs_file_operations; + +int sysfs_add_file(struct sysfs_dirent *dir_sd, + const struct attribute *attr, int type); + +int sysfs_add_file_mode(struct sysfs_dirent *dir_sd, + const struct attribute *attr, int type, mode_t amode); +/* + * bin.c + */ +extern const struct file_operations bin_fops; +void unmap_bin_file(struct sysfs_dirent *attr_sd); + +/* + * symlink.c + */ +extern const struct inode_operations sysfs_symlink_inode_operations;