projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3e519038 TH |
1 | struct sysfs_elem_dir { |
| 2 | struct kobject * kobj; | |
| 3 | }; | |
| 4 | ||
| 5 | struct sysfs_elem_symlink { | |
| 2b29ac25 | 6 | struct sysfs_dirent * target_sd; |
| 3e519038 TH |
7 | }; |
| 8 | ||
| 9 | struct sysfs_elem_attr { | |
| 10 | struct attribute * attr; | |
| 11 | }; | |
| 12 | ||
| 13 | struct sysfs_elem_bin_attr { | |
| 14 | struct bin_attribute * bin_attr; | |
| 15 | }; | |
| 16 | ||
| 0ab66088 TH |
17 | /* |
| 18 | * As long as s_count reference is held, the sysfs_dirent itself is | |
| 19 | * accessible. Dereferencing s_elem or any other outer entity | |
| 20 | * requires s_active reference. | |
| 21 | */ | |
| d56c3eae AR |
22 | struct sysfs_dirent { |
| 23 | atomic_t s_count; | |
| 8619f979 | 24 | atomic_t s_active; |
| 13b3086d | 25 | struct sysfs_dirent * s_parent; |
| 0c73f18b TH |
26 | struct sysfs_dirent * s_sibling; |
| 27 | struct sysfs_dirent * s_children; | |
| 0c096b50 | 28 | const char * s_name; |
| 3e519038 TH |
29 | |
| 30 | union { | |
| 31 | struct sysfs_elem_dir dir; | |
| 32 | struct sysfs_elem_symlink symlink; | |
| 33 | struct sysfs_elem_attr attr; | |
| 34 | struct sysfs_elem_bin_attr bin_attr; | |
| 35 | } s_elem; | |
| 36 | ||
| b402d72c | 37 | unsigned int s_flags; |
| d56c3eae | 38 | umode_t s_mode; |
| dc351252 | 39 | ino_t s_ino; |
| d56c3eae AR |
40 | struct dentry * s_dentry; |
| 41 | struct iattr * s_iattr; | |
| 42 | atomic_t s_event; | |
| 43 | }; | |
| 1da177e4 | 44 | |
| 8619f979 | 45 | #define SD_DEACTIVATED_BIAS INT_MIN |
| 0ab66088 | 46 | |
| fb6896da TH |
47 | struct sysfs_addrm_cxt { |
| 48 | struct sysfs_dirent *parent_sd; | |
| 49 | struct inode *parent_inode; | |
| 50 | struct sysfs_dirent *removed; | |
| 51 | int cnt; | |
| 52 | }; | |
| 53 | ||
| 51225039 | 54 | extern struct sysfs_dirent sysfs_root; |
| e18b890b | 55 | extern struct kmem_cache *sysfs_dir_cachep; |
| 1da177e4 | 56 | |
| 53e0ae92 | 57 | extern struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd); |
| b6b4a439 TH |
58 | extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd); |
| 59 | extern void sysfs_put_active(struct sysfs_dirent *sd); | |
| 60 | extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd); | |
| 61 | extern void sysfs_put_active_two(struct sysfs_dirent *sd); | |
| fb6896da TH |
62 | extern void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt, |
| 63 | struct sysfs_dirent *parent_sd); | |
| 23dc2799 | 64 | extern int sysfs_add_one(struct sysfs_addrm_cxt *acxt, |
| fb6896da TH |
65 | struct sysfs_dirent *sd); |
| 66 | extern void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, | |
| 67 | struct sysfs_dirent *sd); | |
| 990e53f8 | 68 | extern void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt); |
| b6b4a439 | 69 | |
| 8312a8d7 | 70 | extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd); |
| 1da177e4 | 71 | |
| fa7f912a | 72 | extern void release_sysfs_dirent(struct sysfs_dirent * sd); |
| f0b0af47 TH |
73 | extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd, |
| 74 | const unsigned char *name); | |
| 75 | extern struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd, | |
| 76 | const unsigned char *name); | |
| 3e519038 TH |
77 | extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, |
| 78 | int type); | |
| 1da177e4 | 79 | |
| 608e266a TH |
80 | extern int sysfs_add_file(struct sysfs_dirent *dir_sd, |
| 81 | const struct attribute *attr, int type); | |
| 82 | extern int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name); | |
| 4508a7a7 | 83 | extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name); |
| 1da177e4 | 84 | |
| 608e266a TH |
85 | extern int sysfs_create_subdir(struct kobject *kobj, const char *name, |
| 86 | struct sysfs_dirent **p_sd); | |
| 87 | extern void sysfs_remove_subdir(struct sysfs_dirent *sd); | |
| 1da177e4 | 88 | |
| 988d186d | 89 | extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); |
| 1da177e4 | 90 | |
| 5f995323 | 91 | extern spinlock_t sysfs_assoc_lock; |
| 3007e997 | 92 | extern struct mutex sysfs_mutex; |
| 1da177e4 | 93 | extern struct super_block * sysfs_sb; |
| 4b6f5d20 AV |
94 | extern const struct file_operations sysfs_dir_operations; |
| 95 | extern const struct file_operations sysfs_file_operations; | |
| 96 | extern const struct file_operations bin_fops; | |
| c5ef1c42 AV |
97 | extern const struct inode_operations sysfs_dir_inode_operations; |
| 98 | extern const struct inode_operations sysfs_symlink_inode_operations; | |
| 1da177e4 | 99 | |
| b402d72c TH |
100 | static inline unsigned int sysfs_type(struct sysfs_dirent *sd) |
| 101 | { | |
| 102 | return sd->s_flags & SYSFS_TYPE_MASK; | |
| 103 | } | |
| 104 | ||
| 0ab66088 | 105 | static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) |
| 1da177e4 | 106 | { |
| 0ab66088 TH |
107 | if (sd) { |
| 108 | WARN_ON(!atomic_read(&sd->s_count)); | |
| 109 | atomic_inc(&sd->s_count); | |
| 110 | } | |
| 111 | return sd; | |
| 1da177e4 LT |
112 | } |
| 113 | ||
| 0ab66088 | 114 | static inline void sysfs_put(struct sysfs_dirent * sd) |
| 1da177e4 | 115 | { |
| 0ab66088 TH |
116 | if (sd && atomic_dec_and_test(&sd->s_count)) |
| 117 | release_sysfs_dirent(sd); | |
| 118 | } |