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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/sysfs/sysfs.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/sysfs/sysfs.h')
-rw-r--r-- | fs/sysfs/sysfs.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h new file mode 100644 index 0000000..a8a24a0 --- /dev/null +++ b/fs/sysfs/sysfs.h @@ -0,0 +1,95 @@ + +extern struct vfsmount * sysfs_mount; +extern kmem_cache_t *sysfs_dir_cachep; + +extern struct inode * sysfs_new_inode(mode_t mode); +extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *)); + +extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *, + umode_t, int); +extern struct dentry * sysfs_get_dentry(struct dentry *, const char *); + +extern int sysfs_add_file(struct dentry *, const struct attribute *, int); +extern void sysfs_hash_and_remove(struct dentry * dir, const char * name); + +extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); +extern void sysfs_remove_subdir(struct dentry *); + +extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd); +extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent); + +extern struct rw_semaphore sysfs_rename_sem; +extern struct super_block * sysfs_sb; +extern struct file_operations sysfs_dir_operations; +extern struct file_operations sysfs_file_operations; +extern struct file_operations bin_fops; +extern struct inode_operations sysfs_dir_inode_operations; +extern struct inode_operations sysfs_symlink_inode_operations; + +struct sysfs_symlink { + char * link_name; + struct kobject * target_kobj; +}; + +static inline struct kobject * to_kobj(struct dentry * dentry) +{ + struct sysfs_dirent * sd = dentry->d_fsdata; + return ((struct kobject *) sd->s_element); +} + +static inline struct attribute * to_attr(struct dentry * dentry) +{ + struct sysfs_dirent * sd = dentry->d_fsdata; + return ((struct attribute *) sd->s_element); +} + +static inline struct bin_attribute * to_bin_attr(struct dentry * dentry) +{ + struct sysfs_dirent * sd = dentry->d_fsdata; + return ((struct bin_attribute *) sd->s_element); +} + +static inline struct kobject *sysfs_get_kobject(struct dentry *dentry) +{ + struct kobject * kobj = NULL; + + spin_lock(&dcache_lock); + if (!d_unhashed(dentry)) { + struct sysfs_dirent * sd = dentry->d_fsdata; + if (sd->s_type & SYSFS_KOBJ_LINK) { + struct sysfs_symlink * sl = sd->s_element; + kobj = kobject_get(sl->target_kobj); + } else + kobj = kobject_get(sd->s_element); + } + spin_unlock(&dcache_lock); + + return kobj; +} + +static inline void release_sysfs_dirent(struct sysfs_dirent * sd) +{ + if (sd->s_type & SYSFS_KOBJ_LINK) { + struct sysfs_symlink * sl = sd->s_element; + kfree(sl->link_name); + kobject_put(sl->target_kobj); + kfree(sl); + } + kmem_cache_free(sysfs_dir_cachep, sd); +} + +static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) +{ + if (sd) { + WARN_ON(!atomic_read(&sd->s_count)); + atomic_inc(&sd->s_count); + } + return sd; +} + +static inline void sysfs_put(struct sysfs_dirent * sd) +{ + if (atomic_dec_and_test(&sd->s_count)) + release_sysfs_dirent(sd); +} + |