size_t count;
loff_t pos;
char * page;
- struct sysfs_ops * ops;
+ const struct sysfs_ops * ops;
struct mutex mutex;
int needs_read_fill;
int event;
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops * ops = buffer->ops;
int ret = 0;
ssize_t count;
return -ENOMEM;
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
buffer->event = atomic_read(&attr_sd->s_attr.open->event);
count = ops->show(kobj, attr_sd->s_attr.attr, buffer->page);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
/*
* The code works fine with PAGE_SIZE return but it's likely to
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops * ops = buffer->ops;
int rc;
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
rc = ops->store(kobj, attr_sd->s_attr.attr, buffer->page, count);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return rc;
}
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
struct sysfs_buffer *buffer;
- struct sysfs_ops *ops;
+ const struct sysfs_ops *ops;
int error = -EACCES;
char *p;
memmove(last_sysfs_file, p, strlen(p) + 1);
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
/* every kobject with an attribute needs a ktype assigned */
goto err_free;
/* open succeeded, put active references */
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return 0;
err_free:
kfree(buffer);
err_out:
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return error;
}
struct sysfs_open_dirent *od = attr_sd->s_attr.open;
/* need parent for the kobj, grab both */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
goto trigger;
poll_wait(filp, &od->poll, wait);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
if (buffer->event != atomic_read(&od->event))
goto trigger;
if (!sd)
return -ENOMEM;
sd->s_attr.attr = (void *)attr;
+ sysfs_dirent_init_lockdep(sd);
sysfs_addrm_start(&acxt, dir_sd);
rc = sysfs_add_one(&acxt, sd);
}
+int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
+{
+ int err = 0;
+ int i;
+
+ for (i = 0; ptr[i] && !err; i++)
+ err = sysfs_create_file(kobj, ptr[i]);
+ if (err)
+ while (--i >= 0)
+ sysfs_remove_file(kobj, ptr[i]);
+ return err;
+}
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
*/
int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
{
- struct sysfs_dirent *victim_sd = NULL;
- struct dentry *victim = NULL;
- struct inode * inode;
+ struct sysfs_dirent *sd;
struct iattr newattrs;
int rc;
- rc = -ENOENT;
- victim_sd = sysfs_get_dirent(kobj->sd, attr->name);
- if (!victim_sd)
- goto out;
+ mutex_lock(&sysfs_mutex);
- mutex_lock(&sysfs_rename_mutex);
- victim = sysfs_get_dentry(victim_sd);
- mutex_unlock(&sysfs_rename_mutex);
- if (IS_ERR(victim)) {
- rc = PTR_ERR(victim);
- victim = NULL;
+ rc = -ENOENT;
+ sd = sysfs_find_dirent(kobj->sd, attr->name);
+ if (!sd)
goto out;
- }
-
- inode = victim->d_inode;
-
- mutex_lock(&inode->i_mutex);
-
- newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
- newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
- newattrs.ia_ctime = current_fs_time(inode->i_sb);
- rc = sysfs_setattr(victim, &newattrs);
- if (rc == 0) {
- fsnotify_change(victim, newattrs.ia_valid);
- mutex_lock(&sysfs_mutex);
- victim_sd->s_mode = newattrs.ia_mode;
- mutex_unlock(&sysfs_mutex);
- }
+ newattrs.ia_mode = (mode & S_IALLUGO) | (sd->s_mode & ~S_IALLUGO);
+ newattrs.ia_valid = ATTR_MODE;
+ rc = sysfs_sd_setattr(sd, &newattrs);
- mutex_unlock(&inode->i_mutex);
out:
- dput(victim);
- sysfs_put(victim_sd);
+ mutex_unlock(&sysfs_mutex);
return rc;
}
EXPORT_SYMBOL_GPL(sysfs_chmod_file);
sysfs_hash_and_remove(kobj->sd, attr->name);
}
+void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr)
+{
+ int i;
+ for (i = 0; ptr[i]; i++)
+ sysfs_remove_file(kobj, ptr[i]);
+}
/**
* sysfs_remove_file_from_group - remove an attribute file from a group.
EXPORT_SYMBOL_GPL(sysfs_create_file);
EXPORT_SYMBOL_GPL(sysfs_remove_file);
+EXPORT_SYMBOL_GPL(sysfs_remove_files);
+EXPORT_SYMBOL_GPL(sysfs_create_files);