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OpenCloudOS-Kernel
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sysfs, kernfs: prepare open, release, poll paths for kernfs 

We're in the process of separating out core sysfs functionality into
kernfs which will deal with sysfs_dirents directly.  This patch
prepares the rest - open, release and poll.  There isn't much to do.
Just renaming is enough.  As sysfs_file_operations and
sysfs_bin_operations are identical now, use the same file_operations
for both - kernfs_file_operations.

This patch doesn't introduce any behavior changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tejun Heo 2013-11-28 14:54:19 -05:00 committed by Greg Kroah-Hartman
parent fdbffaa478
commit c6fb449515
3 changed files with 10 additions and 21 deletions
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24
fs/sysfs/file.c
View File

@ -668,7 +668,7 @@ static void sysfs_put_open_dirent(struct sysfs_dirent *sd,
kfree(od);
}
static int sysfs_open_file(struct inode *inode, struct file *file)
static int kernfs_file_open(struct inode *inode, struct file *file)
{
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->priv;
@ -771,7 +771,7 @@ err_out:
return error;
}
static int sysfs_release(struct inode *inode, struct file *filp)
static int kernfs_file_release(struct inode *inode, struct file *filp)
{
struct sysfs_dirent *sd = filp->f_path.dentry->d_fsdata;
struct sysfs_open_file *of = sysfs_of(filp);
@ -822,7 +822,7 @@ void sysfs_unmap_bin_file(struct sysfs_dirent *sd)
* to see if it supports poll (Neither 'poll' nor 'select' return
* an appropriate error code). When in doubt, set a suitable timeout value.
*/
static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
static unsigned int kernfs_file_poll(struct file *filp, poll_table *wait)
{
struct sysfs_open_file *of = sysfs_of(filp);
struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
@ -881,24 +881,14 @@ void sysfs_notify(struct kobject *k, const char *dir, const char *attr)
}
EXPORT_SYMBOL_GPL(sysfs_notify);
const struct file_operations sysfs_file_operations = {
const struct file_operations kernfs_file_operations = {
.read = kernfs_file_read,
.write = kernfs_file_write,
.llseek = generic_file_llseek,
.mmap = kernfs_file_mmap,
.open = sysfs_open_file,
.release = sysfs_release,
.poll = sysfs_poll,
};
const struct file_operations sysfs_bin_operations = {
.read = kernfs_file_read,
.write = kernfs_file_write,
.llseek = generic_file_llseek,
.mmap = kernfs_file_mmap,
.open = sysfs_open_file,
.release = sysfs_release,
.poll = sysfs_poll,
.open = kernfs_file_open,
.release = kernfs_file_release,
.poll = kernfs_file_poll,
};
int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,

4
fs/sysfs/inode.c
View File

@ -272,12 +272,12 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
break;
case SYSFS_KOBJ_ATTR:
inode->i_size = PAGE_SIZE;
inode->i_fop = &sysfs_file_operations;
inode->i_fop = &kernfs_file_operations;
break;
case SYSFS_KOBJ_BIN_ATTR:
bin_attr = sd->priv;
inode->i_size = bin_attr->size;
inode->i_fop = &sysfs_bin_operations;
inode->i_fop = &kernfs_file_operations;
break;
case SYSFS_KOBJ_LINK:
inode->i_op = &sysfs_symlink_inode_operations;

3
fs/sysfs/sysfs.h
View File

@ -212,8 +212,7 @@ int sysfs_inode_init(void);
/*
* file.c
*/
extern const struct file_operations sysfs_file_operations;
extern const struct file_operations sysfs_bin_operations;
extern const struct file_operations kernfs_file_operations;
int sysfs_add_file(struct sysfs_dirent *dir_sd,
const struct attribute *attr, int type);