[PATCH 17/41] sysfs, kernfs: remove SYSFS_KOBJ_BIN_ATTR

Tejun Heo
2013-11-23T22:30:43Z

After kernfs_ops and sysfs_dirent->s_attr.size addition, the
distinction between SYSFS_KOBJ_BIN_ATTR and SYSFS_KOBJ_ATTR is only
necessary while creating files to decide which kernfs_ops to use.
Afterwards, they behave exactly the same.

This patch removes SYSFS_KOBJ_BIN_ATTR along with sysfs_is_bin().
sysfs_add_file[_mode_ns]() are updated to take bool @is_bin instead of
@type.

This patch doesn't introduce any behavior changes. This completely
isolates the distinction between the two sysfs file types in the sysfs
layer proper.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
fs/sysfs/file.c | 23 ++++++++---------------
fs/sysfs/group.c | 5 ++---
fs/sysfs/inode.c | 1 -
fs/sysfs/sysfs.h | 11 ++++-------
4 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 0b0cec8..e2ce674 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -47,11 +47,6 @@ struct sysfs_open_dirent {
struct list_head files; /* goes through sysfs_open_file.list */
};

-static bool sysfs_is_bin(struct sysfs_dirent *sd)
-{
- return sysfs_type(sd) == SYSFS_KOBJ_BIN_ATTR;
-}
-
static struct sysfs_open_file *sysfs_of(struct file *file)
{
return ((struct seq_file *)file->private_data)->private;
@@ -916,7 +911,7 @@ static const struct kernfs_ops sysfs_bin_kfops_rw = {
};

int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
- const struct attribute *attr, int type,
+ const struct attribute *attr, bool is_bin,
umode_t amode, const void *ns)
{
umode_t mode = (amode & S_IALLUGO) | S_IFREG;
@@ -926,7 +921,7 @@ int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
loff_t size;
int rc;

- if (type == SYSFS_KOBJ_ATTR) {
+ if (!is_bin) {
struct kobject *kobj = dir_sd->priv;
const struct sysfs_ops *sysfs_ops = kobj->ktype->sysfs_ops;

@@ -961,7 +956,7 @@ int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
size = battr->size;
}

- sd = sysfs_new_dirent(attr->name, mode, type);
+ sd = sysfs_new_dirent(attr->name, mode, SYSFS_KOBJ_ATTR);
if (!sd)
return -ENOMEM;

@@ -991,11 +986,10 @@ int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
return rc;
}

-
int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
- int type)
+ bool is_bin)
{
- return sysfs_add_file_mode_ns(dir_sd, attr, type, attr->mode, NULL);
+ return sysfs_add_file_mode_ns(dir_sd, attr, is_bin, attr->mode, NULL);
}

/**
@@ -1009,8 +1003,7 @@ int sysfs_create_file_ns(struct kobject *kobj, const struct attribute *attr,
{
BUG_ON(!kobj || !kobj->sd || !attr);

- return sysfs_add_file_mode_ns(kobj->sd, attr, SYSFS_KOBJ_ATTR,
- attr->mode, ns);
+ return sysfs_add_file_mode_ns(kobj->sd, attr, false, attr->mode, ns);

}
EXPORT_SYMBOL_GPL(sysfs_create_file_ns);
@@ -1049,7 +1042,7 @@ int sysfs_add_file_to_group(struct kobject *kobj,
if (!dir_sd)
return -ENOENT;

- error = sysfs_add_file(dir_sd, attr, SYSFS_KOBJ_ATTR);
+ error = sysfs_add_file(dir_sd, attr, false);
sysfs_put(dir_sd);

return error;
@@ -1141,7 +1134,7 @@ int sysfs_create_bin_file(struct kobject *kobj,
{
BUG_ON(!kobj || !kobj->sd || !attr);

- return sysfs_add_file(kobj->sd, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
+ return sysfs_add_file(kobj->sd, &attr->attr, true);
}
EXPORT_SYMBOL_GPL(sysfs_create_bin_file);

diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 11be6de..d7f4f6e 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -55,8 +55,7 @@ static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
if (!mode)
continue;
}
- error = sysfs_add_file_mode_ns(dir_sd, *attr,
- SYSFS_KOBJ_ATTR,
+ error = sysfs_add_file_mode_ns(dir_sd, *attr, false,
(*attr)->mode | mode,
NULL);
if (unlikely(error))
@@ -278,7 +277,7 @@ int sysfs_merge_group(struct kobject *kobj,
return -ENOENT;

for ((i = 0, attr = grp->attrs); *attr && !error; (++i, ++attr))
- error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
+ error = sysfs_add_file(dir_sd, *attr, false);
if (error) {
while (--i >= 0)
kernfs_remove_by_name(dir_sd, (*--attr)->name);
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 037a892..b3c717a 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -269,7 +269,6 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
inode->i_fop = &sysfs_dir_operations;
break;
case SYSFS_KOBJ_ATTR:
- case SYSFS_KOBJ_BIN_ATTR:
inode->i_size = sd->s_attr.size;
inode->i_fop = &kernfs_file_operations;
break;
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index d40e85e..28898fa 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -83,10 +83,9 @@ struct sysfs_dirent {
#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_ACTIVE_REF (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR)
+#define SYSFS_ACTIVE_REF SYSFS_KOBJ_ATTR

#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK
#define SYSFS_FLAG_NS 0x01000
@@ -115,10 +114,8 @@ do { \
static inline bool sysfs_ignore_lockdep(struct sysfs_dirent *sd)
{
struct attribute *attr = sd->priv;
- int type = sysfs_type(sd);

- return (type == SYSFS_KOBJ_ATTR || type == SYSFS_KOBJ_BIN_ATTR) &&
- attr->ignore_lockdep;
+ return sysfs_type(sd) == SYSFS_KOBJ_ATTR && attr->ignore_lockdep;
}

#else
@@ -219,10 +216,10 @@ int sysfs_inode_init(void);
extern const struct file_operations kernfs_file_operations;

int sysfs_add_file(struct sysfs_dirent *dir_sd,
- const struct attribute *attr, int type);
+ const struct attribute *attr, bool is_bin);

int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
- const struct attribute *attr, int type,
+ const struct attribute *attr, bool is_bin,
umode_t amode, const void *ns);
void sysfs_unmap_bin_file(struct sysfs_dirent *sd);

--
1.8.4.2