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-rw-r--r--fs/sysfs/group.c26
-rw-r--r--include/linux/sysfs.h2
-rw-r--r--kernel/params.c2
3 files changed, 19 insertions, 11 deletions
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index d197237..0871c3d 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -16,25 +16,31 @@
#include "sysfs.h"
-static void remove_files(struct sysfs_dirent *dir_sd,
+static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
const struct attribute_group *grp)
{
struct attribute *const* attr;
+ int i;
- for (attr = grp->attrs; *attr; attr++)
- sysfs_hash_and_remove(dir_sd, (*attr)->name);
+ for (i = 0, attr = grp->attrs; *attr; i++, attr++)
+ if (!grp->is_visible ||
+ grp->is_visible(kobj, *attr, i))
+ sysfs_hash_and_remove(dir_sd, (*attr)->name);
}
-static int create_files(struct sysfs_dirent *dir_sd,
+static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
const struct attribute_group *grp)
{
struct attribute *const* attr;
- int error = 0;
+ int error = 0, i;
- for (attr = grp->attrs; *attr && !error; attr++)
- error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
+ for (i = 0, attr = grp->attrs; *attr && !error; i++, attr++)
+ if (!grp->is_visible ||
+ grp->is_visible(kobj, *attr, i))
+ error |=
+ sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
if (error)
- remove_files(dir_sd, grp);
+ remove_files(dir_sd, kobj, grp);
return error;
}
@@ -54,7 +60,7 @@ int sysfs_create_group(struct kobject * kobj,
} else
sd = kobj->sd;
sysfs_get(sd);
- error = create_files(sd, grp);
+ error = create_files(sd, kobj, grp);
if (error) {
if (grp->name)
sysfs_remove_subdir(sd);
@@ -75,7 +81,7 @@ void sysfs_remove_group(struct kobject * kobj,
} else
sd = sysfs_get(dir_sd);
- remove_files(sd, grp);
+ remove_files(sd, kobj, grp);
if (grp->name)
sysfs_remove_subdir(sd);
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 149ab62..8027104 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -32,6 +32,8 @@ struct attribute {
struct attribute_group {
const char *name;
+ int (*is_visible)(struct kobject *,
+ struct attribute *, int);
struct attribute **attrs;
};
diff --git a/kernel/params.c b/kernel/params.c
index 7686417..dfef464 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -472,7 +472,7 @@ param_sysfs_setup(struct module_kobject *mk,
sizeof(mp->grp.attrs[0]));
size[1] = (valid_attrs + 1) * sizeof(mp->grp.attrs[0]);
- mp = kmalloc(size[0] + size[1], GFP_KERNEL);
+ mp = kzalloc(size[0] + size[1], GFP_KERNEL);
if (!mp)
return ERR_PTR(-ENOMEM);
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