sysfs: explicitly pass size to sysfs_add_bin_file_mode_ns()

Upcoming changes to the sysfs core require the size of the created file
to be overridable by the caller.
Add a parameter to enable this.
For now keep using attr->size in all cases.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Krzysztof Wilczyński <kw@linux.com>
Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-1-71110628844c@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index d1995e2d6c943a644ff9f34cf2488864d57daf81..6d39696b43069010b0ad0bdaadcf9002cb70c92c 100644 (file)
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -315,7 +315,7 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent,
 }
 
 int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent,
-               const struct bin_attribute *battr, umode_t mode,
+               const struct bin_attribute *battr, umode_t mode, size_t size,
                kuid_t uid, kgid_t gid, const void *ns)
 {
        const struct attribute *attr = &battr->attr;
@@ -340,7 +340,7 @@ int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent,
 #endif
 
        kn = __kernfs_create_file(parent, attr->name, mode & 0777, uid, gid,
-                                 battr->size, ops, (void *)attr, ns, key);
+                                 size, ops, (void *)attr, ns, key);
        if (IS_ERR(kn)) {
                if (PTR_ERR(kn) == -EEXIST)
                        sysfs_warn_dup(parent, attr->name);
@@ -580,8 +580,8 @@ int sysfs_create_bin_file(struct kobject *kobj,
                return -EINVAL;
 
        kobject_get_ownership(kobj, &uid, &gid);
-       return sysfs_add_bin_file_mode_ns(kobj->sd, attr, attr->attr.mode, uid,
-                                          gid, NULL);
+       return sysfs_add_bin_file_mode_ns(kobj->sd, attr, attr->attr.mode,
+                                         attr->size, uid, gid, NULL);
 }
 EXPORT_SYMBOL_GPL(sysfs_create_bin_file);
 

diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index d22ad67a0f3291f4702f494939528d5d13c31fae..45b2e92941da1f49dcc71af3781317c61480c956 100644 (file)
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -87,6 +87,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj,
        if (grp->bin_attrs) {
                for (i = 0, bin_attr = grp->bin_attrs; *bin_attr; i++, bin_attr++) {
                        umode_t mode = (*bin_attr)->attr.mode;
+                       size_t size = (*bin_attr)->size;
 
                        if (update)
                                kernfs_remove_by_name(parent,
@@ -104,7 +105,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj,
 
                        mode &= SYSFS_PREALLOC | 0664;
                        error = sysfs_add_bin_file_mode_ns(parent, *bin_attr,
-                                                          mode, uid, gid,
+                                                          mode, size, uid, gid,
                                                           NULL);
                        if (error)
                                break;

diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 3f28c9af57562f61a00a47935579f0939cbfd4dc..8e012f25e1c06e802c3138cc2715b46c1f67fa48 100644 (file)
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -31,7 +31,7 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent,
                const struct attribute *attr, umode_t amode, kuid_t uid,
                kgid_t gid, const void *ns);
 int sysfs_add_bin_file_mode_ns(struct kernfs_node *parent,
-               const struct bin_attribute *battr, umode_t mode,
+               const struct bin_attribute *battr, umode_t mode, size_t size,
                kuid_t uid, kgid_t gid, const void *ns);
 
 /*