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[SCSI] sysfs: make group is_valid return a mode_t

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We have a problem in scsi_transport_spi in that we need to customise
not only the visibility of the attributes, but also their mode.  Fix
this by making the is_visible() callback return a mode, with 0
indicating is not visible.

Also add a sysfs_update_group() API to allow us to change either the
visibility or mode of the files at any time on the fly.

Acked-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley 2008-03-20 20:47:52 -05:00
commit 0f4238958d
4 changed files with 85 additions and 18 deletions
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4
include/linux/sysfs.h
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@ -32,7 +32,7 @@ struct attribute {
struct attribute_group {
const char *name;
int (*is_visible)(struct kobject *,
mode_t (*is_visible)(struct kobject *,
struct attribute *, int);
struct attribute **attrs;
};
@ -105,6 +105,8 @@ void sysfs_remove_link(struct kobject *kobj, const char *name);
int __must_check sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp);
int sysfs_update_group(struct kobject *kobj,
const struct attribute_group *grp);
void sysfs_remove_group(struct kobject *kobj,
const struct attribute_group *grp);
int sysfs_add_file_to_group(struct kobject *kobj,