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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
parent bbd1ae412c
commit 0f4238958d
4 changed files with 85 additions and 18 deletions
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fs/sysfs/file.c
+10 -4
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@@ -477,11 +477,10 @@ const struct file_operations sysfs_file_operations = {
.poll = sysfs_poll,
};
int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
int type)
int sysfs_add_file_mode(struct sysfs_dirent *dir_sd,
const struct attribute *attr, int type, mode_t amode)
{
umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
umode_t mode = (amode & S_IALLUGO) | S_IFREG;
struct sysfs_addrm_cxt acxt;
struct sysfs_dirent *sd;
int rc;
@@ -502,6 +501,13 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
}
int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
int type)
{
return sysfs_add_file_mode(dir_sd, attr, type, attr->mode);
}
/**
* sysfs_create_file - create an attribute file for an object.
* @kobj: object we're creating for.