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configfs: Add CONFIGFS_ATTR_PERM helper

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This new helper allows creating rw files with custom
permissions.

Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Link: https://lore.kernel.org/r/20250420104726.2963750-1-richard@nod.at
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
This commit is contained in:
Richard Weinberger
2025-04-20 12:47:25 +02:00
committed by Andreas Hindborg
parent 8ffd015db8
commit eae324ca64
1 changed files with 6 additions and 2 deletions
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8
include/linux/configfs.h
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@@ -120,15 +120,19 @@ struct configfs_attribute {
ssize_t (*store)(struct config_item *, const char *, size_t);
};
#define CONFIGFS_ATTR(_pfx, _name) \
#define CONFIGFS_ATTR_PERM(_pfx, _name, _perm) \
static struct configfs_attribute _pfx##attr_##_name = { \
.ca_name = __stringify(_name), \
.ca_mode = S_IRUGO | S_IWUSR, \
.ca_mode = _perm, \
.ca_owner = THIS_MODULE, \
.show = _pfx##_name##_show, \
.store = _pfx##_name##_store, \
}
#define CONFIGFS_ATTR(_pfx, _name) CONFIGFS_ATTR_PERM( \
_pfx, _name, S_IRUGO | S_IWUSR \
)
#define CONFIGFS_ATTR_RO(_pfx, _name) \
static struct configfs_attribute _pfx##attr_##_name = { \
.ca_name = __stringify(_name), \