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authorDan Williams <dan.j.williams@intel.com>2020-06-26 02:51:03 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-07-01 20:16:30 +0300
commit3022c6a1b4b76c40aab9dcdf5142c501f3d3ae8c (patch)
tree0dee6f3f0602b3d13069f589dde950bc90854068 /include/linux/sysfs.h
parent9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68 (diff)
downloadlinux-3022c6a1b4b76c40aab9dcdf5142c501f3d3ae8c.tar.xz
driver-core: Introduce DEVICE_ATTR_ADMIN_{RO,RW}
A common pattern for using plain DEVICE_ATTR() instead of DEVICE_ATTR_RO() and DEVICE_ATTR_RW() is for attributes that want to limit read to only root. I.e. many users of DEVICE_ATTR() are specifying 0400 or 0600 for permissions. Given the expectation that CAP_SYS_ADMIN is needed to access these sensitive attributes and an explicit helper with the _ADMIN_ identifier for DEVICE_ATTR_ADMIN_{RO,RW}. Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Link: https://lore.kernel.org/r/159312906372.1850128.11611897078988158727.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/sysfs.h')
-rw-r--r--include/linux/sysfs.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 86067dbe7745..34e84122f635 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -123,6 +123,13 @@ struct attribute_group {
.show = _name##_show, \
}
+#define __ATTR_RW_MODE(_name, _mode) { \
+ .attr = { .name = __stringify(_name), \
+ .mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
+ .show = _name##_show, \
+ .store = _name##_store, \
+}
+
#define __ATTR_WO(_name) { \
.attr = { .name = __stringify(_name), .mode = 0200 }, \
.store = _name##_store, \