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| author | Guenter Roeck <linux@roeck-us.net> | 2015-03-12 09:58:26 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-25 13:27:57 +0100 |
| commit | da4759c73b0f1aac79f37bdb39ad2124439c30e7 (patch) | |
| tree | 011082768adf0cd5a01df1509a242640dec90b2c /fs/sysfs | |
| parent | bc465aa9d045feb0e13b4a8f32cc33c1943f62d6 (diff) | |
| download | linux-stable-da4759c73b0f1aac79f37bdb39ad2124439c30e7.tar.gz linux-stable-da4759c73b0f1aac79f37bdb39ad2124439c30e7.tar.bz2 linux-stable-da4759c73b0f1aac79f37bdb39ad2124439c30e7.zip | |
sysfs: Use only return value from is_visible for the file mode
Up to now, is_visible can only be used to either remove visibility
of a file entirely or to add permissions, but not to reduce permissions.
This makes it impossible, for example, to use DEVICE_ATTR_RW to define
file attributes and reduce permissions to read-only.
This behavior is undesirable and unnecessarily complicates code which
needs to reduce permissions; instead of just returning the desired
permissions, it has to ensure that the permissions in the attribute
variable declaration only reflect the minimal permissions ever needed.
Change semantics of is_visible to only use the permissions returned
from it instead of oring the returned value with the hard-coded
permissions.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/group.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index 2554d8835b48..3fdccd99a9d9 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -41,7 +41,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, if (grp->attrs) { for (i = 0, attr = grp->attrs; *attr && !error; i++, attr++) { - umode_t mode = 0; + umode_t mode = (*attr)->mode; /* * In update mode, we're changing the permissions or @@ -56,8 +56,7 @@ static int create_files(struct kernfs_node *parent, struct kobject *kobj, continue; } error = sysfs_add_file_mode_ns(parent, *attr, false, - (*attr)->mode | mode, - NULL); + mode, NULL); if (unlikely(error)) break; } |