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| author | Kay Sievers <kay.sievers@vrfy.org> | 2009-09-18 23:01:12 +0200 |
|---|---|---|
| committer | Live-CD User <linux@linux.site> | 2009-09-19 12:50:38 -0700 |
| commit | e454cea20bdcff10ee698d11b8882662a0153a47 (patch) | |
| tree | f44581fe57787aef0a4f4dc00993a90ea8e688f6 /drivers/base/core.c | |
| parent | 78f28b7c555359c67c2a0d23f7436e915329421e (diff) | |
| download | linux-e454cea20bdcff10ee698d11b8882662a0153a47.tar.gz linux-e454cea20bdcff10ee698d11b8882662a0153a47.tar.bz2 linux-e454cea20bdcff10ee698d11b8882662a0153a47.zip | |
Driver-Core: extend devnode callbacks to provide permissions
This allows subsytems to provide devtmpfs with non-default permissions
for the device node. Instead of the default mode of 0600, null, zero,
random, urandom, full, tty, ptmx now have a mode of 0666, which allows
non-privileged processes to access standard device nodes in case no
other userspace process applies the expected permissions.
This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 390e664ec1c7..6bee6af8d8e1 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -166,13 +166,16 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, if (MAJOR(dev->devt)) { const char *tmp; const char *name; + mode_t mode = 0; add_uevent_var(env, "MAJOR=%u", MAJOR(dev->devt)); add_uevent_var(env, "MINOR=%u", MINOR(dev->devt)); - name = device_get_nodename(dev, &tmp); + name = device_get_devnode(dev, &mode, &tmp); if (name) { add_uevent_var(env, "DEVNAME=%s", name); kfree(tmp); + if (mode) + add_uevent_var(env, "DEVMODE=%#o", mode & 0777); } } @@ -1148,8 +1151,9 @@ static struct device *next_device(struct klist_iter *i) } /** - * device_get_nodename - path of device node file + * device_get_devnode - path of device node file * @dev: device + * @mode: returned file access mode * @tmp: possibly allocated string * * Return the relative path of a possible device node. @@ -1157,21 +1161,22 @@ static struct device *next_device(struct klist_iter *i) * a name. This memory is returned in tmp and needs to be * freed by the caller. */ -const char *device_get_nodename(struct device *dev, const char **tmp) +const char *device_get_devnode(struct device *dev, + mode_t *mode, const char **tmp) { char *s; *tmp = NULL; /* the device type may provide a specific name */ - if (dev->type && dev->type->nodename) - *tmp = dev->type->nodename(dev); + if (dev->type && dev->type->devnode) + *tmp = dev->type->devnode(dev, mode); if (*tmp) return *tmp; /* the class may provide a specific name */ - if (dev->class && dev->class->nodename) - *tmp = dev->class->nodename(dev); + if (dev->class && dev->class->devnode) + *tmp = dev->class->devnode(dev, mode); if (*tmp) return *tmp; |