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author | Kay Sievers <kay.sievers@vrfy.org> | 2007-08-14 15:15:12 +0200 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 23:51:01 +0200 |
commit | 7eff2e7a8b65c25920207324e56611150eb1cd9a (patch) | |
tree | 02a0eeba9d25d996233e30c18f258dfae0ae2139 /block | |
parent | Driver core: make sysfs uevent-attributes static (diff) | |
download | linux-7eff2e7a8b65c25920207324e56611150eb1cd9a.tar.xz linux-7eff2e7a8b65c25920207324e56611150eb1cd9a.zip |
Driver core: change add_uevent_var to use a struct
This changes the uevent buffer functions to use a struct instead of a
long list of parameters. It does no longer require the caller to do the
proper buffer termination and size accounting, which is currently wrong
in some places. It fixes a known bug where parts of the uevent
environment are overwritten because of wrong index calculations.
Many thanks to Mathieu Desnoyers for finding bugs and improving the
error handling.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'block')
-rw-r--r-- | block/genhd.c | 35 |
1 files changed, 8 insertions, 27 deletions
diff --git a/block/genhd.c b/block/genhd.c index 3af1e7a378d4..e609996f2e76 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -540,61 +540,42 @@ static int block_uevent_filter(struct kset *kset, struct kobject *kobj) return ((ktype == &ktype_block) || (ktype == &ktype_part)); } -static int block_uevent(struct kset *kset, struct kobject *kobj, char **envp, - int num_envp, char *buffer, int buffer_size) +static int block_uevent(struct kset *kset, struct kobject *kobj, + struct kobj_uevent_env *env) { struct kobj_type *ktype = get_ktype(kobj); struct device *physdev; struct gendisk *disk; struct hd_struct *part; - int length = 0; - int i = 0; if (ktype == &ktype_block) { disk = container_of(kobj, struct gendisk, kobj); - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, - &length, "MINOR=%u", disk->first_minor); + add_uevent_var(env, "MINOR=%u", disk->first_minor); } else if (ktype == &ktype_part) { disk = container_of(kobj->parent, struct gendisk, kobj); part = container_of(kobj, struct hd_struct, kobj); - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, - &length, "MINOR=%u", + add_uevent_var(env, "MINOR=%u", disk->first_minor + part->partno); } else return 0; - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, - "MAJOR=%u", disk->major); + add_uevent_var(env, "MAJOR=%u", disk->major); /* add physical device, backing this device */ physdev = disk->driverfs_dev; if (physdev) { char *path = kobject_get_path(&physdev->kobj, GFP_KERNEL); - add_uevent_var(envp, num_envp, &i, buffer, buffer_size, - &length, "PHYSDEVPATH=%s", path); + add_uevent_var(env, "PHYSDEVPATH=%s", path); kfree(path); if (physdev->bus) - add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "PHYSDEVBUS=%s", - physdev->bus->name); + add_uevent_var(env, "PHYSDEVBUS=%s", physdev->bus->name); if (physdev->driver) - add_uevent_var(envp, num_envp, &i, - buffer, buffer_size, &length, - "PHYSDEVDRIVER=%s", - physdev->driver->name); + add_uevent_var(env, physdev->driver->name); } - /* terminate, set to next free slot, shrink available space */ - envp[i] = NULL; - envp = &envp[i]; - num_envp -= i; - buffer = &buffer[length]; - buffer_size -= length; - return 0; } |