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Driver core: change add_uevent_var to use a struct

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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>
This commit is contained in:
Kay Sievers
2007-08-14 15:15:12 +02:00
committed by Greg Kroah-Hartman
parent 8380770c84
commit 7eff2e7a8b
47 changed files with 300 additions and 636 deletions
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17
drivers/ieee1394/nodemgr.c
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@@ -153,8 +153,7 @@ struct host_info {
};
static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
static int nodemgr_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size);
static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
static void nodemgr_resume_ne(struct node_entry *ne);
static void nodemgr_remove_ne(struct node_entry *ne);
static struct node_entry *find_entry_by_guid(u64 guid);
@@ -1160,12 +1159,9 @@ static void nodemgr_process_root_directory(struct host_info *hi, struct node_ent
#ifdef CONFIG_HOTPLUG
static int nodemgr_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct unit_directory *ud;
int i = 0;
int length = 0;
int retval = 0;
/* ieee1394:venNmoNspNverN */
char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
@@ -1180,9 +1176,7 @@ static int nodemgr_uevent(struct device *dev, char **envp, int num_envp,
#define PUT_ENVP(fmt,val) \
do { \
retval = add_uevent_var(envp, num_envp, &i, \
buffer, buffer_size, &length, \
fmt, val); \
retval = add_uevent_var(env, fmt, val); \
if (retval) \
return retval; \
} while (0)
@@ -1201,15 +1195,12 @@ do { \
#undef PUT_ENVP
envp[i] = NULL;
return 0;
}
#else
static int nodemgr_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}