Commit ac41cfd1 authored by Denis V. Lunev's avatar Denis V. Lunev Committed by Linus Torvalds

isdn: use non-racy method for proc entries creation

Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data
be setup before gluing PDE to main tree.

Add correct ->owner to proc_fops to fix reading/module unloading race.
Signed-off-by: default avatarDenis V. Lunev <den@openvz.org>
Acked-by: default avatarKarsten Keil <kkeil@suse.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a95609cb
......@@ -114,6 +114,7 @@ static int seq_contrstats_open(struct inode *inode, struct file *file)
}
static const struct file_operations proc_controller_ops = {
.owner = THIS_MODULE,
.open = seq_controller_open,
.read = seq_read,
.llseek = seq_lseek,
......@@ -121,6 +122,7 @@ static const struct file_operations proc_controller_ops = {
};
static const struct file_operations proc_contrstats_ops = {
.owner = THIS_MODULE,
.open = seq_contrstats_open,
.read = seq_read,
.llseek = seq_lseek,
......@@ -219,6 +221,7 @@ seq_applstats_open(struct inode *inode, struct file *file)
}
static const struct file_operations proc_applications_ops = {
.owner = THIS_MODULE,
.open = seq_applications_open,
.read = seq_read,
.llseek = seq_lseek,
......@@ -226,21 +229,13 @@ static const struct file_operations proc_applications_ops = {
};
static const struct file_operations proc_applstats_ops = {
.owner = THIS_MODULE,
.open = seq_applstats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static void
create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
{
struct proc_dir_entry *entry;
entry = create_proc_entry(name, mode, NULL);
if (entry)
entry->proc_fops = f;
}
// ---------------------------------------------------------------------------
static void *capi_driver_start(struct seq_file *seq, loff_t *pos)
......@@ -283,6 +278,7 @@ seq_capi_driver_open(struct inode *inode, struct file *file)
}
static const struct file_operations proc_driver_ops = {
.owner = THIS_MODULE,
.open = seq_capi_driver_open,
.read = seq_read,
.llseek = seq_lseek,
......@@ -296,11 +292,11 @@ kcapi_proc_init(void)
{
proc_mkdir("capi", NULL);
proc_mkdir("capi/controllers", NULL);
create_seq_entry("capi/controller", 0, &proc_controller_ops);
create_seq_entry("capi/contrstats", 0, &proc_contrstats_ops);
create_seq_entry("capi/applications", 0, &proc_applications_ops);
create_seq_entry("capi/applstats", 0, &proc_applstats_ops);
create_seq_entry("capi/driver", 0, &proc_driver_ops);
proc_create("capi/controller", 0, NULL, &proc_controller_ops);
proc_create("capi/contrstats", 0, NULL, &proc_contrstats_ops);
proc_create("capi/applications", 0, NULL, &proc_applications_ops);
proc_create("capi/applstats", 0, NULL, &proc_applstats_ops);
proc_create("capi/driver", 0, NULL, &proc_driver_ops);
}
void __exit
......
......@@ -288,13 +288,12 @@ divert_dev_init(void)
isdn_proc_entry = proc_mkdir("isdn", init_net.proc_net);
if (!isdn_proc_entry)
return (-1);
isdn_divert_entry = create_proc_entry("divert", S_IFREG | S_IRUGO, isdn_proc_entry);
isdn_divert_entry = proc_create("divert", S_IFREG | S_IRUGO,
isdn_proc_entry, &isdn_fops);
if (!isdn_divert_entry) {
remove_proc_entry("isdn", init_net.proc_net);
return (-1);
}
isdn_divert_entry->proc_fops = &isdn_fops;
isdn_divert_entry->owner = THIS_MODULE;
#endif /* CONFIG_PROC_FS */
return (0);
......
......@@ -125,15 +125,11 @@ static const struct file_operations divas_fops = {
int create_divas_proc(void)
{
divas_proc_entry = create_proc_entry(divas_proc_name,
S_IFREG | S_IRUGO,
proc_net_eicon);
proc_create(divas_proc_name, S_IFREG | S_IRUGO, proc_net_eicon,
&divas_fops);
if (!divas_proc_entry)
return (0);
divas_proc_entry->proc_fops = &divas_fops;
divas_proc_entry->owner = THIS_MODULE;
return (1);
}
......
......@@ -370,6 +370,7 @@ hysdn_conf_close(struct inode *ino, struct file *filep)
/******************************************************/
static const struct file_operations conf_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = hysdn_conf_read,
.write = hysdn_conf_write,
......@@ -402,11 +403,9 @@ hysdn_procconf_init(void)
while (card) {
sprintf(conf_name, "%s%d", PROC_CONF_BASENAME, card->myid);
if ((card->procconf = (void *) create_proc_entry(conf_name,
S_IFREG | S_IRUGO | S_IWUSR,
hysdn_proc_entry)) != NULL) {
((struct proc_dir_entry *) card->procconf)->proc_fops = &conf_fops;
((struct proc_dir_entry *) card->procconf)->owner = THIS_MODULE;
if ((card->procconf = (void *) proc_create(conf_name,
S_IFREG | S_IRUGO | S_IWUSR,
hysdn_proc_entry)) != NULL) {
hysdn_proclog_init(card); /* init the log file entry */
}
card = card->next; /* next entry */
......
......@@ -380,6 +380,7 @@ hysdn_log_poll(struct file *file, poll_table * wait)
/**************************************************/
static const struct file_operations log_fops =
{
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = hysdn_log_read,
.write = hysdn_log_write,
......@@ -402,10 +403,9 @@ hysdn_proclog_init(hysdn_card * card)
if ((pd = kzalloc(sizeof(struct procdata), GFP_KERNEL)) != NULL) {
sprintf(pd->log_name, "%s%d", PROC_LOG_BASENAME, card->myid);
if ((pd->log = create_proc_entry(pd->log_name, S_IFREG | S_IRUGO | S_IWUSR, hysdn_proc_entry)) != NULL) {
pd->log->proc_fops = &log_fops;
pd->log->owner = THIS_MODULE;
}
pd->log = proc_create(pd->log_name,
S_IFREG | S_IRUGO | S_IWUSR, hysdn_proc_entry,
&log_fops);
init_waitqueue_head(&(pd->rd_queue));
......
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