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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-12 10:01:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-12 10:01:59 -0700
commit26df0766a73a859bb93dc58e747c5028557a23fd (patch)
tree4776de567425a7fb66ca9a87228309f9c84de633
parent580287628cdd99366b10c9050c4479b387283be8 (diff)
parenta6de51b2787012ba3ab62c7d50df1b749b83d5f0 (diff)
downloadmrst-s0i3-test-26df0766a73a859bb93dc58e747c5028557a23fd.tar.gz
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Merge branch 'params' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* 'params' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (22 commits) param: don't deref arg in __same_type() checks param: update drivers/acpi/debug.c to new scheme param: use module_param in drivers/message/fusion/mptbase.c ide: use module_param_named rather than module_param_call param: update drivers/char/ipmi/ipmi_watchdog.c to new scheme param: lock if_sdio's lbs_helper_name and lbs_fw_name against sysfs changes. param: lock myri10ge_fw_name against sysfs changes. param: simple locking for sysfs-writable charp parameters param: remove unnecessary writable charp param: add kerneldoc to moduleparam.h param: locking for kernel parameters param: make param sections const. param: use free hook for charp (fix leak of charp parameters) param: add a free hook to kernel_param_ops. param: silence .init.text references from param ops Add param ops struct for hvc_iucv driver. nfs: update for module_param_named API change AppArmor: update for module_param_named API change param: use ops in struct kernel_param, rather than get and set fns directly param: move the EXPORT_SYMBOL to after the definitions. ...
-rw-r--r--Documentation/cpu-hotplug.txt2
-rw-r--r--arch/um/drivers/hostaudio_kern.c10
-rw-r--r--drivers/acpi/debug.c32
-rw-r--r--drivers/char/hvc_iucv.c9
-rw-r--r--drivers/char/ipmi/ipmi_watchdog.c42
-rw-r--r--drivers/ide/ide.c20
-rw-r--r--drivers/input/misc/ati_remote2.c26
-rw-r--r--drivers/input/mouse/psmouse-base.c14
-rw-r--r--drivers/message/fusion/mptbase.c3
-rw-r--r--drivers/misc/lkdtm.c4
-rw-r--r--drivers/net/myri10ge/myri10ge.c54
-rw-r--r--drivers/net/wireless/libertas/if_sdio.c32
-rw-r--r--drivers/net/wireless/libertas/if_usb.c3
-rw-r--r--drivers/net/wireless/libertas_tf/if_usb.c3
-rw-r--r--drivers/scsi/bfa/bfad.c2
-rw-r--r--drivers/staging/rtl8187se/r8180_core.c6
-rw-r--r--drivers/staging/rtl8192e/r8192E_core.c6
-rw-r--r--drivers/staging/rtl8192su/r8192U_core.c6
-rw-r--r--drivers/usb/atm/ueagle-atm.c2
-rw-r--r--drivers/video/uvesafb.c7
-rw-r--r--drivers/video/vt8623fb.c2
-rw-r--r--fs/nfs/callback.c11
-rw-r--r--include/linux/moduleparam.h288
-rw-r--r--init/main.c8
-rw-r--r--kernel/params.c233
-rw-r--r--net/mac80211/rate.c2
-rw-r--r--net/sunrpc/auth.c9
-rw-r--r--net/sunrpc/xprtsock.c26
-rw-r--r--scripts/mod/modpost.c13
-rw-r--r--security/apparmor/lsm.c36
30 files changed, 658 insertions, 253 deletions
diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt
index a99d7031cdf..45d5a217484 100644
--- a/Documentation/cpu-hotplug.txt
+++ b/Documentation/cpu-hotplug.txt
@@ -2,7 +2,7 @@
Maintainers:
CPU Hotplug Core:
- Rusty Russell <rusty@rustycorp.com.au>
+ Rusty Russell <rusty@rustcorp.com.au>
Srivatsa Vaddagiri <vatsa@in.ibm.com>
i386:
Zwane Mwaikambo <zwane@arm.linux.org.uk>
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 68142df7660..0c46e398cd8 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -187,7 +187,9 @@ static int hostaudio_open(struct inode *inode, struct file *file)
int ret;
#ifdef DEBUG
+ kparam_block_sysfs_write(dsp);
printk(KERN_DEBUG "hostaudio: open called (host: %s)\n", dsp);
+ kparam_unblock_sysfs_write(dsp);
#endif
state = kmalloc(sizeof(struct hostaudio_state), GFP_KERNEL);
@@ -199,9 +201,11 @@ static int hostaudio_open(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE)
w = 1;
+ kparam_block_sysfs_write(dsp);
lock_kernel();
ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
unlock_kernel();
+ kparam_unblock_sysfs_write(dsp);
if (ret < 0) {
kfree(state);
@@ -258,13 +262,17 @@ static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE)
w = 1;
+ kparam_block_sysfs_write(mixer);
lock_kernel();
ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
unlock_kernel();
+ kparam_unblock_sysfs_write(mixer);
if (ret < 0) {
+ kparam_block_sysfs_write(dsp);
printk(KERN_ERR "hostaudio_open_mixdev failed to open '%s', "
"err = %d\n", dsp, -ret);
+ kparam_unblock_sysfs_write(dsp);
kfree(state);
return ret;
}
@@ -320,8 +328,10 @@ MODULE_LICENSE("GPL");
static int __init hostaudio_init_module(void)
{
+ __kernel_param_lock();
printk(KERN_INFO "UML Audio Relay (host dsp = %s, host mixer = %s)\n",
dsp, mixer);
+ __kernel_param_unlock();
module_data.dev_audio = register_sound_dsp(&hostaudio_fops, -1);
if (module_data.dev_audio < 0) {
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index 146135e7a6a..295dbfa2db9 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -96,7 +96,8 @@ static const struct acpi_dlevel acpi_debug_levels[] = {
/* --------------------------------------------------------------------------
FS Interface (/sys)
-------------------------------------------------------------------------- */
-static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
+static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
+{
int result = 0;
int i;
@@ -118,7 +119,8 @@ static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
return result;
}
-static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
+static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
+{
int result = 0;
int i;
@@ -137,8 +139,18 @@ static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
return result;
}
-module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
-module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
+static struct kernel_param_ops acpi_debug_layer_ops = {
+ .set = param_set_uint,
+ .get = param_get_debug_layer,
+};
+
+static struct kernel_param_ops acpi_debug_level_ops = {
+ .set = param_set_uint,
+ .get = param_get_debug_level,
+};
+
+module_param_cb(debug_layer, &acpi_debug_layer_ops, &acpi_dbg_layer, 0644);
+module_param_cb(debug_level, &acpi_debug_level_ops, &acpi_dbg_level, 0644);
static char trace_method_name[6];
module_param_string(trace_method_name, trace_method_name, 6, 0644);
@@ -147,7 +159,7 @@ module_param(trace_debug_layer, uint, 0644);
static unsigned int trace_debug_level;
module_param(trace_debug_level, uint, 0644);
-static int param_set_trace_state(const char *val, struct kernel_param *kp)
+static int param_set_trace_state(const char *val, const struct kernel_param *kp)
{
int result = 0;
@@ -181,7 +193,7 @@ exit:
return result;
}
-static int param_get_trace_state(char *buffer, struct kernel_param *kp)
+static int param_get_trace_state(char *buffer, const struct kernel_param *kp)
{
if (!acpi_gbl_trace_method_name)
return sprintf(buffer, "disable");
@@ -194,8 +206,12 @@ static int param_get_trace_state(char *buffer, struct kernel_param *kp)
return 0;
}
-module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
- NULL, 0644);
+static struct kernel_param_ops param_ops_trace_state = {
+ .set = param_set_trace_state,
+ .get = param_get_trace_state,
+};
+
+module_param_cb(trace_state, &param_ops_trace_state, NULL, 0644);
/* --------------------------------------------------------------------------
DebugFS Interface
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
index 5a80ad68ef2..7b01bc609de 100644
--- a/drivers/char/hvc_iucv.c
+++ b/drivers/char/hvc_iucv.c
@@ -1149,7 +1149,7 @@ out_err:
* Note: If it is called early in the boot process, @val is stored and
* parsed later in hvc_iucv_init().
*/
-static int param_set_vmidfilter(const char *val, struct kernel_param *kp)
+static int param_set_vmidfilter(const char *val, const struct kernel_param *kp)
{
int rc;
@@ -1176,7 +1176,7 @@ static int param_set_vmidfilter(const char *val, struct kernel_param *kp)
* The function stores the filter as a comma-separated list of z/VM user IDs
* in @buffer. Typically, sysfs routines call this function for attr show.
*/
-static int param_get_vmidfilter(char *buffer, struct kernel_param *kp)
+static int param_get_vmidfilter(char *buffer, const struct kernel_param *kp)
{
int rc;
size_t index, len;
@@ -1203,6 +1203,11 @@ static int param_get_vmidfilter(char *buffer, struct kernel_param *kp)
#define param_check_vmidfilter(name, p) __param_check(name, p, void)
+static struct kernel_param_ops param_ops_vmidfilter = {
+ .set = param_set_vmidfilter,
+ .get = param_get_vmidfilter,
+};
+
/**
* hvc_iucv_init() - z/VM IUCV HVC device driver initialization
*/
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 82bcdb262a3..654d566ca57 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -196,7 +196,7 @@ static void ipmi_unregister_watchdog(int ipmi_intf);
*/
static int start_now;
-static int set_param_int(const char *val, struct kernel_param *kp)
+static int set_param_timeout(const char *val, const struct kernel_param *kp)
{
char *endp;
int l;
@@ -215,10 +215,11 @@ static int set_param_int(const char *val, struct kernel_param *kp)
return rv;
}
-static int get_param_int(char *buffer, struct kernel_param *kp)
-{
- return sprintf(buffer, "%i", *((int *)kp->arg));
-}
+static struct kernel_param_ops param_ops_timeout = {
+ .set = set_param_timeout,
+ .get = param_get_int,
+};
+#define param_check_timeout param_check_int
typedef int (*action_fn)(const char *intval, char *outval);
@@ -227,7 +228,7 @@ static int preaction_op(const char *inval, char *outval);
static int preop_op(const char *inval, char *outval);
static void check_parms(void);
-static int set_param_str(const char *val, struct kernel_param *kp)
+static int set_param_str(const char *val, const struct kernel_param *kp)
{
action_fn fn = (action_fn) kp->arg;
int rv = 0;
@@ -251,7 +252,7 @@ static int set_param_str(const char *val, struct kernel_param *kp)
return rv;
}
-static int get_param_str(char *buffer, struct kernel_param *kp)
+static int get_param_str(char *buffer, const struct kernel_param *kp)
{
action_fn fn = (action_fn) kp->arg;
int rv;
@@ -263,7 +264,7 @@ static int get_param_str(char *buffer, struct kernel_param *kp)
}
-static int set_param_wdog_ifnum(const char *val, struct kernel_param *kp)
+static int set_param_wdog_ifnum(const char *val, const struct kernel_param *kp)
{
int rv = param_set_int(val, kp);
if (rv)
@@ -276,27 +277,38 @@ static int set_param_wdog_ifnum(const char *val, struct kernel_param *kp)
return 0;
}
-module_param_call(ifnum_to_use, set_param_wdog_ifnum, get_param_int,
- &ifnum_to_use, 0644);
+static struct kernel_param_ops param_ops_wdog_ifnum = {
+ .set = set_param_wdog_ifnum,
+ .get = param_get_int,
+};
+
+#define param_check_wdog_ifnum param_check_int
+
+static struct kernel_param_ops param_ops_str = {
+ .set = set_param_str,
+ .get = get_param_str,
+};
+
+module_param(ifnum_to_use, wdog_ifnum, 0644);
MODULE_PARM_DESC(ifnum_to_use, "The interface number to use for the watchdog "
"timer. Setting to -1 defaults to the first registered "
"interface");
-module_param_call(timeout, set_param_int, get_param_int, &timeout, 0644);
+module_param(timeout, timeout, 0644);
MODULE_PARM_DESC(timeout, "Timeout value in seconds.");
-module_param_call(pretimeout, set_param_int, get_param_int, &pretimeout, 0644);
+module_param(pretimeout, timeout, 0644);
MODULE_PARM_DESC(pretimeout, "Pretimeout value in seconds.");
-module_param_call(action, set_param_str, get_param_str, action_op, 0644);
+module_param_cb(action, &param_ops_str, action_op, 0644);
MODULE_PARM_DESC(action, "Timeout action. One of: "
"reset, none, power_cycle, power_off.");
-module_param_call(preaction, set_param_str, get_param_str, preaction_op, 0644);
+module_param_cb(preaction, &param_ops_str, preaction_op, 0644);
MODULE_PARM_DESC(preaction, "Pretimeout action. One of: "
"pre_none, pre_smi, pre_nmi, pre_int.");
-module_param_call(preop, set_param_str, get_param_str, preop_op, 0644);
+module_param_cb(preop, &param_ops_str, preop_op, 0644);
MODULE_PARM_DESC(preop, "Pretimeout driver operation. One of: "
"preop_none, preop_panic, preop_give_data.");
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 3cb9c4e056f..fa896210ed7 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -177,7 +177,7 @@ EXPORT_SYMBOL_GPL(ide_pci_clk);
module_param_named(pci_clock, ide_pci_clk, int, 0);
MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
-static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
+static int ide_set_dev_param_mask(const char *s, const struct kernel_param *kp)
{
int a, b, i, j = 1;
unsigned int *dev_param_mask = (unsigned int *)kp->arg;
@@ -200,34 +200,40 @@ static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
return 0;
}
+static struct kernel_param_ops param_ops_ide_dev_mask = {
+ .set = ide_set_dev_param_mask
+};
+
+#define param_check_ide_dev_mask(name, p) param_check_uint(name, p)
+
static unsigned int ide_nodma;
-module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
+module_param_named(nodma, ide_nodma, ide_dev_mask, 0);
MODULE_PARM_DESC(nodma, "disallow DMA for a device");
static unsigned int ide_noflush;
-module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
+module_param_named(noflush, ide_noflush, ide_dev_mask, 0);
MODULE_PARM_DESC(noflush, "disable flush requests for a device");
static unsigned int ide_nohpa;
-module_param_call(nohpa, ide_set_dev_param_mask, NULL, &ide_nohpa, 0);
+module_param_named(nohpa, ide_nohpa, ide_dev_mask, 0);
MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");
static unsigned int ide_noprobe;
-module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
+module_param_named(noprobe, ide_noprobe, ide_dev_mask, 0);
MODULE_PARM_DESC(noprobe, "skip probing for a device");
static unsigned int ide_nowerr;
-module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
+module_param_named(nowerr, ide_nowerr, ide_dev_mask, 0);
MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
static unsigned int ide_cdroms;
-module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
+module_param_named(cdrom, ide_cdroms, ide_dev_mask, 0);
MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
struct chs_geom {
diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
index e148749b585..23257652b8e 100644
--- a/drivers/input/misc/ati_remote2.c
+++ b/drivers/input/misc/ati_remote2.c
@@ -38,7 +38,8 @@ enum {
};
static int ati_remote2_set_mask(const char *val,
- struct kernel_param *kp, unsigned int max)
+ const struct kernel_param *kp,
+ unsigned int max)
{
unsigned long mask;
int ret;
@@ -59,28 +60,31 @@ static int ati_remote2_set_mask(const char *val,
}
static int ati_remote2_set_channel_mask(const char *val,
- struct kernel_param *kp)
+ const struct kernel_param *kp)
{
pr_debug("%s()\n", __func__);
return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
}
-static int ati_remote2_get_channel_mask(char *buffer, struct kernel_param *kp)
+static int ati_remote2_get_channel_mask(char *buffer,
+ const struct kernel_param *kp)
{
pr_debug("%s()\n", __func__);
return sprintf(buffer, "0x%04x", *(unsigned int *)kp->arg);
}
-static int ati_remote2_set_mode_mask(const char *val, struct kernel_param *kp)
+static int ati_remote2_set_mode_mask(const char *val,
+ const struct kernel_param *kp)
{
pr_debug("%s()\n", __func__);
return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
}
-static int ati_remote2_get_mode_mask(char *buffer, struct kernel_param *kp)
+static int ati_remote2_get_mode_mask(char *buffer,
+ const struct kernel_param *kp)
{
pr_debug("%s()\n", __func__);
@@ -89,15 +93,19 @@ static int ati_remote2_get_mode_mask(char *buffer, struct kernel_param *kp)
static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
#define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
-#define param_set_channel_mask ati_remote2_set_channel_mask
-#define param_get_channel_mask ati_remote2_get_channel_mask
+static struct kernel_param_ops param_ops_channel_mask = {
+ .set = ati_remote2_set_channel_mask,
+ .get = ati_remote2_get_channel_mask,
+};
module_param(channel_mask, channel_mask, 0644);
MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");
static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
#define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
-#define param_set_mode_mask ati_remote2_set_mode_mask
-#define param_get_mode_mask ati_remote2_get_mode_mask
+static struct kernel_param_ops param_ops_mode_mask = {
+ .set = ati_remote2_set_mode_mask,
+ .get = ati_remote2_get_mode_mask,
+};
module_param(mode_mask, mode_mask, 0644);
MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 979c5021528..73a7af2542a 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -39,11 +39,13 @@ MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
-static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
-static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
+static struct kernel_param_ops param_ops_proto_abbrev = {
+ .set = psmouse_set_maxproto,
+ .get = psmouse_get_maxproto,
+};
#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
-#define param_set_proto_abbrev psmouse_set_maxproto
-#define param_get_proto_abbrev psmouse_get_maxproto
module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
@@ -1679,7 +1681,7 @@ static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data,
}
-static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
{
const struct psmouse_protocol *proto;
@@ -1696,7 +1698,7 @@ static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
return 0;
}
-static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
{
int type = *((unsigned int *)kp->arg);
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index c54674c482c..b8f1719d7c0 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -110,8 +110,7 @@ MODULE_PARM_DESC(mpt_debug_level, " debug level - refer to mptdebug.h \
int mpt_fwfault_debug;
EXPORT_SYMBOL(mpt_fwfault_debug);
-module_param_call(mpt_fwfault_debug, param_set_int, param_get_int,
- &mpt_fwfault_debug, 0600);
+module_param(mpt_fwfault_debug, int, 0600);
MODULE_PARM_DESC(mpt_fwfault_debug, "Enable detection of Firmware fault"
" and halt Firmware on fault - (default=0)");
diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index 5bfb2a2041b..ef34de7a802 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -124,9 +124,9 @@ static int count = DEFAULT_COUNT;
module_param(recur_count, int, 0644);
MODULE_PARM_DESC(recur_count, " Recursion level for the stack overflow test, "\
"default is 10");
-module_param(cpoint_name, charp, 0644);
+module_param(cpoint_name, charp, 0444);
MODULE_PARM_DESC(cpoint_name, " Crash Point, where kernel is to be crashed");
-module_param(cpoint_type, charp, 0644);
+module_param(cpoint_type, charp, 0444);
MODULE_PARM_DESC(cpoint_type, " Crash Point Type, action to be taken on "\
"hitting the crash point");
module_param(cpoint_count, int, 0644);
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index d771d1650d6..fb2c0927d3c 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -239,6 +239,7 @@ struct myri10ge_priv {
int watchdog_resets;
int watchdog_pause;
int pause;
+ bool fw_name_allocated;
char *fw_name;
char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
char *product_code_string;
@@ -271,6 +272,7 @@ MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
+/* Careful: must be accessed under kparam_block_sysfs_write */
static char *myri10ge_fw_name = NULL;
module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
@@ -376,6 +378,14 @@ static inline void put_be32(__be32 val, __be32 __iomem * p)
static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
+static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
+{
+ if (mgp->fw_name_allocated)
+ kfree(mgp->fw_name);
+ mgp->fw_name = name;
+ mgp->fw_name_allocated = allocated;
+}
+
static int
myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
struct myri10ge_cmd *data, int atomic)
@@ -747,7 +757,7 @@ static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
dev_warn(&mgp->pdev->dev, "via hotplug\n");
}
- mgp->fw_name = "adopted";
+ set_fw_name(mgp, "adopted", false);
mgp->tx_boundary = 2048;
myri10ge_dummy_rdma(mgp, 1);
status = myri10ge_get_firmware_capabilities(mgp);
@@ -3233,7 +3243,7 @@ static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
* load the optimized firmware (which assumes aligned PCIe
* completions) in order to see if it works on this host.
*/
- mgp->fw_name = myri10ge_fw_aligned;
+ set_fw_name(mgp, myri10ge_fw_aligned, false);
status = myri10ge_load_firmware(mgp, 1);
if (status != 0) {
goto abort;
@@ -3261,7 +3271,7 @@ static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
abort:
/* fall back to using the unaligned firmware */
mgp->tx_boundary = 2048;
- mgp->fw_name = myri10ge_fw_unaligned;
+ set_fw_name(mgp, myri10ge_fw_unaligned, false);
}
@@ -3284,7 +3294,7 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
link_width);
mgp->tx_boundary = 4096;
- mgp->fw_name = myri10ge_fw_aligned;
+ set_fw_name(mgp, myri10ge_fw_aligned, false);
} else {
myri10ge_firmware_probe(mgp);
}
@@ -3293,22 +3303,29 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
dev_info(&mgp->pdev->dev,
"Assuming aligned completions (forced)\n");
mgp->tx_boundary = 4096;
- mgp->fw_name = myri10ge_fw_aligned;
+ set_fw_name(mgp, myri10ge_fw_aligned, false);
} else {
dev_info(&mgp->pdev->dev,
"Assuming unaligned completions (forced)\n");
mgp->tx_boundary = 2048;
- mgp->fw_name = myri10ge_fw_unaligned;
+ set_fw_name(mgp, myri10ge_fw_unaligned, false);
}
}
+
+ kparam_block_sysfs_write(myri10ge_fw_name);
if (myri10ge_fw_name != NULL) {
- overridden = 1;
- mgp->fw_name = myri10ge_fw_name;
+ char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
+ if (fw_name) {
+ overridden = 1;
+ set_fw_name(mgp, fw_name, true);
+ }
}
+ kparam_unblock_sysfs_write(myri10ge_fw_name);
+
if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
myri10ge_fw_names[mgp->board_number] != NULL &&
strlen(myri10ge_fw_names[mgp->board_number])) {
- mgp->fw_name = myri10ge_fw_names[mgp->board_number];
+ set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
overridden = 1;
}
if (overridden)
@@ -3660,6 +3677,7 @@ static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
struct myri10ge_cmd cmd;
struct pci_dev *pdev = mgp->pdev;
char *old_fw;
+ bool old_allocated;
int i, status, ncpus, msix_cap;
mgp->num_slices = 1;
@@ -3672,17 +3690,23 @@ static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
/* try to load the slice aware rss firmware */
old_fw = mgp->fw_name;
+ old_allocated = mgp->fw_name_allocated;
+ /* don't free old_fw if we override it. */
+ mgp->fw_name_allocated = false;
+
if (myri10ge_fw_name != NULL) {
dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
myri10ge_fw_name);
- mgp->fw_name = myri10ge_fw_name;
+ set_fw_name(mgp, myri10ge_fw_name, false);
} else if (old_fw == myri10ge_fw_aligned)
- mgp->fw_name = myri10ge_fw_rss_aligned;
+ set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
else
- mgp->fw_name = myri10ge_fw_rss_unaligned;
+ set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
status = myri10ge_load_firmware(mgp, 0);
if (status != 0) {
dev_info(&pdev->dev, "Rss firmware not found\n");
+ if (old_allocated)
+ kfree(old_fw);
return;
}
@@ -3747,6 +3771,8 @@ static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
mgp->num_slices);
if (status == 0) {
pci_disable_msix(pdev);
+ if (old_allocated)
+ kfree(old_fw);
return;
}
if (status > 0)
@@ -3763,7 +3789,7 @@ disable_msix:
abort_with_fw:
mgp->num_slices = 1;
- mgp->fw_name = old_fw;
+ set_fw_name(mgp, old_fw, old_allocated);
myri10ge_load_firmware(mgp, 0);
}
@@ -3993,6 +4019,7 @@ abort_with_enabled:
pci_disable_device(pdev);
abort_with_netdev:
+ set_fw_name(mgp, NULL, false);
free_netdev(netdev);
return status;
}
@@ -4037,6 +4064,7 @@ static void myri10ge_remove(struct pci_dev *pdev)
dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
mgp->cmd, mgp->cmd_bus);
+ set_fw_name(mgp, NULL, false);
free_netdev(netdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 6e71346a755..ba854c70ab9 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -125,6 +125,8 @@ struct if_sdio_card {
const char *helper;
const char *firmware;
+ bool helper_allocated;
+ bool firmware_allocated;
u8 buffer[65536];
@@ -984,16 +986,34 @@ static int if_sdio_probe(struct sdio_func *func,
card->helper = if_sdio_models[i].helper;
card->firmware = if_sdio_models[i].firmware;
+ kparam_block_sysfs_write(helper_name);
if (lbs_helper_name) {
+ char *helper = kstrdup(lbs_helper_name, GFP_KERNEL);
+ if (!helper) {
+ kparam_unblock_sysfs_write(helper_name);
+ ret = -ENOMEM;
+ goto free;
+ }
lbs_deb_sdio("overriding helper firmware: %s\n",
lbs_helper_name);
- card->helper = lbs_helper_name;
+ card->helper = helper;
+ card->helper_allocated = true;
}
+ kparam_unblock_sysfs_write(helper_name);
+ kparam_block_sysfs_write(fw_name);
if (lbs_fw_name) {
+ char *fw_name = kstrdup(lbs_fw_name, GFP_KERNEL);
+ if (!fw_name) {
+ kparam_unblock_sysfs_write(fw_name);
+ ret = -ENOMEM;
+ goto free;
+ }
lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
- card->firmware = lbs_fw_name;
+ card->firmware = fw_name;
+ card->firmware_allocated = true;
}
+ kparam_unblock_sysfs_write(fw_name);
sdio_claim_host(func);
@@ -1127,6 +1147,10 @@ free:
kfree(packet);
}
+ if (card->helper_allocated)
+ kfree(card->helper);
+ if (card->firmware_allocated)
+ kfree(card->firmware);
kfree(card);
goto out;
@@ -1177,6 +1201,10 @@ static void if_sdio_remove(struct sdio_func *func)
kfree(packet);
}
+ if (card->helper_allocated)
+ kfree(card->helper);
+ if (card->firmware_allocated)
+ kfree(card->firmware);
kfree(card);
lbs_deb_leave(LBS_DEB_SDIO);
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 07ece9d26c6..3ff61063671 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -289,10 +289,13 @@ static int if_usb_probe(struct usb_interface *intf,
}
/* Upload firmware */
+ kparam_block_sysfs_write(fw_name);
if (__if_usb_prog_firmware(cardp, lbs_fw_name, BOOT_CMD_FW_BY_USB)) {
+ kparam_unblock_sysfs_write(fw_name);
lbs_deb_usbd(&udev->dev, "FW upload failed\n");
goto err_prog_firmware;
}
+ kparam_unblock_sysfs_write(fw_name);
if (!(priv = lbs_add_card(cardp, &udev->dev)))
goto err_prog_firmware;
diff --git a/drivers/net/wireless/libertas_tf/if_usb.c b/drivers/net/wireless/libertas_tf/if_usb.c
index b172f5d87a3..41a4f214ade 100644
--- a/drivers/net/wireless/libertas_tf/if_usb.c
+++ b/drivers/net/wireless/libertas_tf/if_usb.c
@@ -811,12 +811,15 @@ static int if_usb_prog_firmware(struct if_usb_card *cardp)
lbtf_deb_enter(LBTF_DEB_USB);
+ kparam_block_sysfs_write(fw_name);
ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
if (ret < 0) {
pr_err("request_firmware() failed with %#x\n", ret);
pr_err("firmware %s not found\n", lbtf_fw_name);
+ kparam_unblock_sysfs_write(fw_name);
goto done;
}
+ kparam_unblock_sysfs_write(fw_name);
if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
goto release_fw;
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index 915a29d6c7a..ca04cc9d332 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -788,6 +788,7 @@ bfad_drv_init(struct bfad_s *bfad)
memset(&driver_info, 0, sizeof(driver_info));
strncpy(driver_info.version, BFAD_DRIVER_VERSION,
sizeof(driver_info.version) - 1);
+ __kernel_param_lock();
if (host_name)
strncpy(driver_info.host_machine_name, host_name,
sizeof(driver_info.host_machine_name) - 1);
@@ -797,6 +798,7 @@ bfad_drv_init(struct bfad_s *bfad)
if (os_patch)
strncpy(driver_info.host_os_patch, os_patch,
sizeof(driver_info.host_os_patch) - 1);
+ __kernel_param_unlock();
strncpy(driver_info.os_device_name, bfad->pci_name,
sizeof(driver_info.os_device_name - 1));
diff --git a/drivers/staging/rtl8187se/r8180_core.c b/drivers/staging/rtl8187se/r8180_core.c
index 49ab9fa9ffa..ed7457bc24e 100644
--- a/drivers/staging/rtl8187se/r8180_core.c
+++ b/drivers/staging/rtl8187se/r8180_core.c
@@ -61,7 +61,7 @@ static struct pci_device_id rtl8180_pci_id_tbl[] __devinitdata = {
};
-static char *ifname = "wlan%d";
+static char ifname[IFNAMSIZ] = "wlan%d";
static int hwseqnum = 0;
static int hwwep = 0;
static int channels = 0x3fff;
@@ -72,7 +72,7 @@ MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
MODULE_DESCRIPTION("Linux driver for Realtek RTL8180 / RTL8185 WiFi cards");
-module_param(ifname, charp, S_IRUGO|S_IWUSR);
+module_param_string(ifname, ifname, sizeof(ifname), S_IRUGO|S_IWUSR);
module_param(hwseqnum, int, S_IRUGO|S_IWUSR);
module_param(hwwep, int, S_IRUGO|S_IWUSR);
module_param(channels, int, S_IRUGO|S_IWUSR);
@@ -3609,7 +3609,7 @@ static int __devinit rtl8180_pci_probe(struct pci_dev *pdev,
if (dev_alloc_name(dev, ifname) < 0) {
DMESG("Oops: devname already taken! Trying wlan%%d...\n");
- ifname = "wlan%d";
+ strcpy(ifname, "wlan%d");
dev_alloc_name(dev, ifname);
}
diff --git a/drivers/staging/rtl8192e/r8192E_core.c b/drivers/staging/rtl8192e/r8192E_core.c
index 4cd071adf84..17a806f9ee7 100644
--- a/drivers/staging/rtl8192e/r8192E_core.c
+++ b/drivers/staging/rtl8192e/r8192E_core.c
@@ -112,7 +112,7 @@ static const struct pci_device_id rtl8192_pci_id_tbl[] __devinitdata = {
{}
};
-static char* ifname = "wlan%d";
+static char ifname[IFNAMSIZ] = "wlan%d";
static int hwwep = 1; //default use hw. set 0 to use software security
static int channels = 0x3fff;
@@ -123,7 +123,7 @@ MODULE_DEVICE_TABLE(pci, rtl8192_pci_id_tbl);
MODULE_DESCRIPTION("Linux driver for Realtek RTL819x WiFi cards");
-module_param(ifname, charp, S_IRUGO|S_IWUSR );
+module_param_string(ifname, ifname, sizeof(ifname), S_IRUGO|S_IWUSR);
//module_param(hwseqnum,int, S_IRUGO|S_IWUSR);
module_param(hwwep,int, S_IRUGO|S_IWUSR);
module_param(channels,int, S_IRUGO|S_IWUSR);
@@ -6446,7 +6446,7 @@ static int __devinit rtl8192_pci_probe(struct pci_dev *pdev,
if (dev_alloc_name(dev, ifname) < 0){
RT_TRACE(COMP_INIT, "Oops: devname already taken! Trying wlan%%d...\n");
- ifname = "wlan%d";
+ strcpy(ifname, "wlan%d");
dev_alloc_name(dev, ifname);
}
diff --git a/drivers/staging/rtl8192su/r8192U_core.c b/drivers/staging/rtl8192su/r8192U_core.c
index 6970c97713d..df5b52baf89 100644
--- a/drivers/staging/rtl8192su/r8192U_core.c
+++ b/drivers/staging/rtl8192su/r8192U_core.c
@@ -144,13 +144,13 @@ MODULE_VERSION("V 1.1");
MODULE_DEVICE_TABLE(usb, rtl8192_usb_id_tbl);
MODULE_DESCRIPTION("Linux driver for Realtek RTL8192 USB WiFi cards");
-static char* ifname = "wlan%d";
+static char ifname[IFNAMSIZ] = "wlan%d";
static int hwwep = 1; //default use hw. set 0 to use software security
static int channels = 0x3fff;
-module_param(ifname, charp, S_IRUGO|S_IWUSR );
+module_param_string(ifname, ifname, sizeof(ifname), S_IRUGO|S_IWUSR);
//module_param(hwseqnum,int, S_IRUGO|S_IWUSR);
module_param(hwwep,int, S_IRUGO|S_IWUSR);
module_param(channels,int, S_IRUGO|S_IWUSR);
@@ -7406,7 +7406,7 @@ static int __devinit rtl8192_usb_probe(struct usb_interface *intf,
if (dev_alloc_name(dev, ifname) < 0){
RT_TRACE(COMP_INIT, "Oops: devname already taken! Trying wlan%%d...\n");
- ifname = "wlan%d";
+ strcpy(ifname, "wlan%d");
dev_alloc_name(dev, ifname);
}
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
index 5b3f555e01c..ea071a5b6ee 100644
--- a/drivers/usb/atm/ueagle-atm.c
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -1577,6 +1577,7 @@ static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver)
char file_arr[] = "CMVxy.bin";
char *file;
+ kparam_block_sysfs_write(cmv_file);
/* set proper name corresponding modem version and line type */
if (cmv_file[sc->modem_index] == NULL) {
if (UEA_CHIP_VERSION(sc) == ADI930)
@@ -1595,6 +1596,7 @@ static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver)
strlcat(cmv_name, file, UEA_FW_NAME_MAX);
if (ver == 2)
strlcat(cmv_name, ".v2", UEA_FW_NAME_MAX);
+ kparam_unblock_sysfs_write(cmv_file);
}
static int request_cmvs_old(struct uea_softc *sc,
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index 7b8839ebf3c..52ec0959d46 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -1977,8 +1977,7 @@ static void __devexit uvesafb_exit(void)
module_exit(uvesafb_exit);
-#define param_get_scroll NULL
-static int param_set_scroll(const char *val, struct kernel_param *kp)
+static int param_set_scroll(const char *val, const struct kernel_param *kp)
{
ypan = 0;
@@ -1993,7 +1992,9 @@ static int param_set_scroll(const char *val, struct kernel_param *kp)
return 0;
}
-
+static struct kernel_param_ops param_ops_scroll = {
+ .set = param_set_scroll,
+};
#define param_check_scroll(name, p) __param_check(name, p, void)
module_param_named(scroll, ypan, scroll, 0);
diff --git a/drivers/video/vt8623fb.c b/drivers/video/vt8623fb.c
index d31dc96f838..85d76ec4c63 100644
--- a/drivers/video/vt8623fb.c
+++ b/drivers/video/vt8623fb.c
@@ -726,7 +726,9 @@ static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_devi
/* Prepare startup mode */
+ kparam_block_sysfs_write(mode_option);
rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
+ kparam_unblock_sysfs_write(mode_option);
if (! ((rc == 1) || (rc == 2))) {
rc = -EINVAL;
dev_err(info->device, "mode %s not found\n", mode_option);
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 36dfdae9512..e17b49e2eab 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -45,7 +45,7 @@ unsigned short nfs_callback_tcpport;
unsigned short nfs_callback_tcpport6;
#define NFS_CALLBACK_MAXPORTNR (65535U)
-static int param_set_portnr(const char *val, struct kernel_param *kp)
+static int param_set_portnr(const char *val, const struct kernel_param *kp)
{
unsigned long num;
int ret;
@@ -58,11 +58,10 @@ static int param_set_portnr(const char *val, struct kernel_param *kp)
*((unsigned int *)kp->arg) = num;
return 0;
}
-
-static int param_get_portnr(char *buffer, struct kernel_param *kp)
-{
- return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_portnr = {
+ .set = param_set_portnr,
+ .get = param_get_uint,
+};
#define param_check_portnr(name, p) __param_check(name, p, unsigned int);
module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644);
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 82a9124f7d7..9d2f1837b3d 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -31,20 +31,23 @@ static const char __module_cat(name,__LINE__)[] \
struct kernel_param;
-/* Returns 0, or -errno. arg is in kp->arg. */
-typedef int (*param_set_fn)(const char *val, struct kernel_param *kp);
-/* Returns length written or -errno. Buffer is 4k (ie. be short!) */
-typedef int (*param_get_fn)(char *buffer, struct kernel_param *kp);
+struct kernel_param_ops {
+ /* Returns 0, or -errno. arg is in kp->arg. */
+ int (*set)(const char *val, const struct kernel_param *kp);
+ /* Returns length written or -errno. Buffer is 4k (ie. be short!) */
+ int (*get)(char *buffer, const struct kernel_param *kp);
+ /* Optional function to free kp->arg when module unloaded. */
+ void (*free)(void *arg);
+};
/* Flag bits for kernel_param.flags */
#define KPARAM_ISBOOL 2
struct kernel_param {
const char *name;
+ const struct kernel_param_ops *ops;
u16 perm;
u16 flags;
- param_set_fn set;
- param_get_fn get;
union {
void *arg;
const struct kparam_string *str;
@@ -63,12 +66,67 @@ struct kparam_array
{
unsigned int max;
unsigned int *num;
- param_set_fn set;
- param_get_fn get;
+ const struct kernel_param_ops *ops;
unsigned int elemsize;
void *elem;
};
+/**
+ * module_param - typesafe helper for a module/cmdline parameter
+ * @value: the variable to alter, and exposed parameter name.
+ * @type: the type of the parameter
+ * @perm: visibility in sysfs.
+ *
+ * @value becomes the module parameter, or (prefixed by KBUILD_MODNAME and a
+ * ".") the kernel commandline parameter. Note that - is changed to _, so
+ * the user can use "foo-bar=1" even for variable "foo_bar".
+ *
+ * @perm is 0 if the the variable is not to appear in sysfs, or 0444
+ * for world-readable, 0644 for root-writable, etc. Note that if it
+ * is writable, you may need to use kparam_block_sysfs_write() around
+ * accesses (esp. charp, which can be kfreed when it changes).
+ *
+ * The @type is simply pasted to refer to a param_ops_##type and a
+ * param_check_##type: for convenience many standard types are provided but
+ * you can create your own by defining those variables.
+ *
+ * Standard types are:
+ * byte, short, ushort, int, uint, long, ulong
+ * charp: a character pointer
+ * bool: a bool, values 0/1, y/n, Y/N.
+ * invbool: the above, only sense-reversed (N = true).
+ */
+#define module_param(name, type, perm) \
+ module_param_named(name, name, type, perm)
+
+/**
+ * module_param_named - typesafe helper for a renamed module/cmdline parameter
+ * @name: a valid C identifier which is the parameter name.
+ * @value: the actual lvalue to alter.
+ * @type: the type of the parameter
+ * @perm: visibility in sysfs.
+ *
+ * Usually it's a good idea to have variable names and user-exposed names the
+ * same, but that's harder if the variable must be non-static or is inside a
+ * structure. This allows exposure under a different name.
+ */
+#define module_param_named(name, value, type, perm) \
+ param_check_##type(name, &(value)); \
+ module_param_cb(name, &param_ops_##type, &value, perm); \
+ __MODULE_PARM_TYPE(name, #type)
+
+/**
+ * module_param_cb - general callback for a module/cmdline parameter
+ * @name: a valid C identifier which is the parameter name.
+ * @ops: the set & get operations for this parameter.
+ * @perm: visibility in sysfs.
+ *
+ * The ops can have NULL set or get functions.
+ */
+#define module_param_cb(name, ops, arg, perm) \
+ __module_param_call(MODULE_PARAM_PREFIX, \
+ name, ops, arg, __same_type((arg), bool *), perm)
+
/* On alpha, ia64 and ppc64 relocations to global data cannot go into
read-only sections (which is part of respective UNIX ABI on these
platforms). So 'const' makes no sense and even causes compile failures
@@ -80,10 +138,8 @@ struct kparam_array
#endif
/* This is the fundamental function for registering boot/module
- parameters. perm sets the visibility in sysfs: 000 means it's
- not there, read bits mean it's readable, write bits mean it's
- writable. */
-#define __module_param_call(prefix, name, set, get, arg, isbool, perm) \
+ parameters. */
+#define __module_param_call(prefix, name, ops, arg, isbool, perm) \
/* Default value instead of permissions? */ \
static int __param_perm_check_##name __attribute__((unused)) = \
BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2)) \
@@ -92,31 +148,87 @@ struct kparam_array
static struct kernel_param __moduleparam_const __param_##name \
__used \
__attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \
- = { __param_str_##name, perm, isbool ? KPARAM_ISBOOL : 0, \
- set, get, { arg } }
+ = { __param_str_##name, ops, perm, isbool ? KPARAM_ISBOOL : 0, \
+ { arg } }
+
+/* Obsolete - use module_param_cb() */
+#define module_param_call(name, set, get, arg, perm) \
+ static struct kernel_param_ops __param_ops_##name = \
+ { (void *)set, (void *)get }; \
+ __module_param_call(MODULE_PARAM_PREFIX, \
+ name, &__param_ops_##name, arg, \
+ __same_type(arg, bool *), \
+ (perm) + sizeof(__check_old_set_param(set))*0)
+
+/* We don't get oldget: it's often a new-style param_get_uint, etc. */
+static inline int
+__check_old_set_param(int (*oldset)(const char *, struct kernel_param *))
+{
+ return 0;
+}
-#define module_param_call(name, set, get, arg, perm) \
- __module_param_call(MODULE_PARAM_PREFIX, \
- name, set, get, arg, \
- __same_type(*(arg), bool), perm)
+/**
+ * kparam_block_sysfs_write - make sure a parameter isn't written via sysfs.
+ * @name: the name of the parameter
+ *
+ * There's no point blocking write on a paramter that isn't writable via sysfs!
+ */
+#define kparam_block_sysfs_write(name) \
+ do { \
+ BUG_ON(!(__param_##name.perm & 0222)); \
+ __kernel_param_lock(); \
+ } while (0)
-/* Helper functions: type is byte, short, ushort, int, uint, long,
- ulong, charp, bool or invbool, or XXX if you define param_get_XXX,
- param_set_XXX and param_check_XXX. */
-#define module_param_named(name, value, type, perm) \
- param_check_##type(name, &(value)); \
- module_param_call(name, param_set_##type, param_get_##type, &value, perm); \
- __MODULE_PARM_TYPE(name, #type)
+/**
+ * kparam_unblock_sysfs_write - allows sysfs to write to a parameter again.
+ * @name: the name of the parameter
+ */
+#define kparam_unblock_sysfs_write(name) \
+ do { \
+ BUG_ON(!(__param_##name.perm & 0222)); \
+ __kernel_param_unlock(); \
+ } while (0)
-#define module_param(name, type, perm) \
- module_param_named(name, name, type, perm)
+/**
+ * kparam_block_sysfs_read - make sure a parameter isn't read via sysfs.
+ * @name: the name of the parameter
+ *
+ * This also blocks sysfs writes.
+ */
+#define kparam_block_sysfs_read(name) \
+ do { \
+ BUG_ON(!(__param_##name.perm & 0444)); \
+ __kernel_param_lock(); \
+ } while (0)
+
+/**
+ * kparam_unblock_sysfs_read - allows sysfs to read a parameter again.
+ * @name: the name of the parameter
+ */
+#define kparam_unblock_sysfs_read(name) \
+ do { \
+ BUG_ON(!(__param_##name.perm & 0444)); \
+ __kernel_param_unlock(); \
+ } while (0)
+
+#ifdef CONFIG_SYSFS
+extern void __kernel_param_lock(void);
+extern void __kernel_param_unlock(void);
+#else
+static inline void __kernel_param_lock(void)
+{
+}
+static inline void __kernel_param_unlock(void)
+{
+}
+#endif
#ifndef MODULE
/**
* core_param - define a historical core kernel parameter.
* @name: the name of the cmdline and sysfs parameter (often the same as var)
* @var: the variable
- * @type: the type (for param_set_##type and param_get_##type)
+ * @type: the type of the parameter
* @perm: visibility in sysfs
*
* core_param is just like module_param(), but cannot be modular and
@@ -126,23 +238,32 @@ struct kparam_array
*/
#define core_param(name, var, type, perm) \
param_check_##type(name, &(var)); \
- __module_param_call("", name, param_set_##type, param_get_##type, \
+ __module_param_call("", name, &param_ops_##type, \
&var, __same_type(var, bool), perm)
#endif /* !MODULE */
-/* Actually copy string: maxlen param is usually sizeof(string). */
+/**
+ * module_param_string - a char array parameter
+ * @name: the name of the parameter
+ * @string: the string variable
+ * @len: the maximum length of the string, incl. terminator
+ * @perm: visibility in sysfs.
+ *
+ * This actually copies the string when it's set (unlike type charp).
+ * @len is usually just sizeof(string).
+ */
#define module_param_string(name, string, len, perm) \
static const struct kparam_string __param_string_##name \
= { len, string }; \
__module_param_call(MODULE_PARAM_PREFIX, name, \
- param_set_copystring, param_get_string, \
+ &param_ops_string, \
.str = &__param_string_##name, 0, perm); \
__MODULE_PARM_TYPE(name, "string")
/* Called on module insert or kernel boot */
extern int parse_args(const char *name,
char *args,
- struct kernel_param *params,
+ const struct kernel_param *params,
unsigned num,
int (*unknown)(char *param, char *val));
@@ -162,72 +283,105 @@ static inline void destroy_params(const struct kernel_param *params,
#define __param_check(name, p, type) \
static inline type *__check_##name(void) { return(p); }
-extern int param_set_byte(const char *val, struct kernel_param *kp);
-extern int param_get_byte(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_byte;
+extern int param_set_byte(const char *val, const struct kernel_param *kp);
+extern int param_get_byte(char *buffer, const struct kernel_param *kp);
#define param_check_byte(name, p) __param_check(name, p, unsigned char)
-extern int param_set_short(const char *val, struct kernel_param *kp);
-extern int param_get_short(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_short;
+extern int param_set_short(const char *val, const struct kernel_param *kp);
+extern int param_get_short(char *buffer, const struct kernel_param *kp);
#define param_check_short(name, p) __param_check(name, p, short)
-extern int param_set_ushort(const char *val, struct kernel_param *kp);
-extern int param_get_ushort(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_ushort;
+extern int param_set_ushort(const char *val, const struct kernel_param *kp);
+extern int param_get_ushort(char *buffer, const struct kernel_param *kp);
#define param_check_ushort(name, p) __param_check(name, p, unsigned short)
-extern int param_set_int(const char *val, struct kernel_param *kp);
-extern int param_get_int(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_int;
+extern int param_set_int(const char *val, const struct kernel_param *kp);
+extern int param_get_int(char *buffer, const struct kernel_param *kp);
#define param_check_int(name, p) __param_check(name, p, int)
-extern int param_set_uint(const char *val, struct kernel_param *kp);
-extern int param_get_uint(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_uint;
+extern int param_set_uint(const char *val, const struct kernel_param *kp);
+extern int param_get_uint(char *buffer, const struct kernel_param *kp);
#define param_check_uint(name, p) __param_check(name, p, unsigned int)
-extern int param_set_long(const char *val, struct kernel_param *kp);
-extern int param_get_long(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_long;
+extern int param_set_long(const char *val, const struct kernel_param *kp);
+extern int param_get_long(char *buffer, const struct kernel_param *kp);
#define param_check_long(name, p) __param_check(name, p, long)
-extern int param_set_ulong(const char *val, struct kernel_param *kp);
-extern int param_get_ulong(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_ulong;
+extern int param_set_ulong(const char *val, const struct kernel_param *kp);
+extern int param_get_ulong(char *buffer, const struct kernel_param *kp);
#define param_check_ulong(name, p) __param_check(name, p, unsigned long)
-extern int param_set_charp(const char *val, struct kernel_param *kp);
-extern int param_get_charp(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_charp;
+extern int param_set_charp(const char *val, const struct kernel_param *kp);
+extern int param_get_charp(char *buffer, const struct kernel_param *kp);
#define param_check_charp(name, p) __param_check(name, p, char *)
/* For historical reasons "bool" parameters can be (unsigned) "int". */
-extern int param_set_bool(const char *val, struct kernel_param *kp);
-extern int param_get_bool(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_bool;
+extern int param_set_bool(const char *val, const struct kernel_param *kp);
+extern int param_get_bool(char *buffer, const struct kernel_param *kp);
#define param_check_bool(name, p) \
static inline void __check_##name(void) \
{ \
- BUILD_BUG_ON(!__same_type(*(p), bool) && \
- !__same_type(*(p), unsigned int) && \
- !__same_type(*(p), int)); \
+ BUILD_BUG_ON(!__same_type((p), bool *) && \
+ !__same_type((p), unsigned int *) && \
+ !__same_type((p), int *)); \
}
-extern int param_set_invbool(const char *val, struct kernel_param *kp);
-extern int param_get_invbool(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_invbool;
+extern int param_set_invbool(const char *val, const struct kernel_param *kp);
+extern int param_get_invbool(char *buffer, const struct kernel_param *kp);
#define param_check_invbool(name, p) __param_check(name, p, bool)
-/* Comma-separated array: *nump is set to number they actually specified. */
+/**
+ * module_param_array - a parameter which is an array of some type
+ * @name: the name of the array variable
+ * @type: the type, as per module_param()
+ * @nump: optional pointer filled in with the number written
+ * @perm: visibility in sysfs
+ *
+ * Input and output are as comma-separated values. Commas inside values
+ * don't work properly (eg. an array of charp).
+ *
+ * ARRAY_SIZE(@name) is used to determine the number of elements in the
+ * array, so the definition must be visible.
+ */
+#define module_param_array(name, type, nump, perm) \
+ module_param_array_named(name, name, type, nump, perm)
+
+/**
+ * module_param_array_named - renamed parameter which is an array of some type
+ * @name: a valid C identifier which is the parameter name
+ * @array: the name of the array variable
+ * @type: the type, as per module_param()
+ * @nump: optional pointer filled in with the number written
+ * @perm: visibility in sysfs
+ *
+ * This exposes a different name than the actual variable name. See
+ * module_param_named() for why this might be necessary.
+ */
#define module_param_array_named(name, array, type, nump, perm) \
static const struct kparam_array __param_arr_##name \
- = { ARRAY_SIZE(array), nump, param_set_##type, param_get_##type,\
+ = { ARRAY_SIZE(array), nump, &param_ops_##type, \
sizeof(array[0]), array }; \
__module_param_call(MODULE_PARAM_PREFIX, name, \
- param_array_set, param_array_get, \
+ &param_array_ops, \
.arr = &__param_arr_##name, \
__same_type(array[0], bool), perm); \
__MODULE_PARM_TYPE(name, "array of " #type)
-#define module_param_array(name, type, nump, perm) \
- module_param_array_named(name, name, type, nump, perm)
-
-extern int param_array_set(const char *val, struct kernel_param *kp);
-extern int param_array_get(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_array_ops;
-extern int param_set_copystring(const char *val, struct kernel_param *kp);
-extern int param_get_string(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_string;
+extern int param_set_copystring(const char *val, const struct kernel_param *);
+extern int param_get_string(char *buffer, const struct kernel_param *kp);
/* for exporting parameters in /sys/parameters */
@@ -235,13 +389,13 @@ struct module;
#if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
extern int module_param_sysfs_setup(struct module *mod,
- struct kernel_param *kparam,
+ const struct kernel_param *kparam,
unsigned int num_params);
extern void module_param_sysfs_remove(struct module *mod);
#else
static inline int module_param_sysfs_setup(struct module *mod,
- struct kernel_param *kparam,
+ const struct kernel_param *kparam,
unsigned int num_params)
{
return 0;
diff --git a/init/main.c b/init/main.c
index 86cbfd085b0..22d61cb06f9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -201,11 +201,11 @@ static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
static const char *panic_later, *panic_param;
-extern struct obs_kernel_param __setup_start[], __setup_end[];
+extern const struct obs_kernel_param __setup_start[], __setup_end[];
static int __init obsolete_checksetup(char *line)
{
- struct obs_kernel_param *p;
+ const struct obs_kernel_param *p;
int had_early_param = 0;
p = __setup_start;
@@ -458,7 +458,7 @@ static noinline void __init_refok rest_init(void)
/* Check for early params. */
static int __init do_early_param(char *param, char *val)
{
- struct obs_kernel_param *p;
+ const struct obs_kernel_param *p;
for (p = __setup_start; p < __setup_end; p++) {
if ((p->early && strcmp(param, p->str) == 0) ||
@@ -536,7 +536,7 @@ static void __init mm_init(void)
asmlinkage void __init start_kernel(void)
{
char * command_line;
- extern struct kernel_param __start___param[], __stop___param[];
+ extern const struct kernel_param __start___param[], __stop___param[];
smp_setup_processor_id();
diff --git a/kernel/params.c b/kernel/params.c
index 0b30ecd53a5..08107d18175 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -31,6 +31,42 @@
#define DEBUGP(fmt, a...)
#endif
+/* Protects all parameters, and incidentally kmalloced_param list. */
+static DEFINE_MUTEX(param_lock);
+
+/* This just allows us to keep track of which parameters are kmalloced. */
+struct kmalloced_param {
+ struct list_head list;
+ char val[];
+};
+static LIST_HEAD(kmalloced_params);
+
+static void *kmalloc_parameter(unsigned int size)
+{
+ struct kmalloced_param *p;
+
+ p = kmalloc(sizeof(*p) + size, GFP_KERNEL);
+ if (!p)
+ return NULL;
+
+ list_add(&p->list, &kmalloced_params);
+ return p->val;
+}
+
+/* Does nothing if parameter wasn't kmalloced above. */
+static void maybe_kfree_parameter(void *param)
+{
+ struct kmalloced_param *p;
+
+ list_for_each_entry(p, &kmalloced_params, list) {
+ if (p->val == param) {
+ list_del(&p->list);
+ kfree(p);
+ break;
+ }
+ }
+}
+
static inline char dash2underscore(char c)
{
if (c == '-')
@@ -49,18 +85,25 @@ static inline int parameq(const char *input, const char *paramname)
static int parse_one(char *param,
char *val,
- struct kernel_param *params,
+ const struct kernel_param *params,
unsigned num_params,
int (*handle_unknown)(char *param, char *val))
{
unsigned int i;
+ int err;
/* Find parameter */
for (i = 0; i < num_params; i++) {
if (parameq(param, params[i].name)) {
+ /* Noone handled NULL, so do it here. */
+ if (!val && params[i].ops->set != param_set_bool)
+ return -EINVAL;
DEBUGP("They are equal! Calling %p\n",
- params[i].set);
- return params[i].set(val, &params[i]);
+ params[i].ops->set);
+ mutex_lock(&param_lock);
+ err = params[i].ops->set(val, &params[i]);
+ mutex_unlock(&param_lock);
+ return err;
}
}
@@ -128,7 +171,7 @@ static char *next_arg(char *args, char **param, char **val)
/* Args looks like "foo=bar,bar2 baz=fuz wiz". */
int parse_args(const char *name,
char *args,
- struct kernel_param *params,
+ const struct kernel_param *params,
unsigned num,
int (*unknown)(char *param, char *val))
{
@@ -176,22 +219,29 @@ int parse_args(const char *name,
/* Lazy bastard, eh? */
#define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \
- int param_set_##name(const char *val, struct kernel_param *kp) \
+ int param_set_##name(const char *val, const struct kernel_param *kp) \
{ \
tmptype l; \
int ret; \
\
- if (!val) return -EINVAL; \
ret = strtolfn(val, 0, &l); \
if (ret == -EINVAL || ((type)l != l)) \
return -EINVAL; \
*((type *)kp->arg) = l; \
return 0; \
} \
- int param_get_##name(char *buffer, struct kernel_param *kp) \
+ int param_get_##name(char *buffer, const struct kernel_param *kp) \
{ \
return sprintf(buffer, format, *((type *)kp->arg)); \
- }
+ } \
+ struct kernel_param_ops param_ops_##name = { \
+ .set = param_set_##name, \
+ .get = param_get_##name, \
+ }; \
+ EXPORT_SYMBOL(param_set_##name); \
+ EXPORT_SYMBOL(param_get_##name); \
+ EXPORT_SYMBOL(param_ops_##name)
+
STANDARD_PARAM_DEF(byte, unsigned char, "%c", unsigned long, strict_strtoul);
STANDARD_PARAM_DEF(short, short, "%hi", long, strict_strtol);
@@ -201,39 +251,50 @@ STANDARD_PARAM_DEF(uint, unsigned int, "%u", unsigned long, strict_strtoul);
STANDARD_PARAM_DEF(long, long, "%li", long, strict_strtol);
STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, strict_strtoul);
-int param_set_charp(const char *val, struct kernel_param *kp)
+int param_set_charp(const char *val, const struct kernel_param *kp)
{
- if (!val) {
- printk(KERN_ERR "%s: string parameter expected\n",
- kp->name);
- return -EINVAL;
- }
-
if (strlen(val) > 1024) {
printk(KERN_ERR "%s: string parameter too long\n",
kp->name);
return -ENOSPC;
}
- /* This is a hack. We can't need to strdup in early boot, and we
+ maybe_kfree_parameter(*(char **)kp->arg);
+
+ /* This is a hack. We can't kmalloc in early boot, and we
* don't need to; this mangled commandline is preserved. */
if (slab_is_available()) {
- *(char **)kp->arg = kstrdup(val, GFP_KERNEL);
+ *(char **)kp->arg = kmalloc_parameter(strlen(val)+1);
if (!*(char **)kp->arg)
return -ENOMEM;
+ strcpy(*(char **)kp->arg, val);
} else
*(const char **)kp->arg = val;
return 0;
}
+EXPORT_SYMBOL(param_set_charp);
-int param_get_charp(char *buffer, struct kernel_param *kp)
+int param_get_charp(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%s", *((char **)kp->arg));
}
+EXPORT_SYMBOL(param_get_charp);
+
+static void param_free_charp(void *arg)
+{
+ maybe_kfree_parameter(*((char **)arg));
+}
+
+struct kernel_param_ops param_ops_charp = {
+ .set = param_set_charp,
+ .get = param_get_charp,
+ .free = param_free_charp,
+};
+EXPORT_SYMBOL(param_ops_charp);
/* Actually could be a bool or an int, for historical reasons. */
-int param_set_bool(const char *val, struct kernel_param *kp)
+int param_set_bool(const char *val, const struct kernel_param *kp)
{
bool v;
@@ -258,8 +319,9 @@ int param_set_bool(const char *val, struct kernel_param *kp)
*(int *)kp->arg = v;
return 0;
}
+EXPORT_SYMBOL(param_set_bool);
-int param_get_bool(char *buffer, struct kernel_param *kp)
+int param_get_bool(char *buffer, const struct kernel_param *kp)
{
bool val;
if (kp->flags & KPARAM_ISBOOL)
@@ -270,9 +332,16 @@ int param_get_bool(char *buffer, struct kernel_param *kp)
/* Y and N chosen as being relatively non-coder friendly */
return sprintf(buffer, "%c", val ? 'Y' : 'N');
}
+EXPORT_SYMBOL(param_get_bool);
+
+struct kernel_param_ops param_ops_bool = {
+ .set = param_set_bool,
+ .get = param_get_bool,
+};
+EXPORT_SYMBOL(param_ops_bool);
/* This one must be bool. */
-int param_set_invbool(const char *val, struct kernel_param *kp)
+int param_set_invbool(const char *val, const struct kernel_param *kp)
{
int ret;
bool boolval;
@@ -285,18 +354,26 @@ int param_set_invbool(const char *val, struct kernel_param *kp)
*(bool *)kp->arg = !boolval;
return ret;
}
+EXPORT_SYMBOL(param_set_invbool);
-int param_get_invbool(char *buffer, struct kernel_param *kp)
+int param_get_invbool(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%c", (*(bool *)kp->arg) ? 'N' : 'Y');
}
+EXPORT_SYMBOL(param_get_invbool);
+
+struct kernel_param_ops param_ops_invbool = {
+ .set = param_set_invbool,
+ .get = param_get_invbool,
+};
+EXPORT_SYMBOL(param_ops_invbool);
/* We break the rule and mangle the string. */
static int param_array(const char *name,
const char *val,
unsigned int min, unsigned int max,
void *elem, int elemsize,
- int (*set)(const char *, struct kernel_param *kp),
+ int (*set)(const char *, const struct kernel_param *kp),
u16 flags,
unsigned int *num)
{
@@ -309,12 +386,6 @@ static int param_array(const char *name,
kp.arg = elem;
kp.flags = flags;
- /* No equals sign? */
- if (!val) {
- printk(KERN_ERR "%s: expects arguments\n", name);
- return -EINVAL;
- }
-
*num = 0;
/* We expect a comma-separated list of values. */
do {
@@ -330,6 +401,7 @@ static int param_array(const char *name,
/* nul-terminate and parse */
save = val[len];
((char *)val)[len] = '\0';
+ BUG_ON(!mutex_is_locked(&param_lock));
ret = set(val, &kp);
if (ret != 0)
@@ -347,17 +419,17 @@ static int param_array(const char *name,
return 0;
}
-int param_array_set(const char *val, struct kernel_param *kp)
+static int param_array_set(const char *val, const struct kernel_param *kp)
{
const struct kparam_array *arr = kp->arr;
unsigned int temp_num;
return param_array(kp->name, val, 1, arr->max, arr->elem,
- arr->elemsize, arr->set, kp->flags,
+ arr->elemsize, arr->ops->set, kp->flags,
arr->num ?: &temp_num);
}
-int param_array_get(char *buffer, struct kernel_param *kp)
+static int param_array_get(char *buffer, const struct kernel_param *kp)
{
int i, off, ret;
const struct kparam_array *arr = kp->arr;
@@ -368,7 +440,8 @@ int param_array_get(char *buffer, struct kernel_param *kp)
if (i)
buffer[off++] = ',';
p.arg = arr->elem + arr->elemsize * i;
- ret = arr->get(buffer + off, &p);
+ BUG_ON(!mutex_is_locked(&param_lock));
+ ret = arr->ops->get(buffer + off, &p);
if (ret < 0)
return ret;
off += ret;
@@ -377,14 +450,27 @@ int param_array_get(char *buffer, struct kernel_param *kp)
return off;
}
-int param_set_copystring(const char *val, struct kernel_param *kp)
+static void param_array_free(void *arg)
+{
+ unsigned int i;
+ const struct kparam_array *arr = arg;
+
+ if (arr->ops->free)
+ for (i = 0; i < (arr->num ? *arr->num : arr->max); i++)
+ arr->ops->free(arr->elem + arr->elemsize * i);
+}
+
+struct kernel_param_ops param_array_ops = {
+ .set = param_array_set,
+ .get = param_array_get,
+ .free = param_array_free,
+};
+EXPORT_SYMBOL(param_array_ops);
+
+int param_set_copystring(const char *val, const struct kernel_param *kp)
{
const struct kparam_string *kps = kp->str;
- if (!val) {
- printk(KERN_ERR "%s: missing param set value\n", kp->name);
- return -EINVAL;
- }
if (strlen(val)+1 > kps->maxlen) {
printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
kp->name, kps->maxlen-1);
@@ -393,12 +479,20 @@ int param_set_copystring(const char *val, struct kernel_param *kp)
strcpy(kps->string, val);
return 0;
}
+EXPORT_SYMBOL(param_set_copystring);
-int param_get_string(char *buffer, struct kernel_param *kp)
+int param_get_string(char *buffer, const struct kernel_param *kp)
{
const struct kparam_string *kps = kp->str;
return strlcpy(buffer, kps->string, kps->maxlen);
}
+EXPORT_SYMBOL(param_get_string);
+
+struct kernel_param_ops param_ops_string = {
+ .set = param_set_copystring,
+ .get = param_get_string,
+};
+EXPORT_SYMBOL(param_ops_string);
/* sysfs output in /sys/modules/XYZ/parameters/ */
#define to_module_attr(n) container_of(n, struct module_attribute, attr)
@@ -409,7 +503,7 @@ extern struct kernel_param __start___param[], __stop___param[];
struct param_attribute
{
struct module_attribute mattr;
- struct kernel_param *param;
+ const struct kernel_param *param;
};
struct module_param_attrs
@@ -428,10 +522,12 @@ static ssize_t param_attr_show(struct module_attribute *mattr,
int count;
struct param_attribute *attribute = to_param_attr(mattr);
- if (!attribute->param->get)
+ if (!attribute->param->ops->get)
return -EPERM;
- count = attribute->param->get(buf, attribute->param);
+ mutex_lock(&param_lock);
+ count = attribute->param->ops->get(buf, attribute->param);
+ mutex_unlock(&param_lock);
if (count > 0) {
strcat(buf, "\n");
++count;
@@ -447,10 +543,12 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
int err;
struct param_attribute *attribute = to_param_attr(mattr);
- if (!attribute->param->set)
+ if (!attribute->param->ops->set)
return -EPERM;
- err = attribute->param->set(buf, attribute->param);
+ mutex_lock(&param_lock);
+ err = attribute->param->ops->set(buf, attribute->param);
+ mutex_unlock(&param_lock);
if (!err)
return len;
return err;
@@ -464,6 +562,18 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
#endif
#ifdef CONFIG_SYSFS
+void __kernel_param_lock(void)
+{
+ mutex_lock(&param_lock);
+}
+EXPORT_SYMBOL(__kernel_param_lock);
+
+void __kernel_param_unlock(void)
+{
+ mutex_unlock(&param_lock);
+}
+EXPORT_SYMBOL(__kernel_param_unlock);
+
/*
* add_sysfs_param - add a parameter to sysfs
* @mk: struct module_kobject
@@ -475,7 +585,7 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
* if there's an error.
*/
static __modinit int add_sysfs_param(struct module_kobject *mk,
- struct kernel_param *kp,
+ const struct kernel_param *kp,
const char *name)
{
struct module_param_attrs *new;
@@ -557,7 +667,7 @@ static void free_module_param_attrs(struct module_kobject *mk)
* /sys/module/[mod->name]/parameters/
*/
int module_param_sysfs_setup(struct module *mod,
- struct kernel_param *kparam,
+ const struct kernel_param *kparam,
unsigned int num_params)
{
int i, err;
@@ -602,7 +712,11 @@ void module_param_sysfs_remove(struct module *mod)
void destroy_params(const struct kernel_param *params, unsigned num)
{
- /* FIXME: This should free kmalloced charp parameters. It doesn't. */
+ unsigned int i;
+
+ for (i = 0; i < num; i++)
+ if (params[i].ops->free)
+ params[i].ops->free(params[i].arg);
}
static void __init kernel_add_sysfs_param(const char *name,
@@ -768,28 +882,3 @@ static int __init param_sysfs_init(void)
subsys_initcall(param_sysfs_init);
#endif /* CONFIG_SYSFS */
-
-EXPORT_SYMBOL(param_set_byte);
-EXPORT_SYMBOL(param_get_byte);
-EXPORT_SYMBOL(param_set_short);
-EXPORT_SYMBOL(param_get_short);
-EXPORT_SYMBOL(param_set_ushort);
-EXPORT_SYMBOL(param_get_ushort);
-EXPORT_SYMBOL(param_set_int);
-EXPORT_SYMBOL(param_get_int);
-EXPORT_SYMBOL(param_set_uint);
-EXPORT_SYMBOL(param_get_uint);
-EXPORT_SYMBOL(param_set_long);
-EXPORT_SYMBOL(param_get_long);
-EXPORT_SYMBOL(param_set_ulong);
-EXPORT_SYMBOL(param_get_ulong);
-EXPORT_SYMBOL(param_set_charp);
-EXPORT_SYMBOL(param_get_charp);
-EXPORT_SYMBOL(param_set_bool);
-EXPORT_SYMBOL(param_get_bool);
-EXPORT_SYMBOL(param_set_invbool);
-EXPORT_SYMBOL(param_get_invbool);
-EXPORT_SYMBOL(param_array_set);
-EXPORT_SYMBOL(param_array_get);
-EXPORT_SYMBOL(param_set_copystring);
-EXPORT_SYMBOL(param_get_string);
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 6d0bd198af1..be04d46110f 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -103,6 +103,7 @@ ieee80211_rate_control_ops_get(const char *name)
struct rate_control_ops *ops;
const char *alg_name;
+ kparam_block_sysfs_write(ieee80211_default_rc_algo);
if (!name)
alg_name = ieee80211_default_rc_algo;
else
@@ -120,6 +121,7 @@ ieee80211_rate_control_ops_get(const char *name)
/* try built-in one if specific alg requested but not found */
if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT))
ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
+ kparam_unblock_sysfs_write(ieee80211_default_rc_algo);
return ops;
}
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 880d0de3f50..36cb66022a2 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -39,7 +39,7 @@ static LIST_HEAD(cred_unused);
static unsigned long number_cred_unused;
#define MAX_HASHTABLE_BITS (10)
-static int param_set_hashtbl_sz(const char *val, struct kernel_param *kp)
+static int param_set_hashtbl_sz(const char *val, const struct kernel_param *kp)
{
unsigned long num;
unsigned int nbits;
@@ -61,7 +61,7 @@ out_inval:
return -EINVAL;
}
-static int param_get_hashtbl_sz(char *buffer, struct kernel_param *kp)
+static int param_get_hashtbl_sz(char *buffer, const struct kernel_param *kp)
{
unsigned int nbits;
@@ -71,6 +71,11 @@ static int param_get_hashtbl_sz(char *buffer, struct kernel_param *kp)
#define param_check_hashtbl_sz(name, p) __param_check(name, p, unsigned int);
+static struct kernel_param_ops param_ops_hashtbl_sz = {
+ .set = param_set_hashtbl_sz,
+ .get = param_get_hashtbl_sz,
+};
+
module_param_named(auth_hashtable_size, auth_hashbits, hashtbl_sz, 0644);
MODULE_PARM_DESC(auth_hashtable_size, "RPC credential cache hashtable size");
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 7ca65c7005e..49a62f0c4b8 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2577,7 +2577,8 @@ void cleanup_socket_xprt(void)
xprt_unregister_transport(&xs_bc_tcp_transport);
}
-static int param_set_uint_minmax(const char *val, struct kernel_param *kp,
+static int param_set_uint_minmax(const char *val,
+ const struct kernel_param *kp,
unsigned int min, unsigned int max)
{
unsigned long num;
@@ -2592,34 +2593,37 @@ static int param_set_uint_minmax(const char *val, struct kernel_param *kp,
return 0;
}
-static int param_set_portnr(const char *val, struct kernel_param *kp)
+static int param_set_portnr(const char *val, const struct kernel_param *kp)
{
return param_set_uint_minmax(val, kp,
RPC_MIN_RESVPORT,
RPC_MAX_RESVPORT);
}
-static int param_get_portnr(char *buffer, struct kernel_param *kp)
-{
- return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_portnr = {
+ .set = param_set_portnr,
+ .get = param_get_uint,
+};
+
#define param_check_portnr(name, p) \
__param_check(name, p, unsigned int);
module_param_named(min_resvport, xprt_min_resvport, portnr, 0644);
module_param_named(max_resvport, xprt_max_resvport, portnr, 0644);
-static int param_set_slot_table_size(const char *val, struct kernel_param *kp)
+static int param_set_slot_table_size(const char *val,
+ const struct kernel_param *kp)
{
return param_set_uint_minmax(val, kp,
RPC_MIN_SLOT_TABLE,
RPC_MAX_SLOT_TABLE);
}
-static int param_get_slot_table_size(char *buffer, struct kernel_param *kp)
-{
- return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_slot_table_size = {
+ .set = param_set_slot_table_size,
+ .get = param_get_uint,
+};
+
#define param_check_slot_table_size(name, p) \
__param_check(name, p, unsigned int);
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 253c107b9a9..1ec7158b6c1 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1035,6 +1035,13 @@ static const struct sectioncheck *section_mismatch(
* fromsec = .data*
* atsym =__param*
*
+ * Pattern 1a:
+ * module_param_call() ops can refer to __init set function if permissions=0
+ * The pattern is identified by:
+ * tosec = .init.text
+ * fromsec = .data*
+ * atsym = __param_ops_*
+ *
* Pattern 2:
* Many drivers utilise a *driver container with references to
* add, remove, probe functions etc.
@@ -1069,6 +1076,12 @@ static int secref_whitelist(const struct sectioncheck *mismatch,
(strncmp(fromsym, "__param", strlen("__param")) == 0))
return 0;
+ /* Check for pattern 1a */
+ if (strcmp(tosec, ".init.text") == 0 &&
+ match(fromsec, data_sections) &&
+ (strncmp(fromsym, "__param_ops_", strlen("__param_ops_")) == 0))
+ return 0;
+
/* Check for pattern 2 */
if (match(tosec, init_exit_sections) &&
match(fromsec, data_sections) &&
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index 8db33a8b50c..d5666d3cc21 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -667,17 +667,29 @@ static struct security_operations apparmor_ops = {
* AppArmor sysfs module parameters
*/
-static int param_set_aabool(const char *val, struct kernel_param *kp);
-static int param_get_aabool(char *buffer, struct kernel_param *kp);
+static int param_set_aabool(const char *val, const struct kernel_param *kp);
+static int param_get_aabool(char *buffer, const struct kernel_param *kp);
#define param_check_aabool(name, p) __param_check(name, p, int)
+static struct kernel_param_ops param_ops_aabool = {
+ .set = param_set_aabool,
+ .get = param_get_aabool
+};
-static int param_set_aauint(const char *val, struct kernel_param *kp);
-static int param_get_aauint(char *buffer, struct kernel_param *kp);
+static int param_set_aauint(const char *val, const struct kernel_param *kp);
+static int param_get_aauint(char *buffer, const struct kernel_param *kp);
#define param_check_aauint(name, p) __param_check(name, p, int)
+static struct kernel_param_ops param_ops_aauint = {
+ .set = param_set_aauint,
+ .get = param_get_aauint
+};
-static int param_set_aalockpolicy(const char *val, struct kernel_param *kp);
-static int param_get_aalockpolicy(char *buffer, struct kernel_param *kp);
+static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp);
+static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp);
#define param_check_aalockpolicy(name, p) __param_check(name, p, int)
+static struct kernel_param_ops param_ops_aalockpolicy = {
+ .set = param_set_aalockpolicy,
+ .get = param_get_aalockpolicy
+};
static int param_set_audit(const char *val, struct kernel_param *kp);
static int param_get_audit(char *buffer, struct kernel_param *kp);
@@ -751,7 +763,7 @@ static int __init apparmor_enabled_setup(char *str)
__setup("apparmor=", apparmor_enabled_setup);
/* set global flag turning off the ability to load policy */
-static int param_set_aalockpolicy(const char *val, struct kernel_param *kp)
+static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp)
{
if (!capable(CAP_MAC_ADMIN))
return -EPERM;
@@ -760,35 +772,35 @@ static int param_set_aalockpolicy(const char *val, struct kernel_param *kp)
return param_set_bool(val, kp);
}
-static int param_get_aalockpolicy(char *buffer, struct kernel_param *kp)
+static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp)
{
if (!capable(CAP_MAC_ADMIN))
return -EPERM;
return param_get_bool(buffer, kp);
}
-static int param_set_aabool(const char *val, struct kernel_param *kp)
+static int param_set_aabool(const char *val, const struct kernel_param *kp)
{
if (!capable(CAP_MAC_ADMIN))
return -EPERM;
return param_set_bool(val, kp);
}
-static int param_get_aabool(char *buffer, struct kernel_param *kp)
+static int param_get_aabool(char *buffer, const struct kernel_param *kp)
{
if (!capable(CAP_MAC_ADMIN))
return -EPERM;
return param_get_bool(buffer, kp);
}
-static int param_set_aauint(const char *val, struct kernel_param *kp)
+static int param_set_aauint(const char *val, const struct kernel_param *kp)
{
if (!capable(CAP_MAC_ADMIN))
return -EPERM;
return param_set_uint(val, kp);
}
-static int param_get_aauint(char *buffer, struct kernel_param *kp)
+static int param_get_aauint(char *buffer, const struct kernel_param *kp)
{
if (!capable(CAP_MAC_ADMIN))
return -EPERM;