[PATCH v2 07/10 linux-next] cdrom: export sysctl code

From: Fabian Frederick
Date: Mon Nov 10 2014 - 15:23:16 EST

-Move all sysctl operations to cdrom_sysctl
-Remove static/add extern in cdrom.h for some variables
-Prefix those variables with cdrom_ (suggested by Joe Perches)
-Fix some checkpatch warnings
-Update cdrom makefile accordingly.

Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
---
drivers/cdrom/Makefile | 1 +
drivers/cdrom/cdrom.c | 367 +++----------------------------------------
drivers/cdrom/cdrom_sysctl.c | 297 ++++++++++++++++++++++++++++++++++
include/linux/cdrom.h | 33 ++++
4 files changed, 354 insertions(+), 344 deletions(-)
create mode 100644 drivers/cdrom/cdrom_sysctl.c

diff --git a/drivers/cdrom/Makefile b/drivers/cdrom/Makefile
index 8ffde4f..53609b0 100644
--- a/drivers/cdrom/Makefile
+++ b/drivers/cdrom/Makefile
@@ -9,5 +9,6 @@ obj-$(CONFIG_BLK_DEV_IDECD) += cdrom.o
obj-$(CONFIG_BLK_DEV_SR) += cdrom.o
obj-$(CONFIG_PARIDE_PCD) += cdrom.o
obj-$(CONFIG_CDROM_PKTCDVD) += cdrom.o
+obj-$(CONFIG_SYSCTL) += cdrom_sysctl.o

obj-$(CONFIG_GDROM) += gdrom.o cdrom.o
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index a1a26d5..9b08f91 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -242,11 +242,6 @@

-------------------------------------------------------------------------*/

-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#define REVISION "Revision: 3.20"
-#define VERSION "Id: cdrom.c 3.20 2003/12/17"
-
/* I use an error-log mask to give fine grain control over the type of
messages dumped to the system logs. The available masks include: */
#define CD_NOTHING 0x0
@@ -274,7 +269,6 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/cdrom.h>
-#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/blkpg.h>
#include <linux/init.h>
@@ -284,23 +278,23 @@
#include <linux/uaccess.h>

/* used to tell the module to turn on full debugging messages */
-static bool debug;
+bool cdrom_debug = false;
/* default compatibility mode */
-static bool autoclose = true;
-static bool autoeject;
-static bool lockdoor = true;
+bool cdrom_autoclose = true;
+bool cdrom_autoeject = false;
+bool cdrom_lockdoor = true;
/* will we ever get to use this... sigh. */
-static bool check_media_type;
+bool cdrom_check_media_type = false;
/* automatically restart mrw format */
-static bool mrw_format_restart = true;
-module_param(debug, bool, 0);
-module_param(autoclose, bool, 0);
-module_param(autoeject, bool, 0);
-module_param(lockdoor, bool, 0);
-module_param(check_media_type, bool, 0);
-module_param(mrw_format_restart, bool, 0);
+bool cdrom_mrw_format_restart = true;
+module_param(cdrom_debug, bool, 0);
+module_param(cdrom_autoclose, bool, 0);
+module_param(cdrom_autoeject, bool, 0);
+module_param(cdrom_lockdoor, bool, 0);
+module_param(cdrom_check_media_type, bool, 0);
+module_param(cdrom_mrw_format_restart, bool, 0);

-static DEFINE_MUTEX(cdrom_mutex);
+DEFINE_MUTEX(cdrom_mutex);

static const char * const mrw_format_status[] = {
"not mrw",
@@ -314,32 +308,24 @@ static const char * const mrw_address_space[] = { "DMA", "GAA" };
#if (ERRLOGMASK != CD_NOTHING)
#define cd_dbg(type, fmt, ...) \
do { \
- if ((ERRLOGMASK & type) || debug) \
+ if ((ERRLOGMASK & type) || cdrom_debug) \
pr_debug(fmt, ##__VA_ARGS__); \
} while (0)
#else
#define cd_dbg(type, fmt, ...) \
do { \
- if (0 && (ERRLOGMASK & type) || debug) \
+ if (0 && (ERRLOGMASK & type) || cdrom_debug) \
pr_debug(fmt, ##__VA_ARGS__); \
} while (0)
#endif

-/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
- a lot of places. This macro makes the code more clear. */
-#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
-
/*
* Another popular OS uses 7 seconds as the hard timeout for default
* commands, so it is a good choice for us as well.
*/
#define CDROM_DEF_TIMEOUT (7 * HZ)

-/* Not-exported routines. */
-
-static void cdrom_sysctl_register(void);
-
-static LIST_HEAD(cdrom_list);
+LIST_HEAD(cdrom_list);

static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
struct packet_command *cgc)
@@ -612,13 +598,13 @@ int register_cdrom(struct cdrom_device_info *cdi)
cdo->n_minors = 0;
cdi->options = CDO_USE_FFLAGS;

- if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
+ if (cdrom_autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
cdi->options |= (int) CDO_AUTO_CLOSE;
- if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
+ if (cdrom_autoeject && CDROM_CAN(CDC_OPEN_TRAY))
cdi->options |= (int) CDO_AUTO_EJECT;
- if (lockdoor)
+ if (cdrom_lockdoor)
cdi->options |= (int) CDO_LOCK;
- if (check_media_type)
+ if (cdrom_check_media_type)
cdi->options |= (int) CDO_CHECK_TYPE;

if (CDROM_CAN(CDC_MRW_W))
@@ -809,7 +795,7 @@ static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
if (!di.mrw_status)
ret = 1;
else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
- mrw_format_restart)
+ cdrom_mrw_format_restart)
ret = cdrom_mrw_bgformat(cdi, 1);

return ret;
@@ -2492,8 +2478,8 @@ static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,

if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- debug = arg ? 1 : 0;
- return debug;
+ cdrom_debug = arg ? 1 : 0;
+ return cdrom_debug;
}

static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
@@ -3406,313 +3392,6 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
}
EXPORT_SYMBOL(cdrom_ioctl);

-#ifdef CONFIG_SYSCTL
-
-#define CDROM_STR_SIZE 1000
-
-static struct cdrom_sysctl_settings {
- char info[CDROM_STR_SIZE]; /* general info */
- int autoclose; /* close tray upon mount, etc */
- int autoeject; /* eject on umount */
- int debug; /* turn on debugging messages */
- int lock; /* lock the door on device open */
- int check; /* check media type */
-} cdrom_sysctl_settings;
-
-enum cdrom_print_option {
- CTL_NAME,
- CTL_SPEED,
- CTL_SLOTS,
- CTL_CAPABILITY
-};
-
-static int cdrom_print_info(const char *header, int val, char *info,
- int *pos, enum cdrom_print_option option)
-{
- const int max_size = sizeof(cdrom_sysctl_settings.info);
- struct cdrom_device_info *cdi;
- int ret;
-
- ret = scnprintf(info + *pos, max_size - *pos, header);
- if (!ret)
- return 1;
-
- *pos += ret;
-
- list_for_each_entry(cdi, &cdrom_list, list) {
- switch (option) {
- case CTL_NAME:
- ret = scnprintf(info + *pos, max_size - *pos,
- "\t%s", cdi->name);
- break;
- case CTL_SPEED:
- ret = scnprintf(info + *pos, max_size - *pos,
- "\t%d", cdi->speed);
- break;
- case CTL_SLOTS:
- ret = scnprintf(info + *pos, max_size - *pos,
- "\t%d", cdi->capacity);
- break;
- case CTL_CAPABILITY:
- ret = scnprintf(info + *pos, max_size - *pos,
- "\t%d", CDROM_CAN(val) != 0);
- break;
- default:
- pr_info("invalid option%d\n", option);
- return 1;
- }
- if (!ret)
- return 1;
- *pos += ret;
- }
-
- return 0;
-}
-
-static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- int pos;
- char *info = cdrom_sysctl_settings.info;
- const int max_size = sizeof(cdrom_sysctl_settings.info);
-
- if (!*lenp || (*ppos && !write)) {
- *lenp = 0;
- return 0;
- }
-
- mutex_lock(&cdrom_mutex);
-
- pos = sprintf(info, "CD-ROM information, " VERSION "\n");
-
- if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
- goto done;
- if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
- goto done;
- if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
- goto done;
- if (cdrom_print_info("\nCan close tray:\t",
- CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan open tray:\t",
- CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan lock tray:\t",
- CDC_LOCK, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan change speed:",
- CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan select disk:",
- CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan read multisession:",
- CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan read MCN:\t",
- CDC_MCN, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nReports media changed:",
- CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan play audio:\t",
- CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan write CD-R:\t",
- CDC_CD_R, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan write CD-RW:",
- CDC_CD_RW, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan read DVD:\t",
- CDC_DVD, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan write DVD-R:",
- CDC_DVD_R, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan write DVD-RAM:",
- CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan read MRW:\t",
- CDC_MRW, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan write MRW:\t",
- CDC_MRW_W, info, &pos, CTL_CAPABILITY))
- goto done;
- if (cdrom_print_info("\nCan write RAM:\t",
- CDC_RAM, info, &pos, CTL_CAPABILITY))
- goto done;
- if (!scnprintf(info + pos, max_size - pos, "\n\n"))
- goto done;
-doit:
- mutex_unlock(&cdrom_mutex);
- return proc_dostring(ctl, write, buffer, lenp, ppos);
-done:
- pr_info("info buffer too small\n");
- goto doit;
-}
-
-/* Unfortunately, per device settings are not implemented through
- procfs/sysctl yet. When they are, this will naturally disappear. For now
- just update all drives. Later this will become the template on which
- new registered drives will be based. */
-static void cdrom_update_settings(void)
-{
- struct cdrom_device_info *cdi;
-
- mutex_lock(&cdrom_mutex);
- list_for_each_entry(cdi, &cdrom_list, list) {
- if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
- cdi->options |= CDO_AUTO_CLOSE;
- else if (!autoclose)
- cdi->options &= ~CDO_AUTO_CLOSE;
- if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
- cdi->options |= CDO_AUTO_EJECT;
- else if (!autoeject)
- cdi->options &= ~CDO_AUTO_EJECT;
- if (lockdoor && CDROM_CAN(CDC_LOCK))
- cdi->options |= CDO_LOCK;
- else if (!lockdoor)
- cdi->options &= ~CDO_LOCK;
- if (check_media_type)
- cdi->options |= CDO_CHECK_TYPE;
- else
- cdi->options &= ~CDO_CHECK_TYPE;
- }
- mutex_unlock(&cdrom_mutex);
-}
-
-static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- int ret;
-
- ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
-
- if (write) {
-
- /* we only care for 1 or 0. */
- autoclose = !!cdrom_sysctl_settings.autoclose;
- autoeject = !!cdrom_sysctl_settings.autoeject;
- debug = !!cdrom_sysctl_settings.debug;
- lockdoor = !!cdrom_sysctl_settings.lock;
- check_media_type = !!cdrom_sysctl_settings.check;
-
- /* update the option flags according to the changes. we
- don't have per device options through sysctl yet,
- but we will have and then this will disappear. */
- cdrom_update_settings();
- }
-
- return ret;
-}
-
-/* Place files in /proc/sys/dev/cdrom */
-static struct ctl_table cdrom_table[] = {
- {
- .procname = "info",
- .data = &cdrom_sysctl_settings.info,
- .maxlen = CDROM_STR_SIZE,
- .mode = 0444,
- .proc_handler = cdrom_sysctl_info,
- },
- {
- .procname = "autoclose",
- .data = &cdrom_sysctl_settings.autoclose,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = cdrom_sysctl_handler,
- },
- {
- .procname = "autoeject",
- .data = &cdrom_sysctl_settings.autoeject,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = cdrom_sysctl_handler,
- },
- {
- .procname = "debug",
- .data = &cdrom_sysctl_settings.debug,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = cdrom_sysctl_handler,
- },
- {
- .procname = "lock",
- .data = &cdrom_sysctl_settings.lock,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = cdrom_sysctl_handler,
- },
- {
- .procname = "check_media",
- .data = &cdrom_sysctl_settings.check,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = cdrom_sysctl_handler
- },
- { }
-};
-
-static struct ctl_table cdrom_cdrom_table[] = {
- {
- .procname = "cdrom",
- .maxlen = 0,
- .mode = 0555,
- .child = cdrom_table,
- },
- { }
-};
-
-/* Make sure that /proc/sys/dev is there */
-static struct ctl_table cdrom_root_table[] = {
- {
- .procname = "dev",
- .maxlen = 0,
- .mode = 0555,
- .child = cdrom_cdrom_table,
- },
- { }
-};
-static struct ctl_table_header *cdrom_sysctl_header;
-
-static void cdrom_sysctl_register(void)
-{
- static bool initialized;
-
- if (initialized)
- return;
-
- cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
-
- /* set the defaults */
- cdrom_sysctl_settings.autoclose = autoclose;
- cdrom_sysctl_settings.autoeject = autoeject;
- cdrom_sysctl_settings.debug = debug;
- cdrom_sysctl_settings.lock = lockdoor;
- cdrom_sysctl_settings.check = check_media_type;
-
- initialized = true;
-}
-
-static void cdrom_sysctl_unregister(void)
-{
- if (cdrom_sysctl_header)
- unregister_sysctl_table(cdrom_sysctl_header);
-}
-
-#else /* CONFIG_SYSCTL */
-
-static void cdrom_sysctl_register(void)
-{
-}
-
-static void cdrom_sysctl_unregister(void)
-{
-}
-
-#endif /* CONFIG_SYSCTL */
-
static int __init cdrom_init(void)
{
cdrom_sysctl_register();
diff --git a/drivers/cdrom/cdrom_sysctl.c b/drivers/cdrom/cdrom_sysctl.c
new file mode 100644
index 0000000..3035db3
--- /dev/null
+++ b/drivers/cdrom/cdrom_sysctl.c
@@ -0,0 +1,297 @@
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/cdrom.h>
+#include <linux/sysctl.h>
+
+#define CDROM_STR_SIZE 1000
+
+static struct cdrom_sysctl_settings {
+ char info[CDROM_STR_SIZE]; /* general info */
+ int autoclose; /* close tray upon mount, etc */
+ int autoeject; /* eject on umount */
+ int debug; /* turn on debugging messages */
+ int lock; /* lock the door on device open */
+ int check; /* check media type */
+} cdrom_sysctl_settings;
+
+enum cdrom_print_option {
+ CTL_NAME,
+ CTL_SPEED,
+ CTL_SLOTS,
+ CTL_CAPABILITY
+};
+
+static int cdrom_print_info(const char *header, int val, char *info,
+ int *pos, enum cdrom_print_option option)
+{
+ const int max_size = sizeof(cdrom_sysctl_settings.info);
+ struct cdrom_device_info *cdi;
+ int ret;
+
+ ret = scnprintf(info + *pos, max_size - *pos, header);
+ if (!ret)
+ return 1;
+
+ *pos += ret;
+
+ list_for_each_entry(cdi, &cdrom_list, list) {
+ switch (option) {
+ case CTL_NAME:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%s", cdi->name);
+ break;
+ case CTL_SPEED:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%d", cdi->speed);
+ break;
+ case CTL_SLOTS:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%d", cdi->capacity);
+ break;
+ case CTL_CAPABILITY:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%d", CDROM_CAN(val) != 0);
+ break;
+ default:
+ pr_info("invalid option%d\n", option);
+ return 1;
+ }
+ if (!ret)
+ return 1;
+ *pos += ret;
+ }
+
+ return 0;
+}
+
+static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int pos;
+ char *info = cdrom_sysctl_settings.info;
+ const int max_size = sizeof(cdrom_sysctl_settings.info);
+
+ if (!*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+
+ mutex_lock(&cdrom_mutex);
+
+ pos = sprintf(info, "CD-ROM information, " VERSION "\n");
+
+ if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
+ goto done;
+ if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
+ goto done;
+ if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
+ goto done;
+ if (cdrom_print_info("\nCan close tray:\t",
+ CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan open tray:\t",
+ CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan lock tray:\t",
+ CDC_LOCK, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan change speed:",
+ CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan select disk:",
+ CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read multisession:",
+ CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read MCN:\t",
+ CDC_MCN, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nReports media changed:",
+ CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan play audio:\t",
+ CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write CD-R:\t",
+ CDC_CD_R, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write CD-RW:",
+ CDC_CD_RW, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read DVD:\t",
+ CDC_DVD, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write DVD-R:",
+ CDC_DVD_R, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write DVD-RAM:",
+ CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read MRW:\t",
+ CDC_MRW, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write MRW:\t",
+ CDC_MRW_W, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write RAM:\t",
+ CDC_RAM, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (!scnprintf(info + pos, max_size - pos, "\n\n"))
+ goto done;
+doit:
+ mutex_unlock(&cdrom_mutex);
+ return proc_dostring(ctl, write, buffer, lenp, ppos);
+done:
+ pr_info("info buffer too small\n");
+ goto doit;
+}
+
+/* Unfortunately, per device settings are not implemented through
+ procfs/sysctl yet. When they are, this will naturally disappear. For now
+ just update all drives. Later this will become the template on which
+ new registered drives will be based. */
+static void cdrom_update_settings(void)
+{
+ struct cdrom_device_info *cdi;
+
+ mutex_lock(&cdrom_mutex);
+ list_for_each_entry(cdi, &cdrom_list, list) {
+ if (cdrom_autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
+ cdi->options |= CDO_AUTO_CLOSE;
+ else if (!cdrom_autoclose)
+ cdi->options &= ~CDO_AUTO_CLOSE;
+ if (cdrom_autoeject && CDROM_CAN(CDC_OPEN_TRAY))
+ cdi->options |= CDO_AUTO_EJECT;
+ else if (!cdrom_autoeject)
+ cdi->options &= ~CDO_AUTO_EJECT;
+ if (cdrom_lockdoor && CDROM_CAN(CDC_LOCK))
+ cdi->options |= CDO_LOCK;
+ else if (!cdrom_lockdoor)
+ cdi->options &= ~CDO_LOCK;
+ if (cdrom_check_media_type)
+ cdi->options |= CDO_CHECK_TYPE;
+ else
+ cdi->options &= ~CDO_CHECK_TYPE;
+ }
+ mutex_unlock(&cdrom_mutex);
+}
+
+static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int ret;
+
+ ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
+
+ if (write) {
+
+ /* we only care for 1 or 0. */
+ cdrom_autoclose = !!cdrom_sysctl_settings.autoclose;
+ cdrom_autoeject = !!cdrom_sysctl_settings.autoeject;
+ cdrom_debug = !!cdrom_sysctl_settings.debug;
+ cdrom_lockdoor = !!cdrom_sysctl_settings.lock;
+ cdrom_check_media_type = !!cdrom_sysctl_settings.check;
+
+ /* update the option flags according to the changes. we
+ don't have per device options through sysctl yet,
+ but we will have and then this will disappear. */
+ cdrom_update_settings();
+ }
+
+ return ret;
+}
+
+/* Place files in /proc/sys/dev/cdrom */
+static struct ctl_table cdrom_table[] = {
+ {
+ .procname = "info",
+ .data = &cdrom_sysctl_settings.info,
+ .maxlen = CDROM_STR_SIZE,
+ .mode = 0444,
+ .proc_handler = cdrom_sysctl_info,
+ },
+ {
+ .procname = "autoclose",
+ .data = &cdrom_sysctl_settings.autoclose,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "autoeject",
+ .data = &cdrom_sysctl_settings.autoeject,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "debug",
+ .data = &cdrom_sysctl_settings.debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "lock",
+ .data = &cdrom_sysctl_settings.lock,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "check_media",
+ .data = &cdrom_sysctl_settings.check,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler
+ },
+ { }
+};
+
+static struct ctl_table cdrom_cdrom_table[] = {
+ {
+ .procname = "cdrom",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = cdrom_table,
+ },
+ { }
+};
+
+/* Make sure that /proc/sys/dev is there */
+static struct ctl_table cdrom_root_table[] = {
+ {
+ .procname = "dev",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = cdrom_cdrom_table,
+ },
+ { }
+};
+static struct ctl_table_header *cdrom_sysctl_header;
+
+void cdrom_sysctl_register(void)
+{
+ static bool initialized;
+
+ if (initialized)
+ return;
+
+ cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
+
+ /* set the defaults */
+ cdrom_sysctl_settings.autoclose = cdrom_autoclose;
+ cdrom_sysctl_settings.autoeject = cdrom_autoeject;
+ cdrom_sysctl_settings.debug = cdrom_debug;
+ cdrom_sysctl_settings.lock = cdrom_lockdoor;
+ cdrom_sysctl_settings.check = cdrom_check_media_type;
+
+ initialized = true;
+}
+
+void cdrom_sysctl_unregister(void)
+{
+ if (cdrom_sysctl_header)
+ unregister_sysctl_table(cdrom_sysctl_header);
+}
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 8609d57..2c9d6fb 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -10,10 +10,23 @@
#ifndef _LINUX_CDROM_H
#define _LINUX_CDROM_H

+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define REVISION "Revision: 3.20"
+#define VERSION "Id: cdrom.c 3.20 2003/12/17"
+
#include <linux/fs.h> /* not really needed, later.. */
#include <linux/list.h>
#include <uapi/linux/cdrom.h>

+/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
+ a lot of places. This macro makes the code more clear. */
+#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
+
struct packet_command
{
unsigned char cmd[CDROM_PACKET_SIZE];
@@ -311,4 +324,24 @@ static inline int msf_to_lba(u8 m, u8 s, u8 f)
{
return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
}
+
+/* cdrom.c */
+extern bool cdrom_debug;
+extern bool cdrom_autoclose;
+extern bool cdrom_autoeject;
+extern bool cdrom_lockdoor;
+extern bool cdrom_check_media_type;
+extern bool cdrom_mrw_format_restart;
+extern struct list_head cdrom_list;
+extern struct mutex cdrom_mutex;
+
+/* cdrom_sysctl.c */
+#ifdef CONFIG_SYSCTL
+extern void cdrom_sysctl_register(void);
+extern void cdrom_sysctl_unregister(void);
+#else
+#define cdrom_sysctl_register do { } while (0)
+#define cdrom_sysctl_unregister do { } while (0)
+#endif /* CONFIG_SYSCTL */
+
#endif /* _LINUX_CDROM_H */
--
1.9.1

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