#include <linux/kthread.h>
#include "ubi.h"
+#if 0
+ #define gprintk(fmt, x... ) printk( "%s: " fmt, __FUNCTION__ , ## x)
+#else
+ #define gprintk(x...) do { } while (0)
+#endif
+
+
/* Maximum length of the 'mtd=' parameter */
#define MTD_PARAM_LEN_MAX 64
+
+/* add by Nancy begin */
+
+/* These are exported solely for the purpose of mtd_blkdevs.c. You
+ should not use them for _anything_ else */
+DEFINE_MUTEX(vol_table_mutex);
+struct ubi_volume *vol_table[UBI_MAX_VOLUMES];
+
+EXPORT_SYMBOL_GPL(vol_table_mutex);
+EXPORT_SYMBOL_GPL(vol_table);
+
+static LIST_HEAD(vol_notifiers);
+
+/**
+ * add_mtd_device - register an MTD device
+ * @mtd: pointer to new MTD device info structure
+ *
+ * Add a device to the list of MTD devices present in the system, and
+ * notify each currently active MTD 'user' of its arrival. Returns
+ * zero on success or 1 on failure, which currently will only happen
+ * if the number of present devices exceeds MAX_MTD_DEVICES (i.e. 16)
+ */
+
+int add_vol_device(struct ubi_volume *vol)
+{
+ int i;
+
+gprintk("1 vol->vol_id = %d, vol->ubi->ubi_num = %d\n", vol->vol_id, vol->ubi->ubi_num);
+
+ if( vol->ubi->ubi_num != 1 )
+ return 0; // just return
+
+ mutex_lock(&vol_table_mutex);
+ if( !vol_table[vol->vol_id] ) // vol->vol_id°¡ 0ÀÎ ³à¼®ÀÌ NULLÀÎ °æ¿ì
+ {
+ struct list_head *this;
+
+ vol_table[vol->vol_id] = vol;
+ gprintk("val_table add\n");
+
+ /* No need to get a refcount on the module containing
+ the notifier, since we hold the mtd_table_mutex */
+ list_for_each(this, &vol_notifiers) {
+ struct vol_notifier *not = list_entry(this, struct vol_notifier, list);
+ not->add(vol);
+ }
+
+ mutex_unlock(&vol_table_mutex);
+ /* We _know_ we aren't being removed, because
+ our caller is still holding us here. So none
+ of this try_ nonsense, and no bitching about it
+ either. :) */
+ __module_get(THIS_MODULE);
+ return 0;
+ }
+ mutex_unlock(&vol_table_mutex);
+ return 1;
+}
+
+/**
+ * del_mtd_device - unregister an MTD device
+ * @mtd: pointer to MTD device info structure
+ *
+ * Remove a device from the list of MTD devices present in the system,
+ * and notify each currently active MTD 'user' of its departure.
+ * Returns zero on success or 1 on failure, which currently will happen
+ * if the requested device does not appear to be present in the list.
+ */
+
+int del_vol_device (struct ubi_volume *vol)
+{
+ int ret;
+
+ mutex_lock(&vol_table_mutex);
+ if (vol_table[vol->vol_id] != vol) {
+ ret = -ENODEV;
+ } else if (vol->readers ||vol->writers || vol->exclusive) {
+ printk(KERN_NOTICE "Removing MTD device #%d (%s) with use count 0\n",
+ vol->vol_id, vol->name);
+ ret = -EBUSY;
+ } else {
+ struct list_head *this;
+
+ /* No need to get a refcount on the module containing
+ the notifier, since we hold the mtd_table_mutex */
+ list_for_each(this, &vol_notifiers) {
+ struct vol_notifier *not = list_entry(this, struct vol_notifier, list);
+ not->remove(vol);
+ }
+
+ vol_table[vol->vol_id] = NULL;
+
+ module_put(THIS_MODULE);
+ ret = 0;
+ }
+ mutex_unlock(&vol_table_mutex);
+ return ret;
+}
+
+/**
+ * register_mtd_user - register a 'user' of MTD devices.
+ * @new: pointer to notifier info structure
+ *
+ * Registers a pair of callbacks function to be called upon addition
+ * or removal of MTD devices. Causes the 'add' callback to be immediately
+ * invoked for each MTD device currently present in the system.
+ */
+
+void register_vol_user(struct vol_notifier *new)
+{
+ int i;
+gprintk("1\n");
+ mutex_lock(&vol_table_mutex);
+
+ list_add(&new->list, &vol_notifiers);
+
+ __module_get(THIS_MODULE);
+
+ for (i=0; i< UBI_MAX_VOLUMES; i++)
+ if (vol_table[i])
+ new->add(vol_table[i]);
+
+ mutex_unlock(&vol_table_mutex);
+}
+
+/**
+ * unregister_mtd_user - unregister a 'user' of MTD devices.
+ * @old: pointer to notifier info structure
+ *
+ * Removes a callback function pair from the list of 'users' to be
+ * notified upon addition or removal of MTD devices. Causes the
+ * 'remove' callback to be immediately invoked for each MTD device
+ * currently present in the system.
+ */
+
+int unregister_vol_user(struct vol_notifier *old)
+{
+ int i;
+
+gprintk("1\n");
+ mutex_lock(&vol_table_mutex);
+
+ module_put(THIS_MODULE);
+
+ for (i=0; i< UBI_MAX_VOLUMES; i++)
+ if (vol_table[i])
+ old->remove(vol_table[i]);
+
+ list_del(&old->list);
+ mutex_unlock(&vol_table_mutex);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(add_vol_device);
+EXPORT_SYMBOL_GPL(del_vol_device);
+EXPORT_SYMBOL_GPL(register_vol_user);
+EXPORT_SYMBOL_GPL(unregister_vol_user);
+
+/* add by Nancy end*/
+
+
+
+
/**
* struct mtd_dev_param - MTD device parameter description data structure.
* @name: MTD device name or number string
* @vid_hdr_offs: VID header offset
*/
-struct mtd_dev_param
-{
+struct mtd_dev_param {
char name[MTD_PARAM_LEN_MAX];
int vid_hdr_offs;
};
/* Numbers of elements set in the @mtd_dev_param array */
-static int mtd_devs = 0;
+static int mtd_devs;
/* MTD devices specification parameters */
static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
/* Protects @ubi_devices and @ubi->ref_count */
static DEFINE_SPINLOCK(ubi_devices_lock);
+EXPORT_SYMBOL_GPL(ubi_devices_lock);
/* "Show" method for files in '/<sysfs>/class/ubi/' */
static ssize_t ubi_version_show(struct class *class, char *buf)
if (ubi) {
ubi_assert(ubi->ref_count >= 0);
ubi->ref_count += 1;
+ gprintk("ubi_num = %d, refcount = %d\n", ubi_num, ubi->ref_count);
get_device(&ubi->dev);
}
spin_unlock(&ubi_devices_lock);
}
/**
- * ubi_get_by_major - get UBI device description object by character device
- * major number.
+ * ubi_get_by_major - get UBI device by character device major number.
* @major: major number
*
* This function is similar to 'ubi_get_device()', but it searches the device
spin_lock(&ubi_devices_lock);
for (i = 0; i < UBI_MAX_DEVICES; i++) {
struct ubi_device *ubi = ubi_devices[i];
-
- if (ubi && MAJOR(ubi->cdev.dev) == major) {
+gprintk("major = %d, i = %d, ubi->ubi_num = %d\n", major, i, ubi->ubi_num);
+ if ( (ubi && MAJOR(ubi->cdev.dev) == major) ||
+ (ubi && ubi->bdev_major == major)) {
+
ubi_num = ubi->ubi_num;
break;
}
return ubi_num;
}
+EXPORT_SYMBOL_GPL(ubi_major2num);
+
/* "Show" method for files in '/<sysfs>/class/ubi/ubiX/' */
static ssize_t dev_attribute_show(struct device *dev,
return ret;
}
-/* Fake "release" method for UBI devices */
-static void dev_release(struct device *dev) { }
+static void dev_release(struct device *dev)
+{
+ struct ubi_device *ubi = container_of(dev, struct ubi_device, dev);
+
+ kfree(ubi);
+}
/**
* ubi_sysfs_init - initialize sysfs for an UBI device.
ubi_free_volume(ubi, ubi->volumes[i]);
}
+/**
+ * free_user_volumes - free all user volumes.
+ * @ubi: UBI device description object
+ *
+ * Normally the volumes are freed at the release function of the volume device
+ * objects. However, on error paths the volumes have to be freed before the
+ * device objects have been initialized.
+ */
+static void free_user_volumes(struct ubi_device *ubi)
+{
+ int i;
+
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ if (ubi->volumes[i]) {
+ kfree(ubi->volumes[i]->eba_tbl);
+ kfree(ubi->volumes[i]);
+ }
+}
+
/**
* uif_init - initialize user interfaces for an UBI device.
* @ubi: UBI device description object
*
* This function returns zero in case of success and a negative error code in
- * case of failure.
+ * case of failure. Note, this function destroys all volumes if it failes.
*/
static int uif_init(struct ubi_device *ubi)
{
ubi_assert(MINOR(dev) == 0);
cdev_init(&ubi->cdev, &ubi_cdev_operations);
- dbg_msg("%s major is %u", ubi->ubi_name, MAJOR(dev));
+ dbg_gen("%s major is %u", ubi->ubi_name, MAJOR(dev));
ubi->cdev.owner = THIS_MODULE;
err = cdev_add(&ubi->cdev, dev, 1);
/**
* uif_close - close user interfaces for an UBI device.
* @ubi: UBI device description object
+ *
+ * Note, since this function un-registers UBI volume device objects (@vol->dev),
+ * the memory allocated voe the volumes is freed as well (in the release
+ * function).
*/
static void uif_close(struct ubi_device *ubi)
{
unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
}
+/**
+ * free_internal_volumes - free internal volumes.
+ * @ubi: UBI device description object
+ */
+static void free_internal_volumes(struct ubi_device *ubi)
+{
+ int i;
+
+ for (i = ubi->vtbl_slots;
+ i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
+ kfree(ubi->volumes[i]->eba_tbl);
+ kfree(ubi->volumes[i]);
+ }
+}
+
/**
* attach_by_scanning - attach an MTD device using scanning method.
* @ubi: UBI device descriptor
out_wl:
ubi_wl_close(ubi);
out_vtbl:
+ free_internal_volumes(ubi);
vfree(ubi->vtbl);
out_si:
ubi_scan_destroy_si(si);
}
/**
- * io_init - initialize I/O unit for a given UBI device.
+ * io_init - initialize I/O sub-system for a given UBI device.
* @ubi: UBI device description object
*
* If @ubi->vid_hdr_offset or @ubi->leb_start is zero, default offsets are
ubi->min_io_size = ubi->mtd->writesize;
ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft;
- /* Make sure minimal I/O unit is power of 2 */
+ /*
+ * Make sure minimal I/O unit is power of 2. Note, there is no
+ * fundamental reason for this assumption. It is just an optimization
+ * which allows us to avoid costly division operations.
+ */
if (!is_power_of_2(ubi->min_io_size)) {
ubi_err("min. I/O unit (%d) is not power of 2",
ubi->min_io_size);
if (ubi->vid_hdr_offset < UBI_EC_HDR_SIZE ||
ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE ||
ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE ||
- ubi->leb_start % ubi->min_io_size) {
+ ubi->leb_start & (ubi->min_io_size - 1)) {
ubi_err("bad VID header (%d) or data offsets (%d)",
ubi->vid_hdr_offset, ubi->leb_start);
return -EINVAL;
ubi->ro_mode = 1;
}
+#ifdef CONFIG_POLLUX_KERNEL_BOOT_MESSAGE_ENABLE
ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
ubi->peb_size, ubi->peb_size >> 10);
ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
ubi_msg("VID header offset: %d (aligned %d)",
ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
ubi_msg("data offset: %d", ubi->leb_start);
+#endif
/*
* Note, ideally, we have to initialize ubi->bad_peb_count here. But
/*
* Clear the auto-resize flag in the volume in-memory copy of the
- * volume table, and 'ubi_resize_volume()' will propogate this change
+ * volume table, and 'ubi_resize_volume()' will propagate this change
* to the flash.
*/
ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
struct ubi_vtbl_record vtbl_rec;
/*
- * No avalilable PEBs to re-size the volume, clear the flag on
+ * No available PEBs to re-size the volume, clear the flag on
* flash and exit.
*/
memcpy(&vtbl_rec, &ubi->vtbl[vol_id],
return 0;
}
+
+/* add by Nancy */
+static int bdev_init(struct ubi_device *ubi){
+ int i;
+ for(i=0; i<ubi->vtbl_slots; i++)
+ if(ubi->volumes[i])
+ add_vol_device(ubi->volumes[i]);
+ return 0;
+}
+
+
+
/**
* ubi_attach_mtd_dev - attach an MTD device.
- * @mtd_dev: MTD device description object
+ * @mtd: MTD device description object
* @ubi_num: number to assign to the new UBI device
* @vid_hdr_offset: VID header offset
*
* This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
* to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
- * which case this function finds a vacant device nubert and assings it
+ * which case this function finds a vacant device number and assigns it
* automatically. Returns the new UBI device number in case of success and a
* negative error code in case of failure.
*
int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
{
struct ubi_device *ubi;
- int i, err;
+ int i, err, do_free = 1;
/*
* Check if we already have the same MTD device attached.
if (!ubi_devices[ubi_num])
break;
if (ubi_num == UBI_MAX_DEVICES) {
- dbg_err("only %d UBI devices may be created", UBI_MAX_DEVICES);
+ dbg_err("only %d UBI devices may be created",
+ UBI_MAX_DEVICES);
return -ENFILE;
}
} else {
mutex_init(&ubi->buf_mutex);
mutex_init(&ubi->ckvol_mutex);
- mutex_init(&ubi->volumes_mutex);
+ mutex_init(&ubi->device_mutex);
spin_lock_init(&ubi->volumes_lock);
+#ifdef CONFIG_POLLUX_KERNEL_BOOT_MESSAGE_ENABLE
ubi_msg("attaching mtd%d to ubi%d", mtd->index, ubi_num);
+#endif
err = io_init(ubi);
if (err)
goto out_free;
+ err = -ENOMEM;
ubi->peb_buf1 = vmalloc(ubi->peb_size);
if (!ubi->peb_buf1)
goto out_free;
ubi->peb_buf2 = vmalloc(ubi->peb_size);
if (!ubi->peb_buf2)
- goto out_free;
+ goto out_free;
-#ifdef CONFIG_MTD_UBI_DEBUG
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
mutex_init(&ubi->dbg_buf_mutex);
ubi->dbg_peb_buf = vmalloc(ubi->peb_size);
if (!ubi->dbg_peb_buf)
- goto out_free;
+ goto out_free;
#endif
err = attach_by_scanning(ubi);
err = uif_init(ubi);
if (err)
- goto out_detach;
+ goto out_nofree;
+
+ if( ubi_num == 1 )
+ {
+ gprintk("..............aaaaaaaaaaaa...........\n");
+ err = bdev_init(ubi);
+ if(err)
+ goto out_nofree; // ghcstop: change out_detach ==> out_nofree
+ }
ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
if (IS_ERR(ubi->bgt_thread)) {
goto out_uif;
}
+#ifdef CONFIG_POLLUX_KERNEL_BOOT_MESSAGE_ENABLE
ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
ubi_msg("MTD device name: \"%s\"", mtd->name);
ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
ubi_msg("number of PEBs reserved for bad PEB handling: %d",
ubi->beb_rsvd_pebs);
ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
+#endif
- /* Enable the background thread */
- if (!DBG_DISABLE_BGT) {
+
+ if (!DBG_DISABLE_BGT)
ubi->thread_enabled = 1;
- wake_up_process(ubi->bgt_thread);
- }
+ wake_up_process(ubi->bgt_thread);
ubi_devices[ubi_num] = ubi;
return ubi_num;
out_uif:
uif_close(ubi);
+out_nofree:
+ do_free = 0;
out_detach:
- ubi_eba_close(ubi);
ubi_wl_close(ubi);
+ if (do_free)
+ free_user_volumes(ubi);
+ free_internal_volumes(ubi);
vfree(ubi->vtbl);
out_free:
vfree(ubi->peb_buf1);
vfree(ubi->peb_buf2);
-#ifdef CONFIG_MTD_UBI_DEBUG
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
vfree(ubi->dbg_peb_buf);
#endif
kfree(ubi);
if (ubi->bgt_thread)
kthread_stop(ubi->bgt_thread);
+ /*
+ * Get a reference to the device in order to prevent 'dev_release()'
+ * from freeing @ubi object.
+ */
+ get_device(&ubi->dev);
+
uif_close(ubi);
- ubi_eba_close(ubi);
ubi_wl_close(ubi);
+ free_internal_volumes(ubi);
vfree(ubi->vtbl);
put_mtd_device(ubi->mtd);
vfree(ubi->peb_buf1);
vfree(ubi->peb_buf2);
-#ifdef CONFIG_MTD_UBI_DEBUG
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
vfree(ubi->dbg_peb_buf);
#endif
ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
- kfree(ubi);
+ put_device(&ubi->dev);
return 0;
}
module_exit(ubi_exit);
/**
- * bytes_str_to_int - convert a string representing number of bytes to an
- * integer.
+ * bytes_str_to_int - convert a number of bytes string into an integer.
* @str: the string to convert
*
* This function returns positive resulting integer in case of success and a
git.openpandora.org / pandora-kernel.git / blobdiff