Merge commit 'origin/master' into next

1 files changed, 49 insertions, 35 deletions

diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index c055511bb1b2..28acd133c997 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -36,6 +36,7 @@
 #include <linux/device.h>
 #include <linux/string.h>
 #include <linux/vmalloc.h>
+#include <linux/notifier.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/ubi.h>
 
@@ -100,6 +101,28 @@ enum {
         UBI_IO_BITFLIPS
 };
 
+/*
+ * Return codes of the 'ubi_eba_copy_leb()' function.
+ *
+ * MOVE_CANCEL_RACE: canceled because the volume is being deleted, the source
+ *                   PEB was put meanwhile, or there is I/O on the source PEB
+ * MOVE_SOURCE_RD_ERR: canceled because there was a read error from the source
+ *                     PEB
+ * MOVE_TARGET_RD_ERR: canceled because there was a read error from the target
+ *                     PEB
+ * MOVE_TARGET_WR_ERR: canceled because there was a write error to the target
+ *                     PEB
+ * MOVE_CANCEL_BITFLIPS: canceled because a bit-flip was detected in the
+ *                       target PEB
+ */
+enum {
+        MOVE_CANCEL_RACE = 1,
+        MOVE_SOURCE_RD_ERR,
+        MOVE_TARGET_RD_ERR,
+        MOVE_TARGET_WR_ERR,
+        MOVE_CANCEL_BITFLIPS,
+};
+
 /**
  * struct ubi_wl_entry - wear-leveling entry.
  * @u.rb: link in the corresponding (free/used) RB-tree
@@ -208,10 +231,6 @@ struct ubi_volume_desc;
  * @changing_leb: %1 if the atomic LEB change ioctl command is in progress
  * @direct_writes: %1 if direct writes are enabled for this volume
  *
- * @gluebi_desc: gluebi UBI volume descriptor
- * @gluebi_refcount: reference count of the gluebi MTD device
- * @gluebi_mtd: MTD device description object of the gluebi MTD device
- *
  * The @corrupted field indicates that the volume's contents is corrupted.
  * Since UBI protects only static volumes, this field is not relevant to
  * dynamic volumes - it is user's responsibility to assure their data
@@ -255,17 +274,6 @@ struct ubi_volume {
         unsigned int updating:1;
         unsigned int changing_leb:1;
         unsigned int direct_writes:1;
-
-#ifdef CONFIG_MTD_UBI_GLUEBI
-        /*
-         * Gluebi-related stuff may be compiled out.
-         * Note: this should not be built into UBI but should be a separate
-         * ubimtd driver which works on top of UBI and emulates MTD devices.
-         */
-        struct ubi_volume_desc *gluebi_desc;
-        int gluebi_refcount;
-        struct mtd_info gluebi_mtd;
-#endif
 };
 
 /**
@@ -305,9 +313,9 @@ struct ubi_wl_entry;
  * @vtbl_slots: how many slots are available in the volume table
  * @vtbl_size: size of the volume table in bytes
  * @vtbl: in-RAM volume table copy
- * @volumes_mutex: protects on-flash volume table and serializes volume
- *                 changes, like creation, deletion, update, re-size,
- *                 re-name and set property
+ * @device_mutex: protects on-flash volume table and serializes volume
+ *                creation, deletion, update, re-size, re-name and set
+ *                property
  *
  * @max_ec: current highest erase counter value
  * @mean_ec: current mean erase counter value
@@ -318,14 +326,15 @@ struct ubi_wl_entry;
  * @alc_mutex: serializes "atomic LEB change" operations
  *
  * @used: RB-tree of used physical eraseblocks
+ * @erroneous: RB-tree of erroneous used physical eraseblocks
  * @free: RB-tree of free physical eraseblocks
  * @scrub: RB-tree of physical eraseblocks which need scrubbing
  * @pq: protection queue (contain physical eraseblocks which are temporarily
  *      protected from the wear-leveling worker)
  * @pq_head: protection queue head
  * @wl_lock: protects the @used, @free, @pq, @pq_head, @lookuptbl, @move_from,
- *           @move_to, @move_to_put @erase_pending, @wl_scheduled and @works
- *           fields
+ *           @move_to, @move_to_put @erase_pending, @wl_scheduled, @works,
+ *           @erroneous, and @erroneous_peb_count fields
  * @move_mutex: serializes eraseblock moves
  * @work_sem: synchronizes the WL worker with use tasks
  * @wl_scheduled: non-zero if the wear-leveling was scheduled
@@ -339,12 +348,15 @@ struct ubi_wl_entry;
  * @bgt_thread: background thread description object
  * @thread_enabled: if the background thread is enabled
  * @bgt_name: background thread name
+ * @reboot_notifier: notifier to terminate background thread before rebooting
  *
  * @flash_size: underlying MTD device size (in bytes)
  * @peb_count: count of physical eraseblocks on the MTD device
  * @peb_size: physical eraseblock size
  * @bad_peb_count: count of bad physical eraseblocks
  * @good_peb_count: count of good physical eraseblocks
+ * @erroneous_peb_count: count of erroneous physical eraseblocks in @erroneous
+ * @max_erroneous: maximum allowed amount of erroneous physical eraseblocks
  * @min_io_size: minimal input/output unit size of the underlying MTD device
  * @hdrs_min_io_size: minimal I/O unit size used for VID and EC headers
  * @ro_mode: if the UBI device is in read-only mode
@@ -366,7 +378,6 @@ struct ubi_wl_entry;
  * @peb_buf2: another buffer of PEB size used for different purposes
  * @buf_mutex: protects @peb_buf1 and @peb_buf2
  * @ckvol_mutex: serializes static volume checking when opening
- * @mult_mutex: serializes operations on multiple volumes, like re-naming
  * @dbg_peb_buf: buffer of PEB size used for debugging
  * @dbg_buf_mutex: protects @dbg_peb_buf
  */
@@ -389,7 +400,7 @@ struct ubi_device {
         int vtbl_slots;
         int vtbl_size;
         struct ubi_vtbl_record *vtbl;
-        struct mutex volumes_mutex;
+        struct mutex device_mutex;
 
         int max_ec;
         /* Note, mean_ec is not updated run-time - should be fixed */
@@ -403,6 +414,7 @@ struct ubi_device {
 
         /* Wear-leveling sub-system's stuff */
         struct rb_root used;
+        struct rb_root erroneous;
         struct rb_root free;
         struct rb_root scrub;
         struct list_head pq[UBI_PROT_QUEUE_LEN];
@@ -420,6 +432,7 @@ struct ubi_device {
         struct task_struct *bgt_thread;
         int thread_enabled;
         char bgt_name[sizeof(UBI_BGT_NAME_PATTERN)+2];
+        struct notifier_block reboot_notifier;
 
         /* I/O sub-system's stuff */
         long long flash_size;
@@ -427,6 +440,8 @@ struct ubi_device {
         int peb_size;
         int bad_peb_count;
         int good_peb_count;
+        int erroneous_peb_count;
+        int max_erroneous;
         int min_io_size;
         int hdrs_min_io_size;
         int ro_mode;
@@ -444,8 +459,7 @@ struct ubi_device {
         void *peb_buf2;
         struct mutex buf_mutex;
         struct mutex ckvol_mutex;
-        struct mutex mult_mutex;
-#ifdef CONFIG_MTD_UBI_DEBUG
+#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
         void *dbg_peb_buf;
         struct mutex dbg_buf_mutex;
 #endif
@@ -457,6 +471,7 @@ extern const struct file_operations ubi_cdev_operations;
 extern const struct file_operations ubi_vol_cdev_operations;
 extern struct class *ubi_class;
 extern struct mutex ubi_devices_mutex;
+extern struct blocking_notifier_head ubi_notifiers;
 
 /* vtbl.c */
 int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
@@ -489,17 +504,6 @@ int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf,
 int ubi_check_volume(struct ubi_device *ubi, int vol_id);
 void ubi_calculate_reserved(struct ubi_device *ubi);
 
-/* gluebi.c */
-#ifdef CONFIG_MTD_UBI_GLUEBI
-int ubi_create_gluebi(struct ubi_device *ubi, struct ubi_volume *vol);
-int ubi_destroy_gluebi(struct ubi_volume *vol);
-void ubi_gluebi_updated(struct ubi_volume *vol);
-#else
-#define ubi_create_gluebi(ubi, vol) 0
-#define ubi_destroy_gluebi(vol) 0
-#define ubi_gluebi_updated(vol)
-#endif
-
 /* eba.c */
 int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol,
                       int lnum);
@@ -549,6 +553,16 @@ struct ubi_device *ubi_get_device(int ubi_num);
 void ubi_put_device(struct ubi_device *ubi);
 struct ubi_device *ubi_get_by_major(int major);
 int ubi_major2num(int major);
+int ubi_volume_notify(struct ubi_device *ubi, struct ubi_volume *vol,
+                      int ntype);
+int ubi_notify_all(struct ubi_device *ubi, int ntype,
+                   struct notifier_block *nb);
+int ubi_enumerate_volumes(struct notifier_block *nb);
+
+/* kapi.c */
+void ubi_do_get_device_info(struct ubi_device *ubi, struct ubi_device_info *di);
+void ubi_do_get_volume_info(struct ubi_device *ubi, struct ubi_volume *vol,
+                            struct ubi_volume_info *vi);
 
 /*
  * ubi_rb_for_each_entry - walk an RB-tree.