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@@ -43,7 +43,6 @@
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#include <asm/pgtable.h>
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#include "ubi-media.h"
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-#include "scan.h"
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/* Maximum number of supported UBI devices */
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#define UBI_MAX_DEVICES 32
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@@ -82,6 +81,12 @@
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*/
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#define UBI_PROT_QUEUE_LEN 10
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+/*
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+ * When a field of the attaching information has this value - its real value is
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+ * unknown.
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+ */
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+#define UBI_UNKNOWN -1
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+
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/*
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* Error codes returned by the I/O sub-system.
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*
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@@ -474,6 +479,121 @@ struct ubi_device {
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struct ubi_debug_info *dbg;
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};
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+/**
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+ * struct ubi_ainf_peb - attach information about a physical eraseblock.
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+ * @ec: erase counter (%UBI_UNKNOWN if it is unknown)
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+ * @pnum: physical eraseblock number
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+ * @lnum: logical eraseblock number
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+ * @scrub: if this physical eraseblock needs scrubbing
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+ * @copy_flag: this LEB is a copy (@copy_flag is set in VID header of this LEB)
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+ * @sqnum: sequence number
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+ * @u: unions RB-tree or @list links
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+ * @u.rb: link in the per-volume RB-tree of &struct ubi_ainf_peb objects
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+ * @u.list: link in one of the eraseblock lists
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+ *
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+ * One object of this type is allocated for each physical eraseblock when
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+ * attaching an MTD device.
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+ */
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+struct ubi_ainf_peb {
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+ int ec;
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+ int pnum;
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+ int lnum;
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+ unsigned int scrub:1;
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+ unsigned int copy_flag:1;
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+ unsigned long long sqnum;
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+ union {
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+ struct rb_node rb;
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+ struct list_head list;
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+ } u;
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+};
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+
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+/**
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+ * struct ubi_ainf_volume - attaching information about a volume.
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+ * @vol_id: volume ID
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+ * @highest_lnum: highest logical eraseblock number in this volume
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+ * @leb_count: number of logical eraseblocks in this volume
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+ * @vol_type: volume type
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+ * @used_ebs: number of used logical eraseblocks in this volume (only for
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+ * static volumes)
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+ * @last_data_size: amount of data in the last logical eraseblock of this
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+ * volume (always equivalent to the usable logical eraseblock
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+ * size in case of dynamic volumes)
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+ * @data_pad: how many bytes at the end of logical eraseblocks of this volume
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+ * are not used (due to volume alignment)
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+ * @compat: compatibility flags of this volume
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+ * @rb: link in the volume RB-tree
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+ * @root: root of the RB-tree containing all the eraseblock belonging to this
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+ * volume (&struct ubi_ainf_peb objects)
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+ *
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+ * One object of this type is allocated for each volume when attaching an MTD
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+ * device.
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+ */
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+struct ubi_ainf_volume {
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+ int vol_id;
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+ int highest_lnum;
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+ int leb_count;
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+ int vol_type;
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+ int used_ebs;
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+ int last_data_size;
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+ int data_pad;
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+ int compat;
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+ struct rb_node rb;
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+ struct rb_root root;
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+};
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+
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+/**
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+ * struct ubi_attach_info - MTD device attaching information.
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+ * @volumes: root of the volume RB-tree
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+ * @corr: list of corrupted physical eraseblocks
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+ * @free: list of free physical eraseblocks
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+ * @erase: list of physical eraseblocks which have to be erased
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+ * @alien: list of physical eraseblocks which should not be used by UBI (e.g.,
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+ * those belonging to "preserve"-compatible internal volumes)
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+ * @corr_peb_count: count of PEBs in the @corr list
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+ * @empty_peb_count: count of PEBs which are presumably empty (contain only
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+ * 0xFF bytes)
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+ * @alien_peb_count: count of PEBs in the @alien list
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+ * @bad_peb_count: count of bad physical eraseblocks
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+ * @maybe_bad_peb_count: count of bad physical eraseblocks which are not marked
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+ * as bad yet, but which look like bad
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+ * @vols_found: number of volumes found
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+ * @highest_vol_id: highest volume ID
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+ * @is_empty: flag indicating whether the MTD device is empty or not
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+ * @min_ec: lowest erase counter value
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+ * @max_ec: highest erase counter value
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+ * @max_sqnum: highest sequence number value
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+ * @mean_ec: mean erase counter value
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+ * @ec_sum: a temporary variable used when calculating @mean_ec
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+ * @ec_count: a temporary variable used when calculating @mean_ec
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+ * @aeb_slab_cache: slab cache for &struct ubi_ainf_peb objects
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+ *
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+ * This data structure contains the result of attaching an MTD device and may
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+ * be used by other UBI sub-systems to build final UBI data structures, further
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+ * error-recovery and so on.
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+ */
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+struct ubi_attach_info {
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+ struct rb_root volumes;
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+ struct list_head corr;
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+ struct list_head free;
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+ struct list_head erase;
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+ struct list_head alien;
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+ int corr_peb_count;
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+ int empty_peb_count;
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+ int alien_peb_count;
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+ int bad_peb_count;
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+ int maybe_bad_peb_count;
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+ int vols_found;
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+ int highest_vol_id;
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+ int is_empty;
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+ int min_ec;
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+ int max_ec;
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+ unsigned long long max_sqnum;
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+ int mean_ec;
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+ uint64_t ec_sum;
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+ int ec_count;
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+ struct kmem_cache *aeb_slab_cache;
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+};
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+
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#include "debug.h"
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extern struct kmem_cache *ubi_wl_entry_slab;
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@@ -484,6 +604,17 @@ extern struct class *ubi_class;
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extern struct mutex ubi_devices_mutex;
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extern struct blocking_notifier_head ubi_notifiers;
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+/* scan.c */
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+int ubi_add_to_av(struct ubi_device *ubi, struct ubi_attach_info *ai, int pnum,
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+ int ec, const struct ubi_vid_hdr *vid_hdr, int bitflips);
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+struct ubi_ainf_volume *ubi_find_av(const struct ubi_attach_info *ai,
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+ int vol_id);
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+void ubi_remove_av(struct ubi_attach_info *ai, struct ubi_ainf_volume *av);
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+struct ubi_ainf_peb *ubi_early_get_peb(struct ubi_device *ubi,
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+ struct ubi_attach_info *ai);
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+int ubi_attach(struct ubi_device *ubi);
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+void ubi_destroy_ai(struct ubi_attach_info *ai);
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+
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/* vtbl.c */
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int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
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struct ubi_vtbl_record *vtbl_rec);
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@@ -590,6 +721,21 @@ void ubi_do_get_volume_info(struct ubi_device *ubi, struct ubi_volume *vol,
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rb = rb_next(rb), \
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pos = (rb ? container_of(rb, typeof(*pos), member) : NULL))
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+/*
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+ * ubi_move_aeb_to_list - move a PEB from the volume tree to a list.
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+ *
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+ * @av: volume attaching information
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+ * @aeb: attaching eraseblock information
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+ * @list: the list to move to
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+ */
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+static inline void ubi_move_aeb_to_list(struct ubi_ainf_volume *av,
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+ struct ubi_ainf_peb *aeb,
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+ struct list_head *list)
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+{
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+ rb_erase(&aeb->u.rb, &av->root);
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+ list_add_tail(&aeb->u.list, list);
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+}
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+
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/**
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* ubi_zalloc_vid_hdr - allocate a volume identifier header object.
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* @ubi: UBI device description object
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Artem Bityutskiy