* @list: a link in the list of pending works
* @func: worker function
* @e: physical eraseblock to erase
+ * @vol_id: the volume ID on which this erasure is being performed
+ * @lnum: the logical eraseblock number
* @torture: if the physical eraseblock has to be tortured
*
* The @func pointer points to the worker function. If the @cancel argument is
int (*func)(struct ubi_device *ubi, struct ubi_work *wrk, int cancel);
/* The below fields are only relevant to erasure works */
struct ubi_wl_entry *e;
+ int vol_id;
+ int lnum;
int torture;
};
* schedule_erase - schedule an erase work.
* @ubi: UBI device description object
* @e: the WL entry of the physical eraseblock to erase
+ * @vol_id: the volume ID that last used this PEB
+ * @lnum: the last used logical eraseblock number for the PEB
* @torture: if the physical eraseblock has to be tortured
*
* This function returns zero in case of success and a %-ENOMEM in case of
* failure.
*/
static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
- int torture)
+ int vol_id, int lnum, int torture)
{
struct ubi_work *wl_wrk;
wl_wrk->func = &erase_worker;
wl_wrk->e = e;
+ wl_wrk->vol_id = vol_id;
+ wl_wrk->lnum = lnum;
wl_wrk->torture = torture;
schedule_ubi_work(ubi, wl_wrk);
int cancel)
{
int err, scrubbing = 0, torture = 0, protect = 0, erroneous = 0;
- int vol_id = -1, uninitialized_var(lnum);
+ int vol_id = -1, lnum = -1;
struct ubi_wl_entry *e1, *e2;
struct ubi_vid_hdr *vid_hdr;
ubi->move_to_put = ubi->wl_scheduled = 0;
spin_unlock(&ubi->wl_lock);
- err = schedule_erase(ubi, e1, 0);
+ err = schedule_erase(ubi, e1, vol_id, lnum, 0);
if (err) {
kmem_cache_free(ubi_wl_entry_slab, e1);
if (e2)
*/
dbg_wl("PEB %d (LEB %d:%d) was put meanwhile, erase",
e2->pnum, vol_id, lnum);
- err = schedule_erase(ubi, e2, 0);
+ err = schedule_erase(ubi, e2, vol_id, lnum, 0);
if (err) {
kmem_cache_free(ubi_wl_entry_slab, e2);
goto out_ro;
spin_unlock(&ubi->wl_lock);
ubi_free_vid_hdr(ubi, vid_hdr);
- err = schedule_erase(ubi, e2, torture);
+ err = schedule_erase(ubi, e2, vol_id, lnum, torture);
if (err) {
kmem_cache_free(ubi_wl_entry_slab, e2);
goto out_ro;
{
struct ubi_wl_entry *e = wl_wrk->e;
int pnum = e->pnum, err, need;
+ int vol_id = wl_wrk->vol_id;
+ int lnum = wl_wrk->lnum;
if (cancel) {
dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec);
return 0;
}
- dbg_wl("erase PEB %d EC %d", pnum, e->ec);
+ dbg_wl("erase PEB %d EC %d LEB %d:%d",
+ pnum, e->ec, wl_wrk->vol_id, wl_wrk->lnum);
err = sync_erase(ubi, e, wl_wrk->torture);
if (!err) {
int err1;
/* Re-schedule the LEB for erasure */
- err1 = schedule_erase(ubi, e, 0);
+ err1 = schedule_erase(ubi, e, vol_id, lnum, 0);
if (err1) {
err = err1;
goto out_ro;
/**
* ubi_wl_put_peb - return a PEB to the wear-leveling sub-system.
* @ubi: UBI device description object
+ * @vol_id: the volume ID that last used this PEB
+ * @lnum: the last used logical eraseblock number for the PEB
* @pnum: physical eraseblock to return
* @torture: if this physical eraseblock has to be tortured
*
* occurred to this @pnum and it has to be tested. This function returns zero
* in case of success, and a negative error code in case of failure.
*/
-int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture)
+int ubi_wl_put_peb(struct ubi_device *ubi, int vol_id, int lnum,
+ int pnum, int torture)
{
int err;
struct ubi_wl_entry *e;
}
spin_unlock(&ubi->wl_lock);
- err = schedule_erase(ubi, e, torture);
+ err = schedule_erase(ubi, e, vol_id, lnum, torture);
if (err) {
spin_lock(&ubi->wl_lock);
wl_tree_add(e, &ubi->used);
{
struct ubi_wl_entry *e;
- dbg_msg("schedule PEB %d for scrubbing", pnum);
+ ubi_msg("schedule PEB %d for scrubbing", pnum);
retry:
spin_lock(&ubi->wl_lock);
/**
* ubi_wl_flush - flush all pending works.
* @ubi: UBI device description object
+ * @vol_id: the volume id to flush for
+ * @lnum: the logical eraseblock number to flush for
*
- * This function returns zero in case of success and a negative error code in
- * case of failure.
+ * This function executes all pending works for a particular volume id /
+ * logical eraseblock number pair. If either value is set to %UBI_ALL, then it
+ * acts as a wildcard for all of the corresponding volume numbers or logical
+ * eraseblock numbers. It returns zero in case of success and a negative error
+ * code in case of failure.
*/
-int ubi_wl_flush(struct ubi_device *ubi)
+int ubi_wl_flush(struct ubi_device *ubi, int vol_id, int lnum)
{
- int err;
+ int err = 0;
+ int found = 1;
/*
* Erase while the pending works queue is not empty, but not more than
* the number of currently pending works.
*/
- dbg_wl("flush (%d pending works)", ubi->works_count);
- while (ubi->works_count) {
- err = do_work(ubi);
- if (err)
- return err;
+ dbg_wl("flush pending work for LEB %d:%d (%d pending works)",
+ vol_id, lnum, ubi->works_count);
+
+ while (found) {
+ struct ubi_work *wrk;
+ found = 0;
+
+ down_read(&ubi->work_sem);
+ spin_lock(&ubi->wl_lock);
+ list_for_each_entry(wrk, &ubi->works, list) {
+ if ((vol_id == UBI_ALL || wrk->vol_id == vol_id) &&
+ (lnum == UBI_ALL || wrk->lnum == lnum)) {
+ list_del(&wrk->list);
+ ubi->works_count -= 1;
+ ubi_assert(ubi->works_count >= 0);
+ spin_unlock(&ubi->wl_lock);
+
+ err = wrk->func(ubi, wrk, 0);
+ if (err) {
+ up_read(&ubi->work_sem);
+ return err;
+ }
+
+ spin_lock(&ubi->wl_lock);
+ found = 1;
+ break;
+ }
+ }
+ spin_unlock(&ubi->wl_lock);
+ up_read(&ubi->work_sem);
}
/*
down_write(&ubi->work_sem);
up_write(&ubi->work_sem);
- /*
- * And in case last was the WL worker and it canceled the LEB
- * movement, flush again.
- */
- while (ubi->works_count) {
- dbg_wl("flush more (%d pending works)", ubi->works_count);
- err = do_work(ubi);
- if (err)
- return err;
- }
-
- return 0;
+ return err;
}
/**
}
/**
- * ubi_wl_init_scan - initialize the WL sub-system using scanning information.
+ * ubi_wl_init - initialize the WL sub-system using attaching information.
* @ubi: UBI device description object
- * @si: scanning information
+ * @ai: attaching information
*
* This function returns zero in case of success, and a negative error code in
* case of failure.
*/
-int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_attach_info *si)
+int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
{
int err, i;
struct rb_node *rb1, *rb2;
- struct ubi_ainf_volume *sv;
+ struct ubi_ainf_volume *av;
struct ubi_ainf_peb *aeb, *tmp;
struct ubi_wl_entry *e;
spin_lock_init(&ubi->wl_lock);
mutex_init(&ubi->move_mutex);
init_rwsem(&ubi->work_sem);
- ubi->max_ec = si->max_ec;
+ ubi->max_ec = ai->max_ec;
INIT_LIST_HEAD(&ubi->works);
sprintf(ubi->bgt_name, UBI_BGT_NAME_PATTERN, ubi->ubi_num);
INIT_LIST_HEAD(&ubi->pq[i]);
ubi->pq_head = 0;
- list_for_each_entry_safe(aeb, tmp, &si->erase, u.list) {
+ list_for_each_entry_safe(aeb, tmp, &ai->erase, u.list) {
cond_resched();
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
e->pnum = aeb->pnum;
e->ec = aeb->ec;
ubi->lookuptbl[e->pnum] = e;
- if (schedule_erase(ubi, e, 0)) {
+ if (schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0)) {
kmem_cache_free(ubi_wl_entry_slab, e);
goto out_free;
}
}
- list_for_each_entry(aeb, &si->free, u.list) {
+ list_for_each_entry(aeb, &ai->free, u.list) {
cond_resched();
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
ubi->lookuptbl[e->pnum] = e;
}
- ubi_rb_for_each_entry(rb1, sv, &si->volumes, rb) {
- ubi_rb_for_each_entry(rb2, aeb, &sv->root, u.rb) {
+ ubi_rb_for_each_entry(rb1, av, &ai->volumes, rb) {
+ ubi_rb_for_each_entry(rb2, aeb, &av->root, u.rb) {
cond_resched();
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
if (ubi->corr_peb_count)
ubi_err("%d PEBs are corrupted and not used",
ubi->corr_peb_count);
+ err = -ENOSPC;
goto out_free;
}
ubi->avail_pebs -= WL_RESERVED_PEBS;
git.openpandora.org / pandora-kernel.git / blobdiff