From d36e59e69b8be536c55d6118630f0221cee5ccee Mon Sep 17 00:00:00 2001 From: Joel Reardon Date: Fri, 18 May 2012 15:40:24 +0200 Subject: UBI: add lnum and vol_id to struct ubi_work This is part of a multipart patch to allow UBI to force the erasure of particular logical eraseblock numbers. In this patch, the volume id and LEB number are added to ubi_work data structure, and both are also passed as a parameter to schedule erase to set it appropriately. Whenever ubi_wl_put_peb is called, the lnum is also passed to be forwarded to schedule erase. Later, a new ubi_sync_lnum will be added to execute immediately all work related to that lnum. This was tested by outputting the vol_id and lnum during the schedule of erasure. The ubi thread was disabled and two ubifs drives on separate partitions repeated changed a small number of LEBs. The ubi module was readded, and all the erased LEBs, corresponding to the volumes, were added to the schedule erase queue. Artem: minor tweaks Signed-off-by: Joel Reardon Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/eba.c | 16 ++++++++-------- drivers/mtd/ubi/ubi.h | 3 ++- drivers/mtd/ubi/wl.c | 32 +++++++++++++++++++++++--------- 3 files changed, 33 insertions(+), 18 deletions(-) diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c index 5fa726f9c1f..b703ac7729c 100644 --- a/drivers/mtd/ubi/eba.c +++ b/drivers/mtd/ubi/eba.c @@ -341,7 +341,7 @@ int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol, dbg_eba("erase LEB %d:%d, PEB %d", vol_id, lnum, pnum); vol->eba_tbl[lnum] = UBI_LEB_UNMAPPED; - err = ubi_wl_put_peb(ubi, pnum, 0); + err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 0); out_unlock: leb_write_unlock(ubi, vol_id, lnum); @@ -550,7 +550,7 @@ retry: ubi_free_vid_hdr(ubi, vid_hdr); vol->eba_tbl[lnum] = new_pnum; - ubi_wl_put_peb(ubi, pnum, 1); + ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1); ubi_msg("data was successfully recovered"); return 0; @@ -558,7 +558,7 @@ retry: out_unlock: mutex_unlock(&ubi->buf_mutex); out_put: - ubi_wl_put_peb(ubi, new_pnum, 1); + ubi_wl_put_peb(ubi, vol_id, lnum, new_pnum, 1); ubi_free_vid_hdr(ubi, vid_hdr); return err; @@ -568,7 +568,7 @@ write_error: * get another one. */ ubi_warn("failed to write to PEB %d", new_pnum); - ubi_wl_put_peb(ubi, new_pnum, 1); + ubi_wl_put_peb(ubi, vol_id, lnum, new_pnum, 1); if (++tries > UBI_IO_RETRIES) { ubi_free_vid_hdr(ubi, vid_hdr); return err; @@ -686,7 +686,7 @@ write_error: * eraseblock, so just put it and request a new one. We assume that if * this physical eraseblock went bad, the erase code will handle that. */ - err = ubi_wl_put_peb(ubi, pnum, 1); + err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1); if (err || ++tries > UBI_IO_RETRIES) { ubi_ro_mode(ubi); leb_write_unlock(ubi, vol_id, lnum); @@ -804,7 +804,7 @@ write_error: return err; } - err = ubi_wl_put_peb(ubi, pnum, 1); + err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1); if (err || ++tries > UBI_IO_RETRIES) { ubi_ro_mode(ubi); leb_write_unlock(ubi, vol_id, lnum); @@ -901,7 +901,7 @@ retry: } if (vol->eba_tbl[lnum] >= 0) { - err = ubi_wl_put_peb(ubi, vol->eba_tbl[lnum], 0); + err = ubi_wl_put_peb(ubi, vol_id, lnum, vol->eba_tbl[lnum], 0); if (err) goto out_leb_unlock; } @@ -926,7 +926,7 @@ write_error: goto out_leb_unlock; } - err = ubi_wl_put_peb(ubi, pnum, 1); + err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1); if (err || ++tries > UBI_IO_RETRIES) { ubi_ro_mode(ubi); goto out_leb_unlock; diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index b4b3913f1df..5e1182ca289 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -667,7 +667,8 @@ int ubi_eba_init(struct ubi_device *ubi, struct ubi_attach_info *ai); /* wl.c */ int ubi_wl_get_peb(struct ubi_device *ubi); -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 ubi_wl_flush(struct ubi_device *ubi); int ubi_wl_scrub_peb(struct ubi_device *ubi, int pnum); int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai); diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index c143e611235..70ebfa7bc38 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -140,6 +140,8 @@ * @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 @@ -152,6 +154,8 @@ struct ubi_work { 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; }; @@ -579,13 +583,15 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, * 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; @@ -598,6 +604,8 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e, 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); @@ -798,7 +806,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, 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) @@ -813,7 +821,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, */ 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; @@ -852,7 +860,7 @@ out_not_moved: 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; @@ -971,6 +979,8 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, { 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); @@ -979,7 +989,8 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, 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) { @@ -1009,7 +1020,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, 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; @@ -1077,6 +1088,8 @@ 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 * @@ -1085,7 +1098,8 @@ out_ro: * 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; @@ -1151,7 +1165,7 @@ retry: } 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); @@ -1416,7 +1430,7 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai) 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; } -- cgit v1.2.3