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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 <reardonj@inf.ethz.ch> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
parent
6dd3bc7e60
commit
d36e59e69b
3 changed files with 33 additions and 18 deletions
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@ -341,7 +341,7 @@ int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol,
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dbg_eba("erase LEB %d:%d, PEB %d", vol_id, lnum, pnum);
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vol->eba_tbl[lnum] = UBI_LEB_UNMAPPED;
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err = ubi_wl_put_peb(ubi, pnum, 0);
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err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 0);
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out_unlock:
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leb_write_unlock(ubi, vol_id, lnum);
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@ -550,7 +550,7 @@ static int recover_peb(struct ubi_device *ubi, int pnum, int vol_id, int lnum,
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ubi_free_vid_hdr(ubi, vid_hdr);
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vol->eba_tbl[lnum] = new_pnum;
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ubi_wl_put_peb(ubi, pnum, 1);
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ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
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ubi_msg("data was successfully recovered");
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return 0;
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@ -558,7 +558,7 @@ static int recover_peb(struct ubi_device *ubi, int pnum, int vol_id, int lnum,
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out_unlock:
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mutex_unlock(&ubi->buf_mutex);
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out_put:
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ubi_wl_put_peb(ubi, new_pnum, 1);
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ubi_wl_put_peb(ubi, vol_id, lnum, new_pnum, 1);
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ubi_free_vid_hdr(ubi, vid_hdr);
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return err;
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@ -568,7 +568,7 @@ static int recover_peb(struct ubi_device *ubi, int pnum, int vol_id, int lnum,
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* get another one.
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*/
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ubi_warn("failed to write to PEB %d", new_pnum);
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ubi_wl_put_peb(ubi, new_pnum, 1);
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ubi_wl_put_peb(ubi, vol_id, lnum, new_pnum, 1);
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if (++tries > UBI_IO_RETRIES) {
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ubi_free_vid_hdr(ubi, vid_hdr);
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return err;
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@ -686,7 +686,7 @@ int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
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* eraseblock, so just put it and request a new one. We assume that if
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* this physical eraseblock went bad, the erase code will handle that.
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*/
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err = ubi_wl_put_peb(ubi, pnum, 1);
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err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
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if (err || ++tries > UBI_IO_RETRIES) {
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ubi_ro_mode(ubi);
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leb_write_unlock(ubi, vol_id, lnum);
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@ -804,7 +804,7 @@ int ubi_eba_write_leb_st(struct ubi_device *ubi, struct ubi_volume *vol,
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return err;
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}
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err = ubi_wl_put_peb(ubi, pnum, 1);
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err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
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if (err || ++tries > UBI_IO_RETRIES) {
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ubi_ro_mode(ubi);
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leb_write_unlock(ubi, vol_id, lnum);
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@ -901,7 +901,7 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
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}
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if (vol->eba_tbl[lnum] >= 0) {
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err = ubi_wl_put_peb(ubi, vol->eba_tbl[lnum], 0);
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err = ubi_wl_put_peb(ubi, vol_id, lnum, vol->eba_tbl[lnum], 0);
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if (err)
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goto out_leb_unlock;
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}
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@ -926,7 +926,7 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
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goto out_leb_unlock;
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}
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err = ubi_wl_put_peb(ubi, pnum, 1);
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err = ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
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if (err || ++tries > UBI_IO_RETRIES) {
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ubi_ro_mode(ubi);
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goto out_leb_unlock;
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@ -667,7 +667,8 @@ int ubi_eba_init(struct ubi_device *ubi, struct ubi_attach_info *ai);
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/* wl.c */
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int ubi_wl_get_peb(struct ubi_device *ubi);
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int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture);
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int ubi_wl_put_peb(struct ubi_device *ubi, int vol_id, int lnum,
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int pnum, int torture);
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int ubi_wl_flush(struct ubi_device *ubi);
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int ubi_wl_scrub_peb(struct ubi_device *ubi, int pnum);
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int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai);
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@ -140,6 +140,8 @@
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* @list: a link in the list of pending works
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* @func: worker function
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* @e: physical eraseblock to erase
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* @vol_id: the volume ID on which this erasure is being performed
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* @lnum: the logical eraseblock number
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* @torture: if the physical eraseblock has to be tortured
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*
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* The @func pointer points to the worker function. If the @cancel argument is
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@ -152,6 +154,8 @@ struct ubi_work {
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int (*func)(struct ubi_device *ubi, struct ubi_work *wrk, int cancel);
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/* The below fields are only relevant to erasure works */
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struct ubi_wl_entry *e;
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int vol_id;
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int lnum;
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int torture;
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};
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@ -579,13 +583,15 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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* schedule_erase - schedule an erase work.
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* @ubi: UBI device description object
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* @e: the WL entry of the physical eraseblock to erase
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* @vol_id: the volume ID that last used this PEB
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* @lnum: the last used logical eraseblock number for the PEB
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* @torture: if the physical eraseblock has to be tortured
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*
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* This function returns zero in case of success and a %-ENOMEM in case of
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* failure.
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*/
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static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
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int torture)
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int vol_id, int lnum, int torture)
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{
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struct ubi_work *wl_wrk;
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@ -598,6 +604,8 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
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wl_wrk->func = &erase_worker;
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wl_wrk->e = e;
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wl_wrk->vol_id = vol_id;
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wl_wrk->lnum = lnum;
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wl_wrk->torture = torture;
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schedule_ubi_work(ubi, wl_wrk);
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@ -798,7 +806,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
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ubi->move_to_put = ubi->wl_scheduled = 0;
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spin_unlock(&ubi->wl_lock);
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err = schedule_erase(ubi, e1, 0);
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err = schedule_erase(ubi, e1, vol_id, lnum, 0);
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if (err) {
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kmem_cache_free(ubi_wl_entry_slab, e1);
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if (e2)
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@ -813,7 +821,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
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*/
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dbg_wl("PEB %d (LEB %d:%d) was put meanwhile, erase",
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e2->pnum, vol_id, lnum);
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err = schedule_erase(ubi, e2, 0);
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err = schedule_erase(ubi, e2, vol_id, lnum, 0);
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if (err) {
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kmem_cache_free(ubi_wl_entry_slab, e2);
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goto out_ro;
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@ -852,7 +860,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
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spin_unlock(&ubi->wl_lock);
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ubi_free_vid_hdr(ubi, vid_hdr);
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err = schedule_erase(ubi, e2, torture);
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err = schedule_erase(ubi, e2, vol_id, lnum, torture);
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if (err) {
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kmem_cache_free(ubi_wl_entry_slab, e2);
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goto out_ro;
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@ -971,6 +979,8 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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{
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struct ubi_wl_entry *e = wl_wrk->e;
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int pnum = e->pnum, err, need;
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int vol_id = wl_wrk->vol_id;
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int lnum = wl_wrk->lnum;
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if (cancel) {
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dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec);
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@ -979,7 +989,8 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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return 0;
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}
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dbg_wl("erase PEB %d EC %d", pnum, e->ec);
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dbg_wl("erase PEB %d EC %d LEB %d:%d",
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pnum, e->ec, wl_wrk->vol_id, wl_wrk->lnum);
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err = sync_erase(ubi, e, wl_wrk->torture);
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if (!err) {
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@ -1009,7 +1020,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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int err1;
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/* Re-schedule the LEB for erasure */
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err1 = schedule_erase(ubi, e, 0);
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err1 = schedule_erase(ubi, e, vol_id, lnum, 0);
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if (err1) {
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err = err1;
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goto out_ro;
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@ -1077,6 +1088,8 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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/**
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* ubi_wl_put_peb - return a PEB to the wear-leveling sub-system.
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* @ubi: UBI device description object
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* @vol_id: the volume ID that last used this PEB
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* @lnum: the last used logical eraseblock number for the PEB
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* @pnum: physical eraseblock to return
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* @torture: if this physical eraseblock has to be tortured
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*
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@ -1085,7 +1098,8 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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* occurred to this @pnum and it has to be tested. This function returns zero
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* in case of success, and a negative error code in case of failure.
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*/
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int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture)
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int ubi_wl_put_peb(struct ubi_device *ubi, int vol_id, int lnum,
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int pnum, int torture)
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{
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int err;
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struct ubi_wl_entry *e;
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@ -1151,7 +1165,7 @@ int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture)
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}
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spin_unlock(&ubi->wl_lock);
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err = schedule_erase(ubi, e, torture);
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err = schedule_erase(ubi, e, vol_id, lnum, torture);
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if (err) {
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spin_lock(&ubi->wl_lock);
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wl_tree_add(e, &ubi->used);
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@ -1416,7 +1430,7 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
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e->pnum = aeb->pnum;
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e->ec = aeb->ec;
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ubi->lookuptbl[e->pnum] = e;
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if (schedule_erase(ubi, e, 0)) {
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if (schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0)) {
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kmem_cache_free(ubi_wl_entry_slab, e);
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goto out_free;
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}
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