* not implemented.
*/
if (err == UBI_IO_BAD_VID_HDR) {
- ubi_warn("bad VID header at PEB %d, LEB"
- "%d:%d", pnum, vol_id, lnum);
+ ubi_warn("corrupted VID header at PEB "
+ "%d, LEB %d:%d", pnum, vol_id,
+ lnum);
err = -EBADMSG;
} else
ubi_ro_mode(ubi);
* physical eraseblock @to. The @vid_hdr buffer may be changed by this
* function. Returns:
* o %0 in case of success;
- * o %1 if the operation was canceled because the volume is being deleted
- * or because the PEB was put meanwhile;
- * o %2 if the operation was canceled because there was a write error to the
- * target PEB;
- * o %-EAGAIN if the operation was canceled because a bit-flip was detected
- * in the target PEB;
+ * o %MOVE_CANCEL_RACE, %MOVE_TARGET_WR_ERR, %MOVE_CANCEL_BITFLIPS, etc;
* o a negative error code in case of failure.
*/
int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
vol_id = be32_to_cpu(vid_hdr->vol_id);
lnum = be32_to_cpu(vid_hdr->lnum);
- dbg_eba("copy LEB %d:%d, PEB %d to PEB %d", vol_id, lnum, from, to);
+ dbg_wl("copy LEB %d:%d, PEB %d to PEB %d", vol_id, lnum, from, to);
if (vid_hdr->vol_type == UBI_VID_STATIC) {
data_size = be32_to_cpu(vid_hdr->data_size);
* be locked in 'ubi_wl_put_peb()' and wait for the WL worker to finish.
*/
vol = ubi->volumes[idx];
+ spin_unlock(&ubi->volumes_lock);
if (!vol) {
/* No need to do further work, cancel */
- dbg_eba("volume %d is being removed, cancel", vol_id);
- spin_unlock(&ubi->volumes_lock);
- return 1;
+ dbg_wl("volume %d is being removed, cancel", vol_id);
+ return MOVE_CANCEL_RACE;
}
- spin_unlock(&ubi->volumes_lock);
/*
* We do not want anybody to write to this logical eraseblock while we
* (@from). This task locks the LEB and goes sleep in the
* 'ubi_wl_put_peb()' function on the @ubi->move_mutex. In turn, we are
* holding @ubi->move_mutex and go sleep on the LEB lock. So, if the
- * LEB is already locked, we just do not move it and return %1.
+ * LEB is already locked, we just do not move it and return
+ * %MOVE_CANCEL_RACE, which means that UBI will re-try, but later.
*/
err = leb_write_trylock(ubi, vol_id, lnum);
if (err) {
- dbg_eba("contention on LEB %d:%d, cancel", vol_id, lnum);
- return err;
+ dbg_wl("contention on LEB %d:%d, cancel", vol_id, lnum);
+ return MOVE_CANCEL_RACE;
}
/*
* cancel it.
*/
if (vol->eba_tbl[lnum] != from) {
- dbg_eba("LEB %d:%d is no longer mapped to PEB %d, mapped to "
- "PEB %d, cancel", vol_id, lnum, from,
- vol->eba_tbl[lnum]);
- err = 1;
+ dbg_wl("LEB %d:%d is no longer mapped to PEB %d, mapped to "
+ "PEB %d, cancel", vol_id, lnum, from,
+ vol->eba_tbl[lnum]);
+ err = MOVE_CANCEL_RACE;
goto out_unlock_leb;
}
/*
* OK, now the LEB is locked and we can safely start moving it. Since
- * this function utilizes the @ubi->peb1_buf buffer which is shared
- * with some other functions, so lock the buffer by taking the
+ * this function utilizes the @ubi->peb_buf1 buffer which is shared
+ * with some other functions - we lock the buffer by taking the
* @ubi->buf_mutex.
*/
mutex_lock(&ubi->buf_mutex);
- dbg_eba("read %d bytes of data", aldata_size);
+ dbg_wl("read %d bytes of data", aldata_size);
err = ubi_io_read_data(ubi, ubi->peb_buf1, from, 0, aldata_size);
if (err && err != UBI_IO_BITFLIPS) {
ubi_warn("error %d while reading data from PEB %d",
err, from);
+ if (err == -EIO)
+ err = MOVE_SOURCE_RD_ERR;
goto out_unlock_buf;
}
cond_resched();
/*
- * It may turn out to me that the whole @from physical eraseblock
+ * It may turn out to be that the whole @from physical eraseblock
* contains only 0xFF bytes. Then we have to only write the VID header
* and do not write any data. This also means we should not set
* @vid_hdr->copy_flag, @vid_hdr->data_size, and @vid_hdr->data_crc.
err = ubi_io_write_vid_hdr(ubi, to, vid_hdr);
if (err) {
if (err == -EIO)
- err = 2;
+ err = MOVE_TARGET_WR_ERR;
goto out_unlock_buf;
}
/* Read the VID header back and check if it was written correctly */
err = ubi_io_read_vid_hdr(ubi, to, vid_hdr, 1);
if (err) {
- if (err != UBI_IO_BITFLIPS)
+ if (err != UBI_IO_BITFLIPS) {
ubi_warn("cannot read VID header back from PEB %d", to);
- else
- err = -EAGAIN;
+ if (err == -EIO)
+ err = MOVE_TARGET_RD_ERR;
+ } else
+ err = MOVE_CANCEL_BITFLIPS;
goto out_unlock_buf;
}
err = ubi_io_write_data(ubi, ubi->peb_buf1, to, 0, aldata_size);
if (err) {
if (err == -EIO)
- err = 2;
+ err = MOVE_TARGET_WR_ERR;
goto out_unlock_buf;
}
err = ubi_io_read_data(ubi, ubi->peb_buf2, to, 0, aldata_size);
if (err) {
- if (err != UBI_IO_BITFLIPS)
+ if (err != UBI_IO_BITFLIPS) {
ubi_warn("cannot read data back from PEB %d",
to);
- else
- err = -EAGAIN;
+ if (err == -EIO)
+ err = MOVE_TARGET_RD_ERR;
+ } else
+ err = MOVE_CANCEL_BITFLIPS;
goto out_unlock_buf;
}
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff