Lines Matching refs:wbuf
300 struct ubifs_wbuf *wbuf = container_of(timer, struct ubifs_wbuf, timer);
302 dbg_io("jhead %s", dbg_jhead(wbuf->jhead));
303 wbuf->need_sync = 1;
304 wbuf->c->need_wbuf_sync = 1;
305 ubifs_wake_up_bgt(wbuf->c);
311 * @wbuf: write-buffer descriptor
313 static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
315 ubifs_assert(!hrtimer_active(&wbuf->timer));
317 if (wbuf->no_timer)
320 dbg_jhead(wbuf->jhead),
321 div_u64(ktime_to_ns(wbuf->softlimit), USEC_PER_SEC),
322 div_u64(ktime_to_ns(wbuf->softlimit) + wbuf->delta,
324 hrtimer_start_range_ns(&wbuf->timer, wbuf->softlimit, wbuf->delta,
330 * @wbuf: write-buffer descriptor
332 static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
334 if (wbuf->no_timer)
336 wbuf->need_sync = 0;
337 hrtimer_cancel(&wbuf->timer);
342 * @wbuf: write-buffer to synchronize
347 int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf)
349 struct ubifs_info *c = wbuf->c;
352 cancel_wbuf_timer_nolock(wbuf);
353 if (!wbuf->used || wbuf->lnum == -1)
358 wbuf->lnum, wbuf->offs, wbuf->used, dbg_jhead(wbuf->jhead));
360 ubifs_assert(!(wbuf->avail & 7));
361 ubifs_assert(wbuf->offs + c->min_io_size <= c->leb_size);
366 ubifs_pad(c, wbuf->buf + wbuf->used, wbuf->avail);
367 err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs,
368 c->min_io_size, wbuf->dtype);
371 c->min_io_size, wbuf->lnum, wbuf->offs);
376 dirt = wbuf->avail;
378 spin_lock(&wbuf->lock);
379 wbuf->offs += c->min_io_size;
380 wbuf->avail = c->min_io_size;
381 wbuf->used = 0;
382 wbuf->next_ino = 0;
383 spin_unlock(&wbuf->lock);
385 if (wbuf->sync_callback)
386 err = wbuf->sync_callback(c, wbuf->lnum,
387 c->leb_size - wbuf->offs, dirt);
393 * @wbuf: write-buffer
402 int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
405 const struct ubifs_info *c = wbuf->c;
407 dbg_io("LEB %d:%d, jhead %s", lnum, offs, dbg_jhead(wbuf->jhead));
411 ubifs_assert(lnum != wbuf->lnum);
413 if (wbuf->used > 0) {
414 int err = ubifs_wbuf_sync_nolock(wbuf);
420 spin_lock(&wbuf->lock);
421 wbuf->lnum = lnum;
422 wbuf->offs = offs;
423 wbuf->avail = c->min_io_size;
424 wbuf->used = 0;
425 spin_unlock(&wbuf->lock);
426 wbuf->dtype = dtype;
454 struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf;
459 * If the mutex is locked then wbuf is being changed, so
462 if (mutex_is_locked(&wbuf->io_mutex))
465 mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
466 if (!wbuf->need_sync) {
467 mutex_unlock(&wbuf->io_mutex);
471 err = ubifs_wbuf_sync_nolock(wbuf);
472 mutex_unlock(&wbuf->io_mutex);
485 struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf;
487 mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
488 cancel_wbuf_timer_nolock(wbuf);
489 mutex_unlock(&wbuf->io_mutex);
496 * @wbuf: write-buffer
500 * This function writes data to flash via write-buffer @wbuf. This means that
509 int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len)
511 struct ubifs_info *c = wbuf->c;
514 dbg_io("%d bytes (%s) to jhead %s wbuf at LEB %d:%d", len,
516 dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs + wbuf->used);
517 ubifs_assert(len > 0 && wbuf->lnum >= 0 && wbuf->lnum < c->leb_cnt);
518 ubifs_assert(wbuf->offs >= 0 && wbuf->offs % c->min_io_size == 0);
519 ubifs_assert(!(wbuf->offs & 7) && wbuf->offs <= c->leb_size);
520 ubifs_assert(wbuf->avail > 0 && wbuf->avail <= c->min_io_size);
521 ubifs_assert(mutex_is_locked(&wbuf->io_mutex));
523 if (c->leb_size - wbuf->offs - wbuf->used < aligned_len) {
528 cancel_wbuf_timer_nolock(wbuf);
533 if (aligned_len <= wbuf->avail) {
538 memcpy(wbuf->buf + wbuf->used, buf, len);
540 if (aligned_len == wbuf->avail) {
541 dbg_io("flush jhead %s wbuf to LEB %d:%d",
542 dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs);
543 err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf,
544 wbuf->offs, c->min_io_size,
545 wbuf->dtype);
549 spin_lock(&wbuf->lock);
550 wbuf->offs += c->min_io_size;
551 wbuf->avail = c->min_io_size;
552 wbuf->used = 0;
553 wbuf->next_ino = 0;
554 spin_unlock(&wbuf->lock);
556 spin_lock(&wbuf->lock);
557 wbuf->avail -= aligned_len;
558 wbuf->used += aligned_len;
559 spin_unlock(&wbuf->lock);
570 dbg_io("flush jhead %s wbuf to LEB %d:%d",
571 dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs);
572 memcpy(wbuf->buf + wbuf->used, buf, wbuf->avail);
573 err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs,
574 c->min_io_size, wbuf->dtype);
578 offs = wbuf->offs + c->min_io_size;
579 len -= wbuf->avail;
580 aligned_len -= wbuf->avail;
581 written = wbuf->avail;
586 * We align node length to 8-byte boundary because we anyway flash wbuf
592 dbg_io("write %d bytes to LEB %d:%d", n, wbuf->lnum, offs);
593 err = ubi_leb_write(c->ubi, wbuf->lnum, buf + written, offs, n,
594 wbuf->dtype);
603 spin_lock(&wbuf->lock);
610 memcpy(wbuf->buf, buf + written, len);
612 wbuf->offs = offs;
613 wbuf->used = aligned_len;
614 wbuf->avail = c->min_io_size - aligned_len;
615 wbuf->next_ino = 0;
616 spin_unlock(&wbuf->lock);
619 if (wbuf->sync_callback) {
620 int free = c->leb_size - wbuf->offs - wbuf->used;
622 err = wbuf->sync_callback(c, wbuf->lnum, free, 0);
627 if (wbuf->used)
628 new_wbuf_timer_nolock(wbuf);
634 len, wbuf->lnum, wbuf->offs, err);
637 dbg_dump_leb(c, wbuf->lnum);
684 * @wbuf: wbuf to check for un-written data
697 int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
700 const struct ubifs_info *c = wbuf->c;
705 dbg_ntype(type), len, dbg_jhead(wbuf->jhead));
706 ubifs_assert(wbuf && lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
710 spin_lock(&wbuf->lock);
711 overlap = (lnum == wbuf->lnum && offs + len > wbuf->offs);
714 spin_unlock(&wbuf->lock);
718 /* Don't read under wbuf */
719 rlen = wbuf->offs - offs;
724 memcpy(buf + rlen, wbuf->buf + offs + rlen - wbuf->offs, len - rlen);
725 spin_unlock(&wbuf->lock);
827 * @wbuf: write-buffer to initialize
832 int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
836 wbuf->buf = kmalloc(c->min_io_size, GFP_KERNEL);
837 if (!wbuf->buf)
841 wbuf->inodes = kmalloc(size, GFP_KERNEL);
842 if (!wbuf->inodes) {
843 kfree(wbuf->buf);
844 wbuf->buf = NULL;
848 wbuf->used = 0;
849 wbuf->lnum = wbuf->offs = -1;
850 wbuf->avail = c->min_io_size;
851 wbuf->dtype = UBI_UNKNOWN;
852 wbuf->sync_callback = NULL;
853 mutex_init(&wbuf->io_mutex);
854 spin_lock_init(&wbuf->lock);
855 wbuf->c = c;
856 wbuf->next_ino = 0;
858 hrtimer_init(&wbuf->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
859 wbuf->timer.function = wbuf_timer_callback_nolock;
860 wbuf->softlimit = ktime_set(WBUF_TIMEOUT_SOFTLIMIT, 0);
861 wbuf->delta = WBUF_TIMEOUT_HARDLIMIT - WBUF_TIMEOUT_SOFTLIMIT;
862 wbuf->delta *= 1000000000ULL;
863 ubifs_assert(wbuf->delta <= ULONG_MAX);
868 * ubifs_wbuf_add_ino_nolock - add an inode number into the wbuf inode array.
869 * @wbuf: the write-buffer where to add
874 void ubifs_wbuf_add_ino_nolock(struct ubifs_wbuf *wbuf, ino_t inum)
876 if (!wbuf->buf)
880 spin_lock(&wbuf->lock);
881 if (wbuf->used)
882 wbuf->inodes[wbuf->next_ino++] = inum;
883 spin_unlock(&wbuf->lock);
887 * wbuf_has_ino - returns if the wbuf contains data from the inode.
888 * @wbuf: the write-buffer
894 static int wbuf_has_ino(struct ubifs_wbuf *wbuf, ino_t inum)
898 spin_lock(&wbuf->lock);
899 for (i = 0; i < wbuf->next_ino; i++)
900 if (inum == wbuf->inodes[i]) {
904 spin_unlock(&wbuf->lock);
923 struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf;
934 if (!wbuf_has_ino(wbuf, inode->i_ino))
937 mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
938 if (wbuf_has_ino(wbuf, inode->i_ino))
939 err = ubifs_wbuf_sync_nolock(wbuf);
940 mutex_unlock(&wbuf->io_mutex);