Lines Matching full:wbuf
39 * have to make sure that the write-buffer offset (@wbuf->offs) becomes aligned
41 * write-buffer size (@wbuf->size).
443 struct ubifs_wbuf *wbuf = container_of(timer, struct ubifs_wbuf, timer); in wbuf_timer_callback_nolock() local
445 dbg_io("jhead %s", dbg_jhead(wbuf->jhead)); in wbuf_timer_callback_nolock()
446 wbuf->need_sync = 1; in wbuf_timer_callback_nolock()
447 wbuf->c->need_wbuf_sync = 1; in wbuf_timer_callback_nolock()
448 ubifs_wake_up_bgt(wbuf->c); in wbuf_timer_callback_nolock()
454 * @wbuf: write-buffer descriptor
456 static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf) in new_wbuf_timer_nolock() argument
458 ubifs_assert(!hrtimer_active(&wbuf->timer)); in new_wbuf_timer_nolock()
460 if (wbuf->no_timer) in new_wbuf_timer_nolock()
463 dbg_jhead(wbuf->jhead), in new_wbuf_timer_nolock()
464 div_u64(ktime_to_ns(wbuf->softlimit), USEC_PER_SEC), in new_wbuf_timer_nolock()
465 div_u64(ktime_to_ns(wbuf->softlimit) + wbuf->delta, in new_wbuf_timer_nolock()
467 hrtimer_start_range_ns(&wbuf->timer, wbuf->softlimit, wbuf->delta, in new_wbuf_timer_nolock()
474 * @wbuf: write-buffer descriptor
476 static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf) in cancel_wbuf_timer_nolock() argument
478 if (wbuf->no_timer) in cancel_wbuf_timer_nolock()
480 wbuf->need_sync = 0; in cancel_wbuf_timer_nolock()
482 hrtimer_cancel(&wbuf->timer); in cancel_wbuf_timer_nolock()
488 * @wbuf: write-buffer to synchronize
499 int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf) in ubifs_wbuf_sync_nolock() argument
501 struct ubifs_info *c = wbuf->c; in ubifs_wbuf_sync_nolock()
504 cancel_wbuf_timer_nolock(wbuf); in ubifs_wbuf_sync_nolock()
505 if (!wbuf->used || wbuf->lnum == -1) in ubifs_wbuf_sync_nolock()
510 wbuf->lnum, wbuf->offs, wbuf->used, dbg_jhead(wbuf->jhead)); in ubifs_wbuf_sync_nolock()
511 ubifs_assert(!(wbuf->avail & 7)); in ubifs_wbuf_sync_nolock()
512 ubifs_assert(wbuf->offs + wbuf->size <= c->leb_size); in ubifs_wbuf_sync_nolock()
513 ubifs_assert(wbuf->size >= c->min_io_size); in ubifs_wbuf_sync_nolock()
514 ubifs_assert(wbuf->size <= c->max_write_size); in ubifs_wbuf_sync_nolock()
515 ubifs_assert(wbuf->size % c->min_io_size == 0); in ubifs_wbuf_sync_nolock()
517 if (c->leb_size - wbuf->offs >= c->max_write_size) in ubifs_wbuf_sync_nolock()
518 ubifs_assert(!((wbuf->offs + wbuf->size) % c->max_write_size)); in ubifs_wbuf_sync_nolock()
527 sync_len = ALIGN(wbuf->used, c->min_io_size); in ubifs_wbuf_sync_nolock()
528 dirt = sync_len - wbuf->used; in ubifs_wbuf_sync_nolock()
530 ubifs_pad(c, wbuf->buf + wbuf->used, dirt); in ubifs_wbuf_sync_nolock()
531 err = ubifs_leb_write(c, wbuf->lnum, wbuf->buf, wbuf->offs, sync_len); in ubifs_wbuf_sync_nolock()
535 spin_lock(&wbuf->lock); in ubifs_wbuf_sync_nolock()
536 wbuf->offs += sync_len; in ubifs_wbuf_sync_nolock()
538 * Now @wbuf->offs is not necessarily aligned to @c->max_write_size. in ubifs_wbuf_sync_nolock()
541 * Thus, if @wbuf->offs is not aligned to @c->max_write_size now, make in ubifs_wbuf_sync_nolock()
542 * sure that @wbuf->offs + @wbuf->size is aligned to in ubifs_wbuf_sync_nolock()
547 if (c->leb_size - wbuf->offs < c->max_write_size) in ubifs_wbuf_sync_nolock()
548 wbuf->size = c->leb_size - wbuf->offs; in ubifs_wbuf_sync_nolock()
549 else if (wbuf->offs & (c->max_write_size - 1)) in ubifs_wbuf_sync_nolock()
550 wbuf->size = ALIGN(wbuf->offs, c->max_write_size) - wbuf->offs; in ubifs_wbuf_sync_nolock()
552 wbuf->size = c->max_write_size; in ubifs_wbuf_sync_nolock()
553 wbuf->avail = wbuf->size; in ubifs_wbuf_sync_nolock()
554 wbuf->used = 0; in ubifs_wbuf_sync_nolock()
555 wbuf->next_ino = 0; in ubifs_wbuf_sync_nolock()
556 spin_unlock(&wbuf->lock); in ubifs_wbuf_sync_nolock()
558 if (wbuf->sync_callback) in ubifs_wbuf_sync_nolock()
559 err = wbuf->sync_callback(c, wbuf->lnum, in ubifs_wbuf_sync_nolock()
560 c->leb_size - wbuf->offs, dirt); in ubifs_wbuf_sync_nolock()
566 * @wbuf: write-buffer
574 int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs) in ubifs_wbuf_seek_nolock() argument
576 const struct ubifs_info *c = wbuf->c; in ubifs_wbuf_seek_nolock()
578 dbg_io("LEB %d:%d, jhead %s", lnum, offs, dbg_jhead(wbuf->jhead)); in ubifs_wbuf_seek_nolock()
582 ubifs_assert(lnum != wbuf->lnum); in ubifs_wbuf_seek_nolock()
583 ubifs_assert(wbuf->used == 0); in ubifs_wbuf_seek_nolock()
585 spin_lock(&wbuf->lock); in ubifs_wbuf_seek_nolock()
586 wbuf->lnum = lnum; in ubifs_wbuf_seek_nolock()
587 wbuf->offs = offs; in ubifs_wbuf_seek_nolock()
588 if (c->leb_size - wbuf->offs < c->max_write_size) in ubifs_wbuf_seek_nolock()
589 wbuf->size = c->leb_size - wbuf->offs; in ubifs_wbuf_seek_nolock()
590 else if (wbuf->offs & (c->max_write_size - 1)) in ubifs_wbuf_seek_nolock()
591 wbuf->size = ALIGN(wbuf->offs, c->max_write_size) - wbuf->offs; in ubifs_wbuf_seek_nolock()
593 wbuf->size = c->max_write_size; in ubifs_wbuf_seek_nolock()
594 wbuf->avail = wbuf->size; in ubifs_wbuf_seek_nolock()
595 wbuf->used = 0; in ubifs_wbuf_seek_nolock()
596 spin_unlock(&wbuf->lock); in ubifs_wbuf_seek_nolock()
626 struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf; in ubifs_bg_wbufs_sync() local
631 * If the mutex is locked then wbuf is being changed, so in ubifs_bg_wbufs_sync()
634 if (mutex_is_locked(&wbuf->io_mutex)) in ubifs_bg_wbufs_sync()
637 mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead); in ubifs_bg_wbufs_sync()
638 if (!wbuf->need_sync) { in ubifs_bg_wbufs_sync()
639 mutex_unlock(&wbuf->io_mutex); in ubifs_bg_wbufs_sync()
643 err = ubifs_wbuf_sync_nolock(wbuf); in ubifs_bg_wbufs_sync()
644 mutex_unlock(&wbuf->io_mutex); in ubifs_bg_wbufs_sync()
657 struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf; in ubifs_bg_wbufs_sync() local
659 mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead); in ubifs_bg_wbufs_sync()
660 cancel_wbuf_timer_nolock(wbuf); in ubifs_bg_wbufs_sync()
661 mutex_unlock(&wbuf->io_mutex); in ubifs_bg_wbufs_sync()
668 * @wbuf: write-buffer
672 * This function writes data to flash via write-buffer @wbuf. This means that
682 int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len) in ubifs_wbuf_write_nolock() argument
684 struct ubifs_info *c = wbuf->c; in ubifs_wbuf_write_nolock()
687 dbg_io("%d bytes (%s) to jhead %s wbuf at LEB %d:%d", len, in ubifs_wbuf_write_nolock()
689 dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs + wbuf->used); in ubifs_wbuf_write_nolock()
690 ubifs_assert(len > 0 && wbuf->lnum >= 0 && wbuf->lnum < c->leb_cnt); in ubifs_wbuf_write_nolock()
691 ubifs_assert(wbuf->offs >= 0 && wbuf->offs % c->min_io_size == 0); in ubifs_wbuf_write_nolock()
692 ubifs_assert(!(wbuf->offs & 7) && wbuf->offs <= c->leb_size); in ubifs_wbuf_write_nolock()
693 ubifs_assert(wbuf->avail > 0 && wbuf->avail <= wbuf->size); in ubifs_wbuf_write_nolock()
694 ubifs_assert(wbuf->size >= c->min_io_size); in ubifs_wbuf_write_nolock()
695 ubifs_assert(wbuf->size <= c->max_write_size); in ubifs_wbuf_write_nolock()
696 ubifs_assert(wbuf->size % c->min_io_size == 0); in ubifs_wbuf_write_nolock()
697 ubifs_assert(mutex_is_locked(&wbuf->io_mutex)); in ubifs_wbuf_write_nolock()
700 if (c->leb_size - wbuf->offs >= c->max_write_size) in ubifs_wbuf_write_nolock()
701 ubifs_assert(!((wbuf->offs + wbuf->size) % c->max_write_size)); in ubifs_wbuf_write_nolock()
703 if (c->leb_size - wbuf->offs - wbuf->used < aligned_len) { in ubifs_wbuf_write_nolock()
708 cancel_wbuf_timer_nolock(wbuf); in ubifs_wbuf_write_nolock()
713 if (aligned_len <= wbuf->avail) { in ubifs_wbuf_write_nolock()
718 memcpy(wbuf->buf + wbuf->used, buf, len); in ubifs_wbuf_write_nolock()
720 if (aligned_len == wbuf->avail) { in ubifs_wbuf_write_nolock()
721 dbg_io("flush jhead %s wbuf to LEB %d:%d", in ubifs_wbuf_write_nolock()
722 dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs); in ubifs_wbuf_write_nolock()
723 err = ubifs_leb_write(c, wbuf->lnum, wbuf->buf, in ubifs_wbuf_write_nolock()
724 wbuf->offs, wbuf->size); in ubifs_wbuf_write_nolock()
728 spin_lock(&wbuf->lock); in ubifs_wbuf_write_nolock()
729 wbuf->offs += wbuf->size; in ubifs_wbuf_write_nolock()
730 if (c->leb_size - wbuf->offs >= c->max_write_size) in ubifs_wbuf_write_nolock()
731 wbuf->size = c->max_write_size; in ubifs_wbuf_write_nolock()
733 wbuf->size = c->leb_size - wbuf->offs; in ubifs_wbuf_write_nolock()
734 wbuf->avail = wbuf->size; in ubifs_wbuf_write_nolock()
735 wbuf->used = 0; in ubifs_wbuf_write_nolock()
736 wbuf->next_ino = 0; in ubifs_wbuf_write_nolock()
737 spin_unlock(&wbuf->lock); in ubifs_wbuf_write_nolock()
739 spin_lock(&wbuf->lock); in ubifs_wbuf_write_nolock()
740 wbuf->avail -= aligned_len; in ubifs_wbuf_write_nolock()
741 wbuf->used += aligned_len; in ubifs_wbuf_write_nolock()
742 spin_unlock(&wbuf->lock); in ubifs_wbuf_write_nolock()
750 if (wbuf->used) { in ubifs_wbuf_write_nolock()
756 dbg_io("flush jhead %s wbuf to LEB %d:%d", in ubifs_wbuf_write_nolock()
757 dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs); in ubifs_wbuf_write_nolock()
758 memcpy(wbuf->buf + wbuf->used, buf, wbuf->avail); in ubifs_wbuf_write_nolock()
759 err = ubifs_leb_write(c, wbuf->lnum, wbuf->buf, wbuf->offs, in ubifs_wbuf_write_nolock()
760 wbuf->size); in ubifs_wbuf_write_nolock()
764 wbuf->offs += wbuf->size; in ubifs_wbuf_write_nolock()
765 len -= wbuf->avail; in ubifs_wbuf_write_nolock()
766 aligned_len -= wbuf->avail; in ubifs_wbuf_write_nolock()
767 written += wbuf->avail; in ubifs_wbuf_write_nolock()
768 } else if (wbuf->offs & (c->max_write_size - 1)) { in ubifs_wbuf_write_nolock()
771 * @c->max_write_size and @wbuf->size is less than in ubifs_wbuf_write_nolock()
772 * @c->max_write_size. Write @wbuf->size bytes to make sure the in ubifs_wbuf_write_nolock()
777 wbuf->size, wbuf->lnum, wbuf->offs); in ubifs_wbuf_write_nolock()
778 err = ubifs_leb_write(c, wbuf->lnum, buf, wbuf->offs, in ubifs_wbuf_write_nolock()
779 wbuf->size); in ubifs_wbuf_write_nolock()
783 wbuf->offs += wbuf->size; in ubifs_wbuf_write_nolock()
784 len -= wbuf->size; in ubifs_wbuf_write_nolock()
785 aligned_len -= wbuf->size; in ubifs_wbuf_write_nolock()
786 written += wbuf->size; in ubifs_wbuf_write_nolock()
792 * We align node length to 8-byte boundary because we anyway flash wbuf in ubifs_wbuf_write_nolock()
798 dbg_io("write %d bytes to LEB %d:%d", n, wbuf->lnum, in ubifs_wbuf_write_nolock()
799 wbuf->offs); in ubifs_wbuf_write_nolock()
800 err = ubifs_leb_write(c, wbuf->lnum, buf + written, in ubifs_wbuf_write_nolock()
801 wbuf->offs, n); in ubifs_wbuf_write_nolock()
804 wbuf->offs += n; in ubifs_wbuf_write_nolock()
810 spin_lock(&wbuf->lock); in ubifs_wbuf_write_nolock()
817 memcpy(wbuf->buf, buf + written, len); in ubifs_wbuf_write_nolock()
819 if (c->leb_size - wbuf->offs >= c->max_write_size) in ubifs_wbuf_write_nolock()
820 wbuf->size = c->max_write_size; in ubifs_wbuf_write_nolock()
822 wbuf->size = c->leb_size - wbuf->offs; in ubifs_wbuf_write_nolock()
823 wbuf->avail = wbuf->size - aligned_len; in ubifs_wbuf_write_nolock()
824 wbuf->used = aligned_len; in ubifs_wbuf_write_nolock()
825 wbuf->next_ino = 0; in ubifs_wbuf_write_nolock()
826 spin_unlock(&wbuf->lock); in ubifs_wbuf_write_nolock()
829 if (wbuf->sync_callback) { in ubifs_wbuf_write_nolock()
830 int free = c->leb_size - wbuf->offs - wbuf->used; in ubifs_wbuf_write_nolock()
832 err = wbuf->sync_callback(c, wbuf->lnum, free, 0); in ubifs_wbuf_write_nolock()
837 if (wbuf->used) in ubifs_wbuf_write_nolock()
838 new_wbuf_timer_nolock(wbuf); in ubifs_wbuf_write_nolock()
844 len, wbuf->lnum, wbuf->offs, err); in ubifs_wbuf_write_nolock()
847 ubifs_dump_leb(c, wbuf->lnum); in ubifs_wbuf_write_nolock()
892 * @wbuf: wbuf to check for un-written data
905 int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len, in ubifs_read_node_wbuf() argument
908 const struct ubifs_info *c = wbuf->c; in ubifs_read_node_wbuf()
913 dbg_ntype(type), len, dbg_jhead(wbuf->jhead)); in ubifs_read_node_wbuf()
914 ubifs_assert(wbuf && lnum >= 0 && lnum < c->leb_cnt && offs >= 0); in ubifs_read_node_wbuf()
918 spin_lock(&wbuf->lock); in ubifs_read_node_wbuf()
919 overlap = (lnum == wbuf->lnum && offs + len > wbuf->offs); in ubifs_read_node_wbuf()
922 spin_unlock(&wbuf->lock); in ubifs_read_node_wbuf()
926 /* Don't read under wbuf */ in ubifs_read_node_wbuf()
927 rlen = wbuf->offs - offs; in ubifs_read_node_wbuf()
932 memcpy(buf + rlen, wbuf->buf + offs + rlen - wbuf->offs, len - rlen); in ubifs_read_node_wbuf()
933 spin_unlock(&wbuf->lock); in ubifs_read_node_wbuf()
1031 * @wbuf: write-buffer to initialize
1036 int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf) in ubifs_wbuf_init() argument
1040 wbuf->buf = kmalloc(c->max_write_size, GFP_KERNEL); in ubifs_wbuf_init()
1041 if (!wbuf->buf) in ubifs_wbuf_init()
1045 wbuf->inodes = kmalloc(size, GFP_KERNEL); in ubifs_wbuf_init()
1046 if (!wbuf->inodes) { in ubifs_wbuf_init()
1047 kfree(wbuf->buf); in ubifs_wbuf_init()
1048 wbuf->buf = NULL; in ubifs_wbuf_init()
1052 wbuf->used = 0; in ubifs_wbuf_init()
1053 wbuf->lnum = wbuf->offs = -1; in ubifs_wbuf_init()
1061 wbuf->avail = wbuf->size = size; in ubifs_wbuf_init()
1062 wbuf->sync_callback = NULL; in ubifs_wbuf_init()
1063 mutex_init(&wbuf->io_mutex); in ubifs_wbuf_init()
1064 spin_lock_init(&wbuf->lock); in ubifs_wbuf_init()
1065 wbuf->c = c; in ubifs_wbuf_init()
1066 wbuf->next_ino = 0; in ubifs_wbuf_init()
1069 hrtimer_init(&wbuf->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); in ubifs_wbuf_init()
1070 wbuf->timer.function = wbuf_timer_callback_nolock; in ubifs_wbuf_init()
1071 wbuf->softlimit = ktime_set(WBUF_TIMEOUT_SOFTLIMIT, 0); in ubifs_wbuf_init()
1072 wbuf->delta = WBUF_TIMEOUT_HARDLIMIT - WBUF_TIMEOUT_SOFTLIMIT; in ubifs_wbuf_init()
1073 wbuf->delta *= 1000000000ULL; in ubifs_wbuf_init()
1074 ubifs_assert(wbuf->delta <= ULONG_MAX); in ubifs_wbuf_init()
1080 * ubifs_wbuf_add_ino_nolock - add an inode number into the wbuf inode array.
1081 * @wbuf: the write-buffer where to add
1086 void ubifs_wbuf_add_ino_nolock(struct ubifs_wbuf *wbuf, ino_t inum) in ubifs_wbuf_add_ino_nolock() argument
1088 if (!wbuf->buf) in ubifs_wbuf_add_ino_nolock()
1092 spin_lock(&wbuf->lock); in ubifs_wbuf_add_ino_nolock()
1093 if (wbuf->used) in ubifs_wbuf_add_ino_nolock()
1094 wbuf->inodes[wbuf->next_ino++] = inum; in ubifs_wbuf_add_ino_nolock()
1095 spin_unlock(&wbuf->lock); in ubifs_wbuf_add_ino_nolock()
1099 * wbuf_has_ino - returns if the wbuf contains data from the inode.
1100 * @wbuf: the write-buffer
1106 static int wbuf_has_ino(struct ubifs_wbuf *wbuf, ino_t inum) in wbuf_has_ino() argument
1110 spin_lock(&wbuf->lock); in wbuf_has_ino()
1111 for (i = 0; i < wbuf->next_ino; i++) in wbuf_has_ino()
1112 if (inum == wbuf->inodes[i]) { in wbuf_has_ino()
1116 spin_unlock(&wbuf->lock); in wbuf_has_ino()
1135 struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf; in ubifs_sync_wbufs_by_inode() local
1146 if (!wbuf_has_ino(wbuf, inode->i_ino)) in ubifs_sync_wbufs_by_inode()
1149 mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead); in ubifs_sync_wbufs_by_inode()
1150 if (wbuf_has_ino(wbuf, inode->i_ino)) in ubifs_sync_wbufs_by_inode()
1151 err = ubifs_wbuf_sync_nolock(wbuf); in ubifs_sync_wbufs_by_inode()
1152 mutex_unlock(&wbuf->io_mutex); in ubifs_sync_wbufs_by_inode()