diff options
Diffstat (limited to 'sys/fs/nandfs/nandfs_segment.c')
| -rw-r--r-- | sys/fs/nandfs/nandfs_segment.c | 1329 |
1 files changed, 1329 insertions, 0 deletions
diff --git a/sys/fs/nandfs/nandfs_segment.c b/sys/fs/nandfs/nandfs_segment.c new file mode 100644 index 0000000..836bead --- /dev/null +++ b/sys/fs/nandfs/nandfs_segment.c @@ -0,0 +1,1329 @@ +/*- + * Copyright (c) 2010-2012 Semihalf. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_ddb.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mount.h> +#include <sys/mutex.h> +#include <sys/namei.h> +#include <sys/sysctl.h> +#include <sys/vnode.h> +#include <sys/buf.h> +#include <sys/bio.h> +#include <sys/libkern.h> + +#include <ddb/ddb.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/vm_kern.h> +#include <vm/vm_page.h> + +#include <geom/geom.h> +#include <geom/geom_vfs.h> + +#include <fs/nandfs/nandfs_mount.h> +#include <fs/nandfs/nandfs.h> +#include <fs/nandfs/nandfs_subr.h> + +static int +nandfs_new_segment(struct nandfs_device *fsdev) +{ + int error = 0; + uint64_t new; + + error = nandfs_alloc_segment(fsdev, &new); + if (!error) { + fsdev->nd_seg_num = fsdev->nd_next_seg_num; + fsdev->nd_next_seg_num = new; + } + DPRINTF(SYNC, ("%s: new segment %jx next %jx error %d\n", + __func__, (uintmax_t)fsdev->nd_seg_num, (uintmax_t)new, error)); + if (error) + nandfs_error("%s: cannot create segment error %d\n", + __func__, error); + + return (error); +} + +static int +create_segment(struct nandfs_seginfo *seginfo) +{ + struct nandfs_segment *seg; + struct nandfs_device *fsdev; + struct nandfs_segment *prev; + struct buf *bp; + uint64_t start_block, curr; + uint32_t blks_per_seg, nblocks; + int error; + + fsdev = seginfo->fsdev; + prev = seginfo->curseg; + blks_per_seg = fsdev->nd_fsdata.f_blocks_per_segment; + nblocks = fsdev->nd_last_segsum.ss_nblocks; + + if (!prev) { + vfs_timestamp(&fsdev->nd_ts); + /* Touch current segment */ + error = nandfs_touch_segment(fsdev, fsdev->nd_seg_num); + if (error) { + nandfs_error("%s: cannot preallocate segment %jx\n", + __func__, fsdev->nd_seg_num); + return (error); + } + error = nandfs_touch_segment(fsdev, 0); + if (error) { + nandfs_error("%s: cannot dirty block with segment 0\n", + __func__); + return (error); + } + start_block = fsdev->nd_last_pseg + (uint64_t)nblocks; + /* + * XXX Hack + */ + if (blks_per_seg - (start_block % blks_per_seg) - 1 == 0) + start_block++; + curr = nandfs_get_segnum_of_block(fsdev, start_block); + /* Allocate new segment if last one is full */ + if (fsdev->nd_seg_num != curr) { + error = nandfs_new_segment(fsdev); + if (error) { + nandfs_error("%s: cannot create new segment\n", + __func__); + return (error); + } + /* + * XXX Hack + */ + nandfs_get_segment_range(fsdev, fsdev->nd_seg_num, &start_block, NULL); + } + } else { + nandfs_get_segment_range(fsdev, fsdev->nd_next_seg_num, + &start_block, NULL); + + /* Touch current segment and allocate and touch new one */ + error = nandfs_new_segment(fsdev); + if (error) { + nandfs_error("%s: cannot create next segment\n", + __func__); + return (error); + } + + /* Reiterate in case new buf is dirty */ + seginfo->reiterate = 1; + } + + /* Allocate and initialize nandfs_segment structure */ + seg = malloc(sizeof(*seg), M_DEVBUF, M_WAITOK|M_ZERO); + TAILQ_INIT(&seg->segsum); + TAILQ_INIT(&seg->data); + seg->fsdev = fsdev; + seg->start_block = start_block; + seg->num_blocks = blks_per_seg - (start_block % blks_per_seg) - 1; + seg->seg_num = fsdev->nd_seg_num; + seg->seg_next = fsdev->nd_next_seg_num; + seg->segsum_blocks = 1; + seg->bytes_left = fsdev->nd_blocksize - + sizeof(struct nandfs_segment_summary); + seg->segsum_bytes = sizeof(struct nandfs_segment_summary); + + /* Allocate buffer for segment summary */ + bp = getblk(fsdev->nd_devvp, nandfs_block_to_dblock(fsdev, + seg->start_block), fsdev->nd_blocksize, 0, 0, 0); + bzero(bp->b_data, seginfo->fsdev->nd_blocksize); + bp->b_bufobj = &seginfo->fsdev->nd_devvp->v_bufobj; + bp->b_flags |= B_MANAGED; + + /* Add buffer to segment */ + TAILQ_INSERT_TAIL(&seg->segsum, bp, b_cluster.cluster_entry); + seg->current_off = bp->b_data + sizeof(struct nandfs_segment_summary); + + DPRINTF(SYNC, ("%s: seg %p : initial settings: start %#jx size :%#x\n", + __func__, seg, (uintmax_t)seg->start_block, seg->num_blocks)); + DPRINTF(SYNC, ("%s: seg->seg_num %#jx cno %#jx next %#jx\n", __func__, + (uintmax_t)seg->seg_num, (uintmax_t)(fsdev->nd_last_cno + 1), + (uintmax_t)seg->seg_next)); + + if (!prev) + LIST_INSERT_HEAD(&seginfo->seg_list, seg, seg_link); + else + LIST_INSERT_AFTER(prev, seg, seg_link); + + seginfo->curseg = seg; + + return (0); +} + +static int +delete_segment(struct nandfs_seginfo *seginfo) +{ + struct nandfs_segment *seg, *tseg; + struct buf *bp, *tbp; + + LIST_FOREACH_SAFE(seg, &seginfo->seg_list, seg_link, tseg) { + TAILQ_FOREACH_SAFE(bp, &seg->segsum, b_cluster.cluster_entry, + tbp) { + TAILQ_REMOVE(&seg->segsum, bp, b_cluster.cluster_entry); + bp->b_flags &= ~B_MANAGED; + brelse(bp); + }; + + LIST_REMOVE(seg, seg_link); + free(seg, M_DEVBUF); + } + + return (0); +} + +static int +create_seginfo(struct nandfs_device *fsdev, struct nandfs_seginfo **seginfo) +{ + struct nandfs_seginfo *info; + + info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK); + + LIST_INIT(&info->seg_list); + info->fsdev = fsdev; + info->curseg = NULL; + info->blocks = 0; + *seginfo = info; + fsdev->nd_seginfo = info; + return (0); +} + +static int +delete_seginfo(struct nandfs_seginfo *seginfo) +{ + struct nandfs_device *nffsdev; + + nffsdev = seginfo->fsdev; + delete_segment(seginfo); + nffsdev->nd_seginfo = NULL; + free(seginfo, M_DEVBUF); + + return (0); +} + +static int +nandfs_create_superroot_block(struct nandfs_seginfo *seginfo, + struct buf **newbp) +{ + struct buf *bp; + int error; + + bp = nandfs_geteblk(seginfo->fsdev->nd_blocksize, GB_NOWAIT_BD); + + bzero(bp->b_data, seginfo->fsdev->nd_blocksize); + bp->b_bufobj = &seginfo->fsdev->nd_devvp->v_bufobj; + bp->b_flags |= B_MANAGED; + + if (!(seginfo->curseg) || !seginfo->curseg->num_blocks) { + error = create_segment(seginfo); + if (error) { + brelse(bp); + nandfs_error("%s: no segment for superroot\n", + __func__); + return (error); + } + } + + TAILQ_INSERT_TAIL(&seginfo->curseg->data, bp, b_cluster.cluster_entry); + + seginfo->curseg->nblocks++; + seginfo->curseg->num_blocks--; + seginfo->blocks++; + + *newbp = bp; + return (0); +} + +static int +nandfs_add_superroot(struct nandfs_seginfo *seginfo) +{ + struct nandfs_device *fsdev; + struct nandfs_super_root *sr; + struct buf *bp = NULL; + uint64_t crc_skip; + uint32_t crc_calc; + int error; + + fsdev = seginfo->fsdev; + + error = nandfs_create_superroot_block(seginfo, &bp); + if (error) { + nandfs_error("%s: cannot add superroot\n", __func__); + return (error); + } + + sr = (struct nandfs_super_root *)bp->b_data; + /* Save superroot CRC */ + sr->sr_bytes = NANDFS_SR_BYTES; + sr->sr_flags = 0; + sr->sr_nongc_ctime = 0; + + memcpy(&sr->sr_dat, &fsdev->nd_dat_node->nn_inode, + sizeof(struct nandfs_inode)); + memcpy(&sr->sr_cpfile, &fsdev->nd_cp_node->nn_inode, + sizeof(struct nandfs_inode)); + memcpy(&sr->sr_sufile, &fsdev->nd_su_node->nn_inode, + sizeof(struct nandfs_inode)); + + crc_skip = sizeof(sr->sr_sum); + crc_calc = crc32((uint8_t *)sr + crc_skip, NANDFS_SR_BYTES - crc_skip); + + sr->sr_sum = crc_calc; + + bp->b_flags |= B_MANAGED; + bp->b_bufobj = &seginfo->fsdev->nd_devvp->v_bufobj; + + bp->b_flags &= ~B_INVAL; + nandfs_dirty_bufs_increment(fsdev); + DPRINTF(SYNC, ("%s: bp:%p\n", __func__, bp)); + + return (0); +} + +static int +nandfs_add_segsum_block(struct nandfs_seginfo *seginfo, struct buf **newbp) +{ + struct nandfs_device *fsdev; + nandfs_daddr_t blk; + struct buf *bp; + int error; + + if (!(seginfo->curseg) || seginfo->curseg->num_blocks <= 1) { + error = create_segment(seginfo); + if (error) { + nandfs_error("%s: error:%d when creating segment\n", + __func__, error); + return (error); + } + *newbp = TAILQ_FIRST(&seginfo->curseg->segsum); + return (0); + } + + fsdev = seginfo->fsdev; + blk = nandfs_block_to_dblock(fsdev, seginfo->curseg->start_block + + seginfo->curseg->segsum_blocks); + + bp = getblk(fsdev->nd_devvp, blk, fsdev->nd_blocksize, 0, 0, 0); + + bzero(bp->b_data, seginfo->fsdev->nd_blocksize); + bp->b_bufobj = &seginfo->fsdev->nd_devvp->v_bufobj; + bp->b_flags |= B_MANAGED; + + TAILQ_INSERT_TAIL(&seginfo->curseg->segsum, bp, + b_cluster.cluster_entry); + seginfo->curseg->num_blocks--; + + seginfo->curseg->segsum_blocks++; + seginfo->curseg->bytes_left = seginfo->fsdev->nd_blocksize; + seginfo->curseg->current_off = bp->b_data; + seginfo->blocks++; + + *newbp = bp; + + DPRINTF(SYNC, ("%s: bp %p\n", __func__, bp)); + + return (0); +} + +static int +nandfs_add_blocks(struct nandfs_seginfo *seginfo, struct nandfs_node *node, + struct buf *bp) +{ + union nandfs_binfo *binfo; + struct buf *seg_bp; + int error; + + if (!(seginfo->curseg) || !seginfo->curseg->num_blocks) { + error = create_segment(seginfo); + if (error) { + nandfs_error("%s: error:%d when creating segment\n", + __func__, error); + return (error); + } + } + + if (seginfo->curseg->bytes_left < sizeof(union nandfs_binfo)) { + error = nandfs_add_segsum_block(seginfo, &seg_bp); + if (error) { + nandfs_error("%s: error:%d when adding segsum\n", + __func__, error); + return (error); + } + } + binfo = (union nandfs_binfo *)seginfo->curseg->current_off; + + if (node->nn_ino != NANDFS_DAT_INO) { + binfo->bi_v.bi_blkoff = bp->b_lblkno; + binfo->bi_v.bi_ino = node->nn_ino; + } else { + binfo->bi_dat.bi_blkoff = bp->b_lblkno; + binfo->bi_dat.bi_ino = node->nn_ino; + if (NANDFS_IS_INDIRECT(bp)) + binfo->bi_dat.bi_level = 1; + else + binfo->bi_dat.bi_level = 0; + } + binfo++; + + seginfo->curseg->bytes_left -= sizeof(union nandfs_binfo); + seginfo->curseg->segsum_bytes += sizeof(union nandfs_binfo); + seginfo->curseg->current_off = (char *)binfo; + + TAILQ_INSERT_TAIL(&seginfo->curseg->data, bp, b_cluster.cluster_entry); + + seginfo->curseg->nbinfos++; + seginfo->curseg->nblocks++; + seginfo->curseg->num_blocks--; + seginfo->blocks++; + + DPRINTF(SYNC, ("%s: bp (%p) number %x (left %x)\n", + __func__, bp, seginfo->curseg->nblocks, + seginfo->curseg->num_blocks)); + return (0); +} + +static int +nandfs_iterate_dirty_buf(struct vnode *vp, struct nandfs_seginfo *seginfo, + uint8_t hold) +{ + struct buf *bp, *tbd; + struct bufobj *bo; + struct nandfs_node *node; + int error; + + node = VTON(vp); + bo = &vp->v_bufobj; + + ASSERT_VOP_ELOCKED(vp, __func__); + + /* Iterate dirty data bufs */ + TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, tbd) { + DPRINTF(SYNC, ("%s: vp (%p): bp (%p) with lblkno %jx ino %jx " + "add buf\n", __func__, vp, bp, bp->b_lblkno, node->nn_ino)); + + if (!(NANDFS_ISGATHERED(bp))) { + error = nandfs_bmap_update_dat(node, + nandfs_vblk_get(bp), bp); + if (error) + return (error); + NANDFS_GATHER(bp); + nandfs_add_blocks(seginfo, node, bp); + } + } + + return (0); +} + +static int +nandfs_iterate_system_vnode(struct nandfs_node *node, + struct nandfs_seginfo *seginfo) +{ + struct vnode *vp; + int nblocks; + uint8_t hold = 0; + + if (node->nn_ino != NANDFS_IFILE_INO) + hold = 1; + + vp = NTOV(node); + + nblocks = vp->v_bufobj.bo_dirty.bv_cnt; + DPRINTF(SYNC, ("%s: vp (%p): nblocks %x ino %jx\n", + __func__, vp, nblocks, node->nn_ino)); + + if (nblocks) + nandfs_iterate_dirty_buf(vp, seginfo, hold); + + return (0); +} + +static int +nandfs_iterate_dirty_vnodes(struct mount *mp, struct nandfs_seginfo *seginfo) +{ + struct nandfs_node *nandfs_node; + struct vnode *vp, *mvp; + struct thread *td; + int error, lockreq, update; + + td = curthread; + lockreq = LK_EXCLUSIVE | LK_INTERLOCK | LK_RETRY; + + MNT_ILOCK(mp); + + MNT_VNODE_FOREACH(vp, mp, mvp) { + update = 0; + + if (mp->mnt_syncer == vp) + continue; + if (VOP_ISLOCKED(vp)) + continue; + + VI_LOCK(vp); + MNT_IUNLOCK(mp); + if (vp->v_iflag & VI_DOOMED) { + VI_UNLOCK(vp); + MNT_ILOCK(mp); + continue; + } + + if ((error = vget(vp, lockreq, td)) != 0) { + MNT_ILOCK(mp); + continue; + } + + if (vp->v_iflag & VI_DOOMED) { + vput(vp); + MNT_ILOCK(mp); + continue; + } + + nandfs_node = VTON(vp); + if (nandfs_node->nn_flags & IN_MODIFIED) { + nandfs_node->nn_flags &= ~(IN_MODIFIED); + update = 1; + } + + if (vp->v_bufobj.bo_dirty.bv_cnt) { + error = nandfs_iterate_dirty_buf(vp, seginfo, 0); + if (error) { + nandfs_error("%s: cannot iterate vnode:%p " + "err:%d\n", __func__, vp, error); + vput(vp); + return (error); + } + update = 1; + } else + vput(vp); + + if (update) + nandfs_node_update(nandfs_node); + + MNT_ILOCK(mp); + } + + MNT_IUNLOCK(mp); + + return (0); +} + +static int +nandfs_update_phys_block(struct nandfs_device *fsdev, struct buf *bp, + uint64_t phys_blknr, union nandfs_binfo *binfo) +{ + struct nandfs_node *node, *dat; + struct vnode *vp; + uint64_t new_blknr; + int error; + + vp = bp->b_vp; + node = VTON(vp); + new_blknr = nandfs_vblk_get(bp); + dat = fsdev->nd_dat_node; + + DPRINTF(BMAP, ("%s: ino %#jx lblk %#jx: vblk %#jx -> %#jx\n", + __func__, (uintmax_t)node->nn_ino, (uintmax_t)bp->b_lblkno, + (uintmax_t)new_blknr, (uintmax_t)phys_blknr)); + + if (node->nn_ino != NANDFS_DAT_INO) { + KASSERT((new_blknr != 0), ("vblk for bp %p is 0", bp)); + + nandfs_vblock_assign(fsdev, new_blknr, phys_blknr); + binfo->bi_v.bi_vblocknr = new_blknr; + binfo->bi_v.bi_blkoff = bp->b_lblkno; + binfo->bi_v.bi_ino = node->nn_ino; + } else { + VOP_LOCK(NTOV(dat), LK_EXCLUSIVE); + error = nandfs_bmap_update_block(node, bp, phys_blknr); + if (error) { + nandfs_error("%s: error updating block:%jx for bp:%p\n", + __func__, (uintmax_t)phys_blknr, bp); + VOP_UNLOCK(NTOV(dat), 0); + return (error); + } + VOP_UNLOCK(NTOV(dat), 0); + binfo->bi_dat.bi_blkoff = bp->b_lblkno; + binfo->bi_dat.bi_ino = node->nn_ino; + if (NANDFS_IS_INDIRECT(bp)) + binfo->bi_dat.bi_level = 1; + else + binfo->bi_dat.bi_level = 0; + } + + return (0); +} + +#define NBINFO(off) ((off) + sizeof(union nandfs_binfo)) +static int +nandfs_segment_assign_pblk(struct nandfs_segment *nfsseg) +{ + struct nandfs_device *fsdev; + union nandfs_binfo *binfo; + struct buf *bp, *seg_bp; + uint64_t blocknr; + uint32_t curr_off, blocksize; + int error; + + fsdev = nfsseg->fsdev; + blocksize = fsdev->nd_blocksize; + + blocknr = nfsseg->start_block + nfsseg->segsum_blocks; + seg_bp = TAILQ_FIRST(&nfsseg->segsum); + DPRINTF(SYNC, ("%s: seg:%p segsum bp:%p data:%p\n", + __func__, nfsseg, seg_bp, seg_bp->b_data)); + + binfo = (union nandfs_binfo *)(seg_bp->b_data + + sizeof(struct nandfs_segment_summary)); + curr_off = sizeof(struct nandfs_segment_summary); + + TAILQ_FOREACH(bp, &nfsseg->data, b_cluster.cluster_entry) { + KASSERT((bp->b_vp), ("bp %p has not vp", bp)); + + DPRINTF(BMAP, ("\n\n%s: assign buf %p for ino %#jx next %p\n", + __func__, bp, (uintmax_t)VTON(bp->b_vp)->nn_ino, + TAILQ_NEXT(bp, b_cluster.cluster_entry))); + + if (NBINFO(curr_off) > blocksize) { + seg_bp = TAILQ_NEXT(seg_bp, b_cluster.cluster_entry); + binfo = (union nandfs_binfo *)seg_bp->b_data; + curr_off = 0; + DPRINTF(SYNC, ("%s: next segsum %p data %p\n", + __func__, seg_bp, seg_bp->b_data)); + } + + error = nandfs_update_phys_block(fsdev, bp, blocknr, binfo); + if (error) { + nandfs_error("%s: err:%d when updatinng phys block:%jx" + " for bp:%p and binfo:%p\n", __func__, error, + (uintmax_t)blocknr, bp, binfo); + return (error); + } + binfo++; + curr_off = NBINFO(curr_off); + + blocknr++; + } + + return (0); +} + +static int +nandfs_seginfo_assign_pblk(struct nandfs_seginfo *seginfo) +{ + struct nandfs_segment *nfsseg; + int error = 0; + + LIST_FOREACH(nfsseg, &seginfo->seg_list, seg_link) { + error = nandfs_segment_assign_pblk(nfsseg); + if (error) + break; + } + + return (error); +} + +static struct nandfs_segment_summary * +nandfs_fill_segsum(struct nandfs_segment *seg, int has_sr) +{ + struct nandfs_segment_summary *ss; + struct nandfs_device *fsdev; + struct buf *bp; + uint32_t rest, segsum_size, blocksize, crc_calc; + uint16_t flags; + uint8_t *crc_area, crc_skip; + + DPRINTF(SYNC, ("%s: seg %#jx nblocks %#x sumbytes %#x\n", + __func__, (uintmax_t) seg->seg_num, + seg->nblocks + seg->segsum_blocks, + seg->segsum_bytes)); + + fsdev = seg->fsdev; + + flags = NANDFS_SS_LOGBGN | NANDFS_SS_LOGEND; + if (has_sr) + flags |= NANDFS_SS_SR; + + bp = TAILQ_FIRST(&seg->segsum); + ss = (struct nandfs_segment_summary *) bp->b_data; + ss->ss_magic = NANDFS_SEGSUM_MAGIC; + ss->ss_bytes = sizeof(struct nandfs_segment_summary); + ss->ss_flags = flags; + ss->ss_seq = ++(fsdev->nd_seg_sequence); + ss->ss_create = fsdev->nd_ts.tv_sec; + nandfs_get_segment_range(fsdev, seg->seg_next, &ss->ss_next, NULL); + ss->ss_nblocks = seg->nblocks + seg->segsum_blocks; + ss->ss_nbinfos = seg->nbinfos; + ss->ss_sumbytes = seg->segsum_bytes; + + crc_skip = sizeof(ss->ss_datasum) + sizeof(ss->ss_sumsum); + blocksize = seg->fsdev->nd_blocksize; + + segsum_size = seg->segsum_bytes - crc_skip; + rest = min(seg->segsum_bytes, blocksize) - crc_skip; + crc_area = (uint8_t *)ss + crc_skip; + crc_calc = ~0U; + while (segsum_size > 0) { + crc_calc = crc32_raw(crc_area, rest, crc_calc); + segsum_size -= rest; + if (!segsum_size) + break; + bp = TAILQ_NEXT(bp, b_cluster.cluster_entry); + crc_area = (uint8_t *)bp->b_data; + rest = segsum_size <= blocksize ? segsum_size : blocksize; + } + ss->ss_sumsum = crc_calc ^ ~0U; + + return (ss); + +} + +static int +nandfs_save_buf(struct buf *bp, uint64_t blocknr, struct nandfs_device *fsdev) +{ + struct bufobj *bo; + int error; + + bo = &fsdev->nd_devvp->v_bufobj; + + bp->b_blkno = nandfs_block_to_dblock(fsdev, blocknr); + bp->b_iooffset = dbtob(bp->b_blkno); + + KASSERT(bp->b_bufobj != NULL, ("no bufobj for %p", bp)); + if (bp->b_bufobj != bo) { + BO_LOCK(bp->b_bufobj); + BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, + BO_MTX(bp->b_bufobj)); + KASSERT(BUF_ISLOCKED(bp), ("Problem with locking buffer")); + } + + DPRINTF(SYNC, ("%s: buf: %p offset %#jx blk %#jx size %#x\n", + __func__, bp, (uintmax_t)bp->b_offset, (uintmax_t)blocknr, + fsdev->nd_blocksize)); + + NANDFS_UNGATHER(bp); + nandfs_buf_clear(bp, 0xffffffff); + bp->b_flags &= ~(B_ASYNC|B_INVAL|B_MANAGED); + error = bwrite(bp); + if (error) { + nandfs_error("%s: error:%d when writing buffer:%p\n", + __func__, error, bp); + return (error); + } + return (error); +} + +static void +nandfs_clean_buf(struct nandfs_device *fsdev, struct buf *bp) +{ + + DPRINTF(SYNC, ("%s: buf: %p\n", __func__, bp)); + + NANDFS_UNGATHER(bp); + nandfs_buf_clear(bp, 0xffffffff); + bp->b_flags &= ~(B_ASYNC|B_INVAL|B_MANAGED); + nandfs_undirty_buf_fsdev(fsdev, bp); +} + +static void +nandfs_clean_segblocks(struct nandfs_segment *seg, uint8_t unlock) +{ + struct nandfs_device *fsdev = seg->fsdev; + struct nandfs_segment *next_seg; + struct buf *bp, *tbp, *next_bp; + struct vnode *vp, *next_vp; + + VOP_LOCK(fsdev->nd_devvp, LK_EXCLUSIVE); + TAILQ_FOREACH_SAFE(bp, &seg->segsum, b_cluster.cluster_entry, tbp) { + TAILQ_REMOVE(&seg->segsum, bp, b_cluster.cluster_entry); + nandfs_clean_buf(fsdev, bp); + }; + + TAILQ_FOREACH_SAFE(bp, &seg->data, b_cluster.cluster_entry, tbp) { + TAILQ_REMOVE(&seg->data, bp, b_cluster.cluster_entry); + + /* + * If bp is not super-root and vnode is not currently + * locked lock it. + */ + vp = bp->b_vp; + next_vp = NULL; + next_bp = TAILQ_NEXT(bp, b_cluster.cluster_entry); + if (!next_bp) { + next_seg = LIST_NEXT(seg, seg_link); + if (next_seg) + next_bp = TAILQ_FIRST(&next_seg->data); + } + + if (next_bp) + next_vp = next_bp->b_vp; + + nandfs_clean_buf(fsdev, bp); + + if (unlock && vp != NULL && next_vp != vp && + !NANDFS_SYS_NODE(VTON(vp)->nn_ino)) + vput(vp); + + nandfs_dirty_bufs_decrement(fsdev); + } + + VOP_UNLOCK(fsdev->nd_devvp, 0); +} + +static int +nandfs_save_segblocks(struct nandfs_segment *seg, uint8_t unlock) +{ + struct nandfs_device *fsdev = seg->fsdev; + struct nandfs_segment *next_seg; + struct buf *bp, *tbp, *next_bp; + struct vnode *vp, *next_vp; + uint64_t blocknr; + uint32_t i = 0; + int error = 0; + + VOP_LOCK(fsdev->nd_devvp, LK_EXCLUSIVE); + TAILQ_FOREACH_SAFE(bp, &seg->segsum, b_cluster.cluster_entry, tbp) { + TAILQ_REMOVE(&seg->segsum, bp, b_cluster.cluster_entry); + blocknr = seg->start_block + i; + error = nandfs_save_buf(bp, blocknr, fsdev); + if (error) { + nandfs_error("%s: error saving buf: %p blocknr:%jx\n", + __func__, bp, (uintmax_t)blocknr); + goto out; + } + i++; + }; + + i = 0; + TAILQ_FOREACH_SAFE(bp, &seg->data, b_cluster.cluster_entry, tbp) { + TAILQ_REMOVE(&seg->data, bp, b_cluster.cluster_entry); + + blocknr = seg->start_block + seg->segsum_blocks + i; + /* + * If bp is not super-root and vnode is not currently + * locked lock it. + */ + vp = bp->b_vp; + next_vp = NULL; + next_bp = TAILQ_NEXT(bp, b_cluster.cluster_entry); + if (!next_bp) { + next_seg = LIST_NEXT(seg, seg_link); + if (next_seg) + next_bp = TAILQ_FIRST(&next_seg->data); + } + + if (next_bp) + next_vp = next_bp->b_vp; + + error = nandfs_save_buf(bp, blocknr, fsdev); + if (error) { + nandfs_error("%s: error saving buf: %p blknr: %jx\n", + __func__, bp, (uintmax_t)blocknr); + if (unlock && vp != NULL && next_vp != vp && + !NANDFS_SYS_NODE(VTON(vp)->nn_ino)) + vput(vp); + goto out; + } + + if (unlock && vp != NULL && next_vp != vp && + !NANDFS_SYS_NODE(VTON(vp)->nn_ino)) + vput(vp); + + i++; + nandfs_dirty_bufs_decrement(fsdev); + } +out: + if (error) { + nandfs_clean_segblocks(seg, unlock); + VOP_UNLOCK(fsdev->nd_devvp, 0); + return (error); + } + + VOP_UNLOCK(fsdev->nd_devvp, 0); + return (error); +} + + +static void +clean_seginfo(struct nandfs_seginfo *seginfo, uint8_t unlock) +{ + struct nandfs_segment *seg; + + DPRINTF(SYNC, ("%s: seginfo %p\n", __func__, seginfo)); + + LIST_FOREACH(seg, &seginfo->seg_list, seg_link) { + nandfs_clean_segblocks(seg, unlock); + } +} + +static int +save_seginfo(struct nandfs_seginfo *seginfo, uint8_t unlock) +{ + struct nandfs_segment *seg; + struct nandfs_device *fsdev; + struct nandfs_segment_summary *ss; + int error = 0; + + fsdev = seginfo->fsdev; + + DPRINTF(SYNC, ("%s: seginfo %p\n", __func__, seginfo)); + + LIST_FOREACH(seg, &seginfo->seg_list, seg_link) { + if (LIST_NEXT(seg, seg_link)) { + nandfs_fill_segsum(seg, 0); + error = nandfs_save_segblocks(seg, unlock); + if (error) { + nandfs_error("%s: error:%d saving seg:%p\n", + __func__, error, seg); + goto out; + } + } else { + ss = nandfs_fill_segsum(seg, 1); + fsdev->nd_last_segsum = *ss; + error = nandfs_save_segblocks(seg, unlock); + if (error) { + nandfs_error("%s: error:%d saving seg:%p\n", + __func__, error, seg); + goto out; + } + fsdev->nd_last_cno++; + fsdev->nd_last_pseg = seg->start_block; + } + } +out: + if (error) + clean_seginfo(seginfo, unlock); + return (error); +} + +static void +nandfs_invalidate_bufs(struct nandfs_device *fsdev, uint64_t segno) +{ + uint64_t start, end; + struct buf *bp, *tbd; + struct bufobj *bo; + + nandfs_get_segment_range(fsdev, segno, &start, &end); + + bo = &NTOV(fsdev->nd_gc_node)->v_bufobj; + + BO_LOCK(bo); +restart_locked_gc: + TAILQ_FOREACH_SAFE(bp, &bo->bo_clean.bv_hd, b_bobufs, tbd) { + if (!(bp->b_lblkno >= start && bp->b_lblkno <= end)) + continue; + + if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) + goto restart_locked_gc; + + bremfree(bp); + bp->b_flags |= (B_INVAL | B_RELBUF); + bp->b_flags &= ~(B_ASYNC | B_MANAGED); + BO_UNLOCK(bo); + brelse(bp); + BO_LOCK(bo); + } + BO_UNLOCK(bo); +} + +/* Process segments marks to free by cleaner */ +static void +nandfs_process_segments(struct nandfs_device *fsdev) +{ + uint64_t saved_segment; + int i; + + if (fsdev->nd_free_base) { + saved_segment = nandfs_get_segnum_of_block(fsdev, + fsdev->nd_super.s_last_pseg); + for (i = 0; i < fsdev->nd_free_count; i++) { + if (fsdev->nd_free_base[i] == NANDFS_NOSEGMENT) + continue; + /* Update superblock if clearing segment point by it */ + if (fsdev->nd_free_base[i] == saved_segment) { + nandfs_write_superblock(fsdev); + saved_segment = nandfs_get_segnum_of_block( + fsdev, fsdev->nd_super.s_last_pseg); + } + nandfs_invalidate_bufs(fsdev, fsdev->nd_free_base[i]); + nandfs_clear_segment(fsdev, fsdev->nd_free_base[i]); + } + + free(fsdev->nd_free_base, M_NANDFSTEMP); + fsdev->nd_free_base = NULL; + fsdev->nd_free_count = 0; + } +} + +/* Collect and write dirty buffers */ +int +nandfs_sync_file(struct vnode *vp) +{ + struct nandfs_device *fsdev; + struct nandfs_node *nandfs_node; + struct nandfsmount *nmp; + struct nandfs_node *dat, *su, *ifile, *cp; + struct nandfs_seginfo *seginfo = NULL; + struct nandfs_segment *seg; + int update, error; + int cno_changed; + + ASSERT_VOP_LOCKED(vp, __func__); + DPRINTF(SYNC, ("%s: START\n", __func__)); + + error = 0; + nmp = VFSTONANDFS(vp->v_mount); + fsdev = nmp->nm_nandfsdev; + + dat = fsdev->nd_dat_node; + su = fsdev->nd_su_node; + cp = fsdev->nd_cp_node; + ifile = nmp->nm_ifile_node; + + NANDFS_WRITEASSERT(fsdev); + if (lockmgr(&fsdev->nd_seg_const, LK_UPGRADE, NULL) != 0) { + DPRINTF(SYNC, ("%s: lost shared lock\n", __func__)); + if (lockmgr(&fsdev->nd_seg_const, LK_EXCLUSIVE, NULL) != 0) + panic("couldn't lock exclusive"); + } + DPRINTF(SYNC, ("%s: got lock\n", __func__)); + + VOP_LOCK(NTOV(su), LK_EXCLUSIVE); + create_seginfo(fsdev, &seginfo); + + update = 0; + + nandfs_node = VTON(vp); + if (nandfs_node->nn_flags & IN_MODIFIED) { + nandfs_node->nn_flags &= ~(IN_MODIFIED); + update = 1; + } + + if (vp->v_bufobj.bo_dirty.bv_cnt) { + error = nandfs_iterate_dirty_buf(vp, seginfo, 0); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + VOP_UNLOCK(NTOV(su), 0); + lockmgr(&fsdev->nd_seg_const, LK_DOWNGRADE, NULL); + nandfs_error("%s: err:%d iterating dirty bufs vp:%p", + __func__, error, vp); + return (error); + } + update = 1; + } + + if (update) { + VOP_LOCK(NTOV(ifile), LK_EXCLUSIVE); + error = nandfs_node_update(nandfs_node); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + VOP_UNLOCK(NTOV(ifile), 0); + VOP_UNLOCK(NTOV(su), 0); + lockmgr(&fsdev->nd_seg_const, LK_DOWNGRADE, NULL); + nandfs_error("%s: err:%d updating vp:%p", + __func__, error, vp); + return (error); + } + VOP_UNLOCK(NTOV(ifile), 0); + } + + cno_changed = 0; + if (seginfo->blocks) { + VOP_LOCK(NTOV(cp), LK_EXCLUSIVE); + cno_changed = 1; + /* Create new checkpoint */ + error = nandfs_get_checkpoint(fsdev, cp, fsdev->nd_last_cno + 1); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + VOP_UNLOCK(NTOV(cp), 0); + VOP_UNLOCK(NTOV(su), 0); + lockmgr(&fsdev->nd_seg_const, LK_DOWNGRADE, NULL); + nandfs_error("%s: err:%d getting cp:%jx", + __func__, error, fsdev->nd_last_cno + 1); + return (error); + } + + /* Reiterate all blocks and assign physical block number */ + nandfs_seginfo_assign_pblk(seginfo); + + /* Fill checkpoint data */ + error = nandfs_set_checkpoint(fsdev, cp, fsdev->nd_last_cno + 1, + &ifile->nn_inode, seginfo->blocks); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + VOP_UNLOCK(NTOV(cp), 0); + VOP_UNLOCK(NTOV(su), 0); + lockmgr(&fsdev->nd_seg_const, LK_DOWNGRADE, NULL); + nandfs_error("%s: err:%d setting cp:%jx", + __func__, error, fsdev->nd_last_cno + 1); + return (error); + } + + VOP_UNLOCK(NTOV(cp), 0); + LIST_FOREACH(seg, &seginfo->seg_list, seg_link) + nandfs_update_segment(fsdev, seg->seg_num, + seg->nblocks + seg->segsum_blocks); + + VOP_LOCK(NTOV(dat), LK_EXCLUSIVE); + error = save_seginfo(seginfo, 0); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + VOP_UNLOCK(NTOV(dat), 0); + VOP_UNLOCK(NTOV(su), 0); + lockmgr(&fsdev->nd_seg_const, LK_DOWNGRADE, NULL); + nandfs_error("%s: err:%d updating seg", + __func__, error); + return (error); + } + VOP_UNLOCK(NTOV(dat), 0); + } + + VOP_UNLOCK(NTOV(su), 0); + + delete_seginfo(seginfo); + lockmgr(&fsdev->nd_seg_const, LK_DOWNGRADE, NULL); + + if (cno_changed && !error) { + if (nandfs_cps_between_sblocks != 0 && + fsdev->nd_last_cno % nandfs_cps_between_sblocks == 0) + nandfs_write_superblock(fsdev); + } + + ASSERT_VOP_LOCKED(vp, __func__); + DPRINTF(SYNC, ("%s: END error %d\n", __func__, error)); + return (error); +} + +int +nandfs_segment_constructor(struct nandfsmount *nmp, int flags) +{ + struct nandfs_device *fsdev; + struct nandfs_seginfo *seginfo = NULL; + struct nandfs_segment *seg; + struct nandfs_node *dat, *su, *ifile, *cp, *gc; + int cno_changed, error; + + DPRINTF(SYNC, ("%s: START\n", __func__)); + fsdev = nmp->nm_nandfsdev; + + lockmgr(&fsdev->nd_seg_const, LK_EXCLUSIVE, NULL); + DPRINTF(SYNC, ("%s: git lock\n", __func__)); +again: + create_seginfo(fsdev, &seginfo); + + dat = fsdev->nd_dat_node; + su = fsdev->nd_su_node; + cp = fsdev->nd_cp_node; + gc = fsdev->nd_gc_node; + ifile = nmp->nm_ifile_node; + + VOP_LOCK(NTOV(su), LK_EXCLUSIVE); + VOP_LOCK(NTOV(ifile), LK_EXCLUSIVE); + VOP_LOCK(NTOV(gc), LK_EXCLUSIVE); + VOP_LOCK(NTOV(cp), LK_EXCLUSIVE); + + nandfs_iterate_system_vnode(gc, seginfo); + nandfs_iterate_dirty_vnodes(nmp->nm_vfs_mountp, seginfo); + nandfs_iterate_system_vnode(ifile, seginfo); + nandfs_iterate_system_vnode(su, seginfo); + + cno_changed = 0; + if (seginfo->blocks || flags) { + cno_changed = 1; + /* Create new checkpoint */ + error = nandfs_get_checkpoint(fsdev, cp, fsdev->nd_last_cno + 1); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + goto error_locks; + } + + /* Collect blocks from system files */ + nandfs_iterate_system_vnode(cp, seginfo); + nandfs_iterate_system_vnode(su, seginfo); + VOP_LOCK(NTOV(dat), LK_EXCLUSIVE); + nandfs_iterate_system_vnode(dat, seginfo); + VOP_UNLOCK(NTOV(dat), 0); +reiterate: + seginfo->reiterate = 0; + nandfs_iterate_system_vnode(su, seginfo); + VOP_LOCK(NTOV(dat), LK_EXCLUSIVE); + nandfs_iterate_system_vnode(dat, seginfo); + VOP_UNLOCK(NTOV(dat), 0); + if (seginfo->reiterate) + goto reiterate; + if (!(seginfo->curseg) || !seginfo->curseg->num_blocks) { + error = create_segment(seginfo); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + goto error_locks; + } + goto reiterate; + } + + /* Reiterate all blocks and assign physical block number */ + nandfs_seginfo_assign_pblk(seginfo); + + /* Fill superroot */ + error = nandfs_add_superroot(seginfo); + if (error) { + clean_seginfo(seginfo, 0); + delete_seginfo(seginfo); + goto error_locks; + } + KASSERT(!(seginfo->reiterate), ("reiteration after superroot")); + + /* Fill checkpoint data */ + nandfs_set_checkpoint(fsdev, cp, fsdev->nd_last_cno + 1, + &ifile->nn_inode, seginfo->blocks); + + LIST_FOREACH(seg, &seginfo->seg_list, seg_link) + nandfs_update_segment(fsdev, seg->seg_num, + seg->nblocks + seg->segsum_blocks); + + VOP_LOCK(NTOV(dat), LK_EXCLUSIVE); + error = save_seginfo(seginfo, 1); + if (error) { + clean_seginfo(seginfo, 1); + delete_seginfo(seginfo); + goto error_dat; + } + VOP_UNLOCK(NTOV(dat), 0); + } + + VOP_UNLOCK(NTOV(cp), 0); + VOP_UNLOCK(NTOV(gc), 0); + VOP_UNLOCK(NTOV(ifile), 0); + + nandfs_process_segments(fsdev); + + VOP_UNLOCK(NTOV(su), 0); + + delete_seginfo(seginfo); + + /* + * XXX: a hack, will go away soon + */ + if ((NTOV(dat)->v_bufobj.bo_dirty.bv_cnt != 0 || + NTOV(cp)->v_bufobj.bo_dirty.bv_cnt != 0 || + NTOV(gc)->v_bufobj.bo_dirty.bv_cnt != 0 || + NTOV(ifile)->v_bufobj.bo_dirty.bv_cnt != 0 || + NTOV(su)->v_bufobj.bo_dirty.bv_cnt != 0) && + (flags & NANDFS_UMOUNT)) { + DPRINTF(SYNC, ("%s: RERUN\n", __func__)); + goto again; + } + + MPASS(fsdev->nd_free_base == NULL); + + lockmgr(&fsdev->nd_seg_const, LK_RELEASE, NULL); + + if (cno_changed) { + if ((nandfs_cps_between_sblocks != 0 && + fsdev->nd_last_cno % nandfs_cps_between_sblocks == 0) || + flags & NANDFS_UMOUNT) + nandfs_write_superblock(fsdev); + } + + DPRINTF(SYNC, ("%s: END\n", __func__)); + return (0); +error_dat: + VOP_UNLOCK(NTOV(dat), 0); +error_locks: + VOP_UNLOCK(NTOV(cp), 0); + VOP_UNLOCK(NTOV(gc), 0); + VOP_UNLOCK(NTOV(ifile), 0); + VOP_UNLOCK(NTOV(su), 0); + lockmgr(&fsdev->nd_seg_const, LK_RELEASE, NULL); + + return (error); +} + +#ifdef DDB +/* + * Show details about the given NANDFS mount point. + */ +DB_SHOW_COMMAND(nandfs, db_show_nandfs) +{ + struct mount *mp; + struct nandfs_device *nffsdev; + struct nandfs_segment *seg; + struct nandfsmount *nmp; + struct buf *bp; + struct vnode *vp; + + if (!have_addr) { + db_printf("\nUsage: show nandfs <mount_addr>\n"); + return; + } + + mp = (struct mount *)addr; + db_printf("%p %s on %s (%s)\n", mp, mp->mnt_stat.f_mntfromname, + mp->mnt_stat.f_mntonname, mp->mnt_stat.f_fstypename); + + + nmp = (struct nandfsmount *)(mp->mnt_data); + nffsdev = nmp->nm_nandfsdev; + db_printf("dev vnode:%p\n", nffsdev->nd_devvp); + db_printf("blocksize:%jx last cno:%jx last pseg:%jx seg num:%jx\n", + (uintmax_t)nffsdev->nd_blocksize, (uintmax_t)nffsdev->nd_last_cno, + (uintmax_t)nffsdev->nd_last_pseg, (uintmax_t)nffsdev->nd_seg_num); + db_printf("system nodes: dat:%p cp:%p su:%p ifile:%p gc:%p\n", + nffsdev->nd_dat_node, nffsdev->nd_cp_node, nffsdev->nd_su_node, + nmp->nm_ifile_node, nffsdev->nd_gc_node); + + if (nffsdev->nd_seginfo != NULL) { + LIST_FOREACH(seg, &nffsdev->nd_seginfo->seg_list, seg_link) { + db_printf("seg: %p\n", seg); + TAILQ_FOREACH(bp, &seg->segsum, + b_cluster.cluster_entry) + db_printf("segbp %p\n", bp); + TAILQ_FOREACH(bp, &seg->data, + b_cluster.cluster_entry) { + vp = bp->b_vp; + db_printf("bp:%p bp->b_vp:%p ino:%jx\n", bp, vp, + (uintmax_t)(vp ? VTON(vp)->nn_ino : 0)); + } + } + } +} +#endif |
