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Diffstat (limited to 'sys/fs/nandfs/nandfs_vfsops.c')
-rw-r--r--sys/fs/nandfs/nandfs_vfsops.c1601
1 files changed, 0 insertions, 1601 deletions
diff --git a/sys/fs/nandfs/nandfs_vfsops.c b/sys/fs/nandfs/nandfs_vfsops.c
deleted file mode 100644
index f703044728ef..000000000000
--- a/sys/fs/nandfs/nandfs_vfsops.c
+++ /dev/null
@@ -1,1601 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2010-2012 Semihalf
- * Copyright (c) 2008, 2009 Reinoud Zandijk
- * 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 ``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 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.
- *
- * From: NetBSD: nilfs_vfsops.c,v 1.1 2009/07/18 16:31:42 reinoud Exp
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/fcntl.h>
-#include <sys/gsb_crc32.h>
-#include <sys/kernel.h>
-#include <sys/lock.h>
-#include <sys/malloc.h>
-#include <sys/mount.h>
-#include <sys/namei.h>
-#include <sys/proc.h>
-#include <sys/priv.h>
-#include <sys/vnode.h>
-#include <sys/buf.h>
-#include <sys/sysctl.h>
-#include <sys/libkern.h>
-
-#include <geom/geom.h>
-#include <geom/geom_vfs.h>
-
-#include <machine/_inttypes.h>
-
-#include <fs/nandfs/nandfs_mount.h>
-#include <fs/nandfs/nandfs.h>
-#include <fs/nandfs/nandfs_subr.h>
-
-static MALLOC_DEFINE(M_NANDFSMNT, "nandfs_mount", "NANDFS mount structure");
-
-#define NANDFS_SET_SYSTEMFILE(vp) { \
- (vp)->v_vflag |= VV_SYSTEM; \
- vref(vp); \
- vput(vp); }
-
-#define NANDFS_UNSET_SYSTEMFILE(vp) { \
- VOP_LOCK(vp, LK_EXCLUSIVE); \
- MPASS(vp->v_bufobj.bo_dirty.bv_cnt == 0); \
- (vp)->v_vflag &= ~VV_SYSTEM; \
- vgone(vp); \
- vput(vp); }
-
-/* Globals */
-struct _nandfs_devices nandfs_devices;
-
-/* Parameters */
-int nandfs_verbose = 0;
-
-static void
-nandfs_tunable_init(void *arg)
-{
-
- TUNABLE_INT_FETCH("vfs.nandfs.verbose", &nandfs_verbose);
-}
-SYSINIT(nandfs_tunables, SI_SUB_VFS, SI_ORDER_ANY, nandfs_tunable_init, NULL);
-
-static SYSCTL_NODE(_vfs, OID_AUTO, nandfs, CTLFLAG_RD, 0, "NAND filesystem");
-static SYSCTL_NODE(_vfs_nandfs, OID_AUTO, mount, CTLFLAG_RD, 0,
- "NANDFS mountpoints");
-SYSCTL_INT(_vfs_nandfs, OID_AUTO, verbose, CTLFLAG_RW, &nandfs_verbose, 0, "");
-
-#define NANDFS_CONSTR_INTERVAL 5
-int nandfs_sync_interval = NANDFS_CONSTR_INTERVAL; /* sync every 5 seconds */
-SYSCTL_UINT(_vfs_nandfs, OID_AUTO, sync_interval, CTLFLAG_RW,
- &nandfs_sync_interval, 0, "");
-
-#define NANDFS_MAX_DIRTY_SEGS 5
-int nandfs_max_dirty_segs = NANDFS_MAX_DIRTY_SEGS; /* sync when 5 dirty seg */
-SYSCTL_UINT(_vfs_nandfs, OID_AUTO, max_dirty_segs, CTLFLAG_RW,
- &nandfs_max_dirty_segs, 0, "");
-
-#define NANDFS_CPS_BETWEEN_SBLOCKS 5
-int nandfs_cps_between_sblocks = NANDFS_CPS_BETWEEN_SBLOCKS; /* write superblock every 5 checkpoints */
-SYSCTL_UINT(_vfs_nandfs, OID_AUTO, cps_between_sblocks, CTLFLAG_RW,
- &nandfs_cps_between_sblocks, 0, "");
-
-#define NANDFS_CLEANER_ENABLE 1
-int nandfs_cleaner_enable = NANDFS_CLEANER_ENABLE;
-SYSCTL_UINT(_vfs_nandfs, OID_AUTO, cleaner_enable, CTLFLAG_RW,
- &nandfs_cleaner_enable, 0, "");
-
-#define NANDFS_CLEANER_INTERVAL 5
-int nandfs_cleaner_interval = NANDFS_CLEANER_INTERVAL;
-SYSCTL_UINT(_vfs_nandfs, OID_AUTO, cleaner_interval, CTLFLAG_RW,
- &nandfs_cleaner_interval, 0, "");
-
-#define NANDFS_CLEANER_SEGMENTS 5
-int nandfs_cleaner_segments = NANDFS_CLEANER_SEGMENTS;
-SYSCTL_UINT(_vfs_nandfs, OID_AUTO, cleaner_segments, CTLFLAG_RW,
- &nandfs_cleaner_segments, 0, "");
-
-static int nandfs_mountfs(struct vnode *devvp, struct mount *mp);
-static vfs_mount_t nandfs_mount;
-static vfs_root_t nandfs_root;
-static vfs_statfs_t nandfs_statfs;
-static vfs_unmount_t nandfs_unmount;
-static vfs_vget_t nandfs_vget;
-static vfs_sync_t nandfs_sync;
-static const char *nandfs_opts[] = {
- "snap", "from", "noatime", NULL
-};
-
-/* System nodes */
-static int
-nandfs_create_system_nodes(struct nandfs_device *nandfsdev)
-{
- int error;
-
- error = nandfs_get_node_raw(nandfsdev, NULL, NANDFS_DAT_INO,
- &nandfsdev->nd_super_root.sr_dat, &nandfsdev->nd_dat_node);
- if (error)
- goto errorout;
-
- error = nandfs_get_node_raw(nandfsdev, NULL, NANDFS_CPFILE_INO,
- &nandfsdev->nd_super_root.sr_cpfile, &nandfsdev->nd_cp_node);
- if (error)
- goto errorout;
-
- error = nandfs_get_node_raw(nandfsdev, NULL, NANDFS_SUFILE_INO,
- &nandfsdev->nd_super_root.sr_sufile, &nandfsdev->nd_su_node);
- if (error)
- goto errorout;
-
- error = nandfs_get_node_raw(nandfsdev, NULL, NANDFS_GC_INO,
- NULL, &nandfsdev->nd_gc_node);
- if (error)
- goto errorout;
-
- NANDFS_SET_SYSTEMFILE(NTOV(nandfsdev->nd_dat_node));
- NANDFS_SET_SYSTEMFILE(NTOV(nandfsdev->nd_cp_node));
- NANDFS_SET_SYSTEMFILE(NTOV(nandfsdev->nd_su_node));
- NANDFS_SET_SYSTEMFILE(NTOV(nandfsdev->nd_gc_node));
-
- DPRINTF(VOLUMES, ("System vnodes: dat: %p cp: %p su: %p\n",
- NTOV(nandfsdev->nd_dat_node), NTOV(nandfsdev->nd_cp_node),
- NTOV(nandfsdev->nd_su_node)));
- return (0);
-
-errorout:
- nandfs_dispose_node(&nandfsdev->nd_gc_node);
- nandfs_dispose_node(&nandfsdev->nd_dat_node);
- nandfs_dispose_node(&nandfsdev->nd_cp_node);
- nandfs_dispose_node(&nandfsdev->nd_su_node);
-
- return (error);
-}
-
-static void
-nandfs_release_system_nodes(struct nandfs_device *nandfsdev)
-{
-
- if (!nandfsdev)
- return;
- if (nandfsdev->nd_refcnt > 0)
- return;
-
- if (nandfsdev->nd_gc_node)
- NANDFS_UNSET_SYSTEMFILE(NTOV(nandfsdev->nd_gc_node));
- if (nandfsdev->nd_dat_node)
- NANDFS_UNSET_SYSTEMFILE(NTOV(nandfsdev->nd_dat_node));
- if (nandfsdev->nd_cp_node)
- NANDFS_UNSET_SYSTEMFILE(NTOV(nandfsdev->nd_cp_node));
- if (nandfsdev->nd_su_node)
- NANDFS_UNSET_SYSTEMFILE(NTOV(nandfsdev->nd_su_node));
-}
-
-static int
-nandfs_check_fsdata_crc(struct nandfs_fsdata *fsdata)
-{
- uint32_t fsdata_crc, comp_crc;
-
- if (fsdata->f_magic != NANDFS_FSDATA_MAGIC)
- return (0);
-
- /* Preserve CRC */
- fsdata_crc = fsdata->f_sum;
-
- /* Calculate */
- fsdata->f_sum = (0);
- comp_crc = crc32((uint8_t *)fsdata, fsdata->f_bytes);
-
- /* Restore */
- fsdata->f_sum = fsdata_crc;
-
- /* Check CRC */
- return (fsdata_crc == comp_crc);
-}
-
-static int
-nandfs_check_superblock_crc(struct nandfs_fsdata *fsdata,
- struct nandfs_super_block *super)
-{
- uint32_t super_crc, comp_crc;
-
- /* Check super block magic */
- if (super->s_magic != NANDFS_SUPER_MAGIC)
- return (0);
-
- /* Preserve CRC */
- super_crc = super->s_sum;
-
- /* Calculate */
- super->s_sum = (0);
- comp_crc = crc32((uint8_t *)super, fsdata->f_sbbytes);
-
- /* Restore */
- super->s_sum = super_crc;
-
- /* Check CRC */
- return (super_crc == comp_crc);
-}
-
-static void
-nandfs_calc_superblock_crc(struct nandfs_fsdata *fsdata,
- struct nandfs_super_block *super)
-{
- uint32_t comp_crc;
-
- /* Calculate */
- super->s_sum = 0;
- comp_crc = crc32((uint8_t *)super, fsdata->f_sbbytes);
-
- /* Restore */
- super->s_sum = comp_crc;
-}
-
-static int
-nandfs_is_empty(u_char *area, int size)
-{
- int i;
-
- for (i = 0; i < size; i++)
- if (area[i] != 0xff)
- return (0);
-
- return (1);
-}
-
-static __inline int
-nandfs_sblocks_in_esize(struct nandfs_device *fsdev)
-{
-
- return ((fsdev->nd_erasesize - NANDFS_SBLOCK_OFFSET_BYTES) /
- sizeof(struct nandfs_super_block));
-}
-
-static __inline int
-nandfs_max_sblocks(struct nandfs_device *fsdev)
-{
-
- return (NANDFS_NFSAREAS * nandfs_sblocks_in_esize(fsdev));
-}
-
-static __inline int
-nandfs_sblocks_in_block(struct nandfs_device *fsdev)
-{
-
- return (fsdev->nd_devblocksize / sizeof(struct nandfs_super_block));
-}
-
-#if 0
-static __inline int
-nandfs_sblocks_in_first_block(struct nandfs_device *fsdev)
-{
- int n;
-
- n = nandfs_sblocks_in_block(fsdev) -
- NANDFS_SBLOCK_OFFSET_BYTES / sizeof(struct nandfs_super_block);
- if (n < 0)
- n = 0;
-
- return (n);
-}
-#endif
-
-static int
-nandfs_write_superblock_at(struct nandfs_device *fsdev,
- struct nandfs_fsarea *fstp)
-{
- struct nandfs_super_block *super, *supert;
- struct buf *bp;
- int sb_per_sector, sbs_in_fsd, read_block;
- int index, pos, error;
- off_t offset;
-
- DPRINTF(SYNC, ("%s: last_used %d nandfs_sblocks_in_esize %d\n",
- __func__, fstp->last_used, nandfs_sblocks_in_esize(fsdev)));
- if (fstp->last_used == nandfs_sblocks_in_esize(fsdev) - 1)
- index = 0;
- else
- index = fstp->last_used + 1;
-
- super = &fsdev->nd_super;
- supert = NULL;
-
- sb_per_sector = nandfs_sblocks_in_block(fsdev);
- sbs_in_fsd = sizeof(struct nandfs_fsdata) /
- sizeof(struct nandfs_super_block);
- index += sbs_in_fsd;
- offset = fstp->offset;
-
- DPRINTF(SYNC, ("%s: offset %#jx s_last_pseg %#jx s_last_cno %#jx "
- "s_last_seq %#jx wtime %jd index %d\n", __func__, offset,
- super->s_last_pseg, super->s_last_cno, super->s_last_seq,
- super->s_wtime, index));
-
- read_block = btodb(offset + rounddown(index, sb_per_sector) *
- sizeof(struct nandfs_super_block));
-
- DPRINTF(SYNC, ("%s: read_block %#x\n", __func__, read_block));
-
- if (index == sbs_in_fsd) {
- error = nandfs_erase(fsdev, offset, fsdev->nd_erasesize);
- if (error)
- return (error);
-
- error = bread(fsdev->nd_devvp, btodb(offset),
- fsdev->nd_devblocksize, NOCRED, &bp);
- if (error) {
- printf("NANDFS: couldn't read initial data: %d\n",
- error);
- brelse(bp);
- return (error);
- }
- memcpy(bp->b_data, &fsdev->nd_fsdata, sizeof(fsdev->nd_fsdata));
- /*
- * 0xff-out the rest. This bp could be cached, so potentially
- * b_data contains stale super blocks.
- *
- * We don't mind cached bp since most of the time we just add
- * super blocks to already 0xff-out b_data and don't need to
- * perform actual read.
- */
- if (fsdev->nd_devblocksize > sizeof(fsdev->nd_fsdata))
- memset(bp->b_data + sizeof(fsdev->nd_fsdata), 0xff,
- fsdev->nd_devblocksize - sizeof(fsdev->nd_fsdata));
- error = bwrite(bp);
- if (error) {
- printf("NANDFS: cannot rewrite initial data at %jx\n",
- offset);
- return (error);
- }
- }
-
- error = bread(fsdev->nd_devvp, read_block, fsdev->nd_devblocksize,
- NOCRED, &bp);
- if (error) {
- brelse(bp);
- return (error);
- }
-
- supert = (struct nandfs_super_block *)(bp->b_data);
- pos = index % sb_per_sector;
-
- DPRINTF(SYNC, ("%s: storing at %d\n", __func__, pos));
- memcpy(&supert[pos], super, sizeof(struct nandfs_super_block));
-
- /*
- * See comment above in code that performs erase.
- */
- if (pos == 0)
- memset(&supert[1], 0xff,
- (sb_per_sector - 1) * sizeof(struct nandfs_super_block));
-
- error = bwrite(bp);
- if (error) {
- printf("NANDFS: cannot update superblock at %jx\n", offset);
- return (error);
- }
-
- DPRINTF(SYNC, ("%s: fstp->last_used %d -> %d\n", __func__,
- fstp->last_used, index - sbs_in_fsd));
- fstp->last_used = index - sbs_in_fsd;
-
- return (0);
-}
-
-int
-nandfs_write_superblock(struct nandfs_device *fsdev)
-{
- struct nandfs_super_block *super;
- struct timespec ts;
- int error;
- int i, j;
-
- vfs_timestamp(&ts);
-
- super = &fsdev->nd_super;
-
- super->s_last_pseg = fsdev->nd_last_pseg;
- super->s_last_cno = fsdev->nd_last_cno;
- super->s_last_seq = fsdev->nd_seg_sequence;
- super->s_wtime = ts.tv_sec;
-
- nandfs_calc_superblock_crc(&fsdev->nd_fsdata, super);
-
- error = 0;
- for (i = 0, j = fsdev->nd_last_fsarea; i < NANDFS_NFSAREAS;
- i++, j = (j + 1 % NANDFS_NFSAREAS)) {
- if (fsdev->nd_fsarea[j].flags & NANDFS_FSSTOR_FAILED) {
- DPRINTF(SYNC, ("%s: skipping %d\n", __func__, j));
- continue;
- }
- error = nandfs_write_superblock_at(fsdev, &fsdev->nd_fsarea[j]);
- if (error) {
- printf("NANDFS: writing superblock at offset %d failed:"
- "%d\n", j * fsdev->nd_erasesize, error);
- fsdev->nd_fsarea[j].flags |= NANDFS_FSSTOR_FAILED;
- } else
- break;
- }
-
- if (i == NANDFS_NFSAREAS) {
- printf("NANDFS: superblock was not written\n");
- /*
- * TODO: switch to read-only?
- */
- return (error);
- } else
- fsdev->nd_last_fsarea = (j + 1) % NANDFS_NFSAREAS;
-
- return (0);
-}
-
-static int
-nandfs_select_fsdata(struct nandfs_device *fsdev,
- struct nandfs_fsdata *fsdatat, struct nandfs_fsdata **fsdata, int nfsds)
-{
- int i;
-
- *fsdata = NULL;
- for (i = 0; i < nfsds; i++) {
- DPRINTF(VOLUMES, ("%s: i %d f_magic %x f_crc %x\n", __func__,
- i, fsdatat[i].f_magic, fsdatat[i].f_sum));
- if (!nandfs_check_fsdata_crc(&fsdatat[i]))
- continue;
- *fsdata = &fsdatat[i];
- break;
- }
-
- return (*fsdata != NULL ? 0 : EINVAL);
-}
-
-static int
-nandfs_select_sb(struct nandfs_device *fsdev,
- struct nandfs_super_block *supert, struct nandfs_super_block **super,
- int nsbs)
-{
- int i;
-
- *super = NULL;
- for (i = 0; i < nsbs; i++) {
- if (!nandfs_check_superblock_crc(&fsdev->nd_fsdata, &supert[i]))
- continue;
- DPRINTF(SYNC, ("%s: i %d s_last_cno %jx s_magic %x "
- "s_wtime %jd\n", __func__, i, supert[i].s_last_cno,
- supert[i].s_magic, supert[i].s_wtime));
- if (*super == NULL || supert[i].s_last_cno >
- (*super)->s_last_cno)
- *super = &supert[i];
- }
-
- return (*super != NULL ? 0 : EINVAL);
-}
-
-static int
-nandfs_read_structures_at(struct nandfs_device *fsdev,
- struct nandfs_fsarea *fstp, struct nandfs_fsdata *fsdata,
- struct nandfs_super_block *super)
-{
- struct nandfs_super_block *tsuper, *tsuperd;
- struct buf *bp;
- int error, read_size;
- int i;
- int offset;
-
- offset = fstp->offset;
-
- if (fsdev->nd_erasesize > MAXBSIZE)
- read_size = MAXBSIZE;
- else
- read_size = fsdev->nd_erasesize;
-
- error = bread(fsdev->nd_devvp, btodb(offset), read_size, NOCRED, &bp);
- if (error) {
- printf("couldn't read: %d\n", error);
- brelse(bp);
- fstp->flags |= NANDFS_FSSTOR_FAILED;
- return (error);
- }
-
- tsuper = super;
-
- memcpy(fsdata, bp->b_data, sizeof(struct nandfs_fsdata));
- memcpy(tsuper, (bp->b_data + sizeof(struct nandfs_fsdata)),
- read_size - sizeof(struct nandfs_fsdata));
- brelse(bp);
-
- tsuper += (read_size - sizeof(struct nandfs_fsdata)) /
- sizeof(struct nandfs_super_block);
-
- for (i = 1; i < fsdev->nd_erasesize / read_size; i++) {
- error = bread(fsdev->nd_devvp, btodb(offset + i * read_size),
- read_size, NOCRED, &bp);
- if (error) {
- printf("couldn't read: %d\n", error);
- brelse(bp);
- fstp->flags |= NANDFS_FSSTOR_FAILED;
- return (error);
- }
- memcpy(tsuper, bp->b_data, read_size);
- tsuper += read_size / sizeof(struct nandfs_super_block);
- brelse(bp);
- }
-
- tsuper -= 1;
- fstp->last_used = nandfs_sblocks_in_esize(fsdev) - 1;
- for (tsuperd = super - 1; (tsuper != tsuperd); tsuper -= 1) {
- if (nandfs_is_empty((u_char *)tsuper, sizeof(*tsuper)))
- fstp->last_used--;
- else
- break;
- }
-
- DPRINTF(VOLUMES, ("%s: last_used %d\n", __func__, fstp->last_used));
-
- return (0);
-}
-
-static int
-nandfs_read_structures(struct nandfs_device *fsdev)
-{
- struct nandfs_fsdata *fsdata, *fsdatat;
- struct nandfs_super_block *sblocks, *ssblock;
- u_int nsbs, nfsds, i;
- int error = 0;
- int nrsbs;
-
- nfsds = NANDFS_NFSAREAS;
- nsbs = nandfs_max_sblocks(fsdev);
-
- fsdatat = malloc(sizeof(struct nandfs_fsdata) * nfsds, M_NANDFSTEMP,
- M_WAITOK | M_ZERO);
- sblocks = malloc(sizeof(struct nandfs_super_block) * nsbs, M_NANDFSTEMP,
- M_WAITOK | M_ZERO);
-
- nrsbs = 0;
- for (i = 0; i < NANDFS_NFSAREAS; i++) {
- fsdev->nd_fsarea[i].offset = i * fsdev->nd_erasesize;
- error = nandfs_read_structures_at(fsdev, &fsdev->nd_fsarea[i],
- &fsdatat[i], sblocks + nrsbs);
- if (error)
- continue;
- nrsbs += (fsdev->nd_fsarea[i].last_used + 1);
- if (fsdev->nd_fsarea[fsdev->nd_last_fsarea].last_used >
- fsdev->nd_fsarea[i].last_used)
- fsdev->nd_last_fsarea = i;
- }
-
- if (nrsbs == 0) {
- printf("nandfs: no valid superblocks found\n");
- error = EINVAL;
- goto out;
- }
-
- error = nandfs_select_fsdata(fsdev, fsdatat, &fsdata, nfsds);
- if (error)
- goto out;
- memcpy(&fsdev->nd_fsdata, fsdata, sizeof(struct nandfs_fsdata));
-
- error = nandfs_select_sb(fsdev, sblocks, &ssblock, nsbs);
- if (error)
- goto out;
-
- memcpy(&fsdev->nd_super, ssblock, sizeof(struct nandfs_super_block));
-out:
- free(fsdatat, M_NANDFSTEMP);
- free(sblocks, M_NANDFSTEMP);
-
- if (error == 0)
- DPRINTF(VOLUMES, ("%s: selected sb with w_time %jd "
- "last_pseg %#jx\n", __func__, fsdev->nd_super.s_wtime,
- fsdev->nd_super.s_last_pseg));
-
- return (error);
-}
-
-static void
-nandfs_unmount_base(struct nandfs_device *nandfsdev)
-{
- int error;
-
- if (!nandfsdev)
- return;
-
- /* Remove all our information */
- error = vinvalbuf(nandfsdev->nd_devvp, V_SAVE, 0, 0);
- if (error) {
- /*
- * Flushing buffers failed when fs was umounting, can't do
- * much now, just printf error and continue with umount.
- */
- nandfs_error("%s(): error:%d when umounting FS\n",
- __func__, error);
- }
-
- /* Release the device's system nodes */
- nandfs_release_system_nodes(nandfsdev);
-}
-
-static void
-nandfs_get_ncleanseg(struct nandfs_device *nandfsdev)
-{
- struct nandfs_seg_stat nss;
-
- nandfs_get_seg_stat(nandfsdev, &nss);
- nandfsdev->nd_clean_segs = nss.nss_ncleansegs;
- DPRINTF(VOLUMES, ("nandfs_mount: clean segs: %jx\n",
- (uintmax_t)nandfsdev->nd_clean_segs));
-}
-
-
-static int
-nandfs_mount_base(struct nandfs_device *nandfsdev, struct mount *mp,
- struct nandfs_args *args)
-{
- uint32_t log_blocksize;
- int error;
-
- /* Flush out any old buffers remaining from a previous use. */
- if ((error = vinvalbuf(nandfsdev->nd_devvp, V_SAVE, 0, 0)))
- return (error);
-
- error = nandfs_read_structures(nandfsdev);
- if (error) {
- printf("nandfs: could not get valid filesystem structures\n");
- return (error);
- }
-
- if (nandfsdev->nd_fsdata.f_rev_level != NANDFS_CURRENT_REV) {
- printf("nandfs: unsupported file system revision: %d "
- "(supported is %d).\n", nandfsdev->nd_fsdata.f_rev_level,
- NANDFS_CURRENT_REV);
- return (EINVAL);
- }
-
- if (nandfsdev->nd_fsdata.f_erasesize != nandfsdev->nd_erasesize) {
- printf("nandfs: erasesize mismatch (device %#x, fs %#x)\n",
- nandfsdev->nd_erasesize, nandfsdev->nd_fsdata.f_erasesize);
- return (EINVAL);
- }
-
- /* Get our blocksize */
- log_blocksize = nandfsdev->nd_fsdata.f_log_block_size;
- nandfsdev->nd_blocksize = (uint64_t) 1 << (log_blocksize + 10);
- DPRINTF(VOLUMES, ("%s: blocksize:%x\n", __func__,
- nandfsdev->nd_blocksize));
-
- DPRINTF(VOLUMES, ("%s: accepted super block with cp %#jx\n", __func__,
- (uintmax_t)nandfsdev->nd_super.s_last_cno));
-
- /* Calculate dat structure parameters */
- nandfs_calc_mdt_consts(nandfsdev, &nandfsdev->nd_dat_mdt,
- nandfsdev->nd_fsdata.f_dat_entry_size);
- nandfs_calc_mdt_consts(nandfsdev, &nandfsdev->nd_ifile_mdt,
- nandfsdev->nd_fsdata.f_inode_size);
-
- /* Search for the super root and roll forward when needed */
- if (nandfs_search_super_root(nandfsdev)) {
- printf("Cannot find valid SuperRoot\n");
- return (EINVAL);
- }
-
- nandfsdev->nd_mount_state = nandfsdev->nd_super.s_state;
- if (nandfsdev->nd_mount_state != NANDFS_VALID_FS) {
- printf("FS is seriously damaged, needs repairing\n");
- printf("aborting mount\n");
- return (EINVAL);
- }
-
- /*
- * FS should be ok now. The superblock and the last segsum could be
- * updated from the repair so extract running values again.
- */
- nandfsdev->nd_last_pseg = nandfsdev->nd_super.s_last_pseg;
- nandfsdev->nd_seg_sequence = nandfsdev->nd_super.s_last_seq;
- nandfsdev->nd_seg_num = nandfs_get_segnum_of_block(nandfsdev,
- nandfsdev->nd_last_pseg);
- nandfsdev->nd_next_seg_num = nandfs_get_segnum_of_block(nandfsdev,
- nandfsdev->nd_last_segsum.ss_next);
- nandfsdev->nd_ts.tv_sec = nandfsdev->nd_last_segsum.ss_create;
- nandfsdev->nd_last_cno = nandfsdev->nd_super.s_last_cno;
- nandfsdev->nd_fakevblk = 1;
- /*
- * FIXME: bogus calculation. Should use actual number of usable segments
- * instead of total amount.
- */
- nandfsdev->nd_segs_reserved =
- nandfsdev->nd_fsdata.f_nsegments *
- nandfsdev->nd_fsdata.f_r_segments_percentage / 100;
- nandfsdev->nd_last_ino = NANDFS_USER_INO;
- DPRINTF(VOLUMES, ("%s: last_pseg %#jx last_cno %#jx last_seq %#jx\n"
- "fsdev: last_seg: seq %#jx num %#jx, next_seg_num %#jx "
- "segs_reserved %#jx\n",
- __func__, (uintmax_t)nandfsdev->nd_last_pseg,
- (uintmax_t)nandfsdev->nd_last_cno,
- (uintmax_t)nandfsdev->nd_seg_sequence,
- (uintmax_t)nandfsdev->nd_seg_sequence,
- (uintmax_t)nandfsdev->nd_seg_num,
- (uintmax_t)nandfsdev->nd_next_seg_num,
- (uintmax_t)nandfsdev->nd_segs_reserved));
-
- DPRINTF(VOLUMES, ("nandfs_mount: accepted super root\n"));
-
- /* Create system vnodes for DAT, CP and SEGSUM */
- error = nandfs_create_system_nodes(nandfsdev);
- if (error)
- nandfs_unmount_base(nandfsdev);
-
- nandfs_get_ncleanseg(nandfsdev);
-
- return (error);
-}
-
-static void
-nandfs_unmount_device(struct nandfs_device *nandfsdev)
-{
-
- /* Is there anything? */
- if (nandfsdev == NULL)
- return;
-
- /* Remove the device only if we're the last reference */
- nandfsdev->nd_refcnt--;
- if (nandfsdev->nd_refcnt >= 1)
- return;
-
- MPASS(nandfsdev->nd_syncer == NULL);
- MPASS(nandfsdev->nd_cleaner == NULL);
- MPASS(nandfsdev->nd_free_base == NULL);
-
- /* Unmount our base */
- nandfs_unmount_base(nandfsdev);
-
- /* Remove from our device list */
- SLIST_REMOVE(&nandfs_devices, nandfsdev, nandfs_device, nd_next_device);
-
- DROP_GIANT();
- g_topology_lock();
- g_vfs_close(nandfsdev->nd_gconsumer);
- g_topology_unlock();
- PICKUP_GIANT();
-
- DPRINTF(VOLUMES, ("closing device\n"));
-
- /* Clear our mount reference and release device node */
- vrele(nandfsdev->nd_devvp);
-
- dev_rel(nandfsdev->nd_devvp->v_rdev);
-
- /* Free our device info */
- cv_destroy(&nandfsdev->nd_sync_cv);
- mtx_destroy(&nandfsdev->nd_sync_mtx);
- cv_destroy(&nandfsdev->nd_clean_cv);
- mtx_destroy(&nandfsdev->nd_clean_mtx);
- mtx_destroy(&nandfsdev->nd_mutex);
- lockdestroy(&nandfsdev->nd_seg_const);
- free(nandfsdev, M_NANDFSMNT);
-}
-
-static int
-nandfs_check_mounts(struct nandfs_device *nandfsdev, struct mount *mp,
- struct nandfs_args *args)
-{
- struct nandfsmount *nmp;
- uint64_t last_cno;
-
- /* no double-mounting of the same checkpoint */
- STAILQ_FOREACH(nmp, &nandfsdev->nd_mounts, nm_next_mount) {
- if (nmp->nm_mount_args.cpno == args->cpno)
- return (EBUSY);
- }
-
- /* Allow readonly mounts without questioning here */
- if (mp->mnt_flag & MNT_RDONLY)
- return (0);
-
- /* Read/write mount */
- STAILQ_FOREACH(nmp, &nandfsdev->nd_mounts, nm_next_mount) {
- /* Only one RW mount on this device! */
- if ((nmp->nm_vfs_mountp->mnt_flag & MNT_RDONLY)==0)
- return (EROFS);
- /* RDONLY on last mountpoint is device busy */
- last_cno = nmp->nm_nandfsdev->nd_super.s_last_cno;
- if (nmp->nm_mount_args.cpno == last_cno)
- return (EBUSY);
- }
-
- /* OK for now */
- return (0);
-}
-
-static int
-nandfs_mount_device(struct vnode *devvp, struct mount *mp,
- struct nandfs_args *args, struct nandfs_device **nandfsdev_p)
-{
- struct nandfs_device *nandfsdev;
- struct g_provider *pp;
- struct g_consumer *cp;
- struct cdev *dev;
- uint32_t erasesize;
- int error, size;
- int ronly;
-
- DPRINTF(VOLUMES, ("Mounting NANDFS device\n"));
-
- ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
-
- /* Look up device in our nandfs_mountpoints */
- *nandfsdev_p = NULL;
- SLIST_FOREACH(nandfsdev, &nandfs_devices, nd_next_device)
- if (nandfsdev->nd_devvp == devvp)
- break;
-
- if (nandfsdev) {
- DPRINTF(VOLUMES, ("device already mounted\n"));
- error = nandfs_check_mounts(nandfsdev, mp, args);
- if (error)
- return error;
- nandfsdev->nd_refcnt++;
- *nandfsdev_p = nandfsdev;
-
- if (!ronly) {
- DROP_GIANT();
- g_topology_lock();
- error = g_access(nandfsdev->nd_gconsumer, 0, 1, 0);
- g_topology_unlock();
- PICKUP_GIANT();
- }
- return (error);
- }
-
- vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
- dev = devvp->v_rdev;
- dev_ref(dev);
- DROP_GIANT();
- g_topology_lock();
- error = g_vfs_open(devvp, &cp, "nandfs", ronly ? 0 : 1);
- pp = g_dev_getprovider(dev);
- g_topology_unlock();
- PICKUP_GIANT();
- VOP_UNLOCK(devvp, 0);
- if (error) {
- dev_rel(dev);
- return (error);
- }
-
- nandfsdev = malloc(sizeof(struct nandfs_device), M_NANDFSMNT, M_WAITOK | M_ZERO);
-
- /* Initialise */
- nandfsdev->nd_refcnt = 1;
- nandfsdev->nd_devvp = devvp;
- nandfsdev->nd_syncing = 0;
- nandfsdev->nd_cleaning = 0;
- nandfsdev->nd_gconsumer = cp;
- cv_init(&nandfsdev->nd_sync_cv, "nandfssync");
- mtx_init(&nandfsdev->nd_sync_mtx, "nffssyncmtx", NULL, MTX_DEF);
- cv_init(&nandfsdev->nd_clean_cv, "nandfsclean");
- mtx_init(&nandfsdev->nd_clean_mtx, "nffscleanmtx", NULL, MTX_DEF);
- mtx_init(&nandfsdev->nd_mutex, "nandfsdev lock", NULL, MTX_DEF);
- lockinit(&nandfsdev->nd_seg_const, PVFS, "nffssegcon", VLKTIMEOUT,
- LK_CANRECURSE);
- STAILQ_INIT(&nandfsdev->nd_mounts);
-
- nandfsdev->nd_devsize = pp->mediasize;
- nandfsdev->nd_devblocksize = pp->sectorsize;
-
- size = sizeof(erasesize);
- error = g_io_getattr("NAND::blocksize", nandfsdev->nd_gconsumer, &size,
- &erasesize);
- if (error) {
- DPRINTF(VOLUMES, ("couldn't get erasesize: %d\n", error));
-
- if (error == ENOIOCTL || error == EOPNOTSUPP) {
- /*
- * We conclude that this is not NAND storage
- */
- erasesize = NANDFS_DEF_ERASESIZE;
- } else {
- DROP_GIANT();
- g_topology_lock();
- g_vfs_close(nandfsdev->nd_gconsumer);
- g_topology_unlock();
- PICKUP_GIANT();
- dev_rel(dev);
- free(nandfsdev, M_NANDFSMNT);
- return (error);
- }
- }
- nandfsdev->nd_erasesize = erasesize;
-
- DPRINTF(VOLUMES, ("%s: erasesize %x\n", __func__,
- nandfsdev->nd_erasesize));
-
- /* Register nandfs_device in list */
- SLIST_INSERT_HEAD(&nandfs_devices, nandfsdev, nd_next_device);
-
- error = nandfs_mount_base(nandfsdev, mp, args);
- if (error) {
- /* Remove all our information */
- nandfs_unmount_device(nandfsdev);
- return (EINVAL);
- }
-
- nandfsdev->nd_maxfilesize = nandfs_get_maxfilesize(nandfsdev);
-
- *nandfsdev_p = nandfsdev;
- DPRINTF(VOLUMES, ("NANDFS device mounted ok\n"));
-
- return (0);
-}
-
-static int
-nandfs_mount_checkpoint(struct nandfsmount *nmp)
-{
- struct nandfs_cpfile_header *cphdr;
- struct nandfs_checkpoint *cp;
- struct nandfs_inode ifile_inode;
- struct nandfs_node *cp_node;
- struct buf *bp;
- uint64_t ncp, nsn, cpno, fcpno, blocknr, last_cno;
- uint32_t off, dlen;
- int cp_per_block, error;
-
- cpno = nmp->nm_mount_args.cpno;
- if (cpno == 0)
- cpno = nmp->nm_nandfsdev->nd_super.s_last_cno;
-
- DPRINTF(VOLUMES, ("%s: trying to mount checkpoint number %"PRIu64"\n",
- __func__, cpno));
-
- cp_node = nmp->nm_nandfsdev->nd_cp_node;
-
- VOP_LOCK(NTOV(cp_node), LK_SHARED);
- /* Get cpfile header from 1st block of cp file */
- error = nandfs_bread(cp_node, 0, NOCRED, 0, &bp);
- if (error) {
- brelse(bp);
- VOP_UNLOCK(NTOV(cp_node), 0);
- return (error);
- }
-
- cphdr = (struct nandfs_cpfile_header *) bp->b_data;
- ncp = cphdr->ch_ncheckpoints;
- nsn = cphdr->ch_nsnapshots;
-
- brelse(bp);
-
- DPRINTF(VOLUMES, ("mount_nandfs: checkpoint header read in\n"));
- DPRINTF(VOLUMES, ("\tNumber of checkpoints %"PRIu64"\n", ncp));
- DPRINTF(VOLUMES, ("\tNumber of snapshots %"PRIu64"\n", nsn));
-
- /* Read in our specified checkpoint */
- dlen = nmp->nm_nandfsdev->nd_fsdata.f_checkpoint_size;
- cp_per_block = nmp->nm_nandfsdev->nd_blocksize / dlen;
-
- fcpno = cpno + NANDFS_CPFILE_FIRST_CHECKPOINT_OFFSET - 1;
- blocknr = fcpno / cp_per_block;
- off = (fcpno % cp_per_block) * dlen;
- error = nandfs_bread(cp_node, blocknr, NOCRED, 0, &bp);
- if (error) {
- brelse(bp);
- VOP_UNLOCK(NTOV(cp_node), 0);
- printf("mount_nandfs: couldn't read cp block %"PRIu64"\n",
- fcpno);
- return (EINVAL);
- }
-
- /* Needs to be a valid checkpoint */
- cp = (struct nandfs_checkpoint *) ((uint8_t *) bp->b_data + off);
- if (cp->cp_flags & NANDFS_CHECKPOINT_INVALID) {
- printf("mount_nandfs: checkpoint marked invalid\n");
- brelse(bp);
- VOP_UNLOCK(NTOV(cp_node), 0);
- return (EINVAL);
- }
-
- /* Is this really the checkpoint we want? */
- if (cp->cp_cno != cpno) {
- printf("mount_nandfs: checkpoint file corrupt? "
- "expected cpno %"PRIu64", found cpno %"PRIu64"\n",
- cpno, cp->cp_cno);
- brelse(bp);
- VOP_UNLOCK(NTOV(cp_node), 0);
- return (EINVAL);
- }
-
- /* Check if it's a snapshot ! */
- last_cno = nmp->nm_nandfsdev->nd_super.s_last_cno;
- if (cpno != last_cno) {
- /* Only allow snapshots if not mounting on the last cp */
- if ((cp->cp_flags & NANDFS_CHECKPOINT_SNAPSHOT) == 0) {
- printf( "mount_nandfs: checkpoint %"PRIu64" is not a "
- "snapshot\n", cpno);
- brelse(bp);
- VOP_UNLOCK(NTOV(cp_node), 0);
- return (EINVAL);
- }
- }
-
- ifile_inode = cp->cp_ifile_inode;
- brelse(bp);
-
- /* Get ifile inode */
- error = nandfs_get_node_raw(nmp->nm_nandfsdev, NULL, NANDFS_IFILE_INO,
- &ifile_inode, &nmp->nm_ifile_node);
- if (error) {
- printf("mount_nandfs: can't read ifile node\n");
- VOP_UNLOCK(NTOV(cp_node), 0);
- return (EINVAL);
- }
-
- NANDFS_SET_SYSTEMFILE(NTOV(nmp->nm_ifile_node));
- VOP_UNLOCK(NTOV(cp_node), 0);
- /* Get root node? */
-
- return (0);
-}
-
-static void
-free_nandfs_mountinfo(struct mount *mp)
-{
- struct nandfsmount *nmp = VFSTONANDFS(mp);
-
- if (nmp == NULL)
- return;
-
- free(nmp, M_NANDFSMNT);
-}
-
-void
-nandfs_wakeup_wait_sync(struct nandfs_device *nffsdev, int reason)
-{
- char *reasons[] = {
- "umount",
- "vfssync",
- "bdflush",
- "fforce",
- "fsync",
- "ro_upd"
- };
-
- DPRINTF(SYNC, ("%s: %s\n", __func__, reasons[reason]));
- mtx_lock(&nffsdev->nd_sync_mtx);
- if (nffsdev->nd_syncing)
- cv_wait(&nffsdev->nd_sync_cv, &nffsdev->nd_sync_mtx);
- if (reason == SYNCER_UMOUNT)
- nffsdev->nd_syncer_exit = 1;
- nffsdev->nd_syncing = 1;
- wakeup(&nffsdev->nd_syncing);
- cv_wait(&nffsdev->nd_sync_cv, &nffsdev->nd_sync_mtx);
-
- mtx_unlock(&nffsdev->nd_sync_mtx);
-}
-
-static void
-nandfs_gc_finished(struct nandfs_device *nffsdev, int exit)
-{
- int error;
-
- mtx_lock(&nffsdev->nd_sync_mtx);
- nffsdev->nd_syncing = 0;
- DPRINTF(SYNC, ("%s: cleaner finish\n", __func__));
- cv_broadcast(&nffsdev->nd_sync_cv);
- mtx_unlock(&nffsdev->nd_sync_mtx);
- if (!exit) {
- error = tsleep(&nffsdev->nd_syncing, PRIBIO, "-",
- hz * nandfs_sync_interval);
- DPRINTF(SYNC, ("%s: cleaner waked up: %d\n",
- __func__, error));
- }
-}
-
-static void
-nandfs_syncer(struct nandfsmount *nmp)
-{
- struct nandfs_device *nffsdev;
- struct mount *mp;
- int flags, error;
-
- mp = nmp->nm_vfs_mountp;
- nffsdev = nmp->nm_nandfsdev;
- tsleep(&nffsdev->nd_syncing, PRIBIO, "-", hz * nandfs_sync_interval);
-
- while (!nffsdev->nd_syncer_exit) {
- DPRINTF(SYNC, ("%s: syncer run\n", __func__));
- nffsdev->nd_syncing = 1;
-
- flags = (nmp->nm_flags & (NANDFS_FORCE_SYNCER | NANDFS_UMOUNT));
-
- error = nandfs_segment_constructor(nmp, flags);
- if (error)
- nandfs_error("%s: error:%d when creating segments\n",
- __func__, error);
-
- nmp->nm_flags &= ~flags;
-
- nandfs_gc_finished(nffsdev, 0);
- }
-
- MPASS(nffsdev->nd_cleaner == NULL);
- error = nandfs_segment_constructor(nmp,
- NANDFS_FORCE_SYNCER | NANDFS_UMOUNT);
- if (error)
- nandfs_error("%s: error:%d when creating segments\n",
- __func__, error);
- nandfs_gc_finished(nffsdev, 1);
- nffsdev->nd_syncer = NULL;
- MPASS(nffsdev->nd_free_base == NULL);
-
- DPRINTF(SYNC, ("%s: exiting\n", __func__));
- kthread_exit();
-}
-
-static int
-start_syncer(struct nandfsmount *nmp)
-{
- int error;
-
- MPASS(nmp->nm_nandfsdev->nd_syncer == NULL);
-
- DPRINTF(SYNC, ("%s: start syncer\n", __func__));
-
- nmp->nm_nandfsdev->nd_syncer_exit = 0;
-
- error = kthread_add((void(*)(void *))nandfs_syncer, nmp, NULL,
- &nmp->nm_nandfsdev->nd_syncer, 0, 0, "nandfs_syncer");
-
- if (error)
- printf("nandfs: could not start syncer: %d\n", error);
-
- return (error);
-}
-
-static int
-stop_syncer(struct nandfsmount *nmp)
-{
-
- MPASS(nmp->nm_nandfsdev->nd_syncer != NULL);
-
- nandfs_wakeup_wait_sync(nmp->nm_nandfsdev, SYNCER_UMOUNT);
-
- DPRINTF(SYNC, ("%s: stop syncer\n", __func__));
- return (0);
-}
-
-/*
- * Mount null layer
- */
-static int
-nandfs_mount(struct mount *mp)
-{
- struct nandfsmount *nmp;
- struct vnode *devvp;
- struct nameidata nd;
- struct vfsoptlist *opts;
- struct thread *td;
- char *from;
- int error = 0, flags;
-
- DPRINTF(VOLUMES, ("%s: mp = %p\n", __func__, (void *)mp));
-
- td = curthread;
- opts = mp->mnt_optnew;
-
- if (vfs_filteropt(opts, nandfs_opts))
- return (EINVAL);
-
- /*
- * Update is a no-op
- */
- if (mp->mnt_flag & MNT_UPDATE) {
- nmp = VFSTONANDFS(mp);
- if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) {
- return (error);
- }
- if (!(nmp->nm_ronly) && vfs_flagopt(opts, "ro", NULL, 0)) {
- vn_start_write(NULL, &mp, V_WAIT);
- error = VFS_SYNC(mp, MNT_WAIT);
- if (error)
- return (error);
- vn_finished_write(mp);
-
- flags = WRITECLOSE;
- if (mp->mnt_flag & MNT_FORCE)
- flags |= FORCECLOSE;
-
- nandfs_wakeup_wait_sync(nmp->nm_nandfsdev,
- SYNCER_ROUPD);
- error = vflush(mp, 0, flags, td);
- if (error)
- return (error);
-
- nandfs_stop_cleaner(nmp->nm_nandfsdev);
- stop_syncer(nmp);
- DROP_GIANT();
- g_topology_lock();
- g_access(nmp->nm_nandfsdev->nd_gconsumer, 0, -1, 0);
- g_topology_unlock();
- PICKUP_GIANT();
- MNT_ILOCK(mp);
- mp->mnt_flag |= MNT_RDONLY;
- MNT_IUNLOCK(mp);
- nmp->nm_ronly = 1;
-
- } else if ((nmp->nm_ronly) &&
- !vfs_flagopt(opts, "ro", NULL, 0)) {
- /*
- * Don't allow read-write snapshots.
- */
- if (nmp->nm_mount_args.cpno != 0)
- return (EROFS);
- /*
- * If upgrade to read-write by non-root, then verify
- * that user has necessary permissions on the device.
- */
- devvp = nmp->nm_nandfsdev->nd_devvp;
- vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
- error = VOP_ACCESS(devvp, VREAD | VWRITE,
- td->td_ucred, td);
- if (error) {
- error = priv_check(td, PRIV_VFS_MOUNT_PERM);
- if (error) {
- VOP_UNLOCK(devvp, 0);
- return (error);
- }
- }
-
- VOP_UNLOCK(devvp, 0);
- DROP_GIANT();
- g_topology_lock();
- error = g_access(nmp->nm_nandfsdev->nd_gconsumer, 0, 1,
- 0);
- g_topology_unlock();
- PICKUP_GIANT();
- if (error)
- return (error);
-
- MNT_ILOCK(mp);
- mp->mnt_flag &= ~MNT_RDONLY;
- MNT_IUNLOCK(mp);
- error = start_syncer(nmp);
- if (error == 0)
- error = nandfs_start_cleaner(nmp->nm_nandfsdev);
- if (error) {
- DROP_GIANT();
- g_topology_lock();
- g_access(nmp->nm_nandfsdev->nd_gconsumer, 0, -1,
- 0);
- g_topology_unlock();
- PICKUP_GIANT();
- return (error);
- }
-
- nmp->nm_ronly = 0;
- }
- return (0);
- }
-
- from = vfs_getopts(opts, "from", &error);
- if (error)
- return (error);
-
- /*
- * Find device node
- */
- NDINIT(&nd, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, from, curthread);
- error = namei(&nd);
- if (error)
- return (error);
- NDFREE(&nd, NDF_ONLY_PNBUF);
-
- devvp = nd.ni_vp;
-
- if (!vn_isdisk(devvp, &error)) {
- vput(devvp);
- return (error);
- }
-
- /* Check the access rights on the mount device */
- error = VOP_ACCESS(devvp, VREAD, curthread->td_ucred, curthread);
- if (error)
- error = priv_check(curthread, PRIV_VFS_MOUNT_PERM);
- if (error) {
- vput(devvp);
- return (error);
- }
-
- vfs_getnewfsid(mp);
-
- error = nandfs_mountfs(devvp, mp);
- if (error)
- return (error);
- vfs_mountedfrom(mp, from);
-
- return (0);
-}
-
-static int
-nandfs_mountfs(struct vnode *devvp, struct mount *mp)
-{
- struct nandfsmount *nmp = NULL;
- struct nandfs_args *args = NULL;
- struct nandfs_device *nandfsdev;
- char *from;
- int error, ronly;
- char *cpno;
-
- ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
-
- if (devvp->v_rdev->si_iosize_max != 0)
- mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
- VOP_UNLOCK(devvp, 0);
-
- if (mp->mnt_iosize_max > MAXPHYS)
- mp->mnt_iosize_max = MAXPHYS;
-
- from = vfs_getopts(mp->mnt_optnew, "from", &error);
- if (error)
- goto error;
-
- error = vfs_getopt(mp->mnt_optnew, "snap", (void **)&cpno, NULL);
- if (error == ENOENT)
- cpno = NULL;
- else if (error)
- goto error;
-
- args = (struct nandfs_args *)malloc(sizeof(struct nandfs_args),
- M_NANDFSMNT, M_WAITOK | M_ZERO);
-
- if (cpno != NULL)
- args->cpno = strtoul(cpno, (char **)NULL, 10);
- else
- args->cpno = 0;
- args->fspec = from;
-
- if (args->cpno != 0 && !ronly) {
- error = EROFS;
- goto error;
- }
-
- printf("WARNING: NANDFS is considered to be a highly experimental "
- "feature in FreeBSD.\n");
-
- error = nandfs_mount_device(devvp, mp, args, &nandfsdev);
- if (error)
- goto error;
-
- nmp = (struct nandfsmount *) malloc(sizeof(struct nandfsmount),
- M_NANDFSMNT, M_WAITOK | M_ZERO);
-
- mp->mnt_data = nmp;
- nmp->nm_vfs_mountp = mp;
- nmp->nm_ronly = ronly;
- MNT_ILOCK(mp);
- mp->mnt_flag |= MNT_LOCAL;
- mp->mnt_kern_flag |= MNTK_USES_BCACHE;
- MNT_IUNLOCK(mp);
- nmp->nm_nandfsdev = nandfsdev;
- /* Add our mountpoint */
- STAILQ_INSERT_TAIL(&nandfsdev->nd_mounts, nmp, nm_next_mount);
-
- if (args->cpno > nandfsdev->nd_last_cno) {
- printf("WARNING: supplied checkpoint number (%jd) is greater "
- "than last known checkpoint on filesystem (%jd). Mounting"
- " checkpoint %jd\n", (uintmax_t)args->cpno,
- (uintmax_t)nandfsdev->nd_last_cno,
- (uintmax_t)nandfsdev->nd_last_cno);
- args->cpno = nandfsdev->nd_last_cno;
- }
-
- /* Setting up other parameters */
- nmp->nm_mount_args = *args;
- free(args, M_NANDFSMNT);
- error = nandfs_mount_checkpoint(nmp);
- if (error) {
- nandfs_unmount(mp, MNT_FORCE);
- goto unmounted;
- }
-
- if (!ronly) {
- error = start_syncer(nmp);
- if (error == 0)
- error = nandfs_start_cleaner(nmp->nm_nandfsdev);
- if (error)
- nandfs_unmount(mp, MNT_FORCE);
- }
-
- return (0);
-
-error:
- if (args != NULL)
- free(args, M_NANDFSMNT);
-
- if (nmp != NULL) {
- free(nmp, M_NANDFSMNT);
- mp->mnt_data = NULL;
- }
-unmounted:
- return (error);
-}
-
-static int
-nandfs_unmount(struct mount *mp, int mntflags)
-{
- struct nandfs_device *nandfsdev;
- struct nandfsmount *nmp;
- int error;
- int flags = 0;
-
- DPRINTF(VOLUMES, ("%s: mp = %p\n", __func__, (void *)mp));
-
- if (mntflags & MNT_FORCE)
- flags |= FORCECLOSE;
-
- nmp = mp->mnt_data;
- nandfsdev = nmp->nm_nandfsdev;
-
- error = vflush(mp, 0, flags | SKIPSYSTEM, curthread);
- if (error)
- return (error);
-
- if (!(nmp->nm_ronly)) {
- nandfs_stop_cleaner(nandfsdev);
- stop_syncer(nmp);
- }
-
- if (nmp->nm_ifile_node)
- NANDFS_UNSET_SYSTEMFILE(NTOV(nmp->nm_ifile_node));
-
- /* Remove our mount point */
- STAILQ_REMOVE(&nandfsdev->nd_mounts, nmp, nandfsmount, nm_next_mount);
-
- /* Unmount the device itself when we're the last one */
- nandfs_unmount_device(nandfsdev);
-
- free_nandfs_mountinfo(mp);
-
- /*
- * Finally, throw away the null_mount structure
- */
- mp->mnt_data = 0;
- MNT_ILOCK(mp);
- mp->mnt_flag &= ~MNT_LOCAL;
- MNT_IUNLOCK(mp);
-
- return (0);
-}
-
-static int
-nandfs_statfs(struct mount *mp, struct statfs *sbp)
-{
- struct nandfsmount *nmp;
- struct nandfs_device *nandfsdev;
- struct nandfs_fsdata *fsdata;
- struct nandfs_super_block *sb;
- struct nandfs_block_group_desc *groups;
- struct nandfs_node *ifile;
- struct nandfs_mdt *mdt;
- struct buf *bp;
- int i, error;
- uint32_t entries_per_group;
- uint64_t files = 0;
-
- nmp = mp->mnt_data;
- nandfsdev = nmp->nm_nandfsdev;
- fsdata = &nandfsdev->nd_fsdata;
- sb = &nandfsdev->nd_super;
- ifile = nmp->nm_ifile_node;
- mdt = &nandfsdev->nd_ifile_mdt;
- entries_per_group = mdt->entries_per_group;
-
- VOP_LOCK(NTOV(ifile), LK_SHARED);
- error = nandfs_bread(ifile, 0, NOCRED, 0, &bp);
- if (error) {
- brelse(bp);
- VOP_UNLOCK(NTOV(ifile), 0);
- return (error);
- }
-
- groups = (struct nandfs_block_group_desc *)bp->b_data;
-
- for (i = 0; i < mdt->groups_per_desc_block; i++)
- files += (entries_per_group - groups[i].bg_nfrees);
-
- brelse(bp);
- VOP_UNLOCK(NTOV(ifile), 0);
-
- sbp->f_bsize = nandfsdev->nd_blocksize;
- sbp->f_iosize = sbp->f_bsize;
- sbp->f_blocks = fsdata->f_blocks_per_segment * fsdata->f_nsegments;
- sbp->f_bfree = sb->s_free_blocks_count;
- sbp->f_bavail = sbp->f_bfree;
- sbp->f_files = files;
- sbp->f_ffree = 0;
- return (0);
-}
-
-static int
-nandfs_root(struct mount *mp, int flags, struct vnode **vpp)
-{
- struct nandfsmount *nmp = VFSTONANDFS(mp);
- struct nandfs_node *node;
- int error;
-
- error = nandfs_get_node(nmp, NANDFS_ROOT_INO, &node);
- if (error)
- return (error);
-
- KASSERT(NTOV(node)->v_vflag & VV_ROOT,
- ("root_vp->v_vflag & VV_ROOT"));
-
- *vpp = NTOV(node);
-
- return (error);
-}
-
-static int
-nandfs_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
-{
- struct nandfsmount *nmp = VFSTONANDFS(mp);
- struct nandfs_node *node;
- int error;
-
- error = nandfs_get_node(nmp, ino, &node);
- if (node)
- *vpp = NTOV(node);
-
- return (error);
-}
-
-static int
-nandfs_sync(struct mount *mp, int waitfor)
-{
- struct nandfsmount *nmp = VFSTONANDFS(mp);
-
- DPRINTF(SYNC, ("%s: mp %p waitfor %d\n", __func__, mp, waitfor));
-
- /*
- * XXX: A hack to be removed soon
- */
- if (waitfor == MNT_LAZY)
- return (0);
- if (waitfor == MNT_SUSPEND)
- return (0);
- nandfs_wakeup_wait_sync(nmp->nm_nandfsdev, SYNCER_VFS_SYNC);
- return (0);
-}
-
-static struct vfsops nandfs_vfsops = {
- .vfs_init = nandfs_init,
- .vfs_mount = nandfs_mount,
- .vfs_root = nandfs_root,
- .vfs_statfs = nandfs_statfs,
- .vfs_uninit = nandfs_uninit,
- .vfs_unmount = nandfs_unmount,
- .vfs_vget = nandfs_vget,
- .vfs_sync = nandfs_sync,
-};
-
-VFS_SET(nandfs_vfsops, nandfs, VFCF_LOOPBACK);