#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/dirent.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/ubc.h>
#include <sys/vm.h>
#include <sys/vmparam.h>
#include <sys/time.h>
#include <kern/clock.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsmount.h>
#include <nfs/nqnfs.h>
#include <nfs/nfsnode.h>
#include <sys/kdebug.h>
#define FSDBG(A, B, C, D, E) \
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, (A))) | DBG_FUNC_NONE, \
(int)(B), (int)(C), (int)(D), (int)(E), 0)
#define FSDBG_TOP(A, B, C, D, E) \
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, (A))) | DBG_FUNC_START, \
(int)(B), (int)(C), (int)(D), (int)(E), 0)
#define FSDBG_BOT(A, B, C, D, E) \
KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, (A))) | DBG_FUNC_END, \
(int)(B), (int)(C), (int)(D), (int)(E), 0)
extern int nfs_numasync;
extern int nfs_ioddelwri;
extern struct nfsstats nfsstats;
#define NFSBUFHASH(dvp, lbn) \
(&nfsbufhashtbl[((long)(dvp) / sizeof(*(dvp)) + (int)(lbn)) & nfsbufhash])
LIST_HEAD(nfsbufhashhead, nfsbuf) *nfsbufhashtbl;
struct nfsbuffreehead nfsbuffree, nfsbufdelwri;
u_long nfsbufhash;
int nfsbufhashlock, nfsbufcnt, nfsbufmin, nfsbufmax;
int nfsbuffreecnt, nfsbufdelwricnt, nfsneedbuffer;
int nfs_nbdwrite;
#define NFSBUFWRITE_THROTTLE 9
void
nfs_nbinit(void)
{
nfsbufhashlock = 0;
nfsbufhashtbl = hashinit(nbuf, M_TEMP, &nfsbufhash);
TAILQ_INIT(&nfsbuffree);
TAILQ_INIT(&nfsbufdelwri);
nfsbufcnt = nfsbuffreecnt = nfsbufdelwricnt = 0;
nfsbufmin = 128; nfsbufmax = 8192; nfsneedbuffer = 0;
nfs_nbdwrite = 0;
}
static void
nfs_buf_freeup(void)
{
struct nfsbuf *fbp;
int cnt;
#define NFS_BUF_FREEUP() \
do { \
\
if ((nfsbuffreecnt > nfsbufcnt/4) && \
(nfsbufcnt-nfsbuffreecnt/8 > nfsbufmin)) \
nfs_buf_freeup(); \
} while (0)
if (nfsbuffreecnt < nfsbufcnt/4)
return;
cnt = nfsbuffreecnt/8;
if (nfsbufcnt-cnt < nfsbufmin)
return;
FSDBG(320, -1, nfsbufcnt, nfsbuffreecnt, cnt);
while (cnt-- > 0) {
fbp = TAILQ_FIRST(&nfsbuffree);
if (!fbp)
break;
nfs_buf_remfree(fbp);
if (fbp->nb_vp) {
struct vnode *oldvp;
if (fbp->nb_vnbufs.le_next != NFSNOLIST) {
LIST_REMOVE(fbp, nb_vnbufs);
fbp->nb_vnbufs.le_next = NFSNOLIST;
}
oldvp = fbp->nb_vp;
fbp->nb_vp = NULL;
HOLDRELE(oldvp);
}
LIST_REMOVE(fbp, nb_hash);
if (fbp->nb_rcred != NOCRED)
crfree(fbp->nb_rcred);
if (fbp->nb_wcred != NOCRED)
crfree(fbp->nb_wcred);
if (ISSET(fbp->nb_flags, NB_META) && fbp->nb_data) {
FREE(fbp->nb_data, M_TEMP);
}
FREE(fbp, M_TEMP);
nfsbufcnt--;
}
FSDBG(320, -1, nfsbufcnt, nfsbuffreecnt, cnt);
}
void
nfs_buf_remfree(struct nfsbuf *bp)
{
if (bp->nb_free.tqe_next == NFSNOLIST)
panic("nfsbuf not on free list");
if (ISSET(bp->nb_flags, NB_DELWRI)) {
nfsbufdelwricnt--;
TAILQ_REMOVE(&nfsbufdelwri, bp, nb_free);
} else {
nfsbuffreecnt--;
TAILQ_REMOVE(&nfsbuffree, bp, nb_free);
}
bp->nb_free.tqe_next = NFSNOLIST;
NFSBUFCNTCHK();
}
struct nfsbuf *
nfs_buf_incore(struct vnode *vp, daddr_t blkno)
{
struct nfsbuf * bp = NFSBUFHASH(vp, blkno)->lh_first;
for (; bp != NULL; bp = bp->nb_hash.le_next)
if (bp->nb_lblkno == blkno && bp->nb_vp == vp &&
!ISSET(bp->nb_flags, NB_INVAL)) {
FSDBG(547, bp, blkno, bp->nb_flags, bp->nb_vp);
return (bp);
}
return (NULL);
}
int
nfs_buf_page_inval(struct vnode *vp, off_t offset)
{
struct nfsbuf *bp;
bp = nfs_buf_incore(vp, ubc_offtoblk(vp, offset));
if (!bp)
return (0);
FSDBG(325, bp, bp->nb_flags, bp->nb_dirtyoff, bp->nb_dirtyend);
if (ISSET(bp->nb_flags, NB_BUSY))
return (EBUSY);
if (bp->nb_dirtyend > 0) {
int start = offset - NBOFF(bp);
if (bp->nb_dirtyend <= start ||
bp->nb_dirtyoff >= (start + PAGE_SIZE))
return (0);
return (EBUSY);
}
return (0);
}
int
nfs_buf_upl_setup(struct nfsbuf *bp)
{
kern_return_t kret;
upl_t upl;
int s;
if (ISSET(bp->nb_flags, NB_PAGELIST))
return (0);
kret = ubc_create_upl(bp->nb_vp, NBOFF(bp), bp->nb_bufsize,
&upl, NULL, UPL_PRECIOUS);
if (kret == KERN_INVALID_ARGUMENT) {
bp->nb_pagelist = NULL;
return (EINVAL);
}
if (kret != KERN_SUCCESS) {
printf("nfs_buf_upl_setup(): failed to get pagelist %d\n", kret);
bp->nb_pagelist = NULL;
return (EIO);
}
FSDBG(538, bp, NBOFF(bp), bp->nb_bufsize, bp->nb_vp);
s = splbio();
bp->nb_pagelist = upl;
SET(bp->nb_flags, NB_PAGELIST);
splx(s);
return (0);
}
void
nfs_buf_upl_check(struct nfsbuf *bp)
{
upl_page_info_t *pl;
off_t filesize, fileoffset;
int i, npages;
if (!ISSET(bp->nb_flags, NB_PAGELIST))
return;
npages = round_page_32(bp->nb_bufsize) / PAGE_SIZE;
filesize = ubc_getsize(bp->nb_vp);
fileoffset = NBOFF(bp);
if (fileoffset < filesize)
SET(bp->nb_flags, NB_CACHE);
else
CLR(bp->nb_flags, NB_CACHE);
pl = ubc_upl_pageinfo(bp->nb_pagelist);
bp->nb_valid = bp->nb_dirty = 0;
for (i=0; i < npages; i++, fileoffset += PAGE_SIZE_64) {
if (fileoffset >= filesize)
break;
if (!upl_valid_page(pl, i)) {
CLR(bp->nb_flags, NB_CACHE);
continue;
}
NBPGVALID_SET(bp,i);
if (upl_dirty_page(pl, i)) {
NBPGDIRTY_SET(bp, i);
if (!ISSET(bp->nb_flags, NB_WASDIRTY))
SET(bp->nb_flags, NB_WASDIRTY);
}
}
fileoffset = NBOFF(bp);
if (ISSET(bp->nb_flags, NB_CACHE)) {
bp->nb_validoff = 0;
bp->nb_validend = bp->nb_bufsize;
if (fileoffset + bp->nb_validend > filesize)
bp->nb_validend = filesize - fileoffset;
} else {
bp->nb_validoff = bp->nb_validend = -1;
}
FSDBG(539, bp, fileoffset, bp->nb_valid, bp->nb_dirty);
FSDBG(539, bp->nb_validoff, bp->nb_validend, bp->nb_dirtyoff, bp->nb_dirtyend);
}
static int
nfs_buf_map(struct nfsbuf *bp)
{
kern_return_t kret;
if (bp->nb_data)
return (0);
if (!ISSET(bp->nb_flags, NB_PAGELIST))
return (EINVAL);
kret = ubc_upl_map(bp->nb_pagelist, (vm_address_t *)&(bp->nb_data));
if (kret != KERN_SUCCESS)
panic("nfs_buf_map: ubc_upl_map() failed with (%d)", kret);
if (bp->nb_data == 0)
panic("ubc_upl_map mapped 0");
FSDBG(540, bp, bp->nb_flags, NBOFF(bp), bp->nb_data);
return (0);
}
static int
nfs_buf_upl_valid_range(struct nfsbuf *bp, int off, int size)
{
off_t fileoffset, filesize;
int pg, lastpg;
upl_page_info_t *pl;
if (!ISSET(bp->nb_flags, NB_PAGELIST))
return (0);
pl = ubc_upl_pageinfo(bp->nb_pagelist);
size += off & PAGE_MASK;
off &= ~PAGE_MASK;
fileoffset = NBOFF(bp);
filesize = VTONFS(bp->nb_vp)->n_size;
if ((fileoffset + off + size) > filesize)
size = filesize - (fileoffset + off);
pg = off/PAGE_SIZE;
lastpg = (off + size - 1)/PAGE_SIZE;
while (pg <= lastpg) {
if (!upl_valid_page(pl, pg))
return (0);
pg++;
}
return (1);
}
static void
nfs_buf_normalize_valid_range(struct nfsnode *np, struct nfsbuf *bp)
{
int pg, npg;
pg = bp->nb_validoff/PAGE_SIZE;
while (pg >= 0 && NBPGVALID(bp,pg))
pg--;
bp->nb_validoff = (pg+1) * PAGE_SIZE;
npg = bp->nb_bufsize/PAGE_SIZE;
pg = bp->nb_validend/PAGE_SIZE;
while (pg < npg && NBPGVALID(bp,pg))
pg++;
bp->nb_validend = pg * PAGE_SIZE;
if (NBOFF(bp) + bp->nb_validend > np->n_size)
bp->nb_validend = np->n_size % bp->nb_bufsize;
}
static void
nfs_buf_delwri_push(void)
{
struct nfsbuf *bp;
int i;
if (TAILQ_EMPTY(&nfsbufdelwri))
return;
if (nfs_asyncio(NULL, NULL) == 0)
return;
i = 0;
while (i < 8 && (bp = TAILQ_FIRST(&nfsbufdelwri)) != NULL) {
struct nfsnode *np = VTONFS(bp->nb_vp);
nfs_buf_remfree(bp);
if (ISSET(bp->nb_flags, NB_NEEDCOMMIT)) {
TAILQ_INSERT_TAIL(&nfsbufdelwri, bp, nb_free);
nfsbufdelwricnt++;
nfs_flushcommits(np->n_vnode, (struct proc *)0);
} else {
SET(bp->nb_flags, (NB_BUSY | NB_ASYNC));
nfs_buf_write(bp);
}
i++;
}
}
struct nfsbuf *
nfs_buf_get(
struct vnode *vp,
daddr_t blkno,
int size,
struct proc *p,
int operation)
{
struct nfsnode *np = VTONFS(vp);
struct nfsbuf *bp;
int i, biosize, bufsize, rv;
struct ucred *cred;
int slpflag = PCATCH;
FSDBG_TOP(541, vp, blkno, size, operation);
bufsize = size;
if (bufsize > MAXBSIZE)
panic("nfs_buf_get: buffer larger than MAXBSIZE requested");
biosize = vp->v_mount->mnt_stat.f_iosize;
if (UBCINVALID(vp) || !UBCINFOEXISTS(vp))
operation = BLK_META;
else if (bufsize < biosize)
bufsize = biosize;
if ((operation == BLK_WRITE) && (nfs_nbdwrite > ((nfsbufcnt*3)/4))) {
FSDBG_TOP(542, vp, blkno, nfs_nbdwrite, ((nfsbufcnt*3)/4));
nfs_buf_delwri_push();
tsleep(&nfs_nbdwrite, PCATCH, "nfs_nbdwrite", 1);
FSDBG_BOT(542, vp, blkno, nfs_nbdwrite, ((nfsbufcnt*3)/4));
}
loop:
if (nfsbufhashlock) {
while (nfsbufhashlock) {
nfsbufhashlock = -1;
tsleep(&nfsbufhashlock, PCATCH, "nfsbufget", 0);
if (nfs_sigintr(VFSTONFS(vp->v_mount), NULL, p))
return (NULL);
}
goto loop;
}
nfsbufhashlock = 1;
if (bp = nfs_buf_incore(vp, blkno)) {
if (ISSET(bp->nb_flags, NB_BUSY)) {
FSDBG_TOP(543, vp, blkno, bp, bp->nb_flags);
SET(bp->nb_flags, NB_WANTED);
if (nfsbufhashlock < 0) {
nfsbufhashlock = 0;
wakeup(&nfsbufhashlock);
} else
nfsbufhashlock = 0;
tsleep(bp, slpflag|(PRIBIO+1), "nfsbufget", (slpflag == PCATCH) ? 0 : 2*hz);
slpflag = 0;
FSDBG_BOT(543, vp, blkno, bp, bp->nb_flags);
if (nfs_sigintr(VFSTONFS(vp->v_mount), NULL, p)) {
FSDBG_BOT(541, vp, blkno, 0, EINTR);
return (NULL);
}
goto loop;
}
if (bp->nb_bufsize != bufsize)
panic("nfsbuf size mismatch");
SET(bp->nb_flags, (NB_BUSY | NB_CACHE));
nfs_buf_remfree(bp);
if (ISSET(bp->nb_flags, NB_PAGELIST))
panic("pagelist buffer was not busy");
goto buffer_setup;
}
if ((nfsbufcnt > nfsbufmin) && !TAILQ_EMPTY(&nfsbuffree)) {
bp = TAILQ_FIRST(&nfsbuffree);
FSDBG(544, vp, blkno, bp, bp->nb_flags);
nfs_buf_remfree(bp);
if (ISSET(bp->nb_flags, NB_DELWRI))
panic("nfs_buf_get: delwri");
SET(bp->nb_flags, NB_BUSY);
if (bp->nb_vp) {
struct vnode *oldvp;
if (bp->nb_vnbufs.le_next != NFSNOLIST) {
LIST_REMOVE(bp, nb_vnbufs);
bp->nb_vnbufs.le_next = NFSNOLIST;
}
oldvp = bp->nb_vp;
bp->nb_vp = NULL;
HOLDRELE(oldvp);
}
LIST_REMOVE(bp, nb_hash);
cred = bp->nb_rcred;
if (cred != NOCRED) {
bp->nb_rcred = NOCRED;
crfree(cred);
}
cred = bp->nb_wcred;
if (cred != NOCRED) {
bp->nb_wcred = NOCRED;
crfree(cred);
}
if ((operation != BLK_META) &&
ISSET(bp->nb_flags, NB_META) && bp->nb_data) {
FREE(bp->nb_data, M_TEMP);
bp->nb_data = NULL;
}
bp->nb_error = 0;
bp->nb_validoff = bp->nb_validend = -1;
bp->nb_dirtyoff = bp->nb_dirtyend = 0;
bp->nb_valid = 0;
bp->nb_dirty = 0;
} else if (nfsbufcnt < nfsbufmax) {
MALLOC(bp, struct nfsbuf *, sizeof(struct nfsbuf), M_TEMP, M_WAITOK);
nfsbufcnt++;
NFSBUFCNTCHK();
bzero(bp, sizeof(*bp));
bp->nb_free.tqe_next = NFSNOLIST;
bp->nb_validoff = bp->nb_validend = -1;
FSDBG(545, vp, blkno, bp, 0);
} else {
FSDBG_TOP(546, vp, blkno, nfsbufcnt, nfsbufmax);
if (nfsbufhashlock < 0) {
nfsbufhashlock = 0;
wakeup(&nfsbufhashlock);
} else
nfsbufhashlock = 0;
nfs_buf_delwri_push();
nfsneedbuffer = 1;
tsleep(&nfsneedbuffer, PCATCH, "nfsbufget", 0);
FSDBG_BOT(546, vp, blkno, nfsbufcnt, nfsbufmax);
if (nfs_sigintr(VFSTONFS(vp->v_mount), NULL, p)) {
FSDBG_BOT(541, vp, blkno, 0, EINTR);
return (NULL);
}
goto loop;
}
setup_nfsbuf:
bp->nb_flags = NB_BUSY;
bp->nb_lblkno = blkno;
LIST_INSERT_HEAD(NFSBUFHASH(vp, blkno), bp, nb_hash);
VHOLD(vp);
bp->nb_vp = vp;
LIST_INSERT_HEAD(&np->n_cleanblkhd, bp, nb_vnbufs);
buffer_setup:
switch (operation) {
case BLK_META:
SET(bp->nb_flags, NB_META);
if ((bp->nb_bufsize != bufsize) && bp->nb_data) {
FREE(bp->nb_data, M_TEMP);
bp->nb_data = NULL;
bp->nb_validoff = bp->nb_validend = -1;
bp->nb_dirtyoff = bp->nb_dirtyend = 0;
bp->nb_valid = 0;
bp->nb_dirty = 0;
CLR(bp->nb_flags, NB_CACHE);
}
if (!bp->nb_data)
MALLOC(bp->nb_data, caddr_t, bufsize, M_TEMP, M_WAITOK);
if (!bp->nb_data)
panic("nfs_buf_get: null nb_data");
bp->nb_bufsize = bufsize;
break;
case BLK_READ:
case BLK_WRITE:
if (bufsize < PAGE_SIZE)
bufsize = PAGE_SIZE;
bp->nb_bufsize = bufsize;
bp->nb_validoff = bp->nb_validend = -1;
if (UBCISVALID(vp)) {
if (nfs_buf_upl_setup(bp)) {
LIST_REMOVE(bp, nb_vnbufs);
bp->nb_vnbufs.le_next = NFSNOLIST;
bp->nb_vp = NULL;
HOLDRELE(vp);
if (bp->nb_free.tqe_next != NFSNOLIST)
panic("nfsbuf on freelist");
TAILQ_INSERT_HEAD(&nfsbuffree, bp, nb_free);
nfsbuffreecnt++;
FSDBG_BOT(541, vp, blkno, 0x2bc, EIO);
return (NULL);
}
nfs_buf_upl_check(bp);
}
break;
default:
panic("nfs_buf_get: %d unknown operation", operation);
}
if (nfsbufhashlock < 0) {
nfsbufhashlock = 0;
wakeup(&nfsbufhashlock);
} else
nfsbufhashlock = 0;
FSDBG_BOT(541, vp, blkno, bp, bp->nb_flags);
return (bp);
}
void
nfs_buf_release(struct nfsbuf *bp)
{
struct vnode *vp = bp->nb_vp;
FSDBG_TOP(548, bp, NBOFF(bp), bp->nb_flags, bp->nb_data);
FSDBG(548, bp->nb_validoff, bp->nb_validend, bp->nb_dirtyoff, bp->nb_dirtyend);
FSDBG(548, bp->nb_valid, 0, bp->nb_dirty, 0);
if (UBCINFOEXISTS(vp) && bp->nb_bufsize) {
int upl_flags;
upl_t upl;
int i, rv;
if (!ISSET(bp->nb_flags, NB_PAGELIST) && !ISSET(bp->nb_flags, NB_INVAL)) {
rv = nfs_buf_upl_setup(bp);
if (rv)
printf("nfs_buf_release: upl create failed %d\n", rv);
else
nfs_buf_upl_check(bp);
}
upl = bp->nb_pagelist;
if (!upl)
goto pagelist_cleanup_done;
if (bp->nb_data) {
if (ubc_upl_unmap(upl) != KERN_SUCCESS)
panic("ubc_upl_unmap failed");
bp->nb_data = NULL;
}
if (bp->nb_flags & (NB_ERROR | NB_INVAL)) {
if (bp->nb_flags & (NB_READ | NB_INVAL))
upl_flags = UPL_ABORT_DUMP_PAGES;
else
upl_flags = 0;
ubc_upl_abort(upl, upl_flags);
goto pagelist_cleanup_done;
}
for (i=0; i <= (bp->nb_bufsize - 1)/PAGE_SIZE; i++) {
if (!NBPGVALID(bp,i))
ubc_upl_abort_range(upl,
i*PAGE_SIZE, PAGE_SIZE,
UPL_ABORT_DUMP_PAGES |
UPL_ABORT_FREE_ON_EMPTY);
else {
if (NBPGDIRTY(bp,i))
upl_flags = UPL_COMMIT_SET_DIRTY;
else
upl_flags = UPL_COMMIT_CLEAR_DIRTY;
ubc_upl_commit_range(upl,
i*PAGE_SIZE, PAGE_SIZE,
upl_flags |
UPL_COMMIT_INACTIVATE |
UPL_COMMIT_FREE_ON_EMPTY);
}
}
pagelist_cleanup_done:
if (NBOFF(bp) + bp->nb_bufsize > VTONFS(vp)->n_size) {
int biosize = vp->v_mount->mnt_stat.f_iosize;
off_t off, size;
off = trunc_page_64(VTONFS(vp)->n_size) + PAGE_SIZE_64;
size = trunc_page_64(NBOFF(bp) + biosize) - off;
if (size)
ubc_invalidate(vp, off, size);
}
CLR(bp->nb_flags, NB_PAGELIST);
bp->nb_pagelist = NULL;
}
if (nfsneedbuffer) {
nfsneedbuffer = 0;
wakeup(&nfsneedbuffer);
}
if (ISSET(bp->nb_flags, NB_WANTED)) {
CLR(bp->nb_flags, NB_WANTED);
wakeup(bp);
}
if (ISSET(bp->nb_flags, (NB_NOCACHE|NB_ERROR)))
SET(bp->nb_flags, NB_INVAL);
if ((bp->nb_bufsize <= 0) || ISSET(bp->nb_flags, NB_INVAL)) {
if (bp->nb_vnbufs.le_next != NFSNOLIST) {
LIST_REMOVE(bp, nb_vnbufs);
bp->nb_vnbufs.le_next = NFSNOLIST;
}
bp->nb_vp = NULL;
HOLDRELE(vp);
if (ISSET(bp->nb_flags, NB_DELWRI)) {
CLR(bp->nb_flags, NB_DELWRI);
nfs_nbdwrite--;
NFSBUFCNTCHK();
wakeup((caddr_t)&nfs_nbdwrite);
}
if (bp->nb_free.tqe_next != NFSNOLIST)
panic("nfsbuf on freelist");
TAILQ_INSERT_HEAD(&nfsbuffree, bp, nb_free);
nfsbuffreecnt++;
NFS_BUF_FREEUP();
} else if (ISSET(bp->nb_flags, NB_DELWRI)) {
if (bp->nb_free.tqe_next != NFSNOLIST)
panic("nfsbuf on freelist");
TAILQ_INSERT_TAIL(&nfsbufdelwri, bp, nb_free);
nfsbufdelwricnt++;
} else {
if (bp->nb_free.tqe_next != NFSNOLIST)
panic("nfsbuf on freelist");
TAILQ_INSERT_TAIL(&nfsbuffree, bp, nb_free);
nfsbuffreecnt++;
NFS_BUF_FREEUP();
}
NFSBUFCNTCHK();
CLR(bp->nb_flags, (NB_ASYNC | NB_BUSY | NB_NOCACHE | NB_STABLE | NB_IOD));
FSDBG_BOT(548, bp, NBOFF(bp), bp->nb_flags, bp->nb_data);
}
int
nfs_buf_iowait(struct nfsbuf *bp)
{
FSDBG_TOP(549, bp, NBOFF(bp), bp->nb_flags, bp->nb_error);
while (!ISSET(bp->nb_flags, NB_DONE))
tsleep(bp, PRIBIO + 1, "nfs_buf_iowait", 0);
FSDBG_BOT(549, bp, NBOFF(bp), bp->nb_flags, bp->nb_error);
if (ISSET(bp->nb_flags, NB_EINTR)) {
CLR(bp->nb_flags, NB_EINTR);
return (EINTR);
} else if (ISSET(bp->nb_flags, NB_ERROR))
return (bp->nb_error ? bp->nb_error : EIO);
return (0);
}
void
nfs_buf_iodone(struct nfsbuf *bp)
{
struct vnode *vp;
FSDBG_TOP(550, bp, NBOFF(bp), bp->nb_flags, bp->nb_error);
if (ISSET(bp->nb_flags, NB_DONE))
panic("nfs_buf_iodone already");
SET(bp->nb_flags, NB_DONE);
CLR(bp->nb_flags, NB_WASDIRTY);
if (!ISSET(bp->nb_flags, NB_READ)) {
CLR(bp->nb_flags, NB_WRITEINPROG);
vpwakeup(bp->nb_vp);
}
vp = bp->nb_vp;
if (vp && (vp->v_flag & VTHROTTLED)
&& (vp->v_numoutput <= (NFSBUFWRITE_THROTTLE / 3))) {
vp->v_flag &= ~VTHROTTLED;
wakeup((caddr_t)&vp->v_numoutput);
}
if (ISSET(bp->nb_flags, NB_ASYNC))
nfs_buf_release(bp);
else {
CLR(bp->nb_flags, NB_WANTED);
wakeup(bp);
}
FSDBG_BOT(550, bp, NBOFF(bp), bp->nb_flags, bp->nb_error);
}
void
nfs_buf_write_delayed(struct nfsbuf *bp)
{
struct proc *p = current_proc();
struct vnode *vp = bp->nb_vp;
FSDBG_TOP(551, bp, NBOFF(bp), bp->nb_flags, 0);
FSDBG(551, bp, bp->nb_dirtyoff, bp->nb_dirtyend, bp->nb_dirty);
if (!ISSET(bp->nb_flags, NB_DELWRI)) {
SET(bp->nb_flags, NB_DELWRI);
if (p && p->p_stats)
p->p_stats->p_ru.ru_oublock++;
nfs_nbdwrite++;
NFSBUFCNTCHK();
if (bp->nb_vnbufs.le_next != NFSNOLIST)
LIST_REMOVE(bp, nb_vnbufs);
LIST_INSERT_HEAD(&VTONFS(vp)->n_dirtyblkhd, bp, nb_vnbufs);
}
while (vp->v_numoutput >= NFSBUFWRITE_THROTTLE) {
vp->v_flag |= VTHROTTLED;
tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "nfs_buf_write_delayed", 0);
}
if (nfs_nbdwrite < 0)
panic("nfs_buf_write_delayed: Negative nfs_nbdwrite");
if (nfs_nbdwrite > ((nfsbufcnt/4)*3)) {
SET(bp->nb_flags, NB_ASYNC);
nfs_buf_write(bp);
FSDBG_BOT(551, bp, NBOFF(bp), bp->nb_flags, bp->nb_error);
return;
}
SET(bp->nb_flags, NB_DONE);
nfs_buf_release(bp);
FSDBG_BOT(551, bp, NBOFF(bp), bp->nb_flags, 0);
return;
}
int
nfs_bioread(vp, uio, ioflag, cred, getpages)
register struct vnode *vp;
register struct uio *uio;
int ioflag;
struct ucred *cred;
int getpages; {
struct nfsnode *np = VTONFS(vp);
int biosize, i;
off_t diff;
struct nfsbuf *bp = 0, *rabp;
struct vattr vattr;
struct proc *p;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
daddr_t lbn, rabn, lastrabn = -1;
int bufsize;
int nra, error = 0, n = 0, on = 0;
int operation = (getpages? BLK_PAGEIN : BLK_READ);
caddr_t dp;
struct dirent *direntp;
FSDBG_TOP(514, vp, uio->uio_offset, uio->uio_resid, ioflag);
#if DIAGNOSTIC
if (uio->uio_rw != UIO_READ)
panic("nfs_read mode");
#endif
if (uio->uio_resid == 0) {
FSDBG_BOT(514, vp, 0xd1e0001, 0, 0);
return (0);
}
if (uio->uio_offset < 0) {
FSDBG_BOT(514, vp, 0xd1e0002, 0, EINVAL);
return (EINVAL);
}
p = uio->uio_procp;
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
!(nmp->nm_state & NFSSTA_GOTFSINFO))
(void)nfs_fsinfo(nmp, vp, cred, p);
biosize = vp->v_mount->mnt_stat.f_iosize;
if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) {
if (np->n_flag & NMODIFIED) {
if (vp->v_type != VREG) {
if (vp->v_type != VDIR)
panic("nfs: bioread, not dir");
nfs_invaldir(vp);
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0003, 0, error);
return (error);
}
}
np->n_xid = 0;
error = VOP_GETATTR(vp, &vattr, cred, p);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0004, 0, error);
return (error);
}
np->n_mtime = vattr.va_mtime.tv_sec;
} else {
error = VOP_GETATTR(vp, &vattr, cred, p);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0005, 0, error);
return (error);
}
if (np->n_mtime != vattr.va_mtime.tv_sec) {
if (vp->v_type == VDIR) {
nfs_invaldir(vp);
cache_purge(vp);
}
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0006, 0, error);
return (error);
}
np->n_mtime = vattr.va_mtime.tv_sec;
}
}
}
do {
if (nmp->nm_flag & NFSMNT_NQNFS) {
if (NQNFS_CKINVALID(vp, np, ND_READ)) {
do {
error = nqnfs_getlease(vp, ND_READ, cred, p);
} while (error == NQNFS_EXPIRED);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0007, 0, error);
return (error);
}
if (np->n_lrev != np->n_brev ||
(np->n_flag & NQNFSNONCACHE) ||
((np->n_flag & NMODIFIED) && vp->v_type == VDIR)) {
if (vp->v_type == VDIR)
nfs_invaldir(vp);
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0008, 0, error);
return (error);
}
np->n_brev = np->n_lrev;
}
} else if (vp->v_type == VDIR && (np->n_flag & NMODIFIED)) {
nfs_invaldir(vp);
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(514, vp, 0xd1e0009, 0, error);
return (error);
}
}
}
if ((np->n_flag & NQNFSNONCACHE) || (vp->v_flag & VNOCACHE_DATA)) {
if ((vp->v_flag & VNOCACHE_DATA) &&
(np->n_dirtyblkhd.lh_first || np->n_cleanblkhd.lh_first)) {
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(514, vp, 0xd1e000a, 0, error);
return (error);
}
}
switch (vp->v_type) {
case VREG:
error = nfs_readrpc(vp, uio, cred);
FSDBG_BOT(514, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
case VLNK:
error = nfs_readlinkrpc(vp, uio, cred);
FSDBG_BOT(514, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
case VDIR:
break;
default:
printf(" NQNFSNONCACHE: type %x unexpected\n", vp->v_type);
};
}
switch (vp->v_type) {
case VREG:
lbn = uio->uio_offset / biosize;
if (uio->uio_segflg == UIO_USERSPACE) {
int io_resid = uio->uio_resid;
diff = np->n_size - uio->uio_offset;
if (diff < io_resid)
io_resid = diff;
if (io_resid > 0) {
error = cluster_copy_ubc_data(vp, uio, &io_resid, 0);
if (error) {
FSDBG_BOT(514, vp, uio->uio_offset, 0xcacefeed, error);
return (error);
}
}
if (lbn != uio->uio_offset / biosize) {
nfsstats.biocache_reads += (uio->uio_offset / biosize) - lbn;
FSDBG(514, vp, 0xcacefeed, uio->uio_offset, error);
}
}
lbn = uio->uio_offset / biosize;
on = uio->uio_offset % biosize;
if (nfs_numasync > 0 && nmp->nm_readahead > 0) {
for (nra = 0; nra < nmp->nm_readahead; nra++) {
rabn = lbn + 1 + nra;
if (rabn <= lastrabn) {
continue;
}
lastrabn = rabn;
if ((off_t)rabn * biosize >= np->n_size)
break;
rabp = nfs_buf_incore(vp, rabn);
if (rabp && nfs_buf_upl_valid_range(rabp, 0, rabp->nb_bufsize))
continue;
rabp = nfs_buf_get(vp, rabn, biosize, p, operation);
if (!rabp) {
FSDBG_BOT(514, vp, 0xd1e000b, 0, EINTR);
return (EINTR);
}
if (!ISSET(rabp->nb_flags, (NB_CACHE|NB_DELWRI))) {
SET(rabp->nb_flags, (NB_READ|NB_ASYNC));
if (nfs_asyncio(rabp, cred)) {
SET(rabp->nb_flags, (NB_INVAL|NB_ERROR));
rabp->nb_error = EIO;
nfs_buf_release(rabp);
}
} else
nfs_buf_release(rabp);
}
}
if ((uio->uio_resid <= 0) || (uio->uio_offset >= np->n_size)) {
FSDBG_BOT(514, vp, uio->uio_offset, uio->uio_resid, 0xaaaaaaaa);
return (0);
}
nfsstats.biocache_reads++;
again:
bufsize = biosize;
n = min((unsigned)(bufsize - on), uio->uio_resid);
diff = np->n_size - uio->uio_offset;
if (diff < n)
n = diff;
bp = nfs_buf_get(vp, lbn, bufsize, p, operation);
if (!bp) {
FSDBG_BOT(514, vp, 0xd1e000c, 0, EINTR);
return (EINTR);
}
if (bp->nb_valid) {
int pg, firstpg, lastpg, dirtypg;
dirtypg = firstpg = lastpg = -1;
pg = on/PAGE_SIZE;
while (pg <= (on + n - 1)/PAGE_SIZE) {
if (!NBPGVALID(bp,pg)) {
if (firstpg < 0)
firstpg = pg;
lastpg = pg;
} else if (firstpg >= 0 && dirtypg < 0 && NBPGDIRTY(bp,pg))
dirtypg = pg;
pg++;
}
if (firstpg < 0) {
if (bp->nb_validoff < 0) {
bp->nb_validoff = trunc_page_32(on);
bp->nb_validend = round_page_32(on+n);
nfs_buf_normalize_valid_range(np, bp);
}
goto buffer_ready;
}
if ((dirtypg > firstpg) && (dirtypg < lastpg)) {
CLR(bp->nb_flags, (NB_DONE | NB_ERROR | NB_INVAL));
SET(bp->nb_flags, NB_ASYNC);
if (bp->nb_wcred == NOCRED)
bp->nb_wcred = crdup(cred);
error = nfs_buf_write(bp);
if (error) {
FSDBG_BOT(514, vp, 0xd1e000d, 0, error);
return (error);
}
goto again;
}
if (!bp->nb_dirty && bp->nb_dirtyend <= 0 &&
(lastpg - firstpg + 1) > (bufsize/PAGE_SIZE)/2) {
bp->nb_valid = 0;
} else {
struct iovec iov;
struct uio auio;
auio.uio_iov = &iov;
auio.uio_iovcnt = 1;
auio.uio_offset = NBOFF(bp) + firstpg * PAGE_SIZE_64;
auio.uio_resid = (lastpg - firstpg + 1) * PAGE_SIZE;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_rw = UIO_READ;
auio.uio_procp = p;
NFS_BUF_MAP(bp);
iov.iov_base = bp->nb_data + firstpg * PAGE_SIZE;
iov.iov_len = auio.uio_resid;
error = nfs_readrpc(vp, &auio, cred);
if (error) {
nfs_buf_release(bp);
FSDBG_BOT(514, vp, 0xd1e000e, 0, error);
return (error);
}
bp->nb_validoff = trunc_page_32(on);
bp->nb_validend = round_page_32(on+n);
nfs_buf_normalize_valid_range(np, bp);
if (auio.uio_resid > 0) {
bzero(iov.iov_base, auio.uio_resid);
}
for (pg=firstpg; pg <= lastpg; pg++)
NBPGVALID_SET(bp,pg);
}
}
if (!bp->nb_valid) {
SET(bp->nb_flags, NB_READ);
CLR(bp->nb_flags, (NB_DONE | NB_ERROR | NB_INVAL));
error = nfs_doio(bp, cred, p);
if (error) {
nfs_buf_release(bp);
FSDBG_BOT(514, vp, 0xd1e000f, 0, error);
return (error);
}
}
buffer_ready:
vp->v_lastr = lbn;
if (bp->nb_validend > 0) {
diff = (on >= bp->nb_validend) ? 0 : (bp->nb_validend - on);
if (diff < n)
n = diff;
}
if (n > 0)
NFS_BUF_MAP(bp);
break;
case VLNK:
nfsstats.biocache_readlinks++;
bp = nfs_buf_get(vp, (daddr_t)0, NFS_MAXPATHLEN, p, operation);
if (!bp) {
FSDBG_BOT(514, vp, 0xd1e0010, 0, EINTR);
return (EINTR);
}
if (!ISSET(bp->nb_flags, NB_CACHE)) {
SET(bp->nb_flags, NB_READ);
error = nfs_doio(bp, cred, p);
if (error) {
SET(bp->nb_flags, NB_ERROR);
nfs_buf_release(bp);
FSDBG_BOT(514, vp, 0xd1e0011, 0, error);
return (error);
}
}
n = min(uio->uio_resid, bp->nb_validend);
on = 0;
break;
case VDIR:
nfsstats.biocache_readdirs++;
if (np->n_direofoffset && uio->uio_offset >= np->n_direofoffset) {
FSDBG_BOT(514, vp, 0xde0f0001, 0, 0);
return (0);
}
lbn = uio->uio_offset / NFS_DIRBLKSIZ;
on = uio->uio_offset & (NFS_DIRBLKSIZ - 1);
bp = nfs_buf_get(vp, lbn, NFS_DIRBLKSIZ, p, operation);
if (!bp) {
FSDBG_BOT(514, vp, 0xd1e0012, 0, EINTR);
return (EINTR);
}
if (!ISSET(bp->nb_flags, NB_CACHE)) {
SET(bp->nb_flags, NB_READ);
error = nfs_doio(bp, cred, p);
if (error) {
nfs_buf_release(bp);
}
while (error == NFSERR_BAD_COOKIE) {
nfs_invaldir(vp);
error = nfs_vinvalbuf(vp, 0, cred, p, 1);
for (i = 0; i <= lbn && !error; i++) {
if (np->n_direofoffset
&& (i * NFS_DIRBLKSIZ) >= np->n_direofoffset) {
FSDBG_BOT(514, vp, 0xde0f0002, 0, 0);
return (0);
}
bp = nfs_buf_get(vp, i, NFS_DIRBLKSIZ, p, operation);
if (!bp) {
FSDBG_BOT(514, vp, 0xd1e0013, 0, EINTR);
return (EINTR);
}
if (!ISSET(bp->nb_flags, NB_CACHE)) {
SET(bp->nb_flags, NB_READ);
error = nfs_doio(bp, cred, p);
if (error == 0 && (bp->nb_flags & NB_INVAL))
break;
}
if (error || i < lbn)
nfs_buf_release(bp);
}
}
if (error) {
FSDBG_BOT(514, vp, 0xd1e0014, 0, error);
return (error);
}
}
if (nfs_numasync > 0 && nmp->nm_readahead > 0 &&
(np->n_direofoffset == 0 ||
(lbn + 1) * NFS_DIRBLKSIZ < np->n_direofoffset) &&
!(np->n_flag & NQNFSNONCACHE) &&
!nfs_buf_incore(vp, lbn + 1)) {
rabp = nfs_buf_get(vp, lbn + 1, NFS_DIRBLKSIZ, p,
operation);
if (rabp) {
if (!ISSET(rabp->nb_flags, (NB_CACHE))) {
SET(rabp->nb_flags, (NB_READ | NB_ASYNC));
if (nfs_asyncio(rabp, cred)) {
SET(rabp->nb_flags, (NB_INVAL|NB_ERROR));
rabp->nb_error = EIO;
nfs_buf_release(rabp);
}
} else {
nfs_buf_release(rabp);
}
}
}
n = lmin(uio->uio_resid, bp->nb_validend - on);
if (np->n_direofoffset &&
n > np->n_direofoffset - uio->uio_offset)
n = np->n_direofoffset - uio->uio_offset;
if (n > 0) {
dp = bp->nb_data + on;
while (dp < (bp->nb_data + on + n)) {
direntp = (struct dirent *)dp;
dp += direntp->d_reclen;
}
if (dp > (bp->nb_data + on + n))
n = (dp - direntp->d_reclen) - (bp->nb_data + on);
}
break;
default:
printf("nfs_bioread: type %x unexpected\n",vp->v_type);
FSDBG_BOT(514, vp, 0xd1e0015, 0, EINVAL);
return (EINVAL);
};
if (n > 0) {
error = uiomove(bp->nb_data + on, (int)n, uio);
}
switch (vp->v_type) {
case VREG:
break;
case VLNK:
n = 0;
break;
case VDIR:
if (np->n_flag & NQNFSNONCACHE)
SET(bp->nb_flags, NB_INVAL);
break;
}
nfs_buf_release(bp);
} while (error == 0 && uio->uio_resid > 0 && n > 0);
FSDBG_BOT(514, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
}
int
nfs_write(ap)
struct vop_write_args *ap;
{
struct uio *uio = ap->a_uio;
struct proc *p = uio->uio_procp;
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct ucred *cred = ap->a_cred;
int ioflag = ap->a_ioflag;
struct nfsbuf *bp;
struct vattr vattr;
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
daddr_t lbn;
int biosize, bufsize, writeop;
int n, on, error = 0, iomode, must_commit;
off_t boff, start, end;
struct iovec iov;
struct uio auio;
FSDBG_TOP(515, vp, uio->uio_offset, uio->uio_resid, ioflag);
#if DIAGNOSTIC
if (uio->uio_rw != UIO_WRITE)
panic("nfs_write mode");
if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != current_proc())
panic("nfs_write proc");
#endif
if (vp->v_type != VREG)
return (EIO);
if (np->n_flag & NWRITEERR) {
np->n_flag &= ~NWRITEERR;
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, np->n_error);
return (np->n_error);
}
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
!(nmp->nm_state & NFSSTA_GOTFSINFO))
(void)nfs_fsinfo(nmp, vp, cred, p);
if (ioflag & (IO_APPEND | IO_SYNC)) {
if (np->n_flag & NMODIFIED) {
np->n_xid = 0;
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, 0x10bad01, error);
return (error);
}
}
if (ioflag & IO_APPEND) {
np->n_xid = 0;
error = VOP_GETATTR(vp, &vattr, cred, p);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, 0x10bad02, error);
return (error);
}
uio->uio_offset = np->n_size;
}
}
if (uio->uio_offset < 0) {
FSDBG_BOT(515, vp, uio->uio_offset, 0xbad0ff, EINVAL);
return (EINVAL);
}
if (uio->uio_resid == 0) {
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, 0);
return (0);
}
if (p && uio->uio_offset + uio->uio_resid >
p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
psignal(p, SIGXFSZ);
FSDBG_BOT(515, vp, uio->uio_offset, 0x2b1f, EFBIG);
return (EFBIG);
}
biosize = vp->v_mount->mnt_stat.f_iosize;
do {
if ((nmp->nm_flag & NFSMNT_NQNFS) &&
NQNFS_CKINVALID(vp, np, ND_WRITE)) {
do {
error = nqnfs_getlease(vp, ND_WRITE, cred, p);
} while (error == NQNFS_EXPIRED);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, 0x11110001, error);
return (error);
}
if (np->n_lrev != np->n_brev ||
(np->n_flag & NQNFSNONCACHE)) {
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, 0x11110002, error);
return (error);
}
np->n_brev = np->n_lrev;
}
}
if (ISSET(vp->v_flag, VNOCACHE_DATA) &&
(np->n_dirtyblkhd.lh_first || np->n_cleanblkhd.lh_first)) {
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(515, vp, 0, 0, error);
return (error);
}
}
if (((np->n_flag & NQNFSNONCACHE) ||
ISSET(vp->v_flag, VNOCACHE_DATA)) &&
uio->uio_iovcnt == 1) {
iomode = NFSV3WRITE_FILESYNC;
error = nfs_writerpc(vp, uio, cred, &iomode, &must_commit);
if (must_commit)
nfs_clearcommit(vp->v_mount);
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
}
nfsstats.biocache_writes++;
lbn = uio->uio_offset / biosize;
on = uio->uio_offset % biosize;
n = min((unsigned)(biosize - on), uio->uio_resid);
again:
bufsize = biosize;
bp = nfs_buf_get(vp, lbn, bufsize, p, BLK_WRITE);
if (!bp) {
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, EINTR);
return (EINTR);
}
NFS_BUF_MAP(bp);
if (ISSET(vp->v_flag, VNOCACHE_DATA))
SET(bp->nb_flags, (NB_NOCACHE|NB_INVAL));
if (bp->nb_wcred == NOCRED)
bp->nb_wcred = crdup(cred);
if (bp->nb_dirtyend > 0) {
if (on > bp->nb_dirtyend || (on + n) < bp->nb_dirtyoff || bp->nb_dirty) {
FSDBG(515, vp, uio->uio_offset, bp, 0xd15c001);
CLR(bp->nb_flags, (NB_DONE | NB_ERROR | NB_INVAL));
SET(bp->nb_flags, (NB_ASYNC | NB_STABLE));
error = nfs_buf_write(bp);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
}
goto again;
}
} else if (bp->nb_dirty) {
int firstpg, lastpg;
u_int32_t pagemask;
firstpg = on/PAGE_SIZE;
lastpg = (on+n-1)/PAGE_SIZE;
pagemask = ((1 << (lastpg+1)) - 1) & ~((1 << firstpg) - 1);
if (bp->nb_dirty & ~pagemask) {
FSDBG(515, vp, uio->uio_offset, bp, 0xd15c002);
CLR(bp->nb_flags, (NB_DONE | NB_ERROR | NB_INVAL));
SET(bp->nb_flags, (NB_ASYNC | NB_STABLE));
error = nfs_buf_write(bp);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
}
goto again;
}
if (NBPGDIRTY(bp,firstpg) || NBPGDIRTY(bp,lastpg)) {
FSDBG(515, vp, uio->uio_offset, bp, 0xd15c003);
bp->nb_dirtyoff = min(on, firstpg * PAGE_SIZE);
if (NBPGDIRTY(bp,lastpg)) {
bp->nb_dirtyend = (lastpg+1) * PAGE_SIZE;
if (NBOFF(bp) + bp->nb_dirtyend > np->n_size)
bp->nb_dirtyend = np->n_size - NBOFF(bp);
} else
bp->nb_dirtyend = on+n;
}
}
if (uio->uio_offset + n > np->n_size) {
struct nfsbuf *eofbp = NULL;
daddr_t eofbn = np->n_size / biosize;
int eofoff = np->n_size % biosize;
int neweofoff = (uio->uio_offset + n) % biosize;
FSDBG(515, 0xb1ffa000, uio->uio_offset + n, eofoff, neweofoff);
if (eofoff && eofbn < lbn && nfs_buf_incore(vp, eofbn))
eofbp = nfs_buf_get(vp, eofbn, biosize, p, BLK_WRITE);
if ((lbn == eofbn) && ISSET(bp->nb_flags, NB_CACHE)) {
int endpg = ((neweofoff ? neweofoff : biosize) - 1)/PAGE_SIZE;
u_int32_t pagemask;
pagemask = (1 << (endpg+1)) - 1;
FSDBG(515, 0xb1ffa001, bp->nb_valid, pagemask, 0);
if ((bp->nb_valid & pagemask) != pagemask) {
if (on > bp->nb_validend) {
int i;
for (i=bp->nb_validend/PAGE_SIZE; i <= (on - 1)/PAGE_SIZE; i++)
NBPGVALID_SET(bp, i);
NFS_BUF_MAP(bp);
FSDBG(516, bp, bp->nb_validend, on - bp->nb_validend, 0xf01e);
bzero((char *)bp->nb_data + bp->nb_validend,
on - bp->nb_validend);
}
if (neweofoff) {
NFS_BUF_MAP(bp);
FSDBG(516, bp, neweofoff, PAGE_SIZE - (neweofoff & PAGE_MASK), 0xe0f);
bzero((char *)bp->nb_data + neweofoff,
PAGE_SIZE - (neweofoff & PAGE_MASK));
}
}
}
np->n_flag |= NMODIFIED;
np->n_size = uio->uio_offset + n;
ubc_setsize(vp, (off_t)np->n_size);
if (eofbp) {
char *d;
int i;
if (ISSET(vp->v_flag, VNOCACHE_DATA))
SET(eofbp->nb_flags, (NB_NOCACHE|NB_INVAL));
NFS_BUF_MAP(eofbp);
FSDBG(516, eofbp, eofoff, biosize - eofoff, 0xe0fff01e);
d = eofbp->nb_data;
i = eofoff/PAGE_SIZE;
while (eofoff < biosize) {
int poff = eofoff & PAGE_MASK;
if (!poff || NBPGVALID(eofbp,i)) {
bzero(d + eofoff, PAGE_SIZE - poff);
NBPGVALID_SET(eofbp, i);
}
if (bp->nb_validend == eofoff)
bp->nb_validend += PAGE_SIZE - poff;
eofoff += PAGE_SIZE - poff;
i++;
}
nfs_buf_release(eofbp);
}
}
if (NBOFF(bp) + bp->nb_dirtyend > np->n_size)
bp->nb_dirtyend = np->n_size - NBOFF(bp);
if (!ISSET(bp->nb_flags, NB_CACHE) && n < biosize) {
int firstpg, lastpg, dirtypg;
int firstpgoff, lastpgoff;
start = end = -1;
firstpg = on/PAGE_SIZE;
firstpgoff = on & PAGE_MASK;
lastpg = (on+n-1)/PAGE_SIZE;
lastpgoff = (on+n) & PAGE_MASK;
if (firstpgoff && !NBPGVALID(bp,firstpg)) {
start = firstpg * PAGE_SIZE;
end = start + firstpgoff;
}
if (lastpgoff && !NBPGVALID(bp,lastpg)) {
if (start < 0)
start = (lastpg * PAGE_SIZE) + lastpgoff;
end = (lastpg + 1) * PAGE_SIZE;
}
if (end > start) {
for (dirtypg=start/PAGE_SIZE; dirtypg <= (end-1)/PAGE_SIZE; dirtypg++)
if (NBPGDIRTY(bp,dirtypg))
break;
if (!(start & PAGE_MASK)) {
for (; start > 0; start-=PAGE_SIZE)
if (NBPGVALID(bp,((start-1)/PAGE_SIZE)))
break;
}
NFS_BUF_MAP(bp);
boff = NBOFF(bp);
auio.uio_iov = &iov;
auio.uio_iovcnt = 1;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_rw = UIO_READ;
auio.uio_procp = p;
if (dirtypg <= (end-1)/PAGE_SIZE) {
auio.uio_offset = boff + start;
auio.uio_resid = iov.iov_len = on - start;
iov.iov_base = bp->nb_data + start;
error = nfs_readrpc(vp, &auio, cred);
if (error) {
bp->nb_error = error;
SET(bp->nb_flags, NB_ERROR);
printf("nfs_write: readrpc %d", error);
}
if (auio.uio_resid > 0) {
FSDBG(516, bp, iov.iov_base - bp->nb_data, auio.uio_resid, 0xd00dee01);
bzero(iov.iov_base, auio.uio_resid);
}
if ((bp->nb_validoff < 0) || (bp->nb_validoff > start))
bp->nb_validoff = start;
if ((bp->nb_validend < 0) || (bp->nb_validend < on))
bp->nb_validend = on;
if (np->n_size > boff + bp->nb_validend)
bp->nb_validend = min(np->n_size - (boff + start), biosize);
for (; start < on/PAGE_SIZE; start+=PAGE_SIZE)
NBPGVALID_SET(bp, start/PAGE_SIZE);
start = on+n;
}
if (!(end & PAGE_MASK)) {
for (; end < bufsize; end+=PAGE_SIZE)
if (NBPGVALID(bp,end/PAGE_SIZE))
break;
}
auio.uio_offset = boff + start;
auio.uio_resid = iov.iov_len = end - start;
iov.iov_base = bp->nb_data + start;
error = nfs_readrpc(vp, &auio, cred);
if (error) {
bp->nb_error = error;
SET(bp->nb_flags, NB_ERROR);
printf("nfs_write: readrpc %d", error);
}
if (auio.uio_resid > 0) {
FSDBG(516, bp, iov.iov_base - bp->nb_data, auio.uio_resid, 0xd00dee02);
bzero(iov.iov_base, auio.uio_resid);
}
if ((bp->nb_validoff < 0) || (bp->nb_validoff > start))
bp->nb_validoff = start;
if ((bp->nb_validend < 0) || (bp->nb_validend < end))
bp->nb_validend = end;
if (np->n_size > boff + bp->nb_validend)
bp->nb_validend = min(np->n_size - (boff + start), biosize);
for (; start < trunc_page_32(on); start+=PAGE_SIZE)
NBPGVALID_SET(bp, start/PAGE_SIZE);
for (; (end - 1) > round_page_32(on+n-1); end-=PAGE_SIZE)
NBPGVALID_SET(bp, (end-1)/PAGE_SIZE);
}
}
if (ISSET(bp->nb_flags, NB_ERROR)) {
error = bp->nb_error;
nfs_buf_release(bp);
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
}
np->n_flag |= NMODIFIED;
if ((nmp->nm_flag & NFSMNT_NQNFS) &&
NQNFS_CKINVALID(vp, np, ND_WRITE)) {
do {
error = nqnfs_getlease(vp, ND_WRITE, cred, p);
} while (error == NQNFS_EXPIRED);
if (error) {
nfs_buf_release(bp);
FSDBG_BOT(515, vp, uio->uio_offset, 0x11220001, error);
return (error);
}
if (np->n_lrev != np->n_brev ||
(np->n_flag & NQNFSNONCACHE)) {
nfs_buf_release(bp);
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset, 0x11220002, error);
return (error);
}
np->n_brev = np->n_lrev;
goto again;
}
}
NFS_BUF_MAP(bp);
error = uiomove((char *)bp->nb_data + on, n, uio);
if (error) {
SET(bp->nb_flags, NB_ERROR);
nfs_buf_release(bp);
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, error);
return (error);
}
start = on & ~PAGE_MASK;
for (; start < on+n; start += PAGE_SIZE) {
NBPGVALID_SET(bp, start/PAGE_SIZE);
}
if (bp->nb_dirtyend > 0) {
bp->nb_dirtyoff = min(on, bp->nb_dirtyoff);
bp->nb_dirtyend = max((on + n), bp->nb_dirtyend);
} else {
bp->nb_dirtyoff = on;
bp->nb_dirtyend = on + n;
}
if (bp->nb_validend <= 0 || bp->nb_validend < bp->nb_dirtyoff ||
bp->nb_validoff > bp->nb_dirtyend) {
bp->nb_validoff = bp->nb_dirtyoff;
bp->nb_validend = bp->nb_dirtyend;
} else {
bp->nb_validoff = min(bp->nb_validoff, bp->nb_dirtyoff);
bp->nb_validend = max(bp->nb_validend, bp->nb_dirtyend);
}
if (!ISSET(bp->nb_flags, NB_CACHE))
nfs_buf_normalize_valid_range(np, bp);
if (ISSET(bp->nb_flags, NB_NEEDCOMMIT)) {
np->n_needcommitcnt--;
CHECK_NEEDCOMMITCNT(np);
}
CLR(bp->nb_flags, NB_NEEDCOMMIT);
if ((np->n_flag & NQNFSNONCACHE) ||
(ioflag & IO_SYNC) || (vp->v_flag & VNOCACHE_DATA)) {
bp->nb_proc = p;
error = nfs_buf_write(bp);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset,
uio->uio_resid, error);
return (error);
}
if (np->n_flag & NQNFSNONCACHE) {
error = nfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
if (error) {
FSDBG_BOT(515, vp, uio->uio_offset,
uio->uio_resid, error);
return (error);
}
}
} else if ((n + on) == biosize && (nmp->nm_flag & NFSMNT_NQNFS) == 0) {
bp->nb_proc = (struct proc *)0;
SET(bp->nb_flags, NB_ASYNC);
nfs_buf_write(bp);
} else
nfs_buf_write_delayed(bp);
if (np->n_needcommitcnt > (nbuf/16))
nfs_flushcommits(vp, p);
} while (uio->uio_resid > 0 && n > 0);
FSDBG_BOT(515, vp, uio->uio_offset, uio->uio_resid, 0);
return (0);
}
static int
nfs_vinvalbuf_internal(vp, flags, cred, p, slpflag, slptimeo)
register struct vnode *vp;
int flags;
struct ucred *cred;
struct proc *p;
int slpflag, slptimeo;
{
struct nfsbuf *bp;
struct nfsbuf *nbp, *blist;
int s, error = 0;
struct nfsnode *np = VTONFS(vp);
if (flags & V_SAVE) {
if (error = VOP_FSYNC(vp, cred, MNT_WAIT, p))
return (error);
if (np->n_dirtyblkhd.lh_first)
panic("nfs_vinvalbuf: dirty bufs (vp 0x%x, bp 0x%x)",
vp, np->n_dirtyblkhd.lh_first);
}
for (;;) {
blist = np->n_cleanblkhd.lh_first;
if (!blist)
blist = np->n_dirtyblkhd.lh_first;
if (!blist)
break;
for (bp = blist; bp; bp = nbp) {
nbp = bp->nb_vnbufs.le_next;
s = splbio();
if (ISSET(bp->nb_flags, NB_BUSY)) {
SET(bp->nb_flags, NB_WANTED);
FSDBG_TOP(556, vp, bp, NBOFF(bp), bp->nb_flags);
error = tsleep((caddr_t)bp,
slpflag | (PRIBIO + 1), "nfs_vinvalbuf",
slptimeo);
FSDBG_BOT(556, vp, bp, NBOFF(bp), bp->nb_flags);
splx(s);
if (error) {
FSDBG(554, vp, bp, -1, error);
return (error);
}
break;
}
FSDBG(554, vp, bp, NBOFF(bp), bp->nb_flags);
nfs_buf_remfree(bp);
SET(bp->nb_flags, NB_BUSY);
splx(s);
if ((flags & V_SAVE) && UBCINFOEXISTS(vp) && (NBOFF(bp) < np->n_size)) {
int mustwrite = 0;
int end = (NBOFF(bp) + bp->nb_bufsize >= np->n_size) ?
bp->nb_bufsize : (np->n_size - NBOFF(bp));
if (!ISSET(bp->nb_flags, NB_PAGELIST)) {
error = nfs_buf_upl_setup(bp);
if (error == EINVAL) {
} else if (error)
printf("nfs_vinvalbuf: upl setup failed %d\n",
error);
bp->nb_valid = bp->nb_dirty = 0;
}
nfs_buf_upl_check(bp);
if (bp->nb_dirtyend && bp->nb_dirtyoff < end) {
if (bp->nb_dirtyend > end)
bp->nb_dirtyend = end;
mustwrite++;
}
bp->nb_dirty &= (1 << (round_page_32(end)/PAGE_SIZE)) - 1;
if (bp->nb_dirty)
mustwrite++;
if (mustwrite) {
FSDBG(554, vp, bp, 0xd00dee, bp->nb_flags);
if (!ISSET(bp->nb_flags, NB_PAGELIST))
panic("nfs_vinvalbuf: dirty buffer without upl");
CLR(bp->nb_flags, (NB_DONE | NB_ERROR | NB_INVAL | NB_ASYNC));
SET(bp->nb_flags, NB_STABLE | NB_NOCACHE);
if (bp->nb_wcred == NOCRED)
bp->nb_wcred = crdup(cred);
error = nfs_buf_write(bp);
if (error) {
FSDBG(554, bp, 0xd00dee, 0xbad, error);
np->n_error = error;
np->n_flag |= NWRITEERR;
error = 0;
}
break;
}
}
SET(bp->nb_flags, NB_INVAL);
nfs_buf_release(bp);
}
}
if (np->n_dirtyblkhd.lh_first || np->n_cleanblkhd.lh_first)
panic("nfs_vinvalbuf: flush failed");
return (0);
}
int
nfs_vinvalbuf(vp, flags, cred, p, intrflg)
struct vnode *vp;
int flags;
struct ucred *cred;
struct proc *p;
int intrflg;
{
register struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
int error = 0, slpflag, slptimeo;
int didhold = 0;
FSDBG_TOP(554, vp, flags, intrflg, 0);
if (nmp && ((nmp->nm_flag & NFSMNT_INT) == 0))
intrflg = 0;
if (intrflg) {
slpflag = PCATCH;
slptimeo = 2 * hz;
} else {
slpflag = 0;
slptimeo = 0;
}
while (np->n_flag & NFLUSHINPROG) {
np->n_flag |= NFLUSHWANT;
FSDBG_TOP(555, vp, flags, intrflg, np->n_flag);
error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "nfsvinval", slptimeo);
FSDBG_BOT(555, vp, flags, intrflg, np->n_flag);
if (error && (error = nfs_sigintr(VFSTONFS(vp->v_mount), NULL, p))) {
FSDBG_BOT(554, vp, flags, intrflg, error);
return (error);
}
}
np->n_flag |= NFLUSHINPROG;
error = nfs_vinvalbuf_internal(vp, flags, cred, p, slpflag, 0);
while (error) {
FSDBG(554, vp, 0, 0, error);
error = nfs_sigintr(VFSTONFS(vp->v_mount), NULL, p);
if (error) {
np->n_flag &= ~NFLUSHINPROG;
if (np->n_flag & NFLUSHWANT) {
np->n_flag &= ~NFLUSHWANT;
wakeup((caddr_t)&np->n_flag);
}
FSDBG_BOT(554, vp, flags, intrflg, error);
return (error);
}
error = nfs_vinvalbuf_internal(vp, flags, cred, p, 0, slptimeo);
}
np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
if (np->n_flag & NFLUSHWANT) {
np->n_flag &= ~NFLUSHWANT;
wakeup((caddr_t)&np->n_flag);
}
didhold = ubc_hold(vp);
if (didhold) {
int rv = ubc_clean(vp, 1);
if (!rv)
panic("nfs_vinvalbuf(): ubc_clean failed!");
ubc_rele(vp);
}
FSDBG_BOT(554, vp, flags, intrflg, 0);
return (0);
}
int
nfs_asyncio(bp, cred)
struct nfsbuf *bp;
struct ucred *cred;
{
struct nfsmount *nmp;
int i;
int gotiod;
int slpflag = 0;
int slptimeo = 0;
int error, error2;
if (nfs_numasync == 0)
return (EIO);
FSDBG_TOP(552, bp, bp ? NBOFF(bp) : 0, bp ? bp->nb_flags : 0, 0);
nmp = ((bp != NULL) ? VFSTONFS(bp->nb_vp->v_mount) : NULL);
again:
if (nmp && nmp->nm_flag & NFSMNT_INT)
slpflag = PCATCH;
gotiod = FALSE;
if (!bp)
nfs_ioddelwri = 1;
for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
if (nfs_iodwant[i]) {
NFS_DPF(ASYNCIO,
("nfs_asyncio: waking iod %d for mount %p\n",
i, nmp));
nfs_iodwant[i] = (struct proc *)0;
nfs_iodmount[i] = nmp;
if (nmp)
nmp->nm_bufqiods++;
wakeup((caddr_t)&nfs_iodwant[i]);
gotiod = TRUE;
break;
}
if (!bp)
return (0);
if (!gotiod) {
if (nmp->nm_bufqiods > 0) {
NFS_DPF(ASYNCIO,
("nfs_asyncio: %d iods are already processing mount %p\n",
nmp->nm_bufqiods, nmp));
gotiod = TRUE;
}
}
FSDBG(552, bp, gotiod, i, nmp->nm_bufqiods);
if (gotiod) {
while (nmp->nm_bufqlen >= 2*nfs_numasync) {
if (ISSET(bp->nb_flags, NB_IOD)) {
goto out;
}
FSDBG(552, bp, nmp->nm_bufqlen, 2*nfs_numasync, -1);
NFS_DPF(ASYNCIO,
("nfs_asyncio: waiting for mount %p queue to drain\n", nmp));
nmp->nm_bufqwant = TRUE;
error = tsleep(&nmp->nm_bufq, slpflag | PRIBIO,
"nfsaio", slptimeo);
if (error) {
error2 = nfs_sigintr(nmp, NULL, bp->nb_proc);
if (error2) {
FSDBG_BOT(552, bp, NBOFF(bp), bp->nb_flags, error2);
return (error2);
}
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
}
if (nmp->nm_bufqiods == 0) {
NFS_DPF(ASYNCIO,
("nfs_asyncio: no iods after mount %p queue was drained, looping\n", nmp));
goto again;
}
}
if (ISSET(bp->nb_flags, NB_READ)) {
if (bp->nb_rcred == NOCRED && cred != NOCRED) {
bp->nb_rcred = crdup(cred);
}
} else {
SET(bp->nb_flags, NB_WRITEINPROG);
if (bp->nb_wcred == NOCRED && cred != NOCRED) {
bp->nb_wcred = crdup(cred);
}
}
TAILQ_INSERT_TAIL(&nmp->nm_bufq, bp, nb_free);
nmp->nm_bufqlen++;
FSDBG_BOT(552, bp, NBOFF(bp), bp->nb_flags, 0);
return (0);
}
out:
NFS_DPF(ASYNCIO, ("nfs_asyncio: no iods available, i/o is synchronous\n"));
FSDBG_BOT(552, bp, NBOFF(bp), bp->nb_flags, EIO);
return (EIO);
}
int
nfs_doio(bp, cr, p)
struct nfsbuf *bp;
struct ucred *cr;
struct proc *p;
{
register struct uio *uiop;
register struct vnode *vp;
struct nfsnode *np;
struct nfsmount *nmp;
int error = 0, diff, len, iomode, must_commit = 0;
struct uio uio;
struct iovec io;
vp = bp->nb_vp;
np = VTONFS(vp);
nmp = VFSTONFS(vp->v_mount);
uiop = &uio;
uiop->uio_iov = &io;
uiop->uio_iovcnt = 1;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_procp = p;
if (ISSET(bp->nb_flags, NB_DONE)) {
if (!ISSET(bp->nb_flags, NB_ASYNC))
panic("nfs_doio: done and not async");
CLR(bp->nb_flags, NB_DONE);
}
FSDBG_TOP(256, np->n_size, NBOFF(bp), bp->nb_bufsize, bp->nb_flags);
FSDBG(257, bp->nb_validoff, bp->nb_validend, bp->nb_dirtyoff,
bp->nb_dirtyend);
if (ISSET(bp->nb_flags, NB_READ)) {
if (vp->v_type == VREG)
NFS_BUF_MAP(bp);
io.iov_len = uiop->uio_resid = bp->nb_bufsize;
io.iov_base = bp->nb_data;
uiop->uio_rw = UIO_READ;
switch (vp->v_type) {
case VREG:
uiop->uio_offset = NBOFF(bp);
nfsstats.read_bios++;
error = nfs_readrpc(vp, uiop, cr);
FSDBG(262, np->n_size, NBOFF(bp), uiop->uio_resid, error);
if (!error) {
bp->nb_validoff = 0;
if (uiop->uio_resid) {
diff = bp->nb_bufsize - uiop->uio_resid;
len = np->n_size - (NBOFF(bp) + diff);
if (len > 0) {
len = min(len, uiop->uio_resid);
bzero((char *)bp->nb_data + diff, len);
bp->nb_validend = diff + len;
FSDBG(258, diff, len, 0, 1);
} else
bp->nb_validend = diff;
} else
bp->nb_validend = bp->nb_bufsize;
bp->nb_valid = (1 << (round_page_32(bp->nb_validend)/PAGE_SIZE)) - 1;
if (bp->nb_validend & PAGE_MASK) {
bzero((caddr_t)(bp->nb_data + bp->nb_validend),
bp->nb_bufsize - bp->nb_validend);
FSDBG(258, bp->nb_validend,
bp->nb_bufsize - bp->nb_validend, 0, 2);
}
}
if (p && (vp->v_flag & VTEXT) &&
(((nmp->nm_flag & NFSMNT_NQNFS) &&
NQNFS_CKINVALID(vp, np, ND_READ) &&
np->n_lrev != np->n_brev) ||
(!(nmp->nm_flag & NFSMNT_NQNFS) &&
np->n_mtime != np->n_vattr.va_mtime.tv_sec))) {
uprintf("Process killed due to text file modification\n");
psignal(p, SIGKILL);
p->p_flag |= P_NOSWAP;
}
break;
case VLNK:
uiop->uio_offset = (off_t)0;
nfsstats.readlink_bios++;
error = nfs_readlinkrpc(vp, uiop, cr);
if (!error) {
bp->nb_validoff = 0;
bp->nb_validend = uiop->uio_offset;
}
break;
case VDIR:
nfsstats.readdir_bios++;
uiop->uio_offset = NBOFF(bp);
if (!(nmp->nm_flag & NFSMNT_NFSV3))
nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
if (nmp->nm_flag & NFSMNT_RDIRPLUS) {
error = nfs_readdirplusrpc(vp, uiop, cr);
if (error == NFSERR_NOTSUPP)
nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
}
if ((nmp->nm_flag & NFSMNT_RDIRPLUS) == 0)
error = nfs_readdirrpc(vp, uiop, cr);
if (!error) {
bp->nb_validoff = 0;
bp->nb_validend = uiop->uio_offset - NBOFF(bp);
bp->nb_valid = (1 << (round_page_32(bp->nb_validend)/PAGE_SIZE)) - 1;
}
break;
default:
printf("nfs_doio: type %x unexpected\n", vp->v_type);
break;
};
if (error) {
SET(bp->nb_flags, NB_ERROR);
bp->nb_error = error;
}
} else {
int doff, dend = 0;
if (!ISSET(bp->nb_flags, NB_META) && UBCISVALID(vp)) {
if (!ISSET(bp->nb_flags, NB_PAGELIST)) {
error = nfs_buf_upl_setup(bp);
if (error) {
printf("nfs_doio: upl create failed %d\n", error);
SET(bp->nb_flags, NB_ERROR);
bp->nb_error = EIO;
return (EIO);
}
nfs_buf_upl_check(bp);
}
}
if (ISSET(bp->nb_flags, NB_WASDIRTY)) {
FSDBG(256, bp, NBOFF(bp), bp->nb_dirty, 0xd00dee);
}
if ((bp->nb_flags & (NB_NEEDCOMMIT | NB_WRITEINPROG)) == NB_NEEDCOMMIT) {
doff = NBOFF(bp) + bp->nb_dirtyoff;
SET(bp->nb_flags, NB_WRITEINPROG);
error = nfs_commit(vp, doff, bp->nb_dirtyend - bp->nb_dirtyoff,
bp->nb_wcred, bp->nb_proc);
CLR(bp->nb_flags, NB_WRITEINPROG);
if (!error) {
bp->nb_dirtyoff = bp->nb_dirtyend = 0;
CLR(bp->nb_flags, NB_NEEDCOMMIT);
np->n_needcommitcnt--;
CHECK_NEEDCOMMITCNT(np);
} else if (error == NFSERR_STALEWRITEVERF)
nfs_clearcommit(vp->v_mount);
}
if (!error && bp->nb_dirtyend > 0) {
u_int32_t pagemask;
int firstpg, lastpg;
if (NBOFF(bp) + bp->nb_dirtyend > np->n_size)
bp->nb_dirtyend = np->n_size - NBOFF(bp);
NFS_BUF_MAP(bp);
doff = bp->nb_dirtyoff;
dend = bp->nb_dirtyend;
if (NBPGDIRTY(bp,doff/PAGE_SIZE))
doff -= doff & PAGE_MASK;
if (!(doff & PAGE_MASK))
while (doff > 0 && NBPGDIRTY(bp,(doff-1)/PAGE_SIZE))
doff -= PAGE_SIZE;
if ((dend & PAGE_MASK) && NBPGDIRTY(bp,dend/PAGE_SIZE))
dend = round_page_32(dend);
if (!(dend & PAGE_MASK))
while (dend < bp->nb_bufsize && NBPGDIRTY(bp,dend/PAGE_SIZE))
dend += PAGE_SIZE;
if (NBOFF(bp) + dend > np->n_size)
dend = np->n_size - NBOFF(bp);
firstpg = round_page_32(doff) / PAGE_SIZE;
lastpg = (trunc_page_32(dend) - 1)/ PAGE_SIZE;
pagemask = ((1 << (lastpg+1)) - 1) & ~((1 << firstpg) - 1);
if (bp->nb_dirty & ~pagemask)
iomode = NFSV3WRITE_FILESYNC;
else if ((bp->nb_flags & (NB_ASYNC | NB_NEEDCOMMIT | NB_NOCACHE | NB_STABLE)) == NB_ASYNC)
iomode = NFSV3WRITE_UNSTABLE;
else
iomode = NFSV3WRITE_FILESYNC;
io.iov_len = uiop->uio_resid = dend - doff;
uiop->uio_offset = NBOFF(bp) + doff;
io.iov_base = (char *)bp->nb_data + doff;
uiop->uio_rw = UIO_WRITE;
nfsstats.write_bios++;
SET(bp->nb_flags, NB_WRITEINPROG);
error = nfs_writerpc(vp, uiop, cr, &iomode, &must_commit);
if (must_commit)
nfs_clearcommit(vp->v_mount);
if (!error)
bp->nb_dirty &= ~pagemask;
if (!error && iomode == NFSV3WRITE_UNSTABLE) {
if (!ISSET(bp->nb_flags, NB_NEEDCOMMIT))
np->n_needcommitcnt++;
SET(bp->nb_flags, NB_NEEDCOMMIT);
bp->nb_dirtyoff = doff;
bp->nb_dirtyend = dend;
} else {
if (ISSET(bp->nb_flags, NB_NEEDCOMMIT)) {
np->n_needcommitcnt--;
CHECK_NEEDCOMMITCNT(np);
}
CLR(bp->nb_flags, NB_NEEDCOMMIT);
}
CLR(bp->nb_flags, NB_WRITEINPROG);
if (error == EINTR || (!error && bp->nb_flags & NB_NEEDCOMMIT)) {
CLR(bp->nb_flags, NB_INVAL | NB_NOCACHE);
if (!ISSET(bp->nb_flags, NB_DELWRI)) {
SET(bp->nb_flags, NB_DELWRI);
nfs_nbdwrite++;
NFSBUFCNTCHK();
}
FSDBG(261, bp->nb_validoff, bp->nb_validend,
bp->nb_bufsize, 0);
if (ISSET(bp->nb_flags, NB_ASYNC)) {
int s = splbio();
if (bp->nb_vnbufs.le_next != NFSNOLIST)
LIST_REMOVE(bp, nb_vnbufs);
LIST_INSERT_HEAD(&np->n_dirtyblkhd, bp, nb_vnbufs);
splx(s);
} else {
SET(bp->nb_flags, NB_EINTR);
}
} else {
if (error) {
SET(bp->nb_flags, NB_ERROR);
bp->nb_error = np->n_error = error;
np->n_flag |= NWRITEERR;
}
bp->nb_dirtyoff = bp->nb_dirtyend = 0;
}
}
if (!error && bp->nb_dirty) {
int pg, cnt, npages, off, len;
nfsstats.write_bios++;
NFS_BUF_MAP(bp);
iomode = NFSV3WRITE_FILESYNC;
uiop->uio_rw = UIO_WRITE;
SET(bp->nb_flags, NB_WRITEINPROG);
npages = bp->nb_bufsize/PAGE_SIZE;
for (pg=0; pg < npages; pg++) {
if (!NBPGDIRTY(bp,pg))
continue;
cnt = 1;
while (((pg+cnt) < npages) && NBPGDIRTY(bp,pg+cnt))
cnt++;
off = pg * PAGE_SIZE;
len = cnt * PAGE_SIZE;
if (NBOFF(bp) + off + len > np->n_size)
len -= (NBOFF(bp) + off + len) - np->n_size;
if (len > 0) {
io.iov_len = uiop->uio_resid = len;
uiop->uio_offset = NBOFF(bp) + off;
io.iov_base = (char *)bp->nb_data + off;
error = nfs_writerpc(vp, uiop, cr, &iomode, &must_commit);
if (must_commit)
nfs_clearcommit(vp->v_mount);
if (error)
break;
}
while (cnt--) {
bp->nb_dirty &= ~(1 << pg);
if (cnt) pg++;
}
}
if (!error) {
if (ISSET(bp->nb_flags, NB_NEEDCOMMIT)) {
np->n_needcommitcnt--;
CHECK_NEEDCOMMITCNT(np);
}
CLR(bp->nb_flags, NB_NEEDCOMMIT);
}
CLR(bp->nb_flags, NB_WRITEINPROG);
FSDBG_BOT(256, bp->nb_validoff, bp->nb_validend, bp->nb_bufsize,
np->n_size);
}
if (error) {
SET(bp->nb_flags, NB_ERROR);
bp->nb_error = error;
}
}
FSDBG_BOT(256, bp->nb_validoff, bp->nb_validend, bp->nb_bufsize, error);
nfs_buf_iodone(bp);
return (error);
}