Ejemplo n.º 1
0
/*
 * Perform a synchronous indirect write of the given block number
 * on the given device, using the given fbuf.  Upon return the fbp
 * is invalid.
 */
int
fbiwrite(struct fbuf *fbp, vnode_t *devvp, daddr_t bn, int bsize)
{
	struct buf *bp;
	int error, fberror;

	/*
	 * Allocate a temp bp using pageio_setup, but then use it
	 * for physio to the area mapped by fbuf which is currently
	 * all locked down in place.
	 *
	 * XXX - need to have a generalized bp header facility
	 * which we build up pageio_setup on top of.  Other places
	 * (like here and in device drivers for the raw I/O case)
	 * could then use these new facilities in a more straight
	 * forward fashion instead of playing all these games.
	 */
	bp = pageio_setup((struct page *)NULL, fbp->fb_count, devvp, B_WRITE);
	bp->b_flags &= ~B_PAGEIO;		/* XXX */
	bp->b_un.b_addr = fbp->fb_addr;

	bp->b_blkno = bn * btod(bsize);
	bp->b_dev = cmpdev(devvp->v_rdev);	/* store in old dev format */
	bp->b_edev = devvp->v_rdev;
	bp->b_proc = NULL;			/* i.e. the kernel */

	(void) bdev_strategy(bp);
	error = biowait(bp);
	pageio_done(bp);

	/*CSTYLED*/
	FBCOMMON(fbp, S_OTHER, 0, fberror = )

	return (error ? error : fberror);
}
Ejemplo n.º 2
0
static void
mkprpsinfo32(struct ps_prochandle *P, prpsinfo32_t *psp)
{
	bzero(psp, sizeof (*psp));
	psp->pr_state = P->psinfo.pr_lwp.pr_state;
	psp->pr_sname = P->psinfo.pr_lwp.pr_sname;
	psp->pr_zomb = (psp->pr_state == SZOMB);
	psp->pr_nice = P->psinfo.pr_lwp.pr_nice;
	psp->pr_flag = P->psinfo.pr_lwp.pr_flag;
	psp->pr_uid = P->psinfo.pr_uid;
	psp->pr_gid = P->psinfo.pr_gid;
	psp->pr_pid = P->psinfo.pr_pid;
	psp->pr_ppid = P->psinfo.pr_ppid;
	psp->pr_pgrp = P->psinfo.pr_pgid;
	psp->pr_sid = P->psinfo.pr_sid;
	psp->pr_addr = (caddr32_t)P->psinfo.pr_addr;
	psp->pr_size = P->psinfo.pr_size;
	psp->pr_rssize = P->psinfo.pr_rssize;
	psp->pr_wchan = (caddr32_t)P->psinfo.pr_lwp.pr_wchan;
	timestruc_n_to_32(&P->psinfo.pr_start, &psp->pr_start);
	timestruc_n_to_32(&P->psinfo.pr_time, &psp->pr_time);
	psp->pr_pri = P->psinfo.pr_lwp.pr_pri;
	psp->pr_oldpri = P->psinfo.pr_lwp.pr_oldpri;
	psp->pr_cpu = P->psinfo.pr_lwp.pr_cpu;
	psp->pr_ottydev = cmpdev(P->psinfo.pr_ttydev);
	psp->pr_lttydev = prcmpldev(P->psinfo.pr_ttydev);
	(void) strncpy(psp->pr_clname, P->psinfo.pr_lwp.pr_clname,
	    sizeof (psp->pr_clname));
	(void) strncpy(psp->pr_fname, P->psinfo.pr_fname,
	    sizeof (psp->pr_fname));
	bcopy(&P->psinfo.pr_psargs, &psp->pr_psargs,
	    sizeof (psp->pr_psargs));
	psp->pr_syscall = P->psinfo.pr_lwp.pr_syscall;
	timestruc_n_to_32(&P->psinfo.pr_ctime, &psp->pr_ctime);
	psp->pr_bysize = psp->pr_size * PAGESIZE;
	psp->pr_byrssize = psp->pr_rssize * PAGESIZE;
	psp->pr_argc = P->psinfo.pr_argc;
	psp->pr_argv = (caddr32_t)P->psinfo.pr_argv;
	psp->pr_envp = (caddr32_t)P->psinfo.pr_envp;
	psp->pr_wstat = P->psinfo.pr_wstat;
	psp->pr_pctcpu = P->psinfo.pr_pctcpu;
	psp->pr_pctmem = P->psinfo.pr_pctmem;
	psp->pr_euid = P->psinfo.pr_euid;
	psp->pr_egid = P->psinfo.pr_egid;
	psp->pr_aslwpid = 0;
	psp->pr_dmodel = P->psinfo.pr_dmodel;
}
Ejemplo n.º 3
0
/*
 * Assign a buffer for the given block.  If the appropriate
 * block is already associated, return it; otherwise search
 * for the oldest non-busy buffer and reassign it.
 */
struct buf *
getblk_common(void * arg, dev_t dev, daddr_t blkno, long bsize, int errflg)
{
	ufsvfs_t *ufsvfsp = (struct ufsvfs *)arg;
	struct buf *bp;
	struct buf *dp;
	struct buf *nbp = NULL;
	struct buf *errbp;
	uint_t		index;
	kmutex_t	*hmp;
	struct	hbuf	*hp;

	if (getmajor(dev) >= devcnt)
		cmn_err(CE_PANIC, "blkdev");

	biostats.bio_lookup.value.ui32++;

	index = bio_bhash(dev, blkno);
	hp    = &hbuf[index];
	dp    = (struct buf *)hp;
	hmp   = &hp->b_lock;

	mutex_enter(hmp);
loop:
	for (bp = dp->b_forw; bp != dp; bp = bp->b_forw) {
		if (bp->b_blkno != blkno || bp->b_edev != dev ||
		    (bp->b_flags & B_STALE))
			continue;
		/*
		 * Avoid holding the hash lock in the event that
		 * the buffer is locked by someone. Since the hash chain
		 * may change when we drop the hash lock
		 * we have to start at the beginning of the chain if the
		 * buffer identity/contents aren't valid.
		 */
		if (!sema_tryp(&bp->b_sem)) {
			biostats.bio_bufbusy.value.ui32++;
			mutex_exit(hmp);
			/*
			 * OK, we are dealing with a busy buffer.
			 * In the case that we are panicking and we
			 * got called from bread(), we have some chance
			 * for error recovery. So better bail out from
			 * here since sema_p() won't block. If we got
			 * called directly from ufs routines, there is
			 * no way to report an error yet.
			 */
			if (panicstr && errflg)
				goto errout;
			/*
			 * For the following line of code to work
			 * correctly never kmem_free the buffer "header".
			 */
			sema_p(&bp->b_sem);
			if (bp->b_blkno != blkno || bp->b_edev != dev ||
			    (bp->b_flags & B_STALE)) {
				sema_v(&bp->b_sem);
				mutex_enter(hmp);
				goto loop;	/* start over */
			}
			mutex_enter(hmp);
		}
		/* Found */
		biostats.bio_hit.value.ui32++;
		bp->b_flags &= ~B_AGE;

		/*
		 * Yank it off the free/delayed write lists
		 */
		hp->b_length--;
		notavail(bp);
		mutex_exit(hmp);

		ASSERT((bp->b_flags & B_NOCACHE) == NULL);

		if (nbp == NULL) {
			/*
			 * Make the common path short.
			 */
			ASSERT(SEMA_HELD(&bp->b_sem));
			return (bp);
		}

		biostats.bio_bufdup.value.ui32++;

		/*
		 * The buffer must have entered during the lock upgrade
		 * so free the new buffer we allocated and return the
		 * found buffer.
		 */
		kmem_free(nbp->b_un.b_addr, nbp->b_bufsize);
		nbp->b_un.b_addr = NULL;

		/*
		 * Account for the memory
		 */
		mutex_enter(&bfree_lock);
		bfreelist.b_bufsize += nbp->b_bufsize;
		mutex_exit(&bfree_lock);

		/*
		 * Destroy buf identity, and place on avail list
		 */
		nbp->b_dev = (o_dev_t)NODEV;
		nbp->b_edev = NODEV;
		nbp->b_flags = 0;
		nbp->b_file = NULL;
		nbp->b_offset = -1;

		sema_v(&nbp->b_sem);
		bio_bhdr_free(nbp);

		ASSERT(SEMA_HELD(&bp->b_sem));
		return (bp);
	}

	/*
	 * bio_getfreeblk may block so check the hash chain again.
	 */
	if (nbp == NULL) {
		mutex_exit(hmp);
		nbp = bio_getfreeblk(bsize);
		mutex_enter(hmp);
		goto loop;
	}

	/*
	 * New buffer. Assign nbp and stick it on the hash.
	 */
	nbp->b_flags = B_BUSY;
	nbp->b_edev = dev;
	nbp->b_dev = (o_dev_t)cmpdev(dev);
	nbp->b_blkno = blkno;
	nbp->b_iodone = NULL;
	nbp->b_bcount = bsize;
	/*
	 * If we are given a ufsvfsp and the vfs_root field is NULL
	 * then this must be I/O for a superblock.  A superblock's
	 * buffer is set up in mountfs() and there is no root vnode
	 * at that point.
	 */
	if (ufsvfsp && ufsvfsp->vfs_root) {
		nbp->b_vp = ufsvfsp->vfs_root;
	} else {
		nbp->b_vp = NULL;
	}

	ASSERT((nbp->b_flags & B_NOCACHE) == NULL);

	binshash(nbp, dp);
	mutex_exit(hmp);

	ASSERT(SEMA_HELD(&nbp->b_sem));

	return (nbp);


	/*
	 * Come here in case of an internal error. At this point we couldn't
	 * get a buffer, but he have to return one. Hence we allocate some
	 * kind of error reply buffer on the fly. This buffer is marked as
	 * B_NOCACHE | B_AGE | B_ERROR | B_DONE to assure the following:
	 *	- B_ERROR will indicate error to the caller.
	 *	- B_DONE will prevent us from reading the buffer from
	 *	  the device.
	 *	- B_NOCACHE will cause that this buffer gets free'd in
	 *	  brelse().
	 */

errout:
	errbp = geteblk();
	sema_p(&errbp->b_sem);
	errbp->b_flags &= ~B_BUSY;
	errbp->b_flags |= (B_ERROR | B_DONE);
	return (errbp);
}
Ejemplo n.º 4
0
/*ARGSUSED*/
int
ufs_rdwr_data(
	vnode_t		*vnodep,
	u_offset_t	offset,
	size_t		len,
	fdbuffer_t	*fdbp,
	int		flags,
	cred_t		*credp)
{
	struct inode	*ip = VTOI(vnodep);
	struct fs	*fs;
	struct ufsvfs	*ufsvfsp = ip->i_ufsvfs;
	struct buf	*bp;
	krw_t		rwtype = RW_READER;
	u_offset_t	offset1 = offset;	/* Initial offset */
	size_t		iolen;
	int		curlen = 0;
	int		pplen;
	daddr_t		bn;
	int		contig = 0;
	int		error = 0;
	int		nbytes;			/* Number bytes this IO */
	int		offsetn;		/* Start point this IO */
	int		iswrite = flags & B_WRITE;
	int		io_started = 0;		/* No IO started */
	struct ulockfs	*ulp;
	uint_t		protp = PROT_ALL;

	error = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, segkmap, !iswrite,
	    &protp);
	if (error) {
		if (flags & B_ASYNC) {
			fdb_ioerrdone(fdbp, error);
		}
		return (error);
	}
	fs = ufsvfsp->vfs_fs;
	iolen = len;

	DEBUGF((CE_CONT, "?ufs_rdwr: %s vp: %p pages:%p  off %llx len %lx"
	    " isize: %llx fdb: %p\n",
	    flags & B_READ ? "READ" : "WRITE", (void *)vnodep,
	    (void *)vnodep->v_pages, offset1, iolen, ip->i_size, (void *)fdbp));

	rw_enter(&ip->i_ufsvfs->vfs_dqrwlock, RW_READER);
	rw_enter(&ip->i_contents, rwtype);

	ASSERT(offset1 < ip->i_size);

	if ((offset1 + iolen) > ip->i_size) {
		iolen = ip->i_size - offset1;
	}
	while (!error && curlen < iolen) {

		contig = 0;

		if ((error = bmap_read(ip, offset1, &bn, &contig)) != 0) {
			break;
		}
		ASSERT(!(bn == UFS_HOLE && iswrite));
		if (bn == UFS_HOLE) {
			/*
			 * If the above assertion is true,
			 * then the following if statement can never be true.
			 */
			if (iswrite && (rwtype == RW_READER)) {
				rwtype = RW_WRITER;
				if (!rw_tryupgrade(&ip->i_contents)) {
					rw_exit(&ip->i_contents);
					rw_enter(&ip->i_contents, rwtype);
					continue;
				}
			}
			offsetn = blkoff(fs, offset1);
			pplen = P2ROUNDUP(len, PAGESIZE);
			nbytes = MIN((pplen - curlen),
			    (fs->fs_bsize - offsetn));
			ASSERT(nbytes > 0);

			/*
			 * We may be reading or writing.
			 */
			DEBUGF((CE_CONT, "?ufs_rdwr_data: hole %llx - %lx\n",
			    offset1, (iolen - curlen)));

			if (iswrite) {
				printf("**WARNING: ignoring hole in write\n");
				error = ENOSPC;
			} else {
				fdb_add_hole(fdbp, offset1 - offset, nbytes);
			}
			offset1 += nbytes;
			curlen += nbytes;
			continue;

		}
		ASSERT(contig > 0);
		pplen = P2ROUNDUP(len, PAGESIZE);

		contig = MIN(contig, len - curlen);
		contig = P2ROUNDUP(contig, DEV_BSIZE);

		bp = fdb_iosetup(fdbp, offset1 - offset, contig, vnodep, flags);

		bp->b_edev = ip->i_dev;
		bp->b_dev = cmpdev(ip->i_dev);
		bp->b_blkno = bn;
		bp->b_file = ip->i_vnode;
		bp->b_offset = (offset_t)offset1;

		if (ufsvfsp->vfs_snapshot) {
			fssnap_strategy(&ufsvfsp->vfs_snapshot, bp);
		} else {
			(void) bdev_strategy(bp);
		}
		io_started = 1;

		offset1 += contig;
		curlen += contig;
		if (iswrite)
			lwp_stat_update(LWP_STAT_OUBLK, 1);
		else
			lwp_stat_update(LWP_STAT_INBLK, 1);

		if ((flags & B_ASYNC) == 0) {
			error = biowait(bp);
			fdb_iodone(bp);
		}

		DEBUGF((CE_CONT, "?loop ufs_rdwr_data.. off %llx len %lx\n",
		    offset1, (iolen - curlen)));
	}

	DEBUGF((CE_CONT, "?ufs_rdwr_data: off %llx len %lx pages: %p ------\n",
	    offset1, (iolen - curlen), (void *)vnodep->v_pages));

	rw_exit(&ip->i_contents);
	rw_exit(&ip->i_ufsvfs->vfs_dqrwlock);

	if (flags & B_ASYNC) {
		/*
		 * Show that no more asynchronous IO will be added
		 */
		fdb_ioerrdone(fdbp, error);
	}
	if (ulp) {
		ufs_lockfs_end(ulp);
	}
	if (io_started && flags & B_ASYNC) {
		return (0);
	} else {
		return (error);
	}
}
Ejemplo n.º 5
0
/*
 * ufs_alloc_data - supports allocating space and reads or writes
 * that involve changes to file length or space allocation.
 *
 * This function is more expensive, because of the UFS log transaction,
 * so ufs_rdwr_data() should be used when space or file length changes
 * will not occur.
 *
 * Inputs:
 * fdb - A null pointer instructs this function to only allocate
 *	space for the specified offset and length.
 *	An actual fdbuffer instructs this function to perform
 *	the read or write operation.
 * flags - defaults (zero value) to synchronous write
 *	B_READ - indicates read operation
 *	B_ASYNC - indicates perform operation asynchronously
 */
int
ufs_alloc_data(
	vnode_t		*vnodep,
	u_offset_t	offset,
	size_t		*len,
	fdbuffer_t	*fdbp,
	int		flags,
	cred_t		*credp)
{
	struct inode	*ip = VTOI(vnodep);
	size_t		done_len, io_len;
	int		contig;
	u_offset_t	uoff, io_off;
	int		error = 0;		/* No error occured */
	int		offsetn;		/* Start point this IO */
	int		nbytes;			/* Number bytes in this IO */
	daddr_t		bn;
	struct fs	*fs;
	struct ufsvfs	*ufsvfsp = ip->i_ufsvfs;
	int		i_size_changed = 0;
	u_offset_t	old_i_size;
	struct ulockfs	*ulp;
	int		trans_size;
	int		issync;			/* UFS Log transaction */
						/* synchronous when non-zero */

	int		io_started = 0;		/* No IO started */
	uint_t		protp = PROT_ALL;

	ASSERT((flags & B_WRITE) == 0);

	/*
	 * Obey the lockfs protocol
	 */
	error = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, segkmap, 0, &protp);
	if (error) {
		if ((fdbp != NULL) && (flags & B_ASYNC)) {
			fdb_ioerrdone(fdbp, error);
		}
		return (error);
	}
	if (ulp) {
		/*
		 * Try to begin a UFS log transaction
		 */
		trans_size = TOP_GETPAGE_SIZE(ip);
		TRANS_TRY_BEGIN_CSYNC(ufsvfsp, issync, TOP_GETPAGE,
		    trans_size, error);
		if (error == EWOULDBLOCK) {
			ufs_lockfs_end(ulp);
			if ((fdbp != NULL) && (flags & B_ASYNC)) {
				fdb_ioerrdone(fdbp, EDEADLK);
			}
			return (EDEADLK);
		}
	}

	uoff = offset;
	io_off = offset;
	io_len = *len;
	done_len = 0;

	DEBUGF((CE_CONT, "?ufs_alloc: off %llx len %lx size %llx fdb: %p\n",
	    uoff, (io_len - done_len), ip->i_size, (void *)fdbp));

	rw_enter(&ip->i_ufsvfs->vfs_dqrwlock, RW_READER);
	rw_enter(&ip->i_contents, RW_WRITER);

	ASSERT((ip->i_mode & IFMT) == IFREG);

	fs = ip->i_fs;

	while (error == 0 && done_len < io_len) {
		uoff = (u_offset_t)(io_off + done_len);
		offsetn = (int)blkoff(fs, uoff);
		nbytes = (int)MIN(fs->fs_bsize - offsetn, io_len - done_len);

		DEBUGF((CE_CONT, "?ufs_alloc_data: offset: %llx len %x\n",
		    uoff, nbytes));

		if (uoff + nbytes > ip->i_size) {
			/*
			 * We are extending the length of the file.
			 * bmap is used so that we are sure that
			 * if we need to allocate new blocks, that it
			 * is done here before we up the file size.
			 */
			DEBUGF((CE_CONT, "?ufs_alloc_data: grow %llx -> %llx\n",
			    ip->i_size, uoff + nbytes));

			error = bmap_write(ip, uoff, (offsetn + nbytes),
			    BI_ALLOC_ONLY, NULL, credp);
			if (ip->i_flag & (ICHG|IUPD))
				ip->i_seq++;
			if (error) {
				DEBUGF((CE_CONT, "?ufs_alloc_data: grow "
				    "failed err: %d\n", error));
				break;
			}
			if (fdbp != NULL) {
				if (uoff >= ip->i_size) {
					/*
					 * Desired offset is past end of bytes
					 * in file, so we have a hole.
					 */
					fdb_add_hole(fdbp, uoff - offset,
					    nbytes);
				} else {
					int contig;
					buf_t *bp;

					error = bmap_read(ip, uoff, &bn,
					    &contig);
					if (error) {
						break;
					}

					contig = ip->i_size - uoff;
					contig = P2ROUNDUP(contig, DEV_BSIZE);

					bp = fdb_iosetup(fdbp, uoff - offset,
					    contig, vnodep, flags);

					bp->b_edev = ip->i_dev;
					bp->b_dev = cmpdev(ip->i_dev);
					bp->b_blkno = bn;
					bp->b_file = ip->i_vnode;
					bp->b_offset = (offset_t)uoff;

					if (ufsvfsp->vfs_snapshot) {
						fssnap_strategy(
						    &ufsvfsp->vfs_snapshot, bp);
					} else {
						(void) bdev_strategy(bp);
					}
					io_started = 1;

					lwp_stat_update(LWP_STAT_OUBLK, 1);

					if ((flags & B_ASYNC) == 0) {
						error = biowait(bp);
						fdb_iodone(bp);
						if (error) {
							break;
						}
					}
					if (contig > (ip->i_size - uoff)) {
						contig -= ip->i_size - uoff;

						fdb_add_hole(fdbp,
						    ip->i_size - offset,
						    contig);
					}
				}
			}

			i_size_changed = 1;
			old_i_size = ip->i_size;
			UFS_SET_ISIZE(uoff + nbytes, ip);
			TRANS_INODE(ip->i_ufsvfs, ip);
			/*
			 * file has grown larger than 2GB. Set flag
			 * in superblock to indicate this, if it
			 * is not already set.
			 */
			if ((ip->i_size > MAXOFF32_T) &&
			    !(fs->fs_flags & FSLARGEFILES)) {
				ASSERT(ufsvfsp->vfs_lfflags & UFS_LARGEFILES);
				mutex_enter(&ufsvfsp->vfs_lock);
				fs->fs_flags |= FSLARGEFILES;
				ufs_sbwrite(ufsvfsp);
				mutex_exit(&ufsvfsp->vfs_lock);
			}
		} else {
			/*
			 * The file length is not being extended.
			 */
			error = bmap_read(ip, uoff, &bn, &contig);
			if (error) {
				DEBUGF((CE_CONT, "?ufs_alloc_data: "
				    "bmap_read err: %d\n", error));
				break;
			}

			if (bn != UFS_HOLE) {
				/*
				 * Did not map a hole in the file
				 */
				int	contig = P2ROUNDUP(nbytes, DEV_BSIZE);
				buf_t	*bp;

				if (fdbp != NULL) {
					bp = fdb_iosetup(fdbp, uoff - offset,
					    contig, vnodep, flags);

					bp->b_edev = ip->i_dev;
					bp->b_dev = cmpdev(ip->i_dev);
					bp->b_blkno = bn;
					bp->b_file = ip->i_vnode;
					bp->b_offset = (offset_t)uoff;

					if (ufsvfsp->vfs_snapshot) {
						fssnap_strategy(
						    &ufsvfsp->vfs_snapshot, bp);
					} else {
						(void) bdev_strategy(bp);
					}
					io_started = 1;

					lwp_stat_update(LWP_STAT_OUBLK, 1);

					if ((flags & B_ASYNC) == 0) {
						error = biowait(bp);
						fdb_iodone(bp);
						if (error) {
							break;
						}
					}
				}
			} else {
				/*
				 * We read a hole in the file.
				 * We have to allocate blocks for the hole.
				 */
				error = bmap_write(ip, uoff, (offsetn + nbytes),
				    BI_ALLOC_ONLY, NULL, credp);
				if (ip->i_flag & (ICHG|IUPD))
					ip->i_seq++;
				if (error) {
					DEBUGF((CE_CONT, "?ufs_alloc_data: fill"
					    " hole failed error: %d\n", error));
					break;
				}
				if (fdbp != NULL) {
					fdb_add_hole(fdbp, uoff - offset,
					    nbytes);
				}
			}
		}
		done_len += nbytes;
	}

	if (error) {
		if (i_size_changed) {
			/*
			 * Allocation of the blocks for the file failed.
			 * So truncate the file size back to its original size.
			 */
			(void) ufs_itrunc(ip, old_i_size, 0, credp);
		}
	}

	DEBUGF((CE_CONT, "?ufs_alloc: uoff %llx len %lx\n",
	    uoff, (io_len - done_len)));

	if ((offset + *len) < (NDADDR * fs->fs_bsize)) {
		*len = (size_t)(roundup(offset + *len, fs->fs_fsize) - offset);
	} else {
		*len = (size_t)(roundup(offset + *len, fs->fs_bsize) - offset);
	}

	/*
	 * Flush cached pages.
	 *
	 * XXX - There should be no pages involved, since the I/O was performed
	 * through the device strategy routine and the page cache was bypassed.
	 * However, testing has demonstrated that this VOP_PUTPAGE is
	 * necessary. Without this, data might not always be read back as it
	 * was written.
	 *
	 */
	(void) VOP_PUTPAGE(vnodep, 0, 0, B_INVAL, credp);

	rw_exit(&ip->i_contents);
	rw_exit(&ip->i_ufsvfs->vfs_dqrwlock);

	if ((fdbp != NULL) && (flags & B_ASYNC)) {
		/*
		 * Show that no more asynchronous IO will be added
		 */
		fdb_ioerrdone(fdbp, error);
	}
	if (ulp) {
		/*
		 * End the UFS Log transaction
		 */
		TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_GETPAGE,
		    trans_size);
		ufs_lockfs_end(ulp);
	}
	if (io_started && (flags & B_ASYNC)) {
		return (0);
	} else {
		return (error);
	}
}
Ejemplo n.º 6
0
/* ARGSUSED  */
int
dadk_ioctl(opaque_t objp, dev_t dev, int cmd, intptr_t arg, int flag,
	cred_t *cred_p, int *rval_p)
{
	struct dadk *dadkp = (struct dadk *)objp;

	switch (cmd) {
	case DKIOCGETDEF:
		{
		struct buf	*bp;
		int		err, head;
		unsigned char	*secbuf;
		STRUCT_DECL(defect_header, adh);

		STRUCT_INIT(adh, flag & FMODELS);

		/*
		 * copyin header ....
		 * yields head number and buffer address
		 */
		if (ddi_copyin((caddr_t)arg, STRUCT_BUF(adh), STRUCT_SIZE(adh),
		    flag))
			return (EFAULT);
		head = STRUCT_FGET(adh, head);
		if (head < 0 || head >= dadkp->dad_phyg.g_head)
			return (ENXIO);
		secbuf = kmem_zalloc(NBPSCTR, KM_SLEEP);
		if (!secbuf)
			return (ENOMEM);
		bp = getrbuf(KM_SLEEP);
		if (!bp) {
			kmem_free(secbuf, NBPSCTR);
			return (ENOMEM);
		}

		bp->b_edev = dev;
		bp->b_dev  = cmpdev(dev);
		bp->b_flags = B_BUSY;
		bp->b_resid = 0;
		bp->b_bcount = NBPSCTR;
		bp->b_un.b_addr = (caddr_t)secbuf;
		bp->b_blkno = head; /* I had to put it somwhere! */
		bp->b_forw = (struct buf *)dadkp;
		bp->b_back = (struct buf *)DCMD_GETDEF;

		mutex_enter(&dadkp->dad_cmd_mutex);
		dadkp->dad_cmd_count++;
		mutex_exit(&dadkp->dad_cmd_mutex);
		FLC_ENQUE(dadkp->dad_flcobjp, bp);
		err = biowait(bp);
		if (!err) {
			if (ddi_copyout((caddr_t)secbuf,
			    STRUCT_FGETP(adh, buffer), NBPSCTR, flag))
				err = ENXIO;
		}
		kmem_free(secbuf, NBPSCTR);
		freerbuf(bp);
		return (err);
		}
	case DIOCTL_RWCMD:
		{
		struct dadkio_rwcmd *rwcmdp;
		int status, rw;

		/*
		 * copied in by cmdk and, if necessary, converted to the
		 * correct datamodel
		 */
		rwcmdp = (struct dadkio_rwcmd *)(intptr_t)arg;

		/*
		 * handle the complex cases here; we pass these
		 * through to the driver, which will queue them and
		 * handle the requests asynchronously.  The simpler
		 * cases ,which can return immediately, fail here, and
		 * the request reverts to the dadk_ioctl routine, while
		 *  will reroute them directly to the ata driver.
		 */
		switch (rwcmdp->cmd) {
			case DADKIO_RWCMD_READ :
				/*FALLTHROUGH*/
			case DADKIO_RWCMD_WRITE:
				rw = ((rwcmdp->cmd == DADKIO_RWCMD_WRITE) ?
				    B_WRITE : B_READ);
				status = dadk_dk_buf_setup(dadkp,
				    (opaque_t)rwcmdp, dev, ((flag &FKIOCTL) ?
				    UIO_SYSSPACE : UIO_USERSPACE), rw);
				return (status);
			default:
				return (EINVAL);
			}
		}
	case DKIOC_UPDATEFW:

		/*
		 * Require PRIV_ALL privilege to invoke DKIOC_UPDATEFW
		 * to protect the firmware update from malicious use
		 */
		if (PRIV_POLICY(cred_p, PRIV_ALL, B_FALSE, EPERM, NULL) != 0)
			return (EPERM);
		else
			return (dadk_ctl_ioctl(dadkp, cmd, arg, flag));

	case DKIOCFLUSHWRITECACHE:
		{
			struct buf *bp;
			int err = 0;
			struct dk_callback *dkc = (struct dk_callback *)arg;
			struct cmpkt *pktp;
			int is_sync = 1;

			mutex_enter(&dadkp->dad_mutex);
			if (dadkp->dad_noflush || !  dadkp->dad_wce) {
				err = dadkp->dad_noflush ? ENOTSUP : 0;
				mutex_exit(&dadkp->dad_mutex);
				/*
				 * If a callback was requested: a
				 * callback will always be done if the
				 * caller saw the DKIOCFLUSHWRITECACHE
				 * ioctl return 0, and never done if the
				 * caller saw the ioctl return an error.
				 */
				if ((flag & FKIOCTL) && dkc != NULL &&
				    dkc->dkc_callback != NULL) {
					(*dkc->dkc_callback)(dkc->dkc_cookie,
					    err);
					/*
					 * Did callback and reported error.
					 * Since we did a callback, ioctl
					 * should return 0.
					 */
					err = 0;
				}
				return (err);
			}
			mutex_exit(&dadkp->dad_mutex);

			bp = getrbuf(KM_SLEEP);

			bp->b_edev = dev;
			bp->b_dev  = cmpdev(dev);
			bp->b_flags = B_BUSY;
			bp->b_resid = 0;
			bp->b_bcount = 0;
			SET_BP_SEC(bp, 0);

			if ((flag & FKIOCTL) && dkc != NULL &&
			    dkc->dkc_callback != NULL) {
				struct dk_callback *dkc2 =
				    (struct dk_callback *)kmem_zalloc(
				    sizeof (struct dk_callback), KM_SLEEP);

				bcopy(dkc, dkc2, sizeof (*dkc2));
				bp->b_private = dkc2;
				bp->b_iodone = dadk_flushdone;
				is_sync = 0;
			}

			/*
			 * Setup command pkt
			 * dadk_pktprep() can't fail since DDI_DMA_SLEEP set
			 */
			pktp = dadk_pktprep(dadkp, NULL, bp,
			    dadk_iodone, DDI_DMA_SLEEP, NULL);

			pktp->cp_time = DADK_FLUSH_CACHE_TIME;

			*((char *)(pktp->cp_cdbp)) = DCMD_FLUSH_CACHE;
			pktp->cp_byteleft = 0;
			pktp->cp_private = NULL;
			pktp->cp_secleft = 0;
			pktp->cp_srtsec = -1;
			pktp->cp_bytexfer = 0;

			CTL_IOSETUP(dadkp->dad_ctlobjp, pktp);

			mutex_enter(&dadkp->dad_cmd_mutex);
			dadkp->dad_cmd_count++;
			mutex_exit(&dadkp->dad_cmd_mutex);
			FLC_ENQUE(dadkp->dad_flcobjp, bp);

			if (is_sync) {
				err = biowait(bp);
				freerbuf(bp);
			}
			return (err);
		}
	default:
		if (!dadkp->dad_rmb)
			return (dadk_ctl_ioctl(dadkp, cmd, arg, flag));
	}

	switch (cmd) {
	case CDROMSTOP:
		return (dadk_rmb_ioctl(dadkp, DCMD_STOP_MOTOR, 0,
		    0, DADK_SILENT));
	case CDROMSTART:
		return (dadk_rmb_ioctl(dadkp, DCMD_START_MOTOR, 0,
		    0, DADK_SILENT));
	case DKIOCLOCK:
		return (dadk_rmb_ioctl(dadkp, DCMD_LOCK, 0, 0, DADK_SILENT));
	case DKIOCUNLOCK:
		return (dadk_rmb_ioctl(dadkp, DCMD_UNLOCK, 0, 0, DADK_SILENT));
	case DKIOCEJECT:
	case CDROMEJECT:
		{
			int ret;

			if (ret = dadk_rmb_ioctl(dadkp, DCMD_UNLOCK, 0, 0,
			    DADK_SILENT)) {
				return (ret);
			}
			if (ret = dadk_rmb_ioctl(dadkp, DCMD_EJECT, 0, 0,
			    DADK_SILENT)) {
				return (ret);
			}
			mutex_enter(&dadkp->dad_mutex);
			dadkp->dad_iostate = DKIO_EJECTED;
			cv_broadcast(&dadkp->dad_state_cv);
			mutex_exit(&dadkp->dad_mutex);

			return (0);

		}
	default:
		return (ENOTTY);
	/*
	 * cdrom audio commands
	 */
	case CDROMPAUSE:
		cmd = DCMD_PAUSE;
		break;
	case CDROMRESUME:
		cmd = DCMD_RESUME;
		break;
	case CDROMPLAYMSF:
		cmd = DCMD_PLAYMSF;
		break;
	case CDROMPLAYTRKIND:
		cmd = DCMD_PLAYTRKIND;
		break;
	case CDROMREADTOCHDR:
		cmd = DCMD_READTOCHDR;
		break;
	case CDROMREADTOCENTRY:
		cmd = DCMD_READTOCENT;
		break;
	case CDROMVOLCTRL:
		cmd = DCMD_VOLCTRL;
		break;
	case CDROMSUBCHNL:
		cmd = DCMD_SUBCHNL;
		break;
	case CDROMREADMODE2:
		cmd = DCMD_READMODE2;
		break;
	case CDROMREADMODE1:
		cmd = DCMD_READMODE1;
		break;
	case CDROMREADOFFSET:
		cmd = DCMD_READOFFSET;
		break;
	}
	return (dadk_rmb_ioctl(dadkp, cmd, arg, flag, 0));
}