-/* lfs_vnops.c 4.36 82/09/04 */
+/*
+ * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#)lfs_vnops.c 7.33 (Berkeley) %G%
+ */
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/kernel.h"
-#include "../h/file.h"
-#include "../h/stat.h"
-#include "../h/inode.h"
-#include "../h/fs.h"
-#include "../h/buf.h"
-#include "../h/proc.h"
-#include "../h/inline.h"
-/* no reason to inline expand these guys here */
-#undef ilock
-#undef iunlock
-#include "../h/quota.h"
-#include "../h/descrip.h"
-#include "../h/uio.h"
-#include "../h/socket.h"
+#include "param.h"
+#include "systm.h"
+#include "user.h"
+#include "kernel.h"
+#include "file.h"
+#include "stat.h"
+#include "buf.h"
+#include "proc.h"
+#include "uio.h"
+#include "socket.h"
+#include "socketvar.h"
+#include "conf.h"
+#include "mount.h"
+#include "vnode.h"
+#include "../ufs/inode.h"
+#include "../ufs/fs.h"
+#include "../ufs/quota.h"
-chdir()
+/*
+ * Global vfs data structures for ufs
+ */
+
+int ufs_lookup(),
+ ufs_create(),
+ ufs_mknod(),
+ ufs_open(),
+ ufs_close(),
+ ufs_access(),
+ ufs_getattr(),
+ ufs_setattr(),
+ ufs_read(),
+ ufs_write(),
+ ufs_ioctl(),
+ ufs_select(),
+ ufs_mmap(),
+ ufs_fsync(),
+ ufs_seek(),
+ ufs_remove(),
+ ufs_link(),
+ ufs_rename(),
+ ufs_mkdir(),
+ ufs_rmdir(),
+ ufs_symlink(),
+ ufs_readdir(),
+ ufs_readlink(),
+ ufs_abortop(),
+ ufs_inactive(),
+ ufs_reclaim(),
+ ufs_lock(),
+ ufs_unlock(),
+ ufs_bmap(),
+ ufs_strategy(),
+ ufs_print(),
+ ufs_islocked();
+
+struct vnodeops ufs_vnodeops = {
+ ufs_lookup, /* lookup */
+ ufs_create, /* create */
+ ufs_mknod, /* mknod */
+ ufs_open, /* open */
+ ufs_close, /* close */
+ ufs_access, /* access */
+ ufs_getattr, /* getattr */
+ ufs_setattr, /* setattr */
+ ufs_read, /* read */
+ ufs_write, /* write */
+ ufs_ioctl, /* ioctl */
+ ufs_select, /* select */
+ ufs_mmap, /* mmap */
+ ufs_fsync, /* fsync */
+ ufs_seek, /* seek */
+ ufs_remove, /* remove */
+ ufs_link, /* link */
+ ufs_rename, /* rename */
+ ufs_mkdir, /* mkdir */
+ ufs_rmdir, /* rmdir */
+ ufs_symlink, /* symlink */
+ ufs_readdir, /* readdir */
+ ufs_readlink, /* readlink */
+ ufs_abortop, /* abortop */
+ ufs_inactive, /* inactive */
+ ufs_reclaim, /* reclaim */
+ ufs_lock, /* lock */
+ ufs_unlock, /* unlock */
+ ufs_bmap, /* bmap */
+ ufs_strategy, /* strategy */
+ ufs_print, /* print */
+ ufs_islocked, /* islocked */
+};
+
+int spec_lookup(),
+ spec_open(),
+ ufsspec_read(),
+ ufsspec_write(),
+ spec_strategy(),
+ spec_bmap(),
+ spec_ioctl(),
+ spec_select(),
+ ufsspec_close(),
+ spec_badop(),
+ spec_nullop();
+
+struct vnodeops spec_inodeops = {
+ spec_lookup, /* lookup */
+ spec_badop, /* create */
+ spec_badop, /* mknod */
+ spec_open, /* open */
+ ufsspec_close, /* close */
+ ufs_access, /* access */
+ ufs_getattr, /* getattr */
+ ufs_setattr, /* setattr */
+ ufsspec_read, /* read */
+ ufsspec_write, /* write */
+ spec_ioctl, /* ioctl */
+ spec_select, /* select */
+ spec_badop, /* mmap */
+ spec_nullop, /* fsync */
+ spec_badop, /* seek */
+ spec_badop, /* remove */
+ spec_badop, /* link */
+ spec_badop, /* rename */
+ spec_badop, /* mkdir */
+ spec_badop, /* rmdir */
+ spec_badop, /* symlink */
+ spec_badop, /* readdir */
+ spec_badop, /* readlink */
+ spec_badop, /* abortop */
+ ufs_inactive, /* inactive */
+ ufs_reclaim, /* reclaim */
+ ufs_lock, /* lock */
+ ufs_unlock, /* unlock */
+ spec_bmap, /* bmap */
+ spec_strategy, /* strategy */
+ ufs_print, /* print */
+ ufs_islocked, /* islocked */
+};
+
+#ifdef FIFO
+int fifo_lookup(),
+ fifo_open(),
+ ufsfifo_read(),
+ ufsfifo_write(),
+ fifo_bmap(),
+ fifo_ioctl(),
+ fifo_select(),
+ ufsfifo_close(),
+ fifo_print(),
+ fifo_badop(),
+ fifo_nullop();
+
+struct vnodeops fifo_inodeops = {
+ fifo_lookup, /* lookup */
+ fifo_badop, /* create */
+ fifo_badop, /* mknod */
+ fifo_open, /* open */
+ ufsfifo_close, /* close */
+ ufs_access, /* access */
+ ufs_getattr, /* getattr */
+ ufs_setattr, /* setattr */
+ ufsfifo_read, /* read */
+ ufsfifo_write, /* write */
+ fifo_ioctl, /* ioctl */
+ fifo_select, /* select */
+ fifo_badop, /* mmap */
+ fifo_nullop, /* fsync */
+ fifo_badop, /* seek */
+ fifo_badop, /* remove */
+ fifo_badop, /* link */
+ fifo_badop, /* rename */
+ fifo_badop, /* mkdir */
+ fifo_badop, /* rmdir */
+ fifo_badop, /* symlink */
+ fifo_badop, /* readdir */
+ fifo_badop, /* readlink */
+ fifo_badop, /* abortop */
+ ufs_inactive, /* inactive */
+ ufs_reclaim, /* reclaim */
+ ufs_lock, /* lock */
+ ufs_unlock, /* unlock */
+ fifo_bmap, /* bmap */
+ fifo_badop, /* strategy */
+ ufs_print, /* print */
+ ufs_islocked, /* islocked */
+};
+#endif /* FIFO */
+
+enum vtype iftovt_tab[16] = {
+ VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON,
+ VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD,
+};
+int vttoif_tab[9] = {
+ 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFIFO, IFMT,
+};
+
+/*
+ * Create a regular file
+ */
+ufs_create(ndp, vap)
+ struct nameidata *ndp;
+ struct vattr *vap;
{
+ struct inode *ip;
+ int error;
- chdirec(&u.u_cdir);
+ if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip))
+ return (error);
+ ndp->ni_vp = ITOV(ip);
+ return (0);
}
-chroot()
+/*
+ * Mknod vnode call
+ */
+/* ARGSUSED */
+ufs_mknod(ndp, vap, cred)
+ struct nameidata *ndp;
+ struct ucred *cred;
+ struct vattr *vap;
{
+ register struct vnode *vp;
+ struct inode *ip;
+ int error;
- if (suser())
- chdirec(&u.u_rdir);
+ if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip))
+ return (error);
+ ip->i_flag |= IACC|IUPD|ICHG;
+ if (vap->va_rdev != VNOVAL) {
+ /*
+ * Want to be able to use this to make badblock
+ * inodes, so don't truncate the dev number.
+ */
+ ip->i_rdev = vap->va_rdev;
+ }
+ /*
+ * Remove inode so that it will be reloaded by iget and
+ * checked to see if it is an alias of an existing entry
+ * in the inode cache.
+ */
+ vp = ITOV(ip);
+ vput(vp);
+ vp->v_type = VNON;
+ vgone(vp);
+ return (0);
}
-chdirec(ipp)
- register struct inode **ipp;
+/*
+ * Open called.
+ *
+ * Nothing to do.
+ */
+/* ARGSUSED */
+ufs_open(vp, mode, cred)
+ struct vnode *vp;
+ int mode;
+ struct ucred *cred;
{
- register struct inode *ip;
- struct a {
- char *fname;
- };
- ip = namei(uchar, 0, 1);
- if(ip == NULL)
- return;
- if((ip->i_mode&IFMT) != IFDIR) {
- u.u_error = ENOTDIR;
- goto bad;
- }
- if(access(ip, IEXEC))
- goto bad;
- iunlock(ip);
- if (*ipp)
- irele(*ipp);
- *ipp = ip;
- return;
+ return (0);
+}
-bad:
- iput(ip);
+/*
+ * Close called
+ *
+ * Update the times on the inode.
+ */
+/* ARGSUSED */
+ufs_close(vp, fflag, cred)
+ struct vnode *vp;
+ int fflag;
+ struct ucred *cred;
+{
+ register struct inode *ip = VTOI(vp);
+
+ if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED))
+ ITIMES(ip, &time, &time);
+ return (0);
+}
+
+ufs_access(vp, mode, cred)
+ struct vnode *vp;
+ int mode;
+ struct ucred *cred;
+{
+
+ return (iaccess(VTOI(vp), mode, cred));
+}
+
+/* ARGSUSED */
+ufs_getattr(vp, vap, cred)
+ struct vnode *vp;
+ register struct vattr *vap;
+ struct ucred *cred;
+{
+ register struct inode *ip = VTOI(vp);
+
+ ITIMES(ip, &time, &time);
+ /*
+ * Copy from inode table
+ */
+ vap->va_fsid = ip->i_dev;
+ vap->va_fileid = ip->i_number;
+ vap->va_mode = ip->i_mode & ~IFMT;
+ vap->va_nlink = ip->i_nlink;
+ vap->va_uid = ip->i_uid;
+ vap->va_gid = ip->i_gid;
+ vap->va_rdev = (dev_t)ip->i_rdev;
+ vap->va_size = ip->i_din.di_qsize.val[0];
+ vap->va_size1 = ip->i_din.di_qsize.val[1];
+ vap->va_atime.tv_sec = ip->i_atime;
+ vap->va_atime.tv_usec = 0;
+ vap->va_mtime.tv_sec = ip->i_mtime;
+ vap->va_mtime.tv_usec = 0;
+ vap->va_ctime.tv_sec = ip->i_ctime;
+ vap->va_ctime.tv_usec = 0;
+ vap->va_flags = ip->i_flags;
+ vap->va_gen = ip->i_gen;
+ /* this doesn't belong here */
+ if (vp->v_type == VBLK)
+ vap->va_blocksize = BLKDEV_IOSIZE;
+ else if (vp->v_type == VCHR)
+ vap->va_blocksize = MAXBSIZE;
+ else
+ vap->va_blocksize = ip->i_fs->fs_bsize;
+ vap->va_bytes = dbtob(ip->i_blocks);
+ vap->va_bytes1 = -1;
+ vap->va_type = vp->v_type;
+ return (0);
}
/*
- * Open system call.
+ * Set attribute vnode op. called from several syscalls
*/
-open()
+ufs_setattr(vp, vap, cred)
+ register struct vnode *vp;
+ register struct vattr *vap;
+ register struct ucred *cred;
{
- register struct inode *ip;
- register struct a {
- char *fname;
- int flags;
- int mode;
- } *uap;
- int checkpermissions = 1;
-
- uap = (struct a *)u.u_ap;
- if (uap->flags&FCREATE) {
- ip = namei(uchar, 1, 1);
- if (ip == NULL) {
- if (u.u_error)
- return;
- ip = maknode(uap->mode&07777&(~ISVTX));
- checkpermissions = 0;
- uap->flags &= ~FTRUNCATE;
+ register struct inode *ip = VTOI(vp);
+ int error = 0;
+
+ /*
+ * Check for unsetable attributes.
+ */
+ if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
+ (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
+ (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
+ ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
+ return (EINVAL);
+ }
+ /*
+ * Go through the fields and update iff not VNOVAL.
+ */
+ if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL)
+ if (error = chown1(vp, vap->va_uid, vap->va_gid, cred))
+ return (error);
+ if (vap->va_size != VNOVAL) {
+ if (vp->v_type == VDIR)
+ return (EISDIR);
+ if (error = itrunc(ip, vap->va_size, 0)) /* XXX IO_SYNC? */
+ return (error);
+ }
+ if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &u.u_acflag)))
+ return (error);
+ if (vap->va_atime.tv_sec != VNOVAL)
+ ip->i_flag |= IACC;
+ if (vap->va_mtime.tv_sec != VNOVAL)
+ ip->i_flag |= IUPD;
+ ip->i_flag |= ICHG;
+ if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1))
+ return (error);
+ }
+ if (vap->va_mode != (u_short)VNOVAL)
+ error = chmod1(vp, (int)vap->va_mode, cred);
+ if (vap->va_flags != VNOVAL) {
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &u.u_acflag)))
+ return (error);
+ if (cred->cr_uid == 0) {
+ ip->i_flags = vap->va_flags;
+ } else {
+ ip->i_flags &= 0xffff0000;
+ ip->i_flags |= (vap->va_flags & 0xffff);
}
- } else
- ip = namei(uchar, 0, 1);
- if (ip == NULL)
- return;
- open1(ip, ++uap->flags, checkpermissions);
+ ip->i_flag |= ICHG;
+ }
+ return (error);
}
-#ifndef NOCOMPAT
/*
- * Creat system call.
+ * Change the mode on a file.
+ * Inode must be locked before calling.
*/
-ocreat()
+chmod1(vp, mode, cred)
+ register struct vnode *vp;
+ register int mode;
+ struct ucred *cred;
{
- register struct inode *ip;
- register struct a {
- char *fname;
- int fmode;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- ip = namei(uchar, 1, 1);
- if (ip == NULL) {
- if (u.u_error)
- return;
- ip = maknode(uap->fmode&07777&(~ISVTX));
- if (ip == NULL)
- return;
- open1(ip, FWRITE, 0);
- } else
- open1(ip, FWRITE|FTRUNCATE, 0);
+ register struct inode *ip = VTOI(vp);
+ int error;
+
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &u.u_acflag)))
+ return (error);
+ ip->i_mode &= ~07777;
+ if (cred->cr_uid) {
+ if (vp->v_type != VDIR)
+ mode &= ~ISVTX;
+ if (!groupmember(ip->i_gid, cred))
+ mode &= ~ISGID;
+ }
+ ip->i_mode |= mode & 07777;
+ ip->i_flag |= ICHG;
+ if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0)
+ xrele(vp);
+ return (0);
}
-#endif
/*
- * Common code for open and creat.
- * Check permissions (if we haven't done so already),
- * allocate an open file structure, and call
- * the device open routine, if any.
+ * Perform chown operation on inode ip;
+ * inode must be locked prior to call.
*/
-open1(ip, mode, checkpermissions)
- register struct inode *ip;
- register mode;
+chown1(vp, uid, gid, cred)
+ register struct vnode *vp;
+ uid_t uid;
+ gid_t gid;
+ struct ucred *cred;
{
- register struct file *fp;
- int i, flags;
+ register struct inode *ip = VTOI(vp);
+#ifdef QUOTA
+ register long change;
+#endif
+ int error;
- if (checkpermissions) {
- if (mode&FREAD)
- if (access(ip, IREAD))
- goto bad;
- if (mode&FWRITE) {
- if (access(ip, IWRITE))
- goto bad;
- if ((ip->i_mode&IFMT) == IFDIR) {
- u.u_error = EISDIR;
- goto bad;
- }
+ if (uid == (u_short)VNOVAL)
+ uid = ip->i_uid;
+ if (gid == (u_short)VNOVAL)
+ gid = ip->i_gid;
+ /*
+ * If we don't own the file, are trying to change the owner
+ * of the file, or are not a member of the target group,
+ * the caller must be superuser or the call fails.
+ */
+ if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid ||
+ !groupmember((gid_t)gid, cred)) &&
+ (error = suser(cred, &u.u_acflag)))
+ return (error);
+#ifdef QUOTA
+ if (ip->i_uid == uid) /* this just speeds things a little */
+ change = 0;
+ else
+ change = ip->i_blocks;
+ (void) chkdq(ip, -change, 1);
+ (void) chkiq(ip->i_dev, ip, ip->i_uid, 1);
+ dqrele(ip->i_dquot);
+#endif
+ if (ip->i_uid != uid && cred->cr_uid != 0)
+ ip->i_mode &= ~ISUID;
+ if (ip->i_gid != gid && cred->cr_uid != 0)
+ ip->i_mode &= ~ISGID;
+ ip->i_uid = uid;
+ ip->i_gid = gid;
+ ip->i_flag |= ICHG;
+#ifdef QUOTA
+ ip->i_dquot = inoquota(ip);
+ (void) chkdq(ip, change, 1);
+ (void) chkiq(ip->i_dev, (struct inode *)NULL, (uid_t)uid, 1);
+ return (u.u_error); /* should == 0 ALWAYS !! */
+#else
+ return (0);
+#endif
+}
+
+/*
+ * Vnode op for reading.
+ */
+/* ARGSUSED */
+ufs_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ register struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+ register struct inode *ip = VTOI(vp);
+ register struct fs *fs;
+ struct buf *bp;
+ daddr_t lbn, bn, rablock;
+ int size, diff, error = 0;
+ long n, on, type;
+
+ if (uio->uio_rw != UIO_READ)
+ panic("ufs_read mode");
+ type = ip->i_mode & IFMT;
+ if (type != IFDIR && type != IFREG && type != IFLNK)
+ panic("ufs_read type");
+ if (uio->uio_resid == 0)
+ return (0);
+ if (uio->uio_offset < 0)
+ return (EINVAL);
+ ip->i_flag |= IACC;
+ fs = ip->i_fs;
+ do {
+ lbn = lblkno(fs, uio->uio_offset);
+ on = blkoff(fs, uio->uio_offset);
+ n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid);
+ diff = ip->i_size - uio->uio_offset;
+ if (diff <= 0)
+ return (0);
+ if (diff < n)
+ n = diff;
+ size = blksize(fs, ip, lbn);
+ rablock = lbn + 1;
+ if (vp->v_lastr + 1 == lbn &&
+ lblktosize(fs, rablock) < ip->i_size)
+ error = breada(ITOV(ip), lbn, size, rablock,
+ blksize(fs, ip, rablock), NOCRED, &bp);
+ else
+ error = bread(ITOV(ip), lbn, size, NOCRED, &bp);
+ vp->v_lastr = lbn;
+ n = MIN(n, size - bp->b_resid);
+ if (error) {
+ brelse(bp);
+ return (error);
}
- }
+ error = uiomove(bp->b_un.b_addr + on, (int)n, uio);
+ if (n + on == fs->fs_bsize || uio->uio_offset == ip->i_size)
+ bp->b_flags |= B_AGE;
+ brelse(bp);
+ } while (error == 0 && uio->uio_resid > 0 && n != 0);
+ return (error);
+}
+/*
+ * Vnode op for writing.
+ */
+ufs_write(vp, uio, ioflag, cred)
+ register struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+ register struct inode *ip = VTOI(vp);
+ register struct fs *fs;
+ struct buf *bp;
+ daddr_t lbn, bn;
+ u_long osize;
+ int i, n, on, flags;
+ int count, size, resid, error = 0;
+
+ if (uio->uio_rw != UIO_WRITE)
+ panic("ufs_write mode");
+ switch (vp->v_type) {
+ case VREG:
+ if (ioflag & IO_APPEND)
+ uio->uio_offset = ip->i_size;
+ /* fall through */
+ case VLNK:
+ break;
+
+ case VDIR:
+ if ((ioflag & IO_SYNC) == 0)
+ panic("ufs_write nonsync dir write");
+ break;
+
+ default:
+ panic("ufs_write type");
+ }
+ if (uio->uio_offset < 0)
+ return (EINVAL);
+ if (uio->uio_resid == 0)
+ return (0);
/*
- * Check locking on inode. Release "inode lock"
- * while doing so in case we block inside flocki.
+ * Maybe this should be above the vnode op call, but so long as
+ * file servers have no limits, i don't think it matters
*/
- flags = 0;
- if (mode&(FRDLOCK|FWRLOCK)) {
- iunlock(ip);
- flags = flocki(ip, 0, mode);
- ilock(ip);
- if (u.u_error)
- goto bad;
+ if (vp->v_type == VREG &&
+ uio->uio_offset + uio->uio_resid >
+ u.u_rlimit[RLIMIT_FSIZE].rlim_cur) {
+ psignal(u.u_procp, SIGXFSZ);
+ return (EFBIG);
}
- if (mode&FTRUNCATE)
- itrunc(ip, 0);
- iunlock(ip);
- if ((fp = falloc()) == NULL)
- goto out;
- fp->f_flag = mode & FMODES;
- fp->f_type = DTYPE_FILE;
- i = u.u_r.r_val1;
- fp->f_inode = ip;
- openi(ip, mode);
- if (u.u_error == 0) {
- u.u_pofile[i] = flags;
- return;
+ resid = uio->uio_resid;
+ osize = ip->i_size;
+ fs = ip->i_fs;
+ flags = 0;
+ if (ioflag & IO_SYNC)
+ flags = B_SYNC;
+ do {
+ lbn = lblkno(fs, uio->uio_offset);
+ on = blkoff(fs, uio->uio_offset);
+ n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid);
+ if (n < fs->fs_bsize)
+ flags |= B_CLRBUF;
+ else
+ flags &= ~B_CLRBUF;
+ if (error = balloc(ip, lbn, (int)(on + n), &bp, flags))
+ break;
+ bn = bp->b_blkno;
+ if (uio->uio_offset + n > ip->i_size)
+ ip->i_size = uio->uio_offset + n;
+ size = blksize(fs, ip, lbn);
+ count = howmany(size, CLBYTES);
+ for (i = 0; i < count; i++)
+ munhash(ip->i_devvp, bn + i * CLBYTES / DEV_BSIZE);
+ n = MIN(n, size - bp->b_resid);
+ error = uiomove(bp->b_un.b_addr + on, n, uio);
+ if (ioflag & IO_SYNC)
+ (void) bwrite(bp);
+ else if (n + on == fs->fs_bsize) {
+ bp->b_flags |= B_AGE;
+ bawrite(bp);
+ } else
+ bdwrite(bp);
+ ip->i_flag |= IUPD|ICHG;
+ if (cred->cr_uid != 0)
+ ip->i_mode &= ~(ISUID|ISGID);
+ } while (error == 0 && uio->uio_resid > 0 && n != 0);
+ if (error && (ioflag & IO_UNIT)) {
+ (void) itrunc(ip, osize, ioflag & IO_SYNC);
+ uio->uio_offset -= resid - uio->uio_resid;
+ uio->uio_resid = resid;
}
- u.u_ofile[i] = NULL;
- fp->f_count--;
-out:
- irele(ip);
- return;
-bad:
- iput(ip);
+ return (error);
+}
+
+/* ARGSUSED */
+ufs_ioctl(vp, com, data, fflag, cred)
+ struct vnode *vp;
+ int com;
+ caddr_t data;
+ int fflag;
+ struct ucred *cred;
+{
+
+ return (ENOTTY);
+}
+
+/* ARGSUSED */
+ufs_select(vp, which, fflags, cred)
+ struct vnode *vp;
+ int which, fflags;
+ struct ucred *cred;
+{
+
+ return (1); /* XXX */
}
/*
- * Mknod system call
+ * Mmap a file
+ *
+ * NB Currently unsupported.
*/
-mknod()
+/* ARGSUSED */
+ufs_mmap(vp, fflags, cred)
+ struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
{
- register struct inode *ip;
- register struct a {
- char *fname;
- int fmode;
- int dev;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- if (suser()) {
- ip = namei(uchar, 1, 0);
- if (ip != NULL) {
- u.u_error = EEXIST;
- goto out;
- }
- }
- if (u.u_error)
- return;
- ip = maknode(uap->fmode);
- if (ip == NULL)
- return;
- if (uap->dev) {
- /*
- * Want to be able to use this to make badblock
- * inodes, so don't truncate the dev number.
- */
- ip->i_rdev = uap->dev;
- ip->i_flag |= IACC|IUPD|ICHG;
- }
-out:
- iput(ip);
+ return (EINVAL);
}
/*
- * link system call
+ * Synch an open file.
*/
-link()
+/* ARGSUSED */
+ufs_fsync(vp, fflags, cred, waitfor)
+ struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+ int waitfor;
{
- register struct inode *ip, *xp;
- register struct a {
- char *target;
- char *linkname;
- } *uap;
+ struct inode *ip = VTOI(vp);
- uap = (struct a *)u.u_ap;
- ip = namei(uchar, 0, 1); /* well, this routine is doomed anyhow */
- if (ip == NULL)
- return;
- if ((ip->i_mode&IFMT)==IFDIR && !suser()) {
+ if (fflags&FWRITE)
+ ip->i_flag |= ICHG;
+ vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0);
+ return (iupdat(ip, &time, &time, waitfor == MNT_WAIT));
+}
+
+/*
+ * Seek on a file
+ *
+ * Nothing to do, so just return.
+ */
+/* ARGSUSED */
+ufs_seek(vp, oldoff, newoff, cred)
+ struct vnode *vp;
+ off_t oldoff, newoff;
+ struct ucred *cred;
+{
+
+ return (0);
+}
+
+/*
+ * ufs remove
+ * Hard to avoid races here, especially
+ * in unlinking directories.
+ */
+ufs_remove(ndp)
+ struct nameidata *ndp;
+{
+ register struct inode *ip, *dp;
+ int error;
+
+ ip = VTOI(ndp->ni_vp);
+ dp = VTOI(ndp->ni_dvp);
+ error = dirremove(ndp);
+ if (!error) {
+ ip->i_nlink--;
+ ip->i_flag |= ICHG;
+ }
+ if (dp == ip)
+ vrele(ITOV(ip));
+ else
iput(ip);
- return;
+ iput(dp);
+ return (error);
+}
+
+/*
+ * link vnode call
+ */
+ufs_link(vp, ndp)
+ register struct vnode *vp;
+ register struct nameidata *ndp;
+{
+ register struct inode *ip = VTOI(vp);
+ int error;
+
+ if (ndp->ni_dvp != vp)
+ ILOCK(ip);
+ if (ip->i_nlink == LINK_MAX - 1) {
+ error = EMLINK;
+ goto out;
}
ip->i_nlink++;
ip->i_flag |= ICHG;
- iupdat(ip, &time.tv_sec, &time.tv_sec, 1);
- iunlock(ip);
- u.u_dirp = (caddr_t)uap->linkname;
- xp = namei(uchar, 1, 0);
- if (xp != NULL) {
- u.u_error = EEXIST;
- iput(xp);
- goto out;
- }
- if (u.u_error)
- goto out;
- if (u.u_pdir->i_dev != ip->i_dev) {
- iput(u.u_pdir);
- u.u_error = EXDEV;
- goto out;
- }
- direnter(ip);
+ error = iupdat(ip, &time, &time, 1);
+ if (!error)
+ error = direnter(ip, ndp);
out:
- if (u.u_error) {
+ if (ndp->ni_dvp != vp)
+ IUNLOCK(ip);
+ if (error) {
ip->i_nlink--;
ip->i_flag |= ICHG;
}
- irele(ip);
+ return (error);
}
/*
- * symlink -- make a symbolic link
+ * Rename system call.
+ * rename("foo", "bar");
+ * is essentially
+ * unlink("bar");
+ * link("foo", "bar");
+ * unlink("foo");
+ * but ``atomically''. Can't do full commit without saving state in the
+ * inode on disk which isn't feasible at this time. Best we can do is
+ * always guarantee the target exists.
+ *
+ * Basic algorithm is:
+ *
+ * 1) Bump link count on source while we're linking it to the
+ * target. This also ensure the inode won't be deleted out
+ * from underneath us while we work (it may be truncated by
+ * a concurrent `trunc' or `open' for creation).
+ * 2) Link source to destination. If destination already exists,
+ * delete it first.
+ * 3) Unlink source reference to inode if still around. If a
+ * directory was moved and the parent of the destination
+ * is different from the source, patch the ".." entry in the
+ * directory.
*/
-symlink()
+ufs_rename(fndp, tndp)
+ register struct nameidata *fndp, *tndp;
{
- register struct a {
- char *target;
- char *linkname;
- } *uap;
- register struct inode *ip;
- register char *tp;
- register c, nc;
-
- uap = (struct a *)u.u_ap;
- tp = uap->target;
- nc = 0;
- while (c = fubyte(tp)) {
- if (c < 0) {
- u.u_error = EFAULT;
- return;
+ register struct inode *ip, *xp, *dp;
+ struct dirtemplate dirbuf;
+ int doingdirectory = 0, oldparent = 0, newparent = 0;
+ int error = 0;
+
+ dp = VTOI(fndp->ni_dvp);
+ ip = VTOI(fndp->ni_vp);
+ ILOCK(ip);
+ if ((ip->i_mode&IFMT) == IFDIR) {
+ register struct direct *d = &fndp->ni_dent;
+
+ /*
+ * Avoid ".", "..", and aliases of "." for obvious reasons.
+ */
+ if ((d->d_namlen == 1 && d->d_name[0] == '.') || dp == ip ||
+ fndp->ni_isdotdot || (ip->i_flag & IRENAME)) {
+ IUNLOCK(ip);
+ ufs_abortop(fndp);
+ ufs_abortop(tndp);
+ return (EINVAL);
}
- tp++;
- nc++;
+ ip->i_flag |= IRENAME;
+ oldparent = dp->i_number;
+ doingdirectory++;
}
- u.u_dirp = uap->linkname;
- ip = namei(uchar, 1, 0);
- if (ip) {
- iput(ip);
- u.u_error = EEXIST;
- return;
+ vrele(fndp->ni_dvp);
+
+ /*
+ * 1) Bump link count while we're moving stuff
+ * around. If we crash somewhere before
+ * completing our work, the link count
+ * may be wrong, but correctable.
+ */
+ ip->i_nlink++;
+ ip->i_flag |= ICHG;
+ error = iupdat(ip, &time, &time, 1);
+ IUNLOCK(ip);
+
+ /*
+ * When the target exists, both the directory
+ * and target vnodes are returned locked.
+ */
+ dp = VTOI(tndp->ni_dvp);
+ xp = NULL;
+ if (tndp->ni_vp)
+ xp = VTOI(tndp->ni_vp);
+ /*
+ * If ".." must be changed (ie the directory gets a new
+ * parent) then the source directory must not be in the
+ * directory heirarchy above the target, as this would
+ * orphan everything below the source directory. Also
+ * the user must have write permission in the source so
+ * as to be able to change "..". We must repeat the call
+ * to namei, as the parent directory is unlocked by the
+ * call to checkpath().
+ */
+ if (oldparent != dp->i_number)
+ newparent = dp->i_number;
+ if (doingdirectory && newparent) {
+ if (error = iaccess(ip, IWRITE, tndp->ni_cred))
+ goto bad;
+ tndp->ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE;
+ do {
+ dp = VTOI(tndp->ni_dvp);
+ if (xp != NULL)
+ iput(xp);
+ if (error = checkpath(ip, dp, tndp->ni_cred))
+ goto out;
+ if (error = namei(tndp))
+ goto out;
+ xp = NULL;
+ if (tndp->ni_vp)
+ xp = VTOI(tndp->ni_vp);
+ } while (dp != VTOI(tndp->ni_dvp));
}
- if (u.u_error)
- return;
- ip = maknode(IFLNK | 0777);
- if (ip == NULL)
- return;
- u.u_error = rdwri(UIO_WRITE, ip, uap->target, nc, 0, 0, (int *)0);
- iput(ip);
+ /*
+ * 2) If target doesn't exist, link the target
+ * to the source and unlink the source.
+ * Otherwise, rewrite the target directory
+ * entry to reference the source inode and
+ * expunge the original entry's existence.
+ */
+ if (xp == NULL) {
+ if (dp->i_dev != ip->i_dev)
+ panic("rename: EXDEV");
+ /*
+ * Account for ".." in new directory.
+ * When source and destination have the same
+ * parent we don't fool with the link count.
+ */
+ if (doingdirectory && newparent) {
+ dp->i_nlink++;
+ dp->i_flag |= ICHG;
+ error = iupdat(dp, &time, &time, 1);
+ }
+ if (error = direnter(ip, tndp))
+ goto out;
+ } else {
+ if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
+ panic("rename: EXDEV");
+ /*
+ * Short circuit rename(foo, foo).
+ */
+ if (xp->i_number == ip->i_number)
+ panic("rename: same file");
+ /*
+ * If the parent directory is "sticky", then the user must
+ * own the parent directory, or the destination of the rename,
+ * otherwise the destination may not be changed (except by
+ * root). This implements append-only directories.
+ */
+ if ((dp->i_mode & ISVTX) && tndp->ni_cred->cr_uid != 0 &&
+ tndp->ni_cred->cr_uid != dp->i_uid &&
+ xp->i_uid != tndp->ni_cred->cr_uid) {
+ error = EPERM;
+ goto bad;
+ }
+ /*
+ * Target must be empty if a directory
+ * and have no links to it.
+ * Also, insure source and target are
+ * compatible (both directories, or both
+ * not directories).
+ */
+ if ((xp->i_mode&IFMT) == IFDIR) {
+ if (!dirempty(xp, dp->i_number, tndp->ni_cred) ||
+ xp->i_nlink > 2) {
+ error = ENOTEMPTY;
+ goto bad;
+ }
+ if (!doingdirectory) {
+ error = ENOTDIR;
+ goto bad;
+ }
+ cache_purge(ITOV(dp));
+ } else if (doingdirectory) {
+ error = EISDIR;
+ goto bad;
+ }
+ if (error = dirrewrite(dp, ip, tndp))
+ goto bad;
+ vput(ITOV(dp));
+ /*
+ * Adjust the link count of the target to
+ * reflect the dirrewrite above. If this is
+ * a directory it is empty and there are
+ * no links to it, so we can squash the inode and
+ * any space associated with it. We disallowed
+ * renaming over top of a directory with links to
+ * it above, as the remaining link would point to
+ * a directory without "." or ".." entries.
+ */
+ xp->i_nlink--;
+ if (doingdirectory) {
+ if (--xp->i_nlink != 0)
+ panic("rename: linked directory");
+ error = itrunc(xp, (u_long)0, IO_SYNC);
+ }
+ xp->i_flag |= ICHG;
+ iput(xp);
+ xp = NULL;
+ }
+
+ /*
+ * 3) Unlink the source.
+ */
+ fndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF;
+ (void)namei(fndp);
+ if (fndp->ni_vp != NULL) {
+ xp = VTOI(fndp->ni_vp);
+ dp = VTOI(fndp->ni_dvp);
+ } else {
+ if (fndp->ni_dvp != NULL)
+ vput(fndp->ni_dvp);
+ xp = NULL;
+ dp = NULL;
+ }
+ /*
+ * Ensure that the directory entry still exists and has not
+ * changed while the new name has been entered. If the source is
+ * a file then the entry may have been unlinked or renamed. In
+ * either case there is no further work to be done. If the source
+ * is a directory then it cannot have been rmdir'ed; its link
+ * count of three would cause a rmdir to fail with ENOTEMPTY.
+ * The IRENAME flag ensures that it cannot be moved by another
+ * rename.
+ */
+ if (xp != ip) {
+ if (doingdirectory)
+ panic("rename: lost dir entry");
+ } else {
+ /*
+ * If the source is a directory with a
+ * new parent, the link count of the old
+ * parent directory must be decremented
+ * and ".." set to point to the new parent.
+ */
+ if (doingdirectory && newparent) {
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf,
+ sizeof (struct dirtemplate), (off_t)0,
+ UIO_SYSSPACE, IO_NODELOCKED,
+ tndp->ni_cred, (int *)0);
+ if (error == 0) {
+ if (dirbuf.dotdot_namlen != 2 ||
+ dirbuf.dotdot_name[0] != '.' ||
+ dirbuf.dotdot_name[1] != '.') {
+ dirbad(xp, 12, "rename: mangled dir");
+ } else {
+ dirbuf.dotdot_ino = newparent;
+ (void) vn_rdwr(UIO_WRITE, ITOV(xp),
+ (caddr_t)&dirbuf,
+ sizeof (struct dirtemplate),
+ (off_t)0, UIO_SYSSPACE,
+ IO_NODELOCKED|IO_SYNC,
+ tndp->ni_cred, (int *)0);
+ cache_purge(ITOV(dp));
+ }
+ }
+ }
+ error = dirremove(fndp);
+ if (!error) {
+ xp->i_nlink--;
+ xp->i_flag |= ICHG;
+ }
+ xp->i_flag &= ~IRENAME;
+ }
+ if (dp)
+ vput(ITOV(dp));
+ if (xp)
+ vput(ITOV(xp));
+ vrele(ITOV(ip));
+ return (error);
+
+bad:
+ if (xp)
+ vput(ITOV(xp));
+ vput(ITOV(dp));
+out:
+ ip->i_nlink--;
+ ip->i_flag |= ICHG;
+ vrele(ITOV(ip));
+ return (error);
}
/*
- * Unlink system call.
- * Hard to avoid races here, especially
- * in unlinking directories.
+ * A virgin directory (no blushing please).
+ */
+struct dirtemplate mastertemplate = {
+ 0, 12, 1, ".",
+ 0, DIRBLKSIZ - 12, 2, ".."
+};
+
+/*
+ * Mkdir system call
*/
-unlink()
+ufs_mkdir(ndp, vap)
+ struct nameidata *ndp;
+ struct vattr *vap;
{
- register struct inode *ip, *pp;
- struct a {
- char *fname;
- };
- int unlinkingdot = 0;
+ register struct inode *ip, *dp;
+ struct inode *tip;
+ struct vnode *dvp;
+ struct dirtemplate dirtemplate;
+ int error;
+ int dmode;
+
+ dvp = ndp->ni_dvp;
+ dp = VTOI(dvp);
+ dmode = vap->va_mode&0777;
+ dmode |= IFDIR;
+ /*
+ * Must simulate part of maknode here
+ * in order to acquire the inode, but
+ * not have it entered in the parent
+ * directory. The entry is made later
+ * after writing "." and ".." entries out.
+ */
+ error = ialloc(dp, dirpref(dp->i_fs), dmode, &tip);
+ if (error) {
+ iput(dp);
+ return (error);
+ }
+ ip = tip;
+#ifdef QUOTA
+ if (ip->i_dquot != NODQUOT)
+ panic("mkdir: dquot");
+#endif
+ ip->i_flag |= IACC|IUPD|ICHG;
+ ip->i_mode = dmode;
+ ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */
+ ip->i_nlink = 2;
+ ip->i_uid = ndp->ni_cred->cr_uid;
+ ip->i_gid = dp->i_gid;
+#ifdef QUOTA
+ ip->i_dquot = inoquota(ip);
+#endif
+ error = iupdat(ip, &time, &time, 1);
- pp = namei(uchar, 2, 0);
- if (pp == NULL)
- return;
+ /*
+ * Bump link count in parent directory
+ * to reflect work done below. Should
+ * be done before reference is created
+ * so reparation is possible if we crash.
+ */
+ dp->i_nlink++;
+ dp->i_flag |= ICHG;
+ error = iupdat(dp, &time, &time, 1);
/*
- * Check for unlink(".")
- * to avoid hanging on the iget
+ * Initialize directory with "."
+ * and ".." from static template.
*/
- if (pp->i_number == u.u_dent.d_ino) {
- ip = pp;
- ip->i_count++;
- unlinkingdot++;
- } else
- ip = iget(pp->i_dev, pp->i_fs, u.u_dent.d_ino);
- if(ip == NULL)
- goto out1;
- if((ip->i_mode&IFMT)==IFDIR && !suser())
- goto out;
+ dirtemplate = mastertemplate;
+ dirtemplate.dot_ino = ip->i_number;
+ dirtemplate.dotdot_ino = dp->i_number;
+ error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate,
+ sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
+ IO_NODELOCKED|IO_SYNC, ndp->ni_cred, (int *)0);
+ if (error) {
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ goto bad;
+ }
+ if (DIRBLKSIZ > dp->i_fs->fs_fsize)
+ panic("mkdir: blksize"); /* XXX - should grow w/balloc() */
+ else
+ ip->i_size = DIRBLKSIZ;
/*
- * Don't unlink a mounted file.
+ * Directory all set up, now
+ * install the entry for it in
+ * the parent directory.
*/
- if (ip->i_dev != pp->i_dev) {
- u.u_error = EBUSY;
- goto out;
+ error = direnter(ip, ndp);
+ dp = NULL;
+ if (error) {
+ ndp->ni_nameiop = LOOKUP | NOCACHE;
+ error = namei(ndp);
+ if (!error) {
+ dp = VTOI(ndp->ni_vp);
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ }
}
- if (ip->i_flag&ITEXT)
- xrele(ip); /* try once to free text */
- if (dirremove()) {
- ip->i_nlink--;
+bad:
+ /*
+ * No need to do an explicit itrunc here,
+ * vrele will do this for us because we set
+ * the link count to 0.
+ */
+ if (error) {
+ ip->i_nlink = 0;
ip->i_flag |= ICHG;
- }
-out:
- if (unlinkingdot)
- irele(ip);
- else
iput(ip);
-out1:
- iput(pp);
+ } else
+ ndp->ni_vp = ITOV(ip);
+ if (dp)
+ iput(dp);
+ return (error);
}
/*
- * Seek system call
+ * Rmdir system call.
*/
-lseek()
+ufs_rmdir(ndp)
+ register struct nameidata *ndp;
{
- register struct file *fp;
- register struct a {
- int fd;
- off_t off;
- int sbase;
- } *uap;
+ register struct inode *ip, *dp;
+ int error = 0;
- uap = (struct a *)u.u_ap;
- fp = getf(uap->fd);
- if (fp == NULL)
- return;
- if (fp->f_type == DTYPE_SOCKET) {
- u.u_error = ESPIPE;
- return;
+ ip = VTOI(ndp->ni_vp);
+ dp = VTOI(ndp->ni_dvp);
+ /*
+ * No rmdir "." please.
+ */
+ if (dp == ip) {
+ vrele(ITOV(dp));
+ iput(ip);
+ return (EINVAL);
}
- if (uap->sbase == FSEEK_RELATIVE)
- uap->off += fp->f_offset;
- else if (uap->sbase == FSEEK_EOF)
- uap->off += fp->f_inode->i_size;
- fp->f_offset = uap->off;
- u.u_r.r_off = uap->off;
+ /*
+ * Verify the directory is empty (and valid).
+ * (Rmdir ".." won't be valid since
+ * ".." will contain a reference to
+ * the current directory and thus be
+ * non-empty.)
+ */
+ if (ip->i_nlink != 2 || !dirempty(ip, dp->i_number, ndp->ni_cred)) {
+ error = ENOTEMPTY;
+ goto out;
+ }
+ /*
+ * Delete reference to directory before purging
+ * inode. If we crash in between, the directory
+ * will be reattached to lost+found,
+ */
+ if (error = dirremove(ndp))
+ goto out;
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ cache_purge(ITOV(dp));
+ iput(dp);
+ ndp->ni_dvp = NULL;
+ /*
+ * Truncate inode. The only stuff left
+ * in the directory is "." and "..". The
+ * "." reference is inconsequential since
+ * we're quashing it. The ".." reference
+ * has already been adjusted above. We've
+ * removed the "." reference and the reference
+ * in the parent directory, but there may be
+ * other hard links so decrement by 2 and
+ * worry about them later.
+ */
+ ip->i_nlink -= 2;
+ error = itrunc(ip, (u_long)0, IO_SYNC);
+ cache_purge(ITOV(ip));
+out:
+ if (ndp->ni_dvp)
+ iput(dp);
+ iput(ip);
+ return (error);
}
/*
- * Access system call
+ * symlink -- make a symbolic link
*/
-saccess()
+ufs_symlink(ndp, vap, target)
+ struct nameidata *ndp;
+ struct vattr *vap;
+ char *target;
{
- register svuid, svgid;
- register struct inode *ip;
- register struct a {
- char *fname;
- int fmode;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- svuid = u.u_uid;
- svgid = u.u_gid;
- u.u_uid = u.u_ruid;
- u.u_gid = u.u_rgid;
- ip = namei(uchar, 0, 1);
- if (ip != NULL) {
- if (uap->fmode&FACCESS_READ && access(ip, IREAD))
- goto done;
- if (uap->fmode&FACCESS_WRITE && access(ip, IWRITE))
- goto done;
- if (uap->fmode&FACCESS_EXECUTE && access(ip, IEXEC))
- goto done;
-done:
- iput(ip);
- }
- u.u_uid = svuid;
- u.u_gid = svgid;
+ struct inode *ip;
+ int error;
+
+ error = maknode(IFLNK | vap->va_mode, ndp, &ip);
+ if (error)
+ return (error);
+ error = vn_rdwr(UIO_WRITE, ITOV(ip), target, strlen(target), (off_t)0,
+ UIO_SYSSPACE, IO_NODELOCKED, ndp->ni_cred, (int *)0);
+ iput(ip);
+ return (error);
}
/*
- * the fstat system call.
+ * Vnode op for read and write
*/
-fstat()
+ufs_readdir(vp, uio, cred, eofflagp)
+ struct vnode *vp;
+ register struct uio *uio;
+ struct ucred *cred;
+ int *eofflagp;
{
- register struct file *fp;
- register struct a {
- int fd;
- struct stat *sb;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- fp = getf(uap->fd);
- if (fp == NULL)
- return;
- if (fp->f_type == DTYPE_SOCKET)
- u.u_error = sostat(fp->f_socket, uap->sb);
+ int count, lost, error;
+
+ count = uio->uio_resid;
+ count &= ~(DIRBLKSIZ - 1);
+ lost = uio->uio_resid - count;
+ if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1)))
+ return (EINVAL);
+ uio->uio_resid = count;
+ uio->uio_iov->iov_len = count;
+ error = ufs_read(vp, uio, 0, cred);
+ uio->uio_resid += lost;
+ if ((VTOI(vp)->i_size - uio->uio_offset) <= 0)
+ *eofflagp = 1;
else
- stat1(fp->f_inode, uap->sb);
+ *eofflagp = 0;
+ return (error);
}
/*
- * Stat system call. This version follows links.
+ * Return target name of a symbolic link
*/
-stat()
+ufs_readlink(vp, uiop, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
{
- register struct inode *ip;
- register struct a {
- char *fname;
- struct stat *sb;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- ip = namei(uchar, 0, 1);
- if (ip == NULL)
- return;
- stat1(ip, uap->sb);
- iput(ip);
+
+ return (ufs_read(vp, uiop, 0, cred));
}
/*
- * Lstat system call. This version does not follow links.
+ * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually
+ * done. Iff ni_vp/ni_dvp not null and locked, unlock.
*/
-lstat()
+ufs_abortop(ndp)
+ register struct nameidata *ndp;
{
- register struct inode *ip;
- register struct a {
- char *fname;
- struct stat *sb;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- ip = namei(uchar, 0, 0);
- if (ip == NULL)
- return;
- stat1(ip, uap->sb);
- iput(ip);
+
+ if (ndp->ni_dvp) {
+ if (VOP_ISLOCKED(ndp->ni_dvp))
+ VOP_UNLOCK(ndp->ni_dvp);
+ vrele(ndp->ni_dvp);
+ }
+ if (ndp->ni_vp) {
+ if (VOP_ISLOCKED(ndp->ni_vp))
+ VOP_UNLOCK(ndp->ni_vp);
+ vrele(ndp->ni_vp);
+ }
+ return;
}
/*
- * The basic routine for fstat and stat:
- * get the inode and pass appropriate parts back.
+ * Lock an inode.
*/
-stat1(ip, ub)
- register struct inode *ip;
- struct stat *ub;
+ufs_lock(vp)
+ struct vnode *vp;
{
- struct stat ds;
+ register struct inode *ip = VTOI(vp);
- IUPDAT(ip, &time.tv_sec, &time.tv_sec, 0);
- /*
- * Copy from inode table
- */
- ds.st_dev = ip->i_dev;
- ds.st_ino = ip->i_number;
- ds.st_mode = ip->i_mode;
- ds.st_nlink = ip->i_nlink;
- ds.st_uid = ip->i_uid;
- ds.st_gid = ip->i_gid;
- ds.st_rdev = (dev_t)ip->i_rdev;
- ds.st_size = ip->i_size;
- ds.st_atime = ip->i_atime;
- ds.st_mtime = ip->i_mtime;
- ds.st_ctime = ip->i_ctime;
- /* this doesn't belong here */
- if ((ip->i_mode&IFMT) == IFBLK)
- ds.st_blksize = BLKDEV_IOSIZE;
- else if ((ip->i_mode&IFMT) == IFCHR)
- ds.st_blksize = MAXBSIZE;
- else
- ds.st_blksize = ip->i_fs->fs_bsize;
- if (copyout((caddr_t)&ds, (caddr_t)ub, sizeof(ds)) < 0)
- u.u_error = EFAULT;
+ ILOCK(ip);
+ return (0);
}
/*
- * Return target name of a symbolic link
+ * Unlock an inode.
*/
-readlink()
+ufs_unlock(vp)
+ struct vnode *vp;
{
- register struct inode *ip;
- register struct a {
- char *name;
- char *buf;
- int count;
- } *uap = (struct a *)u.u_ap;
- int resid;
-
- ip = namei(uchar, 0, 0);
- if (ip == NULL)
- return;
- if ((ip->i_mode&IFMT) != IFLNK) {
- u.u_error = ENXIO;
- goto out;
- }
- u.u_error = rdwri(UIO_READ, ip, uap->buf, uap->count, 0, 0, &resid);
-out:
- iput(ip);
- u.u_r.r_val1 = uap->count - resid;
-}
-
-chmod()
-{
- struct inode *ip;
- struct a {
- char *fname;
- int fmode;
- } *uap;
+ register struct inode *ip = VTOI(vp);
- uap = (struct a *)u.u_ap;
- if ((ip = owner(1)) == NULL)
- return;
- chmod1(ip, uap->fmode);
+ if (!(ip->i_flag & ILOCKED))
+ panic("ufs_unlock NOT LOCKED");
+ IUNLOCK(ip);
+ return (0);
}
-fchmod()
+/*
+ * Check for a locked inode.
+ */
+ufs_islocked(vp)
+ struct vnode *vp;
{
- struct a {
- int fd;
- int fmode;
- } *uap;
- register struct inode *ip;
- register struct file *fp;
- uap = (struct a *)u.u_ap;
- fp = getf(uap->fd);
- if (fp == NULL)
- return;
- if (fp->f_type == DTYPE_SOCKET) {
- u.u_error = EINVAL;
- return;
- }
- ip = fp->f_inode;
- ilock(ip);
- if (u.u_uid != ip->i_uid && !suser()) {
- iunlock(ip);
- return;
- }
- chmod1(ip, uap->fmode);
+ if (VTOI(vp)->i_flag & ILOCKED)
+ return (1);
+ return (0);
}
-chmod1(ip, mode)
- register struct inode *ip;
- register int mode;
+/*
+ * Get access to bmap
+ */
+ufs_bmap(vp, bn, vpp, bnp)
+ struct vnode *vp;
+ daddr_t bn;
+ struct vnode **vpp;
+ daddr_t *bnp;
{
- register int *gp;
+ struct inode *ip = VTOI(vp);
- ip->i_mode &= ~07777;
- if (u.u_uid) {
- mode &= ~ISVTX;
- for (gp = u.u_groups; gp < &u.u_groups[NGROUPS]; gp++)
- if (*gp == ip->i_gid)
- goto ok;
- mode &= ~ISGID;
-ok:
- ;
-#ifdef MUSH
- if (u.u_quota->q_syflags & QF_UMASK && u.u_uid != 0 &&
- (ip->i_mode & IFMT) != IFCHR)
- mode &= ~u.u_cmask;
-#endif
- }
- ip->i_mode |= mode&07777;
- ip->i_flag |= ICHG;
- if (ip->i_flag&ITEXT && (ip->i_mode&ISVTX)==0)
- xrele(ip);
- iput(ip);
+ if (vpp != NULL)
+ *vpp = ip->i_devvp;
+ if (bnp == NULL)
+ return (0);
+ return (bmap(ip, bn, bnp, (daddr_t *)0, (int *)0));
}
-chown()
+/*
+ * Just call the device strategy routine
+ */
+int checkoverlap = 1;
+
+ufs_strategy(bp)
+ register struct buf *bp;
{
- struct inode *ip;
- struct a {
- char *fname;
- int uid;
- int gid;
- } *uap;
-
- uap = (struct a *)u.u_ap;
- if (!suser() || (ip = owner(0)) == NULL)
- return;
- chown1(ip, uap->uid, uap->gid);
+ register struct inode *ip = VTOI(bp->b_vp);
+ register struct buf *ep;
+ struct vnode *vp;
+ struct buf *ebp;
+ daddr_t start, last;
+ int error;
+
+ if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
+ panic("ufs_strategy: spec");
+ if (bp->b_blkno == bp->b_lblkno) {
+ if (error = bmap(ip, bp->b_lblkno, &bp->b_blkno))
+ return (error);
+ if ((long)bp->b_blkno == -1)
+ clrbuf(bp);
+ }
+ if ((long)bp->b_blkno == -1) {
+ biodone(bp);
+ return (0);
+ }
+ if (checkoverlap) {
+ ebp = &buf[nbuf];
+ start = bp->b_blkno;
+ last = start + btodb(bp->b_bcount) - 1;
+ for (ep = buf; ep < ebp; ep++) {
+ if (ep == bp || (ep->b_flags & B_INVAL) ||
+ ep->b_vp == (struct vnode *)0)
+ continue;
+ if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0))
+ continue;
+ if (vp != ip->i_devvp)
+ continue;
+ /* look for overlap */
+ if (ep->b_bcount == 0 || ep->b_blkno > last ||
+ ep->b_blkno + btodb(ep->b_bcount) <= start)
+ continue;
+ vprint("Disk overlap", vp);
+ printf("\tstart %d, end %d overlap start %d, end %d\n",
+ start, last, ep->b_blkno,
+ ep->b_blkno + btodb(ep->b_bcount) - 1);
+ }
+ }
+ vp = ip->i_devvp;
+ bp->b_dev = vp->v_rdev;
+ (*(vp->v_op->vn_strategy))(bp);
+ return (0);
}
-fchown()
+/*
+ * Print out the contents of an inode.
+ */
+ufs_print(vp)
+ struct vnode *vp;
{
- struct a {
- int fd;
- int uid;
- int gid;
- } *uap;
- register struct inode *ip;
- register struct file *fp;
-
- uap = (struct a *)u.u_ap;
- fp = getf(uap->fd);
- if (fp == NULL)
- return;
- if (fp->f_type == DTYPE_SOCKET) {
- u.u_error = EINVAL;
+ register struct inode *ip = VTOI(vp);
+
+ printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number,
+ major(ip->i_dev), minor(ip->i_dev));
+#ifdef FIFO
+ if (vp->v_type == VFIFO)
+ fifo_printinfo(vp);
+#endif /* FIFO */
+ printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : "");
+ if (ip->i_spare0 == 0)
return;
- }
- ip = fp->f_inode;
- ilock(ip);
- if (!suser()) {
- iunlock(ip);
- return;
- }
- chown1(ip, uap->uid, uap->gid);
+ printf("\towner pid %d", ip->i_spare0);
+ if (ip->i_spare1)
+ printf(" waiting pid %d", ip->i_spare1);
+ printf("\n");
}
/*
- * Perform chown operation on inode ip;
- * inode must be locked prior to call.
+ * Read wrapper for special devices.
*/
-chown1(ip, uid, gid)
- register struct inode *ip;
- int uid, gid;
+ufsspec_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
{
-#ifdef QUOTA
- register long change;
/*
- * This doesn't allow for holes in files (which hopefully don't
- * happen often in files that we chown), and is not accurate anyway
- * (eg: it totally ignores 3 level indir blk files - but hopefully
- * noone who can make a file that big will have a quota)
+ * Set access flag.
*/
- if (ip->i_uid == uid)
- change = 0;
- else {
- register struct fs *fs = ip->i_fs;
-
- if (ip->i_size > (change = NDADDR * fs->fs_bsize)) {
- register off_t size;
-
- size = blkroundup(fs, ip->i_size) - change;
- change += size;
- change += fs->fs_bsize;
- /* this assumes NIADDR <= 2 */
- if (size > NINDIR(fs) * fs->fs_bsize)
- change += fs->fs_bsize;
- } else
- change = fragroundup(fs, ip->i_size);
- change /= DEV_BSIZE;
- }
- chkdq(ip, -change, 1);
- chkiq(ip->i_dev, ip, ip->i_uid, 1);
- dqrele(ip->i_dquot);
-#endif
- /*
- * keep uid/gid's in sane range -- no err,
- * so chown(file, uid, -1) will do something useful
- */
- if (uid >= 0 && uid <= 32767) /* should have a constant */
- ip->i_uid = uid;
- if (gid >= 0 && gid <= 32767) /* same here */
- ip->i_gid = gid;
- ip->i_flag |= ICHG;
- if (u.u_ruid != 0)
- ip->i_mode &= ~(ISUID|ISGID);
-#ifdef QUOTA
- ip->i_dquot = inoquota(ip);
- chkdq(ip, change, 1);
- chkiq(ip->i_dev, NULL, uid, 1);
-#endif
- iput(ip);
+ VTOI(vp)->i_flag |= IACC;
+ return (spec_read(vp, uio, ioflag, cred));
}
/*
- * Set IUPD and IACC times on file.
- * Can't set ICHG.
+ * Write wrapper for special devices.
*/
-utime()
+ufsspec_write(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
{
- register struct a {
- char *fname;
- time_t *tptr;
- } *uap;
- register struct inode *ip;
- time_t tv[2];
- uap = (struct a *)u.u_ap;
- if ((ip = owner(1)) == NULL)
- return;
- if (copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof(tv))) {
- u.u_error = EFAULT;
- } else {
- ip->i_flag |= IACC|IUPD|ICHG;
- iupdat(ip, &tv[0], &tv[1], 0);
- }
- iput(ip);
+ /*
+ * Set update and change flags.
+ */
+ VTOI(vp)->i_flag |= IUPD|ICHG;
+ return (spec_write(vp, uio, ioflag, cred));
}
-sync()
+/*
+ * Close wrapper for special devices.
+ *
+ * Update the times on the inode then do device close.
+ */
+ufsspec_close(vp, fflag, cred)
+ struct vnode *vp;
+ int fflag;
+ struct ucred *cred;
{
+ register struct inode *ip = VTOI(vp);
- update(0);
+ if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED))
+ ITIMES(ip, &time, &time);
+ return (spec_close(vp, fflag, cred));
}
-flock()
+#ifdef FIFO
+/*
+ * Read wrapper for fifo's
+ */
+ufsfifo_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
{
- struct a {
- int fd;
- int how;
- } *uap;
- register struct file *fp;
- register int cmd, flags;
- uap = (struct a *)u.u_ap;
- fp = getf(uap->fd);
- if (fp == NULL)
- return;
- if (fp->f_type == DTYPE_SOCKET) { /* XXX */
- u.u_error = EINVAL;
- return;
- }
- cmd = uap->how;
- flags = u.u_pofile[uap->fd] & (RDLOCK|WRLOCK);
- if (cmd&FUNLOCK) {
- if (flags == 0) {
- u.u_error = EINVAL;
- return;
- }
- funlocki(fp->f_inode, flags);
- u.u_pofile[uap->fd] &= ~(RDLOCK|WRLOCK);
- return;
- }
/*
- * No reason to write lock a file we've already
- * write locked, similarly with a read lock.
+ * Set access flag.
*/
- if ((flags&WRLOCK) && (cmd&FWRLOCK) ||
- (flags&RDLOCK) && (cmd&FRDLOCK))
- return;
- u.u_pofile[uap->fd] = flocki(fp->f_inode, u.u_pofile[uap->fd], cmd);
-}
-
-truncate()
-{
- struct a {
- char *fname;
- int length;
- } *uap = (struct a *)u.u_ap;
- struct inode *ip;
-
- ip = namei(uchar, 0, 1);
- if (ip == NULL)
- return;
- if (access(ip, IWRITE))
- goto bad;
- if ((ip->i_mode&IFMT) == IFDIR) {
- u.u_error = EISDIR;
- goto bad;
- }
- itrunc(ip, uap->length);
- return;
-bad:
- iput(ip);
+ VTOI(vp)->i_flag |= IACC;
+ return (fifo_read(vp, uio, ioflag, cred));
}
-ftruncate()
+/*
+ * Write wrapper for fifo's.
+ */
+ufsfifo_write(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
{
- struct a {
- int fd;
- int length;
- } *uap = (struct a *)u.u_ap;
- struct inode *ip;
- struct file *fp;
- fp = getf(uap->fd);
- if (fp == NULL)
- return;
- if (fp->f_type == DTYPE_SOCKET) {
- u.u_error = EINVAL;
- return;
- }
- if ((fp->f_flag&FWRITE) == 0) {
- u.u_error = EINVAL;
- return;
- }
- ip = fp->f_inode;
- ilock(ip);
- itrunc(ip, uap->length);
+ /*
+ * Set update and change flags.
+ */
+ VTOI(vp)->i_flag |= IUPD|ICHG;
+ return (fifo_write(vp, uio, ioflag, cred));
}
-rename()
+/*
+ * Close wrapper for fifo's.
+ *
+ * Update the times on the inode then do device close.
+ */
+ufsfifo_close(vp, fflag, cred)
+ struct vnode *vp;
+ int fflag;
+ struct ucred *cred;
{
-#ifdef notdef
- struct a {
- char *from;
- char *to;
- } *uap;
-#endif
+ register struct inode *ip = VTOI(vp);
+ if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED))
+ ITIMES(ip, &time, &time);
+ return (fifo_close(vp, fflag, cred));
}
+#endif /* FIFO */
/*
* Make a new file.
*/
-struct inode *
-maknode(mode)
+maknode(mode, ndp, ipp)
int mode;
+ register struct nameidata *ndp;
+ struct inode **ipp;
{
register struct inode *ip;
+ struct inode *tip;
+ register struct inode *pdir = VTOI(ndp->ni_dvp);
ino_t ipref;
+ int error;
+ *ipp = 0;
if ((mode & IFMT) == IFDIR)
- ipref = dirpref(u.u_pdir->i_fs);
+ ipref = dirpref(pdir->i_fs);
else
- ipref = u.u_pdir->i_number;
- ip = ialloc(u.u_pdir, ipref, mode);
- if (ip == NULL) {
- iput(u.u_pdir);
- return (NULL);
+ ipref = pdir->i_number;
+ error = ialloc(pdir, ipref, mode, &tip);
+ if (error) {
+ iput(pdir);
+ return (error);
}
+ ip = tip;
#ifdef QUOTA
if (ip->i_dquot != NODQUOT)
panic("maknode: dquot");
ip->i_flag |= IACC|IUPD|ICHG;
if ((mode & IFMT) == 0)
mode |= IFREG;
- ip->i_mode = mode & ~u.u_cmask;
+ ip->i_mode = mode;
+ ITOV(ip)->v_type = IFTOVT(mode); /* Rest init'd in iget() */
ip->i_nlink = 1;
- ip->i_uid = u.u_uid;
- ip->i_gid = u.u_pdir->i_gid;
+ ip->i_uid = ndp->ni_cred->cr_uid;
+ ip->i_gid = pdir->i_gid;
+ if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, ndp->ni_cred) &&
+ suser(ndp->ni_cred, NULL))
+ ip->i_mode &= ~ISGID;
#ifdef QUOTA
ip->i_dquot = inoquota(ip);
#endif
/*
* Make sure inode goes to disk before directory entry.
*/
- iupdat(ip, &time.tv_sec, &time.tv_sec, 1);
- direnter(ip);
- if (u.u_error) {
+ if ((error = iupdat(ip, &time, &time, 1)) ||
+ (error = direnter(ip, ndp))) {
/*
- * write error occurred trying to update directory
- * so must deallocate the inode
+ * Write error occurred trying to update the inode
+ * or the directory so must deallocate the inode.
*/
ip->i_nlink = 0;
ip->i_flag |= ICHG;
iput(ip);
- return (NULL);
+ return (error);
}
- return (ip);
+ *ipp = ip;
+ return (0);
}