*
* %sccs.include.redist.c%
*
- * @(#)ufs_lookup.c 7.44 (Berkeley) %G%
+ * @(#)ufs_lookup.c 7.52 (Berkeley) %G%
*/
#include <sys/param.h>
int dirchk = 0;
#endif
+#define FSFMT(vp) ((vp)->v_mount->mnt_maxsymlinklen <= 0)
+
/*
* Convert a component of a pathname into a pointer to a locked inode.
* This is a very central and rather complicated routine.
* exists, lookup returns both the target and its parent directory locked.
* When creating or renaming and LOCKPARENT is specified, the target may
* not be ".". When deleting and LOCKPARENT is specified, the target may
- * be "."., but the caller must check to ensure it does an vrele and iput
- * instead of two iputs.
+ * be "."., but the caller must check to ensure it does an vrele and vput
+ * instead of two vputs.
*
* Overall outline of ufs_lookup:
*
* NOTE: (LOOKUP | LOCKPARENT) currently returns the parent inode unlocked.
*/
int
-ufs_lookup(dvp, vpp, cnp)
- struct vnode *dvp;
- struct vnode **vpp;
- struct componentname *cnp;
+ufs_lookup(ap)
+ struct vop_lookup_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ } */ *ap;
{
- register struct inode *dp; /* the directory we are searching */
+ register struct vnode *vdp; /* vnode for directory being searched */
+ register struct inode *dp; /* inode for directory being searched */
struct buf *bp; /* a buffer of directory entries */
register struct direct *ep; /* the current directory entry */
int entryoffsetinblock; /* offset of ep in bp's buffer */
int numdirpasses; /* strategy for directory search */
doff_t endsearch; /* offset to end directory search */
doff_t prevoff; /* prev entry dp->i_offset */
- struct inode *pdp; /* saved dp during symlink work */
- struct vnode *tdp; /* returned by VOP_VGET */
+ struct vnode *pdp; /* saved dp during symlink work */
+ struct vnode *tdp; /* returned by VFS_VGET */
doff_t enduseful; /* pointer past last used dir slot */
u_long bmask; /* block offset mask */
int lockparent; /* 1 => lockparent flag is set */
int wantparent; /* 1 => wantparent or lockparent flag */
- int error;
- struct vnode *vdp = dvp; /* saved for one special case */
+ int namlen, error;
+ struct vnode **vpp = ap->a_vpp;
+ struct componentname *cnp = ap->a_cnp;
+ struct ucred *cred = cnp->cn_cred;
+ int flags = cnp->cn_flags;
+ int nameiop = cnp->cn_nameiop;
bp = NULL;
slotoffset = -1;
*vpp = NULL;
- dp = VTOI(dvp);
- lockparent = cnp->cn_flags & LOCKPARENT;
- wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT);
+ vdp = ap->a_dvp;
+ dp = VTOI(vdp);
+ lockparent = flags & LOCKPARENT;
+ wantparent = flags & (LOCKPARENT|WANTPARENT);
/*
* Check accessiblity of directory.
*/
if ((dp->i_mode & IFMT) != IFDIR)
return (ENOTDIR);
- if (error = ufs_access(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc))
+ if (error = VOP_ACCESS(vdp, VEXEC, cred, cnp->cn_proc))
return (error);
/*
* check the name cache to see if the directory/name pair
* we are looking for is known already.
*/
- if (error = cache_lookup(dvp, vpp, cnp)) {
+ if (error = cache_lookup(vdp, vpp, cnp)) {
int vpid; /* capability number of vnode */
if (error == ENOENT)
return (error);
-#ifdef PARANOID
- if (dvp == ndp->ni_rdir && (cnp->cn_flags & ISDOTDOT))
- panic("ufs_lookup: .. through root");
-#endif
/*
* Get the next vnode in the path.
* See comment below starting `Step through' for
* an explaination of the locking protocol.
*/
- /*
- * The borrowing of variables
- * here is somewhat confusing. Usually, dvp/dp
- * is the directory being searched.
- * Here it's the target returned from the cache.
- */
- pdp = dp;
+ pdp = vdp;
dp = VTOI(*vpp);
- dvp = *vpp;
- vpid = dvp->v_id;
- if (pdp == dp) { /* lookup on "." */
- VREF(dvp);
+ vdp = *vpp;
+ vpid = vdp->v_id;
+ if (pdp == vdp) { /* lookup on "." */
+ VREF(vdp);
error = 0;
- } else if (cnp->cn_flags & ISDOTDOT) {
- IUNLOCK(pdp);
- error = vget(dvp);
- if (!error && lockparent && (cnp->cn_flags & ISLASTCN))
- ILOCK(pdp);
+ } else if (flags & ISDOTDOT) {
+ VOP_UNLOCK(pdp);
+ error = vget(vdp);
+ if (!error && lockparent && (flags & ISLASTCN))
+ error = VOP_LOCK(pdp);
} else {
- error = vget(dvp);
- if (!lockparent || error || !(cnp->cn_flags & ISLASTCN))
- IUNLOCK(pdp);
+ error = vget(vdp);
+ if (!lockparent || error || !(flags & ISLASTCN))
+ VOP_UNLOCK(pdp);
}
/*
* Check that the capability number did not change
* while we were waiting for the lock.
*/
if (!error) {
- if (vpid == dvp->v_id)
+ if (vpid == vdp->v_id)
return (0);
- ufs_iput(dp);
- if (lockparent && pdp != dp &&
- (cnp->cn_flags & ISLASTCN))
- IUNLOCK(pdp);
+ vput(vdp);
+ if (lockparent && pdp != vdp && (flags & ISLASTCN))
+ VOP_UNLOCK(pdp);
}
- ILOCK(pdp);
- dp = pdp;
- dvp = ITOV(dp);
+ if (error = VOP_LOCK(pdp))
+ return (error);
+ vdp = pdp;
+ dp = VTOI(pdp);
*vpp = NULL;
}
*/
slotstatus = FOUND;
slotfreespace = slotsize = slotneeded = 0;
- if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
- (cnp->cn_flags & ISLASTCN)) {
+ if ((nameiop == CREATE || nameiop == RENAME) &&
+ (flags & ISLASTCN)) {
slotstatus = NONE;
slotneeded = (sizeof(struct direct) - MAXNAMLEN +
cnp->cn_namelen + 3) &~ 3;
* profiling time and hence has been removed in the interest
* of simplicity.
*/
- bmask = VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_iosize - 1;
- if (cnp->cn_nameiop != LOOKUP || dp->i_diroff == 0 ||
+ bmask = VFSTOUFS(vdp->v_mount)->um_mountp->mnt_stat.f_iosize - 1;
+ if (nameiop != LOOKUP || dp->i_diroff == 0 ||
dp->i_diroff > dp->i_size) {
entryoffsetinblock = 0;
dp->i_offset = 0;
} else {
dp->i_offset = dp->i_diroff;
if ((entryoffsetinblock = dp->i_offset & bmask) &&
- (error = VOP_BLKATOFF(dvp, (off_t)dp->i_offset, NULL, &bp)))
+ (error = VOP_BLKATOFF(vdp, (off_t)dp->i_offset, NULL, &bp)))
return (error);
numdirpasses = 2;
nchstats.ncs_2passes++;
if (bp != NULL)
brelse(bp);
if (error =
- VOP_BLKATOFF(dvp, (off_t)dp->i_offset, NULL, &bp))
+ VOP_BLKATOFF(vdp, (off_t)dp->i_offset, NULL, &bp))
return (error);
entryoffsetinblock = 0;
}
*/
ep = (struct direct *)(bp->b_un.b_addr + entryoffsetinblock);
if (ep->d_reclen == 0 ||
- dirchk && ufs_dirbadentry(ep, entryoffsetinblock)) {
+ dirchk && ufs_dirbadentry(vdp, ep, entryoffsetinblock)) {
int i;
ufs_dirbad(dp, dp->i_offset, "mangled entry");
int size = ep->d_reclen;
if (ep->d_ino != 0)
- size -= DIRSIZ(ep);
+ size -= DIRSIZ(FSFMT(vdp), ep);
if (size > 0) {
if (size >= slotneeded) {
slotstatus = FOUND;
* Check for a name match.
*/
if (ep->d_ino) {
- if (ep->d_namlen == cnp->cn_namelen &&
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ if (vdp->v_mount->mnt_maxsymlinklen > 0)
+ namlen = ep->d_namlen;
+ else
+ namlen = ep->d_type;
+# else
+ namlen = ep->d_namlen;
+# endif
+ if (namlen == cnp->cn_namelen &&
!bcmp(cnp->cn_nameptr, ep->d_name,
- (unsigned)ep->d_namlen)) {
+ (unsigned)namlen)) {
/*
* Save directory entry's inode number and
* reclen in ndp->ni_ufs area, and release
* directory has not been removed, then can consider
* allowing file to be created.
*/
- if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
- (cnp->cn_flags & ISLASTCN) && dp->i_nlink != 0) {
+ if ((nameiop == CREATE || nameiop == RENAME) &&
+ (flags & ISLASTCN) && dp->i_nlink != 0) {
/*
* Access for write is interpreted as allowing
* creation of files in the directory.
*/
- if (error = ufs_access(dvp, VWRITE, cnp->cn_cred, cnp->cn_proc))
+ if (error = VOP_ACCESS(vdp, VWRITE, cred, cnp->cn_proc))
return (error);
/*
* Return an indication of where the new directory
*/
cnp->cn_flags |= SAVENAME;
if (!lockparent)
- IUNLOCK(dp);
+ VOP_UNLOCK(vdp);
return (EJUSTRETURN);
}
/*
* Insert name into cache (as non-existent) if appropriate.
*/
- if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE)
- cache_enter(dvp, *vpp, cnp);
+ if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE)
+ cache_enter(vdp, *vpp, cnp);
return (ENOENT);
found:
* Check that directory length properly reflects presence
* of this entry.
*/
- if (entryoffsetinblock + DIRSIZ(ep) > dp->i_size) {
+ if (entryoffsetinblock + DIRSIZ(FSFMT(vdp), ep) > dp->i_size) {
ufs_dirbad(dp, dp->i_offset, "i_size too small");
- dp->i_size = entryoffsetinblock + DIRSIZ(ep);
+ dp->i_size = entryoffsetinblock + DIRSIZ(FSFMT(vdp), ep);
dp->i_flag |= IUPD|ICHG;
}
* If the final component of path name, save information
* in the cache as to where the entry was found.
*/
- if ((cnp->cn_flags & ISLASTCN) && cnp->cn_nameiop == LOOKUP)
+ if ((flags & ISLASTCN) && nameiop == LOOKUP)
dp->i_diroff = dp->i_offset &~ (DIRBLKSIZ - 1);
/*
* the directory (in ndp->ni_dvp), otherwise we go
* on and lock the inode, being careful with ".".
*/
- if (cnp->cn_nameiop == DELETE && (cnp->cn_flags & ISLASTCN)) {
+ if (nameiop == DELETE && (flags & ISLASTCN)) {
/*
* Write access to directory required to delete files.
*/
- if (error = ufs_access(dvp, VWRITE, cnp->cn_cred, cnp->cn_proc))
+ if (error = VOP_ACCESS(vdp, VWRITE, cred, cnp->cn_proc))
return (error);
/*
* Return pointer to current entry in dp->i_offset,
*vpp = vdp;
return (0);
}
- if (error = VOP_VGET(dvp, dp->i_ino, &tdp))
+ if (error = VFS_VGET(vdp->v_mount, dp->i_ino, &tdp))
return (error);
/*
* If directory is "sticky", then user must own
* implements append-only directories.
*/
if ((dp->i_mode & ISVTX) &&
- cnp->cn_cred->cr_uid != 0 &&
- cnp->cn_cred->cr_uid != dp->i_uid &&
- VTOI(tdp)->i_uid != cnp->cn_cred->cr_uid) {
+ cred->cr_uid != 0 &&
+ cred->cr_uid != dp->i_uid &&
+ VTOI(tdp)->i_uid != cred->cr_uid) {
vput(tdp);
return (EPERM);
}
*vpp = tdp;
if (!lockparent)
- IUNLOCK(dp);
+ VOP_UNLOCK(vdp);
return (0);
}
* Must get inode of directory entry to verify it's a
* regular file, or empty directory.
*/
- if (cnp->cn_nameiop == RENAME && wantparent &&
- (cnp->cn_flags & ISLASTCN)) {
- if (error = ufs_access(dvp, VWRITE, cnp->cn_cred, cnp->cn_proc))
+ if (nameiop == RENAME && wantparent &&
+ (flags & ISLASTCN)) {
+ if (error = VOP_ACCESS(vdp, VWRITE, cred, cnp->cn_proc))
return (error);
/*
* Careful about locking second inode.
*/
if (dp->i_number == dp->i_ino)
return (EISDIR);
- if (error = VOP_VGET(dvp, dp->i_ino, &tdp))
+ if (error = VFS_VGET(vdp->v_mount, dp->i_ino, &tdp))
return (error);
*vpp = tdp;
cnp->cn_flags |= SAVENAME;
if (!lockparent)
- IUNLOCK(dp);
+ VOP_UNLOCK(vdp);
return (0);
}
/*
- * Step through the translation in the name. We do not `iput' the
+ * Step through the translation in the name. We do not `vput' the
* directory because we may need it again if a symbolic link
* is relative to the current directory. Instead we save it
* unlocked as "pdp". We must get the target inode before unlocking
* work if the file system has any hard links other than ".."
* that point backwards in the directory structure.
*/
- pdp = dp;
- if (cnp->cn_flags & ISDOTDOT) {
- IUNLOCK(pdp); /* race to get the inode */
- if (error = VOP_VGET(dvp, dp->i_ino, &tdp)) {
- ILOCK(pdp);
+ pdp = vdp;
+ if (flags & ISDOTDOT) {
+ VOP_UNLOCK(pdp); /* race to get the inode */
+ if (error = VFS_VGET(vdp->v_mount, dp->i_ino, &tdp)) {
+ VOP_LOCK(pdp);
+ return (error);
+ }
+ if (lockparent && (flags & ISLASTCN) &&
+ (error = VOP_LOCK(pdp))) {
+ vput(tdp);
return (error);
}
- if (lockparent && (cnp->cn_flags & ISLASTCN))
- ILOCK(pdp);
*vpp = tdp;
} else if (dp->i_number == dp->i_ino) {
- VREF(dvp); /* we want ourself, ie "." */
- *vpp = dvp;
+ VREF(vdp); /* we want ourself, ie "." */
+ *vpp = vdp;
} else {
- if (error = VOP_VGET(dvp, dp->i_ino, &tdp))
+ if (error = VFS_VGET(vdp->v_mount, dp->i_ino, &tdp))
return (error);
- if (!lockparent || !(cnp->cn_flags & ISLASTCN))
- IUNLOCK(pdp);
+ if (!lockparent || !(flags & ISLASTCN))
+ VOP_UNLOCK(pdp);
*vpp = tdp;
}
* Insert name into cache if appropriate.
*/
if (cnp->cn_flags & MAKEENTRY)
- cache_enter(dvp, *vpp, cnp);
+ cache_enter(vdp, *vpp, cnp);
return (0);
}
* name must be as long as advertised, and null terminated
*/
int
-ufs_dirbadentry(ep, entryoffsetinblock)
+ufs_dirbadentry(dp, ep, entryoffsetinblock)
+ struct vnode *dp;
register struct direct *ep;
int entryoffsetinblock;
{
register int i;
+ int namlen;
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ if (dp->v_mount->mnt_maxsymlinklen > 0)
+ namlen = ep->d_namlen;
+ else
+ namlen = ep->d_type;
+# else
+ namlen = ep->d_namlen;
+# endif
if ((ep->d_reclen & 0x3) != 0 ||
ep->d_reclen > DIRBLKSIZ - (entryoffsetinblock & (DIRBLKSIZ - 1)) ||
- ep->d_reclen < DIRSIZ(ep) || ep->d_namlen > MAXNAMLEN) {
+ ep->d_reclen < DIRSIZ(FSFMT(dp), ep) || namlen > MAXNAMLEN) {
/*return (1); */
printf("First bad\n");
goto bad;
}
- for (i = 0; i < ep->d_namlen; i++)
+ for (i = 0; i < namlen; i++)
if (ep->d_name[i] == '\0') {
/*return (1); */
printf("Second bad\n");
newdir.d_ino = ip->i_number;
newdir.d_namlen = cnp->cn_namelen;
bcopy(cnp->cn_nameptr, newdir.d_name, (unsigned)cnp->cn_namelen + 1);
- newentrysize = DIRSIZ(&newdir);
+ if (dvp->v_mount->mnt_maxsymlinklen > 0)
+ newdir.d_type = IFTODT(ip->i_mode);
+ else {
+ newdir.d_type = 0;
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ { u_char tmp = newdir.d_namlen;
+ newdir.d_namlen = newdir.d_type;
+ newdir.d_type = tmp; }
+# endif
+ }
+ newentrysize = DIRSIZ(FSFMT(dvp), &newdir);
if (dp->i_count == 0) {
/*
* If dp->i_count is 0, then namei could find no
* space.
*/
ep = (struct direct *)dirbuf;
- dsize = DIRSIZ(ep);
+ dsize = DIRSIZ(FSFMT(dvp), ep);
spacefree = ep->d_reclen - dsize;
for (loc = ep->d_reclen; loc < dp->i_count; ) {
nep = (struct direct *)(dirbuf + loc);
/* overwrite; nothing there; header is ours */
spacefree += dsize;
}
- dsize = DIRSIZ(nep);
+ dsize = DIRSIZ(FSFMT(dvp), nep);
spacefree += nep->d_reclen - dsize;
loc += nep->d_reclen;
bcopy((caddr_t)nep, (caddr_t)ep, dsize);
error = VOP_BWRITE(bp);
dp->i_flag |= IUPD|ICHG;
if (!error && dp->i_endoff && dp->i_endoff < dp->i_size)
- error = VOP_TRUNCATE(dvp, (off_t)dp->i_endoff, IO_SYNC, NOCRED);
+ error = VOP_TRUNCATE(dvp, (off_t)dp->i_endoff, IO_SYNC,
+ cnp->cn_cred, cnp->cn_proc);
return (error);
}
{
struct buf *bp;
struct direct *ep;
+ struct vnode *vdp = ITOV(dp);
int error;
- if (error =
- VOP_BLKATOFF(ITOV(dp), (off_t)dp->i_offset, (char **)&ep, &bp))
+ if (error = VOP_BLKATOFF(vdp, (off_t)dp->i_offset, (char **)&ep, &bp))
return (error);
ep->d_ino = ip->i_number;
+ if (vdp->v_mount->mnt_maxsymlinklen > 0)
+ ep->d_type = IFTODT(ip->i_mode);
error = VOP_BWRITE(bp);
dp->i_flag |= IUPD|ICHG;
return (error);
register off_t off;
struct dirtemplate dbuf;
register struct direct *dp = (struct direct *)&dbuf;
- int error, count;
+ int error, count, namlen;
#define MINDIRSIZ (sizeof (struct dirtemplate) / 2)
for (off = 0; off < ip->i_size; off += dp->d_reclen) {
if (dp->d_ino == 0)
continue;
/* accept only "." and ".." */
- if (dp->d_namlen > 2)
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ if (ITOV(ip)->v_mount->mnt_maxsymlinklen > 0)
+ namlen = dp->d_namlen;
+ else
+ namlen = dp->d_type;
+# else
+ namlen = dp->d_namlen;
+# endif
+ if (namlen > 2)
return (0);
if (dp->d_name[0] != '.')
return (0);
/*
- * At this point d_namlen must be 1 or 2.
+ * At this point namlen must be 1 or 2.
* 1 implies ".", 2 implies ".." if second
* char is also "."
*/
- if (dp->d_namlen == 1)
+ if (namlen == 1)
continue;
if (dp->d_name[1] == '.' && dp->d_ino == parentino)
continue;
/*
* Check if source directory is in the path of the target directory.
* Target is supplied locked, source is unlocked.
- * The target is always iput before returning.
+ * The target is always vput before returning.
*/
int
ufs_checkpath(source, target, cred)
struct inode *source, *target;
struct ucred *cred;
{
- struct dirtemplate dirbuf;
- register struct inode *ip;
struct vnode *vp;
- int error, rootino;
+ int error, rootino, namlen;
+ struct dirtemplate dirbuf;
- ip = target;
- if (ip->i_number == source->i_number) {
+ vp = ITOV(target);
+ if (target->i_number == source->i_number) {
error = EEXIST;
goto out;
}
rootino = ROOTINO;
error = 0;
- if (ip->i_number == rootino)
+ if (target->i_number == rootino)
goto out;
for (;;) {
- if ((ip->i_mode & IFMT) != IFDIR) {
+ if (vp->v_type != VDIR) {
error = ENOTDIR;
break;
}
- vp = ITOV(ip);
error = vn_rdwr(UIO_READ, vp, (caddr_t)&dirbuf,
sizeof (struct dirtemplate), (off_t)0, UIO_SYSSPACE,
IO_NODELOCKED, cred, (int *)0, (struct proc *)0);
if (error != 0)
break;
- if (dirbuf.dotdot_namlen != 2 ||
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ if (vp->v_mount->mnt_maxsymlinklen > 0)
+ namlen = dirbuf.dotdot_namlen;
+ else
+ namlen = dirbuf.dotdot_type;
+# else
+ namlen = dirbuf.dotdot_namlen;
+# endif
+ if (namlen != 2 ||
dirbuf.dotdot_name[0] != '.' ||
dirbuf.dotdot_name[1] != '.') {
error = ENOTDIR;
}
if (dirbuf.dotdot_ino == rootino)
break;
- ufs_iput(ip);
- if (error = VOP_VGET(vp, dirbuf.dotdot_ino, &vp))
+ vput(vp);
+ if (error = VFS_VGET(vp->v_mount, dirbuf.dotdot_ino, &vp)) {
+ vp = NULL;
break;
- ip = VTOI(vp);
+ }
}
out:
if (error == ENOTDIR)
printf("checkpath: .. not a directory\n");
- if (ip != NULL)
- ufs_iput(ip);
+ if (vp != NULL)
+ vput(vp);
return (error);
}