Differential D31366 Diff 93057 sys/fs/msdosfs/msdosfs_vnops.c

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sys/fs/msdosfs/msdosfs_vnops.c

Show First 20 Lines • Show All 1,001 Lines • ▼ Show 20 Lines	abortit:
*/		*/
if (ip->de_Attributes & ATTR_DIRECTORY) {		if (ip->de_Attributes & ATTR_DIRECTORY) {
/*		/*
* Avoid ".", "..", and aliases of "." for obvious reasons.		* Avoid ".", "..", and aliases of "." for obvious reasons.
*/		*/
if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') \|\|		if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') \|\|
dp == ip \|\|		dp == ip \|\|
(fcnp->cn_flags & ISDOTDOT) \|\|		(fcnp->cn_flags & ISDOTDOT) \|\|
(tcnp->cn_flags & ISDOTDOT) \|\|		(tcnp->cn_flags & ISDOTDOT)) {
(ip->de_flag & DE_RENAME)) {
VOP_UNLOCK(fvp);		VOP_UNLOCK(fvp);
error = EINVAL;		error = EINVAL;
goto abortit;		goto abortit;
}		}
ip->de_flag \|= DE_RENAME;
doingdirectory++;		doingdirectory++;
}		}

/*		/*
* When the target exists, both the directory		* When the target exists, both the directory
* and target vnodes are returned locked.		* and target vnodes are returned locked.
*/		*/
dp = VTODE(tdvp);		dp = VTODE(tdvp);
▲ Show 20 Lines • Show All 83 Lines • ▼ Show 20 Lines	abortit:
fcnp->cn_flags \|= LOCKPARENT \| LOCKLEAF;		fcnp->cn_flags \|= LOCKPARENT \| LOCKLEAF;
if ((fcnp->cn_flags & SAVESTART) == 0)		if ((fcnp->cn_flags & SAVESTART) == 0)
panic("msdosfs_rename: lost from startdir");		panic("msdosfs_rename: lost from startdir");
if (!newparent)		if (!newparent)
VOP_UNLOCK(tdvp);		VOP_UNLOCK(tdvp);
if (relookup(fdvp, &fvp, fcnp) == 0)		if (relookup(fdvp, &fvp, fcnp) == 0)
vrele(fdvp);		vrele(fdvp);
if (fvp == NULL) {		if (fvp == NULL) {
/*
* From name has disappeared.
*/
if (doingdirectory)
panic("rename: lost dir entry");
if (newparent)		if (newparent)
VOP_UNLOCK(tdvp);		VOP_UNLOCK(tdvp);
vrele(tdvp);		vrele(tdvp);
vrele(ap->a_fvp);		vrele(ap->a_fvp);
/*		/*
* fdvp may be locked and has a reference. We need to		* fdvp may be locked and has a reference. We need to
* release the lock and reference, unless to and from		* release the lock and reference, unless to and from
* directories are the same. In that case it is already		* directories are the same. In that case it is already
* unlocked.		* unlocked.
*/		*/
if (tdvp != fdvp)		if (tdvp != fdvp)
vput(fdvp);		vput(fdvp);
return 0;		return 0;
}		}
xp = VTODE(fvp);		xp = VTODE(fvp);
zp = VTODE(fdvp);		zp = VTODE(fdvp);
from_diroffset = zp->de_fndoffset;		from_diroffset = zp->de_fndoffset;

/*		/*
* Ensure that the directory entry still exists and has not		* Ensure that the directory entry still exists and has not
* changed till now. If the source is a file the entry may		* changed till now. If the source is a file the entry may
* have been unlinked or renamed. In either case there is		* have been unlinked or renamed. In either case there is
* no further work to be done. If the source is a directory		* no further work to be done.
* then it cannot have been rmdir'ed or renamed; this is
* prohibited by the DE_RENAME flag.
*/		*/
if (xp != ip) {		if (xp != ip) {
if (doingdirectory)
panic("rename: lost dir entry");
if (newparent)		if (newparent)
VOP_UNLOCK(fdvp);		VOP_UNLOCK(fdvp);
vrele(ap->a_fvp);		vrele(ap->a_fvp);
		ip = NULL;
xp = NULL;		xp = NULL;
} else {		} else {
vrele(fvp);		vrele(fvp);
xp = NULL;		xp = NULL;

/*		/*
* First write a new entry in the destination		* First write a new entry in the destination
* directory and mark the entry in the source directory		* directory and mark the entry in the source directory
▲ Show 20 Lines • Show All 54 Lines • ▼ Show 20 Lines	if (xp != ip) {
if (newparent)		if (newparent)
VOP_UNLOCK(fdvp);		VOP_UNLOCK(fdvp);
}		}

/*		/*
* If we moved a directory to a new parent directory, then we must		* If we moved a directory to a new parent directory, then we must
* fixup the ".." entry in the moved directory.		* fixup the ".." entry in the moved directory.
*/		*/
if (doingdirectory && newparent) {		if (ip != NULL && doingdirectory && newparent) {
cn = ip->de_StartCluster;		cn = ip->de_StartCluster;
if (cn == MSDOSFSROOT) {		if (cn == MSDOSFSROOT) {
/* this should never happen */		/* this should never happen */
panic("msdosfs_rename(): updating .. in root directory?");		panic("msdosfs_rename(): updating .. in root directory?");
} else		} else
bn = cntobn(pmp, cn);		bn = cntobn(pmp, cn);
error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster,		error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster,
NOCRED, &bp);		NOCRED, &bp);
Show All 27 Lines	abortit:
*/		*/
cache_purge(fvp);		cache_purge(fvp);
VOP_UNLOCK(fvp);		VOP_UNLOCK(fvp);
bad:		bad:
if (xp)		if (xp)
vput(tvp);		vput(tvp);
vput(tdvp);		vput(tdvp);
out:		out:
ip->de_flag &= ~DE_RENAME;
vrele(fdvp);		vrele(fdvp);
vrele(fvp);		vrele(fvp);
return (error);		return (error);

}		}

static struct {		static struct {
struct direntry dot;		struct direntry dot;
▲ Show 20 Lines • Show All 147 Lines • ▼ Show 20 Lines	msdosfs_rmdir(struct vop_rmdir_args *ap)
/*		/*
* Verify the directory is empty (and valid).		* Verify the directory is empty (and valid).
* (Rmdir ".." won't be valid since		* (Rmdir ".." won't be valid since
* ".." will contain a reference to		* ".." will contain a reference to
* the current directory and thus be		* the current directory and thus be
* non-empty.)		* non-empty.)
*/		*/
error = 0;		error = 0;
if (!dosdirempty(ip) \|\| ip->de_flag & DE_RENAME) {		if (!dosdirempty(ip)) {
error = ENOTEMPTY;		error = ENOTEMPTY;
goto out;		goto out;
}		}
/*		/*
* Delete the entry from the directory. For dos filesystems this		* Delete the entry from the directory. For dos filesystems this
* gets rid of the directory entry on disk, the in memory copy		* gets rid of the directory entry on disk, the in memory copy
* still exists but the de_refcnt is <= 0. This prevents it from		* still exists but the de_refcnt is <= 0. This prevents it from
* being found by deget(). When the vput() on dep is done we give		* being found by deget(). When the vput() on dep is done we give
▲ Show 20 Lines • Show All 535 Lines • Show Last 20 Lines