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Lookup up the directory entry for the tmpfs node that are deleted by

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both node pointer and name component. This does the right thing for
hardlinks to the same node in the same directory.

Submitted by:	Yoshihiro Ota <ota j email ne jp>
PR:	kern/131356
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2009-02-08 19:18:33 +00:00
parent aba831de03
commit e3c7e75305
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=188318
3 changed files with 10 additions and 22 deletions
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3
sys/fs/tmpfs/tmpfs.h
View file

@ -408,9 +408,8 @@ int tmpfs_alloc_file(struct vnode *, struct vnode **, struct vattr *,
void tmpfs_dir_attach(struct vnode *, struct tmpfs_dirent *);
void tmpfs_dir_detach(struct vnode *, struct tmpfs_dirent *);
struct tmpfs_dirent * tmpfs_dir_lookup(struct tmpfs_node *node,
struct tmpfs_node *f,
struct componentname *cnp);
struct tmpfs_dirent *tmpfs_dir_search(struct tmpfs_node *node,
struct tmpfs_node *f);
int tmpfs_dir_getdotdent(struct tmpfs_node *, struct uio *);
int tmpfs_dir_getdotdotdent(struct tmpfs_node *, struct uio *);
struct tmpfs_dirent * tmpfs_dir_lookupbycookie(struct tmpfs_node *, off_t);

19
sys/fs/tmpfs/tmpfs_subr.c
View file

@ -571,7 +571,8 @@ tmpfs_dir_detach(struct vnode *vp, struct tmpfs_dirent *de)
* Returns a pointer to the entry when found, otherwise NULL.
*/
struct tmpfs_dirent *
tmpfs_dir_lookup(struct tmpfs_node *node, struct componentname *cnp)
tmpfs_dir_lookup(struct tmpfs_node *node, struct tmpfs_node *f,
struct componentname *cnp)
{
boolean_t found;
struct tmpfs_dirent *de;
@ -583,6 +584,8 @@ tmpfs_dir_lookup(struct tmpfs_node *node, struct componentname *cnp)
found = 0;
TAILQ_FOREACH(de, &node->tn_dir.tn_dirhead, td_entries) {
if (f != NULL && de->td_node != f)
continue;
MPASS(cnp->cn_namelen < 0xffff);
if (de->td_namelen == (uint16_t)cnp->cn_namelen &&
bcmp(de->td_name, cnp->cn_nameptr, de->td_namelen) == 0) {
@ -595,20 +598,6 @@ tmpfs_dir_lookup(struct tmpfs_node *node, struct componentname *cnp)
return found ? de : NULL;
}
struct tmpfs_dirent *
tmpfs_dir_search(struct tmpfs_node *node, struct tmpfs_node *f)
{
struct tmpfs_dirent *de;
TMPFS_VALIDATE_DIR(node);
node->tn_status |= TMPFS_NODE_ACCESSED;
TAILQ_FOREACH(de, &node->tn_dir.tn_dirhead, td_entries) {
if (de->td_node == f)
return (de);
}
return (NULL);
}
/* --------------------------------------------------------------------- */
/*

10
sys/fs/tmpfs/tmpfs_vnops.c
View file

@ -104,7 +104,7 @@ tmpfs_lookup(struct vop_cachedlookup_args *v)
*vpp = dvp;
error = 0;
} else {
de = tmpfs_dir_lookup(dnode, cnp);
de = tmpfs_dir_lookup(dnode, NULL, cnp);
if (de == NULL) {
/* The entry was not found in the directory.
* This is OK if we are creating or renaming an
@ -772,7 +772,7 @@ tmpfs_remove(struct vop_remove_args *v)
dnode = VP_TO_TMPFS_DIR(dvp);
node = VP_TO_TMPFS_NODE(vp);
tmp = VFS_TO_TMPFS(vp->v_mount);
de = tmpfs_dir_search(dnode, node);
de = tmpfs_dir_lookup(dnode, node, v->a_cnp);
MPASS(de != NULL);
/* Files marked as immutable or append-only cannot be deleted. */
@ -919,7 +919,7 @@ tmpfs_rename(struct vop_rename_args *v)
}
fdnode = VP_TO_TMPFS_DIR(fdvp);
fnode = VP_TO_TMPFS_NODE(fvp);
de = tmpfs_dir_search(fdnode, fnode);
de = tmpfs_dir_lookup(fdnode, fnode, fcnp);
/* Avoid manipulating '.' and '..' entries. */
if (de == NULL) {
@ -1031,7 +1031,7 @@ tmpfs_rename(struct vop_rename_args *v)
* from the target directory. */
if (tvp != NULL) {
/* Remove the old entry from the target directory. */
de = tmpfs_dir_search(tdnode, tnode);
de = tmpfs_dir_lookup(tdnode, tnode, tcnp);
tmpfs_dir_detach(tdvp, de);
/* Free the directory entry we just deleted. Note that the
@ -1119,7 +1119,7 @@ tmpfs_rmdir(struct vop_rmdir_args *v)
/* Get the directory entry associated with node (vp). This was
* filled by tmpfs_lookup while looking up the entry. */
de = tmpfs_dir_search(dnode, node);
de = tmpfs_dir_lookup(dnode, node, v->a_cnp);
MPASS(TMPFS_DIRENT_MATCHES(de,
v->a_cnp->cn_nameptr,
v->a_cnp->cn_namelen));