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fs: fix some nlinks handling

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Matheus
2025-10-23 15:04:25 -03:00
parent d8c377f0d8
commit 0957ff6e71
3 changed files with 43 additions and 18 deletions
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kernel-src/fs/tmpfs.c
+29 -4
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@@ -117,7 +117,7 @@ static int tmpfs_create(vnode_t *parent, char *name, vattr_t *attr, int type, vn
tmpattr.size = 0;
tmpattr.type = type;
int error = tmpfs_setattr(node, &tmpattr, V_ATTR_ALL, cred);
tmpnode->attr.nlinks = 1;
tmpnode->attr.nlinks = type == V_TYPE_DIR ? 2 : 1;
if (error) {
VOP_RELEASE(node);
@@ -141,8 +141,10 @@ static int tmpfs_create(vnode_t *parent, char *name, vattr_t *attr, int type, vn
}
// hold the .. reference (done here to reduce cleanup)
if (type == V_TYPE_DIR)
if (type == V_TYPE_DIR) {
parenttmpnode->attr.nlinks += 1;
VOP_HOLD(parent);
}
node->vfs = parent->vfs;
*result = node;
@@ -286,6 +288,13 @@ static int tmpfs_unlink(vnode_t *node, vnode_t *child, char *name, cred_t *cred)
return err;
--unlinktmpnode->attr.nlinks;
if (child->type == V_TYPE_DIR) {
// undo .. entry link
VOP_RELEASE(node);
--tmpnode->attr.nlinks;
}
VOP_RELEASE(unlinknode);
return 0;
@@ -375,8 +384,22 @@ static int tmpfs_rename(vnode_t *source, vnode_t *sourcefile, char *oldname, vno
// remove old link. should not fail
__assert(hashtable_remove(&sourcedir->children, oldname, oldlen) == 0);
if (oldnode)
if (sourcefile->type == V_TYPE_DIR && targetdir != sourcedir) {
tmpfsnode_t *v = (tmpfsnode_t *)sourcefile;
// handle .. entry
__assert(hashtable_set(&v->children, targetdir, "..", 3, false) == 0);
sourcedir->attr.nlinks -= 1;
targetdir->attr.nlinks += 1;
VOP_RELEASE(source);
VOP_HOLD(target);
}
if (oldnode) {
tmpfsnode_t *old_tmpnode = (tmpfsnode_t *)oldnode;
--old_tmpnode->attr.nlinks;
VOP_RELEASE(oldnode);
}
cleanup:
return error;
@@ -469,10 +492,12 @@ static int tmpfs_getdents(vnode_t *node, dent_t *buffer, size_t count, uintmax_t
}
static int tmpfs_inactive(vnode_t *node) {
tmpfsnode_t *tmp_node = (tmpfsnode_t *)node;
__assert(tmp_node->attr.nlinks == (node->type == V_TYPE_DIR ? 1 : 0));
if (node->type == V_TYPE_REGULAR) {
vmmcache_truncate(node, 0);
}
freenode((tmpfsnode_t *)node);
freenode(tmp_node);
return 0;
}