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fs: fix locking in rename for fatfs and ext2

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Matheus
2025-11-08 02:20:56 -03:00
parent ab90700203
commit 36bec0427a
2 changed files with 19 additions and 3 deletions
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kernel-src/fs/ext2.c
+7 -1
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@@ -1833,30 +1833,34 @@ static int ext2_rename(vnode_t *sourcedir, vnode_t *source, char *oldname, vnode
if (replaced_vnode) {
// we are replacing an existing link
// do some checks expected by posix
// TODO add these to fatfs and tmpfs
if (source->type != V_TYPE_DIR && replaced_vnode->type == V_TYPE_DIR) {
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
return EISDIR;
}
if (source->type == V_TYPE_DIR && replaced_vnode->type != V_TYPE_DIR) {
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
return ENOTDIR;
}
if (replaced_vnode->vfsmounted) {
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
return EBUSY;
}
err = replaced_vnode->type == V_TYPE_DIR ? is_directory_empty(ext2_replaced_node) : 0;
if (err) {
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
return err;
}
if (source == replaced_vnode) {
// POSIX says that if both are the same file, rename is a no-op
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
return 0;
}
@@ -1873,9 +1877,11 @@ static int ext2_rename(vnode_t *sourcedir, vnode_t *source, char *oldname, vnode
err = handleinodeunlink(fs, ext2targetdirnode, oldinode, ext2_replaced_node);
ext2sourcenode->inode.links += 1;
ASSERT_UNCLEAN(fs, writeinode(fs, &ext2sourcenode->inode, ext2sourcenode->id) == 0);
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
} else if (err) {
if (replaced_vnode) {
VOP_UNLOCK(replaced_vnode);
VOP_RELEASE(replaced_vnode);
}
}