diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index 45e9a1f9b0..494ee00c66 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -84,6 +84,23 @@ static void unlinkat_preserve_errno(int dirfd, const char *path, int flags)
#define VIRTFS_META_DIR ".virtfs_metadata"
+static int is_in_store_path(const char *path)
+{
+ static char *store_path = NULL;
+ int store_path_len = -1;
+
+ if (store_path_len == -1) {
+ if ((store_path = getenv("NIX_STORE")) != NULL)
+ store_path_len = strlen(store_path);
+ else
+ store_path_len = 0;
+ }
+
+ if (store_path_len > 0)
+ return strncmp(path, store_path, strlen(store_path)) == 0;
+ return 0;
+}
+
static FILE *local_fopenat(int dirfd, const char *name, const char *mode)
{
int fd, o_mode = 0;
@@ -161,6 +178,8 @@ static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
if (err) {
goto err_out;
}
+ stbuf->st_uid = 0;
+ stbuf->st_gid = 0;
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
/* Actual credentials are part of extended attrs */
uid_t tmp_uid;
@@ -280,6 +299,9 @@ static int fchmodat_nofollow(int dirfd, const char *name, mode_t mode)
{
int fd, ret;
+ if (is_in_store_path(name))
+ return 0;
+
/* FIXME: this should be handled with fchmodat(AT_SYMLINK_NOFOLLOW).
* Unfortunately, the linux kernel doesn't implement it yet. As an
* alternative, let's open the file and use fchmod() instead. This
@@ -661,6 +683,8 @@ static int local_fstat(FsContext *fs_ctx, int fid_type,
if (err) {
return err;
}
+ stbuf->st_uid = 0;
+ stbuf->st_gid = 0;
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
/* Actual credentials are part of extended attrs */
uid_t tmp_uid;
@@ -795,8 +819,11 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
if (err) {
goto out;
}
- err = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid,
- AT_SYMLINK_NOFOLLOW);
+ if (is_in_store_path(name))
+ err = 0;
+ else
+ err = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid,
+ AT_SYMLINK_NOFOLLOW);
if (err == -1) {
/*
* If we fail to change ownership and if we are
@@ -911,7 +938,9 @@ static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
goto out;
}
- if ((credp->fc_uid == -1 && credp->fc_gid == -1) ||
+ if (is_in_store_path(name)) {
+ ret = 0;
+ } else if ((credp->fc_uid == -1 && credp->fc_gid == -1) ||
(fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
ret = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid,