···

       
1
       
 
       
diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c

     

       
2
       
-
       
index 845675e..43fa036 100644

     

       
3
       
 
       
--- a/hw/9pfs/9p-local.c

     

       
4
       
 
       
+++ b/hw/9pfs/9p-local.c

     

       
5
       
-
       
@@ -128,6 +128,8 @@ static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)

     

       
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0
       
 
       

     

       
6
       
 
       
     if (err) {

     

       
7
       
 
       
         goto err_out;

     

       
8
       
 
       
     }

     
···

       
11
       
 
       
     if (fs_ctx->export_flags & V9FS_SM_MAPPED) {

     

       
12
       
 
       
         /* Actual credentials are part of extended attrs */

     

       
13
       
 
       
         uid_t tmp_uid;

     

       
14
       
-
       
@@ -462,6 +464,16 @@ static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs,

     

       
15
       
 
       
     return ret;

     

       
16
       
 
       
 }

     

       
17
       
 
       
 

     

       
18
       
-
       
+static int maybe_chmod(const char *path, mode_t mode)

     

       
19
       
 
       
+{

     

       
20
       
-
       
+    static char *store_path = NULL;

     

       
21
       
-
       
+    if (store_path == NULL)

     

       
22
       
-
       
+        store_path = getenv("NIX_STORE");

     

       
23
       
-
       
+    if (strncmp(path, store_path, strlen(store_path)) != 0)

     

       
24
       
-
       
+        return chmod(path, mode);

     

       
25
       
-
       
+    return 0;

     

       
26
       
 
       
+}

     

       
27
       
 
       
+

     

       
28
       
 
       
 static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)

     

       
29
       
 
       
 {

     

       
30
       
 
       
     char *buffer;

     

       
31
       
-
       
@@ -477,7 +489,7 @@ static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)

     

       
32
       
 
       
     } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||

     

       
33
       
 
       
                (fs_ctx->export_flags & V9FS_SM_NONE)) {

     

       
34
       
 
       
         buffer = rpath(fs_ctx, path);

     
···

       
37
       
 
       
         g_free(buffer);

     

       
38
       
 
       
     }

     

       
39
       
 
       
     return ret;

     

       
40
       
-
       
@@ -621,6 +633,8 @@ static int local_fstat(FsContext *fs_ctx, int fid_type,

     

       
41
       
 
       
     if (err) {

     

       
42
       
 
       
         return err;

     

       
43
       
 
       
     }

     
···

       
46
       
 
       
     if (fs_ctx->export_flags & V9FS_SM_MAPPED) {

     

       
47
       
 
       
         /* Actual credentials are part of extended attrs */

     

       
48
       
 
       
         uid_t tmp_uid;

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

···

       
1
       
 
       
diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c

     

       
2
       
+
       
index 3f271fc..dc273f4 100644

     

       
3
       
 
       
--- a/hw/9pfs/9p-local.c

     

       
4
       
 
       
+++ b/hw/9pfs/9p-local.c

     

       
5
       
+
       
@@ -45,6 +45,23 @@

     

       
6
       
+
       
 

     

       
7
       
+
       
 #define VIRTFS_META_DIR ".virtfs_metadata"

     

       
8
       
+
       
 

     

       
9
       
+
       
+static int is_in_store_path(const char *path)

     

       
10
       
+
       
+{

     

       
11
       
+
       
+    static char *store_path = NULL;

     

       
12
       
+
       
+    int store_path_len = -1;

     

       
13
       
+
       
+

     

       
14
       
+
       
+    if (store_path_len == -1) {

     

       
15
       
+
       
+        if ((store_path = getenv("NIX_STORE")) != NULL)

     

       
16
       
+
       
+            store_path_len = strlen(store_path);

     

       
17
       
+
       
+        else

     

       
18
       
+
       
+            store_path_len = 0;

     

       
19
       
+
       
+    }

     

       
20
       
+
       
+

     

       
21
       
+
       
+    if (store_path_len > 0)

     

       
22
       
+
       
+        return strncmp(path, store_path, strlen(store_path)) == 0;

     

       
23
       
+
       
+    return 0;

     

       
24
       
+
       
+}

     

       
25
       
+
       
+

     

       
26
       
+
       
 static char *local_mapped_attr_path(FsContext *ctx, const char *path)

     

       
27
       
+
       
 {

     

       
28
       
+
       
     int dirlen;

     

       
29
       
+
       
@@ -128,6 +145,8 @@ static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)

     

       
30
       
 
       
     if (err) {

     

       
31
       
 
       
         goto err_out;

     

       
32
       
 
       
     }

     
···

       
35
       
 
       
     if (fs_ctx->export_flags & V9FS_SM_MAPPED) {

     

       
36
       
 
       
         /* Actual credentials are part of extended attrs */

     

       
37
       
 
       
         uid_t tmp_uid;

     

       
38
       
+
       
@@ -462,6 +481,11 @@ static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs,

     

       
39
       
 
       
     return ret;

     

       
40
       
 
       
 }

     

       
41
       
 
       
 

     

       
42
       
+
       
+static inline int maybe_chmod(const char *path, mode_t mode)

     

       
43
       
 
       
+{

     

       
44
       
+
       
+    return is_in_store_path(path) ? 0 : chmod(path, mode);

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
45
       
 
       
+}

     

       
46
       
 
       
+

     

       
47
       
 
       
 static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)

     

       
48
       
 
       
 {

     

       
49
       
 
       
     char *buffer;

     

       
50
       
+
       
@@ -477,7 +501,7 @@ static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)

     

       
51
       
 
       
     } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||

     

       
52
       
 
       
                (fs_ctx->export_flags & V9FS_SM_NONE)) {

     

       
53
       
 
       
         buffer = rpath(fs_ctx, path);

     
···

       
56
       
 
       
         g_free(buffer);

     

       
57
       
 
       
     }

     

       
58
       
 
       
     return ret;

     

       
59
       
+
       
@@ -621,6 +645,8 @@ static int local_fstat(FsContext *fs_ctx, int fid_type,

     

       
60
       
 
       
     if (err) {

     

       
61
       
 
       
         return err;

     

       
62
       
 
       
     }

     
···

       
65
       
 
       
     if (fs_ctx->export_flags & V9FS_SM_MAPPED) {

     

       
66
       
 
       
         /* Actual credentials are part of extended attrs */

     

       
67
       
 
       
         uid_t tmp_uid;

     

       
68
       
+
       
@@ -916,7 +942,8 @@ static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)

     

       
69
       
+
       
         (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||

     

       
70
       
+
       
         (fs_ctx->export_flags & V9FS_SM_NONE)) {

     

       
71
       
+
       
         buffer = rpath(fs_ctx, path);

     

       
72
       
+
       
-        ret = lchown(buffer, credp->fc_uid, credp->fc_gid);

     

       
73
       
+
       
+        ret = is_in_store_path(buffer)

     

       
74
       
+
       
+            ? 0 : lchown(buffer, credp->fc_uid, credp->fc_gid);

     

       
75
       
+
       
         g_free(buffer);

     

       
76
       
+
       
     } else if (fs_ctx->export_flags & V9FS_SM_MAPPED) {

     

       
77
       
+
       
         buffer = rpath(fs_ctx, path);