xref: /aosp_15_r20/external/libfuse/Android.patch (revision 9e5649576b786774a32d7b0252c9cd8c6538fa49)

diff --git a/Android.patch b/Android.patch
new file mode 100644
index 0000000..e69de29
diff --git a/include/fuse_kernel.h b/include/fuse_kernel.h
index 2971d29..8a45f42 100644
--- a/include/fuse_kernel.h
+++ b/include/fuse_kernel.h
@@ -425,6 +425,9 @@ enum fuse_opcode {

 	/* CUSE specific operations */
 	CUSE_INIT		= 4096,
+
+        /* Android specific operations */
+        FUSE_CANONICAL_PATH     = 2016,
 };

 enum fuse_notify_code {
diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h
index 18c6363..e81c282 100644
--- a/include/fuse_lowlevel.h
+++ b/include/fuse_lowlevel.h
@@ -317,6 +317,18 @@ struct fuse_lowlevel_ops {
 	 */
 	void (*readlink) (fuse_req_t req, fuse_ino_t ino);

+        /**
+	 * Return canonical path for inotify
+	 *
+	 * Valid replies:
+	 *   fuse_reply_canonical_path
+	 *   fuse_reply_err
+	 *
+	 * @param req request handle
+	 * @param ino the inode number
+	 */
+	void (*canonical_path) (fuse_req_t req, fuse_ino_t ino);
+
 	/**
 	 * Create file node
 	 *
@@ -1337,6 +1349,18 @@ int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
  */
 int fuse_reply_readlink(fuse_req_t req, const char *link);

+/**
+ * Reply with the canonical path for inotify
+ *
+ * Possible requests:
+ *   canonical_path
+ *
+ * @param req request handle
+ * @param path to canonicalize
+ * @return zero for success, -errno for failure to send reply
+ */
+int fuse_reply_canonical_path(fuse_req_t req, const char *path);
+
 /**
  * Reply with open parameters
  *
diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index f2d7038..334b497 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -450,6 +450,11 @@ int fuse_reply_readlink(fuse_req_t req, const char *linkname)
 	return send_reply_ok(req, linkname, strlen(linkname));
 }

+int fuse_reply_canonical_path(fuse_req_t req, const char *path)
+{
+	return send_reply_ok(req, path, strlen(path));
+}
+
 int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f)
 {
 	struct fuse_open_out arg;
@@ -1202,6 +1207,16 @@ static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		fuse_reply_err(req, ENOSYS);
 }

+static void do_canonical_path(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+	(void) inarg;
+
+	if (req->se->op.canonical_path)
+		req->se->op.canonical_path(req, nodeid);
+	else
+		fuse_reply_err(req, ENOSYS);
+}
+
 static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
 	struct fuse_mknod_in *arg = (struct fuse_mknod_in *) inarg;
@@ -2456,6 +2471,7 @@ static struct {
 	[FUSE_GETATTR]	   = { do_getattr,     "GETATTR"     },
 	[FUSE_SETATTR]	   = { do_setattr,     "SETATTR"     },
 	[FUSE_READLINK]	   = { do_readlink,    "READLINK"    },
+        [FUSE_CANONICAL_PATH] = { do_canonical_path, "CANONICAL_PATH" },
 	[FUSE_SYMLINK]	   = { do_symlink,     "SYMLINK"     },
 	[FUSE_MKNOD]	   = { do_mknod,       "MKNOD"	     },
 	[FUSE_MKDIR]	   = { do_mkdir,       "MKDIR"	     },
diff --git a/lib/fuse_versionscript b/lib/fuse_versionscript
index d18ba29..4c075a3 100644
--- a/lib/fuse_versionscript
+++ b/lib/fuse_versionscript
@@ -163,6 +163,7 @@ FUSE_3.7 {
 	global:
 		fuse_set_log_func;
 		fuse_log;
+		fuse_reply_canonical_path;
 } FUSE_3.3;

 # Local Variables: