Some commands need files in which they can lseek backwards which
is particularly not possible on TFTP. Instead of hiding this
behind can_lseek_backward() create a function for it which tests
if the file is on TFTP directly rather than using different
lseek operations.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
fs/fs.c | 22 ++++++++++++++++++++++
include/fs.h | 10 ++++++++++
2 files changed, 32 insertions(+)
diff --git a/fs/fs.c b/fs/fs.c
index 6f15e93ba9..e073e3577d 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -1906,3 +1906,25 @@ char *path_get_linux_rootarg(const char *path)
return xstrdup(str);
}
+
+/**
+ * __is_tftp_fs() - return true when path is mounted on TFTP
+ * @path: The path
+ *
+ * Do not use directly, use is_tftp_fs instead.
+ *
+ * Return: true when @path is on TFTP, false otherwise
+ */
+bool __is_tftp_fs(const char *path)
+{
+ struct fs_device_d *fsdev;
+
+ fsdev = get_fsdevice_by_path(path);
+ if (!fsdev)
+ return false;
+
+ if (strcmp(fsdev->driver->drv.name, "tftp"))
+ return false;
+
+ return true;
+}
diff --git a/include/fs.h b/include/fs.h
index 3d88bfad4a..5a50d9b9e4 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -121,6 +121,16 @@ static inline int can_lseek_backward(int fd)
return 1;
}
+bool __is_tftp_fs(const char *path);
+
+static inline bool is_tftp_fs(const char *path)
+{
+ if (!IS_ENABLED(CONFIG_FS_TFTP))
+ return 0;
+
+ return __is_tftp_fs(path);
+}
+
#define drv_to_fs_driver(d) container_of(d, struct fs_driver_d, drv)
int flush(int fd);
--
2.11.0
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