diff mbox series

[Concept,10/12] linux: Add projid.h and mnt_idmapping.h headers

Message ID 20260118133734.10.a7895a8044577cfe3ec8c1f0b62bce647fcf53e0@changeid
State New
Headers
Series ext4l: Continue reducing ext4_uboot.h size with more headers |

Commit Message

Simon Glass Jan. 18, 2026, 8:37 p.m. UTC 
  From: Simon Glass <simon.glass@canonical.com>

Create linux/projid.h with kprojid_t type definition and
INVALID_PROJID constant for filesystem project quotas.

Create linux/mnt_idmapping.h with mnt_idmap structure stub for
mount ID mapping. U-Boot does not support ID mapping, so this
provides only the nop_mnt_idmap reference.

Update ext4_uboot.h to use these headers instead of duplicating the
definitions.

Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>

---

 fs/ext4l/ext4_uboot.h         | 18 ++++-----------
 include/linux/mnt_idmapping.h | 23 +++++++++++++++++++
 include/linux/projid.h        | 43 +++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 13 deletions(-)
 create mode 100644 include/linux/mnt_idmapping.h
 create mode 100644 include/linux/projid.h
diff mbox series

Patch

diff --git a/fs/ext4l/ext4_uboot.h b/fs/ext4l/ext4_uboot.h
index b5df747b963..4bc25b73f76 100644
--- a/fs/ext4l/ext4_uboot.h
+++ b/fs/ext4l/ext4_uboot.h
@@ -105,12 +105,8 @@ 
 #include <linux/percpu_counter.h>
 #include <linux/percpu.h>
 
-/* Project ID type */
-typedef struct { unsigned int val; } kprojid_t;
-
-#define make_kprojid(ns, id)	((kprojid_t){ .val = (id) })
-#define from_kprojid(ns, kprojid)	((kprojid).val)
-#define projid_eq(a, b)		((a).val == (b).val)
+/* Project ID type - use linux/projid.h */
+#include <linux/projid.h>
 
 /* kobject is now in linux/kobject.h */
 #include <linux/kobject.h>
@@ -421,11 +417,8 @@  typedef long long qsize_t;
 
 /* DT_* directory entry types are in linux/fs.h */
 
-/* mnt_idmap - stub */
-struct mnt_idmap {
-	int dummy;
-};
-extern struct mnt_idmap nop_mnt_idmap;
+/* mnt_idmap - use linux/mnt_idmapping.h */
+#include <linux/mnt_idmapping.h>
 
 /* fstrim_range - stub */
 struct fstrim_range {
@@ -900,8 +893,7 @@  void folio_put(struct folio *folio);
 void folio_get(struct folio *folio);
 void mapping_clear_folio_cache(struct address_space *mapping);
 
-/* projid_t - project ID type */
-typedef unsigned int projid_t;
+/* projid_t is now in linux/projid.h */
 
 /*
  * Additional stubs for inode.c
diff --git a/include/linux/mnt_idmapping.h b/include/linux/mnt_idmapping.h
new file mode 100644
index 00000000000..3f4e35951da
--- /dev/null
+++ b/include/linux/mnt_idmapping.h
@@ -0,0 +1,23 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Mount ID mapping definitions for U-Boot
+ *
+ * Based on Linux mnt_idmapping.h - user ID mapping for mounts.
+ * U-Boot stub - ID mapping not supported.
+ */
+#ifndef _LINUX_MNT_IDMAPPING_H
+#define _LINUX_MNT_IDMAPPING_H
+
+/**
+ * struct mnt_idmap - mount ID mapping
+ *
+ * U-Boot stub - ID mapping not used.
+ */
+struct mnt_idmap {
+	int dummy;
+};
+
+/* Global no-op ID map */
+extern struct mnt_idmap nop_mnt_idmap;
+
+#endif /* _LINUX_MNT_IDMAPPING_H */
diff --git a/include/linux/projid.h b/include/linux/projid.h
new file mode 100644
index 00000000000..d736630a957
--- /dev/null
+++ b/include/linux/projid.h
@@ -0,0 +1,43 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Project ID definitions for U-Boot
+ *
+ * Based on Linux projid.h - filesystem project IDs for quotas.
+ */
+#ifndef _LINUX_PROJID_H
+#define _LINUX_PROJID_H
+
+/**
+ * typedef kprojid_t - kernel project ID
+ *
+ * Wrapper type for project IDs used in filesystem quotas.
+ */
+typedef struct { unsigned int val; } kprojid_t;
+
+/**
+ * typedef projid_t - user-space project ID
+ */
+typedef unsigned int projid_t;
+
+/**
+ * make_kprojid() - create a kernel project ID
+ * @ns: user namespace (ignored in U-Boot)
+ * @id: project ID value
+ */
+#define make_kprojid(ns, id)	((kprojid_t){ .val = (id) })
+
+/**
+ * from_kprojid() - extract project ID value
+ * @ns: user namespace (ignored in U-Boot)
+ * @kprojid: kernel project ID
+ */
+#define from_kprojid(ns, kprojid)	((kprojid).val)
+
+/**
+ * projid_eq() - compare two project IDs
+ * @a: first project ID
+ * @b: second project ID
+ */
+#define projid_eq(a, b)		((a).val == (b).val)
+
+#endif /* _LINUX_PROJID_H */