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From:   Muhammad Usama Anjum <usama.anjum@collabora.com>
To:     Peter Xu <peterx@redhat.com>, David Hildenbrand <david@redhat.com>,
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Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
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        "Gustavo A . R . Silva" <gustavoars@kernel.org>,
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        linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
        Greg KH <gregkh@linuxfoundation.org>, kernel@collabora.com
Subject: [PATCH v24 3/5] tools headers UAPI: Update linux/fs.h with the kernel sources
Date:   Tue, 11 Jul 2023 17:52:39 +0500
Message-Id: <20230711125241.1587820-4-usama.anjum@collabora.com>
In-Reply-To: <20230711125241.1587820-1-usama.anjum@collabora.com>
References: <20230711125241.1587820-1-usama.anjum@collabora.com>
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New IOCTL and macros has been added in the kernel sources. Update the
tools header file as well.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
Changes in v21:
- Update tools/include/uapi/linux/fs.h

Changes in v19:
- Update fs.h accourding to precious patch
---
 tools/include/uapi/linux/fs.h | 55 +++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/tools/include/uapi/linux/fs.h b/tools/include/uapi/linux/fs.h
index b7b56871029c..ac684d99e68f 100644
--- a/tools/include/uapi/linux/fs.h
+++ b/tools/include/uapi/linux/fs.h
@@ -305,4 +305,59 @@ typedef int __bitwise __kernel_rwf_t;
 #define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
 			 RWF_APPEND)
 
+/* Pagemap ioctl */
+#define PAGEMAP_SCAN	_IOWR('f', 16, struct pm_scan_arg)
+
+/* Bits are set in flags of the page_region and masks in pm_scan_args */
+#define PAGE_IS_WRITTEN		(1 << 0)
+#define PAGE_IS_FILE		(1 << 1)
+#define PAGE_IS_PRESENT		(1 << 2)
+#define PAGE_IS_SWAPPED		(1 << 3)
+#define PAGE_IS_PFNZERO		(1 << 4)
+
+/*
+ * struct page_region - Page region with flags
+ * @start:	Start of the region
+ * @len:	Length of the region in pages
+ * @bitmap:	Bits sets for the region
+ */
+struct page_region {
+	__u64 start;
+	__u64 len;
+	__u64 flags;
+};
+
+/*
+ * struct pm_scan_arg - Pagemap ioctl argument
+ * @size:		Size of the structure
+ * @flags:		Flags for the IOCTL
+ * @start:		Starting address of the region
+ *			(Ending address of the walk is also returned in it)
+ * @end:		Ending address of the region
+ * @vec:		Address of page_region struct array for output
+ * @vec_len:		Length of the page_region struct array
+ * @max_pages:		Optional max return pages
+ * @required_mask:	Required mask - All of these bits have to be set in the PTE
+ * @anyof_mask:		Any mask - Any of these bits are set in the PTE
+ * @excluded_mask:	Exclude mask - None of these bits are set in the PTE
+ * @return_mask:	Bits that are to be reported in page_region
+ */
+struct pm_scan_arg {
+	__u64 size;
+	__u64 flags;
+	__u64 start;
+	__u64 end;
+	__u64 vec;
+	__u64 vec_len;
+	__u64 max_pages;
+	__u64 required_mask;
+	__u64 anyof_mask;
+	__u64 excluded_mask;
+	__u64 return_mask;
+};
+
+/* Supported flags */
+#define PM_SCAN_OP_GET	(1 << 0)
+#define PM_SCAN_OP_WP	(1 << 1)
+
 #endif /* _UAPI_LINUX_FS_H */
-- 
2.39.2