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@xxxxxxxxxxxxx>
---
Changes in v30:
- Comment update
Changes in v29:
- Comment updates
Changes in v27:
- Comment updates in fs.h
Changes in v26:
- Update according to tools/include/uapi/linux/fs.h
Changes in v21:
- Update tools/include/uapi/linux/fs.h
Changes in v19:
- Update fs.h according to precious patch
---
tools/include/uapi/linux/fs.h | 59 +++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/tools/include/uapi/linux/fs.h b/tools/include/uapi/linux/fs.h
index b7b56871029c5..da43810b74856 100644
--- a/tools/include/uapi/linux/fs.h
+++ b/tools/include/uapi/linux/fs.h
@@ -305,4 +305,63 @@ 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)
+
+/* Bitmasks provided in pm_scan_args masks and reported in page_region.categories. */
+#define PAGE_IS_WPALLOWED (1 << 0)
+#define PAGE_IS_WRITTEN (1 << 1)
+#define PAGE_IS_FILE (1 << 2)
+#define PAGE_IS_PRESENT (1 << 3)
+#define PAGE_IS_SWAPPED (1 << 4)
+#define PAGE_IS_PFNZERO (1 << 5)
+#define PAGE_IS_HUGE (1 << 6)
+
+/*
+ * struct page_region - Page region with flags
+ * @start: Start of the region
+ * @end: End of the region (exclusive)
+ * @categories: PAGE_IS_* category bitmask for the region
+ */
+struct page_region {
+ __u64 start;
+ __u64 end;
+ __u64 categories;
+};
+
+/* Flags for PAGEMAP_SCAN ioctl */
+#define PM_SCAN_WP_MATCHING (1 << 0) /* Write protect the pages matched. */
+#define PM_SCAN_CHECK_WPASYNC (1 << 1) /* Abort the scan when a non-WP-enabled page is found. */
+
+/*
+ * struct pm_scan_arg - Pagemap ioctl argument
+ * @size: Size of the structure
+ * @flags: Flags for the IOCTL
+ * @start: Starting address of the region
+ * @end: Ending address of the region
+ * @walk_end Address where the scan stopped (written by kernel).
+ * walk_end == end (address tags cleared) informs that the scan completed on entire range.
+ * @vec: Address of page_region struct array for output
+ * @vec_len: Length of the page_region struct array
+ * @max_pages: Optional limit for number of returned pages (0 = disabled)
+ * @category_inverted: PAGE_IS_* categories which values match if 0 instead of 1
+ * @category_mask: Skip pages for which any category doesn't match
+ * @category_anyof_mask: Skip pages for which no category matches
+ * @return_mask: PAGE_IS_* categories that are to be reported in `page_region`s returned
+ */
+struct pm_scan_arg {
+ __u64 size;
+ __u64 flags;
+ __u64 start;
+ __u64 end;
+ __u64 walk_end;
+ __u64 vec;
+ __u64 vec_len;
+ __u64 max_pages;
+ __u64 category_inverted;
+ __u64 category_mask;
+ __u64 category_anyof_mask;
+ __u64 return_mask;
+};
+
#endif /* _UAPI_LINUX_FS_H */
--
2.40.1
