vfs: vfs-level fiemap interface

[safe/jmp/linux-2.6] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 580b513..194fb23 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -231,6 +231,7 @@ extern int dir_notify_enable;
 #define        FS_IOC_SETFLAGS                 _IOW('f', 2, long)
 #define        FS_IOC_GETVERSION               _IOR('v', 1, long)
 #define        FS_IOC_SETVERSION               _IOW('v', 2, long)
+#define FS_IOC_FIEMAP                  _IOWR('f', 11, struct fiemap)
 #define FS_IOC32_GETFLAGS              _IOR('f', 1, int)
 #define FS_IOC32_SETFLAGS              _IOW('f', 2, int)
 #define FS_IOC32_GETVERSION            _IOR('v', 1, int)
@@ -291,6 +292,7 @@ extern int dir_notify_enable;
 #include <linux/mutex.h>
 #include <linux/capability.h>
 #include <linux/semaphore.h>
+#include <linux/fiemap.h>
 
 #include <asm/atomic.h>
 #include <asm/byteorder.h>
@@ -1179,6 +1181,20 @@ extern void dentry_unhash(struct dentry *dentry);
 extern int file_permission(struct file *, int);
 
 /*
+ * VFS FS_IOC_FIEMAP helper definitions.
+ */
+struct fiemap_extent_info {
+       unsigned int fi_flags;          /* Flags as passed from user */
+       unsigned int fi_extents_mapped; /* Number of mapped extents */
+       unsigned int fi_extents_max;    /* Size of fiemap_extent array */
+       struct fiemap_extent *fi_extents_start; /* Start of fiemap_extent
+                                                * array */
+};
+int fiemap_fill_next_extent(struct fiemap_extent_info *info, u64 logical,
+                           u64 phys, u64 len, u32 flags);
+int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags);
+
+/*
  * File types
  *
  * NOTE! These match bits 12..15 of stat.st_mode
@@ -1287,6 +1303,8 @@ struct inode_operations {
        void (*truncate_range)(struct inode *, loff_t, loff_t);
        long (*fallocate)(struct inode *inode, int mode, loff_t offset,
                          loff_t len);
+       int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
+                     u64 len);
 };
 
 struct seq_file;