[PATCH] xfs_io: Implement inodes64 command

[Carlos Maiolino <cmaiolino@xxxxxxxxxx>]

Implement an easy way to check a filesystem for the existence of 64bit inodes.

Based on XFS_IOC_FSINUMBERS, and starting with a lastip of XFS_MAXINUMBER_32, it
returns a string saying if there is or there isn't 64bit inodes in the
filesystem.

Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
---
 io/open.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/io/open.c b/io/open.c
index ac5a5e0..b25b09d 100644
--- a/io/open.c
+++ b/io/open.c
@@ -20,6 +20,7 @@
 #include "input.h"
 #include "init.h"
 #include "io.h"
+#include "libxfs.h"
 
 #ifndef __O_TMPFILE
 #if defined __alpha__
@@ -44,6 +45,7 @@ static cmdinfo_t statfs_cmd;
 static cmdinfo_t chproj_cmd;
 static cmdinfo_t lsproj_cmd;
 static cmdinfo_t extsize_cmd;
+static cmdinfo_t inodes64_cmd;
 static prid_t prid;
 static long extsize;
 
@@ -750,6 +752,36 @@ statfs_f(
        return 0;
 }
 
+static int
+inodes64_f(
+         int                   argc,
+         char                  **argv)
+{
+       int                     i;
+       __s32                   count;
+       __u64                   last = XFS_MAXINUMBER_32;
+       xfs_inogrp_t            igroup;
+       xfs_fsop_bulkreq_t      bulkreq;
+
+       bulkreq.lastip = &last;
+       bulkreq.icount = 1;
+       bulkreq.ubuffer = &igroup;
+       bulkreq.ocount = &count;
+
+       if (!xfsctl(file->name, file->fd, XFS_IOC_FSINUMBERS, &bulkreq)) {
+               if (count > 0) {
+                       printf("Filesystem does have 64bit inodes\n");
+                       return 0;
+               } else {
+                       printf("Filesystem does not have 64bit inodes\n");
+                       return 0;
+               }
+       }
+       perror("xfsctl(XFS_IOC_FSINUMBERS)");
+       exitcode = 1;
+       return 0;
+}
+
 void
 open_init(void)
 {
@@ -815,6 +847,12 @@ open_init(void)
                _("get/set preferred extent size (in bytes) for the open file");
        extsize_cmd.help = extsize_help;
 
+       inodes64_cmd.name = "inodes64";
+       inodes64_cmd.cfunc = inodes64_f;
+       inodes64_cmd.flags = CMD_NOMAP_OK;
+       inodes64_cmd.oneline =
+               _("Checks if filesyste contais 64bit inodes");
+
        add_command(&open_cmd);
        add_command(&stat_cmd);
        add_command(&close_cmd);
@@ -822,4 +860,5 @@ open_init(void)
        add_command(&chproj_cmd);
        add_command(&lsproj_cmd);
        add_command(&extsize_cmd);
+       add_command(&inodes64_cmd);
 }
-- 
2.4.3