[PATCH 2/3] xfs_io: add inode -l argument to return largest inode number

[Carlos Maiolino <cmaiolino@xxxxxxxxxx>]

Implements '-l' argument in inode command, returning to the user, the largest
inode allocated and used in the filesystem.

Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
---
 io/open.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/io/open.c b/io/open.c
index 6a794ba..57ff0bf 100644
--- a/io/open.c
+++ b/io/open.c
@@ -759,6 +759,7 @@ inode_help(void)
 "\n"
 "Query physical information about the inode"
 "\n"
+" -l   -- Returns the largest inode number in the filesystem\n"
 " -s   -- Returns the physical size (in bits) of the\n"
 "         largest inode number in the filesystem\n"
 "\n"));
@@ -777,23 +778,27 @@ inode_f(
        struct xfs_fsop_bulkreq bulkreq;
        int                     c;
        int                     ret_lsize = 0;
+       int                     ret_largest = 0;
 
        bulkreq.lastip = &last;
        bulkreq.icount = 1024; /* maybe an user-defined value!? */
        bulkreq.ubuffer = &igroup;
        bulkreq.ocount = &count;
 
-       while ((c = getopt(argc, argv, "s")) != EOF) {
+       while ((c = getopt(argc, argv, "sl")) != EOF) {
                switch (c) {
                case 's':
                        ret_lsize = 1;
                        break;
+               case 'l':
+                       ret_largest = 1;
+                       break;
                default:
                        return command_usage(&inode_cmd);
                }
        }
 
-       if (ret_lsize) {
+       if (ret_lsize || ret_largest) {
                for (;;) {
                        if (xfsctl(file->name, file->fd, XFS_IOC_FSINUMBERS,
                                        &bulkreq)) {
@@ -811,8 +816,11 @@ inode_f(
                lastino = igroup[lastgrp].xi_startino +
                          xfs_highbit64(igroup[lastgrp].xi_allocmask);
 
-               printf (_("Largest inode size: %d\n"),
-                        lastino > XFS_MAXINUMBER_32 ? 64 : 32);
+               if (ret_lsize)
+                       printf (_("Largest inode size: %d\n"),
+                               lastino > XFS_MAXINUMBER_32 ? 64 : 32);
+               else
+                       printf(_("Largest inode: %llu\n"), lastino);
 
        }
 
@@ -887,7 +895,7 @@ open_init(void)
 
        inode_cmd.name = "inode";
        inode_cmd.cfunc = inode_f;
-       inode_cmd.args = _("[-s]");
+       inode_cmd.args = _("[-s | -l]");
        inode_cmd.argmin = 1;
        inode_cmd.argmax = 1;
        inode_cmd.flags = CMD_NOMAP_OK;
-- 
2.4.3