[PATCH] xfs_io: Implement inodes64 command

[Eric Sandeen]

On Sep 21, 2015, at 3:56 AM, Carlos Maiolino <cmaiolino at redhat.com> wrote:
> 
> 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 at redhat.com>
> ---
> 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");

"Check if filesystem contains 64bit inodes"

Still needs a manpage update ;)

Also is it ok to not have inodes64_cmd.help?  (Sorry, on phone right now, can't look, perhaps it's fine)

Thanks,
Eric


> +
>    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
> 
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