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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | SEE ALSO | COLOPHON |
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IOCTL-XFS-...P-GEOMETRY(2) System Calls Manual IOCTL-XFS-...P-GEOMETRY(2)
ioctl_xfs_rtgroup_geometry - query XFS realtime group geometry
information
#include <xfs/xfs_fs.h>
int ioctl(int fd, XFS_IOC_RTGROUP_GEOMETRY, struct
xfs_rtgroup_geometry *arg);
This XFS ioctl retrieves the geometry information for a given
realtime group. The geometry information is conveyed in a
structure of the following form:
struct xfs_rtgroup_geometry {
__u32 rg_number;
__u32 rg_length;
__u32 rg_sick;
__u32 rg_checked;
__u32 rg_flags;
__u32 rg_reserved[27];
};
rg_number
The caller must set this field to the index of the realtime
group that the caller wishes to learn about.
rg_length
The length of the realtime group is returned in this field,
in units of filesystem blocks. rg_flags The caller can set
this field to change the operational behavior of the ioctl.
Currently no flags are defined, so this field must be zero.
rg_reserved and rg_pad
All reserved fields will be set to zero on return.
The fields rg_sick and rg_checked indicate the relative health of
various realtime group metadata:
• If a given sick flag is set in rg_sick, then that piece of
metadata has been observed to be damaged. The same bit will be
set in rg_checked.
• If a given sick flag is set in rg_checked and is not set in
rg_sick, then that piece of metadata has been checked and is not
faulty.
• If a given sick flag is not set in rg_checked, then no
conclusion can be made.
The following flags apply to these fields:
XFS_RTGROUP_GEOM_SICK_SUPER
Realtime group superblock.
XFS_RTGROUP_GEOM_SICK_BITMAP
Realtime bitmap for this group.
XFS_RTGROUP_GEOM_SICK_SUMMARY
Realtime summary for this group.
XFS_RTGROUP_GEOM_SICK_RTRMAPBT
Reverse mapping btree for this group.
On error, -1 is returned, and errno is set to indicate the error.
Error codes can be one of, but are not limited to, the following:
EFSBADCRC
Metadata checksum validation failed while performing the
query.
EFSCORRUPTED
Metadata corruption was encountered while performing the
query.
EINVAL The specified realtime group number is not valid for this
filesystem.
EIO An I/O error was encountered while performing the query.
This API is specific to XFS filesystem on the Linux kernel.
ioctl(2)
This page is part of the xfsprogs (utilities for XFS filesystems)
project. Information about the project can be found at
⟨http://xfs.org/⟩. If you have a bug report for this manual page,
send it to linux-xfs@vger.kernel.org. This page was obtained from
the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git⟩ on
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-06-23.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
XFS 2022-08-18 IOCTL-XFS-...P-GEOMETRY(2)
Copyright and license for this manual page
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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