|
HTML rendering created 2025-02-02 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. |
|
|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
|
|
|
IOCTL-XFS...V-METADATA(2) System Calls Manual IOCTL-XFS...V-METADATA(2)
ioctl_xfs_scrubv_metadata - check a lot of XFS filesystem metadata
#include <xfs/xfs_fs.h>
int ioctl(int dest_fd, XFS_IOC_SCRUBV_METADATA, struct
xfs_scrub_vec_head *arg);
This XFS ioctl asks the kernel driver to examine several pieces of
filesystem metadata for errors or suboptimal metadata. Multiple
scrub types can be invoked to target a single filesystem object.
See ioctl_xfs_scrub_metadata(2) for a discussion of metadata
validation, and documentation of the various XFS_SCRUB_TYPE and
XFS_SCRUB_FLAGS values referenced below.
The types and location of the metadata to scrub are conveyed as a
vector with a header of the following form:
struct xfs_scrub_vec_head {
__u64 svh_ino;
__u32 svh_gen;
__u32 svh_agno;
__u32 svh_flags;
__u16 svh_rest_us;
__u16 svh_nr;
__u64 svh_reserved;
__u64 svh_vectors;
};
The field svh_ino, svh_gen, and svh_agno correspond to the sm_ino,
sm_gen, and sm_agno fields of the regular scrub ioctl. Exactly
one filesystem object can be specified in a single call. The
kernel will proceed with each vector in svh_vectors until progress
is no longer possible.
The field svh_rest_us specifies an amount of time to pause between
each scrub invocation to give the system a chance to process other
requests.
The field svh_nr specifies the number of vectors in the
svh_vectors array.
The field svh_vectors is a pointer to an array of struct
xfs_scrub_vec structures.
The field svh_reserved must be zero.
Each vector has the following form:
struct xfs_scrub_vec {
__u32 sv_type;
__u32 sv_flags;
__s32 sv_ret;
__u32 sv_reserved;
};
The fields sv_type and sv_flags indicate the type of metadata to
check and the behavioral changes that userspace will permit of the
kernel. The sv_flags field will be updated upon completion of the
scrub call. See the documentation of XFS_SCRUB_TYPE_* and
XFS_SCRUB_[IO]FLAG_* values in ioctl_xfs_scrub_metadata(2) for a
detailed description of their purpose.
If a vector's sv_type field is set to the value
XFS_SCRUB_TYPE_BARRIER, the kernel will stop processing vectors
and return to userspace if a scrubber flags corruption by setting
one of the XFS_SCRUB_OFLAG_* values in sv_flags or returns an
operation error in sv_ret. Otherwise, the kernel returns only
after processing all vectors.
The sv_ret field is set to the return value of the scrub function.
See the RETURN VALUE section of the ioctl_xfs_scrub_metadata(2)
manual page for more information.
The sv_reserved field must be zero.
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:
EINVAL One or more of the arguments specified is invalid.
EINTR The operation was interrupted.
ENOMEM There was not sufficient memory to perform the scrub or
repair operation.
EFAULT A memory fault was encountered while reading or writing the
vector.
This API is specific to XFS filesystem on the Linux kernel.
These operations may block other filesystem operations for a long
time. A calling process can stop the operation by being sent a
fatal signal, but non-fatal signals are blocked.
ioctl(2) ioctl_xfs_scrub_metadata(2) xfs_scrub(8) xfs_repair(8)
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
2025-02-02. (At that time, the date of the most recent commit
that was found in the repository was 2024-12-02.) 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 2024-05-21 IOCTL-XFS...V-METADATA(2)
Copyright and license for this manual page
|
HTML rendering created 2025-02-02 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. |
|