NAME |SYNOPSIS |DESCRIPTION |FILESYSTEM FEATURE FLAGS |XFS METADATA HEALTH REPORTING |RETURN VALUE |ERRORS |CONFORMING TO |SEE ALSO |COLOPHON |
IOCTL-XFS-FSOP-GEOMETRY(2) System Calls Manual IOCTL-XFS-FSOP-GEOMETRY(2)ioctl_xfs_fsop_geometry - report XFS filesystem layout and features
#include <xfs/xfs_fs.h>int ioctl(intfd, XFS_IOC_FSOP_GEOMETRY, struct xfs_fsop_geom*arg);int ioctl(intfd, XFS_IOC_FSOP_GEOMETRY_V4, struct xfs_fsop_geom_v4*arg);int ioctl(intfd, XFS_IOC_FSOP_GEOMETRY_V1, struct xfs_fsop_geom_v1*arg);
Report the details of an XFS filesystem layout, features, and other descriptive items. This information is conveyed in a structure of the following form: struct xfs_fsop_geom { __u32 blocksize; __u32 rtextsize; __u32 agblocks; __u32 agcount; __u32 logblocks; __u32 sectsize; __u32 inodesize; __u32 imaxpct; __u64 datablocks; __u64 rtblocks; __u64 rtextents; __u64 logstart; unsigned char uuid[16]; __u32 sunit; __u32 swidth; __s32 version; __u32 flags; __u32 logsectsize; __u32 rtsectsize; __u32 dirblocksize; /* struct xfs_fsop_geom_v1 stops here. */ __u32 logsunit; /* struct xfs_fsop_geom_v4 stops here. */ __u32 sick; __u32 checked; __u64 reserved[17]; };blocksize is the size of a fundamental filesystem block, in bytes.rtextsize is the size of an extent on the realtime volume, in bytes.agblocks is the size of an allocation group, in units of filesystem blocks.agcount is the number of allocation groups in the filesystem.logblocks is the size of the log, in units of filesystem blocks.sectsize is the smallest amount of data that can be written to the data device atomically, in bytes.inodesize is the size of an inode record, in bytes.imaxpct is the maximum percentage of the filesystem that can be allocated to inode record blocks.datablocks is the size of the data device, in units of filesystem blocks.rtblocks is the size of the realtime device, in units of filesystem blocks.rtextents is the number of extents that can be allocated on the realtime device.logstart is the start of the log, in units of filesystem blocks. If the filesystem has an external log, this will be zero.uuid is the universal unique identifier of the filesystem.sunit is what the filesystem has been told is the size of a RAID stripe unit on the underlying data device, in filesystem blocks.swidth is what the filesystem has been told is the width of a RAID stripe on the underlying data device, in units of RAID stripe units.version is the version of this structure. This value will be XFS_FSOP_GEOM_VERSION.flags tell us what features are enabled on the filesystem. Refer to the sectionFILESYSTEM FEATURE FLAGSbelow for more information about each feature.logsectsize is the smallest amount of data that can be written to the log device atomically, in bytes.rtsectsize is the smallest amount of data that can be written to the realtime device atomically, in bytes.dirblocksize is the size of directory blocks, in bytes.logsunit is what the filesystem has been told is the size of a RAID stripe unit on the underlying log device, in filesystem blocks. This field is meaningful only if the flagXFS_FSOP_GEOM_FLAGS_LOGV2is set. The fieldssick andchecked indicate the relative health of various whole-filesystem metadata. Please see the sectionXFS METADATAHEALTH REPORTINGfor more details.reserved is set to zero.Filesystem features are reported to userspace as a combination the following flags:XFS_FSOP_GEOM_FLAGS_ATTR Extended attributes are present.XFS_FSOP_GEOM_FLAGS_NLINK Files on this filesystem support up to 2^32 hard links. If this flag is not set, files on this filesystem support only up to 2^16 hard links.XFS_FSOP_GEOM_FLAGS_QUOTA Quotas are enabled.XFS_FSOP_GEOM_FLAGS_IALIGN Inodes are aligned for better performance.XFS_FSOP_GEOM_FLAGS_DALIGN Filesystem tries to align data block allocations to RAID stripe units for better performance.XFS_FSOP_GEOM_FLAGS_SHARED Unused.XFS_FSOP_GEOM_FLAGS_EXTFLG Filesystem supports unwritten extents.XFS_FSOP_GEOM_FLAGS_DIRV2 Directories are in version 2 format and maintain free space data for better performance. Version 1 format directories are no longer supported.XFS_FSOP_GEOM_FLAGS_LOGV2 Log uses the V2 format.XFS_FSOP_GEOM_FLAGS_SECTOR The log device has a sector size larger than 512 bytes.XFS_FSOP_GEOM_FLAGS_ATTR2 Filesystem contains V2 extended attributes.XFS_FSOP_GEOM_FLAGS_PROJID32 Project IDs can be as large as 2^32. If this flag is not set, the filesystem supports only 2^16 project IDs.XFS_FSOP_GEOM_FLAGS_DIRV2CI Case-insensitive lookups are supported on directories.XFS_FSOP_GEOM_FLAGS_LAZYSB On-disk superblock counters are updated only at unmount time.XFS_FSOP_GEOM_FLAGS_V5SB Metadata blocks are self describing and contain checksums.XFS_FSOP_GEOM_FLAGS_FTYPE Directories contain inode types in directory entries.XFS_FSOP_GEOM_FLAGS_FINOBT Filesystem maintains an index of free inodes.XFS_FSOP_GEOM_FLAGS_SPINODES Filesystem may allocate discontiguous inode chunks when free space is fragmented.XFS_FSOP_GEOM_FLAGS_RMAPBT Filesystem stores reverse mappings of blocks to owners.XFS_FSOP_GEOM_FLAGS_REFLINK Filesystem supports sharing blocks between files.
The online filesystem checking utility scans metadata and records what it finds in the kernel incore state. The following scheme is used for userspace to read the incore health status of the filesystem: · If a given sick flag is set insick, then that piece of metadata has been observed to be damaged. The same bit should be set inchecked. · If a given sick flag is set inchecked but is not set insick, then that piece of metadata has been checked and is not faulty. · If a given sick flag is not set inchecked, then no conclusion can be made. The following flags apply to these fields:XFS_FSOP_GEOM_SICK_COUNTERS Inode and space summary counters.XFS_FSOP_GEOM_SICK_UQUOTA User quota information.XFS_FSOP_GEOM_SICK_GQUOTA Group quota information.XFS_FSOP_GEOM_SICK_PQUOTA Project quota information.XFS_FSOP_GEOM_SICK_RT_BITMAP Free space bitmap for the realtime device.XFS_FSOP_GEOM_SICK_RT_SUMMARY Free space summary for the realtime device.
On error, -1 is returned, anderrno is set to indicate the error.
Error codes can be one of, but are not limited to, the following:EFAULTThe kernel was not able to copy into the userspace buffer.EFSBADCRC Metadata checksum validation failed while performing the query.EFSCORRUPTED Metadata corruption was encountered while performing the query.EIOAn 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 thexfsprogs (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 2020-09-18. (At that time, the date of the most recent commit that was found in the repository was 2020-09-04.) 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 isnot part of the original manual page), send a mail to man-pages@man7.orgXFS 2019-06-17 IOCTL-XFS-FSOP-GEOMETRY(2)Pages that refer to this page:xfsctl(3)
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