1IOCTL-XFS-FSCOUNTS(2)         System Calls Manual        IOCTL-XFS-FSCOUNTS(2)
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NAME

6       ioctl_xfs_fscounts - query XFS summary counter information
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SYNOPSIS

9       #include <xfs/xfs_fs.h>
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11       int ioctl(int fd, XFS_IOC_FSCOUNTS, struct xfs_fsop_counts *arg);
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DESCRIPTION

14       Query the raw filesystem summary counters.  Unlike statvfs(3), the val‐
15       ues returned here are the raw values, which do not reflect  any  alter‐
16       ations  or  limits  set  by project quotas.  The counter information is
17       conveyed in a structure of the following form:
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19           struct xfs_fsop_counts {
20                __u64   freedata;
21                __u64   freertx;
22                __u64   freeino;
23                __u64   allocino;
24           };
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26       The fields of this structure are as follows:
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28       freedata is the number of free filesystem blocks on the data device.
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30       freertx is the number of free extents on the realtime device.
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32       freeino is the number of inode records that are not in use  within  the
33       space that has been allocated for them.
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35       allocino  is the number of inode records for which space has been allo‐
36       cated.
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RETURN VALUE

39       On error, -1 is returned, and errno is set to indicate the error.
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ERRORS

42       Error codes can be one of, but are not limited to, the following:
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44       EFSBADCRC
45              Metadata checksum validation failed while performing the query.
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47       EFSCORRUPTED
48              Metadata corruption was encountered while performing the query.
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50       EINVAL The specified allocation group number  is  not  valid  for  this
51              filesystem.
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53       EIO    An I/O error was encountered while performing the query.
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CONFORMING TO

56       This API is specific to XFS filesystem on the Linux kernel.
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SEE ALSO

59       ioctl(2)
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63XFS                               2019-06-17             IOCTL-XFS-FSCOUNTS(2)
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