запросить информацию сводного счетчика XFS (query XFS summary counter information)
Имя (Name)
ioctl_xfs_fscounts - query XFS summary counter information
Синопсис (Synopsis)
#include <xfs/xfs_fs.h>
int ioctl(int fd, XFS_IOC_FSCOUNTS, struct xfs_fsop_counts *arg);
Описание (Description)
Query the raw filesystem summary counters. Unlike statvfs(3),
the values returned here are the raw values, which do not reflect
any alterations or limits set by project quotas. The counter
information is conveyed in a structure of the following form:
struct xfs_fsop_counts {
__u64 freedata;
__u64 freertx;
__u64 freeino;
__u64 allocino;
};
The fields of this structure are as follows:
freedata is the number of free filesystem blocks on the data
device.
freertx is the number of free extents on the realtime device.
freeino is the number of inode records that are not in use within
the space that has been allocated for them.
allocino is the number of inode records for which space has been
allocated.
Возвращаемое значение (Return value)
On error, -1 is returned, and errno is set to indicate the error.
Ошибки (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 allocation group number is not valid for
this filesystem.
EIO An I/O error was encountered while performing the query.
Стандарты (Conforming to)
This API is specific to XFS filesystem on the Linux kernel.
Смотри также (See also)
ioctl(2)
