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xfs: wire up the v5 inumbers ioctl

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Wire up the v5 INUMBERS ioctl.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2019-07-03 20:36:28 -07:00
parent 0448b6f488
commit fba9760a43
4 changed files with 62 additions and 0 deletions
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8
fs/xfs/libxfs/xfs_fs.h
View File

@ -478,6 +478,13 @@ struct xfs_bulkstat_req {
#define XFS_BULKSTAT_REQ_SIZE(nr) (sizeof(struct xfs_bulkstat_req) + \
(nr) * sizeof(struct xfs_bulkstat))
struct xfs_inumbers_req {
struct xfs_bulk_ireq hdr;
struct xfs_inumbers inumbers[];
};
#define XFS_INUMBERS_REQ_SIZE(nr) (sizeof(struct xfs_inumbers_req) + \
(nr) * sizeof(struct xfs_inumbers))
/*
* Error injection.
*/
@ -780,6 +787,7 @@ struct xfs_scrub_metadata {
#define XFS_IOC_GOINGDOWN _IOR ('X', 125, uint32_t)
#define XFS_IOC_FSGEOMETRY _IOR ('X', 126, struct xfs_fsop_geom)
#define XFS_IOC_BULKSTAT _IOR ('X', 127, struct xfs_bulkstat_req)
#define XFS_IOC_INUMBERS _IOR ('X', 128, struct xfs_inumbers_req)
/* XFS_IOC_GETFSUUID ---------- deprecated 140 */

52
fs/xfs/xfs_ioctl.c
View File

@ -913,6 +913,56 @@ out_teardown:
return 0;
}
STATIC int
xfs_inumbers_fmt(
struct xfs_ibulk *breq,
const struct xfs_inumbers *igrp)
{
if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
return -EFAULT;
return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
}
/* Handle the v5 inumbers ioctl. */
STATIC int
xfs_ioc_inumbers(
struct xfs_mount *mp,
unsigned int cmd,
struct xfs_inumbers_req __user *arg)
{
struct xfs_bulk_ireq hdr;
struct xfs_ibulk breq = {
.mp = mp,
};
int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (XFS_FORCED_SHUTDOWN(mp))
return -EIO;
if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
return -EFAULT;
error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
if (error == XFS_ITER_ABORT)
goto out_teardown;
if (error < 0)
return error;
error = xfs_inumbers(&breq, xfs_inumbers_fmt);
if (error)
return error;
out_teardown:
xfs_bulk_ireq_teardown(&hdr, &breq);
if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
return -EFAULT;
return 0;
}
STATIC int
xfs_ioc_fsgeometry(
struct xfs_mount *mp,
@ -2079,6 +2129,8 @@ xfs_file_ioctl(
case XFS_IOC_BULKSTAT:
return xfs_ioc_bulkstat(mp, cmd, arg);
case XFS_IOC_INUMBERS:
return xfs_ioc_inumbers(mp, cmd, arg);
case XFS_IOC_FSGEOMETRY_V1:
return xfs_ioc_fsgeometry(mp, arg, 3);

1
fs/xfs/xfs_ioctl32.c
View File

@ -575,6 +575,7 @@ xfs_file_compat_ioctl(
case FS_IOC_GETFSMAP:
case XFS_IOC_SCRUB_METADATA:
case XFS_IOC_BULKSTAT:
case XFS_IOC_INUMBERS:
return xfs_file_ioctl(filp, cmd, p);
#if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32)
/*

1
fs/xfs/xfs_ondisk.h
View File

@ -150,6 +150,7 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
}
#endif /* __XFS_ONDISK_H */