[PATCH 7/9] xfs: wire up the v5 INUMBERS ioctl

Darrick J. Wong
2019-05-29T22:28:20Z

From: Darrick J. Wong <darrick.wong@oracle.com>

Wire up the v5 INUMBERS ioctl and rename the old one to v1.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/libxfs/xfs_fs.h | 8 ++++++++
fs/xfs/xfs_ioctl.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
fs/xfs/xfs_ioctl32.c | 1 +
fs/xfs/xfs_ondisk.h | 1 +
4 files changed, 61 insertions(+)

diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 95d0411dae9b..f9f35139d4b7 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -493,6 +493,13 @@ struct xfs_bulkstat_single_req {
struct xfs_bulkstat 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.
*/
@@ -796,6 +803,7 @@ struct xfs_scrub_metadata {
#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_BULKSTAT_SINGLE _IOR ('X', 128, struct xfs_bulkstat_single_req)
+#define XFS_IOC_INUMBERS _IOR ('X', 129, struct xfs_inumbers_req)
/* XFS_IOC_GETFSUUID ---------- deprecated 140 */

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index f6971eb9561e..294039c2ea75 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1006,6 +1006,55 @@ xfs_ioc_bulkstat_single(
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 < 0)
+ return error;
+
+ if (!error)
+ error = xfs_inumbers(&breq, xfs_inumbers_fmt);
+
+ error = xfs_bulk_ireq_teardown(&hdr, &breq, error);
+ if (error)
+ return error;
+
+ if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
+ return -EFAULT;
+
+ return 0;
+}
+
STATIC int
xfs_ioc_fsgeometry(
struct xfs_mount *mp,
@@ -2174,6 +2223,8 @@ xfs_file_ioctl(
return xfs_ioc_bulkstat(mp, cmd, arg);
case XFS_IOC_BULKSTAT_SINGLE:
return xfs_ioc_bulkstat_single(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);
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 08a90e3459d1..772086998ab3 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -578,6 +578,7 @@ xfs_file_compat_ioctl(
case XFS_IOC_SCRUB_METADATA:
case XFS_IOC_BULKSTAT:
case XFS_IOC_BULKSTAT_SINGLE:
+ case XFS_IOC_INUMBERS:
return xfs_file_ioctl(filp, cmd, p);
#if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32)
/*
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index fa1252657b08..e390e65d2438 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -151,6 +151,7 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_single_req, 224);
+ XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
}

#endif /* __XFS_ONDISK_H */