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xfs: Introduce a new ioctl(2) to get AG state

PATCH In review Jeff Liu 1 participant 1 message Nov 16, 2012 XFS filesystem

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Jeff Liu

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PATCH 4/15 xfs: Introduce a new ioctl(2) to get AG state

Introduce a new ioctl(2) to get a.g. state.

Signed-off-by Jie Liu <[email protected]>
---
 fs/xfs/xfs_ag.h    |    2 +
 fs/xfs/xfs_fs.h    |    1 +
 fs/xfs/xfs_fsops.c |   53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/xfs/xfs_ioctl.c |   19 ++++++++++++++++++
 4 files changed, 75 insertions(+), 0 deletions(-)
fs/xfs/xfs_ag.h +2 -0
index e2588d9..7ec7dba 100644
@@ -248,6 +248,8 @@ typedef struct xfs_ioc_agstate {
 #define XFS_AG_STATE_ALLOC_DENY		(1 << 0)
 #define XFS_AG_ALL_STATE		(XFS_AG_STATE_ALLOC_DENY)
 
+extern int xfs_get_agstate(struct xfs_mount *mp,
+			   struct xfs_ioc_agstate *agstate);
 extern int xfs_set_agstate(struct xfs_mount *mp,
 			   struct xfs_ioc_agstate *agstate);
fs/xfs/xfs_fs.h +1 -0
index 991c09e..e306b8f 100644
@@ -487,6 +487,7 @@ typedef struct xfs_handle {
 #define XFS_IOC_FSGEOMETRY	     _IOR ('X', 124, struct xfs_fsop_geom)
 #define XFS_IOC_GOINGDOWN	     _IOR ('X', 125, __uint32_t)
 #define XFS_IOC_SET_AGSTATE	     _IOW('X', 126, struct xfs_ioc_agstate)
+#define XFS_IOC_GET_AGSTATE	     _IOR('X', 127, struct xfs_ioc_agstate)
 /*	XFS_IOC_GETFSUUID ---------- deprecated 140	 */
fs/xfs/xfs_fsops.c +53 -0

59 lines not on this page · raw message

fs/xfs/xfs_ioctl.c +19 -0
index efe39ef..4d3a705 100644
@@ -1615,6 +1615,25 @@ xfs_file_ioctl(
 		return -error;
 	}
 
+	case XFS_IOC_GET_AGSTATE: {
+		xfs_ioc_agstate_t inout;
+
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&inout, arg, sizeof(inout)))
+			return -XFS_ERROR(EFAULT);
+
+		error = xfs_get_agstate(mp, &inout);
+		if (error)
+			return -error;
+
+		if (copy_to_user(arg, &inout, sizeof(inout)))
+			return -XFS_ERROR(EFAULT);
+
+		return 0;
+	}
+
 	default:
 		return -ENOTTY;
 	}
Signature · 6 lines
1.7.4.1

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