Introduce a new xfs_io command: agstate.
This command is used to get/set state for a given allocation group.
Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
include/xfs_ag.h | 32 ++++++++++++++++++++++++++++----
include/xfs_fs.h | 2 ++
io/Makefile | 2 +-
io/init.c | 1 +
4 files changed, 32 insertions(+), 5 deletions(-)
diff --git a/include/xfs_ag.h b/include/xfs_ag.h
index 5adce91..bd5f4d4 100644
--- a/include/xfs_ag.h
+++ b/include/xfs_ag.h
@@ -69,6 +69,10 @@ typedef struct xfs_agf {
__be32 agf_freeblks; /* total free blocks */
__be32 agf_longest; /* longest free space */
__be32 agf_btreeblks; /* # of blocks held in AGF btrees */
+ /*
+ * state
+ */
+ __be32 agf_state; /* persistent a.g. state */
} xfs_agf_t;
#define XFS_AGF_MAGICNUM 0x00000001
@@ -83,7 +87,8 @@ typedef struct xfs_agf {
#define XFS_AGF_FREEBLKS 0x00000200
#define XFS_AGF_LONGEST 0x00000400
#define XFS_AGF_BTREEBLKS 0x00000800
-#define XFS_AGF_NUM_BITS 12
+#define XFS_AGF_STATE 0x00001000
+#define XFS_AGF_NUM_BITS 13
#define XFS_AGF_ALL_BITS ((1 << XFS_AGF_NUM_BITS) - 1)
#define XFS_AGF_FLAGS \
@@ -98,7 +103,8 @@ typedef struct xfs_agf {
{ XFS_AGF_FLCOUNT, "FLCOUNT" }, \
{ XFS_AGF_FREEBLKS, "FREEBLKS" }, \
{ XFS_AGF_LONGEST, "LONGEST" }, \
- { XFS_AGF_BTREEBLKS, "BTREEBLKS" }
+ { XFS_AGF_BTREEBLKS, "BTREEBLKS" }, \
+ { XFS_AGF_STATE, "STATE" }
/* disk block (xfs_daddr_t) in the AG */
#define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log))
@@ -184,8 +190,8 @@ typedef struct xfs_agfl {
struct xfs_busy_extent {
#ifdef __KERNEL__
struct rb_node rb_node; /* ag by-bno indexed search tree */
-#endif
struct list_head list; /* transaction busy extent list */
+#endif
xfs_agnumber_t agno;
xfs_agblock_t bno;
xfs_extlen_t length;
@@ -197,7 +203,7 @@ struct xfs_busy_extent {
* to improve the performance of allocation group selection.
*/
#define XFS_PAGB_NUM_SLOTS 128
-
+typedef int atomic_t; /* to make compiler happy */
typedef struct xfs_perag {
struct xfs_mount *pag_mount; /* owner filesystem */
xfs_agnumber_t pag_agno; /* AG this structure belongs to */
@@ -243,9 +249,27 @@ typedef struct xfs_perag {
struct rcu_head rcu_head;
#endif
int pagb_count; /* pagb slots in use */
+ __uint32_t pag_state; /* persistent a.g. state */
} xfs_perag_t;
/*
+ * Structure for ioctl per a.g. state get/set.
+ */
+typedef struct xfs_ioc_agstate {
+ xfs_agnumber_t agno;
+ __uint32_t state;
+} xfs_ioc_agstate_t;
+
+/*
+ * Skip an AG with below state for inodes/blocks allocation.
+ */
+#define XFS_AG_STATE_ALLOC_DENY (1 << 0)
+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);
+
+/*
* tags for inode radix tree
*/
#define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup
diff --git a/include/xfs_fs.h b/include/xfs_fs.h
index faac5af..c749474 100644
--- a/include/xfs_fs.h
+++ b/include/xfs_fs.h
@@ -483,6 +483,8 @@ typedef struct xfs_handle {
#define XFS_IOC_ATTRMULTI_BY_HANDLE _IOW ('X', 123, struct xfs_fsop_attrmulti_handlereq)
#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 */
diff --git a/io/Makefile b/io/Makefile
index 50edf91..80a2817 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -9,7 +9,7 @@ LTCOMMAND = xfs_io
LSRCFILES = xfs_bmap.sh xfs_freeze.sh xfs_mkfile.sh
HFILES = init.h io.h
CFILES = init.c \
- attr.c bmap.c file.c freeze.c fsync.c getrusage.c imap.c mmap.c \
+ agstate.c attr.c bmap.c file.c freeze.c fsync.c getrusage.c imap.c mmap.c \
open.c parent.c pread.c prealloc.c pwrite.c shutdown.c truncate.c
LLDLIBS = $(LIBXCMD) $(LIBHANDLE)
diff --git a/io/init.c b/io/init.c
index fb93082..b81ca4f 100644
--- a/io/init.c
+++ b/io/init.c
@@ -54,6 +54,7 @@ init_cvtnum(
static void
init_commands(void)
{
+ agstate_init();
attr_init();
bmap_init();
fadvise_init();
--
1.7.9.5
_______________________________________________
xfs mailing list
xfs@xxxxxxxxxxx
http://oss.sgi.com/mailman/listinfo/xfs
