ext4: support GETFSMAP ioctls
Support the GETFSMAP ioctls so that we can use the xfs free space
management tools to probe ext4 as well. Note that this is a partial
implementation -- we only report fixed-location metadata and free space;
everything else is reported as "unknown".
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 09c71e9..dfae175 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -15,6 +15,7 @@
struct mpage_da_data;
struct ext4_map_blocks;
struct extent_status;
+struct ext4_fsmap;
#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
@@ -2529,6 +2530,79 @@
__entry->scan_time, __entry->nr_skipped, __entry->retried)
);
+/* fsmap traces */
+DECLARE_EVENT_CLASS(ext4_fsmap_class,
+ TP_PROTO(struct super_block *sb, u32 keydev, u32 agno, u64 bno, u64 len,
+ u64 owner),
+ TP_ARGS(sb, keydev, agno, bno, len, owner),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(dev_t, keydev)
+ __field(u32, agno)
+ __field(u64, bno)
+ __field(u64, len)
+ __field(u64, owner)
+ ),
+ TP_fast_assign(
+ __entry->dev = sb->s_bdev->bd_dev;
+ __entry->keydev = new_decode_dev(keydev);
+ __entry->agno = agno;
+ __entry->bno = bno;
+ __entry->len = len;
+ __entry->owner = owner;
+ ),
+ TP_printk("dev %d:%d keydev %d:%d agno %u bno %llu len %llu owner %lld\n",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ MAJOR(__entry->keydev), MINOR(__entry->keydev),
+ __entry->agno,
+ __entry->bno,
+ __entry->len,
+ __entry->owner)
+)
+#define DEFINE_FSMAP_EVENT(name) \
+DEFINE_EVENT(ext4_fsmap_class, name, \
+ TP_PROTO(struct super_block *sb, u32 keydev, u32 agno, u64 bno, u64 len, \
+ u64 owner), \
+ TP_ARGS(sb, keydev, agno, bno, len, owner))
+DEFINE_FSMAP_EVENT(ext4_fsmap_low_key);
+DEFINE_FSMAP_EVENT(ext4_fsmap_high_key);
+DEFINE_FSMAP_EVENT(ext4_fsmap_mapping);
+
+DECLARE_EVENT_CLASS(ext4_getfsmap_class,
+ TP_PROTO(struct super_block *sb, struct ext4_fsmap *fsmap),
+ TP_ARGS(sb, fsmap),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(dev_t, keydev)
+ __field(u64, block)
+ __field(u64, len)
+ __field(u64, owner)
+ __field(u64, flags)
+ ),
+ TP_fast_assign(
+ __entry->dev = sb->s_bdev->bd_dev;
+ __entry->keydev = new_decode_dev(fsmap->fmr_device);
+ __entry->block = fsmap->fmr_physical;
+ __entry->len = fsmap->fmr_length;
+ __entry->owner = fsmap->fmr_owner;
+ __entry->flags = fsmap->fmr_flags;
+ ),
+ TP_printk("dev %d:%d keydev %d:%d block %llu len %llu owner %lld flags 0x%llx\n",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ MAJOR(__entry->keydev), MINOR(__entry->keydev),
+ __entry->block,
+ __entry->len,
+ __entry->owner,
+ __entry->flags)
+)
+#define DEFINE_GETFSMAP_EVENT(name) \
+DEFINE_EVENT(ext4_getfsmap_class, name, \
+ TP_PROTO(struct super_block *sb, struct ext4_fsmap *fsmap), \
+ TP_ARGS(sb, fsmap))
+DEFINE_GETFSMAP_EVENT(ext4_getfsmap_low_key);
+DEFINE_GETFSMAP_EVENT(ext4_getfsmap_high_key);
+DEFINE_GETFSMAP_EVENT(ext4_getfsmap_mapping);
+
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */