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authorLukas Czerner <lczerner@redhat.com>2014-03-18 18:05:35 -0400
committerTheodore Ts'o <tytso@mit.edu>2014-03-18 18:05:35 -0400
commitb8a8684502a0fc852afa0056c6bb2a9273f6fcc0 (patch)
tree3b7c2058c86f5247a31e02e1a04182c40775e268 /include/trace
parent0e8b6879f3c234036181526683be2b0231892ae4 (diff)
ext4: Introduce FALLOC_FL_ZERO_RANGE flag for fallocate
Introduce new FALLOC_FL_ZERO_RANGE flag for fallocate. This has the same functionality as xfs ioctl XFS_IOC_ZERO_RANGE. It can be used to convert a range of file to zeros preferably without issuing data IO. Blocks should be preallocated for the regions that span holes in the file, and the entire range is preferable converted to unwritten extents This can be also used to preallocate blocks past EOF in the same way as with fallocate. Flag FALLOC_FL_KEEP_SIZE which should cause the inode size to remain the same. Also add appropriate tracepoints. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/ext4.h68
1 files changed, 35 insertions, 33 deletions
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index e9d7ee77d3a1..010ea89eeb0e 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -21,6 +21,10 @@ struct extent_status;
#define FALLOC_FL_COLLAPSE_RANGE 0x08
#endif
+#ifndef FALLOC_FL_ZERO_RANGE
+#define FALLOC_FL_ZERO_RANGE 0x10
+#endif
+
#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
#define show_mballoc_flags(flags) __print_flags(flags, "|", \
@@ -77,7 +81,8 @@ struct extent_status;
{ FALLOC_FL_KEEP_SIZE, "KEEP_SIZE"}, \
{ FALLOC_FL_PUNCH_HOLE, "PUNCH_HOLE"}, \
{ FALLOC_FL_NO_HIDE_STALE, "NO_HIDE_STALE"}, \
- { FALLOC_FL_COLLAPSE_RANGE, "COLLAPSE_RANGE"})
+ { FALLOC_FL_COLLAPSE_RANGE, "COLLAPSE_RANGE"}, \
+ { FALLOC_FL_ZERO_RANGE, "ZERO_RANGE"})
TRACE_EVENT(ext4_free_inode,
@@ -1339,7 +1344,7 @@ TRACE_EVENT(ext4_direct_IO_exit,
__entry->rw, __entry->ret)
);
-TRACE_EVENT(ext4_fallocate_enter,
+DECLARE_EVENT_CLASS(ext4__fallocate_mode,
TP_PROTO(struct inode *inode, loff_t offset, loff_t len, int mode),
TP_ARGS(inode, offset, len, mode),
@@ -1347,23 +1352,45 @@ TRACE_EVENT(ext4_fallocate_enter,
TP_STRUCT__entry(
__field( dev_t, dev )
__field( ino_t, ino )
- __field( loff_t, pos )
- __field( loff_t, len )
+ __field( loff_t, offset )
+ __field( loff_t, len )
__field( int, mode )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
- __entry->pos = offset;
+ __entry->offset = offset;
__entry->len = len;
__entry->mode = mode;
),
- TP_printk("dev %d,%d ino %lu pos %lld len %lld mode %s",
+ TP_printk("dev %d,%d ino %lu offset %lld len %lld mode %s",
MAJOR(__entry->dev), MINOR(__entry->dev),
- (unsigned long) __entry->ino, __entry->pos,
- __entry->len, show_falloc_mode(__entry->mode))
+ (unsigned long) __entry->ino,
+ __entry->offset, __entry->len,
+ show_falloc_mode(__entry->mode))
+);
+
+DEFINE_EVENT(ext4__fallocate_mode, ext4_fallocate_enter,
+
+ TP_PROTO(struct inode *inode, loff_t offset, loff_t len, int mode),
+
+ TP_ARGS(inode, offset, len, mode)
+);
+
+DEFINE_EVENT(ext4__fallocate_mode, ext4_punch_hole,
+
+ TP_PROTO(struct inode *inode, loff_t offset, loff_t len, int mode),
+
+ TP_ARGS(inode, offset, len, mode)
+);
+
+DEFINE_EVENT(ext4__fallocate_mode, ext4_zero_range,
+
+ TP_PROTO(struct inode *inode, loff_t offset, loff_t len, int mode),
+
+ TP_ARGS(inode, offset, len, mode)
);
TRACE_EVENT(ext4_fallocate_exit,
@@ -1395,31 +1422,6 @@ TRACE_EVENT(ext4_fallocate_exit,
__entry->ret)
);
-TRACE_EVENT(ext4_punch_hole,
- TP_PROTO(struct inode *inode, loff_t offset, loff_t len),
-
- TP_ARGS(inode, offset, len),
-
- TP_STRUCT__entry(
- __field( dev_t, dev )
- __field( ino_t, ino )
- __field( loff_t, offset )
- __field( loff_t, len )
- ),
-
- TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
- __entry->ino = inode->i_ino;
- __entry->offset = offset;
- __entry->len = len;
- ),
-
- TP_printk("dev %d,%d ino %lu offset %lld len %lld",
- MAJOR(__entry->dev), MINOR(__entry->dev),
- (unsigned long) __entry->ino,
- __entry->offset, __entry->len)
-);
-
TRACE_EVENT(ext4_unlink_enter,
TP_PROTO(struct inode *parent, struct dentry *dentry),