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authorNamjae Jeon <namjae.jeon@samsung.com>2015-06-09 01:55:03 -0400
committerTheodore Ts'o <tytso@mit.edu>2015-06-09 01:55:03 -0400
commit331573febb6a224bc50322e3670da326cb7f4cfc (patch)
treea302585d04479bea70f2c60371ff40d57db0f699 /include/trace
parentde92c8caf16ca84926fa31b7a5590c0fb9c0d5ca (diff)
downloadop-kernel-dev-331573febb6a224bc50322e3670da326cb7f4cfc.zip
op-kernel-dev-331573febb6a224bc50322e3670da326cb7f4cfc.tar.gz
ext4: Add support FALLOC_FL_INSERT_RANGE for fallocate
This patch implements fallocate's FALLOC_FL_INSERT_RANGE for Ext4. 1) Make sure that both offset and len are block size aligned. 2) Update the i_size of inode by len bytes. 3) Compute the file's logical block number against offset. If the computed block number is not the starting block of the extent, split the extent such that the block number is the starting block of the extent. 4) Shift all the extents which are lying between [offset, last allocated extent] towards right by len bytes. This step will make a hole of len bytes at offset. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/ext4.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 08ec3dd..0faf570 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -2478,6 +2478,31 @@ TRACE_EVENT(ext4_collapse_range,
__entry->offset, __entry->len)
);
+TRACE_EVENT(ext4_insert_range,
+ 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_es_shrink,
TP_PROTO(struct super_block *sb, int nr_shrunk, u64 scan_time,
int nr_skipped, int retried),
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