[PATCH 2/6] fsx: add FIDEDUPERANGE support

Darrick J. Wong
2018-11-14T09:40:32Z

From: Darrick J. Wong <darrick.wong@oracle.com>

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
ltp/fsx.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 117 insertions(+)

diff --git a/ltp/fsx.c b/ltp/fsx.c
index 2b0a2b28..6f2b3364 100644
--- a/ltp/fsx.c
+++ b/ltp/fsx.c
@@ -104,6 +104,7 @@ enum {
OP_COLLAPSE_RANGE,
OP_INSERT_RANGE,
OP_CLONE_RANGE,
+ OP_DEDUPE_RANGE,
OP_MAX_FULL,

/* integrity operations */
@@ -259,6 +260,7 @@ static const char *op_names[] = {
[OP_COLLAPSE_RANGE] = "collapse_range",
[OP_INSERT_RANGE] = "insert_range",
[OP_CLONE_RANGE] = "clone_range",
+ [OP_DEDUPE_RANGE] = "dedupe_range",
[OP_FSYNC] = "fsync",
};

@@ -448,6 +450,13 @@ logdump(void)
if (overlap)
prt("\t******IIII");
break;
+ case OP_DEDUPE_RANGE:
+ prt("DEDUPE 0x%x thru 0x%x\t(0x%x bytes) to 0x%x",
+ lp->args[0], lp->args[0] + lp->args[1] - 1,
+ lp->args[1], lp->args[2]);
+ if (overlap)
+ prt("\t******IIII");
+ break;
case OP_FSYNC:
prt("FSYNC");
break;
@@ -1315,6 +1324,82 @@ do_clone_range(unsigned offset, unsigned length, unsigned dest)
}
#endif

+#ifdef FIDEDUPERANGE
+void
+do_dedupe_range(unsigned offset, unsigned length, unsigned dest)
+{
+ struct file_dedupe_range *fdr;
+
+ if (length == 0) {
+ if (!quiet && testcalls > simulatedopcount)
+ prt("skipping zero length dedupe range\n");
+ log5(OP_DEDUPE_RANGE, offset, length, dest, FL_SKIPPED);
+ return;
+ }
+
+ if ((loff_t)offset >= file_size) {
+ if (!quiet && testcalls > simulatedopcount)
+ prt("skipping dedupe range behind EOF\n");
+ log5(OP_DEDUPE_RANGE, offset, length, dest, FL_SKIPPED);
+ return;
+ }
+
+ log5(OP_DEDUPE_RANGE, offset, length, dest, FL_NONE);
+
+ if (testcalls <= simulatedopcount)
+ return;
+
+ if ((progressinterval && testcalls % progressinterval == 0) ||
+ (debug && (monitorstart == -1 || monitorend == -1 ||
+ dest <= monitorstart || dest + length <= monitorend))) {
+ prt("%lu dedupe\tfrom 0x%x to 0x%x, (0x%x bytes) at 0x%x\n",
+ testcalls, offset, offset+length, length, dest);
+ }
+
+ /* Alloc memory */
+ fdr = malloc(sizeof(struct file_dedupe_range_info) +
+ sizeof(struct file_dedupe_range));
+ if (!fdr) {
+ prterr("do_dedupe_range: malloc");
+ report_failure(161);
+ }
+ memset(fdr, 0, (sizeof(struct file_dedupe_range_info) +
+ sizeof(struct file_dedupe_range)));
+
+ /* Dedupe data blocks */
+ fdr->src_offset = offset;
+ fdr->src_length = length;
+ fdr->dest_count = 1;
+ fdr->info[0].dest_fd = fd;
+ fdr->info[0].dest_offset = dest;
+
+ if (ioctl(fd, FIDEDUPERANGE, fdr) == -1) {
+ if (errno == EOPNOTSUPP || errno == ENOTTY) {
+ if (!quiet && testcalls > simulatedopcount)
+ prt("skipping unsupported dedupe range\n");
+ logptr--;
+ log5(OP_DEDUPE_RANGE, offset, length, dest, FL_SKIPPED);
+ free(fdr);
+ return;
+ }
+
+ prt("dedupe range: 0x%x to 0x%x at 0x%x\n", offset,
+ offset + length, dest);
+ prterr("do_dedupe_range: FIDEDUPERANGE");
+ report_failure(161);
+ }
+
+ free(fdr);
+}
+
+#else
+void
+do_dedupe_range(unsigned offset, unsigned length, unsigned dest)
+{
+ return;
+}
+#endif
+
#ifdef HAVE_LINUX_FALLOC_H
/* fallocate is basically a no-op unless extending, then a lot like a truncate */
void
@@ -1615,6 +1700,25 @@ test(void)
} while (llabs(offset2 - offset) < size ||
offset2 + size > maxfilelen);
break;
+ case OP_DEDUPE_RANGE:
+ {
+ int tries = 0;
+
+ TRIM_OFF_LEN(offset, size, file_size);
+ offset = offset & ~(block_size - 1);
+ size = size & ~(block_size - 1);
+ do {
+ if (tries++ >= 30) {
+ size = 0;
+ break;
+ }
+ offset2 = random();
+ TRIM_OFF(offset2, file_size);
+ offset2 = offset2 & ~(block_size - 1);
+ } while (llabs(offset2 - offset) < size ||
+ offset2 + size > file_size);
+ break;
+ }
}

have_op:
@@ -1659,6 +1763,7 @@ test(void)
}
break;
case OP_CLONE_RANGE:
+ case OP_DEDUPE_RANGE:
if (!remap_calls) {
log5(op, offset, size, offset2, FL_SKIPPED);
goto out;
@@ -1742,6 +1847,18 @@ test(void)

do_clone_range(offset, size, offset2);
break;
+ case OP_DEDUPE_RANGE:
+ if (size == 0) {
+ log5(OP_DEDUPE_RANGE, offset, size, offset2, FL_SKIPPED);
+ goto out;
+ }
+ if (offset2 + size > maxfilelen) {
+ log5(OP_DEDUPE_RANGE, offset, size, offset2, FL_SKIPPED);
+ goto out;
+ }
+
+ do_dedupe_range(offset, size, offset2);
+ break;
case OP_FSYNC:
dofsync();
break;