From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Add support for the dedupe range ioctl to fsx.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
ltp/fsx.c | 198 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 196 insertions(+), 2 deletions(-)
diff --git a/ltp/fsx.c b/ltp/fsx.c
index f51d38cf..577c7309 100644
--- a/ltp/fsx.c
+++ b/ltp/fsx.c
@@ -105,6 +105,7 @@ enum {
OP_COLLAPSE_RANGE,
OP_INSERT_RANGE,
OP_CLONE_RANGE,
+ OP_DEDUPE_RANGE,
OP_MAX_FULL,
/* integrity operations */
@@ -167,6 +168,7 @@ int insert_range_calls = 1; /* -I flag disables */
int mapped_reads = 1; /* -R flag disables it */
int check_file = 0; /* -X flag enables */
int clone_range_calls = 1; /* -J flag disables */
+int dedupe_range_calls = 1; /* -B flag disables */
int integrity = 0; /* -i flag */
int fsxgoodfd = 0;
int o_direct; /* -Z */
@@ -261,6 +263,7 @@ 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",
};
@@ -460,6 +463,20 @@ logdump(void)
else if (overlap2)
prt("\t******JJJJ");
break;
+ case OP_DEDUPE_RANGE:
+ prt("DEDUPE 0x%x thru 0x%x\t(0x%x bytes) to 0x%x thru 0x%x",
+ lp->args[0], lp->args[0] + lp->args[1] - 1,
+ lp->args[1],
+ lp->args[2], lp->args[2] + lp->args[1] - 1);
+ overlap2 = badoff >= lp->args[2] &&
+ badoff < lp->args[2] + lp->args[1];
+ if (overlap && overlap2)
+ prt("\tBBBB**BBBB");
+ else if (overlap)
+ prt("\tBBBB******");
+ else if (overlap2)
+ prt("\t******BBBB");
+ break;
case OP_FSYNC:
prt("FSYNC");
break;
@@ -1391,6 +1408,137 @@ do_clone_range(unsigned offset, unsigned length, unsigned dest)
}
#endif
+#ifdef FIDEDUPERANGE
+int
+test_dedupe_range(void)
+{
+ struct file_dedupe_range *fdr;
+ off_t new_len;
+ int error;
+ int ret = 1;
+
+ /* Alloc memory */
+ fdr = calloc(sizeof(struct file_dedupe_range_info) +
+ sizeof(struct file_dedupe_range), 1);
+ if (!fdr) {
+ prterr("do_dedupe_range: malloc");
+ report_failure(161);
+ }
+
+ /* Make sure we have at least two blocks */
+ new_len = block_size * 2;
+ if (file_size < new_len && ftruncate(fd, new_len)) {
+ warn("main: ftruncate");
+ exit(132);
+ }
+
+ /* Try to dedupe them */
+ fdr->src_length = block_size;
+ fdr->dest_count = 1;
+ fdr->info[0].dest_fd = fd;
+ fdr->info[0].dest_offset = block_size;
+
+ if (ioctl(fd, FIDEDUPERANGE, fdr))
+ error = errno;
+ else if (fdr->info[0].status < 0)
+ error = -fdr->info[0].status;
+ else
+ error = 0;
+
+ if (error == EOPNOTSUPP || error == ENOTTY) {
+ if (!quiet)
+ fprintf(stderr,
+ "main: filesystem does not support "
+ "dedupe range, disabling!\n");
+ ret = 0;
+ }
+
+ /* Put the file back the way it was. */
+ if (file_size < new_len && ftruncate(fd, file_size)) {
+ warn("main: ftruncate");
+ exit(132);
+ }
+
+ free(fdr);
+ return ret;
+}
+
+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 = calloc(sizeof(struct file_dedupe_range_info) +
+ sizeof(struct file_dedupe_range), 1);
+ if (!fdr) {
+ prterr("do_dedupe_range: malloc");
+ report_failure(161);
+ }
+
+ /* 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) {
+ prt("dedupe range: 0x%x to 0x%x at 0x%x\n", offset,
+ offset + length, dest);
+ prterr("do_dedupe_range(0): FIDEDUPERANGE");
+ report_failure(161);
+ } else if (fdr->info[0].status < 0) {
+ errno = -fdr->info[0].status;
+ prt("dedupe range: 0x%x to 0x%x at 0x%x\n", offset,
+ offset + length, dest);
+ prterr("do_dedupe_range(1): FIDEDUPERANGE");
+ report_failure(161);
+ }
+
+ free(fdr);
+}
+
+#else
+int
+test_dedupe_range(void)
+{
+ return 0;
+}
+
+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
@@ -1549,6 +1697,7 @@ op_args_count(int operation)
{
switch (operation) {
case OP_CLONE_RANGE:
+ case OP_DEDUPE_RANGE:
return 4;
default:
return 3;
@@ -1704,6 +1853,25 @@ 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:
@@ -1753,6 +1921,12 @@ test(void)
goto out;
}
break;
+ case OP_DEDUPE_RANGE:
+ if (!dedupe_range_calls) {
+ log5(op, offset, size, offset2, FL_SKIPPED);
+ goto out;
+ }
+ break;
}
switch (op) {
@@ -1831,6 +2005,18 @@ 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;
@@ -1856,7 +2042,7 @@ void
usage(void)
{
fprintf(stdout, "usage: %s",
- "fsx [-dknqxAFJLOWZ] [-b opnum] [-c Prob] [-g filldata] [-i logdev] [-j logid] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\
+ "fsx [-dknqxABFJLOWZ] [-b opnum] [-c Prob] [-g filldata] [-i logdev] [-j logid] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\
-b opnum: beginning operation number (default 1)\n\
-c P: 1 in P chance of file close+open at each op (default infinity)\n\
-d: debug output for all operations\n\
@@ -1900,6 +2086,9 @@ usage(void)
#ifdef FICLONERANGE
" -J: Do not use clone range calls\n"
#endif
+#ifdef FIDEDUPERANGE
+" -B: Do not use dedupe range calls\n"
+#endif
" -L: fsxLite - no file creations & no file size changes\n\
-N numops: total # operations to do (default infinity)\n\
-O: use oplen (see -o flag) for every op (default random)\n\
@@ -2103,7 +2292,7 @@ main(int argc, char **argv)
setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
while ((ch = getopt_long(argc, argv,
- "b:c:dfg:i:j:kl:m:no:p:qr:s:t:w:xyAD:FJKHzCILN:OP:RS:WXZ",
+ "b:c:dfg:i:j:kl:m:no:p:qr:s:t:w:xyABD:FJKHzCILN:OP:RS:WXZ",
longopts, NULL)) != EOF)
switch (ch) {
case 'b':
@@ -2236,6 +2425,9 @@ main(int argc, char **argv)
case 'J':
clone_range_calls = 0;
break;
+ case 'B':
+ dedupe_range_calls = 0;
+ break;
case 'L':
lite = 1;
o_flags &= ~(O_CREAT|O_TRUNC);
@@ -2456,6 +2648,8 @@ main(int argc, char **argv)
insert_range_calls = test_fallocate(FALLOC_FL_INSERT_RANGE);
if (clone_range_calls)
clone_range_calls = test_clone_range();
+ if (dedupe_range_calls)
+ dedupe_range_calls = test_dedupe_range();
while (numops == -1 || numops--)
if (!test())
