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Date: Fri, 28 Feb 2014 12:11:47 -0600
From: Eric Sandeen <sandeen@...hat.com>
To: Lukas Czerner <lczerner@...hat.com>, linux-ext4@...r.kernel.org
CC: xfs@....sgi.com, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 7/8] xfstests: Add fallocate zero range operation to fsx
On 2/28/14, 10:11 AM, Lukas Czerner wrote:
> This commit adds fallocate FALLOC_FL_ZERO_RANGE support for fsx.
and reworks/consolidates testing of which fallocate ops are available.
Couple things below
> Signed-off-by: Lukas Czerner <lczerner@...hat.com>
> ---
> ltp/fsx.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++---------------
> 1 file changed, 98 insertions(+), 30 deletions(-)
>
> diff --git a/ltp/fsx.c b/ltp/fsx.c
> index c36a038..5d6d198 100644
> --- a/ltp/fsx.c
> +++ b/ltp/fsx.c
> @@ -69,6 +69,7 @@ int logcount = 0; /* total ops */
> * TRUNCATE: - 4
> * FALLOCATE: - 5
> * PUNCH HOLE: - 6
> + * ZERO RANGE: - 7
> *
> * When mapped read/writes are disabled, they are simply converted to normal
> * reads and writes. When fallocate/fpunch calls are disabled, they are
> @@ -92,7 +93,8 @@ int logcount = 0; /* total ops */
> #define OP_TRUNCATE 4
> #define OP_FALLOCATE 5
> #define OP_PUNCH_HOLE 6
> -#define OP_MAX_FULL 7
> +#define OP_ZERO_RANGE 7
> +#define OP_MAX_FULL 8
>
> /* operation modifiers */
> #define OP_CLOSEOPEN 100
> @@ -139,6 +141,7 @@ int seed = 1; /* -S flag */
> int mapped_writes = 1; /* -W flag disables */
> int fallocate_calls = 1; /* -F flag disables */
> int punch_hole_calls = 1; /* -H flag disables */
> +int zero_range_calls = 1; /* -z flag disables */
> int mapped_reads = 1; /* -R flag disables it */
> int fsxgoodfd = 0;
> int o_direct; /* -Z */
> @@ -317,6 +320,14 @@ logdump(void)
> lp->args[0] + lp->args[1])
> prt("\t******PPPP");
> break;
> + case OP_ZERO_RANGE:
> + prt("ZERO 0x%x thru 0x%x\t(0x%x bytes)",
> + lp->args[0], lp->args[0] + lp->args[1] - 1,
> + lp->args[1]);
> + if (badoff >= lp->args[0] && badoff <
> + lp->args[0] + lp->args[1])
> + prt("\t******ZZZZ");
> + break;
> case OP_SKIPPED:
> prt("SKIPPED (no operation)");
> break;
> @@ -879,6 +890,65 @@ do_punch_hole(unsigned offset, unsigned length)
> }
> #endif
>
> +#ifdef FALLOC_FL_ZERO_RANGE
> +void
> +do_zero_range(unsigned offset, unsigned length)
> +{
> + unsigned end_offset;
> + int mode = FALLOC_FL_ZERO_RANGE;
> + int keep_size;
> +
> + if (length == 0) {
> + if (!quiet && testcalls > simulatedopcount)
> + prt("skipping zero length zero range\n");
> + log4(OP_SKIPPED, OP_ZERO_RANGE, offset, length);
> + return;
> + }
> +
> + keep_size = random() % 2;
> +
> + end_offset = keep_size ? 0 : offset + length;
> +
> + if (end_offset > biggest) {
> + biggest = end_offset;
> + if (!quiet && testcalls > simulatedopcount)
> + prt("zero_range to largest ever: 0x%x\n", end_offset);
> + }
> +
> + /*
> + * last arg matches fallocate string array index in logdump:
> + * 0: allocate past EOF
> + * 1: extending prealloc
> + * 2: interior prealloc
> + */
> + log4(OP_ZERO_RANGE, offset, length, (end_offset > file_size) ? (keep_size ? 0 : 1) : 2);
> +
> + if (testcalls <= simulatedopcount)
> + return;
> +
> + if ((progressinterval && testcalls % progressinterval == 0) ||
> + (debug && (monitorstart == -1 || monitorend == -1 ||
> + end_offset <= monitorend))) {
> + prt("%lu zero\tfrom 0x%x to 0x%x, (0x%x bytes)\n", testcalls,
> + offset, offset+length, length);
> + }
> + if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
> + prt("%pzero range: %x to %x\n", offset, length);
> + prterr("do_zero_range: fallocate");
> + report_failure(161);
This "161" isn't unique; do_punch_hole and do_preallocate both use the same number.
Is that ok? I guess there are other dups too, different bug (which probably
nobody cares much about) ;)
> + }
> +
> + memset(good_buf + offset, '\0', length);
> +}
> +
> +#else
> +void
> +do_zero_range(unsigned offset, unsigned length)
> +{
> + return;
> +}
> +#endif
> +
> #ifdef HAVE_LINUX_FALLOC_H
> /* fallocate is basically a no-op unless extending, then a lot like a truncate */
> void
> @@ -1047,6 +1117,12 @@ test(void)
> goto out;
> }
> break;
> + case OP_ZERO_RANGE:
> + if (!zero_range_calls) {
> + log4(OP_SKIPPED, OP_ZERO_RANGE, offset, size);
> + goto out;
> + }
> + break;
> }
>
> switch (op) {
> @@ -1085,6 +1161,10 @@ test(void)
> TRIM_OFF_LEN(offset, size, file_size);
> do_punch_hole(offset, size);
> break;
> + case OP_ZERO_RANGE:
> + TRIM_OFF_LEN(offset, size, file_size);
> + do_zero_range(offset, size);
> + break;
> default:
> prterr("test: unknown operation");
> report_failure(42);
> @@ -1140,7 +1220,10 @@ usage(void)
> " -F: Do not use fallocate (preallocation) calls\n"
> #endif
> #ifdef FALLOC_FL_PUNCH_HOLE
> -" -H: Do not use punch hole calls\n"
> +" -H: Do not use punch hole calls\n"
> +#endif
> +#ifdef FALLOC_FL_ZERO_RANGE
> +" -E: Do not use zero range calls\n"
> #endif
> " -L: fsxLite - no file creations & no file size changes\n\
> -N numops: total # operations to do (default infinity)\n\
> @@ -1290,40 +1373,21 @@ int aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset)
>
> #endif
>
> -void
> -test_fallocate()
> +int
> +test_fallocate(int mode)
> {
> #ifdef HAVE_LINUX_FALLOC_H
> + int ret = 0;
> if (!lite && fallocate_calls) {
> - if (fallocate(fd, 0, 0, 1) && errno == EOPNOTSUPP) {
> + if (fallocate(fd, mode, 0, 1) && errno == EOPNOTSUPP) {
> if(!quiet)
> warn("main: filesystem does not support fallocate, disabling\n");
we've lost which mode isn't supported, now. Maybe you should print the
flags which didn't pass? Too bad your fancy flag stuff is in fsstress.c. ;)
or do ("does not support fallocate mode 0x%x", mode) ?
> - fallocate_calls = 0;
> } else {
> + ret = 1;
> ftruncate(fd, 0);
> }
> }
> -#else /* ! HAVE_LINUX_FALLOC_H */
> - fallocate_calls = 0;
> -#endif
> -
> -}
> -
> -void
> -test_punch_hole()
> -{
> -#ifdef FALLOC_FL_PUNCH_HOLE
> - if (!lite && punch_hole_calls) {
> - if (fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
> - 0, 1) && errno == EOPNOTSUPP) {
> - if(!quiet)
> - warn("main: filesystem does not support fallocate punch hole, disabling");
> - punch_hole_calls = 0;
> - } else
> - ftruncate(fd, 0);
> - }
> -#else /* ! PUNCH HOLE */
> - punch_hole_calls = 0;
> + return ret;
> #endif
> }
>
> @@ -1345,7 +1409,7 @@ main(int argc, char **argv)
>
> setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
>
> - while ((ch = getopt(argc, argv, "b:c:dfl:m:no:p:qr:s:t:w:xyAD:FHLN:OP:RS:WZ"))
> + while ((ch = getopt(argc, argv, "b:c:dfl:m:no:p:qr:s:t:w:xyAD:FHzLN:OP:RS:WZ"))
> != EOF)
> switch (ch) {
> case 'b':
> @@ -1445,6 +1509,9 @@ main(int argc, char **argv)
> case 'H':
> punch_hole_calls = 0;
> break;
> + case 'z':
> + zero_range_calls = 0;
> + break;
> case 'L':
> lite = 1;
> break;
> @@ -1590,8 +1657,9 @@ main(int argc, char **argv)
> } else
> check_trunc_hack();
>
> - test_fallocate();
> - test_punch_hole();
> + fallocate_calls = test_fallocate(0);
> + punch_hole_calls = test_fallocate(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
> + zero_range_calls = test_fallocate(FALLOC_FL_ZERO_RANGE);
Could probably add the do_warn() stuff here, explicitly stating what got disabled.
-Eric
>
> while (numops == -1 || numops--)
> test();
>
--
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