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Date: Mon, 02 May 2011 14:35:37 -0500
From: Eric Sandeen <sandeen@...hat.com>
To: Allison Henderson <achender@...ux.vnet.ibm.com>
CC: linux-fsdevel <linux-fsdevel@...r.kernel.org>,
Ext4 Developers List <linux-ext4@...r.kernel.org>,
xfs-oss <xfs@....sgi.com>
Subject: Re: [XFS Punch Hole 1/1] XFS Add Punch Hole Testing to FSX
On 5/2/11 2:23 PM, Eric Sandeen wrote:
> On 5/2/11 2:16 PM, Allison Henderson wrote:
>> This patch adds punch hole tests to the fsx
>> stress test. The test is performed through
>> the fallocate call by randomly choosing to
>> use the punch hole flag when running the
>> fallocate test. Regions that have
>> been punched out should contain zeros, so
>> the expected file contents buffer is updated
>> to contain zeros when a hole is punched out.
>
> I'll cc: the xfs list since this would live in xfstests.
>
> Thanks,
> -Eric
>
>> Signed-off-by: Allison Henderson <achender@...ibm.com>
>> ---
>> :100644 100644 32cd380... d424941... M ltp/Makefile
>> :100644 100644 fe072d3... 4f54ef6... M ltp/fsx.c
>> ltp/Makefile | 2 +-
>> ltp/fsx.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++---------
>> 2 files changed, 62 insertions(+), 13 deletions(-)
>>
>> diff --git a/ltp/Makefile b/ltp/Makefile
>> index 32cd380..d424941 100644
>> --- a/ltp/Makefile
>> +++ b/ltp/Makefile
>> @@ -27,7 +27,7 @@ LCFLAGS += -DAIO
>> LLDLIBS += -laio -lpthread
>> endif
>>
>> -ifeq ($(HAVE_FALLOCATE), true)
>> +ifeq ($(HAVE_FALLOCATE), yes)
argh I ended up with 2 fallocate tests in aclocal.m4, need to tidy that up, I'll do that in a separate patch.
>> LCFLAGS += -DFALLOCATE
>> endif
>>
>> diff --git a/ltp/fsx.c b/ltp/fsx.c
>> index fe072d3..4f54ef6 100644
>> --- a/ltp/fsx.c
>> +++ b/ltp/fsx.c
>> @@ -207,7 +207,8 @@ logdump(void)
>> {
>> int i, count, down;
>> struct log_entry *lp;
>> - char *falloc_type[3] = {"PAST_EOF", "EXTENDING", "INTERIOR"};
>> + char *falloc_type[4] = {"PAST_EOF", "EXTENDING", "INTERIOR",
>> + "PUNCH_HOLE"};
>>
>> prt("LOG DUMP (%d total operations):\n", logcount);
>> if (logcount < LOGSIZE) {
>> @@ -791,7 +792,11 @@ dofallocate(unsigned offset, unsigned length)
>> {
>> unsigned end_offset;
>> int keep_size;
>> -
>> + int max_offset = 0;
>> + int max_len = 0;
>> + int punch_hole = 0;
>> + int mode = 0;
>> + char *op_name;
>> if (length == 0) {
>> if (!quiet && testcalls > simulatedopcount)
>> prt("skipping zero length fallocate\n");
>> @@ -799,11 +804,31 @@ dofallocate(unsigned offset, unsigned length)
>> return;
>> }
>>
>> +#ifdef FALLOC_FL_PUNCH_HOLE
>> + punch_hole = random() % 2;
>> + /* Keep size must be set for punch hole */
>> + if (punch_hole) {
>> + keep_size = 1;
>> + mode = FALLOC_FL_PUNCH_HOLE;
>> + } else
>> + keep_size = random() % 2;
>> +#else
>> keep_size = random() % 2;
>> +#endif
>> +
>> + if (keep_size)
>> + mode |= FALLOC_FL_KEEP_SIZE;
>> +
>> + if (punch_hole && file_size <= (loff_t)offset) {
>> + if (!quiet && testcalls > simulatedopcount)
>> + prt("skipping hole punch off the end of the file\n");
>> + log4(OP_SKIPPED, OP_FALLOCATE, offset, length);
>> + return;
>> + }
>>
>> end_offset = keep_size ? 0 : offset + length;
>>
>> - if (end_offset > biggest) {
>> + if ((end_offset > biggest) && !punch_hole) {
>> biggest = end_offset;
>> if (!quiet && testcalls > simulatedopcount)
>> prt("fallocating to largest ever: 0x%x\n", end_offset);
>> @@ -811,13 +836,15 @@ dofallocate(unsigned offset, unsigned length)
>>
>> /*
>> * last arg:
>> - * 1: allocate past EOF
>> - * 2: extending prealloc
>> - * 3: interior prealloc
>> + * 0: allocate past EOF
>> + * 1: extending prealloc
>> + * 2: interior prealloc
>> + * 3: punch hole
>> */
>> - log4(OP_FALLOCATE, offset, length, (end_offset > file_size) ? (keep_size ? 1 : 2) : 3);
>> + log4(OP_FALLOCATE, offset, length, punch_hole ? 3 :
>> + (end_offset > file_size) ? (keep_size ? 0 : 1) : 2);
>>
>> - if (end_offset > file_size) {
>> + if (((loff_t)end_offset > file_size) && !punch_hole) {
>> memset(good_buf + file_size, '\0', end_offset - file_size);
>> file_size = end_offset;
>> }
>> @@ -827,13 +854,35 @@ dofallocate(unsigned offset, unsigned length)
>>
>> if ((progressinterval && testcalls % progressinterval == 0) ||
>> (debug && (monitorstart == -1 || monitorend == -1 ||
>> - end_offset <= monitorend)))
>> - prt("%lu falloc\tfrom 0x%x to 0x%x\n", testcalls, offset, length);
>> - if (fallocate(fd, keep_size ? FALLOC_FL_KEEP_SIZE : 0, (loff_t)offset, (loff_t)length) == -1) {
>> - prt("fallocate: %x to %x\n", offset, length);
>> + end_offset <= monitorend))) {
>> +#ifdef FALLOC_FL_PUNCH_HOLE
>> + op_name = (mode & FALLOC_FL_PUNCH_HOLE) ?
>> + "punch hole" : "falloc";
>> +#else
>> + op_name = "falloc";
>> +#endif
>> + prt("%lu %s\tfrom 0x%x to 0x%x, (0x%x bytes)\n", testcalls,
>> + op_name, offset, offset+length, length);
>> + }
>> + if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
>> +#ifdef FALLOC_FL_PUNCH_HOLE
>> + op_name = (mode & FALLOC_FL_PUNCH_HOLE) ?
>> + "punch hole" : "fallocate";
>> +#else
>> + op_name = "fallocate";
>> +#endif
>> +
>> + prt("%s: %x to %x\n", op_name, offset, length);
>> prterr("dofallocate: fallocate");
>> report_failure(161);
>> }
>> +
>> + if (punch_hole) {
>> + max_offset = offset < file_size ? offset : file_size;
>> + max_len = max_offset + length <= file_size ? length :
>> + file_size - max_offset;
>> + memset(good_buf + max_offset, '\0', max_len);
>> + }
>> }
>> #else
>> void
>
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