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fsstress: add copy_file_range support

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Support the copy_file_range syscall in fsstress.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Darrick J. Wong
2018-12-06 22:24:26 -08:00
committed by Eryu Guan
parent e7b6734822
commit 50fa944e89
5 changed files with 173 additions and 0 deletions
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configure.ac
+2
View File
@@ -68,6 +68,8 @@ AC_PACKAGE_WANT_OPEN_BY_HANDLE_AT
AC_PACKAGE_WANT_LINUX_PRCTL_H
AC_PACKAGE_WANT_LINUX_FS_H
AC_HAVE_COPY_FILE_RANGE
AC_CHECK_FUNCS([renameat2])
AC_CONFIG_HEADER(include/config.h)
include/builddefs.in
+1
View File
@@ -67,6 +67,7 @@ HAVE_DMAPI = @have_dmapi@
HAVE_ATTR_LIST = @have_attr_list@
HAVE_FIEMAP = @have_fiemap@
HAVE_FALLOCATE = @have_fallocate@
HAVE_COPY_FILE_RANGE = @have_copy_file_range@
GCCFLAGS = -funsigned-char -fno-strict-aliasing -Wall
ltp/Makefile
+4
View File
@@ -28,6 +28,10 @@ ifeq ($(HAVE_FALLOCATE), true)
LCFLAGS += -DFALLOCATE
endif
ifeq ($(HAVE_COPY_FILE_RANGE),yes)
LCFLAGS += -DHAVE_COPY_FILE_RANGE
endif
default: depend $(TARGETS)
depend: .dep
ltp/fsstress.c
+147
View File
@@ -26,6 +26,7 @@
#include <libaio.h>
io_context_t io_ctx;
#endif
#include <sys/syscall.h>
#ifndef FS_IOC_GETFLAGS
#define FS_IOC_GETFLAGS _IOR('f', 1, long)
@@ -55,6 +56,7 @@ typedef enum {
OP_BULKSTAT1,
OP_CHOWN,
OP_CLONERANGE,
OP_COPYRANGE,
OP_CREAT,
OP_DEDUPERANGE,
OP_DREAD,
@@ -163,6 +165,7 @@ void bulkstat_f(int, long);
void bulkstat1_f(int, long);
void chown_f(int, long);
void clonerange_f(int, long);
void copyrange_f(int, long);
void creat_f(int, long);
void deduperange_f(int, long);
void dread_f(int, long);
@@ -212,6 +215,7 @@ opdesc_t ops[] = {
{ OP_BULKSTAT1, "bulkstat1", bulkstat1_f, 1, 0 },
{ OP_CHOWN, "chown", chown_f, 3, 1 },
{ OP_CLONERANGE, "clonerange", clonerange_f, 4, 1 },
{ OP_COPYRANGE, "copyrange", copyrange_f, 4, 1 },
{ OP_CREAT, "creat", creat_f, 4, 1 },
{ OP_DEDUPERANGE, "deduperange", deduperange_f, 4, 1},
{ OP_DREAD, "dread", dread_f, 4, 0 },
@@ -2333,6 +2337,149 @@ out_fpath1:
#endif
}
/* copy some arbitrary range of f1 to f2. */
void
copyrange_f(
int opno,
long r)
{
#ifdef HAVE_COPY_FILE_RANGE
struct pathname fpath1;
struct pathname fpath2;
struct stat64 stat1;
struct stat64 stat2;
char inoinfo1[1024];
char inoinfo2[1024];
loff_t lr;
loff_t off1;
loff_t off2;
loff_t max_off2;
size_t len;
int tries = 0;
int v1;
int v2;
int fd1;
int fd2;
size_t ret;
int e;
/* Load paths */
init_pathname(&fpath1);
if (!get_fname(FT_REGm, r, &fpath1, NULL, NULL, &v1)) {
if (v1)
printf("%d/%d: copyrange read - no filename\n",
procid, opno);
goto out_fpath1;
}
init_pathname(&fpath2);
if (!get_fname(FT_REGm, random(), &fpath2, NULL, NULL, &v2)) {
if (v2)
printf("%d/%d: copyrange write - no filename\n",
procid, opno);
goto out_fpath2;
}
/* Open files */
fd1 = open_path(&fpath1, O_RDONLY);
e = fd1 < 0 ? errno : 0;
check_cwd();
if (fd1 < 0) {
if (v1)
printf("%d/%d: copyrange read - open %s failed %d\n",
procid, opno, fpath1.path, e);
goto out_fpath2;
}
fd2 = open_path(&fpath2, O_WRONLY);
e = fd2 < 0 ? errno : 0;
check_cwd();
if (fd2 < 0) {
if (v2)
printf("%d/%d: copyrange write - open %s failed %d\n",
procid, opno, fpath2.path, e);
goto out_fd1;
}
/* Get file stats */
if (fstat64(fd1, &stat1) < 0) {
if (v1)
printf("%d/%d: copyrange read - fstat64 %s failed %d\n",
procid, opno, fpath1.path, errno);
goto out_fd2;
}
inode_info(inoinfo1, sizeof(inoinfo1), &stat1, v1);
if (fstat64(fd2, &stat2) < 0) {
if (v2)
printf("%d/%d: copyrange write - fstat64 %s failed %d\n",
procid, opno, fpath2.path, errno);
goto out_fd2;
}
inode_info(inoinfo2, sizeof(inoinfo2), &stat2, v2);
/* Calculate offsets */
len = (random() % FILELEN_MAX) + 1;
if (len == 0)
len = stat1.st_blksize;
if (len > stat1.st_size)
len = stat1.st_size;
lr = ((int64_t)random() << 32) + random();
if (stat1.st_size == len)
off1 = 0;
else
off1 = (off64_t)(lr % MIN(stat1.st_size - len, MAXFSIZE));
off1 %= maxfsize;
/*
* If srcfile == destfile, randomly generate destination ranges
* until we find one that doesn't overlap the source range.
*/
max_off2 = MIN(stat2.st_size + (1024ULL * stat2.st_blksize), MAXFSIZE);
do {
lr = ((int64_t)random() << 32) + random();
off2 = (off64_t)(lr % max_off2);
off2 %= maxfsize;
} while (stat1.st_ino == stat2.st_ino && llabs(off2 - off1) < len);
while (len > 0) {
ret = syscall(__NR_copy_file_range, fd1, &off1, fd2, &off2,
len, 0);
if (ret < 0) {
if (errno != EAGAIN || tries++ >= 300)
break;
} else if (ret > len)
break;
else if (ret > 0)
len -= ret;
}
e = ret < 0 ? errno : 0;
if (v1 || v2) {
printf("%d/%d: copyrange %s%s [%lld,%lld] -> %s%s [%lld,%lld]",
procid, opno,
fpath1.path, inoinfo1, (long long)off1, (long long)len,
fpath2.path, inoinfo2, (long long)off2, (long long)len);
if (ret < 0)
printf(" error %d", e);
else if (len && ret > len)
printf(" asked for %lld, copied %lld??\n",
(long long)len, (long long)ret);
printf("\n");
}
out_fd2:
close(fd2);
out_fd1:
close(fd1);
out_fpath2:
free_pathname(&fpath2);
out_fpath1:
free_pathname(&fpath1);
#endif
}
/* dedupe some arbitrary range of f1 to f2...fn. */
void
deduperange_f(
m4/package_libcdev.m4
+19
View File
@@ -98,3 +98,22 @@ AC_DEFUN([AC_HAVE_GETMNTINFO],
AC_MSG_RESULT(no))
AC_SUBST(have_getmntinfo)
])
#
#
# Check if we have a copy_file_range system call (Linux)
#
AC_DEFUN([AC_HAVE_COPY_FILE_RANGE],
[ AC_MSG_CHECKING([for copy_file_range])
AC_TRY_LINK([
#define _GNU_SOURCE
#include <sys/syscall.h>
#include <unistd.h>
], [
syscall(__NR_copy_file_range, 0, 0, 0, 0, 0, 0);
], have_copy_file_range=yes
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))
AC_SUBST(have_copy_file_range)
])