From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com ([209.132.183.28]:33630 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750725AbdCSEU6 (ORCPT ); Sun, 19 Mar 2017 00:20:58 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B1828437F44 for ; Sun, 19 Mar 2017 04:20:58 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-8-27.pek2.redhat.com [10.72.8.27]) by smtp.corp.redhat.com (Postfix) with ESMTP id C14F018BA1 for ; Sun, 19 Mar 2017 04:20:57 +0000 (UTC) From: Zorro Lang Subject: [PATCH v4] fsstress: add mwrite/mread into test operation list Date: Sun, 19 Mar 2017 12:20:46 +0800 Message-Id: <1489897246-11275-1-git-send-email-zlang@redhat.com> Sender: fstests-owner@vger.kernel.org To: fstests@vger.kernel.org List-ID: mmap as a popular and basic operation, most of softwares use it to access files. More and more customers report bugs related with mmap/munmap and other stress conditions. So add mmap read/write test into fsstress to increase mmap related stress to reproduce or find more bugs easily. Signed-off-by: Zorro Lang --- Hi, According to Amir's suggestions: V3 change mmap_f to mwrite_f and mread_f V4 make sure mread and mwrite are sorted alphabetically in fsstress I found I set "is_write" of mread to 1, so change it to 0 in V4. Hope to get more review. Thanks, Zorro ltp/fsstress.c | 187 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/global.h | 4 ++ 2 files changed, 191 insertions(+) diff --git a/ltp/fsstress.c b/ltp/fsstress.c index 7e7cf60..e341aa1 100644 --- a/ltp/fsstress.c +++ b/ltp/fsstress.c @@ -69,6 +69,8 @@ typedef enum { OP_LINK, OP_MKDIR, OP_MKNOD, + OP_MREAD, + OP_MWRITE, OP_PUNCH, OP_ZERO, OP_COLLAPSE, @@ -168,6 +170,8 @@ void getdents_f(int, long); void link_f(int, long); void mkdir_f(int, long); void mknod_f(int, long); +void mread_f(int, long); +void mwrite_f(int, long); void punch_f(int, long); void zero_f(int, long); void collapse_f(int, long); @@ -208,6 +212,8 @@ opdesc_t ops[] = { { OP_LINK, "link", link_f, 1, 1 }, { OP_MKDIR, "mkdir", mkdir_f, 2, 1 }, { OP_MKNOD, "mknod", mknod_f, 2, 1 }, + { OP_MREAD, "mread", mread_f, 4, 0 }, + { OP_MWRITE, "mwrite", mwrite_f, 4, 1 }, { OP_PUNCH, "punch", punch_f, 1, 1 }, { OP_ZERO, "zero", zero_f, 1, 1 }, { OP_COLLAPSE, "collapse", collapse_f, 1, 1 }, @@ -2656,6 +2662,187 @@ mknod_f(int opno, long r) } void +mread_f(int opno, long r) +{ + char *addr; + char *buf; + int e; + pathname_t f; + int fd; + size_t len; + __int64_t lr; + off64_t off; + int flags; + struct stat64 stb; + int v; + char st[1024]; + + init_pathname(&f); + if (!get_fname(FT_REGFILE, r, &f, NULL, NULL, &v)) { + if (v) + printf("%d/%d: mread - no filename\n", procid, opno); + free_pathname(&f); + return; + } + fd = open_path(&f, O_RDONLY); + e = fd < 0 ? errno : 0; + check_cwd(); + if (fd < 0) { + if (v) + printf("%d/%d: mread - open %s failed %d\n", + procid, opno, f.path, e); + free_pathname(&f); + return; + } + if (fstat64(fd, &stb) < 0) { + if (v) + printf("%d/%d: mread - fstat64 %s failed %d\n", + procid, opno, f.path, errno); + free_pathname(&f); + close(fd); + return; + } + if (stb.st_size == 0) { + if (v) + printf("%d/%d: mread - %s%s zero size\n", procid, opno, + f.path, st); + free_pathname(&f); + close(fd); + return; + } + + inode_info(st, sizeof(st), &stb, v); + lr = ((__int64_t)random() << 32) + random(); + off = (off64_t)(lr % stb.st_size); + off &= (off64_t)(~(sysconf(_SC_PAGE_SIZE) - 1)); + len = (size_t)(random() % MIN(stb.st_size - off, FILELEN_MAX)) + 1; + + /* try private file mappings with 20% rate */ + flags = (random() % 20) ? MAP_SHARED : MAP_PRIVATE; + do { + addr = mmap(NULL, len, PROT_READ, flags, fd, off); + e = (addr == MAP_FAILED) ? errno : 0; + if (errno == ENOMEM && flags & MAP_PRIVATE) { + /* turn to shared mapping if memeory is not enough for private mapping */ + flags = MAP_SHARED; + } else if (errno == ENOMEM && len > sysconf(_SC_PAGE_SIZE)) { + /* reduce mapping length, if memeory is not enough for shared mapping */ + len /= 2; + } + } while (errno == ENOMEM && len > sysconf(_SC_PAGE_SIZE)); + if (e && v) + printf("%d/%d: mread - mmap failed %s%s [%lld,%d,%s] %d\n", + procid, opno, f.path, st, (long long)off, (int)len, + (flags & MAP_PRIVATE) ? "MAP_PRIVATE" : "MAP_SHARED", e); + + if (addr != MAP_FAILED) { + if ((buf = malloc(len)) != NULL) { + memcpy(buf, addr, len); + free(buf); + } + e = munmap(addr, len) < 0 ? errno : 0; + if (e && v) + printf("%d/%d: mread - munmap failed %s%s [%lld,%d] %d\n", + procid, opno, f.path, st, (long long)off, + (int)len, e); + } + if (v) + printf("%d/%d: mread %s%s [%lld,%d,%s] %d\n", + procid, opno, f.path, st, (long long)off, (int)len, + (flags & MAP_PRIVATE) ? "MAP_PRIVATE" : "MAP_SHARED", e); + + free_pathname(&f); + close(fd); +} + +void +mwrite_f(int opno, long r) +{ + char *addr; + int e; + pathname_t f; + int fd; + size_t len; + __int64_t lr; + off64_t off; + int flags; + struct stat64 stb; + int v; + char st[1024]; + + init_pathname(&f); + if (!get_fname(FT_REGFILE, r, &f, NULL, NULL, &v)) { + if (v) + printf("%d/%d: mwrite - no filename\n", procid, opno); + free_pathname(&f); + return; + } + fd = open_path(&f, O_WRONLY); + e = fd < 0 ? errno : 0; + check_cwd(); + if (fd < 0) { + if (v) + printf("%d/%d: mwrite - open %s failed %d\n", + procid, opno, f.path, e); + free_pathname(&f); + return; + } + if (fstat64(fd, &stb) < 0) { + if (v) + printf("%d/%d: mwrite - fstat64 %s failed %d\n", + procid, opno, f.path, errno); + free_pathname(&f); + close(fd); + return; + } + inode_info(st, sizeof(st), &stb, v); + lr = ((__int64_t)random() << 32) + random(); + off = (off64_t)(lr % MIN(stb.st_size + (1024 * 1024), MAXFSIZE)); + off %= maxfsize; + off &= (off64_t)(~(sysconf(_SC_PAGE_SIZE) - 1)); + len = (size_t)(random() % MIN(maxfsize - off, FILELEN_MAX)) + 1; + + /* + * truncate file to the size we need to map and access, + * keep away SIGBUS / SIGSEGV killing this process + */ + e = truncate64_path(&f, off + len) < 0 ? errno : 0; + /* try private file mappings with 20% rate */ + flags = (random() % 20) ? MAP_SHARED : MAP_PRIVATE; + do { + addr = mmap(NULL, len, PROT_WRITE, flags, fd, off); + e = (addr == MAP_FAILED) ? errno : 0; + if (errno == ENOMEM && flags & MAP_PRIVATE) { + /* turn to shared mapping if memeory is not enough for private mapping */ + flags = MAP_SHARED; + } else if (errno == ENOMEM && len > sysconf(_SC_PAGE_SIZE)) { + /* reduce mapping length, if memeory is not enough for shared mapping */ + len /= 2; + } + } while (errno == ENOMEM && len > sysconf(_SC_PAGE_SIZE)); + if (e && v) + printf("%d/%d: mwrite - mmap failed %s%s [%lld,%d,%s] %d\n", + procid, opno, f.path, st, (long long)off, (int)len, + (flags & MAP_PRIVATE) ? "MAP_PRIVATE" : "MAP_SHARED", e); + + if (addr != MAP_FAILED) { + memset(addr, nameseq & 0xff, len); + e = munmap(addr, len) < 0 ? errno : 0; + if (e && v) + printf("%d/%d: mwrite - munmap failed %s%s [%lld,%d] %d\n", + procid, opno, f.path, st, (long long)off, + (int)len, e); + } + if (v) + printf("%d/%d: mwrite %s%s [%lld,%d,%s] %d\n", + procid, opno, f.path, st, (long long)off, (int)len, + (flags & MAP_PRIVATE) ? "MAP_PRIVATE" : "MAP_SHARED", e); + + free_pathname(&f); + close(fd); +} + +void punch_f(int opno, long r) { #ifdef HAVE_LINUX_FALLOC_H diff --git a/src/global.h b/src/global.h index f63246b..51d1e94 100644 --- a/src/global.h +++ b/src/global.h @@ -178,4 +178,8 @@ #endif /* HAVE_LINUX_FALLOC_H */ +#ifndef HAVE_SYS_MMAN_H +#include +#endif + #endif /* GLOBAL_H */ -- 2.7.4