X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Fdirectio.c;h=7bcc5dc2dfa9e3a6da07724d4287c56840268aa3;hp=cc92c80254299ad8866b877b41ba6ab6a53da686;hb=7ce2000eb0f4e7b7ea1f362c17099881098cfef7;hpb=a2a0746305449dbd925879b14dc2c0d6040bb8bf diff --git a/lustre/tests/directio.c b/lustre/tests/directio.c index cc92c80..7bcc5dc 100644 --- a/lustre/tests/directio.c +++ b/lustre/tests/directio.c @@ -1,3 +1,7 @@ +/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- + * vim:expandtab:shiftwidth=8:tabstop=8: + */ +#define _GNU_SOURCE #include #include #include @@ -8,73 +12,192 @@ #include #include -// not correctly in the headers yet!! -#ifndef O_DIRECT -#define O_DIRECT 040000 /* direct disk access hint */ -#endif +int write_buffer(char *fname, char *buffer, int len) +{ + int fd, rc; + + fd = open(fname, O_WRONLY | O_CREAT | O_TRUNC, 0644); + if (fd == -1) { + printf("Cannot open %s: %s\n", fname, strerror(errno)); + exit(1); + } + rc = write(fd, buffer, len); + if (rc != len) { + printf("write: %d\n", rc); + exit(1); + } + close(fd); + return 0; +} + +void verify(char *buffer, char *compare, int length) +{ + int i; + for (i = 0; i < length; i++) { + if (buffer[i] != compare[i]) { + fprintf(stderr, "garbage read (i=%d): expected %c, found %c\n", + i, compare[i], buffer[i]); + write_buffer("/tmp/dio1", buffer, length); + write_buffer("/tmp/dio2", compare, length); + exit(1); + } + } +} + int main(int argc, char **argv) { int fd; - char *buf; + char *rbuf, *wbuf; int blocks, seek_blocks; long len; off64_t seek; struct stat64 st; int rc; - if (argc != 4) { - printf("Usage: %s file seek nr_blocks\n", argv[0]); + if (argc < 4 || argc > 5) { + printf("Usage: %s file seek nr_blocks [blocksize]\n", argv[0]); return 1; } seek_blocks = strtoul(argv[2], 0, 0); blocks = strtoul(argv[3], 0, 0); + fd = open(argv[1], O_LARGEFILE | O_DIRECT | O_RDWR | O_CREAT, 0644); if (fd == -1) { printf("Cannot open %s: %s\n", argv[1], strerror(errno)); return 1; } - if (fstat64(fd, &st) < 0) { + if (argc == 5) + st.st_blksize = strtoul(argv[4], 0, 0); + else if (fstat64(fd, &st) < 0) { printf("Cannot stat %s: %s\n", argv[1], strerror(errno)); return 1; } - printf("directio on %s for %dx%lu bytes \n", argv[1], blocks, - st.st_blksize); + fprintf(stderr, "directio on %s for %dx%lu bytes \n", argv[1], blocks, + st.st_blksize); seek = (off64_t)seek_blocks * (off64_t)st.st_blksize; +#if 0 if (lseek64(fd, seek, SEEK_SET) < 0) { printf("lseek64 failed: %s\n", strerror(errno)); return 1; } - +#endif len = blocks * st.st_blksize; - buf = mmap(0, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); - if (!buf) { + wbuf = mmap(0, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); + if (wbuf == MAP_FAILED) { + printf("No memory %s\n", strerror(errno)); + return 1; + } + + rbuf = mmap(0, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); + if (rbuf == MAP_FAILED) { printf("No memory %s\n", strerror(errno)); return 1; } - memset(buf, 0xba, len); - rc = write(fd, buf, len); + memset(wbuf, 0xba, len); + rc = write(fd, wbuf, len); + if (rc != len) { + printf("Write error %s (rc = %d)\n", strerror(errno), rc); + return 1; + } + + if (lseek64(fd, seek, SEEK_SET) < 0) { + printf("Cannot seek %s\n", strerror(errno)); + return 1; + } + + rc = read(fd, rbuf, len); if (rc != len) { + printf("Read error: %s (rc = %d)\n", strerror(errno), rc); + return 1; + } + + verify(rbuf, wbuf, len); + if (memcmp(wbuf, rbuf, len)) { + printf("Data mismatch on line %d\n", __LINE__); + return 1; + } + + /* try 512-byte buffers, and make sure that the other parts of the + * page aren't modified. */ + if (st.st_blksize < 4096) { + printf("512-byte block size tests skipped (because blocksize " + "passed is < 4k)\n"); + printf("PASS\n"); + return 0; + } + + + + /* write test */ + if (lseek64(fd, 512, SEEK_SET) < 0) { + printf("Cannot seek %s\n", strerror(errno)); + return 1; + } + + memset(wbuf, 0x44, len); + memset(wbuf + 2048, 0x69, 512); + rc = write(fd, wbuf + 2048, 512); + if (rc != 512) { printf("Write error %s (rc = %d)\n", strerror(errno), rc); return 1; } + memset(rbuf, 0x44, len); + memset(rbuf + 2048, 0x69, 512); + if (memcmp(wbuf, rbuf, len)) { + printf("Data mismatch on line %d\n", __LINE__); + return 1; + } + + /* read test */ + if (lseek64(fd, 512, SEEK_SET) < 0) { + printf("Cannot seek %s\n", strerror(errno)); + return 1; + } + memset(rbuf, 0xba, len); + rc = read(fd, rbuf + 1024, 512); + if (rc != 512) { + printf("Read error: %s (rc = %d)\n", strerror(errno), rc); + return 1; + } + + memset(wbuf, 0xba, len); + memset(wbuf + 1024, 0x69, 512); + + verify(rbuf, wbuf, len); +#if 0 + if (memcmp(wbuf, rbuf, len)) { + printf("Data mismatch on line %d\n", __LINE__); + return 1; + } +#endif + + /* read back the whole block, to see that it's untouched. */ if (lseek64(fd, seek, SEEK_SET) < 0) { printf("Cannot seek %s\n", strerror(errno)); return 1; } - rc = read(fd, buf, len); + memset(rbuf, 0x1, len); + rc = read(fd, rbuf, len); if (rc != len) { printf("Read error: %s (rc = %d)\n", strerror(errno), rc); return 1; } - printf("PASS\n"); + memset(wbuf, 0xba, len); + memset(wbuf + 512, 0x69, 512); + if (memcmp(wbuf, rbuf, len)) { + printf("Data mismatch on line %d\n", __LINE__); + return 1; + } + + printf("PASS\n"); return 0; }