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Sun, 08 Aug 2021 14:52:37 -0700 (PDT) Received: from daehojeong-desktop.mtv.corp.google.com ([2620:15c:211:201:82f:f0c4:8925:ebc2]) by smtp.gmail.com with ESMTPSA id r13sm20265080pgi.78.2021.08.08.14.52.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 Aug 2021 14:52:37 -0700 (PDT) From: Daeho Jeong To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, kernel-team@android.com Date: Sun, 8 Aug 2021 14:52:33 -0700 Message-Id: <20210808215234.1939266-1-daeho43@gmail.com> X-Mailer: git-send-email 2.32.0.605.g8dce9f2422-goog MIME-Version: 1.0 X-Headers-End: 1mCqip-00027v-HB Subject: [f2fs-dev] [PATCH] f2fs-tools: change fiemap print out format X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Daeho Jeong Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Daeho Jeong Given fiemap way to print out extents in the kernel, we can correctly print the layout of each file in a unit of extent, not block. So, I changed fiemap print out way like below. Fiemap: offset = 0 len = 60 logical addr. physical addr. length flags 0 0000000000000000 00000020032df000 0000000000004000 00001008 1 0000000000004000 00000020032e0000 0000000000004000 00001008 2 0000000000008000 00000020032e1000 0000000000004000 00001008 3 000000000000c000 00000020032e2000 0000000000004000 00001008 Signed-off-by: Daeho Jeong --- tools/f2fs_io/f2fs_io.c | 53 ++++++++++++++++++++++++++--------------- 1 file changed, 34 insertions(+), 19 deletions(-) diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c index 42dbd60..0d2948e 100644 --- a/tools/f2fs_io/f2fs_io.c +++ b/tools/f2fs_io/f2fs_io.c @@ -731,11 +731,11 @@ static void do_randread(int argc, char **argv, const struct cmd_desc *cmd) #if defined(HAVE_LINUX_FIEMAP_H) && defined(HAVE_LINUX_FS_H) static void do_fiemap(int argc, char **argv, const struct cmd_desc *cmd) { - unsigned count, i; - int fd; - __u64 phy_addr; - struct fiemap *fm = xmalloc(sizeof(struct fiemap) + - sizeof(struct fiemap_extent)); + unsigned int i; + int fd, extents_mem_size; + u64 start, length; + u32 mapped_extents; + struct fiemap *fm = xmalloc(sizeof(struct fiemap)); if (argc != 4) { fputs("Excess arguments\n\n", stderr); @@ -743,26 +743,41 @@ static void do_fiemap(int argc, char **argv, const struct cmd_desc *cmd) exit(1); } - fm->fm_start = atoi(argv[1]) * F2FS_BLKSIZE; - fm->fm_length = F2FS_BLKSIZE; - fm->fm_extent_count = 1; - count = atoi(argv[2]); + memset(fm, 0, sizeof(struct fiemap)); + start = atoi(argv[1]) * F2FS_BLKSIZE; + length = atoi(argv[2]) * F2FS_BLKSIZE; + fm->fm_start = start; + fm->fm_length = length; fd = xopen(argv[3], O_RDONLY | O_LARGEFILE, 0); - printf("Fiemap: offset = %08"PRIx64" len = %d\n", - (u64)fm->fm_start / F2FS_BLKSIZE, count); - for (i = 0; i < count; i++) { - if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0) - die_errno("FIEMAP failed"); + printf("Fiemap: offset = %"PRIu64" len = %"PRIu64"\n", + start / F2FS_BLKSIZE, length / F2FS_BLKSIZE); + if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0) + die_errno("FIEMAP failed"); + + mapped_extents = fm->fm_mapped_extents; + extents_mem_size = sizeof(struct fiemap_extent) * mapped_extents; + free(fm); + fm = xmalloc(sizeof(struct fiemap) + extents_mem_size); - phy_addr = fm->fm_extents[0].fe_physical / F2FS_BLKSIZE; - printf("%llu: %llu\n", fm->fm_start / F2FS_BLKSIZE, phy_addr); + memset(fm, 0, sizeof(struct fiemap)); + memset(fm->fm_extents, 0, extents_mem_size); + fm->fm_start = start; + fm->fm_length = length; + fm->fm_extent_count = mapped_extents; - if (fm->fm_extents[0].fe_flags & FIEMAP_EXTENT_LAST) - break; + if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0) + die_errno("FIEMAP failed"); - fm->fm_start += F2FS_BLKSIZE; + printf("\t%-17s%-17s%-17s%s\n", "logical addr.", "physical addr.", "length", "flags"); + for (i = 0; i < fm->fm_mapped_extents; i++) { + printf("%d\t%.16llx %.16llx %.16llx %.8x\n", i, + fm->fm_extents[i].fe_logical, fm->fm_extents[i].fe_physical, + fm->fm_extents[i].fe_length, fm->fm_extents[i].fe_flags); + + if (fm->fm_extents[i].fe_flags & FIEMAP_EXTENT_LAST) + break; } printf("\n"); free(fm); -- 2.32.0.605.g8dce9f2422-goog _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel