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Message-Id: <20210808215234.1939266-1-daeho43@gmail.com>
Date: Sun, 8 Aug 2021 14:52:33 -0700
From: Daeho Jeong <daeho43@...il.com>
To: linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc: Daeho Jeong <daehojeong@...gle.com>
Subject: [PATCH] f2fs-tools: change fiemap print out format
From: Daeho Jeong <daehojeong@...gle.com>
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 <daehojeong@...gle.com>
---
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
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