fibmap.f2fs: add bdev information

This patch shows devname and start_lba based on zero sector.
fibmap reports related lba, sometimes we want to know absolute lba of
file to compare with blktrace.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --git a/tools/fibmap.c b/tools/fibmap.c
index 9eb6b90..ed0a08e 100644 (file)
--- a/tools/fibmap.c
+++ b/tools/fibmap.c
@@ -7,6 +7,8 @@
 #include <errno.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>
+#include <libgen.h>
+#include <linux/hdreg.h>
 #include <linux/types.h>
 #include <linux/fs.h>
 
@@ -41,6 +43,42 @@ void print_stat(struct stat64 *st)
        printf("--------------------------------------------\n\n");
 }
 
+void stat_bdev(struct stat64 *st, unsigned int *start_lba)
+{
+       struct stat bdev_stat;
+       struct hd_geometry geom;
+       char devname[32] = { 0, };
+       char linkname[32] = { 0, };
+       int fd;
+
+       sprintf(devname, "/dev/block/%d:%d", major(st->st_dev), minor(st->st_dev));
+
+       fd = open(devname, O_RDONLY);
+       if (fd < 0)
+               return;
+
+       if (fstat(fd, &bdev_stat) < 0)
+               goto out;
+
+       if (S_ISBLK(bdev_stat.st_mode)) {
+               if (ioctl(fd, HDIO_GETGEO, &geom) < 0)
+                       *start_lba = 0;
+               else
+                       *start_lba = geom.start;
+       }
+
+       if (readlink(devname, linkname, sizeof(linkname)) < 0)
+               goto out;
+
+       printf("----------------bdev info-------------------\n");
+       printf("devname = %s\n", basename(linkname));
+       printf("start_lba = %u\n", *start_lba);
+
+out:
+       close(fd);
+
+}
+
 int main(int argc, char *argv[])
 {
        int fd;
@@ -50,6 +88,7 @@ int main(int argc, char *argv[])
        int total_blks;
        unsigned int i;
        struct file_ext ext;
+       __u32 start_lba;
        __u32 blknum;
 
        if (argc != 2) {
@@ -73,9 +112,12 @@ int main(int argc, char *argv[])
                goto out;
        }
 
+       stat_bdev(&st, &start_lba);
+
        total_blks = (st.st_size + st.st_blksize - 1) / st.st_blksize;
 
-       printf("\n%s :\n", filename);
+       printf("\n----------------file info-------------------\n");
+       printf("%s :\n", filename);
        print_stat(&st);
        printf("file_pos   start_blk     end_blk        blks\n");