[PATCH] libxfs: Get Physical Sector Size instead of Logical Sector size

Carlos Maiolino
2011-11-24T19:20:56Z

xfsprogs (mainly mkfs) is using the logical sector size of a volume to initialize
the filesystem, which, even in devices using Advanced Format, it can get a 512
bytes sector size if it is set as the logical sector size.
This patch changes the ioctl to get the physical sector size, independent of the
logical size.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
---
libxfs/linux.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/libxfs/linux.c b/libxfs/linux.c
index 2e07d54..0bc49dd 100644
--- a/libxfs/linux.c
+++ b/libxfs/linux.c
@@ -39,6 +39,9 @@ static int max_block_alignment;
#ifndef BLKSSZGET
# define BLKSSZGET _IO(0x12,104)
#endif
+#ifndef BLKPBSZGET
+# define BLKPBSZGET _IO(0x12,123)
+#endif

#ifndef RAMDISK_MAJOR
#define RAMDISK_MAJOR 1 /* ramdisk major number */
@@ -165,7 +168,7 @@ platform_findsizes(char *path, int fd, long long *sz, int *bsz)
*sz = (long long)tmpsize;
}

- if (ioctl(fd, BLKSSZGET, bsz) < 0) {
+ if (ioctl(fd, BLKPBSZGET, bsz) < 0) {
fprintf(stderr, _("%s: warning - cannot get sector size "
"from block device %s: %s\n"),
progname, path, strerror(errno));
--
1.7.6.4