Re: [Libguestfs] [PATCH v2] mkfs: optimization and code cleanup

v1->v2: fix a typo pointed by Matt Optimizations by reducing the STREQ operations and do some code cleanup. Signed-off-by: Wanlong Gao <gaowanlong(a)cn.fujitsu.com&gt; --- daemon/mkfs.c | 29 +++++++++++++---------------- 1 files changed, 13 insertions(+), 16 deletions(-) diff --git a/daemon/mkfs.c b/daemon/mkfs.c index a2c2366..7757623 100644 --- a/daemon/mkfs.c +++ b/daemon/mkfs.c @@ -44,13 +44,16 @@ do_mkfs_opts (const char *fstype, const char *device, int blocksize, int r; char *err; char mke2fs[] = "mke2fs"; + int extfs = 0; + + if (STREQ (fstype, "ext2") || STREQ (fstype, "ext3") || + STREQ (fstype, "ext4")) extfs = 1; /* For ext2/3/4 run the mke2fs program directly. This is because * the mkfs program "eats" some options, in particular the -F * option. */ - if (STREQ (fstype, "ext2") || STREQ (fstype, "ext3") || - STREQ (fstype, "ext4")) { + if (extfs) { if (e2prog (mke2fs) == -1) return -1; ADD_ARG (argv, i, mke2fs); @@ -64,9 +67,7 @@ do_mkfs_opts (const char *fstype, const char *device, int blocksize, /* Force mke2fs to create a filesystem, even if it thinks it * shouldn't (RHBZ#690819). */ - if (STREQ (fstype, "ext2") || STREQ (fstype, "ext3") || - STREQ (fstype, "ext4")) - ADD_ARG (argv, i, "-F"); + if (extfs) ADD_ARG (argv, i, "-F"); /* mkfs.ntfs requires the -Q argument otherwise it writes zeroes * to every block and does bad block detection, neither of which @@ -77,16 +78,13 @@ do_mkfs_opts (const char *fstype, const char *device, int blocksize, /* mkfs.reiserfs produces annoying interactive prompts unless you * tell it to be quiet. + * mkfs.jfs is the same + * mkfs.xfs must force to make xfs filesystem when the device already + * has a filesystem on it */ - if (STREQ (fstype, "reiserfs")) - ADD_ARG (argv, i, "-f"); - - /* Same for JFS. */ - if (STREQ (fstype, "jfs")) - ADD_ARG (argv, i, "-f"); - - if (STREQ (fstype, "xfs")) - ADD_ARG (argv, i, "-f"); + if (STREQ(fstype, "reiserfs") || STREQ(fstype, "jfs") || + STREQ(fstype, "xfs")) + ADD_ARG(argv, i, "-f"); /* For GFS, GFS2, assume a single node. */ if (STREQ (fstype, "gfs") || STREQ (fstype, "gfs2")) { @@ -147,8 +145,7 @@ do_mkfs_opts (const char *fstype, const char *device, int blocksize, } if (optargs_bitmask & GUESTFS_MKFS_OPTS_INODE_BITMASK) { - if (!STREQ (fstype, "ext2") && !STREQ (fstype, "ext3") && - !STREQ (fstype, "ext4")) { + if (!extfs) { reply_with_error ("inode size (-I) can only be set on ext2/3/4 filesystems"); return -1; }