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Code Issues Releases Activity

Properly update FSInfo block after generation.

Browse Source 
After populating the filesystem, write a FSInfo block with
proper information.

Reviewed by:	emaste, cem
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D21363
This commit is contained in:
Xin LI 2019-08-23 05:23:45 +00:00
parent 8e67c427b5
commit 8651679a5c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=351415
3 changed files with 33 additions and 0 deletions
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2
usr.sbin/makefs/msdos.c
View File

@ -203,6 +203,8 @@ msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
errx(1, "Image file `%s' not created.", image);
TIMER_RESULTS(start, "msdos_populate_dir");
if (msdosfs_fsiflush(pmp) != 0)
errx(1, "Unable to update FSInfo block.");
if (debug & DEBUG_FS_MAKEFS)
putchar('\n');

1
usr.sbin/makefs/msdos.h
View File

@ -51,6 +51,7 @@ struct componentname {
size_t cn_namelen;
};
int msdosfs_fsiflush(struct msdosfsmount *);
struct msdosfsmount *msdosfs_mount(struct vnode *);
int msdosfs_root(struct msdosfsmount *, struct vnode *);

30
usr.sbin/makefs/msdos/msdosfs_vfsops.c
View File

@ -359,3 +359,33 @@ msdosfs_root(struct msdosfsmount *pmp, struct vnode *vp) {
vp->v_data = ndep;
return 0;
}
/*
* If we have an FSInfo block, update it.
*/
int
msdosfs_fsiflush(struct msdosfsmount *pmp)
{
struct fsinfo *fp;
struct buf *bp;
int error;
if (pmp->pm_fsinfo == 0 || (pmp->pm_flags & MSDOSFS_FSIMOD) == 0) {
error = 0;
goto out;
}
error = bread(pmp->pm_devvp, pmp->pm_fsinfo, pmp->pm_BytesPerSec,
NOCRED, &bp);
if (error != 0) {
brelse(bp);
goto out;
}
fp = (struct fsinfo *)bp->b_data;
putulong(fp->fsinfree, pmp->pm_freeclustercount);
putulong(fp->fsinxtfree, pmp->pm_nxtfree);
pmp->pm_flags &= ~MSDOSFS_FSIMOD;
error = bwrite(bp);
out:
return (error);
}