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nmount'ify unionfs further by using separate options instead

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of passing a flags mount options.  This removes the include of
sys/fs/unionfs/union.h in mount_unionfs as it should be.

Reviewed by:	phk
This commit is contained in:
Maxime Henrion 2002-06-15 22:48:14 +00:00
parent c3210a83c0
commit 4ce86ffd17
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=98266
3 changed files with 33 additions and 23 deletions
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34
sbin/mount_unionfs/mount_unionfs.c
View file

@ -52,8 +52,6 @@ static const char rcsid[] =
#include <sys/param.h>
#include <sys/mount.h>
#include <fs/unionfs/union.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
@ -77,26 +75,32 @@ main(argc, argv)
char *argv[];
{
struct iovec iov[8];
int ch, mntflags, unionflags;
int ch, mntflags;
char source[MAXPATHLEN];
char target[MAXPATHLEN];
struct vfsconf vfc;
int error;
int error, iovcnt;
iovcnt = 6;
mntflags = 0;
unionflags = UNMNT_ABOVE;
while ((ch = getopt(argc, argv, "bo:r")) != -1)
switch (ch) {
case 'b':
unionflags &= ~UNMNT_OPMASK;
unionflags |= UNMNT_BELOW;
iov[6].iov_base = "below";
iov[6].iov_len = strlen(iov[6].iov_base) + 1;
iov[7].iov_base = NULL;
iov[7].iov_len = 0;
iovcnt = 8;
break;
case 'o':
getmntopts(optarg, mopts, &mntflags, 0);
break;
case 'r':
unionflags &= ~UNMNT_OPMASK;
unionflags |= UNMNT_REPLACE;
iov[6].iov_base = "replace";
iov[6].iov_len = strlen(iov[6].iov_base) + 1;
iov[7].iov_base = NULL;
iov[7].iov_len = 0;
iovcnt = 8;
break;
case '?':
default:
@ -128,22 +132,18 @@ main(argc, argv)
errx(EX_OSERR, "union filesystem is not available");
iov[0].iov_base = "fstype";
iov[0].iov_len = sizeof("fstype");
iov[0].iov_len = strlen(iov[0].iov_base) + 1;
iov[1].iov_base = vfc.vfc_name;
iov[1].iov_len = strlen(vfc.vfc_name) + 1;
iov[2].iov_base = "fspath";
iov[2].iov_len = sizeof("fspath");
iov[2].iov_len = strlen(iov[2].iov_base) + 1;
iov[3].iov_base = source;
iov[3].iov_len = strlen(source) + 1;
iov[4].iov_base = "target";
iov[4].iov_len = sizeof("target");
iov[4].iov_len = strlen(iov[4].iov_base) + 1;
iov[5].iov_base = target;
iov[5].iov_len = strlen(target) + 1;
iov[6].iov_base = "unionflags";
iov[6].iov_len = sizeof("unionflags");
iov[7].iov_base = (char *)&unionflags;
iov[7].iov_len = sizeof(unionflags);
if (nmount(iov, 8, mntflags))
if (nmount(iov, iovcnt, mntflags))
err(EX_OSERR, "%s", target);
exit(0);
}

1
sys/fs/unionfs/union.h
View file

@ -41,7 +41,6 @@
#define UNMNT_ABOVE 0x0001 /* Target appears above mount point */
#define UNMNT_BELOW 0x0002 /* Target appears below mount point */
#define UNMNT_REPLACE 0x0003 /* Target replaces mount point */
#define UNMNT_OPMASK 0x0003
struct union_mount {
struct vnode *um_uppervp; /* UN_ULOCK holds locking state */

21
sys/fs/unionfs/union_vfsops.c
View file

@ -82,7 +82,7 @@ union_mount(mp, ndp, td)
struct union_mount *um = 0;
struct ucred *cred = 0;
char *cp = 0, *target;
int *flags;
int op;
int len;
u_int size;
@ -112,9 +112,20 @@ union_mount(mp, ndp, td)
if (error || target[len - 1] != '\0')
return (EINVAL);
error = vfs_getopt(opts, "unionflags", (void **)&flags, &len);
if (error || len != sizeof(int))
return (EINVAL);
op = 0;
if (vfs_getopt(opts, "below", NULL, NULL) == 0)
op = UNMNT_BELOW;
if (vfs_getopt(opts, "replace", NULL, NULL) == 0) {
/* These options are mutually exclusive. */
if (op)
return (EINVAL);
op = UNMNT_REPLACE;
}
/*
* UNMNT_ABOVE is the default.
*/
if (op == 0)
op = UNMNT_ABOVE;
/*
* Obtain lower vnode. Vnode is stored in mp->mnt_vnodecovered.
@ -184,7 +195,7 @@ union_mount(mp, ndp, td)
um = (struct union_mount *) malloc(sizeof(struct union_mount),
M_UNIONFSMNT, M_WAITOK | M_ZERO);
um->um_op = *flags & UNMNT_OPMASK;
um->um_op = op;
switch (um->um_op) {
case UNMNT_ABOVE: