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authorpjd <pjd@FreeBSD.org>2004-11-06 13:07:02 +0000
committerpjd <pjd@FreeBSD.org>2004-11-06 13:07:02 +0000
commitd18ec52c7546f2c9d388a7ea50c53e7fe5c40659 (patch)
tree1082e170109a097c61a61bf73ce9f89781b9a66c
parent2b775a8633a9fd57b9fe564ed98292d3b7fac655 (diff)
downloadFreeBSD-src-d18ec52c7546f2c9d388a7ea50c53e7fe5c40659.zip
FreeBSD-src-d18ec52c7546f2c9d388a7ea50c53e7fe5c40659.tar.gz
For file backed md(4) devices output their source file via
'mdconfig -l -u <unit>'. Bump version number, as this change breaks ABI/API.
-rw-r--r--sbin/mdconfig/mdconfig.c9
-rw-r--r--sys/dev/md/md.c17
-rw-r--r--sys/sys/mdioctl.h4
3 files changed, 22 insertions, 8 deletions
diff --git a/sbin/mdconfig/mdconfig.c b/sbin/mdconfig/mdconfig.c
index 8aa34ac..083779d4 100644
--- a/sbin/mdconfig/mdconfig.c
+++ b/sbin/mdconfig/mdconfig.c
@@ -115,8 +115,11 @@ main(int argc, char **argv)
mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
cmdline = 2;
}
- mdio.md_file = optarg;
- fd = open(optarg, O_RDONLY);
+ if (realpath(optarg, mdio.md_file) == NULL) {
+ err(1, "could not find full path for %s",
+ optarg);
+ }
+ fd = open(mdio.md_file, O_RDONLY);
if (fd < 0)
err(1, "could not open %s", optarg);
else if (mdio.md_mediasize == 0) {
@@ -300,6 +303,8 @@ query(const int fd, const int unit)
}
printf("\t");
prthumanval(mdio.md_mediasize);
+ if (mdio.md_type == MD_VNODE)
+ printf("\t%s", mdio.md_file);
printf("\n");
return (0);
diff --git a/sys/dev/md/md.c b/sys/dev/md/md.c
index 22e4a11..29bed2c 100644
--- a/sys/dev/md/md.c
+++ b/sys/dev/md/md.c
@@ -174,6 +174,7 @@ struct md_s {
/* MD_VNODE related fields */
struct vnode *vnode;
+ char file[PATH_MAX];
struct ucred *cred;
/* MD_SWAP related fields */
@@ -861,15 +862,19 @@ mdcreate_vnode(struct md_s *sc, struct md_ioctl *mdio, struct thread *td)
struct nameidata nd;
int error, flags;
+ if (strlcpy(sc->file, mdio->md_file, sizeof(sc->file)) >=
+ sizeof(sc->file)) {
+ return (ENAMETOOLONG);
+ }
flags = FREAD|FWRITE;
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, mdio->md_file, td);
+ NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
error = vn_open(&nd, &flags, 0, -1);
if (error) {
NDFREE(&nd, NDF_ONLY_PNBUF);
if (error != EACCES && error != EPERM && error != EROFS)
return (error);
flags &= ~FWRITE;
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, mdio->md_file, td);
+ NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
error = vn_open(&nd, &flags, 0, -1);
}
NDFREE(&nd, NDF_ONLY_PNBUF);
@@ -1097,11 +1102,15 @@ mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread
mdio->md_mediasize = sc->mediasize;
mdio->md_sectorsize = sc->sectorsize;
if (sc->type == MD_VNODE) {
- /* XXX fill this in */
- mdio->md_file = NULL;
+ if (strlcpy(mdio->md_file, sc->file,
+ sizeof(mdio->md_file)) >= sizeof(mdio->md_file)) {
+ return (ENAMETOOLONG);
+ }
}
return (0);
case MDIOCLIST:
+ if (mdio->md_version != MDIOVERSION)
+ return (EINVAL);
i = 1;
LIST_FOREACH(sc, &md_softc_list, list) {
if (i == MDNPAD - 1)
diff --git a/sys/sys/mdioctl.h b/sys/sys/mdioctl.h
index e45c096..afc0cb8 100644
--- a/sys/sys/mdioctl.h
+++ b/sys/sys/mdioctl.h
@@ -54,20 +54,20 @@ struct md_ioctl {
unsigned md_version; /* Structure layout version */
unsigned md_unit; /* unit number */
enum md_types md_type ; /* type of disk */
- char *md_file; /* pathname of file to mount */
off_t md_mediasize; /* size of disk in bytes */
unsigned md_sectorsize; /* sectorsize */
unsigned md_options; /* options */
u_int64_t md_base; /* base address */
int md_fwheads; /* firmware heads */
int md_fwsectors; /* firmware sectors */
+ char md_file[PATH_MAX]; /* pathname of file to mount */
int md_pad[MDNPAD]; /* padding for future ideas */
};
#define MD_NAME "md"
#define MD_MODNAME "g_md"
#define MDCTL_NAME "mdctl"
-#define MDIOVERSION 0
+#define MDIOVERSION 1
/*
* Before you can use a unit, it must be configured with MDIOCSET.
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