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For file backed md(4) devices output their source file via

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'mdconfig -l -u <unit>'.
Bump version number, as this change breaks ABI/API.
This commit is contained in:
Pawel Jakub Dawidek 2004-11-06 13:07:02 +00:00
parent dc2c7965c0
commit 61a6eb62ec
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=137310
3 changed files with 22 additions and 8 deletions
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9
sbin/mdconfig/mdconfig.c
View File

@ -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);

17
sys/dev/md/md.c
View File

@ -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)

4
sys/sys/mdioctl.h
View File

@ -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.