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ofw/disk: Add parsedev support

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Add a parsedev support for OpenFirmware disks. We must look at
characteristics of the OFW node to know if we match this device (so
supply a match routine) or not. Add a parsing routine to allocate
devdesc for OpenFirmware disks as well.

Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D37558
This commit is contained in:
Warner Losh 2022-11-30 15:10:11 -07:00
parent b8ff248f65
commit 88a8c68298
1 changed files with 36 additions and 1 deletions
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37
stand/libofw/ofw_disk.c
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@ -50,7 +50,8 @@ static int ofwd_close(struct open_file *f);
static int ofwd_ioctl(struct open_file *f, u_long cmd, void *data);
static int ofwd_print(int verbose);
static char * ofwd_fmtdev(struct devdesc *);
static int ofwd_parsedev(struct devdesc **, const char *, const char **);
static bool ofwd_match(struct devsw *, const char *);
struct devsw ofwdisk = {
.dv_name = "block",
@ -62,7 +63,9 @@ struct devsw ofwdisk = {
.dv_ioctl = ofwd_ioctl,
.dv_print = ofwd_print,
.dv_cleanup = nullsys,
.dv_match = ofwd_match,
.dv_fmtdev = ofwd_fmtdev,
.dv_parsedev = ofwd_parsedev,
};
/*
@ -210,6 +213,16 @@ ofwd_print(int verbose __unused)
return (0);
}
static bool
ofwd_match(struct devsw *devsw, const char *devspec)
{
const char *path;
return (ofw_path_to_handle(devspec, devsw->dv_name, &path) != -1);
}
static char *
ofwd_fmtdev(struct devdesc *idev)
{
@ -217,3 +230,25 @@ ofwd_fmtdev(struct devdesc *idev)
return (dev->d_path);
}
static int
ofwd_parsedev(struct devdesc **dev, const char *devspec, const char **path)
{
const char *rem_path;
struct ofw_devdesc *idev;
if (ofw_path_to_handle(devspec, ofwdisk.dv_name, &rem_path) == -1)
return (ENOENT);
idev = malloc(sizeof(struct ofw_devdesc));
if (idev == NULL) {
printf("ofw_parsedev: malloc failed\n");
return ENOMEM;
};
strlcpy(idev->d_path, devspec, min(rem_path - devspec + 1,
sizeof(idev->d_path)));
if (dev != NULL)
*dev = &idev->dd;
if (path != NULL)
*path = rem_path;
return 0;
}