kboot: Enhance hostdisk
Added missing functionality to allow us to boot off of things like /dev/nvme0n1p2 successfully. And to list all available devices and partitions with 'lsdev'. Sponsored by: Netflix
This commit is contained in:
parent
c51e1d7c0a
commit
7685e8d97a
@ -53,9 +53,163 @@ struct devsw hostdisk = {
|
|||||||
.dv_fmtdev = hostdisk_fmtdev,
|
.dv_fmtdev = hostdisk_fmtdev,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* We need to walk through the /sys/block directories looking for
|
||||||
|
* block devices that we can use.
|
||||||
|
*/
|
||||||
|
#define SYSBLK "/sys/block"
|
||||||
|
|
||||||
|
typedef STAILQ_HEAD(, hdinfo) hdinfo_list_t;
|
||||||
|
typedef struct hdinfo {
|
||||||
|
STAILQ_ENTRY(hdinfo) hd_link; /* link in device list */
|
||||||
|
hdinfo_list_t hd_children;
|
||||||
|
struct hdinfo *hd_parent;
|
||||||
|
const char *hd_name;
|
||||||
|
uint64_t hd_size;
|
||||||
|
uint64_t hd_sectors;
|
||||||
|
uint64_t hd_sectorsize;
|
||||||
|
int hd_flags;
|
||||||
|
} hdinfo_t;
|
||||||
|
|
||||||
|
static hdinfo_list_t hdinfo = STAILQ_HEAD_INITIALIZER(hdinfo);
|
||||||
|
|
||||||
|
typedef bool fef_cb_t(struct host_dirent64 *, void *);
|
||||||
|
#define FEF_RECURSIVE 1
|
||||||
|
|
||||||
|
static bool
|
||||||
|
foreach_file(const char *dir, fef_cb_t cb, void *argp, u_int flags)
|
||||||
|
{
|
||||||
|
char dents[2048];
|
||||||
|
int fd, dentsize;
|
||||||
|
struct host_dirent64 *dent;
|
||||||
|
|
||||||
|
fd = host_open(dir, O_RDONLY, 0);
|
||||||
|
if (fd < 0) {
|
||||||
|
printf("Can't open %s\n", dir);/* XXX */
|
||||||
|
return (false);
|
||||||
|
}
|
||||||
|
while (1) {
|
||||||
|
dentsize = host_getdents64(fd, dents, sizeof(dents));
|
||||||
|
if (dentsize <= 0)
|
||||||
|
break;
|
||||||
|
for (dent = (struct host_dirent64 *)dents;
|
||||||
|
(char *)dent < dents + dentsize;
|
||||||
|
dent = (struct host_dirent64 *)((void *)dent + dent->d_reclen)) {
|
||||||
|
if (!cb(dent, argp))
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
host_close(fd);
|
||||||
|
return (true);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
hostdisk_add_part(struct hdinfo *hd, const char *drv, uint64_t secs)
|
||||||
|
{
|
||||||
|
struct hdinfo *md;
|
||||||
|
|
||||||
|
printf("hd %s adding %s %ju\n", hd->hd_name, drv, (uintmax_t)secs);
|
||||||
|
if ((md = calloc(1, sizeof(*md))) == NULL)
|
||||||
|
return;
|
||||||
|
md->hd_name = strdup(drv);
|
||||||
|
md->hd_sectors = secs;
|
||||||
|
md->hd_sectorsize = hd->hd_sectorsize;
|
||||||
|
md->hd_size = md->hd_sectors * md->hd_sectorsize;
|
||||||
|
md->hd_parent = hd;
|
||||||
|
STAILQ_INSERT_TAIL(&hd->hd_children, md, hd_link);
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool
|
||||||
|
hostdisk_one_part(struct host_dirent64 *dent, void *argp)
|
||||||
|
{
|
||||||
|
struct hdinfo *hd = argp;
|
||||||
|
char szfn[1024];
|
||||||
|
uint64_t sz;
|
||||||
|
|
||||||
|
if (strncmp(dent->d_name, hd->hd_name, strlen(hd->hd_name)) != 0)
|
||||||
|
return (true);
|
||||||
|
/* Find out how big this is -- no size not a disk */
|
||||||
|
snprintf(szfn, sizeof(szfn), "%s/%s/%s/size", SYSBLK,
|
||||||
|
hd->hd_name, dent->d_name);
|
||||||
|
if (!file2u64(szfn, &sz))
|
||||||
|
return true;
|
||||||
|
hostdisk_add_part(hd, dent->d_name, sz);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
hostdisk_add_parts(struct hdinfo *hd)
|
||||||
|
{
|
||||||
|
char fn[1024];
|
||||||
|
|
||||||
|
snprintf(fn, sizeof(fn), "%s/%s", SYSBLK, hd->hd_name);
|
||||||
|
foreach_file(fn, hostdisk_one_part, hd, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
hostdisk_add_drive(const char *drv, uint64_t secs)
|
||||||
|
{
|
||||||
|
struct hdinfo *hd;
|
||||||
|
char fn[1024];
|
||||||
|
|
||||||
|
if ((hd = calloc(1, sizeof(*hd))) == NULL)
|
||||||
|
return;
|
||||||
|
hd->hd_name = strdup(drv);
|
||||||
|
hd->hd_sectors = secs;
|
||||||
|
snprintf(fn, sizeof(fn), "%s/%s/queue/hw_sector_size",
|
||||||
|
SYSBLK, drv);
|
||||||
|
if (!file2u64(fn, &hd->hd_sectorsize))
|
||||||
|
goto err;
|
||||||
|
hd->hd_size = hd->hd_sectors * hd->hd_sectorsize;
|
||||||
|
hd->hd_flags = 0;
|
||||||
|
STAILQ_INIT(&hd->hd_children);
|
||||||
|
printf("/dev/%s: %ju %ju %ju\n",
|
||||||
|
drv, hd->hd_size, hd->hd_sectors, hd->hd_sectorsize);
|
||||||
|
STAILQ_INSERT_TAIL(&hdinfo, hd, hd_link);
|
||||||
|
hostdisk_add_parts(hd);
|
||||||
|
return;
|
||||||
|
err:
|
||||||
|
free(hd);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool
|
||||||
|
hostdisk_one_disk(struct host_dirent64 *dent, void *argp __unused)
|
||||||
|
{
|
||||||
|
char szfn[1024];
|
||||||
|
uint64_t sz;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Skip . and ..
|
||||||
|
*/
|
||||||
|
if (strcmp(dent->d_name, ".") == 0 ||
|
||||||
|
strcmp(dent->d_name, "..") == 0)
|
||||||
|
return (true);
|
||||||
|
|
||||||
|
/* Find out how big this is -- no size not a disk */
|
||||||
|
snprintf(szfn, sizeof(szfn), "%s/%s/size", SYSBLK,
|
||||||
|
dent->d_name);
|
||||||
|
if (!file2u64(szfn, &sz))
|
||||||
|
return (true);
|
||||||
|
hostdisk_add_drive(dent->d_name, sz);
|
||||||
|
return (true);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
hostdisk_find_block_devices(void)
|
||||||
|
{
|
||||||
|
/*
|
||||||
|
* Start here XXX open SYSBLK, walk through all directories, keep the
|
||||||
|
* ones that return a size and a 'block' device when we 'stat' it. Try
|
||||||
|
* to avoid partitions and only do raw devices.
|
||||||
|
*/
|
||||||
|
foreach_file(SYSBLK, hostdisk_one_disk, NULL, 0);
|
||||||
|
}
|
||||||
|
|
||||||
static int
|
static int
|
||||||
hostdisk_init(void)
|
hostdisk_init(void)
|
||||||
{
|
{
|
||||||
|
hostdisk_find_block_devices();
|
||||||
|
|
||||||
return (0);
|
return (0);
|
||||||
}
|
}
|
||||||
@ -67,15 +221,17 @@ hostdisk_strategy(void *devdata, int flag, daddr_t dblk, size_t size,
|
|||||||
struct devdesc *desc = devdata;
|
struct devdesc *desc = devdata;
|
||||||
daddr_t pos;
|
daddr_t pos;
|
||||||
int n;
|
int n;
|
||||||
|
int64_t off;
|
||||||
uint64_t res;
|
uint64_t res;
|
||||||
uint32_t posl, posh;
|
uint32_t posl, posh;
|
||||||
|
|
||||||
pos = dblk * 512;
|
pos = dblk * 512;
|
||||||
|
|
||||||
posl = pos & 0xffffffff;
|
posl = pos & 0xffffffffu;
|
||||||
posh = (pos >> 32) & 0xffffffff;
|
posh = (pos >> 32) & 0xffffffffu;
|
||||||
if (host_llseek(desc->d_unit, posh, posl, &res, 0) < 0) {
|
if ((off = host_llseek(desc->d_unit, posh, posl, &res, 0)) < 0) {
|
||||||
printf("Seek error\n");
|
printf("Seek error on fd %d to %ju (dblk %ju) returns %jd\n",
|
||||||
|
desc->d_unit, (uintmax_t)pos, (uintmax_t)dblk, (intmax_t)off);
|
||||||
return (EIO);
|
return (EIO);
|
||||||
}
|
}
|
||||||
n = host_read(desc->d_unit, buf, size);
|
n = host_read(desc->d_unit, buf, size);
|
||||||
@ -98,7 +254,6 @@ hostdisk_open(struct open_file *f, ...)
|
|||||||
va_end(vl);
|
va_end(vl);
|
||||||
|
|
||||||
desc->d_unit = host_open(desc->d_opendata, O_RDONLY, 0);
|
desc->d_unit = host_open(desc->d_opendata, O_RDONLY, 0);
|
||||||
|
|
||||||
if (desc->d_unit <= 0) {
|
if (desc->d_unit <= 0) {
|
||||||
printf("hostdisk_open: couldn't open %s: %d\n",
|
printf("hostdisk_open: couldn't open %s: %d\n",
|
||||||
(char *)desc->d_opendata, desc->d_unit);
|
(char *)desc->d_opendata, desc->d_unit);
|
||||||
@ -128,13 +283,36 @@ static int
|
|||||||
hostdisk_print(int verbose)
|
hostdisk_print(int verbose)
|
||||||
{
|
{
|
||||||
char line[80];
|
char line[80];
|
||||||
|
hdinfo_t *hd, *md;
|
||||||
|
int ret = 0;
|
||||||
|
|
||||||
printf("%s devices:", hostdisk.dv_name);
|
printf("%s devices:", hostdisk.dv_name);
|
||||||
if (pager_output("\n") != 0)
|
if (pager_output("\n") != 0)
|
||||||
return (1);
|
return (1);
|
||||||
|
|
||||||
snprintf(line, sizeof(line), " /dev%d: Host disk\n", 0);
|
STAILQ_FOREACH(hd, &hdinfo, hd_link) {
|
||||||
return (pager_output(line));
|
snprintf(line, sizeof(line),
|
||||||
|
" /dev/%s: %ju X %ju: %ju bytes\n",
|
||||||
|
hd->hd_name,
|
||||||
|
(uintmax_t)hd->hd_sectors,
|
||||||
|
(uintmax_t)hd->hd_sectorsize,
|
||||||
|
(uintmax_t)hd->hd_size);
|
||||||
|
if ((ret = pager_output(line)) != 0)
|
||||||
|
break;
|
||||||
|
STAILQ_FOREACH(md, &hd->hd_children, hd_link) {
|
||||||
|
snprintf(line, sizeof(line),
|
||||||
|
" /dev/%s: %ju X %ju: %ju bytes\n",
|
||||||
|
md->hd_name,
|
||||||
|
(uintmax_t)md->hd_sectors,
|
||||||
|
(uintmax_t)md->hd_sectorsize,
|
||||||
|
(uintmax_t)md->hd_size);
|
||||||
|
if ((ret = pager_output(line)) != 0)
|
||||||
|
goto done;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
done:
|
||||||
|
return (ret);
|
||||||
}
|
}
|
||||||
|
|
||||||
static char *
|
static char *
|
||||||
|
Loading…
Reference in New Issue
Block a user