Differential D31983 Diff 95304 usr.sbin/bhyve/pci_virtio_block.c

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usr.sbin/bhyve/pci_virtio_block.c

Show First 20 Lines • Show All 447 Lines • ▼ Show 20 Lines	vi_interrupt(&sc->vbsc_vs, VIRTIO_PCI_ISR_CONFIG,
sc->vbsc_vs.vs_msix_cfg_idx);		sc->vbsc_vs.vs_msix_cfg_idx);
}		}

static int		static int
pci_vtblk_init(struct vmctx ctx, struct pci_devinst pi, nvlist_t *nvl)		pci_vtblk_init(struct vmctx ctx, struct pci_devinst pi, nvlist_t *nvl)
{		{
char bident[sizeof("XX:X:X")];		char bident[sizeof("XX:X:X")];
struct blockif_ctxt *bctxt;		struct blockif_ctxt *bctxt;
const char *path;		const char path, serial;
MD5_CTX mdctx;		MD5_CTX mdctx;
u_char digest[16];		u_char digest[16];
struct pci_vtblk_softc *sc;		struct pci_vtblk_softc *sc;
off_t size;		off_t size;
int i, sectsz, sts, sto;		int i, sectsz, sts, sto;

/*		/*
* The supplied backing file has to exist		* The supplied backing file has to exist
Show All 28 Lines	pci_vtblk_init(struct vmctx ctx, struct pci_devinst pi, nvlist_t *nvl)
/* init virtio softc and virtqueues */		/* init virtio softc and virtqueues */
vi_softc_linkup(&sc->vbsc_vs, &sc->vbsc_consts, sc, pi, &sc->vbsc_vq);		vi_softc_linkup(&sc->vbsc_vs, &sc->vbsc_consts, sc, pi, &sc->vbsc_vq);
sc->vbsc_vs.vs_mtx = &sc->vsc_mtx;		sc->vbsc_vs.vs_mtx = &sc->vsc_mtx;

sc->vbsc_vq.vq_qsize = VTBLK_RINGSZ;		sc->vbsc_vq.vq_qsize = VTBLK_RINGSZ;
/* sc->vbsc_vq.vq_notify = we have no per-queue notify */		/* sc->vbsc_vq.vq_notify = we have no per-queue notify */

/*		/*
* Create an identifier for the backing file. Use parts of the		* If an explicit identifier is not given, create an
* md5 sum of the filename		* identifier using parts of the md5 sum of the filename.
*/		*/
		bzero(sc->vbsc_ident, VTBLK_BLK_ID_BYTES);
		if ((serial = get_config_value_node(nvl, "serial")) != NULL \|\|
		(serial = get_config_value_node(nvl, "ser")) != NULL) {
		strlcpy(sc->vbsc_ident, serial, VTBLK_BLK_ID_BYTES);
		} else {
path = get_config_value_node(nvl, "path");		path = get_config_value_node(nvl, "path");
MD5Init(&mdctx);		MD5Init(&mdctx);
MD5Update(&mdctx, path, strlen(path));		MD5Update(&mdctx, path, strlen(path));
MD5Final(digest, &mdctx);		MD5Final(digest, &mdctx);
snprintf(sc->vbsc_ident, VTBLK_BLK_ID_BYTES,		snprintf(sc->vbsc_ident, VTBLK_BLK_ID_BYTES,
"BHYVE-%02X%02X-%02X%02X-%02X%02X",		"BHYVE-%02X%02X-%02X%02X-%02X%02X",
digest[0], digest[1], digest[2], digest[3], digest[4], digest[5]);		digest[0], digest[1], digest[2], digest[3], digest[4],
		digest[5]);
		}

/* setup virtio block config space */		/* setup virtio block config space */
sc->vbsc_cfg.vbc_capacity = size / VTBLK_BSIZE; /* 512-byte units */		sc->vbsc_cfg.vbc_capacity = size / VTBLK_BSIZE; /* 512-byte units */
sc->vbsc_cfg.vbc_size_max = 0; /* not negotiated */		sc->vbsc_cfg.vbc_size_max = 0; /* not negotiated */

/*		/*
* If Linux is presented with a seg_max greater than the virtio queue		* If Linux is presented with a seg_max greater than the virtio queue
* size, it can stumble into situations where it violates its own		* size, it can stumble into situations where it violates its own
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