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Differential D23638 Diff 68817 head/sys/dev/xen/blkfront/blkfront.c

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head/sys/dev/xen/blkfront/blkfront.c

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#endif #endif
#define XBD_SECTOR_SHFT 9 #define XBD_SECTOR_SHFT 9
/*---------------------------- Global Static Data ----------------------------*/ /*---------------------------- Global Static Data ----------------------------*/
static MALLOC_DEFINE(M_XENBLOCKFRONT, "xbd", "Xen Block Front driver data"); static MALLOC_DEFINE(M_XENBLOCKFRONT, "xbd", "Xen Block Front driver data");
static int xbd_enable_indirect = 1; static int xbd_enable_indirect = 1;
SYSCTL_NODE(_hw, OID_AUTO, xbd, CTLFLAG_RD, 0, "xbd driver parameters"); SYSCTL_NODE(_hw, OID_AUTO, xbd, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"xbd driver parameters");
SYSCTL_INT(_hw_xbd, OID_AUTO, xbd_enable_indirect, CTLFLAG_RDTUN, SYSCTL_INT(_hw_xbd, OID_AUTO, xbd_enable_indirect, CTLFLAG_RDTUN,
&xbd_enable_indirect, 0, "Enable xbd indirect segments"); &xbd_enable_indirect, 0, "Enable xbd indirect segments");
/*---------------------------- Command Processing ----------------------------*/ /*---------------------------- Command Processing ----------------------------*/
static void static void
xbd_freeze(struct xbd_softc *sc, xbd_flag_t xbd_flag) xbd_freeze(struct xbd_softc *sc, xbd_flag_t xbd_flag)
{ {
if (xbd_flag != XBDF_NONE && (sc->xbd_flags & xbd_flag) != 0) if (xbd_flag != XBDF_NONE && (sc->xbd_flags & xbd_flag) != 0)
▲ Show 20 Lines • Show All 826 Lines • ▼ Show 20 Lines SYSCTL_ADD_UINT(sysctl_ctx, children, OID_AUTO,
"max_request_size", CTLFLAG_RD, &xbd->xbd_max_request_size, 0, "max_request_size", CTLFLAG_RD, &xbd->xbd_max_request_size, 0,
"maximum size in bytes of a request (negotiated)"); "maximum size in bytes of a request (negotiated)");
SYSCTL_ADD_UINT(sysctl_ctx, children, OID_AUTO, SYSCTL_ADD_UINT(sysctl_ctx, children, OID_AUTO,
"ring_pages", CTLFLAG_RD, &xbd->xbd_ring_pages, 0, "ring_pages", CTLFLAG_RD, &xbd->xbd_ring_pages, 0,
"communication channel pages (negotiated)"); "communication channel pages (negotiated)");
SYSCTL_ADD_PROC(sysctl_ctx, children, OID_AUTO, SYSCTL_ADD_PROC(sysctl_ctx, children, OID_AUTO,
"features", CTLTYPE_STRING|CTLFLAG_RD, xbd, 0, "features", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, xbd,
xbd_sysctl_features, "A", "protocol features (negotiated)"); 0, xbd_sysctl_features, "A", "protocol features (negotiated)");
} }
/* /*
* Translate Linux major/minor to an appropriate name and unit * Translate Linux major/minor to an appropriate name and unit
* number. For HVM guests, this allows us to use the same drive names * number. For HVM guests, this allows us to use the same drive names
* with blkfront as the emulated drives, easing transition slightly. * with blkfront as the emulated drives, easing transition slightly.
*/ */
static void static void
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