Author: weongyo
Date: Wed Nov 24 19:11:32 2010
New Revision: 215802
URL: http://svn.freebsd.org/changeset/base/215802
Log:
Removes all duplicated code with BPF that it's greatly simplified and
take all benefits whenever BPF code is improved.
Pointed by: jkim
Reviewed by: thompsa
Modified:
head/sys/dev/usb/controller/usb_controller.c
head/sys/dev/usb/usb_bus.h
head/sys/dev/usb/usb_pf.c
head/sys/dev/usb/usb_pf.h
Modified: head/sys/dev/usb/controller/usb_controller.c
==============================================================================
--- head/sys/dev/usb/controller/usb_controller.c Wed Nov 24 18:35:11
2010 (r215801)
+++ head/sys/dev/usb/controller/usb_controller.c Wed Nov 24 19:11:32
2010 (r215802)
@@ -548,7 +548,7 @@ usb_bus_mem_alloc_all(struct usb_bus *bu
TAILQ_INIT(&bus->intr_q.head);
- usbpf_attach(bus, &bus->uif);
+ usbpf_attach(bus);
#if USB_HAVE_BUSDMA
usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags,
Modified: head/sys/dev/usb/usb_bus.h
==============================================================================
--- head/sys/dev/usb/usb_bus.h Wed Nov 24 18:35:11 2010 (r215801)
+++ head/sys/dev/usb/usb_bus.h Wed Nov 24 19:11:32 2010 (r215802)
@@ -86,7 +86,7 @@ struct usb_bus {
struct usb_bus_methods *methods; /* filled by HC driver */
struct usb_device **devices;
- struct usbpf_if *uif; /* USB Packet Filter */
+ struct ifnet *ifp; /* only for USB Packet Filter */
usb_power_mask_t hw_power_state; /* see USB_HW_POWER_XXX */
usb_size_t uframe_usage[USB_HS_MICRO_FRAMES_MAX];
Modified: head/sys/dev/usb/usb_pf.c
==============================================================================
--- head/sys/dev/usb/usb_pf.c Wed Nov 24 18:35:11 2010 (r215801)
+++ head/sys/dev/usb/usb_pf.c Wed Nov 24 19:11:32 2010 (r215802)
@@ -43,6 +43,8 @@ __FBSDID("$FreeBSD$");
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
+#include <net/if_types.h>
+#include <net/bpf.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
@@ -55,1624 +57,39 @@ __FBSDID("$FreeBSD$");
#include <dev/usb/usb_pf.h>
#include <dev/usb/usb_transfer.h>
-/*
- * All usbpf implementations are extracted from bpf(9) APIs and it's
- * specialized for USB packet filtering between the driver and the host
- * controller.
- */
-
-MALLOC_DEFINE(M_USBPF, "USBPktFilter", "USB Packet Filter");
-
-/*
- * Rotate the packet buffers in descriptor ud. Move the store buffer into the
- * hold slot, and the free buffer ino the store slot. Zero the length of the
- * new store buffer. Descriptor lock should be held.
- */
-#define USBPF_ROTATE_BUFFERS(ud) do {
\
- (ud)->ud_hbuf = (ud)->ud_sbuf; \
- (ud)->ud_hlen = (ud)->ud_slen; \
- (ud)->ud_sbuf = (ud)->ud_fbuf; \
- (ud)->ud_slen = 0; \
- (ud)->ud_fbuf = NULL; \
- usbpf_bufheld(ud); \
-} while (0)
-
-#ifndef __i386__
-#define USBPF_ALIGN
-#endif
-
-#ifndef USBPF_ALIGN
-#define USBPF_EXTRACT_SHORT(p) ((u_int16_t)ntohs(*(u_int16_t *)p))
-#define USBPF_EXTRACT_LONG(p) (ntohl(*(u_int32_t *)p))
-#else
-#define USBPF_EXTRACT_SHORT(p)
\
- ((u_int16_t) \
- ((u_int16_t)*((u_char *)p+0)<<8| \
- (u_int16_t)*((u_char *)p+1)<<0))
-#define USBPF_EXTRACT_LONG(p)
\
- ((u_int32_t)*((u_char *)p+0)<<24| \
- (u_int32_t)*((u_char *)p+1)<<16| \
- (u_int32_t)*((u_char *)p+2)<<8| \
- (u_int32_t)*((u_char *)p+3)<<0)
-#endif
-
-/*
- * Number of scratch memory words (for USBPF_LD|USBPF_MEM and USBPF_ST).
- */
-#define USBPF_MEMWORDS 16
-
-/* Values for ud_state */
-#define USBPF_IDLE 0 /* no select in progress */
-#define USBPF_WAITING 1 /* waiting for read timeout in
select */
-#define USBPF_TIMED_OUT 2 /* read timeout has expired in
select */
-
-#define PRIUSB 26 /* interruptible */
-
-/* Frame directions */
-enum usbpf_direction {
- USBPF_D_IN, /* See incoming frames */
- USBPF_D_INOUT, /* See incoming and outgoing frames */
- USBPF_D_OUT /* See outgoing frames */
-};
-
-static void usbpf_append_bytes(struct usbpf_d *, caddr_t, u_int, void *,
- u_int);
-static void usbpf_attachd(struct usbpf_d *, struct usbpf_if *);
-static void usbpf_detachd(struct usbpf_d *);
-static int usbpf_canfreebuf(struct usbpf_d *);
-static void usbpf_buf_reclaimed(struct usbpf_d *);
-static int usbpf_canwritebuf(struct usbpf_d *);
-
-static d_open_t usbpf_open;
-static d_read_t usbpf_read;
-static d_write_t usbpf_write;
-static d_ioctl_t usbpf_ioctl;
-static d_poll_t usbpf_poll;
-static d_kqfilter_t usbpf_kqfilter;
-
-static struct cdevsw usbpf_cdevsw = {
- .d_version = D_VERSION,
- .d_open = usbpf_open,
- .d_read = usbpf_read,
- .d_write = usbpf_write,
- .d_ioctl = usbpf_ioctl,
- .d_poll = usbpf_poll,
- .d_name = "usbpf",
- .d_kqfilter = usbpf_kqfilter,
-};
-
-static struct cdev *usbpf_cdev;
-static LIST_HEAD(, usbpf_if) usbpf_iflist;
-static struct mtx usbpf_mtx; /* global lock */
-static int usbpf_uifd_cnt;
-
-static int usbpf_bufsize = 4096;
-#define USBPF_MINBUFSIZE 32
-#define USBPF_MAXBUFSIZE 0x80000
-static int usbpf_maxbufsize = USBPF_MAXBUFSIZE;
-#define USBPF_MAXINSNS 512
-static int usbpf_maxinsns = USBPF_MAXINSNS;
-
-static void
-usbpf_buffer_init(struct usbpf_d *ud)
-{
-
- ud->ud_bufsize = usbpf_bufsize;
-}
-
-/*
- * Free USBPF kernel buffers on device close.
- */
-static void
-usbpf_buffer_free(struct usbpf_d *ud)
-{
-
- if (ud->ud_sbuf != NULL)
- free(ud->ud_sbuf, M_USBPF);
- if (ud->ud_hbuf != NULL)
- free(ud->ud_hbuf, M_USBPF);
- if (ud->ud_fbuf != NULL)
- free(ud->ud_fbuf, M_USBPF);
-
-#ifdef INVARIANTS
- ud->ud_sbuf = ud->ud_hbuf = ud->ud_fbuf = (caddr_t)~0;
-#endif
-}
-
-static void
-usbpf_buffer_alloc(struct usbpf_d *ud)
-{
-
- KASSERT(ud->ud_fbuf == NULL, ("%s: ud_fbuf != NULL", __func__));
- KASSERT(ud->ud_sbuf == NULL, ("%s: ud_sbuf != NULL", __func__));
- KASSERT(ud->ud_hbuf == NULL, ("%s: ud_hbuf != NULL", __func__));
-
- ud->ud_fbuf = (caddr_t)malloc(ud->ud_bufsize, M_USBPF, M_WAITOK);
- ud->ud_sbuf = (caddr_t)malloc(ud->ud_bufsize, M_USBPF, M_WAITOK);
- ud->ud_hbuf = NULL;
- ud->ud_slen = 0;
- ud->ud_hlen = 0;
-}
-
-/*
- * Copy buffer storage to user space in read().
- */
-static int
-usbpf_buffer_uiomove(struct usbpf_d *ud, caddr_t buf, u_int len,
- struct uio *uio)
-{
-
- return (uiomove(buf, len, uio));
-}
-
-/*
- * Simple data copy to the current kernel buffer.
- */
-static void
-usbpf_buffer_append_bytes(struct usbpf_d *ud, caddr_t buf, u_int offset,
- void *src, u_int len)
-{
- u_char *src_bytes;
-
- src_bytes = (u_char *)src;
- bcopy(src_bytes, buf + offset, len);
-}
-
-/*
- * Allocate or resize buffers.
- */
-static int
-usbpf_buffer_ioctl_sblen(struct usbpf_d *ud, u_int *i)
-{
- u_int size;
-
- USBPFD_LOCK(ud);
- if (ud->ud_bif != NULL) {
- USBPFD_UNLOCK(ud);
- return (EINVAL);
- }
- size = *i;
- if (size > usbpf_maxbufsize)
- *i = size = usbpf_maxbufsize;
- else if (size < USBPF_MINBUFSIZE)
- *i = size = USBPF_MINBUFSIZE;
- ud->ud_bufsize = size;
- USBPFD_UNLOCK(ud);
- return (0);
-}
-
-static const u_short usbpf_code_map[] = {
- 0x10ff, /* 0x00-0x0f: 1111111100001000 */
- 0x3070, /* 0x10-0x1f: 0000111000001100 */
- 0x3131, /* 0x20-0x2f: 1000110010001100 */
- 0x3031, /* 0x30-0x3f: 1000110000001100 */
- 0x3131, /* 0x40-0x4f: 1000110010001100 */
- 0x1011, /* 0x50-0x5f: 1000100000001000 */
- 0x1013, /* 0x60-0x6f: 1100100000001000 */
- 0x1010, /* 0x70-0x7f: 0000100000001000 */
- 0x0093, /* 0x80-0x8f: 1100100100000000 */
- 0x0000, /* 0x90-0x9f: 0000000000000000 */
- 0x0000, /* 0xa0-0xaf: 0000000000000000 */
- 0x0002, /* 0xb0-0xbf: 0100000000000000 */
- 0x0000, /* 0xc0-0xcf: 0000000000000000 */
- 0x0000, /* 0xd0-0xdf: 0000000000000000 */
- 0x0000, /* 0xe0-0xef: 0000000000000000 */
- 0x0000 /* 0xf0-0xff: 0000000000000000 */
-};
-
-#define USBPF_VALIDATE_CODE(c) \
- ((c) <= 0xff && (usbpf_code_map[(c) >> 4] & (1 << ((c) & 0xf))) != 0)
-
-/*
- * Return true if the 'fcode' is a valid filter program.
- * The constraints are that each jump be forward and to a valid
- * code. The code must terminate with either an accept or reject.
- *
- * The kernel needs to be able to verify an application's filter code.
- * Otherwise, a bogus program could easily crash the system.
- */
-static int
-usbpf_validate(const struct usbpf_insn *f, int len)
-{
- register int i;
- register const struct usbpf_insn *p;
-
- /* Do not accept negative length filter. */
- if (len < 0)
- return (0);
-
- /* An empty filter means accept all. */
- if (len == 0)
- return (1);
-
- for (i = 0; i < len; ++i) {
- p = &f[i];
- /*
- * Check that the code is valid.
- */
- if (!USBPF_VALIDATE_CODE(p->code))
- return (0);
- /*
- * Check that that jumps are forward, and within
- * the code block.
- */
- if (USBPF_CLASS(p->code) == USBPF_JMP) {
- register u_int offset;
-
- if (p->code == (USBPF_JMP|USBPF_JA))
- offset = p->k;
- else
- offset = p->jt > p->jf ? p->jt : p->jf;
- if (offset >= (u_int)(len - i) - 1)
- return (0);
- continue;
- }
- /*
- * Check that memory operations use valid addresses.
- */
- if (p->code == USBPF_ST || p->code == USBPF_STX ||
- p->code == (USBPF_LD|USBPF_MEM) ||
- p->code == (USBPF_LDX|USBPF_MEM)) {
- if (p->k >= USBPF_MEMWORDS)
- return (0);
- continue;
- }
- /*
- * Check for constant division by 0.
- */
- if (p->code == (USBPF_ALU|USBPF_DIV|USBPF_K) && p->k == 0)
- return (0);
- }
- return (USBPF_CLASS(f[len - 1].code) == USBPF_RET);
-}
-
-#ifdef _KERNEL
-#define MINDEX(m, k) \
-{ \
- register int len = m->m_len; \
- \
- while (k >= len) { \
- k -= len; \
- m = m->m_next; \
- if (m == 0) \
- return (0); \
- len = m->m_len; \
- } \
-}
-
-static u_int16_t m_xhalf(struct mbuf *m, usbpf_u_int32 k, int *err);
-static u_int32_t m_xword(struct mbuf *m, usbpf_u_int32 k, int *err);
-
-static u_int32_t
-m_xword(struct mbuf *m, usbpf_u_int32 k, int *err)
-{
- size_t len;
- u_char *cp, *np;
- struct mbuf *m0;
-
- len = m->m_len;
- while (k >= len) {
- k -= len;
- m = m->m_next;
- if (m == 0)
- goto bad;
- len = m->m_len;
- }
- cp = mtod(m, u_char *) + k;
- if (len - k >= 4) {
- *err = 0;
- return (USBPF_EXTRACT_LONG(cp));
- }
- m0 = m->m_next;
- if (m0 == 0 || m0->m_len + len - k < 4)
- goto bad;
- *err = 0;
- np = mtod(m0, u_char *);
- switch (len - k) {
- case 1:
- return (((u_int32_t)cp[0] << 24) |
- ((u_int32_t)np[0] << 16) |
- ((u_int32_t)np[1] << 8) |
- (u_int32_t)np[2]);
-
- case 2:
- return (((u_int32_t)cp[0] << 24) |
- ((u_int32_t)cp[1] << 16) |
- ((u_int32_t)np[0] << 8) |
- (u_int32_t)np[1]);
-
- default:
- return (((u_int32_t)cp[0] << 24) |
- ((u_int32_t)cp[1] << 16) |
- ((u_int32_t)cp[2] << 8) |
- (u_int32_t)np[0]);
- }
- bad:
- *err = 1;
- return (0);
-}
-
-static u_int16_t
-m_xhalf(struct mbuf *m, usbpf_u_int32 k, int *err)
-{
- size_t len;
- u_char *cp;
- struct mbuf *m0;
-
- len = m->m_len;
- while (k >= len) {
- k -= len;
- m = m->m_next;
- if (m == 0)
- goto bad;
- len = m->m_len;
- }
- cp = mtod(m, u_char *) + k;
- if (len - k >= 2) {
- *err = 0;
- return (USBPF_EXTRACT_SHORT(cp));
- }
- m0 = m->m_next;
- if (m0 == 0)
- goto bad;
- *err = 0;
- return ((cp[0] << 8) | mtod(m0, u_char *)[0]);
- bad:
- *err = 1;
- return (0);
-}
-#endif
-
-/*
- * Execute the filter program starting at pc on the packet p
- * wirelen is the length of the original packet
- * buflen is the amount of data present
- */
-static u_int
-usbpf_filter(const struct usbpf_insn *pc, u_char *p, u_int wirelen,
- u_int buflen)
-{
- u_int32_t A = 0, X = 0;
- usbpf_u_int32 k;
- u_int32_t mem[USBPF_MEMWORDS];
-
- /*
- * XXX temporarily the filter system is disabled because currently it
- * could not handle the some machine code properly that leads to
- * kernel crash by invalid usage.
- */
- return ((u_int)-1);
-
- if (pc == NULL)
- /*
- * No filter means accept all.
- */
- return ((u_int)-1);
-
- --pc;
- while (1) {
- ++pc;
- switch (pc->code) {
- default:
-#ifdef _KERNEL
- return (0);
-#else
- abort();
-#endif
-
- case USBPF_RET|USBPF_K:
- return ((u_int)pc->k);
-
- case USBPF_RET|USBPF_A:
- return ((u_int)A);
-
- case USBPF_LD|USBPF_W|USBPF_ABS:
- k = pc->k;
- if (k > buflen || sizeof(int32_t) > buflen - k) {
-#ifdef _KERNEL
- int merr;
-
- if (buflen != 0)
- return (0);
- A = m_xword((struct mbuf *)p, k, &merr);
- if (merr != 0)
- return (0);
- continue;
-#else
- return (0);
-#endif
- }
-#ifdef USBPF_ALIGN
- if (((intptr_t)(p + k) & 3) != 0)
- A = USBPF_EXTRACT_LONG(&p[k]);
- else
-#endif
- A = ntohl(*(int32_t *)(p + k));
- continue;
-
- case USBPF_LD|USBPF_H|USBPF_ABS:
- k = pc->k;
- if (k > buflen || sizeof(int16_t) > buflen - k) {
-#ifdef _KERNEL
- int merr;
-
- if (buflen != 0)
- return (0);
- A = m_xhalf((struct mbuf *)p, k, &merr);
- continue;
-#else
- return (0);
-#endif
- }
- A = USBPF_EXTRACT_SHORT(&p[k]);
- continue;
-
- case USBPF_LD|USBPF_B|USBPF_ABS:
- k = pc->k;
- if (k >= buflen) {
-#ifdef _KERNEL
- struct mbuf *m;
-
- if (buflen != 0)
- return (0);
- m = (struct mbuf *)p;
- MINDEX(m, k);
- A = mtod(m, u_char *)[k];
- continue;
-#else
- return (0);
-#endif
- }
- A = p[k];
- continue;
-
- case USBPF_LD|USBPF_W|USBPF_LEN:
- A = wirelen;
- continue;
-
- case USBPF_LDX|USBPF_W|USBPF_LEN:
- X = wirelen;
- continue;
-
- case USBPF_LD|USBPF_W|USBPF_IND:
- k = X + pc->k;
- if (pc->k > buflen || X > buflen - pc->k ||
- sizeof(int32_t) > buflen - k) {
-#ifdef _KERNEL
- int merr;
-
- if (buflen != 0)
- return (0);
- A = m_xword((struct mbuf *)p, k, &merr);
- if (merr != 0)
- return (0);
- continue;
-#else
- return (0);
-#endif
- }
-#ifdef USBPF_ALIGN
- if (((intptr_t)(p + k) & 3) != 0)
- A = USBPF_EXTRACT_LONG(&p[k]);
- else
-#endif
- A = ntohl(*(int32_t *)(p + k));
- continue;
-
- case USBPF_LD|USBPF_H|USBPF_IND:
- k = X + pc->k;
- if (X > buflen || pc->k > buflen - X ||
- sizeof(int16_t) > buflen - k) {
-#ifdef _KERNEL
- int merr;
-
- if (buflen != 0)
- return (0);
- A = m_xhalf((struct mbuf *)p, k, &merr);
- if (merr != 0)
- return (0);
- continue;
-#else
- return (0);
-#endif
- }
- A = USBPF_EXTRACT_SHORT(&p[k]);
- continue;
-
- case USBPF_LD|USBPF_B|USBPF_IND:
- k = X + pc->k;
- if (pc->k >= buflen || X >= buflen - pc->k) {
-#ifdef _KERNEL
- struct mbuf *m;
-
- if (buflen != 0)
- return (0);
- m = (struct mbuf *)p;
- MINDEX(m, k);
- A = mtod(m, u_char *)[k];
- continue;
-#else
- return (0);
-#endif
- }
- A = p[k];
- continue;
-
- case USBPF_LDX|USBPF_MSH|USBPF_B:
- k = pc->k;
- if (k >= buflen) {
-#ifdef _KERNEL
- register struct mbuf *m;
-
- if (buflen != 0)
- return (0);
- m = (struct mbuf *)p;
- MINDEX(m, k);
- X = (mtod(m, u_char *)[k] & 0xf) << 2;
- continue;
-#else
- return (0);
-#endif
- }
- X = (p[pc->k] & 0xf) << 2;
- continue;
-
- case USBPF_LD|USBPF_IMM:
- A = pc->k;
- continue;
-
- case USBPF_LDX|USBPF_IMM:
- X = pc->k;
- continue;
-
- case USBPF_LD|USBPF_MEM:
- A = mem[pc->k];
- continue;
-
- case USBPF_LDX|USBPF_MEM:
- X = mem[pc->k];
- continue;
-
- case USBPF_ST:
- mem[pc->k] = A;
- continue;
-
- case USBPF_STX:
- mem[pc->k] = X;
- continue;
-
- case USBPF_JMP|USBPF_JA:
- pc += pc->k;
- continue;
-
- case USBPF_JMP|USBPF_JGT|USBPF_K:
- pc += (A > pc->k) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JGE|USBPF_K:
- pc += (A >= pc->k) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JEQ|USBPF_K:
- pc += (A == pc->k) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JSET|USBPF_K:
- pc += (A & pc->k) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JGT|USBPF_X:
- pc += (A > X) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JGE|USBPF_X:
- pc += (A >= X) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JEQ|USBPF_X:
- pc += (A == X) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_JMP|USBPF_JSET|USBPF_X:
- pc += (A & X) ? pc->jt : pc->jf;
- continue;
-
- case USBPF_ALU|USBPF_ADD|USBPF_X:
- A += X;
- continue;
-
- case USBPF_ALU|USBPF_SUB|USBPF_X:
- A -= X;
- continue;
-
- case USBPF_ALU|USBPF_MUL|USBPF_X:
- A *= X;
- continue;
-
- case USBPF_ALU|USBPF_DIV|USBPF_X:
- if (X == 0)
- return (0);
- A /= X;
- continue;
-
- case USBPF_ALU|USBPF_AND|USBPF_X:
- A &= X;
- continue;
-
- case USBPF_ALU|USBPF_OR|USBPF_X:
- A |= X;
- continue;
-
- case USBPF_ALU|USBPF_LSH|USBPF_X:
- A <<= X;
- continue;
-
- case USBPF_ALU|USBPF_RSH|USBPF_X:
- A >>= X;
- continue;
-
- case USBPF_ALU|USBPF_ADD|USBPF_K:
- A += pc->k;
- continue;
-
- case USBPF_ALU|USBPF_SUB|USBPF_K:
- A -= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_MUL|USBPF_K:
- A *= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_DIV|USBPF_K:
- A /= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_AND|USBPF_K:
- A &= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_OR|USBPF_K:
- A |= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_LSH|USBPF_K:
- A <<= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_RSH|USBPF_K:
- A >>= pc->k;
- continue;
-
- case USBPF_ALU|USBPF_NEG:
- A = -A;
- continue;
-
- case USBPF_MISC|USBPF_TAX:
- X = A;
- continue;
-
- case USBPF_MISC|USBPF_TXA:
- A = X;
- continue;
- }
- }
-}
-
-static void
-usbpf_free(struct usbpf_d *ud)
-{
-
- switch (ud->ud_bufmode) {
- case USBPF_BUFMODE_BUFFER:
- return (usbpf_buffer_free(ud));
- default:
- panic("usbpf_buf_free");
- }
-}
-
-/*
- * Notify the buffer model that a buffer has moved into the hold position.
- */
-static void
-usbpf_bufheld(struct usbpf_d *ud)
-{
-
- USBPFD_LOCK_ASSERT(ud);
-}
-
-/*
- * Free buffers currently in use by a descriptor.
- * Called on close.
- */
-static void
-usbpf_freed(struct usbpf_d *ud)
-{
-
- /*
- * We don't need to lock out interrupts since this descriptor has
- * been detached from its interface and it yet hasn't been marked
- * free.
- */
- usbpf_free(ud);
- if (ud->ud_rfilter != NULL)
- free((caddr_t)ud->ud_rfilter, M_USBPF);
- if (ud->ud_wfilter != NULL)
- free((caddr_t)ud->ud_wfilter, M_USBPF);
- mtx_destroy(&ud->ud_mtx);
-}
-
-/*
- * Close the descriptor by detaching it from its interface,
- * deallocating its buffers, and marking it free.
- */
-static void
-usbpf_dtor(void *data)
-{
- struct usbpf_d *ud = data;
-
- USBPFD_LOCK(ud);
- if (ud->ud_state == USBPF_WAITING)
- callout_stop(&ud->ud_callout);
- ud->ud_state = USBPF_IDLE;
- USBPFD_UNLOCK(ud);
- funsetown(&ud->ud_sigio);
- mtx_lock(&usbpf_mtx);
- if (ud->ud_bif)
- usbpf_detachd(ud);
- mtx_unlock(&usbpf_mtx);
- selwakeuppri(&ud->ud_sel, PRIUSB);
- knlist_destroy(&ud->ud_sel.si_note);
- callout_drain(&ud->ud_callout);
- usbpf_freed(ud);
- free(ud, M_USBPF);
-}
-
-/*
- * Open device. Returns ENXIO for illegal minor device number,
- * EBUSY if file is open by another process.
- */
-/* ARGSUSED */
-static int
-usbpf_open(struct cdev *dev, int flags, int fmt, struct thread *td)
-{
- struct usbpf_d *ud;
- int error;
-
- ud = malloc(sizeof(*ud), M_USBPF, M_WAITOK | M_ZERO);
- error = devfs_set_cdevpriv(ud, usbpf_dtor);
- if (error != 0) {
- free(ud, M_USBPF);
- return (error);
- }
-
- usbpf_buffer_init(ud);
- ud->ud_bufmode = USBPF_BUFMODE_BUFFER;
- ud->ud_sig = SIGIO;
- ud->ud_direction = USBPF_D_INOUT;
- ud->ud_pid = td->td_proc->p_pid;
- mtx_init(&ud->ud_mtx, devtoname(dev), "usbpf cdev lock", MTX_DEF);
- callout_init_mtx(&ud->ud_callout, &ud->ud_mtx, 0);
- knlist_init_mtx(&ud->ud_sel.si_note, &ud->ud_mtx);
-
- return (0);
-}
-
-static int
-usbpf_uiomove(struct usbpf_d *ud, caddr_t buf, u_int len, struct uio *uio)
-{
-
- if (ud->ud_bufmode != USBPF_BUFMODE_BUFFER)
- return (EOPNOTSUPP);
- return (usbpf_buffer_uiomove(ud, buf, len, uio));
-}
-
-/*
- * usbpf_read - read next chunk of packets from buffers
- */
-static int
-usbpf_read(struct cdev *dev, struct uio *uio, int ioflag)
-{
- struct usbpf_d *ud;
- int error;
- int non_block;
- int timed_out;
-
- error = devfs_get_cdevpriv((void **)&ud);
- if (error != 0)
- return (error);
-
- /*
- * Restrict application to use a buffer the same size as
- * as kernel buffers.
- */
- if (uio->uio_resid != ud->ud_bufsize)
- return (EINVAL);
-
- non_block = ((ioflag & O_NONBLOCK) != 0);
-
- USBPFD_LOCK(ud);
- ud->ud_pid = curthread->td_proc->p_pid;
- if (ud->ud_bufmode != USBPF_BUFMODE_BUFFER) {
- USBPFD_UNLOCK(ud);
- return (EOPNOTSUPP);
- }
- if (ud->ud_state == USBPF_WAITING)
- callout_stop(&ud->ud_callout);
- timed_out = (ud->ud_state == USBPF_TIMED_OUT);
- ud->ud_state = USBPF_IDLE;
- /*
- * If the hold buffer is empty, then do a timed sleep, which
- * ends when the timeout expires or when enough packets
- * have arrived to fill the store buffer.
- */
- while (ud->ud_hbuf == NULL) {
- if (ud->ud_slen != 0) {
- /*
- * A packet(s) either arrived since the previous
- * read or arrived while we were asleep.
- */
- if (ud->ud_immediate || non_block || timed_out) {
- /*
- * Rotate the buffers and return what's here
- * if we are in immediate mode, non-blocking
- * flag is set, or this descriptor timed out.
- */
- USBPF_ROTATE_BUFFERS(ud);
- break;
- }
- }
-
- /*
- * No data is available, check to see if the usbpf device
- * is still pointed at a real interface. If not, return
- * ENXIO so that the userland process knows to rebind
- * it before using it again.
- */
- if (ud->ud_bif == NULL) {
- USBPFD_UNLOCK(ud);
- return (ENXIO);
- }
-
- if (non_block) {
- USBPFD_UNLOCK(ud);
- return (EWOULDBLOCK);
- }
- error = msleep(ud, &ud->ud_mtx, PRIUSB|PCATCH,
- "uff", ud->ud_rtout);
- if (error == EINTR || error == ERESTART) {
- USBPFD_UNLOCK(ud);
- return (error);
- }
- if (error == EWOULDBLOCK) {
- /*
- * On a timeout, return what's in the buffer,
- * which may be nothing. If there is something
- * in the store buffer, we can rotate the buffers.
- */
- if (ud->ud_hbuf)
- /*
- * We filled up the buffer in between
- * getting the timeout and arriving
- * here, so we don't need to rotate.
- */
- break;
-
- if (ud->ud_slen == 0) {
- USBPFD_UNLOCK(ud);
- return (0);
- }
- USBPF_ROTATE_BUFFERS(ud);
- break;
- }
- }
- /*
- * At this point, we know we have something in the hold slot.
- */
- USBPFD_UNLOCK(ud);
-
- /*
- * Move data from hold buffer into user space.
- * We know the entire buffer is transferred since
- * we checked above that the read buffer is usbpf_bufsize bytes.
- *
- * XXXRW: More synchronization needed here: what if a second thread
- * issues a read on the same fd at the same time? Don't want this
- * getting invalidated.
- */
- error = usbpf_uiomove(ud, ud->ud_hbuf, ud->ud_hlen, uio);
-
- USBPFD_LOCK(ud);
- ud->ud_fbuf = ud->ud_hbuf;
- ud->ud_hbuf = NULL;
- ud->ud_hlen = 0;
- usbpf_buf_reclaimed(ud);
- USBPFD_UNLOCK(ud);
-
- return (error);
-}
-
-static int
-usbpf_write(struct cdev *dev, struct uio *uio, int ioflag)
-{
-
- /* NOT IMPLEMENTED */
- return (ENOSYS);
-}
-
-static int
-usbpf_ioctl_sblen(struct usbpf_d *ud, u_int *i)
-{
-
- if (ud->ud_bufmode != USBPF_BUFMODE_BUFFER)
- return (EOPNOTSUPP);
- return (usbpf_buffer_ioctl_sblen(ud, i));
-}
-
-/*
- * Reset a descriptor by flushing its packet buffer and clearing the receive
- * and drop counts. This is doable for kernel-only buffers, but with
- * zero-copy buffers, we can't write to (or rotate) buffers that are
- * currently owned by userspace. It would be nice if we could encapsulate
- * this logic in the buffer code rather than here.
- */
-static void
-usbpf_reset_d(struct usbpf_d *ud)
-{
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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