[PATCH] USB: ub 02 remove diag
Remove the "diag" file from the sysfs. The usbmon is good enough these days so I do not need this feature anymore. Also, sysfs is a pain. Al Viro caught a race in this, which I thought too bothersome to fix. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev
Greg Kroah-Hartman
parent
4d69581929
commit
952ba22296
@ -180,6 +180,7 @@ struct ub_dev;
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#define UB_DIR_ILLEGAL2 2
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#define UB_DIR_WRITE 3
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/* P3 */
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#define UB_DIR_CHAR(c) (((c)==UB_DIR_WRITE)? 'w': \
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(((c)==UB_DIR_READ)? 'r': 'n'))
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@ -195,24 +196,11 @@ enum ub_scsi_cmd_state {
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UB_CMDST_DONE /* Final state */
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};
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static char *ub_scsi_cmd_stname[] = {
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". ",
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"Cmd",
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"dat",
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"c2s",
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"sts",
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"clr",
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"crs",
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"Sen",
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"fin"
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};
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struct ub_scsi_cmd {
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unsigned char cdb[UB_MAX_CDB_SIZE];
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unsigned char cdb_len;
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unsigned char dir; /* 0 - none, 1 - read, 3 - write. */
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unsigned char trace_index;
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enum ub_scsi_cmd_state state;
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unsigned int tag;
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struct ub_scsi_cmd *next;
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@ -248,28 +236,6 @@ struct ub_capacity {
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unsigned int bshift; /* Shift between 512 and hard sects */
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};
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/*
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* The SCSI command tracing structure.
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*/
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#define SCMD_ST_HIST_SZ 8
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#define SCMD_TRACE_SZ 63 /* Less than 4KB of 61-byte lines */
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struct ub_scsi_cmd_trace {
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int hcur;
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unsigned int tag;
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unsigned int req_size, act_size;
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unsigned char op;
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unsigned char dir;
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unsigned char key, asc, ascq;
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char st_hst[SCMD_ST_HIST_SZ];
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};
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struct ub_scsi_trace {
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int cur;
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struct ub_scsi_cmd_trace vec[SCMD_TRACE_SZ];
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};
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/*
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* This is a direct take-off from linux/include/completion.h
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* The difference is that I do not wait on this thing, just poll.
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@ -388,7 +354,6 @@ struct ub_dev {
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wait_queue_head_t reset_wait;
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int sg_stat[6];
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struct ub_scsi_trace tr;
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};
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/*
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@ -457,137 +422,6 @@ static int ub_qlock_next = 0;
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static DEFINE_SPINLOCK(ub_lock); /* Locks globals and ->openc */
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/*
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* The SCSI command tracing procedures.
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*/
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static void ub_cmdtr_new(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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{
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int n;
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struct ub_scsi_cmd_trace *t;
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if ((n = sc->tr.cur + 1) == SCMD_TRACE_SZ) n = 0;
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t = &sc->tr.vec[n];
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memset(t, 0, sizeof(struct ub_scsi_cmd_trace));
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t->tag = cmd->tag;
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t->op = cmd->cdb[0];
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t->dir = cmd->dir;
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t->req_size = cmd->len;
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t->st_hst[0] = cmd->state;
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sc->tr.cur = n;
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cmd->trace_index = n;
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}
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static void ub_cmdtr_state(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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{
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int n;
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struct ub_scsi_cmd_trace *t;
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t = &sc->tr.vec[cmd->trace_index];
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if (t->tag == cmd->tag) {
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if ((n = t->hcur + 1) == SCMD_ST_HIST_SZ) n = 0;
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t->st_hst[n] = cmd->state;
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t->hcur = n;
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}
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}
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static void ub_cmdtr_act_len(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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{
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struct ub_scsi_cmd_trace *t;
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t = &sc->tr.vec[cmd->trace_index];
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if (t->tag == cmd->tag)
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t->act_size = cmd->act_len;
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}
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static void ub_cmdtr_sense(struct ub_dev *sc, struct ub_scsi_cmd *cmd,
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unsigned char *sense)
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{
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struct ub_scsi_cmd_trace *t;
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t = &sc->tr.vec[cmd->trace_index];
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if (t->tag == cmd->tag) {
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t->key = sense[2] & 0x0F;
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t->asc = sense[12];
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t->ascq = sense[13];
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}
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}
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static ssize_t ub_diag_show(struct device *dev, struct device_attribute *attr,
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char *page)
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{
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struct usb_interface *intf;
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struct ub_dev *sc;
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struct list_head *p;
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struct ub_lun *lun;
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int cnt;
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unsigned long flags;
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int nc, nh;
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int i, j;
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struct ub_scsi_cmd_trace *t;
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intf = to_usb_interface(dev);
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sc = usb_get_intfdata(intf);
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if (sc == NULL)
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return 0;
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cnt = 0;
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spin_lock_irqsave(sc->lock, flags);
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cnt += sprintf(page + cnt,
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"poison %d reset %d\n",
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atomic_read(&sc->poison), sc->reset);
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cnt += sprintf(page + cnt,
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"qlen %d qmax %d\n",
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sc->cmd_queue.qlen, sc->cmd_queue.qmax);
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cnt += sprintf(page + cnt,
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"sg %d %d %d %d %d .. %d\n",
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sc->sg_stat[0],
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sc->sg_stat[1],
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sc->sg_stat[2],
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sc->sg_stat[3],
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sc->sg_stat[4],
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sc->sg_stat[5]);
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list_for_each (p, &sc->luns) {
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lun = list_entry(p, struct ub_lun, link);
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cnt += sprintf(page + cnt,
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"lun %u changed %d removable %d readonly %d\n",
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lun->num, lun->changed, lun->removable, lun->readonly);
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}
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if ((nc = sc->tr.cur + 1) == SCMD_TRACE_SZ) nc = 0;
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for (j = 0; j < SCMD_TRACE_SZ; j++) {
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t = &sc->tr.vec[nc];
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cnt += sprintf(page + cnt, "%08x %02x", t->tag, t->op);
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if (t->op == REQUEST_SENSE) {
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cnt += sprintf(page + cnt, " [sense %x %02x %02x]",
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t->key, t->asc, t->ascq);
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} else {
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cnt += sprintf(page + cnt, " %c", UB_DIR_CHAR(t->dir));
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cnt += sprintf(page + cnt, " [%5d %5d]",
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t->req_size, t->act_size);
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}
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if ((nh = t->hcur + 1) == SCMD_ST_HIST_SZ) nh = 0;
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for (i = 0; i < SCMD_ST_HIST_SZ; i++) {
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cnt += sprintf(page + cnt, " %s",
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ub_scsi_cmd_stname[(int)t->st_hst[nh]]);
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if (++nh == SCMD_ST_HIST_SZ) nh = 0;
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}
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cnt += sprintf(page + cnt, "\n");
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if (++nc == SCMD_TRACE_SZ) nc = 0;
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}
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spin_unlock_irqrestore(sc->lock, flags);
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return cnt;
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}
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static DEVICE_ATTR(diag, S_IRUGO, ub_diag_show, NULL); /* N.B. World readable */
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/*
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* The id allocator.
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*
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@ -1090,7 +924,6 @@ static int ub_scsi_cmd_start(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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add_timer(&sc->work_timer);
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cmd->state = UB_CMDST_CMD;
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ub_cmdtr_state(sc, cmd);
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return 0;
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}
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@ -1143,12 +976,10 @@ static void ub_scsi_dispatch(struct ub_dev *sc)
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ub_cmdq_pop(sc);
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(*cmd->done)(sc, cmd);
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} else if (cmd->state == UB_CMDST_INIT) {
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ub_cmdtr_new(sc, cmd);
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if ((rc = ub_scsi_cmd_start(sc, cmd)) == 0)
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break;
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cmd->error = rc;
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cmd->state = UB_CMDST_DONE;
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ub_cmdtr_state(sc, cmd);
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} else {
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if (!ub_is_completed(&sc->work_done))
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break;
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@ -1245,7 +1076,6 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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return;
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}
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cmd->state = UB_CMDST_CLEAR;
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ub_cmdtr_state(sc, cmd);
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return;
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case -ESHUTDOWN: /* unplug */
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case -EILSEQ: /* unplug timeout on uhci */
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@ -1277,7 +1107,6 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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return;
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}
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cmd->state = UB_CMDST_CLR2STS;
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ub_cmdtr_state(sc, cmd);
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return;
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}
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if (urb->status == -EOVERFLOW) {
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@ -1302,7 +1131,6 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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if (urb->status != 0 ||
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len != cmd->sgv[cmd->current_sg].length) {
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cmd->act_len += len;
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ub_cmdtr_act_len(sc, cmd);
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cmd->error = -EIO;
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ub_state_stat(sc, cmd);
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@ -1329,7 +1157,6 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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}
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cmd->act_len += urb->actual_length;
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ub_cmdtr_act_len(sc, cmd);
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if (++cmd->current_sg < cmd->nsg) {
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ub_data_start(sc, cmd);
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@ -1355,7 +1182,6 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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cmd->error = -EIO; /* A cheap trick... */
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cmd->state = UB_CMDST_CLRRS;
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ub_cmdtr_state(sc, cmd);
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return;
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}
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@ -1439,7 +1265,6 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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return;
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}
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cmd->state = UB_CMDST_DONE;
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ub_cmdtr_state(sc, cmd);
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ub_cmdq_pop(sc);
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(*cmd->done)(sc, cmd);
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@ -1494,7 +1319,6 @@ static void ub_data_start(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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add_timer(&sc->work_timer);
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cmd->state = UB_CMDST_DATA;
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ub_cmdtr_state(sc, cmd);
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}
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/*
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@ -1506,7 +1330,6 @@ static void ub_state_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd, int rc)
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cmd->error = rc;
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cmd->state = UB_CMDST_DONE;
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ub_cmdtr_state(sc, cmd);
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ub_cmdq_pop(sc);
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(*cmd->done)(sc, cmd);
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}
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@ -1552,7 +1375,6 @@ static void ub_state_stat(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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cmd->stat_count = 0;
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cmd->state = UB_CMDST_STAT;
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ub_cmdtr_state(sc, cmd);
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}
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/*
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@ -1571,7 +1393,6 @@ static void ub_state_stat_counted(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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return;
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cmd->state = UB_CMDST_STAT;
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ub_cmdtr_state(sc, cmd);
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}
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/*
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@ -1609,7 +1430,6 @@ static void ub_state_sense(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
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scmd->tag = sc->tagcnt++;
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cmd->state = UB_CMDST_SENSE;
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ub_cmdtr_state(sc, cmd);
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ub_cmdq_insert(sc, scmd);
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return;
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@ -1665,11 +1485,6 @@ static void ub_top_sense_done(struct ub_dev *sc, struct ub_scsi_cmd *scmd)
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unsigned char *sense = sc->top_sense;
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struct ub_scsi_cmd *cmd;
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/*
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* Ignoring scmd->act_len, because the buffer was pre-zeroed.
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*/
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ub_cmdtr_sense(sc, scmd, sense);
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/*
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* Find the command which triggered the unit attention or a check,
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* save the sense into it, and advance its state machine.
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@ -1691,6 +1506,9 @@ static void ub_top_sense_done(struct ub_dev *sc, struct ub_scsi_cmd *scmd)
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return;
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}
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/*
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* Ignoring scmd->act_len, because the buffer was pre-zeroed.
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*/
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cmd->key = sense[2] & 0x0F;
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cmd->asc = sense[12];
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cmd->ascq = sense[13];
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@ -2413,9 +2231,6 @@ static int ub_probe(struct usb_interface *intf,
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if (ub_get_pipes(sc, sc->dev, intf) != 0)
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goto err_dev_desc;
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if (device_create_file(&sc->intf->dev, &dev_attr_diag) != 0)
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goto err_diag;
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/*
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* At this point, all USB initialization is done, do upper layer.
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* We really hate halfway initialized structures, so from the
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@ -2480,8 +2295,6 @@ static int ub_probe(struct usb_interface *intf,
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}
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return 0;
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/* device_remove_file(&sc->intf->dev, &dev_attr_diag); */
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err_diag:
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err_dev_desc:
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usb_set_intfdata(intf, NULL);
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// usb_put_intf(sc->intf);
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@ -2609,7 +2422,6 @@ static void ub_disconnect(struct usb_interface *intf)
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while ((cmd = ub_cmdq_peek(sc)) != NULL) {
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cmd->error = -ENOTCONN;
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cmd->state = UB_CMDST_DONE;
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ub_cmdtr_state(sc, cmd);
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ub_cmdq_pop(sc);
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(*cmd->done)(sc, cmd);
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cnt++;
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@ -2660,7 +2472,6 @@ static void ub_disconnect(struct usb_interface *intf)
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* and no URBs left in transit.
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*/
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device_remove_file(&sc->intf->dev, &dev_attr_diag);
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usb_set_intfdata(intf, NULL);
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// usb_put_intf(sc->intf);
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sc->intf = NULL;
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