tapset::scsi(3stap)

1TAPSET::SCSI(3stap)                                        TAPSET::SCSI(3stap)
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NAME

6       tapset::scsi - systemtap scsi probe points
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DESCRIPTION

11       This  family  of probe points is used to probe the SCSI activities.  It
12       contains the following probe points:
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15       scsi.ioentry
16              Fires when SCSI mid layer prepares a SCSI request
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18              Arguments:
19
20              disk_major
21                The major number of the disk
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23              disk_minor
24                The minor number of the disk
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26              device_state
27                The current state of the device. The possible values could be:
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29                      SDEV_CREATED = 1,    /* device created but not added  to
30              sysfs
31                                            *  Only  internal commands allowed
32              (for inq) */
33                      SDEV_RUNNING = 2,    /* device properly configured
34                                            * All commands allowed */
35                      SDEV_CANCEL = 3,     /* beginning to delete device
36                                            *  Only  error  handler   commands
37              allowed */
38                      SDEV_DEL = 4,        /* device deleted
39                                            * no commands allowed */
40                      SDEV_QUIESCE = 5,    /* Device quiescent.  No block com‐
41              mands
42                                            * will be accepted, only  specials
43              (which
44                                            * originate in the mid-layer) */
45                      SDEV_OFFLINE  =  6,    /* Device offlined (by error han‐
46              dling or
47                                            * user request */
48                      SDEV_BLOCK = 7,      /* Device blocked by scsi lld.   No
49              scsi
50                                            *  commands  from user or midlayer
51              should be issued
52                                            * to the scsi lld. */
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55       scsi.iodispatching
56              Fires when the SCSI mid layer dispatches a SCSI command  to  the
57              low level driver
58
59              Arguments:
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61              host_no
62                The host number
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64              channel
65                The channel number
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67              lun
68                The lun number
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70              dev_id
71                The scsi device id
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73              device_state
74                The current state of the device.
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76              data_direction
77                The  data_direction  specifies whether this command is from/to
78              the device.
79                The possible values could be:
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81                      DMA_BIDIRECTIONAL = 0,
82                      DMA_TO_DEVICE = 1,
83                      DMA_FROM_DEVICE = 2,
84                      DMA_NONE = 3,
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86              request_buffer
87                The request buffer address
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89              req_bufflen
90                The request buffer length
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93       scsi.iodone
94              Fires when a SCSI command  is  done  by  low  level  driver  and
95              enqueued into the done queue.
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97              Arguments:
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99              host_no
100                The host number
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102              channel
103                The channel number
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105              lun
106                The lun number
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108              dev_id
109                The scsi device id
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111              device_state
112                The current state of the device
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114              data_direction
115                The  data_direction  specifies whether this command is from/to
116              the device.
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119       scsi.iocompleted
120              Fires when SCSI mid layer runs  the  completion  processing  for
121              block device I/O requests
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123              Arguments:
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125              host_no
126                The host number
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128              channel
129                The channel number
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131              lun
132                The lun number
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134              dev_id
135                The scsi device id
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137              device_state
138                The current state of the device
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140              data_direction
141                The  data_direction  specifies whether this command is from/to
142              the device.
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144              goodbytes
145                The bytes completed.
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NAME

DESCRIPTION

SEE ALSO