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| author | Boaz Harrosh <bharrosh@panasas.com> | 2007-10-08 16:36:45 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-10-12 14:54:58 -0400 |
| commit | e1c234685c50807e10a3e7873e6e006976a4d8e8 (patch) | |
| tree | 4be0f09620503f6669a40dacd49326443c9c07dc /include/scsi | |
| parent | 55db6c1b8ed52bfc876e87971de8c67c42f36909 (diff) | |
| download | linux-e1c234685c50807e10a3e7873e6e006976a4d8e8.tar.gz linux-e1c234685c50807e10a3e7873e6e006976a4d8e8.tar.bz2 linux-e1c234685c50807e10a3e7873e6e006976a4d8e8.zip | |
[SCSI] scsi_error: Refactoring scsi_error to facilitate in synchronous REQUEST_SENSE
- Drivers/transports that want to send a synchronous REQUEST_SENSE command
as part of their .queuecommand sequence, have 2 new API's that facilitate
in doing so and abstract them from scsi-ml internals.
void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
struct scsi_eh_save *sesci, unsigned char *cmnd,
int cmnd_size, int sense_bytes)
Will hijack a command and prepare it for request sense if needed.
And will save any later needed info into a scsi_eh_save structure.
void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
struct scsi_eh_save *sesci);
Will undo any changes done to a command by above function. Making
it ready for completion.
- Re-factor scsi_send_eh_cmnd() to use above APIs
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_eh.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index c5c0f6762a01..44224ba4dd90 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -1,7 +1,7 @@ #ifndef _SCSI_SCSI_EH_H #define _SCSI_SCSI_EH_H -struct scsi_cmnd; +#include <scsi/scsi_cmnd.h> struct scsi_device; struct Scsi_Host; @@ -65,4 +65,25 @@ extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, extern int scsi_reset_provider(struct scsi_device *, int); +struct scsi_eh_save { + int result; + enum dma_data_direction data_direction; + unsigned char cmd_len; + unsigned char cmnd[MAX_COMMAND_SIZE]; + + void *buffer; + unsigned bufflen; + unsigned short use_sg; + int resid; + + struct scatterlist sense_sgl; +}; + +extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, + struct scsi_eh_save *ses, unsigned char *cmnd, + int cmnd_size, unsigned sense_bytes); + +extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, + struct scsi_eh_save *ses); + #endif /* _SCSI_SCSI_EH_H */ |