SysTutorials Posts

scsi_remove_single_device – Respond to user request to remove a device Synopsis int scsi_remove_single_device(uint host, uint channel, uint id, uint lun); Arguments host user-supplied decimal integer channel user-supplied decimal integer id user-supplied decimal integer lun user-supplied decimal integer Description called by writing “scsi remove-single-device” to /proc/scsi/scsi. Does a scsi_device_lookup and scsi_remove_device Authors James Bottomley <James.Bottomley [at]…

scsi_remove_host – remove a scsi host Synopsis void scsi_remove_host(struct Scsi_Host *shost); Arguments shost a pointer to a scsi host to remove Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_remove_device – unregister a device from the scsi bus Synopsis void scsi_remove_device(struct scsi_device *sdev); Arguments sdev scsi_device to unregister Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_queue_work – Queue work to the Scsi_Host workqueue. Synopsis int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work); Arguments shost Pointer to Scsi_Host. work Work to queue for execution. Description Return value: 1 – work queued for execution 0 – work is already queued -EINVAL – work queue doesn’t exist Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author….

scsi_proc_hostdir_rm – remove directory in /proc for a scsi host Synopsis void scsi_proc_hostdir_rm(struct scsi_host_template *sht); Arguments sht owner of directory Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_proc_hostdir_add – Create directory in /proc for a scsi host Synopsis void scsi_proc_hostdir_add(struct scsi_host_template *sht); Arguments sht owner of this directory Description Sets sht->proc_dir to the new directory. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_proc_host_rm – remove this host’s entry from /proc Synopsis void scsi_proc_host_rm(struct Scsi_Host *shost); Arguments shost which host Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_proc_host_add – Add entry for this host to appropriate /proc dir Synopsis void scsi_proc_host_add(struct Scsi_Host *shost); Arguments shost host to add Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_probe_lun – probe a single LUN using a SCSI INQUIRY Synopsis int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, int result_len, int *bflags); Arguments sdev scsi_device to probe inq_result area to store the INQUIRY result result_len len of inq_result bflags store any bflags found here Description Probe the lun associated with req using a standard SCSI…

scsi_probe_and_add_lun – probe a LUN, if a LUN is found add it Synopsis int scsi_probe_and_add_lun(struct scsi_target *starget, u64 lun, int *bflagsp, struct scsi_device **sdevp, enum scsi_scan_mode rescan, void *hostdata); Arguments starget pointer to target device structure lun LUN of target device bflagsp store bflags here if not NULL sdevp probe the LUN corresponding to this…

scsi_prep_async_scan – prepare for an async scan Synopsis struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost); Arguments shost the host which will be scanned Return a cookie to be passed to scsi_finish_async_scan Tells the midlayer this host is going to do an asynchronous scan. It reserves the host’s position in the scanning list and ensures that other asynchronous…

scsi_partsize – Parse cylinders/heads/sectors from PC partition table Synopsis int scsi_partsize(unsigned char *buf, unsigned long capacity, unsigned int *cyls, unsigned int *hds, unsigned int *secs); Arguments buf partition table, see scsi_bios_ptable capacity size of the disk in sectors cyls put cylinders here hds put heads here secs put sectors here Description determine the BIOS mapping/geometry…

scsi_nl_rcv_msg – Receive message handler. Synopsis void scsi_nl_rcv_msg(struct sk_buff *skb); Arguments skb socket receive buffer Description Extracts message from a receive buffer. Validates message header and calls appropriate transport message handler Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_netlink_init – Called by SCSI subsystem to initialize the SCSI transport netlink interface Synopsis void scsi_netlink_init(void); Arguments void no arguments Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_netlink_exit – Called by SCSI subsystem to disable the SCSI transport netlink interface Synopsis void scsi_netlink_exit(void); Arguments void no arguments Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_mode_sense – issue a mode sense, falling back from 10 to six bytes if necessary. Synopsis int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, unsigned char *buffer, int len, int timeout, int retries, struct scsi_mode_data *data, struct scsi_sense_hdr *sshdr); Arguments sdev SCSI device to be queried dbd set if mode sense will allow block descriptors…

scsi_mode_select – issue a mode select Synopsis int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, int modepage, unsigned char *buffer, int len, int timeout, int retries, struct scsi_mode_data *data, struct scsi_sense_hdr *sshdr); Arguments sdev SCSI device to be queried pf Page format bit (1 == standard, 0 == vendor specific) sp Save page bit (0…

scsi_kunmap_atomic_sg – atomically unmap a virtual address, previously mapped with scsi_kmap_atomic_sg Synopsis void scsi_kunmap_atomic_sg(void *virt); Arguments virt virtual address to be unmapped Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

scsi_kmap_atomic_sg – find and atomically map an sg-elemnt Synopsis void *scsi_kmap_atomic_sg(struct scatterlist *sgl, int sg_count, size_t *offset, size_t *len); Arguments sgl scatter-gather list sg_count number of segments in sg offset offset in bytes into sg, on return offset into the mapped area len bytes to map, on return number of bytes mapped Description Returns virtual…

scsi_is_sas_rphy – check if a struct device represents a SAS remote PHY Synopsis int scsi_is_sas_rphy(const struct device *dev); Arguments dev device to check Return 1 if the device represents a SAS remote PHY, 0 else Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright