scsi_dev_info_list_add – add one dev_info list entry. Synopsis int scsi_dev_info_list_add(int compatible, char *vendor, char *model, char *strflags, int flags); Arguments compatible if true, null terminate short strings. Otherwise space pad. vendor vendor string model model (product) string strflags integer string flags if strflags NULL, use this flag value Description Create and add one dev_info entry…
scsi_complete_async_scans – Wait for asynchronous scans to complete Synopsis int scsi_complete_async_scans(void); Arguments void no arguments Description When this function returns, any host which started scanning before this function was called will have finished its scan. Hosts which started scanning after this function was called may or may not have finished. Authors James Bottomley <James.Bottomley [at]…
scsi_cmd_get_serial – Assign a serial number to a command Synopsis void scsi_cmd_get_serial(struct Scsi_Host *host, struct scsi_cmnd *cmd); Arguments host the scsi host cmd command to assign serial number to Description a serial number identifies a request for error recovery and debugging purposes. Protected by the Host_Lock of host. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author….
scsi_check_sense – Examine scsi cmd sense Synopsis int scsi_check_sense(struct scsi_cmnd *scmd); Arguments scmd Cmd to have sense checked. Description Return value: SUCCESS or FAILED or NEEDS_RETRY or ADD_TO_MLQUEUE Notes When a deferred error is detected the current command has not been executed and needs retrying. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob…
scsi_change_queue_depth – change a device’s queue depth Synopsis int scsi_change_queue_depth(struct scsi_device *sdev, int depth); Arguments sdev SCSI Device in question depth number of commands allowed to be queued to the driver Description Sets the device queue depth and returns the new value. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author….
scsi_block_when_processing_errors – Prevent cmds from being queued. Synopsis int scsi_block_when_processing_errors(struct scsi_device *sdev); Arguments sdev Device on which we are performing recovery. Description We block until the host is out of error recovery, and then check to see whether the host or the device is offline. Return value: 0 when dev was taken offline by error…
scsi_bios_ptable – Read PC partition table out of first sector of device. Synopsis unsigned char *scsi_bios_ptable(struct block_device *dev); Arguments dev from this device Description Reads the first sector from the device and returns 0x42 bytes starting at offset 0x1be. Return partition table in kmalloc(GFP_KERNEL) memory, or NULL on error. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com>…
scsi_alloc_target – allocate a new or find an existing target Synopsis struct scsi_target *scsi_alloc_target(struct device *parent, int channel, uint id); Arguments parent parent of the target (need not be a scsi host) channel target channel number (zero if no channels) id target id number Description Return an existing target if one exists, provided it hasn’t…
scsi_alloc_sdev – allocate and setup a scsi_Device Synopsis struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, u64 lun, void *hostdata); Arguments starget which target to allocate a scsi_device for lun which lun hostdata usually NULL and set by ->slave_alloc instead Description Allocate, initialize for io, and return a pointer to a scsi_Device. Stores the shost, channel, id, and…
scsi_add_single_device – Respond to user request to probe for/add device Synopsis int scsi_add_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 add-single-device” to /proc/scsi/scsi. does scsi_host_lookup and either user_scan if that transport type supports…
scsi_add_lun – allocate and fully initialze a scsi_device Synopsis int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, int *bflags, int async); Arguments sdev holds information to be stored in the new scsi_device inq_result holds the result of a previous INQUIRY to the LUN bflags black/white list flag async 1 if this device is being scanned asynchronously…
scsi_add_host_with_dma – add a scsi host with dma device Synopsis int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev, struct device *dma_dev); Arguments shost scsi host pointer to add dev a struct device of type scsi class dma_dev dma device for the host Note You rarely need to worry about this unless you’re in a virtualised host…
scsi_6_lba_len – Get LBA and transfer length Synopsis void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen); Arguments cdb SCSI command to translate plba the LBA plen the transfer length Description Calculate LBA and transfer length for 6-byte commands. Author Jeff Garzik Author. Copyright
scsi_16_lba_len – Get LBA and transfer length Synopsis void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen); Arguments cdb SCSI command to translate plba the LBA plen the transfer length Description Calculate LBA and transfer length for 16-byte commands. Author Jeff Garzik Author. Copyright
scsi_10_lba_len – Get LBA and transfer length Synopsis void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen); Arguments cdb SCSI command to translate plba the LBA plen the transfer length Description Calculate LBA and transfer length for 10-byte commands. Author Jeff Garzik Author. Copyright
scnprintf – Format a string and place it in a buffer Synopsis int scnprintf(char *buf, size_t size, const char *fmt, …); Arguments buf The buffer to place the result into size The size of the buffer, including the trailing null space fmt The format string to use … Arguments for the format string Description The…
scan_read_oob – [GENERIC] Scan data+OOB region to buffer Synopsis int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs, size_t len); Arguments mtd MTD device structure buf temporary buffer offs offset at which to scan len length of data region to read Description Scan read data from data+OOB. May traverse multiple pages, interleaving page,OOB,page,OOB,… in buf. Completes…
sb_start_write – get write access to a superblock Synopsis void sb_start_write(struct super_block *sb); Arguments sb the super we write to Description When a process wants to write data or metadata to a file system (i.e. dirty a page or an inode), it should embed the operation in a sb_start_write – sb_end_write pair to get exclusion…
sb_start_pagefault – get write access to a superblock from a page fault Synopsis void sb_start_pagefault(struct super_block *sb); Arguments sb the super we write to Description When a process starts handling write page fault, it should embed the operation into sb_start_pagefault – sb_end_pagefault pair to get exclusion against file system freezing. This is needed since the…
sb_end_write – drop write access to a superblock Synopsis void sb_end_write(struct super_block *sb); Arguments sb the super we wrote to Description Decrement number of writers to the filesystem. Wake up possible waiters wanting to freeze the filesystem. Copyright