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linux/drivers/scsi/scsi_priv.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#ifndef _SCSI_PRIV_H
#define _SCSI_PRIV_H
#include <linux/device.h>
struct request_queue;
block: unify request timeout handling Right now SCSI and others do their own command timeout handling. Move those bits to the block layer. Instead of having a timer per command, we try to be a bit more clever and simply have one per-queue. This avoids the overhead of having to tear down and setup a timer for each command, so it will result in a lot less timer fiddling. Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-09-14 05:55:09 -07:00
struct request;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
struct scsi_cmnd;
struct scsi_device;
struct scsi_host_template;
struct Scsi_Host;
[SCSI] SCSI and FC Transport: add netlink support for posting of transport events This patch formally adds support for the posting of FC events via netlink. It is a followup to the original RFC at: http://marc.theaimsgroup.com/?l=linux-scsi&m=114530667923464&w=2 and the initial posting at: http://marc.theaimsgroup.com/?l=linux-scsi&m=115507374832500&w=2 The patch has been updated to optimize the send path, per the discussions in the initial posting. Per discussions at the Storage Summit and at OLS, we are to use netlink for async events from transports. Also per discussions, to avoid a netlink protocol per transport, I've create a single NETLINK_SCSITRANSPORT protocol, which can then be used by all transports. This patch: - Creates new files scsi_netlink.c and scsi_netlink.h, which contains the single and shared definitions for the SCSI Transport. It is tied into the base SCSI subsystem intialization. Contains a single interface routine, scsi_send_transport_event(), for a transport to send an event (via multicast to a protocol specific group). - Creates a new scsi_netlink_fc.h file, which contains the FC netlink event messages - Adds 3 new routines to the fc transport: fc_get_event_number() - to get a FC event # fc_host_post_event() - to send a simple FC event (32 bits of data) fc_host_post_vendor_event() - to send a Vendor unique event, with arbitrary amounts of data. Note: the separation of event number allows for a LLD to send a standard event, followed by vendor-specific data for the event. Note: This patch assumes 2 prior fc transport patches have been installed: http://marc.theaimsgroup.com/?l=linux-scsi&m=115555807316329&w=2 http://marc.theaimsgroup.com/?l=linux-scsi&m=115581614930261&w=2 Sorry - next time I'll do something like making these individual patches of the same posting when I know they'll be posted closely together. Signed-off-by: James Smart <James.Smart@emulex.com> Tidy up configuration not to make SCSI always select NET Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-08-18 14:30:09 -07:00
struct scsi_nl_hdr;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/*
* Scsi Error Handler Flags
*/
#define SCSI_EH_CANCEL_CMD 0x0001 /* Cancel this cmd */
#define SCSI_SENSE_VALID(scmd) \
(((scmd)->sense_buffer[0] & 0x70) == 0x70)
/* hosts.c */
extern int scsi_init_hosts(void);
extern void scsi_exit_hosts(void);
/* scsi.c */
extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd);
extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
#ifdef CONFIG_SCSI_LOGGING
void scsi_log_send(struct scsi_cmnd *cmd);
void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
#else
static inline void scsi_log_send(struct scsi_cmnd *cmd)
{ };
static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
{ };
#endif
/* scsi_devinfo.c */
enhance device info matching for multiple tables The current scsi_devinfo.c matching routines use a single table for the global blacklist. However, we're developing a need to blacklist from specific transports too (notably some tape drives using SPI which don't respond well to high speed protocols). Instead of developing separate blacklist matching for each transport class needing it, enhance the current list matching to permit multiple lists. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-06-17 12:01:58 -07:00
/* list of keys for the lists */
enum {
SCSI_DEVINFO_GLOBAL = 0,
scsi_transport_spi: Blacklist Ultrium-3 tape for IU transfers There have been several bug reports which identified the Ultrium-3 tape as just hanging up on the bus during certain types of IU transfer. The identified culpret is type 0x02 (MULTIPLE COMMAND) transfers. The only way to prevent this tape wedging is to prevent it from using IU transfers at all. So this patch uses the exported blacklist matching technology to recognise the drive and force it not to use IU transfers. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-06-17 12:05:05 -07:00
SCSI_DEVINFO_SPI,
enhance device info matching for multiple tables The current scsi_devinfo.c matching routines use a single table for the global blacklist. However, we're developing a need to blacklist from specific transports too (notably some tape drives using SPI which don't respond well to high speed protocols). Instead of developing separate blacklist matching for each transport class needing it, enhance the current list matching to permit multiple lists. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-06-17 12:01:58 -07:00
};
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
extern int scsi_get_device_flags(struct scsi_device *sdev,
[SCSI] correct some dropped const compiler warnings Make the vendor, model and rev fields in scsi_device pointers to const and update a few prototypes of functions using them. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-12-01 11:50:13 -07:00
const unsigned char *vendor,
const unsigned char *model);
enhance device info matching for multiple tables The current scsi_devinfo.c matching routines use a single table for the global blacklist. However, we're developing a need to blacklist from specific transports too (notably some tape drives using SPI which don't respond well to high speed protocols). Instead of developing separate blacklist matching for each transport class needing it, enhance the current list matching to permit multiple lists. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-06-17 12:01:58 -07:00
extern int scsi_get_device_flags_keyed(struct scsi_device *sdev,
const unsigned char *vendor,
const unsigned char *model, int key);
extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
char *model, char *strflags,
int flags, int key);
extern int scsi_dev_info_add_list(int key, const char *name);
extern int scsi_dev_info_remove_list(int key);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
extern int __init scsi_init_devinfo(void);
extern void scsi_exit_devinfo(void);
/* scsi_error.c */
block: unify request timeout handling Right now SCSI and others do their own command timeout handling. Move those bits to the block layer. Instead of having a timer per command, we try to be a bit more clever and simply have one per-queue. This avoids the overhead of having to tear down and setup a timer for each command, so it will result in a lot less timer fiddling. Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-09-14 05:55:09 -07:00
extern enum blk_eh_timer_return scsi_times_out(struct request *req);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
extern int scsi_error_handler(void *host);
extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
extern void scsi_eh_wakeup(struct Scsi_Host *shost);
extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
[SCSI] scsi_error.c: Export some scsi_eh_* functions Export a couple of functions from scsi_error that are needed to handle failed SCSI commands from the SAS EH. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> make exports GPL and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-01-26 15:08:49 -07:00
void scsi_eh_ready_devs(struct Scsi_Host *shost,
struct list_head *work_q,
struct list_head *done_q);
int scsi_eh_get_sense(struct list_head *work_q,
struct list_head *done_q);
[SCSI] modify scsi to handle new fail fast flags. This checks the errors the scsi-ml determined were retryable and returns if we should fast fail it based on the request fail fast flags. Without the patch, drivers like lpfc, qla2xxx and fcoe would return DID_ERROR for what it determines is a temporary communication problem. There is no loss of connectivity at that time and the driver thinks that it would be fast to retry at the driver level. SCSI-ml will however sees fast fail on the request and DID_ERROR and will fast fail the io. This will then cause dm-multipath to fail the path and possibley switch target controllers when we should be retrying at the scsi layer. We also were fast failing device errors to dm multiapth when unless the scsi_dh modules think otherwis we want to retry at the scsi layer because multipath can only retry the IO like scsi should have done. multipath is a little dumber though because it does not what the error was for and assumes that it should fail the paths. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-08-19 16:45:31 -07:00
int scsi_noretry_cmd(struct scsi_cmnd *scmd);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/* scsi_lib.c */
extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
extern void scsi_device_unbusy(struct scsi_device *sdev);
extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
extern void scsi_next_command(struct scsi_cmnd *cmd);
Revert "scsi: revert "[SCSI] Get rid of scsi_cmnd->done"" This reverts commit ac40532ef0b8649e6f7f83859ea0de1c4ed08a19, which gets us back the original cleanup of 6f5391c283d7fdcf24bf40786ea79061919d1e1d. It turns out that the bug that was triggered by that commit was apparently not actually triggered by that commit at all, and just the testing conditions had changed enough to make it appear to be due to it. The real problem seems to have been found by Peter Osterlund: "pktcdvd sets it [block device size] when opening the /dev/pktcdvd device, but when the drive is later opened as /dev/scd0, there is nothing that sets it back. (Btw, 40944 is possible if the disk is a CDRW that was formatted with "cdrwtool -m 10236".) The problem is that pktcdvd opens the cd device in non-blocking mode when pktsetup is run, and doesn't close it again until pktsetup -d is run. The effect is that if you meanwhile open the cd device, blkdev.c:do_open() doesn't call bd_set_size() because bdev->bd_openers is non-zero." In particular, to repeat the bug (regardless of whether commit 6f5391c283d7fdcf24bf40786ea79061919d1e1d is applied or not): " 1. Start with an empty drive. 2. pktsetup 0 /dev/scd0 3. Insert a CD containing an isofs filesystem. 4. mount /dev/pktcdvd/0 /mnt/tmp 5. umount /mnt/tmp 6. Press the eject button. 7. Insert a DVD containing a non-writable filesystem. 8. mount /dev/scd0 /mnt/tmp 9. find /mnt/tmp -type f -print0 | xargs -0 sha1sum >/dev/null 10. If the DVD contains data beyond the physical size of a CD, you get I/O errors in the terminal, and dmesg reports lots of "attempt to access beyond end of device" errors." which in turn is because the nested open after the media change won't cause the size to be set properly (because the original open still holds the block device, and we only do the bd_set_size() when we don't have other people holding the device open). The proper fix for that is probably to just do something like bdev->bd_inode->i_size = (loff_t)get_capacity(disk)<<9; in fs/block_dev.c:do_open() even for the cases where we're not the original opener (but *not* call bd_set_size(), since that will also change the block size of the device). Cc: Peter Osterlund <petero2@telia.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Matthew Wilcox <matthew@wil.cx> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-06 11:17:12 -07:00
extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
extern void scsi_run_host_queues(struct Scsi_Host *shost);
extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
extern void scsi_free_queue(struct request_queue *q);
extern int scsi_init_queue(void);
extern void scsi_exit_queue(void);
[SCSI] scsi_sysfs: restore prep_fn when ULD is removed A recent bug report: http://bugzilla.kernel.org/show_bug.cgi?id=9674 Was caused because the ULDs now set their own prep functions, but don't necessarily reset the prep function back to the SCSI default when they are removed. This leads to panics if commands are sent to the device after the module is removed because the prep_fn is still pointing to the old module code. The fix for this is to implement a bus remove method that resets the prep_fn pointer correctly before calling the ULD specific driver remove method. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-02 10:14:30 -07:00
struct request_queue;
struct request;
[SCSI] Support devices with protection information Implement support for DMA of protection information for devices that are data integrity capable. - Add support for mapping an extra scatter-gather list containing the protection information. - Allocate protection scsi_data_buffer if host is DIX (integrity DMA) capable. - Accessor function for checking whether a device has protection enabled. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-07-17 14:08:48 -07:00
extern struct kmem_cache *scsi_sdb_cache;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/* scsi_proc.c */
#ifdef CONFIG_SCSI_PROC_FS
extern void scsi_proc_hostdir_add(struct scsi_host_template *);
extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
extern void scsi_proc_host_add(struct Scsi_Host *);
extern void scsi_proc_host_rm(struct Scsi_Host *);
extern int scsi_init_procfs(void);
extern void scsi_exit_procfs(void);
#else
# define scsi_proc_hostdir_add(sht) do { } while (0)
# define scsi_proc_hostdir_rm(sht) do { } while (0)
# define scsi_proc_host_add(shost) do { } while (0)
# define scsi_proc_host_rm(shost) do { } while (0)
# define scsi_init_procfs() (0)
# define scsi_exit_procfs() do { } while (0)
#endif /* CONFIG_PROC_FS */
/* scsi_scan.c */
extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
unsigned int, unsigned int, int);
extern void scsi_forget_host(struct Scsi_Host *);
extern void scsi_rescan_device(struct device *);
/* scsi_sysctl.c */
#ifdef CONFIG_SYSCTL
extern int scsi_init_sysctl(void);
extern void scsi_exit_sysctl(void);
#else
# define scsi_init_sysctl() (0)
# define scsi_exit_sysctl() do { } while (0)
#endif /* CONFIG_SYSCTL */
/* scsi_sysfs.c */
extern int scsi_sysfs_add_sdev(struct scsi_device *);
extern int scsi_sysfs_add_host(struct Scsi_Host *);
extern int scsi_sysfs_register(void);
extern void scsi_sysfs_unregister(void);
extern void scsi_sysfs_device_initialize(struct scsi_device *);
extern int scsi_sysfs_target_initialize(struct scsi_device *);
extern struct scsi_transport_template blank_transport_template;
[SCSI] fix callers of scsi_remove_device() who already hold the scan muted This patch (as544) adds a private entry point to scsi_remove_device, for use when callers already own the scan_mutex. The appropriate callers are modified to use the new entry point. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-07-26 07:20:53 -07:00
extern void __scsi_remove_device(struct scsi_device *);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
extern struct bus_type scsi_bus_type;
[SCSI] use default attributes for scsi_host This patch removes the unused sysfs attibute overwriting logic for the scsi host attibutes, and plugs them into the driver core default attribute creation. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-03-18 06:32:28 -07:00
extern struct attribute_group *scsi_sysfs_shost_attr_groups[];
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
[SCSI] SCSI and FC Transport: add netlink support for posting of transport events This patch formally adds support for the posting of FC events via netlink. It is a followup to the original RFC at: http://marc.theaimsgroup.com/?l=linux-scsi&m=114530667923464&w=2 and the initial posting at: http://marc.theaimsgroup.com/?l=linux-scsi&m=115507374832500&w=2 The patch has been updated to optimize the send path, per the discussions in the initial posting. Per discussions at the Storage Summit and at OLS, we are to use netlink for async events from transports. Also per discussions, to avoid a netlink protocol per transport, I've create a single NETLINK_SCSITRANSPORT protocol, which can then be used by all transports. This patch: - Creates new files scsi_netlink.c and scsi_netlink.h, which contains the single and shared definitions for the SCSI Transport. It is tied into the base SCSI subsystem intialization. Contains a single interface routine, scsi_send_transport_event(), for a transport to send an event (via multicast to a protocol specific group). - Creates a new scsi_netlink_fc.h file, which contains the FC netlink event messages - Adds 3 new routines to the fc transport: fc_get_event_number() - to get a FC event # fc_host_post_event() - to send a simple FC event (32 bits of data) fc_host_post_vendor_event() - to send a Vendor unique event, with arbitrary amounts of data. Note: the separation of event number allows for a LLD to send a standard event, followed by vendor-specific data for the event. Note: This patch assumes 2 prior fc transport patches have been installed: http://marc.theaimsgroup.com/?l=linux-scsi&m=115555807316329&w=2 http://marc.theaimsgroup.com/?l=linux-scsi&m=115581614930261&w=2 Sorry - next time I'll do something like making these individual patches of the same posting when I know they'll be posted closely together. Signed-off-by: James Smart <James.Smart@emulex.com> Tidy up configuration not to make SCSI always select NET Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-08-18 14:30:09 -07:00
/* scsi_netlink.c */
#ifdef CONFIG_SCSI_NETLINK
extern void scsi_netlink_init(void);
extern void scsi_netlink_exit(void);
extern struct sock *scsi_nl_sock;
#else
static inline void scsi_netlink_init(void) {}
static inline void scsi_netlink_exit(void) {}
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/*
* internal scsi timeout functions: for use by mid-layer and transport
* classes.
*/
[SCSI] update max sdev block limit Updated patch to address comments from Pat Mansfield and Michael Reed: Bumped max to 600 (10mins). Set default dev_loss_tmo to a value other than the max (30s). Signed-off-by: James Smart <James.Smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-05-16 13:13:36 -07:00
#define SCSI_DEVICE_BLOCK_MAX_TIMEOUT 600 /* units in seconds */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
extern int scsi_internal_device_block(struct scsi_device *sdev);
extern int scsi_internal_device_unblock(struct scsi_device *sdev);
#endif /* _SCSI_PRIV_H */
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