diff options
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 930 |
1 files changed, 831 insertions, 99 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index d948566bb24..2ead7e78c45 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -1,33 +1,36 @@ /* - * File...........: linux/drivers/s390/block/dasd_devmap.c * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> * Horst Hummel <Horst.Hummel@de.ibm.com> * Carsten Otte <Cotte@de.ibm.com> * Martin Schwidefsky <schwidefsky@de.ibm.com> * Bugreports.to..: <Linux390@de.ibm.com> - * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001 + * Copyright IBM Corp. 1999,2001 * * Device mapping and dasd= parameter parsing functions. All devmap * functions may not be called from interrupt context. In particular * dasd_get_device is a no-no from interrupt context. * - * $Revision: 1.40 $ */ -#include <linux/config.h> +#define KMSG_COMPONENT "dasd" + #include <linux/ctype.h> #include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> #include <asm/debug.h> #include <asm/uaccess.h> +#include <asm/ipl.h> /* This is ugly... */ #define PRINTK_HEADER "dasd_devmap:" +#define DASD_BUS_ID_SIZE 20 #include "dasd_int.h" -kmem_cache_t *dasd_page_cache; -EXPORT_SYMBOL(dasd_page_cache); +struct kmem_cache *dasd_page_cache; +EXPORT_SYMBOL_GPL(dasd_page_cache); /* * dasd_devmap_t is used to store the features and the relation @@ -41,7 +44,7 @@ EXPORT_SYMBOL(dasd_page_cache); */ struct dasd_devmap { struct list_head list; - char bus_id[BUS_ID_SIZE]; + char bus_id[DASD_BUS_ID_SIZE]; unsigned int devindex; unsigned short features; struct dasd_device *device; @@ -63,6 +66,10 @@ struct dasd_devmap { int dasd_probeonly = 0; /* is true, when probeonly mode is active */ int dasd_autodetect = 0; /* is true, when autodetection is active */ +int dasd_nopav = 0; /* is true, when PAV is disabled */ +EXPORT_SYMBOL_GPL(dasd_nopav); +int dasd_nofcx; /* disable High Performance Ficon */ +EXPORT_SYMBOL_GPL(dasd_nofcx); /* * char *dasd[] is intended to hold the ranges supplied by the dasd= statement @@ -70,8 +77,10 @@ int dasd_autodetect = 0; /* is true, when autodetection is active */ * strings when running as a module. */ static char *dasd[256]; +module_param_array(dasd, charp, NULL, 0); + /* - * Single spinlock to protect devmap structures and lists. + * Single spinlock to protect devmap and servermap structures and lists. */ static DEFINE_SPINLOCK(dasd_devmap_lock); @@ -81,15 +90,15 @@ static DEFINE_SPINLOCK(dasd_devmap_lock); static struct list_head dasd_hashlists[256]; int dasd_max_devindex; -static struct dasd_devmap *dasd_add_busid(char *, int); +static struct dasd_devmap *dasd_add_busid(const char *, int); static inline int -dasd_hash_busid(char *bus_id) +dasd_hash_busid(const char *bus_id) { int hash, i; hash = 0; - for (i = 0; (i < BUS_ID_SIZE) && *bus_id; i++, bus_id++) + for (i = 0; (i < DASD_BUS_ID_SIZE) && *bus_id; i++, bus_id++) hash += *bus_id; return hash & 0xff; } @@ -113,14 +122,30 @@ dasd_call_setup(char *str) __setup ("dasd=", dasd_call_setup); #endif /* #ifndef MODULE */ +#define DASD_IPLDEV "ipldev" + /* * Read a device busid/devno from a string. */ -static inline int +static int + dasd_busid(char **str, int *id0, int *id1, int *devno) { int val, old_style; - + + /* Interpret ipldev busid */ + if (strncmp(DASD_IPLDEV, *str, strlen(DASD_IPLDEV)) == 0) { + if (ipl_info.type != IPL_TYPE_CCW) { + pr_err("The IPL device is not a CCW device\n"); + return -EINVAL; + } + *id0 = 0; + *id1 = ipl_info.data.ccw.dev_id.ssid; + *devno = ipl_info.data.ccw.dev_id.devno; + *str += strlen(DASD_IPLDEV); + + return 0; + } /* check for leading '0x' */ old_style = 0; if ((*str)[0] == '0' && (*str)[1] == 'x') { @@ -162,7 +187,7 @@ dasd_busid(char **str, int *id0, int *id1, int *devno) * only one: "ro" for read-only devices. The default feature set * is empty (value 0). */ -static inline int +static int dasd_feature_list(char *str, char **endp) { int features, len, rc; @@ -176,16 +201,21 @@ dasd_feature_list(char *str, char **endp) features = 0; while (1) { - for (len = 0; + for (len = 0; str[len] && str[len] != ':' && str[len] != ')'; len++); if (len == 2 && !strncmp(str, "ro", 2)) features |= DASD_FEATURE_READONLY; else if (len == 4 && !strncmp(str, "diag", 4)) features |= DASD_FEATURE_USEDIAG; + else if (len == 3 && !strncmp(str, "raw", 3)) + features |= DASD_FEATURE_USERAW; + else if (len == 6 && !strncmp(str, "erplog", 6)) + features |= DASD_FEATURE_ERPLOG; + else if (len == 8 && !strncmp(str, "failfast", 8)) + features |= DASD_FEATURE_FAILFAST; else { - MESSAGE(KERN_WARNING, - "unsupported feature: %*s, " - "ignoring setting", len, str); + pr_warning("%*s is not a supported device option\n", + len, str); rc = -EINVAL; } str += len; @@ -194,8 +224,8 @@ dasd_feature_list(char *str, char **endp) str++; } if (*str != ')') { - MESSAGE(KERN_WARNING, "%s", - "missing ')' in dasd parameter string\n"); + pr_warning("A closing parenthesis ')' is missing in the " + "dasd= parameter\n"); rc = -EINVAL; } else str++; @@ -225,29 +255,43 @@ dasd_parse_keyword( char *parsestring ) { length = strlen(parsestring); residual_str = parsestring + length; } - if (strncmp ("autodetect", parsestring, length) == 0) { + if (strncmp("autodetect", parsestring, length) == 0) { dasd_autodetect = 1; - MESSAGE (KERN_INFO, "%s", - "turning to autodetection mode"); + pr_info("The autodetection mode has been activated\n"); return residual_str; } - if (strncmp ("probeonly", parsestring, length) == 0) { + if (strncmp("probeonly", parsestring, length) == 0) { dasd_probeonly = 1; - MESSAGE(KERN_INFO, "%s", - "turning to probeonly mode"); + pr_info("The probeonly mode has been activated\n"); return residual_str; } - if (strncmp ("fixedbuffers", parsestring, length) == 0) { + if (strncmp("nopav", parsestring, length) == 0) { + if (MACHINE_IS_VM) + pr_info("'nopav' is not supported on z/VM\n"); + else { + dasd_nopav = 1; + pr_info("PAV support has be deactivated\n"); + } + return residual_str; + } + if (strncmp("nofcx", parsestring, length) == 0) { + dasd_nofcx = 1; + pr_info("High Performance FICON support has been " + "deactivated\n"); + return residual_str; + } + if (strncmp("fixedbuffers", parsestring, length) == 0) { if (dasd_page_cache) return residual_str; dasd_page_cache = - kmem_cache_create("dasd_page_cache", PAGE_SIZE, 0, - SLAB_CACHE_DMA, NULL, NULL ); + kmem_cache_create("dasd_page_cache", PAGE_SIZE, + PAGE_SIZE, SLAB_CACHE_DMA, + NULL); if (!dasd_page_cache) - MESSAGE(KERN_WARNING, "%s", "Failed to create slab, " + DBF_EVENT(DBF_WARNING, "%s", "Failed to create slab, " "fixed buffer mode disabled."); else - MESSAGE (KERN_INFO, "%s", + DBF_EVENT(DBF_INFO, "%s", "turning on fixed buffer mode"); return residual_str; } @@ -257,7 +301,7 @@ dasd_parse_keyword( char *parsestring ) { /* * Try to interprete the first element on the comma separated parse string * as a device number or a range of devices. If the interpretation is - * successfull, create the matching dasd_devmap entries and return a pointer + * successful, create the matching dasd_devmap entries and return a pointer * to the residual string. * If interpretation fails or in case of an error, return an error code. */ @@ -268,7 +312,7 @@ dasd_parse_range( char *parsestring ) { int from, from_id0, from_id1; int to, to_id0, to_id1; int features, rc; - char bus_id[BUS_ID_SIZE+1], *str; + char bus_id[DASD_BUS_ID_SIZE+1], *str; str = parsestring; rc = dasd_busid(&str, &from_id0, &from_id1, &from); @@ -285,12 +329,14 @@ dasd_parse_range( char *parsestring ) { (from_id0 != to_id0 || from_id1 != to_id1 || from > to)) rc = -EINVAL; if (rc) { - MESSAGE(KERN_ERR, "Invalid device range %s", parsestring); + pr_err("%s is not a valid device range\n", parsestring); return ERR_PTR(rc); } features = dasd_feature_list(str, &str); if (features < 0) return ERR_PTR(-EINVAL); + /* each device in dasd= parameter should be set initially online */ + features |= DASD_FEATURE_INITIAL_ONLINE; while (from <= to) { sprintf(bus_id, "%01x.%01x.%04x", from_id0, from_id1, from++); @@ -302,12 +348,12 @@ dasd_parse_range( char *parsestring ) { return str + 1; if (*str == '\0') return str; - MESSAGE(KERN_WARNING, - "junk at end of dasd parameter string: %s\n", str); + pr_warning("The dasd= parameter value %s has an invalid ending\n", + str); return ERR_PTR(-EINVAL); } -static inline char * +static char * dasd_parse_next_element( char *parsestring ) { char * residual_str; residual_str = dasd_parse_keyword(parsestring); @@ -356,39 +402,37 @@ dasd_parse(void) * Add a devmap for the device specified by busid. It is possible that * the devmap already exists (dasd= parameter). The order of the devices * added through this function will define the kdevs for the individual - * devices. + * devices. */ static struct dasd_devmap * -dasd_add_busid(char *bus_id, int features) +dasd_add_busid(const char *bus_id, int features) { struct dasd_devmap *devmap, *new, *tmp; int hash; - new = (struct dasd_devmap *) - kmalloc(sizeof(struct dasd_devmap), GFP_KERNEL); + new = kzalloc(sizeof(struct dasd_devmap), GFP_KERNEL); if (!new) return ERR_PTR(-ENOMEM); spin_lock(&dasd_devmap_lock); - devmap = 0; + devmap = NULL; hash = dasd_hash_busid(bus_id); list_for_each_entry(tmp, &dasd_hashlists[hash], list) - if (strncmp(tmp->bus_id, bus_id, BUS_ID_SIZE) == 0) { + if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { devmap = tmp; break; } if (!devmap) { /* This bus_id is new. */ new->devindex = dasd_max_devindex++; - strncpy(new->bus_id, bus_id, BUS_ID_SIZE); + strncpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE); new->features = features; - new->device = 0; + new->device = NULL; list_add(&new->list, &dasd_hashlists[hash]); devmap = new; - new = 0; + new = NULL; } spin_unlock(&dasd_devmap_lock); - if (new) - kfree(new); + kfree(new); return devmap; } @@ -396,7 +440,7 @@ dasd_add_busid(char *bus_id, int features) * Find devmap for device with given bus_id. */ static struct dasd_devmap * -dasd_find_busid(char *bus_id) +dasd_find_busid(const char *bus_id) { struct dasd_devmap *devmap, *tmp; int hash; @@ -405,7 +449,7 @@ dasd_find_busid(char *bus_id) devmap = ERR_PTR(-ENODEV); hash = dasd_hash_busid(bus_id); list_for_each_entry(tmp, &dasd_hashlists[hash], list) { - if (strncmp(tmp->bus_id, bus_id, BUS_ID_SIZE) == 0) { + if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { devmap = tmp; break; } @@ -418,7 +462,7 @@ dasd_find_busid(char *bus_id) * Check if busid has been added to the list of dasd ranges. */ int -dasd_busid_known(char *bus_id) +dasd_busid_known(const char *bus_id) { return IS_ERR(dasd_find_busid(bus_id)) ? -ENOENT : 0; } @@ -436,8 +480,7 @@ dasd_forget_ranges(void) spin_lock(&dasd_devmap_lock); for (i = 0; i < 256; i++) { list_for_each_entry_safe(devmap, n, &dasd_hashlists[i], list) { - if (devmap->device != NULL) - BUG(); + BUG_ON(devmap->device != NULL); list_del(&devmap->list); kfree(devmap); } @@ -456,7 +499,7 @@ dasd_device_from_devindex(int devindex) int i; spin_lock(&dasd_devmap_lock); - devmap = 0; + devmap = NULL; for (i = 0; (i < 256) && !devmap; i++) list_for_each_entry(tmp, &dasd_hashlists[i], list) if (tmp->devindex == devindex) { @@ -482,9 +525,9 @@ dasd_devmap_from_cdev(struct ccw_device *cdev) { struct dasd_devmap *devmap; - devmap = dasd_find_busid(cdev->dev.bus_id); + devmap = dasd_find_busid(dev_name(&cdev->dev)); if (IS_ERR(devmap)) - devmap = dasd_add_busid(cdev->dev.bus_id, + devmap = dasd_add_busid(dev_name(&cdev->dev), DASD_FEATURE_DEFAULT); return devmap; } @@ -497,22 +540,23 @@ dasd_create_device(struct ccw_device *cdev) { struct dasd_devmap *devmap; struct dasd_device *device; + unsigned long flags; int rc; devmap = dasd_devmap_from_cdev(cdev); if (IS_ERR(devmap)) return (void *) devmap; - cdev->dev.driver_data = devmap; device = dasd_alloc_device(); if (IS_ERR(device)) return device; - atomic_set(&device->ref_count, 2); + atomic_set(&device->ref_count, 3); spin_lock(&dasd_devmap_lock); if (!devmap->device) { devmap->device = device; device->devindex = devmap->devindex; + device->features = devmap->features; get_device(&cdev->dev); device->cdev = cdev; rc = 0; @@ -525,6 +569,11 @@ dasd_create_device(struct ccw_device *cdev) dasd_free_device(device); return ERR_PTR(rc); } + + spin_lock_irqsave(get_ccwdev_lock(cdev), flags); + dev_set_drvdata(&cdev->dev, device); + spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); + return device; } @@ -542,11 +591,11 @@ dasd_delete_device(struct dasd_device *device) { struct ccw_device *cdev; struct dasd_devmap *devmap; + unsigned long flags; /* First remove device pointer from devmap. */ - devmap = dasd_find_busid(device->cdev->dev.bus_id); - if (IS_ERR(devmap)) - BUG(); + devmap = dasd_find_busid(dev_name(&device->cdev->dev)); + BUG_ON(IS_ERR(devmap)); spin_lock(&dasd_devmap_lock); if (devmap->device != device) { spin_unlock(&dasd_devmap_lock); @@ -556,9 +605,16 @@ dasd_delete_device(struct dasd_device *device) devmap->device = NULL; spin_unlock(&dasd_devmap_lock); - /* Drop ref_count by 2, one for the devmap reference and - * one for the passed reference. */ - atomic_sub(2, &device->ref_count); + /* Disconnect dasd_device structure from ccw_device structure. */ + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + dev_set_drvdata(&device->cdev->dev, NULL); + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + + /* + * Drop ref_count by 3, one for the devmap reference, one for + * the cdev reference and one for the passed reference. + */ + atomic_sub(3, &device->ref_count); /* Wait for reference counter to drop to zero. */ wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0); @@ -567,9 +623,6 @@ dasd_delete_device(struct dasd_device *device) cdev = device->cdev; device->cdev = NULL; - /* Disconnect dasd_devmap structure from ccw_device structure. */ - cdev->dev.driver_data = NULL; - /* Put ccw_device structure. */ put_device(&cdev->dev); @@ -586,6 +639,23 @@ dasd_put_device_wake(struct dasd_device *device) { wake_up(&dasd_delete_wq); } +EXPORT_SYMBOL_GPL(dasd_put_device_wake); + +/* + * Return dasd_device structure associated with cdev. + * This function needs to be called with the ccw device + * lock held. It can be used from interrupt context. + */ +struct dasd_device * +dasd_device_from_cdev_locked(struct ccw_device *cdev) +{ + struct dasd_device *device = dev_get_drvdata(&cdev->dev); + + if (!device) + return ERR_PTR(-ENODEV); + dasd_get_device(device); + return device; +} /* * Return dasd_device structure associated with cdev. @@ -593,12 +663,37 @@ dasd_put_device_wake(struct dasd_device *device) struct dasd_device * dasd_device_from_cdev(struct ccw_device *cdev) { + struct dasd_device *device; + unsigned long flags; + + spin_lock_irqsave(get_ccwdev_lock(cdev), flags); + device = dasd_device_from_cdev_locked(cdev); + spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); + return device; +} + +void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device) +{ struct dasd_devmap *devmap; + + devmap = dasd_find_busid(dev_name(&device->cdev->dev)); + if (IS_ERR(devmap)) + return; + spin_lock(&dasd_devmap_lock); + gdp->private_data = devmap; + spin_unlock(&dasd_devmap_lock); +} + +struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp) +{ struct dasd_device *device; + struct dasd_devmap *devmap; - device = ERR_PTR(-ENODEV); + if (!gdp->private_data) + return NULL; + device = NULL; spin_lock(&dasd_devmap_lock); - devmap = cdev->dev.driver_data; + devmap = gdp->private_data; if (devmap && devmap->device) { device = devmap->device; dasd_get_device(device); @@ -612,6 +707,51 @@ dasd_device_from_cdev(struct ccw_device *cdev) */ /* + * failfast controls the behaviour, if no path is available + */ +static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_devmap *devmap; + int ff_flag; + + devmap = dasd_find_busid(dev_name(dev)); + if (!IS_ERR(devmap)) + ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0; + else + ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0; + return snprintf(buf, PAGE_SIZE, ff_flag ? "1\n" : "0\n"); +} + +static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_devmap *devmap; + int val; + char *endp; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + + val = simple_strtoul(buf, &endp, 0); + if (((endp + 1) < (buf + count)) || (val > 1)) + return -EINVAL; + + spin_lock(&dasd_devmap_lock); + if (val) + devmap->features |= DASD_FEATURE_FAILFAST; + else + devmap->features &= ~DASD_FEATURE_FAILFAST; + if (devmap->device) + devmap->device->features = devmap->features; + spin_unlock(&dasd_devmap_lock); + return count; +} + +static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store); + +/* * readonly controls the readonly status of a dasd */ static ssize_t @@ -620,7 +760,7 @@ dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf) struct dasd_devmap *devmap; int ro_flag; - devmap = dasd_find_busid(dev->bus_id); + devmap = dasd_find_busid(dev_name(dev)); if (!IS_ERR(devmap)) ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0; else @@ -629,39 +769,97 @@ dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf) } static ssize_t -dasd_ro_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) +dasd_ro_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct dasd_devmap *devmap; - int ro_flag; + struct dasd_device *device; + int val; + char *endp; devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); if (IS_ERR(devmap)) return PTR_ERR(devmap); - ro_flag = buf[0] == '1'; + + val = simple_strtoul(buf, &endp, 0); + if (((endp + 1) < (buf + count)) || (val > 1)) + return -EINVAL; + spin_lock(&dasd_devmap_lock); - if (ro_flag) + if (val) devmap->features |= DASD_FEATURE_READONLY; else devmap->features &= ~DASD_FEATURE_READONLY; - if (devmap->device && devmap->device->gdp) - set_disk_ro(devmap->device->gdp, ro_flag); + device = devmap->device; + if (device) { + device->features = devmap->features; + val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags); + } spin_unlock(&dasd_devmap_lock); + if (device && device->block && device->block->gdp) + set_disk_ro(device->block->gdp, val); return count; } static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store); +/* + * erplog controls the logging of ERP related data + * (e.g. failing channel programs). + */ +static ssize_t +dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_devmap *devmap; + int erplog; + + devmap = dasd_find_busid(dev_name(dev)); + if (!IS_ERR(devmap)) + erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0; + else + erplog = (DASD_FEATURE_DEFAULT & DASD_FEATURE_ERPLOG) != 0; + return snprintf(buf, PAGE_SIZE, erplog ? "1\n" : "0\n"); +} + +static ssize_t +dasd_erplog_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_devmap *devmap; + int val; + char *endp; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + + val = simple_strtoul(buf, &endp, 0); + if (((endp + 1) < (buf + count)) || (val > 1)) + return -EINVAL; + + spin_lock(&dasd_devmap_lock); + if (val) + devmap->features |= DASD_FEATURE_ERPLOG; + else + devmap->features &= ~DASD_FEATURE_ERPLOG; + if (devmap->device) + devmap->device->features = devmap->features; + spin_unlock(&dasd_devmap_lock); + return count; +} + +static DEVICE_ATTR(erplog, 0644, dasd_erplog_show, dasd_erplog_store); /* * use_diag controls whether the driver should use diag rather than ssch * to talk to the device */ -static ssize_t +static ssize_t dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dasd_devmap *devmap; int use_diag; - devmap = dasd_find_busid(dev->bus_id); + devmap = dasd_find_busid(dev_name(dev)); if (!IS_ERR(devmap)) use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0; else @@ -670,21 +868,27 @@ dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf) } static ssize_t -dasd_use_diag_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) +dasd_use_diag_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct dasd_devmap *devmap; ssize_t rc; - int use_diag; + int val; + char *endp; devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); if (IS_ERR(devmap)) return PTR_ERR(devmap); - use_diag = buf[0] == '1'; + + val = simple_strtoul(buf, &endp, 0); + if (((endp + 1) < (buf + count)) || (val > 1)) + return -EINVAL; + spin_lock(&dasd_devmap_lock); /* Changing diag discipline flag is only allowed in offline state. */ rc = count; - if (!devmap->device) { - if (use_diag) + if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) { + if (val) devmap->features |= DASD_FEATURE_USEDIAG; else devmap->features &= ~DASD_FEATURE_USEDIAG; @@ -694,30 +898,558 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr, const cha return rc; } -static -DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store); +static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store); + +/* + * use_raw controls whether the driver should give access to raw eckd data or + * operate in standard mode + */ +static ssize_t +dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_devmap *devmap; + int use_raw; + + devmap = dasd_find_busid(dev_name(dev)); + if (!IS_ERR(devmap)) + use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0; + else + use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0; + return sprintf(buf, use_raw ? "1\n" : "0\n"); +} static ssize_t -dasd_discipline_show(struct device *dev, struct device_attribute *attr, char *buf) +dasd_use_raw_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct dasd_devmap *devmap; - char *dname; + ssize_t rc; + unsigned long val; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + + if ((kstrtoul(buf, 10, &val) != 0) || val > 1) + return -EINVAL; spin_lock(&dasd_devmap_lock); - dname = "none"; - devmap = dev->driver_data; - if (devmap && devmap->device && devmap->device->discipline) - dname = devmap->device->discipline->name; + /* Changing diag discipline flag is only allowed in offline state. */ + rc = count; + if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) { + if (val) + devmap->features |= DASD_FEATURE_USERAW; + else + devmap->features &= ~DASD_FEATURE_USERAW; + } else + rc = -EPERM; spin_unlock(&dasd_devmap_lock); - return snprintf(buf, PAGE_SIZE, "%s\n", dname); + return rc; +} + +static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show, + dasd_use_raw_store); + +static ssize_t +dasd_safe_offline_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct ccw_device *cdev = to_ccwdev(dev); + struct dasd_device *device; + int rc; + + device = dasd_device_from_cdev(cdev); + if (IS_ERR(device)) { + rc = PTR_ERR(device); + goto out; + } + + if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || + test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { + /* Already doing offline processing */ + dasd_put_device(device); + rc = -EBUSY; + goto out; + } + + set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags); + dasd_put_device(device); + + rc = ccw_device_set_offline(cdev); + +out: + return rc ? rc : count; +} + +static DEVICE_ATTR(safe_offline, 0200, NULL, dasd_safe_offline_store); + +static ssize_t +dasd_discipline_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_device *device; + ssize_t len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + goto out; + else if (!device->discipline) { + dasd_put_device(device); + goto out; + } else { + len = snprintf(buf, PAGE_SIZE, "%s\n", + device->discipline->name); + dasd_put_device(device); + return len; + } +out: + len = snprintf(buf, PAGE_SIZE, "none\n"); + return len; } static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL); +static ssize_t +dasd_device_status_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_device *device; + ssize_t len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (!IS_ERR(device)) { + switch (device->state) { + case DASD_STATE_NEW: + len = snprintf(buf, PAGE_SIZE, "new\n"); + break; + case DASD_STATE_KNOWN: + len = snprintf(buf, PAGE_SIZE, "detected\n"); + break; + case DASD_STATE_BASIC: + len = snprintf(buf, PAGE_SIZE, "basic\n"); + break; + case DASD_STATE_UNFMT: + len = snprintf(buf, PAGE_SIZE, "unformatted\n"); + break; + case DASD_STATE_READY: + len = snprintf(buf, PAGE_SIZE, "ready\n"); + break; + case DASD_STATE_ONLINE: + len = snprintf(buf, PAGE_SIZE, "online\n"); + break; + default: + len = snprintf(buf, PAGE_SIZE, "no stat\n"); + break; + } + dasd_put_device(device); + } else + len = snprintf(buf, PAGE_SIZE, "unknown\n"); + return len; +} + +static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL); + +static ssize_t dasd_alias_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dasd_device *device; + struct dasd_uid uid; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return sprintf(buf, "0\n"); + + if (device->discipline && device->discipline->get_uid && + !device->discipline->get_uid(device, &uid)) { + if (uid.type == UA_BASE_PAV_ALIAS || + uid.type == UA_HYPER_PAV_ALIAS) { + dasd_put_device(device); + return sprintf(buf, "1\n"); + } + } + dasd_put_device(device); + + return sprintf(buf, "0\n"); +} + +static DEVICE_ATTR(alias, 0444, dasd_alias_show, NULL); + +static ssize_t dasd_vendor_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dasd_device *device; + struct dasd_uid uid; + char *vendor; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + vendor = ""; + if (IS_ERR(device)) + return snprintf(buf, PAGE_SIZE, "%s\n", vendor); + + if (device->discipline && device->discipline->get_uid && + !device->discipline->get_uid(device, &uid)) + vendor = uid.vendor; + + dasd_put_device(device); + + return snprintf(buf, PAGE_SIZE, "%s\n", vendor); +} + +static DEVICE_ATTR(vendor, 0444, dasd_vendor_show, NULL); + +#define UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 +\ + /* SSID */ 4 + 1 + /* unit addr */ 2 + 1 +\ + /* vduit */ 32 + 1) + +static ssize_t +dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_device *device; + struct dasd_uid uid; + char uid_string[UID_STRLEN]; + char ua_string[3]; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + uid_string[0] = 0; + if (IS_ERR(device)) + return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); + + if (device->discipline && device->discipline->get_uid && + !device->discipline->get_uid(device, &uid)) { + switch (uid.type) { + case UA_BASE_DEVICE: + snprintf(ua_string, sizeof(ua_string), "%02x", + uid.real_unit_addr); + break; + case UA_BASE_PAV_ALIAS: + snprintf(ua_string, sizeof(ua_string), "%02x", + uid.base_unit_addr); + break; + case UA_HYPER_PAV_ALIAS: + snprintf(ua_string, sizeof(ua_string), "xx"); + break; + default: + /* should not happen, treat like base device */ + snprintf(ua_string, sizeof(ua_string), "%02x", + uid.real_unit_addr); + break; + } + + if (strlen(uid.vduit) > 0) + snprintf(uid_string, sizeof(uid_string), + "%s.%s.%04x.%s.%s", + uid.vendor, uid.serial, uid.ssid, ua_string, + uid.vduit); + else + snprintf(uid_string, sizeof(uid_string), + "%s.%s.%04x.%s", + uid.vendor, uid.serial, uid.ssid, ua_string); + } + dasd_put_device(device); + + return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); +} +static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL); + +/* + * extended error-reporting + */ +static ssize_t +dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_devmap *devmap; + int eer_flag; + + devmap = dasd_find_busid(dev_name(dev)); + if (!IS_ERR(devmap) && devmap->device) + eer_flag = dasd_eer_enabled(devmap->device); + else + eer_flag = 0; + return snprintf(buf, PAGE_SIZE, eer_flag ? "1\n" : "0\n"); +} + +static ssize_t +dasd_eer_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_devmap *devmap; + int val, rc; + char *endp; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + if (!devmap->device) + return -ENODEV; + + val = simple_strtoul(buf, &endp, 0); + if (((endp + 1) < (buf + count)) || (val > 1)) + return -EINVAL; + + if (val) { + rc = dasd_eer_enable(devmap->device); + if (rc) + return rc; + } else + dasd_eer_disable(devmap->device); + return count; +} + +static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store); + +/* + * expiration time for default requests + */ +static ssize_t +dasd_expires_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_device *device; + int len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_expires); + dasd_put_device(device); + return len; +} + +static ssize_t +dasd_expires_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_device *device; + unsigned long val; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + + if ((kstrtoul(buf, 10, &val) != 0) || + (val > DASD_EXPIRES_MAX) || val == 0) { + dasd_put_device(device); + return -EINVAL; + } + + if (val) + device->default_expires = val; + + dasd_put_device(device); + return count; +} + +static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store); + +static ssize_t +dasd_retries_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_device *device; + int len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_retries); + dasd_put_device(device); + return len; +} + +static ssize_t +dasd_retries_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_device *device; + unsigned long val; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + + if ((kstrtoul(buf, 10, &val) != 0) || + (val > DASD_RETRIES_MAX)) { + dasd_put_device(device); + return -EINVAL; + } + + if (val) + device->default_retries = val; + + dasd_put_device(device); + return count; +} + +static DEVICE_ATTR(retries, 0644, dasd_retries_show, dasd_retries_store); + +static ssize_t +dasd_timeout_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_device *device; + int len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + len = snprintf(buf, PAGE_SIZE, "%lu\n", device->blk_timeout); + dasd_put_device(device); + return len; +} + +static ssize_t +dasd_timeout_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_device *device; + struct request_queue *q; + unsigned long val, flags; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device) || !device->block) + return -ENODEV; + + if ((kstrtoul(buf, 10, &val) != 0) || + val > UINT_MAX / HZ) { + dasd_put_device(device); + return -EINVAL; + } + q = device->block->request_queue; + if (!q) { + dasd_put_device(device); + return -ENODEV; + } + spin_lock_irqsave(&device->block->request_queue_lock, flags); + if (!val) + blk_queue_rq_timed_out(q, NULL); + else + blk_queue_rq_timed_out(q, dasd_times_out); + + device->blk_timeout = val; + + blk_queue_rq_timeout(q, device->blk_timeout * HZ); + spin_unlock_irqrestore(&device->block->request_queue_lock, flags); + + dasd_put_device(device); + return count; +} + +static DEVICE_ATTR(timeout, 0644, + dasd_timeout_show, dasd_timeout_store); + +static ssize_t dasd_reservation_policy_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dasd_devmap *devmap; + int rc = 0; + + devmap = dasd_find_busid(dev_name(dev)); + if (IS_ERR(devmap)) { + rc = snprintf(buf, PAGE_SIZE, "ignore\n"); + } else { + spin_lock(&dasd_devmap_lock); + if (devmap->features & DASD_FEATURE_FAILONSLCK) + rc = snprintf(buf, PAGE_SIZE, "fail\n"); + else + rc = snprintf(buf, PAGE_SIZE, "ignore\n"); + spin_unlock(&dasd_devmap_lock); + } + return rc; +} + +static ssize_t dasd_reservation_policy_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_devmap *devmap; + int rc; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + rc = 0; + spin_lock(&dasd_devmap_lock); + if (sysfs_streq("ignore", buf)) + devmap->features &= ~DASD_FEATURE_FAILONSLCK; + else if (sysfs_streq("fail", buf)) + devmap->features |= DASD_FEATURE_FAILONSLCK; + else + rc = -EINVAL; + if (devmap->device) + devmap->device->features = devmap->features; + spin_unlock(&dasd_devmap_lock); + if (rc) + return rc; + else + return count; +} + +static DEVICE_ATTR(reservation_policy, 0644, + dasd_reservation_policy_show, dasd_reservation_policy_store); + +static ssize_t dasd_reservation_state_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dasd_device *device; + int rc = 0; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return snprintf(buf, PAGE_SIZE, "none\n"); + + if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) + rc = snprintf(buf, PAGE_SIZE, "reserved\n"); + else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) + rc = snprintf(buf, PAGE_SIZE, "lost\n"); + else + rc = snprintf(buf, PAGE_SIZE, "none\n"); + dasd_put_device(device); + return rc; +} + +static ssize_t dasd_reservation_state_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_device *device; + int rc = 0; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + if (sysfs_streq("reset", buf)) + clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); + else + rc = -EINVAL; + dasd_put_device(device); + + if (rc) + return rc; + else + return count; +} + +static DEVICE_ATTR(last_known_reservation_state, 0644, + dasd_reservation_state_show, dasd_reservation_state_store); + static struct attribute * dasd_attrs[] = { &dev_attr_readonly.attr, &dev_attr_discipline.attr, + &dev_attr_status.attr, + &dev_attr_alias.attr, + &dev_attr_vendor.attr, + &dev_attr_uid.attr, &dev_attr_use_diag.attr, + &dev_attr_raw_track_access.attr, + &dev_attr_eer_enabled.attr, + &dev_attr_erplog.attr, + &dev_attr_failfast.attr, + &dev_attr_expires.attr, + &dev_attr_retries.attr, + &dev_attr_timeout.attr, + &dev_attr_reservation_policy.attr, + &dev_attr_last_known_reservation_state.attr, + &dev_attr_safe_offline.attr, NULL, }; @@ -733,32 +1465,33 @@ dasd_get_feature(struct ccw_device *cdev, int feature) { struct dasd_devmap *devmap; - devmap = dasd_find_busid(cdev->dev.bus_id); + devmap = dasd_find_busid(dev_name(&cdev->dev)); if (IS_ERR(devmap)) - return (int) PTR_ERR(devmap); + return PTR_ERR(devmap); return ((devmap->features & feature) != 0); } /* * Set / reset given feature. - * Flag indicates wether to set (!=0) or the reset (=0) the feature. + * Flag indicates whether to set (!=0) or the reset (=0) the feature. */ int dasd_set_feature(struct ccw_device *cdev, int feature, int flag) { struct dasd_devmap *devmap; - devmap = dasd_find_busid(cdev->dev.bus_id); + devmap = dasd_find_busid(dev_name(&cdev->dev)); if (IS_ERR(devmap)) - return (int) PTR_ERR(devmap); + return PTR_ERR(devmap); spin_lock(&dasd_devmap_lock); if (flag) devmap->features |= feature; else devmap->features &= ~feature; - + if (devmap->device) + devmap->device->features = devmap->features; spin_unlock(&dasd_devmap_lock); return 0; } @@ -787,7 +1520,6 @@ dasd_devmap_init(void) for (i = 0; i < 256; i++) INIT_LIST_HEAD(&dasd_hashlists[i]); return 0; - } void |