diff options
| author |   Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2011-03-11 20:06:09 +0100 |
|---|---|---|
| committer |   Jens Axboe <jaxboe@fusionio.com> | 2011-03-11 20:06:09 +0100 |
| commit | 957c2ec558caff09a3bdf333871fc617830f063d (patch) | |
| tree | 3ab03b18177a7381c511f165411cc00383177824 /drivers | |
| parent | drbd: drop code present under #ifdef which is relevant to 2.6.28 and below (diff) | |
| download | linux-dev-957c2ec558caff09a3bdf333871fc617830f063d.tar.xz linux-dev-957c2ec558caff09a3bdf333871fc617830f063d.zip | |
cciss: export resettable host attribute
This attribute, requested by Redhat, allows kexec-tools to know
whether the controller can honor the reset_devices kernel parameter
and actually reset the controller. For kdump to work properly it
is necessary that the reset_devices parameter be honored. This
attribute enables kexec-tools to warn the user if they attempt to
designate a non-resettable controller as the dump device.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/cciss.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 35658f445fca..eeed7aeb0b83 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -556,6 +556,44 @@ static void __devinit cciss_procinit(ctlr_info_t *h) #define to_hba(n) container_of(n, struct ctlr_info, dev) #define to_drv(n) container_of(n, drive_info_struct, dev) +/* List of controllers which cannot be reset on kexec with reset_devices */ +static u32 unresettable_controller[] = { + 0x324a103C, /* Smart Array P712m */ + 0x324b103C, /* SmartArray P711m */ + 0x3223103C, /* Smart Array P800 */ + 0x3234103C, /* Smart Array P400 */ + 0x3235103C, /* Smart Array P400i */ + 0x3211103C, /* Smart Array E200i */ + 0x3212103C, /* Smart Array E200 */ + 0x3213103C, /* Smart Array E200i */ + 0x3214103C, /* Smart Array E200i */ + 0x3215103C, /* Smart Array E200i */ + 0x3237103C, /* Smart Array E500 */ + 0x323D103C, /* Smart Array P700m */ + 0x409C0E11, /* Smart Array 6400 */ + 0x409D0E11, /* Smart Array 6400 EM */ +}; + +static int ctlr_is_resettable(struct ctlr_info *h) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++) + if (unresettable_controller[i] == h->board_id) + return 0; + return 1; +} + +static ssize_t host_show_resettable(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ctlr_info *h = to_hba(dev); + + return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h)); +} +static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL); + static ssize_t host_store_rescan(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -741,6 +779,7 @@ static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); static struct attribute *cciss_host_attrs[] = { &dev_attr_rescan.attr, + &dev_attr_resettable.attr, NULL }; |