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authorDan Williams <dan.j.williams@intel.com>2010-05-02 10:04:16 -0700
committerNeilBrown <neilb@suse.de>2010-05-18 15:27:58 +1000
commitf2859af6716ce99cac7f35c5a0c6b7fed346312f (patch)
tree37d1af49ce710098bc35d45c7a9aec6e6f8eb5d9 /drivers/md
parentbb7f8d2217d8753ab5008c78f16697d9e697d570 (diff)
md: allow integers to be passed to md/level
e.g. allow md to interpret 'echo 4 > md/level' as a request for raid4. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/md.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 69f659e46aa6..b8a0fcfb1de1 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2934,9 +2934,10 @@ level_show(mddev_t *mddev, char *page)
static ssize_t
level_store(mddev_t *mddev, const char *buf, size_t len)
{
- char level[16];
+ char clevel[16];
ssize_t rv = len;
struct mdk_personality *pers;
+ long level;
void *priv;
mdk_rdev_t *rdev;
@@ -2969,19 +2970,22 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
}
/* Now find the new personality */
- if (len == 0 || len >= sizeof(level))
+ if (len == 0 || len >= sizeof(clevel))
return -EINVAL;
- strncpy(level, buf, len);
- if (level[len-1] == '\n')
+ strncpy(clevel, buf, len);
+ if (clevel[len-1] == '\n')
len--;
- level[len] = 0;
+ clevel[len] = 0;
+ if (strict_strtol(clevel, 10, &level))
+ level = LEVEL_NONE;
- request_module("md-%s", level);
+ if (request_module("md-%s", clevel) != 0)
+ request_module("md-level-%s", clevel);
spin_lock(&pers_lock);
- pers = find_pers(LEVEL_NONE, level);
+ pers = find_pers(level, clevel);
if (!pers || !try_module_get(pers->owner)) {
spin_unlock(&pers_lock);
- printk(KERN_WARNING "md: personality %s not loaded\n", level);
+ printk(KERN_WARNING "md: personality %s not loaded\n", clevel);
return -EINVAL;
}
spin_unlock(&pers_lock);
@@ -2994,7 +2998,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
if (!pers->takeover) {
module_put(pers->owner);
printk(KERN_WARNING "md: %s: %s does not support personality takeover\n",
- mdname(mddev), level);
+ mdname(mddev), clevel);
return -EINVAL;
}
@@ -3010,7 +3014,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
mddev->delta_disks = 0;
module_put(pers->owner);
printk(KERN_WARNING "md: %s: %s would not accept array\n",
- mdname(mddev), level);
+ mdname(mddev), clevel);
return PTR_ERR(priv);
}