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authorNeil Brown <neilb@suse.de>2007-08-23 01:39:24 +0200
committerAdrian Bunk <bunk@stusta.de>2007-08-23 01:39:24 +0200
commit4d5eb09cab94fac8cfb767617a4799220f1874ab (patch)
tree6a302a3c6cfb1b7131698c4187e1dc1a383505f3
parentb3188291b5c6a9f9c2d6da21ef3f6d02f47d6c2e (diff)
md: fix a few problems with the interface (sysfs and ioctl) to md
While developing more functionality in mdadm I found some bugs in md... - When we remove a device from an inactive array (write 'remove' to the 'state' sysfs file - see 'state_store') would should not update the superblock information - as we may not have read and processed it all properly yet. - initialise all raid_disk entries to '-1' else the 'slot sysfs file will claim '0' for all devices in an array before the array is started. - all '\n' not to be present at the end of words written to sysfs files - when we use SET_ARRAY_INFO to set the md metadata version, set the flag to say that there is persistant metadata. - allow GET_BITMAP_FILE to be called on an array that hasn't been started yet. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Adrian Bunk <bunk@kernel.org>
-rw-r--r--drivers/md/md.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 319b86fe2595..b6134c42c760 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1818,6 +1818,7 @@ static mdk_rdev_t *md_import_device(dev_t newdev, int super_format, int super_mi
rdev->desc_nr = -1;
rdev->saved_raid_disk = -1;
+ rdev->raid_disk = -1;
rdev->flags = 0;
rdev->data_offset = 0;
atomic_set(&rdev->nr_pending, 0);
@@ -1972,7 +1973,6 @@ static int update_raid_disks(mddev_t *mddev, int raid_disks);
static ssize_t
raid_disks_store(mddev_t *mddev, const char *buf, size_t len)
{
- /* can only set raid_disks if array is not yet active */
char *e;
int rv = 0;
unsigned long n = simple_strtoul(buf, &e, 10);
@@ -2145,7 +2145,7 @@ metadata_store(mddev_t *mddev, const char *buf, size_t len)
return -EINVAL;
buf = e+1;
minor = simple_strtoul(buf, &e, 10);
- if (e==buf || *e != '\n')
+ if (e==buf || (*e && *e != '\n') )
return -EINVAL;
if (major >= sizeof(super_types)/sizeof(super_types[0]) ||
super_types[major].name == NULL)
@@ -3416,6 +3416,7 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info)
mddev->major_version = info->major_version;
mddev->minor_version = info->minor_version;
mddev->patch_version = info->patch_version;
+ mddev->persistent = !info->not_persistent;
return 0;
}
mddev->major_version = MD_MAJOR_VERSION;
@@ -3754,9 +3755,10 @@ static int md_ioctl(struct inode *inode, struct file *file,
* Commands querying/configuring an existing array:
*/
/* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY,
- * RUN_ARRAY, and SET_BITMAP_FILE are allowed */
+ * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */
if (!mddev->raid_disks && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY
- && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE) {
+ && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE
+ && cmd != GET_BITMAP_FILE) {
err = -ENODEV;
goto abort_unlock;
}