int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
{
int ret;
struct ocfs2_slot_info *si = osb->slot_info;
if (si == NULL)
return 0;
BUG_ON(si->si_blocks == 0);
BUG_ON(si->si_bh == NULL);
trace_ocfs2_refresh_slot_info(si->si_blocks);
/*
* We pass -1 as blocknr because we expect all of si->si_bh to
* be !NULL. Thus, ocfs2_read_blocks() will ignore blocknr. If
* this is not true, the read of -1 (UINT64_MAX) will fail.
*/
ret = ocfs2_read_blocks(INODE_CACHE(si->si_inode), -1, si->si_blocks,
si->si_bh, OCFS2_BH_IGNORE_CACHE, NULL);
if (ret == 0) {
spin_lock(&osb->osb_lock);
ocfs2_update_slot_info(si);
spin_unlock(&osb->osb_lock);
}
return ret;
}
void ocfs2_put_slot(struct ocfs2_super *osb)
{
int status, slot_num;
struct ocfs2_slot_info *si = osb->slot_info;
if (!si)
return;
spin_lock(&osb->osb_lock);
ocfs2_update_slot_info(si);
slot_num = osb->slot_num;
ocfs2_invalidate_slot(si, osb->slot_num);
osb->slot_num = OCFS2_INVALID_SLOT;
spin_unlock(&osb->osb_lock);
status = ocfs2_update_disk_slot(osb, si, slot_num);
if (status < 0) {
mlog_errno(status);
goto bail;
}
bail:
ocfs2_free_slot_info(osb);
}
int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
{
int ret;
struct ocfs2_slot_info *si = osb->slot_info;
if (si == NULL)
return 0;
BUG_ON(si->si_blocks == 0);
BUG_ON(si->si_bh == NULL);
trace_ocfs2_refresh_slot_info(si->si_blocks);
/*
*/
ret = ocfs2_read_blocks(INODE_CACHE(si->si_inode), -1, si->si_blocks,
si->si_bh, OCFS2_BH_IGNORE_CACHE, NULL);
if (ret == 0) {
spin_lock(&osb->osb_lock);
ocfs2_update_slot_info(si);
spin_unlock(&osb->osb_lock);
}
return ret;
}
void ocfs2_put_slot(struct ocfs2_super *osb)
{
int status;
struct ocfs2_slot_info *si = osb->slot_info;
if (!si)
return;
ocfs2_update_slot_info(si);
spin_lock(&si->si_lock);
__ocfs2_fill_slot(si, osb->slot_num, OCFS2_INVALID_SLOT);
osb->slot_num = OCFS2_INVALID_SLOT;
spin_unlock(&si->si_lock);
status = ocfs2_update_disk_slots(osb, si);
if (status < 0) {
mlog_errno(status);
goto bail;
}
bail:
osb->slot_info = NULL;
ocfs2_free_slot_info(si);
}
int ocfs2_find_slot(struct ocfs2_super *osb)
{
int status;
int slot;
struct ocfs2_slot_info *si;
si = osb->slot_info;
spin_lock(&osb->osb_lock);
ocfs2_update_slot_info(si);
/* search for ourselves first and take the slot if it already
* exists. Perhaps we need to mark this in a variable for our
* own journal recovery? Possibly not, though we certainly
* need to warn to the user */
slot = __ocfs2_node_num_to_slot(si, osb->node_num);
if (slot < 0) {
/* if no slot yet, then just take 1st available
* one. */
slot = __ocfs2_find_empty_slot(si, osb->preferred_slot);
if (slot < 0) {
spin_unlock(&osb->osb_lock);
mlog(ML_ERROR, "no free slots available!\n");
status = -EINVAL;
goto bail;
}
} else
printk(KERN_INFO "ocfs2: Slot %d on device (%s) was already "
"allocated to this node!\n", slot, osb->dev_str);
ocfs2_set_slot(si, slot, osb->node_num);
osb->slot_num = slot;
spin_unlock(&osb->osb_lock);
trace_ocfs2_find_slot(osb->slot_num);
status = ocfs2_update_disk_slot(osb, si, osb->slot_num);
if (status < 0) {
mlog_errno(status);
/*
* if write block failed, invalidate slot to avoid overwrite
* slot during dismount in case another node rightly has mounted
*/
spin_lock(&osb->osb_lock);
ocfs2_invalidate_slot(si, osb->slot_num);
osb->slot_num = OCFS2_INVALID_SLOT;
spin_unlock(&osb->osb_lock);
}
bail:
return status;
}
int ocfs2_find_slot(struct ocfs2_super *osb)
{
int status;
s16 slot;
struct ocfs2_slot_info *si;
mlog_entry_void();
si = osb->slot_info;
ocfs2_update_slot_info(si);
spin_lock(&si->si_lock);
/* search for ourselves first and take the slot if it already
* exists. Perhaps we need to mark this in a variable for our
* own journal recovery? Possibly not, though we certainly
* need to warn to the user */
slot = __ocfs2_node_num_to_slot(si, osb->node_num);
if (slot == OCFS2_INVALID_SLOT) {
/* if no slot yet, then just take 1st available
* one. */
slot = __ocfs2_find_empty_slot(si);
if (slot == OCFS2_INVALID_SLOT) {
spin_unlock(&si->si_lock);
mlog(ML_ERROR, "no free slots available!\n");
status = -EINVAL;
goto bail;
}
} else
mlog(ML_NOTICE, "slot %d is already allocated to this node!\n",
slot);
__ocfs2_fill_slot(si, slot, osb->node_num);
osb->slot_num = slot;
spin_unlock(&si->si_lock);
mlog(0, "taking node slot %d\n", osb->slot_num);
status = ocfs2_update_disk_slots(osb, si);
if (status < 0)
mlog_errno(status);
bail:
mlog_exit(status);
return status;
}
int ocfs2_find_slot(struct ocfs2_super *osb)
{
int status;
int slot;
struct ocfs2_slot_info *si;
si = osb->slot_info;
spin_lock(&osb->osb_lock);
ocfs2_update_slot_info(si);
/*
*/
slot = __ocfs2_node_num_to_slot(si, osb->node_num);
if (slot < 0) {
/*
*/
slot = __ocfs2_find_empty_slot(si, osb->preferred_slot);
if (slot < 0) {
spin_unlock(&osb->osb_lock);
mlog(ML_ERROR, "no free slots available!\n");
status = -EINVAL;
goto bail;
}
} else
printk(KERN_INFO "ocfs2: Slot %d on device (%s) was already "
"allocated to this node!\n", slot, osb->dev_str);
ocfs2_set_slot(si, slot, osb->node_num);
osb->slot_num = slot;
spin_unlock(&osb->osb_lock);
trace_ocfs2_find_slot(osb->slot_num);
status = ocfs2_update_disk_slot(osb, si, osb->slot_num);
if (status < 0)
mlog_errno(status);
bail:
return status;
}