};
struct ocfs2_slot_info {
+ int si_extended;
+ int si_slots_per_block;
struct inode *si_inode;
unsigned int si_blocks;
struct buffer_head **si_bh;
int slot_num, unsigned int node_num)
{
BUG_ON((slot_num < 0) || (slot_num >= si->si_num_slots));
- BUG_ON((node_num == O2NM_INVALID_NODE_NUM) ||
- (node_num >= O2NM_MAX_NODES));
si->si_slots[slot_num].sl_valid = 1;
si->si_slots[slot_num].sl_node_num = node_num;
}
+/* This version is for the extended slot map */
+static void ocfs2_update_slot_info_extended(struct ocfs2_slot_info *si)
+{
+ int b, i, slotno;
+ struct ocfs2_slot_map_extended *se;
+
+ slotno = 0;
+ for (b = 0; b < si->si_blocks; b++) {
+ se = (struct ocfs2_slot_map_extended *)si->si_bh[b]->b_data;
+ for (i = 0;
+ (i < si->si_slots_per_block) &&
+ (slotno < si->si_num_slots);
+ i++, slotno++) {
+ if (se->se_slots[i].es_valid)
+ ocfs2_set_slot(si, slotno,
+ le32_to_cpu(se->se_slots[i].es_node_num));
+ else
+ ocfs2_invalidate_slot(si, slotno);
+ }
+ }
+}
+
/*
* Post the slot information on disk into our slot_info struct.
* Must be protected by osb_lock.
*/
-static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
+static void ocfs2_update_slot_info_old(struct ocfs2_slot_info *si)
{
int i;
struct ocfs2_slot_map *sm;
- /* we don't read the slot block here as ocfs2_super_lock
- * should've made sure we have the most recent copy. */
sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data;
for (i = 0; i < si->si_num_slots; i++) {
}
}
+static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
+{
+ /*
+ * The slot data will have been refreshed when ocfs2_super_lock
+ * was taken.
+ */
+ if (si->si_extended)
+ ocfs2_update_slot_info_extended(si);
+ else
+ ocfs2_update_slot_info_old(si);
+}
+
int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
{
int ret;
* 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(osb, -1, si->si_blocks, si->si_bh, 0,
- si->si_inode);
+ ret = ocfs2_read_blocks(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);
/* post the our slot info stuff into it's destination bh and write it
* out. */
-static int ocfs2_update_disk_slots(struct ocfs2_super *osb,
- struct ocfs2_slot_info *si)
+static void ocfs2_update_disk_slot_extended(struct ocfs2_slot_info *si,
+ int slot_num,
+ struct buffer_head **bh)
+{
+ int blkind = slot_num / si->si_slots_per_block;
+ int slotno = slot_num % si->si_slots_per_block;
+ struct ocfs2_slot_map_extended *se;
+
+ BUG_ON(blkind >= si->si_blocks);
+
+ se = (struct ocfs2_slot_map_extended *)si->si_bh[blkind]->b_data;
+ se->se_slots[slotno].es_valid = si->si_slots[slot_num].sl_valid;
+ if (si->si_slots[slot_num].sl_valid)
+ se->se_slots[slotno].es_node_num =
+ cpu_to_le32(si->si_slots[slot_num].sl_node_num);
+ *bh = si->si_bh[blkind];
+}
+
+static void ocfs2_update_disk_slot_old(struct ocfs2_slot_info *si,
+ int slot_num,
+ struct buffer_head **bh)
{
- int status, i;
+ int i;
struct ocfs2_slot_map *sm;
- spin_lock(&osb->osb_lock);
sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data;
for (i = 0; i < si->si_num_slots; i++) {
if (si->si_slots[i].sl_valid)
else
sm->sm_slots[i] = cpu_to_le16(OCFS2_INVALID_SLOT);
}
+ *bh = si->si_bh[0];
+}
+
+static int ocfs2_update_disk_slot(struct ocfs2_super *osb,
+ struct ocfs2_slot_info *si,
+ int slot_num)
+{
+ int status;
+ struct buffer_head *bh;
+
+ spin_lock(&osb->osb_lock);
+ if (si->si_extended)
+ ocfs2_update_disk_slot_extended(si, slot_num, &bh);
+ else
+ ocfs2_update_disk_slot_old(si, slot_num, &bh);
spin_unlock(&osb->osb_lock);
- status = ocfs2_write_block(osb, si->si_bh[0], si->si_inode);
+ status = ocfs2_write_block(osb, bh, si->si_inode);
if (status < 0)
mlog_errno(status);
{
unsigned long long bytes_needed;
- bytes_needed = osb->max_slots * sizeof(__le16);
+ if (ocfs2_uses_extended_slot_map(osb)) {
+ bytes_needed = osb->max_slots *
+ sizeof(struct ocfs2_extended_slot);
+ } else {
+ bytes_needed = osb->max_slots * sizeof(__le16);
+ }
if (bytes_needed > i_size_read(inode)) {
mlog(ML_ERROR,
"Slot map file is too small! (size %llu, needed %llu)\n",
ocfs2_invalidate_slot(si, slot_num);
spin_unlock(&osb->osb_lock);
- return ocfs2_update_disk_slots(osb, osb->slot_info);
+ return ocfs2_update_disk_slot(osb, osb->slot_info, slot_num);
}
static int ocfs2_map_slot_buffers(struct ocfs2_super *osb,
if (!si->si_blocks)
goto bail;
+ if (si->si_extended)
+ si->si_slots_per_block =
+ (osb->sb->s_blocksize /
+ sizeof(struct ocfs2_extended_slot));
+ else
+ si->si_slots_per_block = osb->sb->s_blocksize / sizeof(__le16);
+
+ /* The size checks above should ensure this */
+ BUG_ON((osb->max_slots / si->si_slots_per_block) > blocks);
+
mlog(0, "Slot map needs %u buffers for %llu bytes\n",
si->si_blocks, bytes);
(unsigned long long)blkno);
bh = NULL; /* Acquire a fresh bh */
- status = ocfs2_read_block(osb, blkno, &bh, 0, si->si_inode);
+ status = ocfs2_read_blocks(si->si_inode, blkno, 1, &bh,
+ OCFS2_BH_IGNORE_CACHE, NULL);
if (status < 0) {
mlog_errno(status);
goto bail;
goto bail;
}
+ si->si_extended = ocfs2_uses_extended_slot_map(osb);
si->si_num_slots = osb->max_slots;
si->si_slots = (struct ocfs2_slot *)((char *)si +
sizeof(struct ocfs2_slot_info));
mlog(0, "taking node slot %d\n", osb->slot_num);
- status = ocfs2_update_disk_slots(osb, si);
+ status = ocfs2_update_disk_slot(osb, si, osb->slot_num);
if (status < 0)
mlog_errno(status);
void ocfs2_put_slot(struct ocfs2_super *osb)
{
- int status;
+ int status, slot_num;
struct ocfs2_slot_info *si = osb->slot_info;
if (!si)
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_slots(osb, si);
+ status = ocfs2_update_disk_slot(osb, si, slot_num);
if (status < 0) {
mlog_errno(status);
goto bail;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff