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ocfs2: Make ocfs2_slot_info private.
Just use osb_lock around the ocfs2_slot_info data. This allows us to take the ocfs2_slot_info structure private in slot_info.c. All access is now via accessors. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Joel Becker
Mark Fasheh
parent
8e8a4603b5
commit
d85b20e4b3
@ -1079,7 +1079,6 @@ static int ocfs2_recover_node(struct ocfs2_super *osb,
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{
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int status = 0;
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int slot_num;
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struct ocfs2_slot_info *si = osb->slot_info;
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struct ocfs2_dinode *la_copy = NULL;
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struct ocfs2_dinode *tl_copy = NULL;
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@ -1092,8 +1091,8 @@ static int ocfs2_recover_node(struct ocfs2_super *osb,
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* case we should've called ocfs2_journal_load instead. */
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BUG_ON(osb->node_num == node_num);
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slot_num = ocfs2_node_num_to_slot(si, node_num);
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if (slot_num == OCFS2_INVALID_SLOT) {
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slot_num = ocfs2_node_num_to_slot(osb, node_num);
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if (slot_num == -ENOENT) {
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status = 0;
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mlog(0, "no slot for this node, so no recovery required.\n");
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goto done;
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@ -1183,23 +1182,24 @@ static int ocfs2_trylock_journal(struct ocfs2_super *osb,
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* slot info struct has been updated from disk. */
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int ocfs2_mark_dead_nodes(struct ocfs2_super *osb)
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{
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int status, i, node_num;
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struct ocfs2_slot_info *si = osb->slot_info;
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unsigned int node_num;
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int status, i;
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/* This is called with the super block cluster lock, so we
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* know that the slot map can't change underneath us. */
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spin_lock(&si->si_lock);
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for(i = 0; i < si->si_num_slots; i++) {
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spin_lock(&osb->osb_lock);
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for (i = 0; i < osb->max_slots; i++) {
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if (i == osb->slot_num)
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continue;
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if (ocfs2_is_empty_slot(si, i))
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status = ocfs2_slot_to_node_num_locked(osb, i, &node_num);
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if (status == -ENOENT)
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continue;
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node_num = si->si_global_node_nums[i];
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if (ocfs2_node_map_test_bit(osb, &osb->recovery_map, node_num))
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continue;
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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/* Ok, we have a slot occupied by another node which
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* is not in the recovery map. We trylock his journal
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@ -1215,9 +1215,9 @@ int ocfs2_mark_dead_nodes(struct ocfs2_super *osb)
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goto bail;
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}
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spin_lock(&si->si_lock);
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spin_lock(&osb->osb_lock);
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}
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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status = 0;
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bail:
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@ -179,6 +179,7 @@ enum ocfs2_mount_options
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#define OCFS2_DEFAULT_ATIME_QUANTUM 60
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struct ocfs2_journal;
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struct ocfs2_slot_info;
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struct ocfs2_super
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{
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struct task_struct *commit_task;
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@ -42,13 +42,25 @@
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#include "buffer_head_io.h"
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struct ocfs2_slot_info {
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struct inode *si_inode;
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struct buffer_head *si_bh;
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unsigned int si_num_slots;
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unsigned int si_size;
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s16 si_global_node_nums[OCFS2_MAX_SLOTS];
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};
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static s16 __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
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s16 global);
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static void __ocfs2_fill_slot(struct ocfs2_slot_info *si,
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s16 slot_num,
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s16 node_num);
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/* post the slot information on disk into our slot_info struct. */
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/*
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* Post the slot information on disk into our slot_info struct.
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* Must be protected by osb_lock.
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*/
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static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
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{
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int i;
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@ -56,13 +68,10 @@ static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
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/* we don't read the slot block here as ocfs2_super_lock
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* should've made sure we have the most recent copy. */
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spin_lock(&si->si_lock);
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disk_info = (__le16 *) si->si_bh->b_data;
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for (i = 0; i < si->si_size; i++)
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si->si_global_node_nums[i] = le16_to_cpu(disk_info[i]);
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spin_unlock(&si->si_lock);
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}
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int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
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@ -76,8 +85,11 @@ int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
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bh = si->si_bh;
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ret = ocfs2_read_block(osb, bh->b_blocknr, &bh, 0, si->si_inode);
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if (ret == 0)
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if (ret == 0) {
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spin_lock(&osb->osb_lock);
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ocfs2_update_slot_info(si);
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spin_unlock(&osb->osb_lock);
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}
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return ret;
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}
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@ -90,10 +102,10 @@ static int ocfs2_update_disk_slots(struct ocfs2_super *osb,
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int status, i;
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__le16 *disk_info = (__le16 *) si->si_bh->b_data;
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spin_lock(&si->si_lock);
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spin_lock(&osb->osb_lock);
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for (i = 0; i < si->si_size; i++)
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disk_info[i] = cpu_to_le16(si->si_global_node_nums[i]);
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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status = ocfs2_write_block(osb, si->si_bh, si->si_inode);
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if (status < 0)
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@ -119,7 +131,8 @@ static s16 __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
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return ret;
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}
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static s16 __ocfs2_find_empty_slot(struct ocfs2_slot_info *si, s16 preferred)
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static s16 __ocfs2_find_empty_slot(struct ocfs2_slot_info *si,
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s16 preferred)
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{
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int i;
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s16 ret = OCFS2_INVALID_SLOT;
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@ -141,15 +154,36 @@ static s16 __ocfs2_find_empty_slot(struct ocfs2_slot_info *si, s16 preferred)
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return ret;
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}
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s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
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s16 global)
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int ocfs2_node_num_to_slot(struct ocfs2_super *osb, unsigned int node_num)
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{
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s16 ret;
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s16 slot;
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struct ocfs2_slot_info *si = osb->slot_info;
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spin_lock(&si->si_lock);
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ret = __ocfs2_node_num_to_slot(si, global);
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spin_unlock(&si->si_lock);
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return ret;
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spin_lock(&osb->osb_lock);
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slot = __ocfs2_node_num_to_slot(si, node_num);
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spin_unlock(&osb->osb_lock);
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if (slot == OCFS2_INVALID_SLOT)
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return -ENOENT;
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return slot;
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}
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int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num,
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unsigned int *node_num)
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{
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struct ocfs2_slot_info *si = osb->slot_info;
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assert_spin_locked(&osb->osb_lock);
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BUG_ON(slot_num < 0);
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BUG_ON(slot_num > osb->max_slots);
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if (si->si_global_node_nums[slot_num] == OCFS2_INVALID_SLOT)
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return -ENOENT;
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*node_num = si->si_global_node_nums[slot_num];
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return 0;
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}
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static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si)
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@ -184,9 +218,9 @@ int ocfs2_clear_slot(struct ocfs2_super *osb, s16 slot_num)
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if (si == NULL)
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return 0;
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spin_lock(&si->si_lock);
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spin_lock(&osb->osb_lock);
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__ocfs2_fill_slot(si, slot_num, OCFS2_INVALID_SLOT);
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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return ocfs2_update_disk_slots(osb, osb->slot_info);
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}
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@ -206,7 +240,6 @@ int ocfs2_init_slot_info(struct ocfs2_super *osb)
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goto bail;
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}
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spin_lock_init(&si->si_lock);
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si->si_num_slots = osb->max_slots;
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si->si_size = OCFS2_MAX_SLOTS;
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@ -235,7 +268,7 @@ int ocfs2_init_slot_info(struct ocfs2_super *osb)
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si->si_inode = inode;
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si->si_bh = bh;
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osb->slot_info = si;
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osb->slot_info = (struct ocfs2_slot_info *)si;
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bail:
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if (status < 0 && si)
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__ocfs2_free_slot_info(si);
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@ -261,9 +294,9 @@ int ocfs2_find_slot(struct ocfs2_super *osb)
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si = osb->slot_info;
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spin_lock(&osb->osb_lock);
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ocfs2_update_slot_info(si);
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spin_lock(&si->si_lock);
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/* search for ourselves first and take the slot if it already
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* exists. Perhaps we need to mark this in a variable for our
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* own journal recovery? Possibly not, though we certainly
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@ -274,7 +307,7 @@ int ocfs2_find_slot(struct ocfs2_super *osb)
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* one. */
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slot = __ocfs2_find_empty_slot(si, osb->preferred_slot);
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if (slot == OCFS2_INVALID_SLOT) {
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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mlog(ML_ERROR, "no free slots available!\n");
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status = -EINVAL;
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goto bail;
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@ -285,7 +318,7 @@ int ocfs2_find_slot(struct ocfs2_super *osb)
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__ocfs2_fill_slot(si, slot, osb->node_num);
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osb->slot_num = slot;
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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mlog(0, "taking node slot %d\n", osb->slot_num);
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@ -306,12 +339,12 @@ void ocfs2_put_slot(struct ocfs2_super *osb)
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if (!si)
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return;
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spin_lock(&osb->osb_lock);
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ocfs2_update_slot_info(si);
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spin_lock(&si->si_lock);
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__ocfs2_fill_slot(si, osb->slot_num, OCFS2_INVALID_SLOT);
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osb->slot_num = OCFS2_INVALID_SLOT;
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spin_unlock(&si->si_lock);
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spin_unlock(&osb->osb_lock);
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status = ocfs2_update_disk_slots(osb, si);
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if (status < 0) {
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@ -27,16 +27,6 @@
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#ifndef SLOTMAP_H
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#define SLOTMAP_H
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struct ocfs2_slot_info {
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spinlock_t si_lock;
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struct inode *si_inode;
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struct buffer_head *si_bh;
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unsigned int si_num_slots;
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unsigned int si_size;
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s16 si_global_node_nums[OCFS2_MAX_SLOTS];
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};
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int ocfs2_init_slot_info(struct ocfs2_super *osb);
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void ocfs2_free_slot_info(struct ocfs2_super *osb);
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@ -45,17 +35,10 @@ void ocfs2_put_slot(struct ocfs2_super *osb);
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int ocfs2_refresh_slot_info(struct ocfs2_super *osb);
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s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
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s16 global);
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int ocfs2_node_num_to_slot(struct ocfs2_super *osb, unsigned int node_num);
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int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num,
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unsigned int *node_num);
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int ocfs2_clear_slot(struct ocfs2_super *osb, s16 slot_num);
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static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si,
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int slot_num)
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{
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BUG_ON(slot_num == OCFS2_INVALID_SLOT);
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assert_spin_locked(&si->si_lock);
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return si->si_global_node_nums[slot_num] == OCFS2_INVALID_SLOT;
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}
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#endif
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