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Subject[PATCH 01/62] ocfs2: Move slot map access into slot_map.c
Date
journal.c and dlmglue.c would refresh the slot map by hand.  Instead, have
the update and clear functions do the work inside slot_map.c. The eventual
result is to make ocfs2_slot_info defined privately in slot_map.c

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
---
fs/ocfs2/dlmglue.c | 8 +-----
fs/ocfs2/journal.c | 3 +-
fs/ocfs2/slot_map.c | 62 +++++++++++++++++++++++++++++++++++++++-----------
fs/ocfs2/slot_map.h | 11 +++-----
fs/ocfs2/super.c | 3 +-
5 files changed, 55 insertions(+), 32 deletions(-)
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 1f1873b..1a80fa9 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2132,8 +2132,6 @@ int ocfs2_super_lock(struct ocfs2_super *osb,
int status = 0;
int level = ex ? LKM_EXMODE : LKM_PRMODE;
struct ocfs2_lock_res *lockres = &osb->osb_super_lockres;
- struct buffer_head *bh;
- struct ocfs2_slot_info *si = osb->slot_info;

mlog_entry_void();

@@ -2159,11 +2157,7 @@ int ocfs2_super_lock(struct ocfs2_super *osb,
goto bail;
}
if (status) {
- bh = si->si_bh;
- status = ocfs2_read_block(osb, bh->b_blocknr, &bh, 0,
- si->si_inode);
- if (status == 0)
- ocfs2_update_slot_info(si);
+ status = ocfs2_refresh_slot_info(osb);

ocfs2_complete_lock_res_refresh(lockres, status);

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index f31c7e8..c2e654e 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1123,8 +1123,7 @@ static int ocfs2_recover_node(struct ocfs2_super *osb,

/* Likewise, this would be a strange but ultimately not so
* harmful place to get an error... */
- ocfs2_clear_slot(si, slot_num);
- status = ocfs2_update_disk_slots(osb, si);
+ status = ocfs2_clear_slot(osb, slot_num);
if (status < 0)
mlog_errno(status);

diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c
index 3a50ce5..f5727b8 100644
--- a/fs/ocfs2/slot_map.c
+++ b/fs/ocfs2/slot_map.c
@@ -49,7 +49,7 @@ static void __ocfs2_fill_slot(struct ocfs2_slot_info *si,
s16 node_num);

/* post the slot information on disk into our slot_info struct. */
-void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
+static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
{
int i;
__le16 *disk_info;
@@ -65,10 +65,27 @@ void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
spin_unlock(&si->si_lock);
}

+int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
+{
+ int ret;
+ struct ocfs2_slot_info *si = osb->slot_info;
+ struct buffer_head *bh;
+
+ if (si == NULL)
+ return 0;
+
+ bh = si->si_bh;
+ ret = ocfs2_read_block(osb, bh->b_blocknr, &bh, 0, si->si_inode);
+ if (ret == 0)
+ ocfs2_update_slot_info(si);
+
+ return ret;
+}
+
/* post the our slot info stuff into it's destination bh and write it
* out. */
-int ocfs2_update_disk_slots(struct ocfs2_super *osb,
- struct ocfs2_slot_info *si)
+static int ocfs2_update_disk_slots(struct ocfs2_super *osb,
+ struct ocfs2_slot_info *si)
{
int status, i;
__le16 *disk_info = (__le16 *) si->si_bh->b_data;
@@ -135,6 +152,19 @@ s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
return ret;
}

+static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si)
+{
+ if (si == NULL)
+ return;
+
+ if (si->si_inode)
+ iput(si->si_inode);
+ if (si->si_bh)
+ brelse(si->si_bh);
+
+ kfree(si);
+}
+
static void __ocfs2_fill_slot(struct ocfs2_slot_info *si,
s16 slot_num,
s16 node_num)
@@ -147,12 +177,18 @@ static void __ocfs2_fill_slot(struct ocfs2_slot_info *si,
si->si_global_node_nums[slot_num] = node_num;
}

-void ocfs2_clear_slot(struct ocfs2_slot_info *si,
- s16 slot_num)
+int ocfs2_clear_slot(struct ocfs2_super *osb, s16 slot_num)
{
+ struct ocfs2_slot_info *si = osb->slot_info;
+
+ if (si == NULL)
+ return 0;
+
spin_lock(&si->si_lock);
__ocfs2_fill_slot(si, slot_num, OCFS2_INVALID_SLOT);
spin_unlock(&si->si_lock);
+
+ return ocfs2_update_disk_slots(osb, osb->slot_info);
}

int ocfs2_init_slot_info(struct ocfs2_super *osb)
@@ -202,18 +238,17 @@ int ocfs2_init_slot_info(struct ocfs2_super *osb)
osb->slot_info = si;
bail:
if (status < 0 && si)
- ocfs2_free_slot_info(si);
+ __ocfs2_free_slot_info(si);

return status;
}

-void ocfs2_free_slot_info(struct ocfs2_slot_info *si)
+void ocfs2_free_slot_info(struct ocfs2_super *osb)
{
- if (si->si_inode)
- iput(si->si_inode);
- if (si->si_bh)
- brelse(si->si_bh);
- kfree(si);
+ struct ocfs2_slot_info *si = osb->slot_info;
+
+ osb->slot_info = NULL;
+ __ocfs2_free_slot_info(si);
}

int ocfs2_find_slot(struct ocfs2_super *osb)
@@ -285,7 +320,6 @@ void ocfs2_put_slot(struct ocfs2_super *osb)
}

bail:
- osb->slot_info = NULL;
- ocfs2_free_slot_info(si);
+ ocfs2_free_slot_info(osb);
}

diff --git a/fs/ocfs2/slot_map.h b/fs/ocfs2/slot_map.h
index 1025872..b029ffd 100644
--- a/fs/ocfs2/slot_map.h
+++ b/fs/ocfs2/slot_map.h
@@ -30,7 +30,7 @@
struct ocfs2_slot_info {
spinlock_t si_lock;

- struct inode *si_inode;
+ struct inode *si_inode;
struct buffer_head *si_bh;
unsigned int si_num_slots;
unsigned int si_size;
@@ -38,19 +38,16 @@ struct ocfs2_slot_info {
};

int ocfs2_init_slot_info(struct ocfs2_super *osb);
-void ocfs2_free_slot_info(struct ocfs2_slot_info *si);
+void ocfs2_free_slot_info(struct ocfs2_super *osb);

int ocfs2_find_slot(struct ocfs2_super *osb);
void ocfs2_put_slot(struct ocfs2_super *osb);

-void ocfs2_update_slot_info(struct ocfs2_slot_info *si);
-int ocfs2_update_disk_slots(struct ocfs2_super *osb,
- struct ocfs2_slot_info *si);
+int ocfs2_refresh_slot_info(struct ocfs2_super *osb);

s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
s16 global);
-void ocfs2_clear_slot(struct ocfs2_slot_info *si,
- s16 slot_num);
+int ocfs2_clear_slot(struct ocfs2_super *osb, s16 slot_num);

static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si,
int slot_num)
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index bec75af..fad37af 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1724,8 +1724,7 @@ static void ocfs2_delete_osb(struct ocfs2_super *osb)

/* This function assumes that the caller has the main osb resource */

- if (osb->slot_info)
- ocfs2_free_slot_info(osb->slot_info);
+ ocfs2_free_slot_info(osb);

kfree(osb->osb_orphan_wipes);
/* FIXME
--
1.5.4.1


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