#include <linux/highmem.h>
#include <linux/buffer_head.h>
#include <linux/rbtree.h>
-#include <linux/jbd.h>
#define MLOG_MASK_PREFIX ML_UPTODATE
sector_t c_block;
};
-static kmem_cache_t *ocfs2_uptodate_cachep = NULL;
+static struct kmem_cache *ocfs2_uptodate_cachep = NULL;
-void ocfs2_metadata_cache_init(struct inode *inode)
+u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci)
{
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
- struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
+ BUG_ON(!ci || !ci->ci_ops);
- oi->ip_flags |= OCFS2_INODE_CACHE_INLINE;
+ return ci->ci_ops->co_owner(ci);
+}
+
+struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci)
+{
+ BUG_ON(!ci || !ci->ci_ops);
+
+ return ci->ci_ops->co_get_super(ci);
+}
+
+static void ocfs2_metadata_cache_lock(struct ocfs2_caching_info *ci)
+{
+ BUG_ON(!ci || !ci->ci_ops);
+
+ ci->ci_ops->co_cache_lock(ci);
+}
+
+static void ocfs2_metadata_cache_unlock(struct ocfs2_caching_info *ci)
+{
+ BUG_ON(!ci || !ci->ci_ops);
+
+ ci->ci_ops->co_cache_unlock(ci);
+}
+
+void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci)
+{
+ BUG_ON(!ci || !ci->ci_ops);
+
+ ci->ci_ops->co_io_lock(ci);
+}
+
+void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci)
+{
+ BUG_ON(!ci || !ci->ci_ops);
+
+ ci->ci_ops->co_io_unlock(ci);
+}
+
+
+static void ocfs2_metadata_cache_reset(struct ocfs2_caching_info *ci,
+ int clear)
+{
+ ci->ci_flags |= OCFS2_CACHE_FL_INLINE;
ci->ci_num_cached = 0;
+
+ if (clear) {
+ ci->ci_created_trans = 0;
+ ci->ci_last_trans = 0;
+ }
}
+void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
+ const struct ocfs2_caching_operations *ops)
+{
+ BUG_ON(!ops);
+
+ ci->ci_ops = ops;
+ ocfs2_metadata_cache_reset(ci, 1);
+}
+
+void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci)
+{
+ ocfs2_metadata_cache_purge(ci);
+ ocfs2_metadata_cache_reset(ci, 1);
+}
+
+
/* No lock taken here as 'root' is not expected to be visible to other
* processes. */
static unsigned int ocfs2_purge_copied_metadata_tree(struct rb_root *root)
* This function is a few more lines longer than necessary due to some
* accounting done here, but I think it's worth tracking down those
* bugs sooner -- Mark */
-void ocfs2_metadata_cache_purge(struct inode *inode)
+void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci)
{
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
unsigned int tree, to_purge, purged;
- struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
struct rb_root root = RB_ROOT;
- spin_lock(&oi->ip_lock);
- tree = !(oi->ip_flags & OCFS2_INODE_CACHE_INLINE);
+ BUG_ON(!ci || !ci->ci_ops);
+
+ ocfs2_metadata_cache_lock(ci);
+ tree = !(ci->ci_flags & OCFS2_CACHE_FL_INLINE);
to_purge = ci->ci_num_cached;
- mlog(0, "Purge %u %s items from Inode %"MLFu64"\n", to_purge,
- tree ? "array" : "tree", oi->ip_blkno);
+ mlog(0, "Purge %u %s items from Owner %llu\n", to_purge,
+ tree ? "array" : "tree",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci));
/* If we're a tree, save off the root so that we can safely
* initialize the cache. We do the work to free tree members
if (tree)
root = ci->ci_cache.ci_tree;
- ocfs2_metadata_cache_init(inode);
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_reset(ci, 0);
+ ocfs2_metadata_cache_unlock(ci);
purged = ocfs2_purge_copied_metadata_tree(&root);
/* If possible, track the number wiped so that we can more
* easily detect counting errors. Unfortunately, this is only
* meaningful for trees. */
if (tree && purged != to_purge)
- mlog(ML_ERROR, "Inode %"MLFu64", count = %u, purged = %u\n",
- oi->ip_blkno, to_purge, purged);
+ mlog(ML_ERROR, "Owner %llu, count = %u, purged = %u\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ to_purge, purged);
}
/* Returns the index in the cache array, -1 if not found.
return NULL;
}
-static int ocfs2_buffer_cached(struct ocfs2_inode_info *oi,
+static int ocfs2_buffer_cached(struct ocfs2_caching_info *ci,
struct buffer_head *bh)
{
int index = -1;
struct ocfs2_meta_cache_item *item = NULL;
- spin_lock(&oi->ip_lock);
+ ocfs2_metadata_cache_lock(ci);
- mlog(0, "Inode %"MLFu64", query block %llu (inline = %u)\n",
- oi->ip_blkno, (unsigned long long) bh->b_blocknr,
- !!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE));
+ mlog(0, "Owner %llu, query block %llu (inline = %u)\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ (unsigned long long) bh->b_blocknr,
+ !!(ci->ci_flags & OCFS2_CACHE_FL_INLINE));
- if (oi->ip_flags & OCFS2_INODE_CACHE_INLINE)
- index = ocfs2_search_cache_array(&oi->ip_metadata_cache,
- bh->b_blocknr);
+ if (ci->ci_flags & OCFS2_CACHE_FL_INLINE)
+ index = ocfs2_search_cache_array(ci, bh->b_blocknr);
else
- item = ocfs2_search_cache_tree(&oi->ip_metadata_cache,
- bh->b_blocknr);
+ item = ocfs2_search_cache_tree(ci, bh->b_blocknr);
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_unlock(ci);
mlog(0, "index = %d, item = %p\n", index, item);
}
/* Warning: even if it returns true, this does *not* guarantee that
- * the block is stored in our inode metadata cache. */
-int ocfs2_buffer_uptodate(struct inode *inode,
+ * the block is stored in our inode metadata cache.
+ *
+ * This can be called under lock_buffer()
+ */
+int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
struct buffer_head *bh)
{
/* Doesn't matter if the bh is in our cache or not -- if it's
/* Ok, locally the buffer is marked as up to date, now search
* our cache to see if we can trust that. */
- return ocfs2_buffer_cached(OCFS2_I(inode), bh);
+ return ocfs2_buffer_cached(ci, bh);
+}
+
+/*
+ * Determine whether a buffer is currently out on a read-ahead request.
+ * ci_io_sem should be held to serialize submitters with the logic here.
+ */
+int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh)
+{
+ return buffer_locked(bh) && ocfs2_buffer_cached(ci, bh);
}
/* Requires ip_lock */
static void ocfs2_append_cache_array(struct ocfs2_caching_info *ci,
sector_t block)
{
- BUG_ON(ci->ci_num_cached >= OCFS2_INODE_MAX_CACHE_ARRAY);
+ BUG_ON(ci->ci_num_cached >= OCFS2_CACHE_INFO_MAX_ARRAY);
mlog(0, "block %llu takes position %u\n", (unsigned long long) block,
ci->ci_num_cached);
ci->ci_num_cached++;
}
-static inline int ocfs2_insert_can_use_array(struct ocfs2_inode_info *oi,
- struct ocfs2_caching_info *ci)
+/* co_cache_lock() must be held */
+static inline int ocfs2_insert_can_use_array(struct ocfs2_caching_info *ci)
{
- assert_spin_locked(&oi->ip_lock);
-
- return (oi->ip_flags & OCFS2_INODE_CACHE_INLINE) &&
- (ci->ci_num_cached < OCFS2_INODE_MAX_CACHE_ARRAY);
+ return (ci->ci_flags & OCFS2_CACHE_FL_INLINE) &&
+ (ci->ci_num_cached < OCFS2_CACHE_INFO_MAX_ARRAY);
}
-/* tree should be exactly OCFS2_INODE_MAX_CACHE_ARRAY wide. NULL the
+/* tree should be exactly OCFS2_CACHE_INFO_MAX_ARRAY wide. NULL the
* pointers in tree after we use them - this allows caller to detect
- * when to free in case of error. */
-static void ocfs2_expand_cache(struct ocfs2_inode_info *oi,
+ * when to free in case of error.
+ *
+ * The co_cache_lock() must be held. */
+static void ocfs2_expand_cache(struct ocfs2_caching_info *ci,
struct ocfs2_meta_cache_item **tree)
{
int i;
- struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
- mlog_bug_on_msg(ci->ci_num_cached != OCFS2_INODE_MAX_CACHE_ARRAY,
- "Inode %"MLFu64", num cached = %u, should be %u\n",
- oi->ip_blkno, ci->ci_num_cached,
- OCFS2_INODE_MAX_CACHE_ARRAY);
- mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
- "Inode %"MLFu64" not marked as inline anymore!\n",
- oi->ip_blkno);
- assert_spin_locked(&oi->ip_lock);
+ mlog_bug_on_msg(ci->ci_num_cached != OCFS2_CACHE_INFO_MAX_ARRAY,
+ "Owner %llu, num cached = %u, should be %u\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ ci->ci_num_cached, OCFS2_CACHE_INFO_MAX_ARRAY);
+ mlog_bug_on_msg(!(ci->ci_flags & OCFS2_CACHE_FL_INLINE),
+ "Owner %llu not marked as inline anymore!\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci));
/* Be careful to initialize the tree members *first* because
* once the ci_tree is used, the array is junk... */
- for(i = 0; i < OCFS2_INODE_MAX_CACHE_ARRAY; i++)
+ for (i = 0; i < OCFS2_CACHE_INFO_MAX_ARRAY; i++)
tree[i]->c_block = ci->ci_cache.ci_array[i];
- oi->ip_flags &= ~OCFS2_INODE_CACHE_INLINE;
+ ci->ci_flags &= ~OCFS2_CACHE_FL_INLINE;
ci->ci_cache.ci_tree = RB_ROOT;
/* this will be set again by __ocfs2_insert_cache_tree */
ci->ci_num_cached = 0;
- for(i = 0; i < OCFS2_INODE_MAX_CACHE_ARRAY; i++) {
+ for (i = 0; i < OCFS2_CACHE_INFO_MAX_ARRAY; i++) {
__ocfs2_insert_cache_tree(ci, tree[i]);
tree[i] = NULL;
}
- mlog(0, "Expanded %"MLFu64" to a tree cache: flags 0x%x, num = %u\n",
- oi->ip_blkno, oi->ip_flags, ci->ci_num_cached);
+ mlog(0, "Expanded %llu to a tree cache: flags 0x%x, num = %u\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ ci->ci_flags, ci->ci_num_cached);
}
/* Slow path function - memory allocation is necessary. See the
* comment above ocfs2_set_buffer_uptodate for more information. */
-static void __ocfs2_set_buffer_uptodate(struct ocfs2_inode_info *oi,
+static void __ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
sector_t block,
int expand_tree)
{
int i;
- struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
struct ocfs2_meta_cache_item *new = NULL;
- struct ocfs2_meta_cache_item *tree[OCFS2_INODE_MAX_CACHE_ARRAY] =
+ struct ocfs2_meta_cache_item *tree[OCFS2_CACHE_INFO_MAX_ARRAY] =
{ NULL, };
- mlog(0, "Inode %"MLFu64", block %llu, expand = %d\n",
- oi->ip_blkno, (unsigned long long) block, expand_tree);
+ mlog(0, "Owner %llu, block %llu, expand = %d\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ (unsigned long long)block, expand_tree);
- new = kmem_cache_alloc(ocfs2_uptodate_cachep, GFP_KERNEL);
+ new = kmem_cache_alloc(ocfs2_uptodate_cachep, GFP_NOFS);
if (!new) {
mlog_errno(-ENOMEM);
return;
if (expand_tree) {
/* Do *not* allocate an array here - the removal code
* has no way of tracking that. */
- for(i = 0; i < OCFS2_INODE_MAX_CACHE_ARRAY; i++) {
+ for (i = 0; i < OCFS2_CACHE_INFO_MAX_ARRAY; i++) {
tree[i] = kmem_cache_alloc(ocfs2_uptodate_cachep,
- GFP_KERNEL);
+ GFP_NOFS);
if (!tree[i]) {
mlog_errno(-ENOMEM);
goto out_free;
}
}
- spin_lock(&oi->ip_lock);
- if (ocfs2_insert_can_use_array(oi, ci)) {
+ ocfs2_metadata_cache_lock(ci);
+ if (ocfs2_insert_can_use_array(ci)) {
mlog(0, "Someone cleared the tree underneath us\n");
/* Ok, items were removed from the cache in between
* locks. Detect this and revert back to the fast path */
ocfs2_append_cache_array(ci, block);
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_unlock(ci);
goto out_free;
}
if (expand_tree)
- ocfs2_expand_cache(oi, tree);
+ ocfs2_expand_cache(ci, tree);
__ocfs2_insert_cache_tree(ci, new);
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_unlock(ci);
new = NULL;
out_free:
/* If these were used, then ocfs2_expand_cache re-set them to
* NULL for us. */
if (tree[0]) {
- for(i = 0; i < OCFS2_INODE_MAX_CACHE_ARRAY; i++)
+ for (i = 0; i < OCFS2_CACHE_INFO_MAX_ARRAY; i++)
if (tree[i])
kmem_cache_free(ocfs2_uptodate_cachep,
tree[i]);
}
}
-/* Item insertion is guarded by ip_io_mutex, so the insertion path takes
+/* Item insertion is guarded by co_io_lock(), so the insertion path takes
* advantage of this by not rechecking for a duplicate insert during
* the slow case. Additionally, if the cache needs to be bumped up to
* a tree, the code will not recheck after acquiring the lock --
*
* Note that this function may actually fail to insert the block if
* memory cannot be allocated. This is not fatal however (but may
- * result in a performance penalty) */
-void ocfs2_set_buffer_uptodate(struct inode *inode,
+ * result in a performance penalty)
+ *
+ * Readahead buffers can be passed in here before the I/O request is
+ * completed.
+ */
+void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
struct buffer_head *bh)
{
int expand;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
- struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
/* The block may very well exist in our cache already, so avoid
* doing any more work in that case. */
- if (ocfs2_buffer_cached(oi, bh))
+ if (ocfs2_buffer_cached(ci, bh))
return;
- mlog(0, "Inode %"MLFu64", inserting block %llu\n", oi->ip_blkno,
- (unsigned long long) bh->b_blocknr);
+ mlog(0, "Owner %llu, inserting block %llu\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ (unsigned long long)bh->b_blocknr);
/* No need to recheck under spinlock - insertion is guarded by
- * ip_io_mutex */
- spin_lock(&oi->ip_lock);
- if (ocfs2_insert_can_use_array(oi, ci)) {
+ * co_io_lock() */
+ ocfs2_metadata_cache_lock(ci);
+ if (ocfs2_insert_can_use_array(ci)) {
/* Fast case - it's an array and there's a free
* spot. */
ocfs2_append_cache_array(ci, bh->b_blocknr);
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_unlock(ci);
return;
}
expand = 0;
- if (oi->ip_flags & OCFS2_INODE_CACHE_INLINE) {
+ if (ci->ci_flags & OCFS2_CACHE_FL_INLINE) {
/* We need to bump things up to a tree. */
expand = 1;
}
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_unlock(ci);
- __ocfs2_set_buffer_uptodate(oi, bh->b_blocknr, expand);
+ __ocfs2_set_buffer_uptodate(ci, bh->b_blocknr, expand);
}
/* Called against a newly allocated buffer. Most likely nobody should
* be able to read this sort of metadata while it's still being
- * allocated, but this is careful to take ip_io_mutex anyway. */
-void ocfs2_set_new_buffer_uptodate(struct inode *inode,
+ * allocated, but this is careful to take co_io_lock() anyway. */
+void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
struct buffer_head *bh)
{
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
-
/* This should definitely *not* exist in our cache */
- BUG_ON(ocfs2_buffer_cached(oi, bh));
+ BUG_ON(ocfs2_buffer_cached(ci, bh));
set_buffer_uptodate(bh);
- mutex_lock(&oi->ip_io_mutex);
- ocfs2_set_buffer_uptodate(inode, bh);
- mutex_unlock(&oi->ip_io_mutex);
+ ocfs2_metadata_cache_io_lock(ci);
+ ocfs2_set_buffer_uptodate(ci, bh);
+ ocfs2_metadata_cache_io_unlock(ci);
}
/* Requires ip_lock. */
sector_t *array = ci->ci_cache.ci_array;
int bytes;
- BUG_ON(index < 0 || index >= OCFS2_INODE_MAX_CACHE_ARRAY);
+ BUG_ON(index < 0 || index >= OCFS2_CACHE_INFO_MAX_ARRAY);
BUG_ON(index >= ci->ci_num_cached);
BUG_ON(!ci->ci_num_cached);
ci->ci_num_cached--;
}
-/* Called when we remove a chunk of metadata from an inode. We don't
- * bother reverting things to an inlined array in the case of a remove
- * which moves us back under the limit. */
-void ocfs2_remove_from_cache(struct inode *inode,
- struct buffer_head *bh)
+static void ocfs2_remove_block_from_cache(struct ocfs2_caching_info *ci,
+ sector_t block)
{
int index;
- sector_t block = bh->b_blocknr;
struct ocfs2_meta_cache_item *item = NULL;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
- struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
- spin_lock(&oi->ip_lock);
- mlog(0, "Inode %"MLFu64", remove %llu, items = %u, array = %u\n",
- oi->ip_blkno, (unsigned long long) block, ci->ci_num_cached,
- oi->ip_flags & OCFS2_INODE_CACHE_INLINE);
+ ocfs2_metadata_cache_lock(ci);
+ mlog(0, "Owner %llu, remove %llu, items = %u, array = %u\n",
+ (unsigned long long)ocfs2_metadata_cache_owner(ci),
+ (unsigned long long) block, ci->ci_num_cached,
+ ci->ci_flags & OCFS2_CACHE_FL_INLINE);
- if (oi->ip_flags & OCFS2_INODE_CACHE_INLINE) {
+ if (ci->ci_flags & OCFS2_CACHE_FL_INLINE) {
index = ocfs2_search_cache_array(ci, block);
if (index != -1)
ocfs2_remove_metadata_array(ci, index);
if (item)
ocfs2_remove_metadata_tree(ci, item);
}
- spin_unlock(&oi->ip_lock);
+ ocfs2_metadata_cache_unlock(ci);
if (item)
kmem_cache_free(ocfs2_uptodate_cachep, item);
}
+/*
+ * Called when we remove a chunk of metadata from an inode. We don't
+ * bother reverting things to an inlined array in the case of a remove
+ * which moves us back under the limit.
+ */
+void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh)
+{
+ sector_t block = bh->b_blocknr;
+
+ ocfs2_remove_block_from_cache(ci, block);
+}
+
+/* Called when we remove xattr clusters from an inode. */
+void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
+ sector_t block,
+ u32 c_len)
+{
+ struct super_block *sb = ocfs2_metadata_cache_get_super(ci);
+ unsigned int i, b_len = ocfs2_clusters_to_blocks(sb, 1) * c_len;
+
+ for (i = 0; i < b_len; i++, block++)
+ ocfs2_remove_block_from_cache(ci, block);
+}
+
int __init init_ocfs2_uptodate_cache(void)
{
ocfs2_uptodate_cachep = kmem_cache_create("ocfs2_uptodate",
sizeof(struct ocfs2_meta_cache_item),
- 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+ 0, SLAB_HWCACHE_ALIGN, NULL);
if (!ocfs2_uptodate_cachep)
return -ENOMEM;
mlog(0, "%u inlined cache items per inode.\n",
- OCFS2_INODE_MAX_CACHE_ARRAY);
+ OCFS2_CACHE_INFO_MAX_ARRAY);
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff