From 8cb471e8f82506937fe5e2e9fb0bf90f6b1f1170 Mon Sep 17 00:00:00 2001 From: Joel Becker Date: Tue, 10 Feb 2009 20:00:41 -0800 Subject: ocfs2: Take the inode out of the metadata read/write paths. We are really passing the inode into the ocfs2_read/write_blocks() functions to get at the metadata cache. This commit passes the cache directly into the metadata block functions, divorcing them from the inode. Signed-off-by: Joel Becker --- fs/ocfs2/uptodate.c | 83 ++++++++++++++++++++++++----------------------------- 1 file changed, 38 insertions(+), 45 deletions(-) (limited to 'fs/ocfs2/uptodate.c') diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c index 226d0429fd7f..1c829e451019 100644 --- a/fs/ocfs2/uptodate.c +++ b/fs/ocfs2/uptodate.c @@ -75,13 +75,20 @@ struct ocfs2_meta_cache_item { static struct kmem_cache *ocfs2_uptodate_cachep = NULL; -static u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci) +u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci) { BUG_ON(!ci || !ci->ci_ops); 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); @@ -96,14 +103,14 @@ static void ocfs2_metadata_cache_unlock(struct ocfs2_caching_info *ci) ci->ci_ops->co_cache_unlock(ci); } -static void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *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); } -static void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci) +void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci) { BUG_ON(!ci || !ci->ci_ops); @@ -149,11 +156,9 @@ 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; BUG_ON(!ci || !ci->ci_ops); @@ -223,12 +228,11 @@ ocfs2_search_cache_tree(struct ocfs2_caching_info *ci, 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; - struct ocfs2_caching_info *ci = &oi->ip_metadata_cache; ocfs2_metadata_cache_lock(ci); @@ -238,11 +242,9 @@ static int ocfs2_buffer_cached(struct ocfs2_inode_info *oi, !!(ci->ci_flags & OCFS2_CACHE_FL_INLINE)); if (ci->ci_flags & OCFS2_CACHE_FL_INLINE) - index = ocfs2_search_cache_array(&oi->ip_metadata_cache, - bh->b_blocknr); + 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); ocfs2_metadata_cache_unlock(ci); @@ -256,7 +258,7 @@ static int ocfs2_buffer_cached(struct ocfs2_inode_info *oi, * * This can be called under lock_buffer() */ -int ocfs2_buffer_uptodate(struct inode *inode, +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 @@ -272,17 +274,17 @@ int ocfs2_buffer_uptodate(struct inode *inode, /* 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 inode *inode, +int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci, struct buffer_head *bh) { - return buffer_locked(bh) && ocfs2_buffer_cached(OCFS2_I(inode), bh); + return buffer_locked(bh) && ocfs2_buffer_cached(ci, bh); } /* Requires ip_lock */ @@ -335,8 +337,7 @@ static void __ocfs2_insert_cache_tree(struct ocfs2_caching_info *ci, } /* co_cache_lock() must be held */ -static inline int ocfs2_insert_can_use_array(struct ocfs2_inode_info *oi, - struct ocfs2_caching_info *ci) +static inline int ocfs2_insert_can_use_array(struct ocfs2_caching_info *ci) { return (ci->ci_flags & OCFS2_CACHE_FL_INLINE) && (ci->ci_num_cached < OCFS2_CACHE_INFO_MAX_ARRAY); @@ -347,11 +348,10 @@ static inline int ocfs2_insert_can_use_array(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_inode_info *oi, +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_CACHE_INFO_MAX_ARRAY, "Owner %llu, num cached = %u, should be %u\n", @@ -383,12 +383,11 @@ static void ocfs2_expand_cache(struct ocfs2_inode_info *oi, /* 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_CACHE_INFO_MAX_ARRAY] = { NULL, }; @@ -420,7 +419,7 @@ static void __ocfs2_set_buffer_uptodate(struct ocfs2_inode_info *oi, } ocfs2_metadata_cache_lock(ci); - if (ocfs2_insert_can_use_array(oi, 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 */ @@ -430,7 +429,7 @@ static void __ocfs2_set_buffer_uptodate(struct ocfs2_inode_info *oi, } if (expand_tree) - ocfs2_expand_cache(oi, tree); + ocfs2_expand_cache(ci, tree); __ocfs2_insert_cache_tree(ci, new); ocfs2_metadata_cache_unlock(ci); @@ -468,16 +467,14 @@ out_free: * Readahead buffers can be passed in here before the I/O request is * completed. */ -void ocfs2_set_buffer_uptodate(struct inode *inode, +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, "Owner %llu, inserting block %llu\n", @@ -487,7 +484,7 @@ void ocfs2_set_buffer_uptodate(struct inode *inode, /* No need to recheck under spinlock - insertion is guarded by * co_io_lock() */ ocfs2_metadata_cache_lock(ci); - if (ocfs2_insert_can_use_array(oi, 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); @@ -502,25 +499,22 @@ void ocfs2_set_buffer_uptodate(struct inode *inode, } 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 co_io_lock() anyway. */ -void ocfs2_set_new_buffer_uptodate(struct inode *inode, +void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci, struct buffer_head *bh) { - struct ocfs2_inode_info *oi = OCFS2_I(inode); - struct ocfs2_caching_info *ci = &oi->ip_metadata_cache; - /* 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); ocfs2_metadata_cache_io_lock(ci); - ocfs2_set_buffer_uptodate(inode, bh); + ocfs2_set_buffer_uptodate(ci, bh); ocfs2_metadata_cache_io_unlock(ci); } @@ -559,13 +553,11 @@ static void ocfs2_remove_metadata_tree(struct ocfs2_caching_info *ci, ci->ci_num_cached--; } -static void ocfs2_remove_block_from_cache(struct inode *inode, +static void ocfs2_remove_block_from_cache(struct ocfs2_caching_info *ci, sector_t block) { int index; struct ocfs2_meta_cache_item *item = NULL; - struct ocfs2_inode_info *oi = OCFS2_I(inode); - struct ocfs2_caching_info *ci = &oi->ip_metadata_cache; ocfs2_metadata_cache_lock(ci); mlog(0, "Owner %llu, remove %llu, items = %u, array = %u\n", @@ -593,23 +585,24 @@ static void ocfs2_remove_block_from_cache(struct inode *inode, * 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, +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(inode, block); + ocfs2_remove_block_from_cache(ci, block); } /* Called when we remove xattr clusters from an inode. */ -void ocfs2_remove_xattr_clusters_from_cache(struct inode *inode, +void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci, sector_t block, u32 c_len) { - unsigned int i, b_len = ocfs2_clusters_to_blocks(inode->i_sb, 1) * 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(inode, block); + ocfs2_remove_block_from_cache(ci, block); } int __init init_ocfs2_uptodate_cache(void) -- cgit