diff options
| -rw-r--r-- | fs/Makefile | 2 | ||||
| -rw-r--r-- | fs/ext2/ext2.h | 4 | ||||
| -rw-r--r-- | fs/ext2/xattr.c | 48 | ||||
| -rw-r--r-- | fs/ext2/xattr.h | 8 | ||||
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/xattr.c | 54 | ||||
| -rw-r--r-- | fs/ext4/xattr.h | 4 | ||||
| -rw-r--r-- | fs/mbcache.c (renamed from fs/mbcache2.c) | 180 | ||||
| -rw-r--r-- | include/linux/mbcache.h | 53 | ||||
| -rw-r--r-- | include/linux/mbcache2.h | 53 |
10 files changed, 204 insertions, 204 deletions
diff --git a/fs/Makefile b/fs/Makefile index 59b8440..79f5225 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -41,7 +41,7 @@ obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o obj-$(CONFIG_BINFMT_ELF_FDPIC) += binfmt_elf_fdpic.o obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o -obj-$(CONFIG_FS_MBCACHE) += mbcache2.o +obj-$(CONFIG_FS_MBCACHE) += mbcache.o obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o obj-$(CONFIG_NFS_COMMON) += nfs_common/ obj-$(CONFIG_COREDUMP) += coredump.o diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index f98ce7e..170939f 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -61,7 +61,7 @@ struct ext2_block_alloc_info { #define rsv_start rsv_window._rsv_start #define rsv_end rsv_window._rsv_end -struct mb2_cache; +struct mb_cache; /* * second extended-fs super-block data in memory @@ -113,7 +113,7 @@ struct ext2_sb_info { * of the mount options. */ spinlock_t s_lock; - struct mb2_cache *s_mb_cache; + struct mb_cache *s_mb_cache; }; static inline spinlock_t * diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c index 7162b48..71d58c2 100644 --- a/fs/ext2/xattr.c +++ b/fs/ext2/xattr.c @@ -56,7 +56,7 @@ #include <linux/buffer_head.h> #include <linux/init.h> #include <linux/slab.h> -#include <linux/mbcache2.h> +#include <linux/mbcache.h> #include <linux/quotaops.h> #include <linux/rwsem.h> #include <linux/security.h> @@ -90,7 +90,7 @@ static int ext2_xattr_set2(struct inode *, struct buffer_head *, struct ext2_xattr_header *); -static int ext2_xattr_cache_insert(struct mb2_cache *, struct buffer_head *); +static int ext2_xattr_cache_insert(struct mb_cache *, struct buffer_head *); static struct buffer_head *ext2_xattr_cache_find(struct inode *, struct ext2_xattr_header *); static void ext2_xattr_rehash(struct ext2_xattr_header *, @@ -150,7 +150,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name, size_t name_len, size; char *end; int error; - struct mb2_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld", name_index, name, buffer, (long)buffer_size); @@ -246,7 +246,7 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size) char *end; size_t rest = buffer_size; int error; - struct mb2_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; ea_idebug(inode, "buffer=%p, buffer_size=%ld", buffer, (long)buffer_size); @@ -493,8 +493,8 @@ bad_block: ext2_error(sb, "ext2_xattr_set", * This must happen under buffer lock for * ext2_xattr_set2() to reliably detect modified block */ - mb2_cache_entry_delete_block(EXT2_SB(sb)->s_mb_cache, - hash, bh->b_blocknr); + mb_cache_entry_delete_block(EXT2_SB(sb)->s_mb_cache, + hash, bh->b_blocknr); /* keep the buffer locked while modifying it. */ } else { @@ -627,7 +627,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, struct super_block *sb = inode->i_sb; struct buffer_head *new_bh = NULL; int error; - struct mb2_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache; + struct mb_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache; if (header) { new_bh = ext2_xattr_cache_find(inode, header); @@ -721,8 +721,8 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, * This must happen under buffer lock for * ext2_xattr_set2() to reliably detect freed block */ - mb2_cache_entry_delete_block(ext2_mb_cache, - hash, old_bh->b_blocknr); + mb_cache_entry_delete_block(ext2_mb_cache, + hash, old_bh->b_blocknr); /* Free the old block. */ ea_bdebug(old_bh, "freeing"); ext2_free_blocks(inode, old_bh->b_blocknr, 1); @@ -786,8 +786,8 @@ ext2_xattr_delete_inode(struct inode *inode) * This must happen under buffer lock for ext2_xattr_set2() to * reliably detect freed block */ - mb2_cache_entry_delete_block(EXT2_SB(inode->i_sb)->s_mb_cache, - hash, bh->b_blocknr); + mb_cache_entry_delete_block(EXT2_SB(inode->i_sb)->s_mb_cache, + hash, bh->b_blocknr); ext2_free_blocks(inode, EXT2_I(inode)->i_file_acl, 1); get_bh(bh); bforget(bh); @@ -818,12 +818,12 @@ cleanup: * Returns 0, or a negative error number on failure. */ static int -ext2_xattr_cache_insert(struct mb2_cache *cache, struct buffer_head *bh) +ext2_xattr_cache_insert(struct mb_cache *cache, struct buffer_head *bh) { __u32 hash = le32_to_cpu(HDR(bh)->h_hash); int error; - error = mb2_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr); + error = mb_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr); if (error) { if (error == -EBUSY) { ea_bdebug(bh, "already in cache (%d cache entries)", @@ -887,14 +887,14 @@ static struct buffer_head * ext2_xattr_cache_find(struct inode *inode, struct ext2_xattr_header *header) { __u32 hash = le32_to_cpu(header->h_hash); - struct mb2_cache_entry *ce; - struct mb2_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache_entry *ce; + struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); again: - ce = mb2_cache_entry_find_first(ext2_mb_cache, hash); + ce = mb_cache_entry_find_first(ext2_mb_cache, hash); while (ce) { struct buffer_head *bh; @@ -915,7 +915,7 @@ again: * entry is still hashed is reliable. */ if (hlist_bl_unhashed(&ce->e_hash_list)) { - mb2_cache_entry_put(ext2_mb_cache, ce); + mb_cache_entry_put(ext2_mb_cache, ce); unlock_buffer(bh); brelse(bh); goto again; @@ -928,14 +928,14 @@ again: } else if (!ext2_xattr_cmp(header, HDR(bh))) { ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count))); - mb2_cache_entry_touch(ext2_mb_cache, ce); - mb2_cache_entry_put(ext2_mb_cache, ce); + mb_cache_entry_touch(ext2_mb_cache, ce); + mb_cache_entry_put(ext2_mb_cache, ce); return bh; } unlock_buffer(bh); brelse(bh); } - ce = mb2_cache_entry_find_next(ext2_mb_cache, ce); + ce = mb_cache_entry_find_next(ext2_mb_cache, ce); } return NULL; } @@ -1010,13 +1010,13 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *header, #define HASH_BUCKET_BITS 10 -struct mb2_cache *ext2_xattr_create_cache(void) +struct mb_cache *ext2_xattr_create_cache(void) { - return mb2_cache_create(HASH_BUCKET_BITS); + return mb_cache_create(HASH_BUCKET_BITS); } -void ext2_xattr_destroy_cache(struct mb2_cache *cache) +void ext2_xattr_destroy_cache(struct mb_cache *cache) { if (cache) - mb2_cache_destroy(cache); + mb_cache_destroy(cache); } diff --git a/fs/ext2/xattr.h b/fs/ext2/xattr.h index 6ea38aa..6f82ab1 100644 --- a/fs/ext2/xattr.h +++ b/fs/ext2/xattr.h @@ -53,7 +53,7 @@ struct ext2_xattr_entry { #define EXT2_XATTR_SIZE(size) \ (((size) + EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND) -struct mb2_cache; +struct mb_cache; # ifdef CONFIG_EXT2_FS_XATTR @@ -68,8 +68,8 @@ extern int ext2_xattr_set(struct inode *, int, const char *, const void *, size_ extern void ext2_xattr_delete_inode(struct inode *); -extern struct mb2_cache *ext2_xattr_create_cache(void); -extern void ext2_xattr_destroy_cache(struct mb2_cache *cache); +extern struct mb_cache *ext2_xattr_create_cache(void); +extern void ext2_xattr_destroy_cache(struct mb_cache *cache); extern const struct xattr_handler *ext2_xattr_handlers[]; @@ -94,7 +94,7 @@ ext2_xattr_delete_inode(struct inode *inode) { } -static inline void ext2_xattr_destroy_cache(struct mb2_cache *cache) +static inline void ext2_xattr_destroy_cache(struct mb_cache *cache) { } diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 9ac9e62..157b458 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1468,7 +1468,7 @@ struct ext4_sb_info { struct list_head s_es_list; /* List of inodes with reclaimable extents */ long s_es_nr_inode; struct ext4_es_stats s_es_stats; - struct mb2_cache *s_mb_cache; + struct mb_cache *s_mb_cache; spinlock_t s_es_lock ____cacheline_aligned_in_smp; /* Ratelimit ext4 messages. */ diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index fe9f8d6..c6af8a7 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -53,7 +53,7 @@ #include <linux/init.h> #include <linux/fs.h> #include <linux/slab.h> -#include <linux/mbcache2.h> +#include <linux/mbcache.h> #include <linux/quotaops.h> #include "ext4_jbd2.h" #include "ext4.h" @@ -78,10 +78,10 @@ # define ea_bdebug(bh, fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif -static void ext4_xattr_cache_insert(struct mb2_cache *, struct buffer_head *); +static void ext4_xattr_cache_insert(struct mb_cache *, struct buffer_head *); static struct buffer_head *ext4_xattr_cache_find(struct inode *, struct ext4_xattr_header *, - struct mb2_cache_entry **); + struct mb_cache_entry **); static void ext4_xattr_rehash(struct ext4_xattr_header *, struct ext4_xattr_entry *); static int ext4_xattr_list(struct dentry *dentry, char *buffer, @@ -276,7 +276,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name, struct ext4_xattr_entry *entry; size_t size; int error; - struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld", name_index, name, buffer, (long)buffer_size); @@ -428,7 +428,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size) struct inode *inode = d_inode(dentry); struct buffer_head *bh = NULL; int error; - struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); ea_idebug(inode, "buffer=%p, buffer_size=%ld", buffer, (long)buffer_size); @@ -561,8 +561,8 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode, * This must happen under buffer lock for * ext4_xattr_block_set() to reliably detect freed block */ - mb2_cache_entry_delete_block(EXT4_GET_MB_CACHE(inode), hash, - bh->b_blocknr); + mb_cache_entry_delete_block(EXT4_GET_MB_CACHE(inode), hash, + bh->b_blocknr); get_bh(bh); unlock_buffer(bh); ext4_free_blocks(handle, inode, bh, 0, 1, @@ -782,9 +782,9 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, struct super_block *sb = inode->i_sb; struct buffer_head *new_bh = NULL; struct ext4_xattr_search *s = &bs->s; - struct mb2_cache_entry *ce = NULL; + struct mb_cache_entry *ce = NULL; int error = 0; - struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); #define header(x) ((struct ext4_xattr_header *)(x)) @@ -805,8 +805,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, * ext4_xattr_block_set() to reliably detect modified * block */ - mb2_cache_entry_delete_block(ext4_mb_cache, hash, - bs->bh->b_blocknr); + mb_cache_entry_delete_block(ext4_mb_cache, hash, + bs->bh->b_blocknr); ea_bdebug(bs->bh, "modifying in-place"); error = ext4_xattr_set_entry(i, s); if (!error) { @@ -904,7 +904,7 @@ inserted: EXT4_C2B(EXT4_SB(sb), 1)); brelse(new_bh); - mb2_cache_entry_put(ext4_mb_cache, ce); + mb_cache_entry_put(ext4_mb_cache, ce); ce = NULL; new_bh = NULL; goto inserted; @@ -919,8 +919,8 @@ inserted: if (error) goto cleanup_dquot; } - mb2_cache_entry_touch(ext4_mb_cache, ce); - mb2_cache_entry_put(ext4_mb_cache, ce); + mb_cache_entry_touch(ext4_mb_cache, ce); + mb_cache_entry_put(ext4_mb_cache, ce); ce = NULL; } else if (bs->bh && s->base == bs->bh->b_data) { /* We were modifying this block in-place. */ @@ -985,7 +985,7 @@ getblk_failed: cleanup: if (ce) - mb2_cache_entry_put(ext4_mb_cache, ce); + mb_cache_entry_put(ext4_mb_cache, ce); brelse(new_bh); if (!(bs->bh && s->base == bs->bh->b_data)) kfree(s->base); @@ -1546,13 +1546,13 @@ cleanup: * Returns 0, or a negative error number on failure. */ static void -ext4_xattr_cache_insert(struct mb2_cache *ext4_mb_cache, struct buffer_head *bh) +ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh) { __u32 hash = le32_to_cpu(BHDR(bh)->h_hash); int error; - error = mb2_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash, - bh->b_blocknr); + error = mb_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash, + bh->b_blocknr); if (error) { if (error == -EBUSY) ea_bdebug(bh, "already in cache"); @@ -1610,16 +1610,16 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1, */ static struct buffer_head * ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header, - struct mb2_cache_entry **pce) + struct mb_cache_entry **pce) { __u32 hash = le32_to_cpu(header->h_hash); - struct mb2_cache_entry *ce; - struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); + struct mb_cache_entry *ce; + struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode); if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); - ce = mb2_cache_entry_find_first(ext4_mb_cache, hash); + ce = mb_cache_entry_find_first(ext4_mb_cache, hash); while (ce) { struct buffer_head *bh; @@ -1638,7 +1638,7 @@ ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header, return bh; } brelse(bh); - ce = mb2_cache_entry_find_next(ext4_mb_cache, ce); + ce = mb_cache_entry_find_next(ext4_mb_cache, ce); } return NULL; } @@ -1713,15 +1713,15 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *header, #define HASH_BUCKET_BITS 10 -struct mb2_cache * +struct mb_cache * ext4_xattr_create_cache(void) { - return mb2_cache_create(HASH_BUCKET_BITS); + return mb_cache_create(HASH_BUCKET_BITS); } -void ext4_xattr_destroy_cache(struct mb2_cache *cache) +void ext4_xattr_destroy_cache(struct mb_cache *cache) { if (cache) - mb2_cache_destroy(cache); + mb_cache_destroy(cache); } diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 10b0f73..69dd3e6 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -123,8 +123,8 @@ extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, struct ext4_xattr_info *i, struct ext4_xattr_ibody_find *is); -extern struct mb2_cache *ext4_xattr_create_cache(void); -extern void ext4_xattr_destroy_cache(struct mb2_cache *); +extern struct mb_cache *ext4_xattr_create_cache(void); +extern void ext4_xattr_destroy_cache(struct mb_cache *); #ifdef CONFIG_EXT4_FS_SECURITY extern int ext4_init_security(handle_t *handle, struct inode *inode, diff --git a/fs/mbcache2.c b/fs/mbcache.c index 49f7a6f..4241b63 100644 --- a/fs/mbcache2.c +++ b/fs/mbcache.c @@ -5,12 +5,12 @@ #include <linux/module.h> #include <linux/sched.h> #include <linux/workqueue.h> -#include <linux/mbcache2.h> +#include <linux/mbcache.h> /* * Mbcache is a simple key-value store. Keys need not be unique, however * key-value pairs are expected to be unique (we use this fact in - * mb2_cache_entry_delete_block()). + * mb_cache_entry_delete_block()). * * Ext2 and ext4 use this cache for deduplication of extended attribute blocks. * They use hash of a block contents as a key and block number as a value. @@ -23,7 +23,7 @@ * size hash table is used for fast key lookups. */ -struct mb2_cache { +struct mb_cache { /* Hash table of entries */ struct hlist_bl_head *c_hash; /* log2 of hash table size */ @@ -40,29 +40,29 @@ struct mb2_cache { struct work_struct c_shrink_work; }; -static struct kmem_cache *mb2_entry_cache; +static struct kmem_cache *mb_entry_cache; -static unsigned long mb2_cache_shrink(struct mb2_cache *cache, - unsigned int nr_to_scan); +static unsigned long mb_cache_shrink(struct mb_cache *cache, + unsigned int nr_to_scan); -static inline bool mb2_cache_entry_referenced(struct mb2_cache_entry *entry) +static inline bool mb_cache_entry_referenced(struct mb_cache_entry *entry) { return entry->_e_hash_list_head & 1; } -static inline void mb2_cache_entry_set_referenced(struct mb2_cache_entry *entry) +static inline void mb_cache_entry_set_referenced(struct mb_cache_entry *entry) { entry->_e_hash_list_head |= 1; } -static inline void mb2_cache_entry_clear_referenced( - struct mb2_cache_entry *entry) +static inline void mb_cache_entry_clear_referenced( + struct mb_cache_entry *entry) { entry->_e_hash_list_head &= ~1; } -static inline struct hlist_bl_head *mb2_cache_entry_head( - struct mb2_cache_entry *entry) +static inline struct hlist_bl_head *mb_cache_entry_head( + struct mb_cache_entry *entry) { return (struct hlist_bl_head *) (entry->_e_hash_list_head & ~1); @@ -75,7 +75,7 @@ static inline struct hlist_bl_head *mb2_cache_entry_head( #define SYNC_SHRINK_BATCH 64 /* - * mb2_cache_entry_create - create entry in cache + * mb_cache_entry_create - create entry in cache * @cache - cache where the entry should be created * @mask - gfp mask with which the entry should be allocated * @key - key of the entry @@ -85,10 +85,10 @@ static inline struct hlist_bl_head *mb2_cache_entry_head( * block @block. The function returns -EBUSY if entry with the same key * and for the same block already exists in cache. Otherwise 0 is returned. */ -int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key, - sector_t block) +int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, + sector_t block) { - struct mb2_cache_entry *entry, *dup; + struct mb_cache_entry *entry, *dup; struct hlist_bl_node *dup_node; struct hlist_bl_head *head; @@ -97,9 +97,9 @@ int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key, schedule_work(&cache->c_shrink_work); /* Do some sync reclaim if background reclaim cannot keep up */ if (cache->c_entry_count >= 2*cache->c_max_entries) - mb2_cache_shrink(cache, SYNC_SHRINK_BATCH); + mb_cache_shrink(cache, SYNC_SHRINK_BATCH); - entry = kmem_cache_alloc(mb2_entry_cache, mask); + entry = kmem_cache_alloc(mb_entry_cache, mask); if (!entry) return -ENOMEM; @@ -114,7 +114,7 @@ int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key, hlist_bl_for_each_entry(dup, dup_node, head, e_hash_list) { if (dup->e_key == key && dup->e_block == block) { hlist_bl_unlock(head); - kmem_cache_free(mb2_entry_cache, entry); + kmem_cache_free(mb_entry_cache, entry); return -EBUSY; } } @@ -130,24 +130,24 @@ int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key, return 0; } -EXPORT_SYMBOL(mb2_cache_entry_create); +EXPORT_SYMBOL(mb_cache_entry_create); -void __mb2_cache_entry_free(struct mb2_cache_entry *entry) +void __mb_cache_entry_free(struct mb_cache_entry *entry) { - kmem_cache_free(mb2_entry_cache, entry); + kmem_cache_free(mb_entry_cache, entry); } -EXPORT_SYMBOL(__mb2_cache_entry_free); +EXPORT_SYMBOL(__mb_cache_entry_free); -static struct mb2_cache_entry *__entry_find(struct mb2_cache *cache, - struct mb2_cache_entry *entry, - u32 key) +static struct mb_cache_entry *__entry_find(struct mb_cache *cache, + struct mb_cache_entry *entry, + u32 key) { - struct mb2_cache_entry *old_entry = entry; + struct mb_cache_entry *old_entry = entry; struct hlist_bl_node *node; struct hlist_bl_head *head; if (entry) - head = mb2_cache_entry_head(entry); + head = mb_cache_entry_head(entry); else head = &cache->c_hash[hash_32(key, cache->c_bucket_bits)]; hlist_bl_lock(head); @@ -156,7 +156,7 @@ static struct mb2_cache_entry *__entry_find(struct mb2_cache *cache, else node = hlist_bl_first(head); while (node) { - entry = hlist_bl_entry(node, struct mb2_cache_entry, + entry = hlist_bl_entry(node, struct mb_cache_entry, e_hash_list); if (entry->e_key == key) { atomic_inc(&entry->e_refcnt); @@ -168,28 +168,28 @@ static struct mb2_cache_entry *__entry_find(struct mb2_cache *cache, out: hlist_bl_unlock(head); if (old_entry) - mb2_cache_entry_put(cache, old_entry); + mb_cache_entry_put(cache, old_entry); return entry; } /* - * mb2_cache_entry_find_first - find the first entry in cache with given key + * mb_cache_entry_find_first - find the first entry in cache with given key * @cache: cache where we should search * @key: key to look for * * Search in @cache for entry with key @key. Grabs reference to the first * entry found and returns the entry. */ -struct mb2_cache_entry *mb2_cache_entry_find_first(struct mb2_cache *cache, - u32 key) +struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, + u32 key) { return __entry_find(cache, NULL, key); } -EXPORT_SYMBOL(mb2_cache_entry_find_first); +EXPORT_SYMBOL(mb_cache_entry_find_first); /* - * mb2_cache_entry_find_next - find next entry in cache with the same + * mb_cache_entry_find_next - find next entry in cache with the same * @cache: cache where we should search * @entry: entry to start search from * @@ -198,26 +198,26 @@ EXPORT_SYMBOL(mb2_cache_entry_find_first); * with the search), finds the first entry in the hash chain. The function * drops reference to @entry and returns with a reference to the found entry. */ -struct mb2_cache_entry *mb2_cache_entry_find_next(struct mb2_cache *cache, - struct mb2_cache_entry *entry) +struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache, + struct mb_cache_entry *entry) { return __entry_find(cache, entry, entry->e_key); } -EXPORT_SYMBOL(mb2_cache_entry_find_next); +EXPORT_SYMBOL(mb_cache_entry_find_next); -/* mb2_cache_entry_delete_block - remove information about block from cache +/* mb_cache_entry_delete_block - remove information about block from cache * @cache - cache we work with * @key - key of the entry to remove * @block - block containing data for @key * * Remove entry from cache @cache with key @key with data stored in @block. */ -void mb2_cache_entry_delete_block(struct mb2_cache *cache, u32 key, - sector_t block) +void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, + sector_t block) { struct hlist_bl_node *node; struct hlist_bl_head *head; - struct mb2_cache_entry *entry; + struct mb_cache_entry *entry; head = &cache->c_hash[hash_32(key, cache->c_bucket_bits)]; hlist_bl_lock(head); @@ -233,50 +233,50 @@ void mb2_cache_entry_delete_block(struct mb2_cache *cache, u32 key, atomic_dec(&entry->e_refcnt); } spin_unlock(&cache->c_list_lock); - mb2_cache_entry_put(cache, entry); + mb_cache_entry_put(cache, entry); return; } } hlist_bl_unlock(head); } -EXPORT_SYMBOL(mb2_cache_entry_delete_block); +EXPORT_SYMBOL(mb_cache_entry_delete_block); -/* mb2_cache_entry_touch - cache entry got used +/* mb_cache_entry_touch - cache entry got used * @cache - cache the entry belongs to * @entry - entry that got used * * Marks entry as used to give hit higher chances of surviving in cache. */ -void mb2_cache_entry_touch(struct mb2_cache *cache, - struct mb2_cache_entry *entry) +void mb_cache_entry_touch(struct mb_cache *cache, + struct mb_cache_entry *entry) { - mb2_cache_entry_set_referenced(entry); + mb_cache_entry_set_referenced(entry); } -EXPORT_SYMBOL(mb2_cache_entry_touch); +EXPORT_SYMBOL(mb_cache_entry_touch); -static unsigned long mb2_cache_count(struct shrinker *shrink, - struct shrink_control *sc) +static unsigned long mb_cache_count(struct shrinker *shrink, + struct shrink_control *sc) { - struct mb2_cache *cache = container_of(shrink, struct mb2_cache, - c_shrink); + struct mb_cache *cache = container_of(shrink, struct mb_cache, + c_shrink); return cache->c_entry_count; } /* Shrink number of entries in cache */ -static unsigned long mb2_cache_shrink(struct mb2_cache *cache, - unsigned int nr_to_scan) +static unsigned long mb_cache_shrink(struct mb_cache *cache, + unsigned int nr_to_scan) { - struct mb2_cache_entry *entry; + struct mb_cache_entry *entry; struct hlist_bl_head *head; unsigned int shrunk = 0; spin_lock(&cache->c_list_lock); while (nr_to_scan-- && !list_empty(&cache->c_list)) { entry = list_first_entry(&cache->c_list, - struct mb2_cache_entry, e_list); - if (mb2_cache_entry_referenced(entry)) { - mb2_cache_entry_clear_referenced(entry); + struct mb_cache_entry, e_list); + if (mb_cache_entry_referenced(entry)) { + mb_cache_entry_clear_referenced(entry); list_move_tail(&cache->c_list, &entry->e_list); continue; } @@ -287,14 +287,14 @@ static unsigned long mb2_cache_shrink(struct mb2_cache *cache, * from under us. */ spin_unlock(&cache->c_list_lock); - head = mb2_cache_entry_head(entry); + head = mb_cache_entry_head(entry); hlist_bl_lock(head); if (!hlist_bl_unhashed(&entry->e_hash_list)) { hlist_bl_del_init(&entry->e_hash_list); atomic_dec(&entry->e_refcnt); } hlist_bl_unlock(head); - if (mb2_cache_entry_put(cache, entry)) + if (mb_cache_entry_put(cache, entry)) shrunk++; cond_resched(); spin_lock(&cache->c_list_lock); @@ -304,41 +304,41 @@ static unsigned long mb2_cache_shrink(struct mb2_cache *cache, return shrunk; } -static unsigned long mb2_cache_scan(struct shrinker *shrink, - struct shrink_control *sc) +static unsigned long mb_cache_scan(struct shrinker *shrink, + struct shrink_control *sc) { int nr_to_scan = sc->nr_to_scan; - struct mb2_cache *cache = container_of(shrink, struct mb2_cache, + struct mb_cache *cache = container_of(shrink, struct mb_cache, c_shrink); - return mb2_cache_shrink(cache, nr_to_scan); + return mb_cache_shrink(cache, nr_to_scan); } /* We shrink 1/X of the cache when we have too many entries in it */ #define SHRINK_DIVISOR 16 -static void mb2_cache_shrink_worker(struct work_struct *work) +static void mb_cache_shrink_worker(struct work_struct *work) { - struct mb2_cache *cache = container_of(work, struct mb2_cache, - c_shrink_work); - mb2_cache_shrink(cache, cache->c_max_entries / SHRINK_DIVISOR); + struct mb_cache *cache = container_of(work, struct mb_cache, + c_shrink_work); + mb_cache_shrink(cache, cache->c_max_entries / SHRINK_DIVISOR); } /* - * mb2_cache_create - create cache + * mb_cache_create - create cache * @bucket_bits: log2 of the hash table size * * Create cache for keys with 2^bucket_bits hash entries. */ -struct mb2_cache *mb2_cache_create(int bucket_bits) +struct mb_cache *mb_cache_create(int bucket_bits) { - struct mb2_cache *cache; + struct mb_cache *cache; int bucket_count = 1 << bucket_bits; int i; if (!try_module_get(THIS_MODULE)) return NULL; - cache = kzalloc(sizeof(struct mb2_cache), GFP_KERNEL); + cache = kzalloc(sizeof(struct mb_cache), GFP_KERNEL); if (!cache) goto err_out; cache->c_bucket_bits = bucket_bits; @@ -354,12 +354,12 @@ struct mb2_cache *mb2_cache_create(int bucket_bits) for (i = 0; i < bucket_count; i++) INIT_HLIST_BL_HEAD(&cache->c_hash[i]); - cache->c_shrink.count_objects = mb2_cache_count; - cache->c_shrink.scan_objects = mb2_cache_scan; + cache->c_shrink.count_objects = mb_cache_count; + cache->c_shrink.scan_objects = mb_cache_scan; cache->c_shrink.seeks = DEFAULT_SEEKS; register_shrinker(&cache->c_shrink); - INIT_WORK(&cache->c_shrink_work, mb2_cache_shrink_worker); + INIT_WORK(&cache->c_shrink_work, mb_cache_shrink_worker); return cache; @@ -367,18 +367,18 @@ err_out: module_put(THIS_MODULE); return NULL; } -EXPORT_SYMBOL(mb2_cache_create); +EXPORT_SYMBOL(mb_cache_create); /* - * mb2_cache_destroy - destroy cache + * mb_cache_destroy - destroy cache * @cache: the cache to destroy * * Free all entries in cache and cache itself. Caller must make sure nobody * (except shrinker) can reach @cache when calling this. */ -void mb2_cache_destroy(struct mb2_cache *cache) +void mb_cache_destroy(struct mb_cache *cache) { - struct mb2_cache_entry *entry, *next; + struct mb_cache_entry *entry, *next; unregister_shrinker(&cache->c_shrink); @@ -394,30 +394,30 @@ void mb2_cache_destroy(struct mb2_cache *cache) WARN_ON(1); list_del(&entry->e_list); WARN_ON(atomic_read(&entry->e_refcnt) != 1); - mb2_cache_entry_put(cache, entry); + mb_cache_entry_put(cache, entry); } kfree(cache->c_hash); kfree(cache); module_put(THIS_MODULE); } -EXPORT_SYMBOL(mb2_cache_destroy); +EXPORT_SYMBOL(mb_cache_destroy); -static int __init mb2cache_init(void) +static int __init mbcache_init(void) { - mb2_entry_cache = kmem_cache_create("mbcache", - sizeof(struct mb2_cache_entry), 0, + mb_entry_cache = kmem_cache_create("mbcache", + sizeof(struct mb_cache_entry), 0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); - BUG_ON(!mb2_entry_cache); + BUG_ON(!mb_entry_cache); return 0; } -static void __exit mb2cache_exit(void) +static void __exit mbcache_exit(void) { - kmem_cache_destroy(mb2_entry_cache); + kmem_cache_destroy(mb_entry_cache); } -module_init(mb2cache_init) -module_exit(mb2cache_exit) +module_init(mbcache_init) +module_exit(mbcache_exit) MODULE_AUTHOR("Jan Kara <jack@suse.cz>"); MODULE_DESCRIPTION("Meta block cache (for extended attributes)"); diff --git a/include/linux/mbcache.h b/include/linux/mbcache.h new file mode 100644 index 0000000..a74a1f3 --- /dev/null +++ b/include/linux/mbcache.h @@ -0,0 +1,53 @@ +#ifndef _LINUX_MBCACHE_H +#define _LINUX_MBCACHE_H + +#include <linux/hash.h> +#include <linux/list_bl.h> +#include <linux/list.h> +#include <linux/atomic.h> +#include <linux/fs.h> + +struct mb_cache; + +struct mb_cache_entry { + /* List of entries in cache - protected by cache->c_list_lock */ + struct list_head e_list; + /* Hash table list - protected by bitlock in e_hash_list_head */ + struct hlist_bl_node e_hash_list; + atomic_t e_refcnt; + /* Key in hash - stable during lifetime of the entry */ + u32 e_key; + /* Block number of hashed block - stable during lifetime of the entry */ + sector_t e_block; + /* + * Head of hash list (for list bit lock) - stable. Combined with + * referenced bit of entry + */ + unsigned long _e_hash_list_head; +}; + +struct mb_cache *mb_cache_create(int bucket_bits); +void mb_cache_destroy(struct mb_cache *cache); + +int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, + sector_t block); +void __mb_cache_entry_free(struct mb_cache_entry *entry); +static inline int mb_cache_entry_put(struct mb_cache *cache, + struct mb_cache_entry *entry) +{ + if (!atomic_dec_and_test(&entry->e_refcnt)) + return 0; + __mb_cache_entry_free(entry); + return 1; +} + +void mb_cache_entry_delete_block(struct mb_cache *cache, u32 key, + sector_t block); +struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, + u32 key); +struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache, + struct mb_cache_entry *entry); +void mb_cache_entry_touch(struct mb_cache *cache, + struct mb_cache_entry *entry); + +#endif /* _LINUX_MBCACHE_H */ diff --git a/include/linux/mbcache2.h b/include/linux/mbcache2.h deleted file mode 100644 index c934843..0000000 --- a/include/linux/mbcache2.h +++ /dev/null @@ -1,53 +0,0 @@ -#ifndef _LINUX_MB2CACHE_H -#define _LINUX_MB2CACHE_H - -#include <linux/hash.h> -#include <linux/list_bl.h> -#include <linux/list.h> -#include <linux/atomic.h> -#include <linux/fs.h> - -struct mb2_cache; - -struct mb2_cache_entry { - /* List of entries in cache - protected by cache->c_list_lock */ - struct list_head e_list; - /* Hash table list - protected by bitlock in e_hash_list_head */ - struct hlist_bl_node e_hash_list; - atomic_t e_refcnt; - /* Key in hash - stable during lifetime of the entry */ - u32 e_key; - /* Block number of hashed block - stable during lifetime of the entry */ - sector_t e_block; - /* - * Head of hash list (for list bit lock) - stable. Combined with - * referenced bit of entry - */ - unsigned long _e_hash_list_head; -}; - -struct mb2_cache *mb2_cache_create(int bucket_bits); -void mb2_cache_destroy(struct mb2_cache *cache); - -int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key, - sector_t block); -void __mb2_cache_entry_free(struct mb2_cache_entry *entry); -static inline int mb2_cache_entry_put(struct mb2_cache *cache, - struct mb2_cache_entry *entry) -{ - if (!atomic_dec_and_test(&entry->e_refcnt)) - return 0; - __mb2_cache_entry_free(entry); - return 1; -} - -void mb2_cache_entry_delete_block(struct mb2_cache *cache, u32 key, - sector_t block); -struct mb2_cache_entry *mb2_cache_entry_find_first(struct mb2_cache *cache, - u32 key); -struct mb2_cache_entry *mb2_cache_entry_find_next(struct mb2_cache *cache, - struct mb2_cache_entry *entry); -void mb2_cache_entry_touch(struct mb2_cache *cache, - struct mb2_cache_entry *entry); - -#endif /* _LINUX_MB2CACHE_H */ |
