mbcache2: rename to mbcache
Since old mbcache code is gone, let's rename new code to mbcache since number 2 is now meaningless. This is just a mechanical replacement. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>hifive-unleashed-5.1
Jan Kara
Theodore Ts'o
parent
f0c8b46238
commit
7a2508e1b6
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@ -41,7 +41,7 @@ obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o
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obj-$(CONFIG_BINFMT_ELF_FDPIC) += binfmt_elf_fdpic.o
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obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o
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obj-$(CONFIG_FS_MBCACHE) += mbcache2.o
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obj-$(CONFIG_FS_MBCACHE) += mbcache.o
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obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o
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obj-$(CONFIG_NFS_COMMON) += nfs_common/
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obj-$(CONFIG_COREDUMP) += coredump.o
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@ -61,7 +61,7 @@ struct ext2_block_alloc_info {
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#define rsv_start rsv_window._rsv_start
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#define rsv_end rsv_window._rsv_end
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struct mb2_cache;
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struct mb_cache;
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/*
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* second extended-fs super-block data in memory
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@ -113,7 +113,7 @@ struct ext2_sb_info {
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* of the mount options.
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*/
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spinlock_t s_lock;
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struct mb2_cache *s_mb_cache;
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struct mb_cache *s_mb_cache;
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};
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static inline spinlock_t *
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@ -56,7 +56,7 @@
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#include <linux/buffer_head.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/mbcache2.h>
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#include <linux/mbcache.h>
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#include <linux/quotaops.h>
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#include <linux/rwsem.h>
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#include <linux/security.h>
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@ -90,7 +90,7 @@
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static int ext2_xattr_set2(struct inode *, struct buffer_head *,
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struct ext2_xattr_header *);
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static int ext2_xattr_cache_insert(struct mb2_cache *, struct buffer_head *);
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static int ext2_xattr_cache_insert(struct mb_cache *, struct buffer_head *);
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static struct buffer_head *ext2_xattr_cache_find(struct inode *,
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struct ext2_xattr_header *);
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static void ext2_xattr_rehash(struct ext2_xattr_header *,
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@ -150,7 +150,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name,
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size_t name_len, size;
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char *end;
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int error;
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struct mb2_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache;
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struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache;
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ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
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name_index, name, buffer, (long)buffer_size);
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@ -246,7 +246,7 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size)
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char *end;
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size_t rest = buffer_size;
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int error;
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struct mb2_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache;
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struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache;
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ea_idebug(inode, "buffer=%p, buffer_size=%ld",
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buffer, (long)buffer_size);
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@ -493,8 +493,8 @@ bad_block: ext2_error(sb, "ext2_xattr_set",
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* This must happen under buffer lock for
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* ext2_xattr_set2() to reliably detect modified block
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*/
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mb2_cache_entry_delete_block(EXT2_SB(sb)->s_mb_cache,
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hash, bh->b_blocknr);
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mb_cache_entry_delete_block(EXT2_SB(sb)->s_mb_cache,
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hash, bh->b_blocknr);
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/* keep the buffer locked while modifying it. */
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} else {
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@ -627,7 +627,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh,
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struct super_block *sb = inode->i_sb;
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struct buffer_head *new_bh = NULL;
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int error;
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struct mb2_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache;
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struct mb_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache;
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if (header) {
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new_bh = ext2_xattr_cache_find(inode, header);
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@ -721,8 +721,8 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh,
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* This must happen under buffer lock for
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* ext2_xattr_set2() to reliably detect freed block
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*/
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mb2_cache_entry_delete_block(ext2_mb_cache,
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hash, old_bh->b_blocknr);
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mb_cache_entry_delete_block(ext2_mb_cache,
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hash, old_bh->b_blocknr);
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/* Free the old block. */
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ea_bdebug(old_bh, "freeing");
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ext2_free_blocks(inode, old_bh->b_blocknr, 1);
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@ -786,8 +786,8 @@ ext2_xattr_delete_inode(struct inode *inode)
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* This must happen under buffer lock for ext2_xattr_set2() to
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* reliably detect freed block
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*/
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mb2_cache_entry_delete_block(EXT2_SB(inode->i_sb)->s_mb_cache,
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hash, bh->b_blocknr);
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mb_cache_entry_delete_block(EXT2_SB(inode->i_sb)->s_mb_cache,
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hash, bh->b_blocknr);
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ext2_free_blocks(inode, EXT2_I(inode)->i_file_acl, 1);
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get_bh(bh);
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bforget(bh);
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@ -818,12 +818,12 @@ cleanup:
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* Returns 0, or a negative error number on failure.
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*/
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static int
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ext2_xattr_cache_insert(struct mb2_cache *cache, struct buffer_head *bh)
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ext2_xattr_cache_insert(struct mb_cache *cache, struct buffer_head *bh)
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{
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__u32 hash = le32_to_cpu(HDR(bh)->h_hash);
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int error;
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error = mb2_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr);
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error = mb_cache_entry_create(cache, GFP_NOFS, hash, bh->b_blocknr);
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if (error) {
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if (error == -EBUSY) {
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ea_bdebug(bh, "already in cache (%d cache entries)",
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@ -887,14 +887,14 @@ static struct buffer_head *
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ext2_xattr_cache_find(struct inode *inode, struct ext2_xattr_header *header)
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{
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__u32 hash = le32_to_cpu(header->h_hash);
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struct mb2_cache_entry *ce;
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struct mb2_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache;
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struct mb_cache_entry *ce;
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struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache;
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if (!header->h_hash)
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return NULL; /* never share */
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ea_idebug(inode, "looking for cached blocks [%x]", (int)hash);
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again:
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ce = mb2_cache_entry_find_first(ext2_mb_cache, hash);
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ce = mb_cache_entry_find_first(ext2_mb_cache, hash);
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while (ce) {
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struct buffer_head *bh;
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@ -915,7 +915,7 @@ again:
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* entry is still hashed is reliable.
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*/
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if (hlist_bl_unhashed(&ce->e_hash_list)) {
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mb2_cache_entry_put(ext2_mb_cache, ce);
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mb_cache_entry_put(ext2_mb_cache, ce);
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unlock_buffer(bh);
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brelse(bh);
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goto again;
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@ -928,14 +928,14 @@ again:
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} else if (!ext2_xattr_cmp(header, HDR(bh))) {
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ea_bdebug(bh, "b_count=%d",
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atomic_read(&(bh->b_count)));
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mb2_cache_entry_touch(ext2_mb_cache, ce);
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mb2_cache_entry_put(ext2_mb_cache, ce);
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mb_cache_entry_touch(ext2_mb_cache, ce);
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mb_cache_entry_put(ext2_mb_cache, ce);
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return bh;
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}
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unlock_buffer(bh);
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brelse(bh);
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}
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ce = mb2_cache_entry_find_next(ext2_mb_cache, ce);
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ce = mb_cache_entry_find_next(ext2_mb_cache, ce);
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}
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return NULL;
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}
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@ -1010,13 +1010,13 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *header,
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#define HASH_BUCKET_BITS 10
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struct mb2_cache *ext2_xattr_create_cache(void)
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struct mb_cache *ext2_xattr_create_cache(void)
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{
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return mb2_cache_create(HASH_BUCKET_BITS);
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return mb_cache_create(HASH_BUCKET_BITS);
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}
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void ext2_xattr_destroy_cache(struct mb2_cache *cache)
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void ext2_xattr_destroy_cache(struct mb_cache *cache)
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{
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if (cache)
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mb2_cache_destroy(cache);
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mb_cache_destroy(cache);
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}
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@ -53,7 +53,7 @@ struct ext2_xattr_entry {
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#define EXT2_XATTR_SIZE(size) \
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(((size) + EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND)
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struct mb2_cache;
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struct mb_cache;
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# ifdef CONFIG_EXT2_FS_XATTR
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@ -68,8 +68,8 @@ extern int ext2_xattr_set(struct inode *, int, const char *, const void *, size_
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extern void ext2_xattr_delete_inode(struct inode *);
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extern struct mb2_cache *ext2_xattr_create_cache(void);
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extern void ext2_xattr_destroy_cache(struct mb2_cache *cache);
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extern struct mb_cache *ext2_xattr_create_cache(void);
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extern void ext2_xattr_destroy_cache(struct mb_cache *cache);
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extern const struct xattr_handler *ext2_xattr_handlers[];
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@ -94,7 +94,7 @@ ext2_xattr_delete_inode(struct inode *inode)
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{
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}
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static inline void ext2_xattr_destroy_cache(struct mb2_cache *cache)
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static inline void ext2_xattr_destroy_cache(struct mb_cache *cache)
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{
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}
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@ -1468,7 +1468,7 @@ struct ext4_sb_info {
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struct list_head s_es_list; /* List of inodes with reclaimable extents */
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long s_es_nr_inode;
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struct ext4_es_stats s_es_stats;
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struct mb2_cache *s_mb_cache;
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struct mb_cache *s_mb_cache;
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spinlock_t s_es_lock ____cacheline_aligned_in_smp;
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/* Ratelimit ext4 messages. */
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@ -53,7 +53,7 @@
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/mbcache2.h>
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#include <linux/mbcache.h>
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#include <linux/quotaops.h>
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#include "ext4_jbd2.h"
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#include "ext4.h"
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@ -78,10 +78,10 @@
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# define ea_bdebug(bh, fmt, ...) no_printk(fmt, ##__VA_ARGS__)
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#endif
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static void ext4_xattr_cache_insert(struct mb2_cache *, struct buffer_head *);
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static void ext4_xattr_cache_insert(struct mb_cache *, struct buffer_head *);
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static struct buffer_head *ext4_xattr_cache_find(struct inode *,
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struct ext4_xattr_header *,
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struct mb2_cache_entry **);
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struct mb_cache_entry **);
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static void ext4_xattr_rehash(struct ext4_xattr_header *,
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struct ext4_xattr_entry *);
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static int ext4_xattr_list(struct dentry *dentry, char *buffer,
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@ -276,7 +276,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
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struct ext4_xattr_entry *entry;
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size_t size;
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int error;
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struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
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name_index, name, buffer, (long)buffer_size);
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@ -428,7 +428,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
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struct inode *inode = d_inode(dentry);
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struct buffer_head *bh = NULL;
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int error;
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struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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ea_idebug(inode, "buffer=%p, buffer_size=%ld",
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buffer, (long)buffer_size);
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@ -561,8 +561,8 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
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* This must happen under buffer lock for
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* ext4_xattr_block_set() to reliably detect freed block
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*/
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mb2_cache_entry_delete_block(EXT4_GET_MB_CACHE(inode), hash,
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bh->b_blocknr);
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mb_cache_entry_delete_block(EXT4_GET_MB_CACHE(inode), hash,
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bh->b_blocknr);
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get_bh(bh);
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unlock_buffer(bh);
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ext4_free_blocks(handle, inode, bh, 0, 1,
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@ -782,9 +782,9 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
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struct super_block *sb = inode->i_sb;
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struct buffer_head *new_bh = NULL;
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struct ext4_xattr_search *s = &bs->s;
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struct mb2_cache_entry *ce = NULL;
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struct mb_cache_entry *ce = NULL;
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int error = 0;
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struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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#define header(x) ((struct ext4_xattr_header *)(x))
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@ -805,8 +805,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
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* ext4_xattr_block_set() to reliably detect modified
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* block
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*/
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mb2_cache_entry_delete_block(ext4_mb_cache, hash,
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bs->bh->b_blocknr);
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mb_cache_entry_delete_block(ext4_mb_cache, hash,
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bs->bh->b_blocknr);
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ea_bdebug(bs->bh, "modifying in-place");
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error = ext4_xattr_set_entry(i, s);
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if (!error) {
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@ -904,7 +904,7 @@ inserted:
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EXT4_C2B(EXT4_SB(sb),
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1));
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brelse(new_bh);
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mb2_cache_entry_put(ext4_mb_cache, ce);
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mb_cache_entry_put(ext4_mb_cache, ce);
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ce = NULL;
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new_bh = NULL;
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goto inserted;
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@ -919,8 +919,8 @@ inserted:
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if (error)
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goto cleanup_dquot;
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}
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mb2_cache_entry_touch(ext4_mb_cache, ce);
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mb2_cache_entry_put(ext4_mb_cache, ce);
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mb_cache_entry_touch(ext4_mb_cache, ce);
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mb_cache_entry_put(ext4_mb_cache, ce);
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ce = NULL;
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} else if (bs->bh && s->base == bs->bh->b_data) {
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/* We were modifying this block in-place. */
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@ -985,7 +985,7 @@ getblk_failed:
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cleanup:
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if (ce)
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mb2_cache_entry_put(ext4_mb_cache, ce);
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mb_cache_entry_put(ext4_mb_cache, ce);
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brelse(new_bh);
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if (!(bs->bh && s->base == bs->bh->b_data))
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kfree(s->base);
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@ -1546,13 +1546,13 @@ cleanup:
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* Returns 0, or a negative error number on failure.
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*/
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static void
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ext4_xattr_cache_insert(struct mb2_cache *ext4_mb_cache, struct buffer_head *bh)
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ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh)
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{
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__u32 hash = le32_to_cpu(BHDR(bh)->h_hash);
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int error;
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error = mb2_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash,
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bh->b_blocknr);
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error = mb_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash,
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bh->b_blocknr);
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if (error) {
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if (error == -EBUSY)
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ea_bdebug(bh, "already in cache");
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@ -1610,16 +1610,16 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1,
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*/
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static struct buffer_head *
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ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header,
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struct mb2_cache_entry **pce)
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struct mb_cache_entry **pce)
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{
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__u32 hash = le32_to_cpu(header->h_hash);
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struct mb2_cache_entry *ce;
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struct mb2_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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struct mb_cache_entry *ce;
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struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
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if (!header->h_hash)
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return NULL; /* never share */
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ea_idebug(inode, "looking for cached blocks [%x]", (int)hash);
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ce = mb2_cache_entry_find_first(ext4_mb_cache, hash);
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ce = mb_cache_entry_find_first(ext4_mb_cache, hash);
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while (ce) {
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struct buffer_head *bh;
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@ -1638,7 +1638,7 @@ ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header,
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return bh;
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}
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brelse(bh);
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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);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -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,
|
||||
|
|
|
|||
|
|
@ -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)");
|
||||
|
|
@ -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 */
|
||||
|
|
@ -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 */
|
||||
Loading…
Reference in New Issue