From 47387409ee2e09db6d0e79a026a02073dc56bb8c Mon Sep 17 00:00:00 2001 From: Tahsin Erdogan Date: Thu, 22 Jun 2017 11:28:55 -0400 Subject: ext2, ext4: make mb block cache names more explicit There will be a second mb_cache instance that tracks ea_inodes. Make existing names more explicit so that it is clear that they refer to xattr block cache. Signed-off-by: Tahsin Erdogan Signed-off-by: Theodore Ts'o --- fs/ext2/ext2.h | 2 +- fs/ext2/super.c | 16 ++++++++-------- fs/ext2/xattr.c | 36 +++++++++++++++++++----------------- 3 files changed, 28 insertions(+), 26 deletions(-) (limited to 'fs/ext2') diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 03f5ce1d3dbe..23ebb92484c6 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -113,7 +113,7 @@ struct ext2_sb_info { * of the mount options. */ spinlock_t s_lock; - struct mb_cache *s_mb_cache; + struct mb_cache *s_ea_block_cache; }; static inline spinlock_t * diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 9c2028b50e5c..7b1bc9059863 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -147,9 +147,9 @@ static void ext2_put_super (struct super_block * sb) ext2_quota_off_umount(sb); - if (sbi->s_mb_cache) { - ext2_xattr_destroy_cache(sbi->s_mb_cache); - sbi->s_mb_cache = NULL; + if (sbi->s_ea_block_cache) { + ext2_xattr_destroy_cache(sbi->s_ea_block_cache); + sbi->s_ea_block_cache = NULL; } if (!(sb->s_flags & MS_RDONLY)) { struct ext2_super_block *es = sbi->s_es; @@ -1131,9 +1131,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) } #ifdef CONFIG_EXT2_FS_XATTR - sbi->s_mb_cache = ext2_xattr_create_cache(); - if (!sbi->s_mb_cache) { - ext2_msg(sb, KERN_ERR, "Failed to create an mb_cache"); + sbi->s_ea_block_cache = ext2_xattr_create_cache(); + if (!sbi->s_ea_block_cache) { + ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache"); goto failed_mount3; } #endif @@ -1182,8 +1182,8 @@ cantfind_ext2: sb->s_id); goto failed_mount; failed_mount3: - if (sbi->s_mb_cache) - ext2_xattr_destroy_cache(sbi->s_mb_cache); + if (sbi->s_ea_block_cache) + ext2_xattr_destroy_cache(sbi->s_ea_block_cache); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c index 1e5f76070580..1b9b1268d418 100644 --- a/fs/ext2/xattr.c +++ b/fs/ext2/xattr.c @@ -121,6 +121,8 @@ const struct xattr_handler *ext2_xattr_handlers[] = { NULL }; +#define EA_BLOCK_CACHE(inode) (EXT2_SB(inode->i_sb)->s_ea_block_cache) + static inline const struct xattr_handler * ext2_xattr_handler(int name_index) { @@ -150,7 +152,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name, size_t name_len, size; char *end; int error; - struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld", name_index, name, buffer, (long)buffer_size); @@ -195,7 +197,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_get", goto found; entry = next; } - if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) + if (ext2_xattr_cache_insert(ea_block_cache, bh)) ea_idebug(inode, "cache insert failed"); error = -ENODATA; goto cleanup; @@ -208,7 +210,7 @@ found: le16_to_cpu(entry->e_value_offs) + size > inode->i_sb->s_blocksize) goto bad_block; - if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) + if (ext2_xattr_cache_insert(ea_block_cache, bh)) ea_idebug(inode, "cache insert failed"); if (buffer) { error = -ERANGE; @@ -246,7 +248,7 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size) char *end; size_t rest = buffer_size; int error; - struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); ea_idebug(inode, "buffer=%p, buffer_size=%ld", buffer, (long)buffer_size); @@ -281,7 +283,7 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_list", goto bad_block; entry = next; } - if (ext2_xattr_cache_insert(ext2_mb_cache, bh)) + if (ext2_xattr_cache_insert(ea_block_cache, bh)) ea_idebug(inode, "cache insert failed"); /* list the attribute names */ @@ -493,7 +495,7 @@ bad_block: ext2_error(sb, "ext2_xattr_set", * This must happen under buffer lock for * ext2_xattr_set2() to reliably detect modified block */ - mb_cache_entry_delete(EXT2_SB(sb)->s_mb_cache, hash, + mb_cache_entry_delete(EA_BLOCK_CACHE(inode), hash, bh->b_blocknr); /* keep the buffer locked while modifying it. */ @@ -627,7 +629,7 @@ 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 mb_cache *ext2_mb_cache = EXT2_SB(sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); if (header) { new_bh = ext2_xattr_cache_find(inode, header); @@ -655,7 +657,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, don't need to change the reference count. */ new_bh = old_bh; get_bh(new_bh); - ext2_xattr_cache_insert(ext2_mb_cache, new_bh); + ext2_xattr_cache_insert(ea_block_cache, new_bh); } else { /* We need to allocate a new block */ ext2_fsblk_t goal = ext2_group_first_block_no(sb, @@ -676,7 +678,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh, memcpy(new_bh->b_data, header, new_bh->b_size); set_buffer_uptodate(new_bh); unlock_buffer(new_bh); - ext2_xattr_cache_insert(ext2_mb_cache, new_bh); + ext2_xattr_cache_insert(ea_block_cache, new_bh); ext2_xattr_update_super_block(sb); } @@ -721,7 +723,7 @@ 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 */ - mb_cache_entry_delete(ext2_mb_cache, hash, + mb_cache_entry_delete(ea_block_cache, hash, old_bh->b_blocknr); /* Free the old block. */ ea_bdebug(old_bh, "freeing"); @@ -795,7 +797,7 @@ ext2_xattr_delete_inode(struct inode *inode) * This must happen under buffer lock for ext2_xattr_set2() to * reliably detect freed block */ - mb_cache_entry_delete(EXT2_SB(inode->i_sb)->s_mb_cache, hash, + mb_cache_entry_delete(EA_BLOCK_CACHE(inode), hash, bh->b_blocknr); ext2_free_blocks(inode, EXT2_I(inode)->i_file_acl, 1); get_bh(bh); @@ -897,13 +899,13 @@ ext2_xattr_cache_find(struct inode *inode, struct ext2_xattr_header *header) { __u32 hash = le32_to_cpu(header->h_hash); struct mb_cache_entry *ce; - struct mb_cache *ext2_mb_cache = EXT2_SB(inode->i_sb)->s_mb_cache; + struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); if (!header->h_hash) return NULL; /* never share */ ea_idebug(inode, "looking for cached blocks [%x]", (int)hash); again: - ce = mb_cache_entry_find_first(ext2_mb_cache, hash); + ce = mb_cache_entry_find_first(ea_block_cache, hash); while (ce) { struct buffer_head *bh; @@ -924,7 +926,7 @@ again: * entry is still hashed is reliable. */ if (hlist_bl_unhashed(&ce->e_hash_list)) { - mb_cache_entry_put(ext2_mb_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); unlock_buffer(bh); brelse(bh); goto again; @@ -937,14 +939,14 @@ again: } else if (!ext2_xattr_cmp(header, HDR(bh))) { ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count))); - mb_cache_entry_touch(ext2_mb_cache, ce); - mb_cache_entry_put(ext2_mb_cache, ce); + mb_cache_entry_touch(ea_block_cache, ce); + mb_cache_entry_put(ea_block_cache, ce); return bh; } unlock_buffer(bh); brelse(bh); } - ce = mb_cache_entry_find_next(ext2_mb_cache, ce); + ce = mb_cache_entry_find_next(ea_block_cache, ce); } return NULL; } -- cgit v1.2.3