From c934a92d05b549dd2f25db72c5fc3cb9dcf1b611 Mon Sep 17 00:00:00 2001 From: Mark Fasheh Date: Thu, 18 Oct 2007 15:23:46 -0700 Subject: [PATCH] ocfs2: Remove data locks The meta lock now covers both meta data and data, so this just removes the now-redundant data lock. Combining locks saves us a round of lock mastery per inode and one less lock to ping between nodes during read/write. We don't lose much - since meta locks were always held before a data lock (and at the same level) ordered writeout mode (the default) ensured that flushing for the meta data lock also pushed out data anyways. Signed-off-by: Mark Fasheh --- fs/ocfs2/aops.c | 44 +------------- fs/ocfs2/cluster/tcp_internal.h | 5 +- fs/ocfs2/dlmglue.c | 104 -------------------------------- fs/ocfs2/dlmglue.h | 11 +--- fs/ocfs2/file.c | 55 +++++------------ fs/ocfs2/inode.c | 6 -- fs/ocfs2/inode.h | 1 - fs/ocfs2/mmap.c | 9 --- fs/ocfs2/super.c | 1 - 9 files changed, 22 insertions(+), 214 deletions(-) diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 56f7790cad46..5fc27cfaee50 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -305,21 +305,12 @@ static int ocfs2_readpage(struct file *file, struct page *page) goto out_alloc; } - ret = ocfs2_data_lock_with_page(inode, 0, page); - if (ret != 0) { - if (ret == AOP_TRUNCATED_PAGE) - unlock = 0; - mlog_errno(ret); - goto out_alloc; - } - if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) ret = ocfs2_readpage_inline(inode, page); else ret = block_read_full_page(page, ocfs2_get_block); unlock = 0; - ocfs2_data_unlock(inode, 0); out_alloc: up_read(&OCFS2_I(inode)->ip_alloc_sem); out_meta_unlock: @@ -638,34 +629,12 @@ static ssize_t ocfs2_direct_IO(int rw, if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) return 0; - if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) { - /* - * We get PR data locks even for O_DIRECT. This - * allows concurrent O_DIRECT I/O but doesn't let - * O_DIRECT with extending and buffered zeroing writes - * race. If they did race then the buffered zeroing - * could be written back after the O_DIRECT I/O. It's - * one thing to tell people not to mix buffered and - * O_DIRECT writes, but expecting them to understand - * that file extension is also an implicit buffered - * write is too much. By getting the PR we force - * writeback of the buffered zeroing before - * proceeding. - */ - ret = ocfs2_data_lock(inode, 0); - if (ret < 0) { - mlog_errno(ret); - goto out; - } - ocfs2_data_unlock(inode, 0); - } - ret = blockdev_direct_IO_no_locking(rw, iocb, inode, inode->i_sb->s_bdev, iov, offset, nr_segs, ocfs2_direct_IO_get_blocks, ocfs2_dio_end_io); -out: + mlog_exit(ret); return ret; } @@ -1769,25 +1738,17 @@ static int ocfs2_write_begin(struct file *file, struct address_space *mapping, */ down_write(&OCFS2_I(inode)->ip_alloc_sem); - ret = ocfs2_data_lock(inode, 1); - if (ret) { - mlog_errno(ret); - goto out_fail; - } - ret = ocfs2_write_begin_nolock(mapping, pos, len, flags, pagep, fsdata, di_bh, NULL); if (ret) { mlog_errno(ret); - goto out_fail_data; + goto out_fail; } brelse(di_bh); return 0; -out_fail_data: - ocfs2_data_unlock(inode, 1); out_fail: up_write(&OCFS2_I(inode)->ip_alloc_sem); @@ -1908,7 +1869,6 @@ static int ocfs2_write_end(struct file *file, struct address_space *mapping, ret = ocfs2_write_end_nolock(mapping, pos, len, copied, page, fsdata); - ocfs2_data_unlock(inode, 1); up_write(&OCFS2_I(inode)->ip_alloc_sem); ocfs2_meta_unlock(inode, 1); diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h index 79bd6665b3ca..b2e832aca567 100644 --- a/fs/ocfs2/cluster/tcp_internal.h +++ b/fs/ocfs2/cluster/tcp_internal.h @@ -38,6 +38,9 @@ * locking semantics of the file system using the protocol. It should * be somewhere else, I'm sure, but right now it isn't. * + * New in version 10: + * - Meta/data locks combined + * * New in version 9: * - All votes removed * @@ -63,7 +66,7 @@ * - full 64 bit i_size in the metadata lock lvbs * - introduction of "rw" lock and pushing meta/data locking down */ -#define O2NET_PROTOCOL_VERSION 9ULL +#define O2NET_PROTOCOL_VERSION 10ULL struct o2net_handshake { __be64 protocol_version; __be64 connector_id; diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 7e36abea8f40..ecf58c6e2fa3 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -232,12 +232,6 @@ static struct ocfs2_lock_res_ops ocfs2_inode_meta_lops = { .flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB, }; -static struct ocfs2_lock_res_ops ocfs2_inode_data_lops = { - .get_osb = ocfs2_get_inode_osb, - .downconvert_worker = ocfs2_data_convert_worker, - .flags = 0, -}; - static struct ocfs2_lock_res_ops ocfs2_super_lops = { .flags = LOCK_TYPE_REQUIRES_REFRESH, }; @@ -261,7 +255,6 @@ static struct ocfs2_lock_res_ops ocfs2_inode_open_lops = { static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres) { return lockres->l_type == OCFS2_LOCK_TYPE_META || - lockres->l_type == OCFS2_LOCK_TYPE_DATA || lockres->l_type == OCFS2_LOCK_TYPE_RW || lockres->l_type == OCFS2_LOCK_TYPE_OPEN; } @@ -405,9 +398,6 @@ void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, case OCFS2_LOCK_TYPE_META: ops = &ocfs2_inode_meta_lops; break; - case OCFS2_LOCK_TYPE_DATA: - ops = &ocfs2_inode_data_lops; - break; case OCFS2_LOCK_TYPE_OPEN: ops = &ocfs2_inode_open_lops; break; @@ -1154,12 +1144,6 @@ int ocfs2_create_new_inode_locks(struct inode *inode) goto bail; } - ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_data_lockres, 1, 1); - if (ret) { - mlog_errno(ret); - goto bail; - } - ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_open_lockres, 0, 0); if (ret) { mlog_errno(ret); @@ -1312,67 +1296,6 @@ out: mlog_exit_void(); } -int ocfs2_data_lock_full(struct inode *inode, - int write, - int arg_flags) -{ - int status = 0, level; - struct ocfs2_lock_res *lockres; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - - BUG_ON(!inode); - - mlog_entry_void(); - - mlog(0, "inode %llu take %s DATA lock\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - write ? "EXMODE" : "PRMODE"); - - /* We'll allow faking a readonly data lock for - * rodevices. */ - if (ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb))) { - if (write) { - status = -EROFS; - mlog_errno(status); - } - goto out; - } - - if (ocfs2_mount_local(osb)) - goto out; - - lockres = &OCFS2_I(inode)->ip_data_lockres; - - level = write ? LKM_EXMODE : LKM_PRMODE; - - status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, level, - 0, arg_flags); - if (status < 0 && status != -EAGAIN) - mlog_errno(status); - -out: - mlog_exit(status); - return status; -} - -/* see ocfs2_meta_lock_with_page() */ -int ocfs2_data_lock_with_page(struct inode *inode, - int write, - struct page *page) -{ - int ret; - - ret = ocfs2_data_lock_full(inode, write, OCFS2_LOCK_NONBLOCK); - if (ret == -EAGAIN) { - unlock_page(page); - if (ocfs2_data_lock(inode, write) == 0) - ocfs2_data_unlock(inode, write); - ret = AOP_TRUNCATED_PAGE; - } - - return ret; -} - static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) { @@ -1404,26 +1327,6 @@ static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb, mlog_exit_void(); } -void ocfs2_data_unlock(struct inode *inode, - int write) -{ - int level = write ? LKM_EXMODE : LKM_PRMODE; - struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_data_lockres; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - - mlog_entry_void(); - - mlog(0, "inode %llu drop %s DATA lock\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - write ? "EXMODE" : "PRMODE"); - - if (!ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb)) && - !ocfs2_mount_local(osb)) - ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level); - - mlog_exit_void(); -} - #define OCFS2_SEC_BITS 34 #define OCFS2_SEC_SHIFT (64 - 34) #define OCFS2_NSEC_MASK ((1ULL << OCFS2_SEC_SHIFT) - 1) @@ -2591,13 +2494,6 @@ int ocfs2_drop_inode_locks(struct inode *inode) status = err; - err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), - &OCFS2_I(inode)->ip_data_lockres); - if (err < 0) - mlog_errno(err); - if (err < 0 && !status) - status = err; - err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), &OCFS2_I(inode)->ip_meta_lockres); if (err < 0) diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h index 931f6ee55146..3fd7729daeef 100644 --- a/fs/ocfs2/dlmglue.h +++ b/fs/ocfs2/dlmglue.h @@ -49,7 +49,7 @@ struct ocfs2_meta_lvb { __be32 lvb_reserved2; }; -/* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */ +/* ocfs2_meta_lock_full() 'arg_flags' flags */ /* don't wait on recovery. */ #define OCFS2_META_LOCK_RECOVERY (0x01) /* Instruct the dlm not to queue ourselves on the other node. */ @@ -69,15 +69,6 @@ void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, void ocfs2_lock_res_free(struct ocfs2_lock_res *res); int ocfs2_create_new_inode_locks(struct inode *inode); int ocfs2_drop_inode_locks(struct inode *inode); -int ocfs2_data_lock_full(struct inode *inode, - int write, - int arg_flags); -#define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0) -int ocfs2_data_lock_with_page(struct inode *inode, - int write, - struct page *page); -void ocfs2_data_unlock(struct inode *inode, - int write); int ocfs2_rw_lock(struct inode *inode, int write); void ocfs2_rw_unlock(struct inode *inode, int write); int ocfs2_open_lock(struct inode *inode); diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index b75b2e1f0e42..c5c183ac41fe 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -382,18 +382,13 @@ static int ocfs2_truncate_file(struct inode *inode, down_write(&OCFS2_I(inode)->ip_alloc_sem); - /* This forces other nodes to sync and drop their pages. Do - * this even if we have a truncate without allocation change - - * ocfs2 cluster sizes can be much greater than page size, so - * we have to truncate them anyway. */ - status = ocfs2_data_lock(inode, 1); - if (status < 0) { - up_write(&OCFS2_I(inode)->ip_alloc_sem); - - mlog_errno(status); - goto bail; - } - + /* + * The inode lock forced other nodes to sync and drop their + * pages, which (correctly) happens even if we have a truncate + * without allocation change - ocfs2 cluster sizes can be much + * greater than page size, so we have to truncate them + * anyway. + */ unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); truncate_inode_pages(inode->i_mapping, new_i_size); @@ -403,7 +398,7 @@ static int ocfs2_truncate_file(struct inode *inode, if (status) mlog_errno(status); - goto bail_unlock_data; + goto bail_unlock_sem; } /* alright, we're going to need to do a full blown alloc size @@ -413,25 +408,23 @@ static int ocfs2_truncate_file(struct inode *inode, status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); if (status < 0) { mlog_errno(status); - goto bail_unlock_data; + goto bail_unlock_sem; } status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); if (status < 0) { mlog_errno(status); - goto bail_unlock_data; + goto bail_unlock_sem; } status = ocfs2_commit_truncate(osb, inode, di_bh, tc); if (status < 0) { mlog_errno(status); - goto bail_unlock_data; + goto bail_unlock_sem; } /* TODO: orphan dir cleanup here. */ -bail_unlock_data: - ocfs2_data_unlock(inode, 1); - +bail_unlock_sem: up_write(&OCFS2_I(inode)->ip_alloc_sem); bail: @@ -917,7 +910,7 @@ static int ocfs2_extend_file(struct inode *inode, struct buffer_head *di_bh, u64 new_i_size) { - int ret = 0, data_locked = 0; + int ret = 0; struct ocfs2_inode_info *oi = OCFS2_I(inode); BUG_ON(!di_bh); @@ -943,20 +936,6 @@ static int ocfs2_extend_file(struct inode *inode, && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) goto out_update_size; - /* - * protect the pages that ocfs2_zero_extend is going to be - * pulling into the page cache.. we do this before the - * metadata extend so that we don't get into the situation - * where we've extended the metadata but can't get the data - * lock to zero. - */ - ret = ocfs2_data_lock(inode, 1); - if (ret < 0) { - mlog_errno(ret); - goto out; - } - data_locked = 1; - /* * The alloc sem blocks people in read/write from reading our * allocation until we're done changing it. We depend on @@ -980,7 +959,7 @@ static int ocfs2_extend_file(struct inode *inode, up_write(&oi->ip_alloc_sem); mlog_errno(ret); - goto out_unlock; + goto out; } } @@ -991,7 +970,7 @@ static int ocfs2_extend_file(struct inode *inode, if (ret < 0) { mlog_errno(ret); - goto out_unlock; + goto out; } out_update_size: @@ -999,10 +978,6 @@ out_update_size: if (ret < 0) mlog_errno(ret); -out_unlock: - if (data_locked) - ocfs2_data_unlock(inode, 1); - out: return ret; } diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index 86cf073996b5..8ff201d3705e 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -332,10 +332,6 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, OCFS2_LOCK_TYPE_RW, inode->i_generation, inode); - ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres, - OCFS2_LOCK_TYPE_DATA, inode->i_generation, - inode); - ocfs2_set_inode_flags(inode); status = 0; @@ -1014,7 +1010,6 @@ void ocfs2_clear_inode(struct inode *inode) * the downconvert thread while waiting to destroy the locks. */ ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres); ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres); - ocfs2_mark_lockres_freeing(&oi->ip_data_lockres); ocfs2_mark_lockres_freeing(&oi->ip_open_lockres); /* We very well may get a clear_inode before all an inodes @@ -1038,7 +1033,6 @@ void ocfs2_clear_inode(struct inode *inode) ocfs2_lock_res_free(&oi->ip_rw_lockres); ocfs2_lock_res_free(&oi->ip_meta_lockres); - ocfs2_lock_res_free(&oi->ip_data_lockres); ocfs2_lock_res_free(&oi->ip_open_lockres); ocfs2_metadata_cache_purge(inode); diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h index 70e881c55536..d1c54da687c9 100644 --- a/fs/ocfs2/inode.h +++ b/fs/ocfs2/inode.h @@ -35,7 +35,6 @@ struct ocfs2_inode_info struct ocfs2_lock_res ip_rw_lockres; struct ocfs2_lock_res ip_meta_lockres; - struct ocfs2_lock_res ip_data_lockres; struct ocfs2_lock_res ip_open_lockres; /* protects allocation changes on this inode. */ diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c index 98756156d298..a7f0ccc6fdd8 100644 --- a/fs/ocfs2/mmap.c +++ b/fs/ocfs2/mmap.c @@ -181,17 +181,8 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page) */ down_write(&OCFS2_I(inode)->ip_alloc_sem); - ret = ocfs2_data_lock(inode, 1); - if (ret < 0) { - mlog_errno(ret); - goto out_meta_unlock; - } - ret = __ocfs2_page_mkwrite(inode, di_bh, page); - ocfs2_data_unlock(inode, 1); - -out_meta_unlock: up_write(&OCFS2_I(inode)->ip_alloc_sem); brelse(di_bh); diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 1996820488cc..064eba074f1e 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1020,7 +1020,6 @@ static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data) ocfs2_lock_res_init_once(&oi->ip_rw_lockres); ocfs2_lock_res_init_once(&oi->ip_meta_lockres); - ocfs2_lock_res_init_once(&oi->ip_data_lockres); ocfs2_lock_res_init_once(&oi->ip_open_lockres); ocfs2_metadata_cache_init(&oi->vfs_inode); -- 2.20.1