diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 09:29:20 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 09:29:20 -0700 |
commit | b64ada6b23d4a305fb3ca59b79dd38707fc53b69 (patch) | |
tree | 61bc87dc3a2549f54231261aaa544acffcd12281 /fs/ocfs2/refcounttree.h | |
parent | be90a49ca22a95f184d9f32d35b5247b44032849 (diff) | |
parent | b80474b432913f73cce8db001e9fa3104f9b79ee (diff) |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (85 commits)
ocfs2: Use buffer IO if we are appending a file.
ocfs2: add spinlock protection when dealing with lockres->purge.
dlmglue.c: add missed mlog lines
ocfs2: __ocfs2_abort() should not enable panic for local mounts
ocfs2: Add ioctl for reflink.
ocfs2: Enable refcount tree support.
ocfs2: Implement ocfs2_reflink.
ocfs2: Add preserve to reflink.
ocfs2: Create reflinked file in orphan dir.
ocfs2: Use proper parameter for some inode operation.
ocfs2: Make transaction extend more efficient.
ocfs2: Don't merge in 1st refcount ops of reflink.
ocfs2: Modify removing xattr process for refcount.
ocfs2: Add reflink support for xattr.
ocfs2: Create an xattr indexed block if needed.
ocfs2: Call refcount tree remove process properly.
ocfs2: Attach xattr clusters to refcount tree.
ocfs2: Abstract ocfs2 xattr tree extend rec iteration process.
ocfs2: Abstract the creation of xattr block.
ocfs2: Remove inode from ocfs2_xattr_bucket_get_name_value.
...
Diffstat (limited to 'fs/ocfs2/refcounttree.h')
-rw-r--r-- | fs/ocfs2/refcounttree.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h new file mode 100644 index 00000000000..c1d19b1d3ec --- /dev/null +++ b/fs/ocfs2/refcounttree.h @@ -0,0 +1,106 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * refcounttree.h + * + * Copyright (C) 2009 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#ifndef OCFS2_REFCOUNTTREE_H +#define OCFS2_REFCOUNTTREE_H + +struct ocfs2_refcount_tree { + struct rb_node rf_node; + u64 rf_blkno; + u32 rf_generation; + struct rw_semaphore rf_sem; + struct ocfs2_lock_res rf_lockres; + struct kref rf_getcnt; + int rf_removed; + + /* the following 4 fields are used by caching_info. */ + struct ocfs2_caching_info rf_ci; + spinlock_t rf_lock; + struct mutex rf_io_mutex; + struct super_block *rf_sb; +}; + +void ocfs2_purge_refcount_trees(struct ocfs2_super *osb); +int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw, + struct ocfs2_refcount_tree **tree, + struct buffer_head **ref_bh); +void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, + struct ocfs2_refcount_tree *tree, + int rw); + +int ocfs2_decrease_refcount(struct inode *inode, + handle_t *handle, u32 cpos, u32 len, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_cached_dealloc_ctxt *dealloc, + int delete); +int ocfs2_prepare_refcount_change_for_del(struct inode *inode, + struct buffer_head *di_bh, + u64 phys_blkno, + u32 clusters, + int *credits, + struct ocfs2_alloc_context **meta_ac); +int ocfs2_refcount_cow(struct inode *inode, struct buffer_head *di_bh, + u32 cpos, u32 write_len, u32 max_cpos); + +typedef int (ocfs2_post_refcount_func)(struct inode *inode, + handle_t *handle, + void *para); +/* + * Some refcount caller need to do more work after we modify the data b-tree + * during refcount operation(including CoW and add refcount flag), and make the + * transaction complete. So it must give us this structure so that we can do it + * within our transaction. + * + */ +struct ocfs2_post_refcount { + int credits; /* credits it need for journal. */ + ocfs2_post_refcount_func *func; /* real function. */ + void *para; +}; + +int ocfs2_refcounted_xattr_delete_need(struct inode *inode, + struct ocfs2_caching_info *ref_ci, + struct buffer_head *ref_root_bh, + struct ocfs2_xattr_value_root *xv, + int *meta_add, int *credits); +int ocfs2_refcount_cow_xattr(struct inode *inode, + struct ocfs2_dinode *di, + struct ocfs2_xattr_value_buf *vb, + struct ocfs2_refcount_tree *ref_tree, + struct buffer_head *ref_root_bh, + u32 cpos, u32 write_len, + struct ocfs2_post_refcount *post); +int ocfs2_add_refcount_flag(struct inode *inode, + struct ocfs2_extent_tree *data_et, + struct ocfs2_caching_info *ref_ci, + struct buffer_head *ref_root_bh, + u32 cpos, u32 p_cluster, u32 num_clusters, + struct ocfs2_cached_dealloc_ctxt *dealloc, + struct ocfs2_post_refcount *post); +int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh); +int ocfs2_try_remove_refcount_tree(struct inode *inode, + struct buffer_head *di_bh); +int ocfs2_increase_refcount(handle_t *handle, + struct ocfs2_caching_info *ci, + struct buffer_head *ref_root_bh, + u64 cpos, u32 len, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_cached_dealloc_ctxt *dealloc); +int ocfs2_reflink_ioctl(struct inode *inode, + const char __user *oldname, + const char __user *newname, + bool preserve); +#endif /* OCFS2_REFCOUNTTREE_H */ |