Add function ocfs2_mark_extent_refcounted which can mark an extent refcounted.
Signed-off-by: Tao Ma <[email protected]> --- fs/ocfs2/alloc.c | 12 ++++++------ fs/ocfs2/alloc.h | 6 ++++++ fs/ocfs2/ocfs2.h | 7 +++++++ fs/ocfs2/refcounttree.c | 39 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 58 insertions(+), 6 deletions(-) diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index f8c41d6..bbea71c 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -5053,12 +5053,12 @@ out: return ret; } -static int ocfs2_change_extent_flag(handle_t *handle, - struct ocfs2_extent_tree *et, - u32 cpos, u32 len, u32 phys, - struct ocfs2_alloc_context *meta_ac, - struct ocfs2_cached_dealloc_ctxt *dealloc, - int new_flags, int clear_flags) +int ocfs2_change_extent_flag(handle_t *handle, + struct ocfs2_extent_tree *et, + u32 cpos, u32 len, u32 phys, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_cached_dealloc_ctxt *dealloc, + int new_flags, int clear_flags) { int ret, index; struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci); diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h index 3f43489..10a7b58 100644 --- a/fs/ocfs2/alloc.h +++ b/fs/ocfs2/alloc.h @@ -128,6 +128,12 @@ int ocfs2_mark_extent_written(struct inode *inode, handle_t *handle, u32 cpos, u32 len, u32 phys, struct ocfs2_alloc_context *meta_ac, struct ocfs2_cached_dealloc_ctxt *dealloc); +int ocfs2_change_extent_flag(handle_t *handle, + struct ocfs2_extent_tree *et, + u32 cpos, u32 len, u32 phys, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_cached_dealloc_ctxt *dealloc, + int new_flags, int clear_flags); int ocfs2_remove_extent(handle_t *handle, struct ocfs2_extent_tree *et, u32 cpos, u32 len, struct ocfs2_alloc_context *meta_ac, diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index f02b939..62bee1e 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -484,6 +484,13 @@ static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) ocfs2_set_links_count(di, links); } +static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) +{ + if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) + return 1; + return 0; +} + /* set / clear functions because cluster events can make these happen * in parallel so we want the transitions to be atomic. this also * means that any future flags osb_flags must be protected by spinlock diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index 58b2c12..8dc5f3c 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -1511,3 +1511,42 @@ out: brelse(ref_root_bh); return ret; } + +/* + * Mark the already-existing extent at cpos as refcounted for len clusters. + * This adds the refcount extent flag. + * + * If the existing extent is larger than the request, initiate a + * split. An attempt will be made at merging with adjacent extents. + * + * The caller is responsible for passing down meta_ac if we'll need it. + */ +static int ocfs2_mark_extent_refcounted(struct inode *inode, + struct ocfs2_extent_tree *et, + handle_t *handle, u32 cpos, + u32 len, u32 phys, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_cached_dealloc_ctxt *dealloc) +{ + int ret; + + mlog(0, "Inode %lu refcount tree cpos %u, len %u, phys cluster %u\n", + inode->i_ino, cpos, len, phys); + + if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) { + ocfs2_error(inode->i_sb, "Inode %lu want to use refcount " + "tree, but the feature bit is not set in the " + "super block.", inode->i_ino); + ret = -EROFS; + goto out; + } + + ret = ocfs2_change_extent_flag(handle, et, cpos, + len, phys, meta_ac, dealloc, + OCFS2_EXT_REFCOUNTED, 0); + if (ret) + mlog_errno(ret); + +out: + return ret; +} -- 1.6.2.rc2.16.gf474c _______________________________________________ Ocfs2-devel mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-devel
