diff options
| -rw-r--r-- | fs/ocfs2/aops.c | 108 |
1 files changed, 76 insertions, 32 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 510bf84..077583b 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -1188,6 +1188,31 @@ out: return ret; } +static int ocfs2_write_cluster_by_desc(struct address_space *mapping, + struct ocfs2_alloc_context *data_ac, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_write_ctxt *wc, + loff_t pos, unsigned len) +{ + int ret, i; + struct ocfs2_write_cluster_desc *desc; + + for (i = 0; i < wc->w_clen; i++) { + desc = &wc->w_desc[i]; + + ret = ocfs2_write_cluster(mapping, desc->c_phys, data_ac, + meta_ac, wc, desc->c_cpos, pos, len); + if (ret) { + mlog_errno(ret); + goto out; + } + } + + ret = 0; +out: + return ret; +} + /* * ocfs2_write_end() wants to know which parts of the target page it * should complete the write on. It's easiest to compute them ahead of @@ -1240,30 +1265,19 @@ static void ocfs2_set_target_boundaries(struct ocfs2_super *osb, } } -int ocfs2_write_begin_nolock(struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata, - struct buffer_head *di_bh, struct page *mmap_page) +/* + * Populate each single-cluster write descriptor in the write context + * with information about the i/o to be done. + */ +static int ocfs2_populate_write_desc(struct inode *inode, + struct ocfs2_write_ctxt *wc, + unsigned int *clusters_to_alloc) { - int ret, i, credits = OCFS2_INODE_UPDATE_CREDITS; - unsigned int num_clusters = 0, clusters_to_alloc = 0; - u32 phys = 0; - struct ocfs2_write_ctxt *wc; - struct inode *inode = mapping->host; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - struct ocfs2_dinode *di; - struct ocfs2_alloc_context *data_ac = NULL; - struct ocfs2_alloc_context *meta_ac = NULL; - handle_t *handle; + int ret; struct ocfs2_write_cluster_desc *desc; - - ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh); - if (ret) { - mlog_errno(ret); - return ret; - } - - di = (struct ocfs2_dinode *)wc->w_di_bh->b_data; + unsigned int num_clusters = 0; + u32 phys = 0; + int i; for (i = 0; i < wc->w_clen; i++) { desc = &wc->w_desc[i]; @@ -1287,12 +1301,46 @@ int ocfs2_write_begin_nolock(struct address_space *mapping, desc->c_phys = phys; if (phys == 0) { desc->c_new = 1; - clusters_to_alloc++; + *clusters_to_alloc = *clusters_to_alloc + 1; } num_clusters--; } + ret = 0; +out: + return ret; +} + +int ocfs2_write_begin_nolock(struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata, + struct buffer_head *di_bh, struct page *mmap_page) +{ + int ret, credits = OCFS2_INODE_UPDATE_CREDITS; + unsigned int clusters_to_alloc = 0; + struct ocfs2_write_ctxt *wc; + struct inode *inode = mapping->host; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_dinode *di; + struct ocfs2_alloc_context *data_ac = NULL; + struct ocfs2_alloc_context *meta_ac = NULL; + handle_t *handle; + + ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh); + if (ret) { + mlog_errno(ret); + return ret; + } + + ret = ocfs2_populate_write_desc(inode, wc, &clusters_to_alloc); + if (ret) { + mlog_errno(ret); + goto out; + } + + di = (struct ocfs2_dinode *)wc->w_di_bh->b_data; + /* * We set w_target_from, w_target_to here so that * ocfs2_write_end() knows which range in the target page to @@ -1351,15 +1399,11 @@ int ocfs2_write_begin_nolock(struct address_space *mapping, goto out_commit; } - for (i = 0; i < wc->w_clen; i++) { - desc = &wc->w_desc[i]; - - ret = ocfs2_write_cluster(mapping, desc->c_phys, data_ac, - meta_ac, wc, desc->c_cpos, pos, len); - if (ret) { - mlog_errno(ret); - goto out_commit; - } + ret = ocfs2_write_cluster_by_desc(mapping, data_ac, meta_ac, wc, pos, + len); + if (ret) { + mlog_errno(ret); + goto out_commit; } if (data_ac) |
