u32 cpos,
u64 start_blk,
u32 new_clusters,
+ u8 flags,
struct ocfs2_alloc_context *meta_ac)
{
int status;
rec.e_cpos = cpu_to_le32(cpos);
rec.e_blkno = cpu_to_le64(start_blk);
rec.e_leaf_clusters = cpu_to_le16(new_clusters);
+ rec.e_flags = flags;
status = ocfs2_figure_insert_type(inode, fe_bh, &last_eb_bh, &rec,
&insert);
return ret;
}
-static inline int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
+static int ocfs2_split_tree(struct inode *inode, struct buffer_head *di_bh,
+ handle_t *handle, struct ocfs2_path *path,
+ int index, u32 new_range,
+ struct ocfs2_alloc_context *meta_ac)
+{
+ int ret, depth, credits = handle->h_buffer_credits;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ struct buffer_head *last_eb_bh = NULL;
+ struct ocfs2_extent_block *eb;
+ struct ocfs2_extent_list *rightmost_el, *el;
+ struct ocfs2_extent_rec split_rec;
+ struct ocfs2_extent_rec *rec;
+ struct ocfs2_insert_type insert;
+
+ /*
+ * Setup the record to split before we grow the tree.
+ */
+ el = path_leaf_el(path);
+ rec = &el->l_recs[index];
+ ocfs2_make_right_split_rec(inode->i_sb, &split_rec, new_range, rec);
+
+ depth = path->p_tree_depth;
+ if (depth > 0) {
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+ le64_to_cpu(di->i_last_eb_blk),
+ &last_eb_bh, OCFS2_BH_CACHED, inode);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
+ rightmost_el = &eb->h_list;
+ } else
+ rightmost_el = path_leaf_el(path);
+
+ credits += path->p_tree_depth + ocfs2_extend_meta_needed(di);
+ ret = ocfs2_extend_trans(handle, credits);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (le16_to_cpu(rightmost_el->l_next_free_rec) ==
+ le16_to_cpu(rightmost_el->l_count)) {
+ int old_depth = depth;
+
+ ret = ocfs2_grow_tree(inode, handle, di_bh, &depth, &last_eb_bh,
+ meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (old_depth != depth) {
+ eb = (struct ocfs2_extent_block *)last_eb_bh->b_data;
+ rightmost_el = &eb->h_list;
+ }
+ }
+
+ memset(&insert, 0, sizeof(struct ocfs2_insert_type));
+ insert.ins_appending = APPEND_NONE;
+ insert.ins_contig = CONTIG_NONE;
+ insert.ins_split = SPLIT_RIGHT;
+ insert.ins_free_records = le16_to_cpu(rightmost_el->l_count)
+ - le16_to_cpu(rightmost_el->l_next_free_rec);
+ insert.ins_tree_depth = depth;
+
+ ret = ocfs2_do_insert_extent(inode, handle, di_bh, &split_rec, &insert);
+ if (ret)
+ mlog_errno(ret);
+
+out:
+ brelse(last_eb_bh);
+ return ret;
+}
+
+static int ocfs2_truncate_rec(struct inode *inode, handle_t *handle,
+ struct ocfs2_path *path, int index,
+ struct ocfs2_cached_dealloc_ctxt *dealloc,
+ u32 cpos, u32 len)
+{
+ int ret;
+ u32 left_cpos, rec_range, trunc_range;
+ int wants_rotate = 0, is_rightmost_tree_rec = 0;
+ struct super_block *sb = inode->i_sb;
+ struct ocfs2_path *left_path = NULL;
+ struct ocfs2_extent_list *el = path_leaf_el(path);
+ struct ocfs2_extent_rec *rec;
+ struct ocfs2_extent_block *eb;
+
+ if (ocfs2_is_empty_extent(&el->l_recs[0]) && index > 0) {
+ ret = ocfs2_rotate_tree_left(inode, handle, path, dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ index--;
+ }
+
+ if (index == (le16_to_cpu(el->l_next_free_rec) - 1) &&
+ path->p_tree_depth) {
+ /*
+ * Check whether this is the rightmost tree record. If
+ * we remove all of this record or part of its right
+ * edge then an update of the record lengths above it
+ * will be required.
+ */
+ eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
+ if (eb->h_next_leaf_blk == 0)
+ is_rightmost_tree_rec = 1;
+ }
+
+ rec = &el->l_recs[index];
+ if (index == 0 && path->p_tree_depth &&
+ le32_to_cpu(rec->e_cpos) == cpos) {
+ /*
+ * Changing the leftmost offset (via partial or whole
+ * record truncate) of an interior (or rightmost) path
+ * means we have to update the subtree that is formed
+ * by this leaf and the one to it's left.
+ *
+ * There are two cases we can skip:
+ * 1) Path is the leftmost one in our inode tree.
+ * 2) The leaf is rightmost and will be empty after
+ * we remove the extent record - the rotate code
+ * knows how to update the newly formed edge.
+ */
+
+ ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, path,
+ &left_cpos);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (left_cpos && le16_to_cpu(el->l_next_free_rec) > 1) {
+ left_path = ocfs2_new_path(path_root_bh(path),
+ path_root_el(path));
+ if (!left_path) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_find_path(inode, left_path, left_cpos);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+ }
+
+ ret = ocfs2_extend_rotate_transaction(handle, 0,
+ handle->h_buffer_credits,
+ path);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_journal_access_path(inode, handle, path);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_journal_access_path(inode, handle, left_path);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ rec_range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
+ trunc_range = cpos + len;
+
+ if (le32_to_cpu(rec->e_cpos) == cpos && rec_range == trunc_range) {
+ int next_free;
+
+ memset(rec, 0, sizeof(*rec));
+ ocfs2_cleanup_merge(el, index);
+ wants_rotate = 1;
+
+ next_free = le16_to_cpu(el->l_next_free_rec);
+ if (is_rightmost_tree_rec && next_free > 1) {
+ /*
+ * We skip the edge update if this path will
+ * be deleted by the rotate code.
+ */
+ rec = &el->l_recs[next_free - 1];
+ ocfs2_adjust_rightmost_records(inode, handle, path,
+ rec);
+ }
+ } else if (le32_to_cpu(rec->e_cpos) == cpos) {
+ /* Remove leftmost portion of the record. */
+ le32_add_cpu(&rec->e_cpos, len);
+ le64_add_cpu(&rec->e_blkno, ocfs2_clusters_to_blocks(sb, len));
+ le16_add_cpu(&rec->e_leaf_clusters, -len);
+ } else if (rec_range == trunc_range) {
+ /* Remove rightmost portion of the record */
+ le16_add_cpu(&rec->e_leaf_clusters, -len);
+ if (is_rightmost_tree_rec)
+ ocfs2_adjust_rightmost_records(inode, handle, path, rec);
+ } else {
+ /* Caller should have trapped this. */
+ mlog(ML_ERROR, "Inode %llu: Invalid record truncate: (%u, %u) "
+ "(%u, %u)\n", (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ le32_to_cpu(rec->e_cpos),
+ le16_to_cpu(rec->e_leaf_clusters), cpos, len);
+ BUG();
+ }
+
+ if (left_path) {
+ int subtree_index;
+
+ subtree_index = ocfs2_find_subtree_root(inode, left_path, path);
+ ocfs2_complete_edge_insert(inode, handle, left_path, path,
+ subtree_index);
+ }
+
+ ocfs2_journal_dirty(handle, path_leaf_bh(path));
+
+ ret = ocfs2_rotate_tree_left(inode, handle, path, dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+out:
+ ocfs2_free_path(left_path);
+ return ret;
+}
+
+int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh,
+ u32 cpos, u32 len, handle_t *handle,
+ struct ocfs2_alloc_context *meta_ac,
+ struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+ int ret, index;
+ u32 rec_range, trunc_range;
+ struct ocfs2_extent_rec *rec;
+ struct ocfs2_extent_list *el;
+ struct ocfs2_path *path;
+
+ ocfs2_extent_map_trunc(inode, 0);
+
+ path = ocfs2_new_inode_path(di_bh);
+ if (!path) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_find_path(inode, path, cpos);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ el = path_leaf_el(path);
+ index = ocfs2_search_extent_list(el, cpos);
+ if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) {
+ ocfs2_error(inode->i_sb,
+ "Inode %llu has an extent at cpos %u which can no "
+ "longer be found.\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno, cpos);
+ ret = -EROFS;
+ goto out;
+ }
+
+ /*
+ * We have 3 cases of extent removal:
+ * 1) Range covers the entire extent rec
+ * 2) Range begins or ends on one edge of the extent rec
+ * 3) Range is in the middle of the extent rec (no shared edges)
+ *
+ * For case 1 we remove the extent rec and left rotate to
+ * fill the hole.
+ *
+ * For case 2 we just shrink the existing extent rec, with a
+ * tree update if the shrinking edge is also the edge of an
+ * extent block.
+ *
+ * For case 3 we do a right split to turn the extent rec into
+ * something case 2 can handle.
+ */
+ rec = &el->l_recs[index];
+ rec_range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
+ trunc_range = cpos + len;
+
+ BUG_ON(cpos < le32_to_cpu(rec->e_cpos) || trunc_range > rec_range);
+
+ mlog(0, "Inode %llu, remove (cpos %u, len %u). Existing index %d "
+ "(cpos %u, len %u)\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno, cpos, len, index,
+ le32_to_cpu(rec->e_cpos), ocfs2_rec_clusters(el, rec));
+
+ if (le32_to_cpu(rec->e_cpos) == cpos || rec_range == trunc_range) {
+ ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,
+ cpos, len);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ } else {
+ ret = ocfs2_split_tree(inode, di_bh, handle, path, index,
+ trunc_range, meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * The split could have manipulated the tree enough to
+ * move the record location, so we have to look for it again.
+ */
+ ocfs2_reinit_path(path, 1);
+
+ ret = ocfs2_find_path(inode, path, cpos);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ el = path_leaf_el(path);
+ index = ocfs2_search_extent_list(el, cpos);
+ if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) {
+ ocfs2_error(inode->i_sb,
+ "Inode %llu: split at cpos %u lost record.",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ cpos);
+ ret = -EROFS;
+ goto out;
+ }
+
+ /*
+ * Double check our values here. If anything is fishy,
+ * it's easier to catch it at the top level.
+ */
+ rec = &el->l_recs[index];
+ rec_range = le32_to_cpu(rec->e_cpos) +
+ ocfs2_rec_clusters(el, rec);
+ if (rec_range != trunc_range) {
+ ocfs2_error(inode->i_sb,
+ "Inode %llu: error after split at cpos %u"
+ "trunc len %u, existing record is (%u,%u)",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ cpos, len, le32_to_cpu(rec->e_cpos),
+ ocfs2_rec_clusters(el, rec));
+ ret = -EROFS;
+ goto out;
+ }
+
+ ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,
+ cpos, len);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+out:
+ ocfs2_free_path(path);
+ return ret;
+}
+
+int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
{
struct buffer_head *tl_bh = osb->osb_tl_bh;
struct ocfs2_dinode *di;
return current_tail == new_start;
}
-static int ocfs2_truncate_log_append(struct ocfs2_super *osb,
- handle_t *handle,
- u64 start_blk,
- unsigned int num_clusters)
+int ocfs2_truncate_log_append(struct ocfs2_super *osb,
+ handle_t *handle,
+ u64 start_blk,
+ unsigned int num_clusters)
{
int status, index;
unsigned int start_cluster, tl_count;
}
/* Expects you to already be holding tl_inode->i_mutex */
-static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
+int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
{
int status;
unsigned int num_to_flush;
return ocfs2_journal_dirty_data(handle, bh);
}
-static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t isize,
- struct page **pages, int numpages,
- u64 phys, handle_t *handle)
+static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t start,
+ loff_t end, struct page **pages,
+ int numpages, u64 phys, handle_t *handle)
{
int i, ret, partial = 0;
void *kaddr;
if (numpages == 0)
goto out;
- from = isize & (PAGE_CACHE_SIZE - 1); /* 1st page offset */
- if (PAGE_CACHE_SHIFT > OCFS2_SB(sb)->s_clustersize_bits) {
- /*
- * Since 'from' has been capped to a value below page
- * size, this calculation won't be able to overflow
- * 'to'
- */
- to = ocfs2_align_bytes_to_clusters(sb, from);
-
- /*
- * The truncate tail in this case should never contain
- * more than one page at maximum. The loop below also
- * assumes this.
- */
- BUG_ON(numpages != 1);
- }
-
+ to = PAGE_CACHE_SIZE;
for(i = 0; i < numpages; i++) {
page = pages[i];
+ from = start & (PAGE_CACHE_SIZE - 1);
+ if ((end >> PAGE_CACHE_SHIFT) == page->index)
+ to = end & (PAGE_CACHE_SIZE - 1);
+
BUG_ON(from > PAGE_CACHE_SIZE);
BUG_ON(to > PAGE_CACHE_SIZE);
flush_dcache_page(page);
- /*
- * Every page after the 1st one should be completely zero'd.
- */
- from = 0;
+ start = (page->index + 1) << PAGE_CACHE_SHIFT;
}
out:
if (pages) {
}
}
-static int ocfs2_grab_eof_pages(struct inode *inode, loff_t isize, struct page **pages,
- int *num, u64 *phys)
+static int ocfs2_grab_eof_pages(struct inode *inode, loff_t start, loff_t end,
+ struct page **pages, int *num, u64 *phys)
{
int i, numpages = 0, ret = 0;
- unsigned int csize = OCFS2_SB(inode->i_sb)->s_clustersize;
unsigned int ext_flags;
struct super_block *sb = inode->i_sb;
struct address_space *mapping = inode->i_mapping;
unsigned long index;
- u64 next_cluster_bytes;
+ loff_t last_page_bytes;
BUG_ON(!ocfs2_sparse_alloc(OCFS2_SB(sb)));
+ BUG_ON(start > end);
- /* Cluster boundary, so we don't need to grab any pages. */
- if ((isize & (csize - 1)) == 0)
+ if (start == end)
goto out;
- ret = ocfs2_extent_map_get_blocks(inode, isize >> sb->s_blocksize_bits,
+ BUG_ON(start >> OCFS2_SB(sb)->s_clustersize_bits !=
+ (end - 1) >> OCFS2_SB(sb)->s_clustersize_bits);
+
+ ret = ocfs2_extent_map_get_blocks(inode, start >> sb->s_blocksize_bits,
phys, NULL, &ext_flags);
if (ret) {
mlog_errno(ret);
if (ext_flags & OCFS2_EXT_UNWRITTEN)
goto out;
- next_cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, isize);
- index = isize >> PAGE_CACHE_SHIFT;
+ last_page_bytes = PAGE_ALIGN(end);
+ index = start >> PAGE_CACHE_SHIFT;
do {
pages[numpages] = grab_cache_page(mapping, index);
if (!pages[numpages]) {
numpages++;
index++;
- } while (index < (next_cluster_bytes >> PAGE_CACHE_SHIFT));
+ } while (index < (last_page_bytes >> PAGE_CACHE_SHIFT));
out:
if (ret != 0) {
* otherwise block_write_full_page() will skip writeout of pages past
* i_size. The new_i_size parameter is passed for this reason.
*/
-int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
- u64 new_i_size)
+int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle,
+ u64 range_start, u64 range_end)
{
int ret, numpages;
- loff_t endbyte;
struct page **pages = NULL;
u64 phys;
goto out;
}
- ret = ocfs2_grab_eof_pages(inode, new_i_size, pages, &numpages, &phys);
+ ret = ocfs2_grab_eof_pages(inode, range_start, range_end, pages,
+ &numpages, &phys);
if (ret) {
mlog_errno(ret);
goto out;
if (numpages == 0)
goto out;
- ocfs2_zero_cluster_pages(inode, new_i_size, pages, numpages, phys,
- handle);
+ ocfs2_zero_cluster_pages(inode, range_start, range_end, pages,
+ numpages, phys, handle);
/*
* Initiate writeout of the pages we zero'd here. We don't
* wait on them - the truncate_inode_pages() call later will
* do that for us.
*/
- endbyte = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
- ret = do_sync_mapping_range(inode->i_mapping, new_i_size,
- endbyte - 1, SYNC_FILE_RANGE_WRITE);
+ ret = do_sync_mapping_range(inode->i_mapping, range_start,
+ range_end - 1, SYNC_FILE_RANGE_WRITE);
if (ret)
mlog_errno(ret);
projects / firefly-linux-kernel-4.4.55.git / blobdiff