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- #include <linux/fs.h>
- #include <linux/types.h>
- #include <linux/slab.h>
- #include <linux/highmem.h>
- #include <linux/swap.h>
- #include <linux/quotaops.h>
- #include <linux/blkdev.h>
- #include <cluster/masklog.h>
- #include "ocfs2.h"
- #include "alloc.h"
- #include "aops.h"
- #include "blockcheck.h"
- #include "dlmglue.h"
- #include "extent_map.h"
- #include "inode.h"
- #include "journal.h"
- #include "localalloc.h"
- #include "suballoc.h"
- #include "sysfile.h"
- #include "file.h"
- #include "super.h"
- #include "uptodate.h"
- #include "xattr.h"
- #include "refcounttree.h"
- #include "ocfs2_trace.h"
- #include "buffer_head_io.h"
- enum ocfs2_contig_type {
- CONTIG_NONE = 0,
- CONTIG_LEFT,
- CONTIG_RIGHT,
- CONTIG_LEFTRIGHT,
- };
- static enum ocfs2_contig_type
- ocfs2_extent_rec_contig(struct super_block *sb,
- struct ocfs2_extent_rec *ext,
- struct ocfs2_extent_rec *insert_rec);
- struct ocfs2_extent_tree_operations {
-
- void (*eo_set_last_eb_blk)(struct ocfs2_extent_tree *et,
- u64 blkno);
- u64 (*eo_get_last_eb_blk)(struct ocfs2_extent_tree *et);
-
- void (*eo_update_clusters)(struct ocfs2_extent_tree *et,
- u32 new_clusters);
-
- void (*eo_extent_map_insert)(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec);
-
- void (*eo_extent_map_truncate)(struct ocfs2_extent_tree *et,
- u32 clusters);
-
- int (*eo_insert_check)(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec);
- int (*eo_sanity_check)(struct ocfs2_extent_tree *et);
-
-
- void (*eo_fill_root_el)(struct ocfs2_extent_tree *et);
-
- void (*eo_fill_max_leaf_clusters)(struct ocfs2_extent_tree *et);
-
- enum ocfs2_contig_type
- (*eo_extent_contig)(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *ext,
- struct ocfs2_extent_rec *insert_rec);
- };
- static u64 ocfs2_dinode_get_last_eb_blk(struct ocfs2_extent_tree *et);
- static void ocfs2_dinode_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 blkno);
- static void ocfs2_dinode_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters);
- static void ocfs2_dinode_extent_map_insert(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec);
- static void ocfs2_dinode_extent_map_truncate(struct ocfs2_extent_tree *et,
- u32 clusters);
- static int ocfs2_dinode_insert_check(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec);
- static int ocfs2_dinode_sanity_check(struct ocfs2_extent_tree *et);
- static void ocfs2_dinode_fill_root_el(struct ocfs2_extent_tree *et);
- static const struct ocfs2_extent_tree_operations ocfs2_dinode_et_ops = {
- .eo_set_last_eb_blk = ocfs2_dinode_set_last_eb_blk,
- .eo_get_last_eb_blk = ocfs2_dinode_get_last_eb_blk,
- .eo_update_clusters = ocfs2_dinode_update_clusters,
- .eo_extent_map_insert = ocfs2_dinode_extent_map_insert,
- .eo_extent_map_truncate = ocfs2_dinode_extent_map_truncate,
- .eo_insert_check = ocfs2_dinode_insert_check,
- .eo_sanity_check = ocfs2_dinode_sanity_check,
- .eo_fill_root_el = ocfs2_dinode_fill_root_el,
- };
- static void ocfs2_dinode_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 blkno)
- {
- struct ocfs2_dinode *di = et->et_object;
- BUG_ON(et->et_ops != &ocfs2_dinode_et_ops);
- di->i_last_eb_blk = cpu_to_le64(blkno);
- }
- static u64 ocfs2_dinode_get_last_eb_blk(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_dinode *di = et->et_object;
- BUG_ON(et->et_ops != &ocfs2_dinode_et_ops);
- return le64_to_cpu(di->i_last_eb_blk);
- }
- static void ocfs2_dinode_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- struct ocfs2_inode_info *oi = cache_info_to_inode(et->et_ci);
- struct ocfs2_dinode *di = et->et_object;
- le32_add_cpu(&di->i_clusters, clusters);
- spin_lock(&oi->ip_lock);
- oi->ip_clusters = le32_to_cpu(di->i_clusters);
- spin_unlock(&oi->ip_lock);
- }
- static void ocfs2_dinode_extent_map_insert(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec)
- {
- struct inode *inode = &cache_info_to_inode(et->et_ci)->vfs_inode;
- ocfs2_extent_map_insert_rec(inode, rec);
- }
- static void ocfs2_dinode_extent_map_truncate(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- struct inode *inode = &cache_info_to_inode(et->et_ci)->vfs_inode;
- ocfs2_extent_map_trunc(inode, clusters);
- }
- static int ocfs2_dinode_insert_check(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec)
- {
- struct ocfs2_inode_info *oi = cache_info_to_inode(et->et_ci);
- struct ocfs2_super *osb = OCFS2_SB(oi->vfs_inode.i_sb);
- BUG_ON(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL);
- mlog_bug_on_msg(!ocfs2_sparse_alloc(osb) &&
- (oi->ip_clusters != le32_to_cpu(rec->e_cpos)),
- "Device %s, asking for sparse allocation: inode %llu, "
- "cpos %u, clusters %u\n",
- osb->dev_str,
- (unsigned long long)oi->ip_blkno,
- rec->e_cpos, oi->ip_clusters);
- return 0;
- }
- static int ocfs2_dinode_sanity_check(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_dinode *di = et->et_object;
- BUG_ON(et->et_ops != &ocfs2_dinode_et_ops);
- BUG_ON(!OCFS2_IS_VALID_DINODE(di));
- return 0;
- }
- static void ocfs2_dinode_fill_root_el(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_dinode *di = et->et_object;
- et->et_root_el = &di->id2.i_list;
- }
- static void ocfs2_xattr_value_fill_root_el(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_xattr_value_buf *vb = et->et_object;
- et->et_root_el = &vb->vb_xv->xr_list;
- }
- static void ocfs2_xattr_value_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 blkno)
- {
- struct ocfs2_xattr_value_buf *vb = et->et_object;
- vb->vb_xv->xr_last_eb_blk = cpu_to_le64(blkno);
- }
- static u64 ocfs2_xattr_value_get_last_eb_blk(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_xattr_value_buf *vb = et->et_object;
- return le64_to_cpu(vb->vb_xv->xr_last_eb_blk);
- }
- static void ocfs2_xattr_value_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- struct ocfs2_xattr_value_buf *vb = et->et_object;
- le32_add_cpu(&vb->vb_xv->xr_clusters, clusters);
- }
- static const struct ocfs2_extent_tree_operations ocfs2_xattr_value_et_ops = {
- .eo_set_last_eb_blk = ocfs2_xattr_value_set_last_eb_blk,
- .eo_get_last_eb_blk = ocfs2_xattr_value_get_last_eb_blk,
- .eo_update_clusters = ocfs2_xattr_value_update_clusters,
- .eo_fill_root_el = ocfs2_xattr_value_fill_root_el,
- };
- static void ocfs2_xattr_tree_fill_root_el(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_xattr_block *xb = et->et_object;
- et->et_root_el = &xb->xb_attrs.xb_root.xt_list;
- }
- static void ocfs2_xattr_tree_fill_max_leaf_clusters(struct ocfs2_extent_tree *et)
- {
- struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci);
- et->et_max_leaf_clusters =
- ocfs2_clusters_for_bytes(sb, OCFS2_MAX_XATTR_TREE_LEAF_SIZE);
- }
- static void ocfs2_xattr_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 blkno)
- {
- struct ocfs2_xattr_block *xb = et->et_object;
- struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
- xt->xt_last_eb_blk = cpu_to_le64(blkno);
- }
- static u64 ocfs2_xattr_tree_get_last_eb_blk(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_xattr_block *xb = et->et_object;
- struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
- return le64_to_cpu(xt->xt_last_eb_blk);
- }
- static void ocfs2_xattr_tree_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- struct ocfs2_xattr_block *xb = et->et_object;
- le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, clusters);
- }
- static const struct ocfs2_extent_tree_operations ocfs2_xattr_tree_et_ops = {
- .eo_set_last_eb_blk = ocfs2_xattr_tree_set_last_eb_blk,
- .eo_get_last_eb_blk = ocfs2_xattr_tree_get_last_eb_blk,
- .eo_update_clusters = ocfs2_xattr_tree_update_clusters,
- .eo_fill_root_el = ocfs2_xattr_tree_fill_root_el,
- .eo_fill_max_leaf_clusters = ocfs2_xattr_tree_fill_max_leaf_clusters,
- };
- static void ocfs2_dx_root_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 blkno)
- {
- struct ocfs2_dx_root_block *dx_root = et->et_object;
- dx_root->dr_last_eb_blk = cpu_to_le64(blkno);
- }
- static u64 ocfs2_dx_root_get_last_eb_blk(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_dx_root_block *dx_root = et->et_object;
- return le64_to_cpu(dx_root->dr_last_eb_blk);
- }
- static void ocfs2_dx_root_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- struct ocfs2_dx_root_block *dx_root = et->et_object;
- le32_add_cpu(&dx_root->dr_clusters, clusters);
- }
- static int ocfs2_dx_root_sanity_check(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_dx_root_block *dx_root = et->et_object;
- BUG_ON(!OCFS2_IS_VALID_DX_ROOT(dx_root));
- return 0;
- }
- static void ocfs2_dx_root_fill_root_el(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_dx_root_block *dx_root = et->et_object;
- et->et_root_el = &dx_root->dr_list;
- }
- static const struct ocfs2_extent_tree_operations ocfs2_dx_root_et_ops = {
- .eo_set_last_eb_blk = ocfs2_dx_root_set_last_eb_blk,
- .eo_get_last_eb_blk = ocfs2_dx_root_get_last_eb_blk,
- .eo_update_clusters = ocfs2_dx_root_update_clusters,
- .eo_sanity_check = ocfs2_dx_root_sanity_check,
- .eo_fill_root_el = ocfs2_dx_root_fill_root_el,
- };
- static void ocfs2_refcount_tree_fill_root_el(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_refcount_block *rb = et->et_object;
- et->et_root_el = &rb->rf_list;
- }
- static void ocfs2_refcount_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 blkno)
- {
- struct ocfs2_refcount_block *rb = et->et_object;
- rb->rf_last_eb_blk = cpu_to_le64(blkno);
- }
- static u64 ocfs2_refcount_tree_get_last_eb_blk(struct ocfs2_extent_tree *et)
- {
- struct ocfs2_refcount_block *rb = et->et_object;
- return le64_to_cpu(rb->rf_last_eb_blk);
- }
- static void ocfs2_refcount_tree_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- struct ocfs2_refcount_block *rb = et->et_object;
- le32_add_cpu(&rb->rf_clusters, clusters);
- }
- static enum ocfs2_contig_type
- ocfs2_refcount_tree_extent_contig(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *ext,
- struct ocfs2_extent_rec *insert_rec)
- {
- return CONTIG_NONE;
- }
- static const struct ocfs2_extent_tree_operations ocfs2_refcount_tree_et_ops = {
- .eo_set_last_eb_blk = ocfs2_refcount_tree_set_last_eb_blk,
- .eo_get_last_eb_blk = ocfs2_refcount_tree_get_last_eb_blk,
- .eo_update_clusters = ocfs2_refcount_tree_update_clusters,
- .eo_fill_root_el = ocfs2_refcount_tree_fill_root_el,
- .eo_extent_contig = ocfs2_refcount_tree_extent_contig,
- };
- static void __ocfs2_init_extent_tree(struct ocfs2_extent_tree *et,
- struct ocfs2_caching_info *ci,
- struct buffer_head *bh,
- ocfs2_journal_access_func access,
- void *obj,
- const struct ocfs2_extent_tree_operations *ops)
- {
- et->et_ops = ops;
- et->et_root_bh = bh;
- et->et_ci = ci;
- et->et_root_journal_access = access;
- if (!obj)
- obj = (void *)bh->b_data;
- et->et_object = obj;
- et->et_ops->eo_fill_root_el(et);
- if (!et->et_ops->eo_fill_max_leaf_clusters)
- et->et_max_leaf_clusters = 0;
- else
- et->et_ops->eo_fill_max_leaf_clusters(et);
- }
- void ocfs2_init_dinode_extent_tree(struct ocfs2_extent_tree *et,
- struct ocfs2_caching_info *ci,
- struct buffer_head *bh)
- {
- __ocfs2_init_extent_tree(et, ci, bh, ocfs2_journal_access_di,
- NULL, &ocfs2_dinode_et_ops);
- }
- void ocfs2_init_xattr_tree_extent_tree(struct ocfs2_extent_tree *et,
- struct ocfs2_caching_info *ci,
- struct buffer_head *bh)
- {
- __ocfs2_init_extent_tree(et, ci, bh, ocfs2_journal_access_xb,
- NULL, &ocfs2_xattr_tree_et_ops);
- }
- void ocfs2_init_xattr_value_extent_tree(struct ocfs2_extent_tree *et,
- struct ocfs2_caching_info *ci,
- struct ocfs2_xattr_value_buf *vb)
- {
- __ocfs2_init_extent_tree(et, ci, vb->vb_bh, vb->vb_access, vb,
- &ocfs2_xattr_value_et_ops);
- }
- void ocfs2_init_dx_root_extent_tree(struct ocfs2_extent_tree *et,
- struct ocfs2_caching_info *ci,
- struct buffer_head *bh)
- {
- __ocfs2_init_extent_tree(et, ci, bh, ocfs2_journal_access_dr,
- NULL, &ocfs2_dx_root_et_ops);
- }
- void ocfs2_init_refcount_extent_tree(struct ocfs2_extent_tree *et,
- struct ocfs2_caching_info *ci,
- struct buffer_head *bh)
- {
- __ocfs2_init_extent_tree(et, ci, bh, ocfs2_journal_access_rb,
- NULL, &ocfs2_refcount_tree_et_ops);
- }
- static inline void ocfs2_et_set_last_eb_blk(struct ocfs2_extent_tree *et,
- u64 new_last_eb_blk)
- {
- et->et_ops->eo_set_last_eb_blk(et, new_last_eb_blk);
- }
- static inline u64 ocfs2_et_get_last_eb_blk(struct ocfs2_extent_tree *et)
- {
- return et->et_ops->eo_get_last_eb_blk(et);
- }
- static inline void ocfs2_et_update_clusters(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- et->et_ops->eo_update_clusters(et, clusters);
- }
- static inline void ocfs2_et_extent_map_insert(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec)
- {
- if (et->et_ops->eo_extent_map_insert)
- et->et_ops->eo_extent_map_insert(et, rec);
- }
- static inline void ocfs2_et_extent_map_truncate(struct ocfs2_extent_tree *et,
- u32 clusters)
- {
- if (et->et_ops->eo_extent_map_truncate)
- et->et_ops->eo_extent_map_truncate(et, clusters);
- }
- static inline int ocfs2_et_root_journal_access(handle_t *handle,
- struct ocfs2_extent_tree *et,
- int type)
- {
- return et->et_root_journal_access(handle, et->et_ci, et->et_root_bh,
- type);
- }
- static inline enum ocfs2_contig_type
- ocfs2_et_extent_contig(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec,
- struct ocfs2_extent_rec *insert_rec)
- {
- if (et->et_ops->eo_extent_contig)
- return et->et_ops->eo_extent_contig(et, rec, insert_rec);
- return ocfs2_extent_rec_contig(
- ocfs2_metadata_cache_get_super(et->et_ci),
- rec, insert_rec);
- }
- static inline int ocfs2_et_insert_check(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *rec)
- {
- int ret = 0;
- if (et->et_ops->eo_insert_check)
- ret = et->et_ops->eo_insert_check(et, rec);
- return ret;
- }
- static inline int ocfs2_et_sanity_check(struct ocfs2_extent_tree *et)
- {
- int ret = 0;
- if (et->et_ops->eo_sanity_check)
- ret = et->et_ops->eo_sanity_check(et);
- return ret;
- }
- static int ocfs2_cache_extent_block_free(struct ocfs2_cached_dealloc_ctxt *ctxt,
- struct ocfs2_extent_block *eb);
- static void ocfs2_adjust_rightmost_records(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_extent_rec *insert_rec);
- void ocfs2_reinit_path(struct ocfs2_path *path, int keep_root)
- {
- int i, start = 0, depth = 0;
- struct ocfs2_path_item *node;
- if (keep_root)
- start = 1;
- for(i = start; i < path_num_items(path); i++) {
- node = &path->p_node[i];
- brelse(node->bh);
- node->bh = NULL;
- node->el = NULL;
- }
-
- if (keep_root)
- depth = le16_to_cpu(path_root_el(path)->l_tree_depth);
- else
- path_root_access(path) = NULL;
- path->p_tree_depth = depth;
- }
- void ocfs2_free_path(struct ocfs2_path *path)
- {
- if (path) {
- ocfs2_reinit_path(path, 0);
- kfree(path);
- }
- }
- static void ocfs2_cp_path(struct ocfs2_path *dest, struct ocfs2_path *src)
- {
- int i;
- BUG_ON(path_root_bh(dest) != path_root_bh(src));
- BUG_ON(path_root_el(dest) != path_root_el(src));
- BUG_ON(path_root_access(dest) != path_root_access(src));
- ocfs2_reinit_path(dest, 1);
- for(i = 1; i < OCFS2_MAX_PATH_DEPTH; i++) {
- dest->p_node[i].bh = src->p_node[i].bh;
- dest->p_node[i].el = src->p_node[i].el;
- if (dest->p_node[i].bh)
- get_bh(dest->p_node[i].bh);
- }
- }
- static void ocfs2_mv_path(struct ocfs2_path *dest, struct ocfs2_path *src)
- {
- int i;
- BUG_ON(path_root_bh(dest) != path_root_bh(src));
- BUG_ON(path_root_access(dest) != path_root_access(src));
- for(i = 1; i < OCFS2_MAX_PATH_DEPTH; i++) {
- brelse(dest->p_node[i].bh);
- dest->p_node[i].bh = src->p_node[i].bh;
- dest->p_node[i].el = src->p_node[i].el;
- src->p_node[i].bh = NULL;
- src->p_node[i].el = NULL;
- }
- }
- static inline void ocfs2_path_insert_eb(struct ocfs2_path *path, int index,
- struct buffer_head *eb_bh)
- {
- struct ocfs2_extent_block *eb = (struct ocfs2_extent_block *)eb_bh->b_data;
-
- BUG_ON(index == 0);
- path->p_node[index].bh = eb_bh;
- path->p_node[index].el = &eb->h_list;
- }
- static struct ocfs2_path *ocfs2_new_path(struct buffer_head *root_bh,
- struct ocfs2_extent_list *root_el,
- ocfs2_journal_access_func access)
- {
- struct ocfs2_path *path;
- BUG_ON(le16_to_cpu(root_el->l_tree_depth) >= OCFS2_MAX_PATH_DEPTH);
- path = kzalloc(sizeof(*path), GFP_NOFS);
- if (path) {
- path->p_tree_depth = le16_to_cpu(root_el->l_tree_depth);
- get_bh(root_bh);
- path_root_bh(path) = root_bh;
- path_root_el(path) = root_el;
- path_root_access(path) = access;
- }
- return path;
- }
- struct ocfs2_path *ocfs2_new_path_from_path(struct ocfs2_path *path)
- {
- return ocfs2_new_path(path_root_bh(path), path_root_el(path),
- path_root_access(path));
- }
- struct ocfs2_path *ocfs2_new_path_from_et(struct ocfs2_extent_tree *et)
- {
- return ocfs2_new_path(et->et_root_bh, et->et_root_el,
- et->et_root_journal_access);
- }
- int ocfs2_path_bh_journal_access(handle_t *handle,
- struct ocfs2_caching_info *ci,
- struct ocfs2_path *path,
- int idx)
- {
- ocfs2_journal_access_func access = path_root_access(path);
- if (!access)
- access = ocfs2_journal_access;
- if (idx)
- access = ocfs2_journal_access_eb;
- return access(handle, ci, path->p_node[idx].bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- }
- int ocfs2_journal_access_path(struct ocfs2_caching_info *ci,
- handle_t *handle,
- struct ocfs2_path *path)
- {
- int i, ret = 0;
- if (!path)
- goto out;
- for(i = 0; i < path_num_items(path); i++) {
- ret = ocfs2_path_bh_journal_access(handle, ci, path, i);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- }
- out:
- return ret;
- }
- int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster)
- {
- int ret = -1;
- int i;
- struct ocfs2_extent_rec *rec;
- u32 rec_end, rec_start, clusters;
- for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
- rec = &el->l_recs[i];
- rec_start = le32_to_cpu(rec->e_cpos);
- clusters = ocfs2_rec_clusters(el, rec);
- rec_end = rec_start + clusters;
- if (v_cluster >= rec_start && v_cluster < rec_end) {
- ret = i;
- break;
- }
- }
- return ret;
- }
- static int ocfs2_block_extent_contig(struct super_block *sb,
- struct ocfs2_extent_rec *ext,
- u64 blkno)
- {
- u64 blk_end = le64_to_cpu(ext->e_blkno);
- blk_end += ocfs2_clusters_to_blocks(sb,
- le16_to_cpu(ext->e_leaf_clusters));
- return blkno == blk_end;
- }
- static int ocfs2_extents_adjacent(struct ocfs2_extent_rec *left,
- struct ocfs2_extent_rec *right)
- {
- u32 left_range;
- left_range = le32_to_cpu(left->e_cpos) +
- le16_to_cpu(left->e_leaf_clusters);
- return (left_range == le32_to_cpu(right->e_cpos));
- }
- static enum ocfs2_contig_type
- ocfs2_extent_rec_contig(struct super_block *sb,
- struct ocfs2_extent_rec *ext,
- struct ocfs2_extent_rec *insert_rec)
- {
- u64 blkno = le64_to_cpu(insert_rec->e_blkno);
-
- if (ext->e_flags != insert_rec->e_flags)
- return CONTIG_NONE;
- if (ocfs2_extents_adjacent(ext, insert_rec) &&
- ocfs2_block_extent_contig(sb, ext, blkno))
- return CONTIG_RIGHT;
- blkno = le64_to_cpu(ext->e_blkno);
- if (ocfs2_extents_adjacent(insert_rec, ext) &&
- ocfs2_block_extent_contig(sb, insert_rec, blkno))
- return CONTIG_LEFT;
- return CONTIG_NONE;
- }
- enum ocfs2_append_type {
- APPEND_NONE = 0,
- APPEND_TAIL,
- };
- enum ocfs2_split_type {
- SPLIT_NONE = 0,
- SPLIT_LEFT,
- SPLIT_RIGHT,
- };
- struct ocfs2_insert_type {
- enum ocfs2_split_type ins_split;
- enum ocfs2_append_type ins_appending;
- enum ocfs2_contig_type ins_contig;
- int ins_contig_index;
- int ins_tree_depth;
- };
- struct ocfs2_merge_ctxt {
- enum ocfs2_contig_type c_contig_type;
- int c_has_empty_extent;
- int c_split_covers_rec;
- };
- static int ocfs2_validate_extent_block(struct super_block *sb,
- struct buffer_head *bh)
- {
- int rc;
- struct ocfs2_extent_block *eb =
- (struct ocfs2_extent_block *)bh->b_data;
- trace_ocfs2_validate_extent_block((unsigned long long)bh->b_blocknr);
- BUG_ON(!buffer_uptodate(bh));
-
- rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &eb->h_check);
- if (rc) {
- mlog(ML_ERROR, "Checksum failed for extent block %llu\n",
- (unsigned long long)bh->b_blocknr);
- return rc;
- }
-
- if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
- rc = ocfs2_error(sb,
- "Extent block #%llu has bad signature %.*s\n",
- (unsigned long long)bh->b_blocknr, 7,
- eb->h_signature);
- goto bail;
- }
- if (le64_to_cpu(eb->h_blkno) != bh->b_blocknr) {
- rc = ocfs2_error(sb,
- "Extent block #%llu has an invalid h_blkno of %llu\n",
- (unsigned long long)bh->b_blocknr,
- (unsigned long long)le64_to_cpu(eb->h_blkno));
- goto bail;
- }
- if (le32_to_cpu(eb->h_fs_generation) != OCFS2_SB(sb)->fs_generation) {
- rc = ocfs2_error(sb,
- "Extent block #%llu has an invalid h_fs_generation of #%u\n",
- (unsigned long long)bh->b_blocknr,
- le32_to_cpu(eb->h_fs_generation));
- goto bail;
- }
- bail:
- return rc;
- }
- int ocfs2_read_extent_block(struct ocfs2_caching_info *ci, u64 eb_blkno,
- struct buffer_head **bh)
- {
- int rc;
- struct buffer_head *tmp = *bh;
- rc = ocfs2_read_block(ci, eb_blkno, &tmp,
- ocfs2_validate_extent_block);
-
- if (!rc && !*bh)
- *bh = tmp;
- return rc;
- }
- int ocfs2_num_free_extents(struct ocfs2_super *osb,
- struct ocfs2_extent_tree *et)
- {
- int retval;
- struct ocfs2_extent_list *el = NULL;
- struct ocfs2_extent_block *eb;
- struct buffer_head *eb_bh = NULL;
- u64 last_eb_blk = 0;
- el = et->et_root_el;
- last_eb_blk = ocfs2_et_get_last_eb_blk(et);
- if (last_eb_blk) {
- retval = ocfs2_read_extent_block(et->et_ci, last_eb_blk,
- &eb_bh);
- if (retval < 0) {
- mlog_errno(retval);
- goto bail;
- }
- eb = (struct ocfs2_extent_block *) eb_bh->b_data;
- el = &eb->h_list;
- }
- BUG_ON(el->l_tree_depth != 0);
- retval = le16_to_cpu(el->l_count) - le16_to_cpu(el->l_next_free_rec);
- bail:
- brelse(eb_bh);
- trace_ocfs2_num_free_extents(retval);
- return retval;
- }
- static int ocfs2_create_new_meta_bhs(handle_t *handle,
- struct ocfs2_extent_tree *et,
- int wanted,
- struct ocfs2_alloc_context *meta_ac,
- struct buffer_head *bhs[])
- {
- int count, status, i;
- u16 suballoc_bit_start;
- u32 num_got;
- u64 suballoc_loc, first_blkno;
- struct ocfs2_super *osb =
- OCFS2_SB(ocfs2_metadata_cache_get_super(et->et_ci));
- struct ocfs2_extent_block *eb;
- count = 0;
- while (count < wanted) {
- status = ocfs2_claim_metadata(handle,
- meta_ac,
- wanted - count,
- &suballoc_loc,
- &suballoc_bit_start,
- &num_got,
- &first_blkno);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- for(i = count; i < (num_got + count); i++) {
- bhs[i] = sb_getblk(osb->sb, first_blkno);
- if (bhs[i] == NULL) {
- status = -ENOMEM;
- mlog_errno(status);
- goto bail;
- }
- ocfs2_set_new_buffer_uptodate(et->et_ci, bhs[i]);
- status = ocfs2_journal_access_eb(handle, et->et_ci,
- bhs[i],
- OCFS2_JOURNAL_ACCESS_CREATE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- memset(bhs[i]->b_data, 0, osb->sb->s_blocksize);
- eb = (struct ocfs2_extent_block *) bhs[i]->b_data;
-
- strcpy(eb->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE);
- eb->h_blkno = cpu_to_le64(first_blkno);
- eb->h_fs_generation = cpu_to_le32(osb->fs_generation);
- eb->h_suballoc_slot =
- cpu_to_le16(meta_ac->ac_alloc_slot);
- eb->h_suballoc_loc = cpu_to_le64(suballoc_loc);
- eb->h_suballoc_bit = cpu_to_le16(suballoc_bit_start);
- eb->h_list.l_count =
- cpu_to_le16(ocfs2_extent_recs_per_eb(osb->sb));
- suballoc_bit_start++;
- first_blkno++;
-
- ocfs2_journal_dirty(handle, bhs[i]);
- }
- count += num_got;
- }
- status = 0;
- bail:
- if (status < 0) {
- for(i = 0; i < wanted; i++) {
- brelse(bhs[i]);
- bhs[i] = NULL;
- }
- mlog_errno(status);
- }
- return status;
- }
- static inline u32 ocfs2_sum_rightmost_rec(struct ocfs2_extent_list *el)
- {
- int i;
- i = le16_to_cpu(el->l_next_free_rec) - 1;
- return le32_to_cpu(el->l_recs[i].e_cpos) +
- ocfs2_rec_clusters(el, &el->l_recs[i]);
- }
- static int ocfs2_adjust_rightmost_branch(handle_t *handle,
- struct ocfs2_extent_tree *et)
- {
- int status;
- struct ocfs2_path *path = NULL;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_rec *rec;
- path = ocfs2_new_path_from_et(et);
- if (!path) {
- status = -ENOMEM;
- return status;
- }
- status = ocfs2_find_path(et->et_ci, path, UINT_MAX);
- if (status < 0) {
- mlog_errno(status);
- goto out;
- }
- status = ocfs2_extend_trans(handle, path_num_items(path));
- if (status < 0) {
- mlog_errno(status);
- goto out;
- }
- status = ocfs2_journal_access_path(et->et_ci, handle, path);
- if (status < 0) {
- mlog_errno(status);
- goto out;
- }
- el = path_leaf_el(path);
- rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec) - 1];
- ocfs2_adjust_rightmost_records(handle, et, path, rec);
- out:
- ocfs2_free_path(path);
- return status;
- }
- static int ocfs2_add_branch(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct buffer_head *eb_bh,
- struct buffer_head **last_eb_bh,
- struct ocfs2_alloc_context *meta_ac)
- {
- int status, new_blocks, i;
- u64 next_blkno, new_last_eb_blk;
- struct buffer_head *bh;
- struct buffer_head **new_eb_bhs = NULL;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *eb_el;
- struct ocfs2_extent_list *el;
- u32 new_cpos, root_end;
- BUG_ON(!last_eb_bh || !*last_eb_bh);
- if (eb_bh) {
- eb = (struct ocfs2_extent_block *) eb_bh->b_data;
- el = &eb->h_list;
- } else
- el = et->et_root_el;
-
- BUG_ON(!el->l_tree_depth);
- new_blocks = le16_to_cpu(el->l_tree_depth);
- eb = (struct ocfs2_extent_block *)(*last_eb_bh)->b_data;
- new_cpos = ocfs2_sum_rightmost_rec(&eb->h_list);
- root_end = ocfs2_sum_rightmost_rec(et->et_root_el);
-
- if (root_end > new_cpos) {
- trace_ocfs2_adjust_rightmost_branch(
- (unsigned long long)
- ocfs2_metadata_cache_owner(et->et_ci),
- root_end, new_cpos);
- status = ocfs2_adjust_rightmost_branch(handle, et);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
- }
-
- new_eb_bhs = kcalloc(new_blocks, sizeof(struct buffer_head *),
- GFP_KERNEL);
- if (!new_eb_bhs) {
- status = -ENOMEM;
- mlog_errno(status);
- goto bail;
- }
- status = ocfs2_create_new_meta_bhs(handle, et, new_blocks,
- meta_ac, new_eb_bhs);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
-
- next_blkno = new_last_eb_blk = 0;
- for(i = 0; i < new_blocks; i++) {
- bh = new_eb_bhs[i];
- eb = (struct ocfs2_extent_block *) bh->b_data;
-
- BUG_ON(!OCFS2_IS_VALID_EXTENT_BLOCK(eb));
- eb_el = &eb->h_list;
- status = ocfs2_journal_access_eb(handle, et->et_ci, bh,
- OCFS2_JOURNAL_ACCESS_CREATE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- eb->h_next_leaf_blk = 0;
- eb_el->l_tree_depth = cpu_to_le16(i);
- eb_el->l_next_free_rec = cpu_to_le16(1);
-
- eb_el->l_recs[0].e_cpos = cpu_to_le32(new_cpos);
- eb_el->l_recs[0].e_blkno = cpu_to_le64(next_blkno);
-
- eb_el->l_recs[0].e_int_clusters = cpu_to_le32(0);
- if (!eb_el->l_tree_depth)
- new_last_eb_blk = le64_to_cpu(eb->h_blkno);
- ocfs2_journal_dirty(handle, bh);
- next_blkno = le64_to_cpu(eb->h_blkno);
- }
-
- status = ocfs2_journal_access_eb(handle, et->et_ci, *last_eb_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- status = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- if (eb_bh) {
- status = ocfs2_journal_access_eb(handle, et->et_ci, eb_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- }
-
- i = le16_to_cpu(el->l_next_free_rec);
- el->l_recs[i].e_blkno = cpu_to_le64(next_blkno);
- el->l_recs[i].e_cpos = cpu_to_le32(new_cpos);
- el->l_recs[i].e_int_clusters = 0;
- le16_add_cpu(&el->l_next_free_rec, 1);
-
- ocfs2_et_set_last_eb_blk(et, new_last_eb_blk);
- eb = (struct ocfs2_extent_block *) (*last_eb_bh)->b_data;
- eb->h_next_leaf_blk = cpu_to_le64(new_last_eb_blk);
- ocfs2_journal_dirty(handle, *last_eb_bh);
- ocfs2_journal_dirty(handle, et->et_root_bh);
- if (eb_bh)
- ocfs2_journal_dirty(handle, eb_bh);
-
- brelse(*last_eb_bh);
- get_bh(new_eb_bhs[0]);
- *last_eb_bh = new_eb_bhs[0];
- status = 0;
- bail:
- if (new_eb_bhs) {
- for (i = 0; i < new_blocks; i++)
- brelse(new_eb_bhs[i]);
- kfree(new_eb_bhs);
- }
- return status;
- }
- static int ocfs2_shift_tree_depth(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_alloc_context *meta_ac,
- struct buffer_head **ret_new_eb_bh)
- {
- int status, i;
- u32 new_clusters;
- struct buffer_head *new_eb_bh = NULL;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *root_el;
- struct ocfs2_extent_list *eb_el;
- status = ocfs2_create_new_meta_bhs(handle, et, 1, meta_ac,
- &new_eb_bh);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- eb = (struct ocfs2_extent_block *) new_eb_bh->b_data;
-
- BUG_ON(!OCFS2_IS_VALID_EXTENT_BLOCK(eb));
- eb_el = &eb->h_list;
- root_el = et->et_root_el;
- status = ocfs2_journal_access_eb(handle, et->et_ci, new_eb_bh,
- OCFS2_JOURNAL_ACCESS_CREATE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
-
- eb_el->l_tree_depth = root_el->l_tree_depth;
- eb_el->l_next_free_rec = root_el->l_next_free_rec;
- for (i = 0; i < le16_to_cpu(root_el->l_next_free_rec); i++)
- eb_el->l_recs[i] = root_el->l_recs[i];
- ocfs2_journal_dirty(handle, new_eb_bh);
- status = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- new_clusters = ocfs2_sum_rightmost_rec(eb_el);
-
- le16_add_cpu(&root_el->l_tree_depth, 1);
- root_el->l_recs[0].e_cpos = 0;
- root_el->l_recs[0].e_blkno = eb->h_blkno;
- root_el->l_recs[0].e_int_clusters = cpu_to_le32(new_clusters);
- for (i = 1; i < le16_to_cpu(root_el->l_next_free_rec); i++)
- memset(&root_el->l_recs[i], 0, sizeof(struct ocfs2_extent_rec));
- root_el->l_next_free_rec = cpu_to_le16(1);
-
- if (root_el->l_tree_depth == cpu_to_le16(1))
- ocfs2_et_set_last_eb_blk(et, le64_to_cpu(eb->h_blkno));
- ocfs2_journal_dirty(handle, et->et_root_bh);
- *ret_new_eb_bh = new_eb_bh;
- new_eb_bh = NULL;
- status = 0;
- bail:
- brelse(new_eb_bh);
- return status;
- }
- static int ocfs2_find_branch_target(struct ocfs2_extent_tree *et,
- struct buffer_head **target_bh)
- {
- int status = 0, i;
- u64 blkno;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *el;
- struct buffer_head *bh = NULL;
- struct buffer_head *lowest_bh = NULL;
- *target_bh = NULL;
- el = et->et_root_el;
- while(le16_to_cpu(el->l_tree_depth) > 1) {
- if (le16_to_cpu(el->l_next_free_rec) == 0) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu has empty extent list (next_free_rec == 0)\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci));
- status = -EIO;
- goto bail;
- }
- i = le16_to_cpu(el->l_next_free_rec) - 1;
- blkno = le64_to_cpu(el->l_recs[i].e_blkno);
- if (!blkno) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu has extent list where extent # %d has no physical block start\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci), i);
- status = -EIO;
- goto bail;
- }
- brelse(bh);
- bh = NULL;
- status = ocfs2_read_extent_block(et->et_ci, blkno, &bh);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- eb = (struct ocfs2_extent_block *) bh->b_data;
- el = &eb->h_list;
- if (le16_to_cpu(el->l_next_free_rec) <
- le16_to_cpu(el->l_count)) {
- brelse(lowest_bh);
- lowest_bh = bh;
- get_bh(lowest_bh);
- }
- }
-
- el = et->et_root_el;
- if (!lowest_bh && (el->l_next_free_rec == el->l_count))
- status = 1;
- *target_bh = lowest_bh;
- bail:
- brelse(bh);
- return status;
- }
- static int ocfs2_grow_tree(handle_t *handle, struct ocfs2_extent_tree *et,
- int *final_depth, struct buffer_head **last_eb_bh,
- struct ocfs2_alloc_context *meta_ac)
- {
- int ret, shift;
- struct ocfs2_extent_list *el = et->et_root_el;
- int depth = le16_to_cpu(el->l_tree_depth);
- struct buffer_head *bh = NULL;
- BUG_ON(meta_ac == NULL);
- shift = ocfs2_find_branch_target(et, &bh);
- if (shift < 0) {
- ret = shift;
- mlog_errno(ret);
- goto out;
- }
-
- if (shift) {
- BUG_ON(bh);
- trace_ocfs2_grow_tree(
- (unsigned long long)
- ocfs2_metadata_cache_owner(et->et_ci),
- depth);
-
- ret = ocfs2_shift_tree_depth(handle, et, meta_ac, &bh);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- depth++;
- if (depth == 1) {
-
- BUG_ON(*last_eb_bh);
- get_bh(bh);
- *last_eb_bh = bh;
- goto out;
- }
- }
-
- ret = ocfs2_add_branch(handle, et, bh, last_eb_bh,
- meta_ac);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- out:
- if (final_depth)
- *final_depth = depth;
- brelse(bh);
- return ret;
- }
- static void ocfs2_shift_records_right(struct ocfs2_extent_list *el)
- {
- int next_free = le16_to_cpu(el->l_next_free_rec);
- int count = le16_to_cpu(el->l_count);
- unsigned int num_bytes;
- BUG_ON(!next_free);
-
- BUG_ON(next_free >= count);
- num_bytes = sizeof(struct ocfs2_extent_rec) * next_free;
- memmove(&el->l_recs[1], &el->l_recs[0], num_bytes);
- }
- static void ocfs2_rotate_leaf(struct ocfs2_extent_list *el,
- struct ocfs2_extent_rec *insert_rec)
- {
- int i, insert_index, next_free, has_empty, num_bytes;
- u32 insert_cpos = le32_to_cpu(insert_rec->e_cpos);
- struct ocfs2_extent_rec *rec;
- next_free = le16_to_cpu(el->l_next_free_rec);
- has_empty = ocfs2_is_empty_extent(&el->l_recs[0]);
- BUG_ON(!next_free);
-
- BUG_ON(el->l_next_free_rec == el->l_count && !has_empty);
-
- if (has_empty) {
-
- for(i = 0; i < (next_free - 1); i++)
- el->l_recs[i] = el->l_recs[i+1];
- next_free--;
- }
-
- for(i = 0; i < next_free; i++) {
- rec = &el->l_recs[i];
- if (insert_cpos < le32_to_cpu(rec->e_cpos))
- break;
- }
- insert_index = i;
- trace_ocfs2_rotate_leaf(insert_cpos, insert_index,
- has_empty, next_free,
- le16_to_cpu(el->l_count));
- BUG_ON(insert_index < 0);
- BUG_ON(insert_index >= le16_to_cpu(el->l_count));
- BUG_ON(insert_index > next_free);
-
- if (insert_index != next_free) {
- BUG_ON(next_free >= le16_to_cpu(el->l_count));
- num_bytes = next_free - insert_index;
- num_bytes *= sizeof(struct ocfs2_extent_rec);
- memmove(&el->l_recs[insert_index + 1],
- &el->l_recs[insert_index],
- num_bytes);
- }
-
- next_free++;
- el->l_next_free_rec = cpu_to_le16(next_free);
-
- BUG_ON(le16_to_cpu(el->l_next_free_rec) > le16_to_cpu(el->l_count));
- el->l_recs[insert_index] = *insert_rec;
- }
- static void ocfs2_remove_empty_extent(struct ocfs2_extent_list *el)
- {
- int size, num_recs = le16_to_cpu(el->l_next_free_rec);
- BUG_ON(num_recs == 0);
- if (ocfs2_is_empty_extent(&el->l_recs[0])) {
- num_recs--;
- size = num_recs * sizeof(struct ocfs2_extent_rec);
- memmove(&el->l_recs[0], &el->l_recs[1], size);
- memset(&el->l_recs[num_recs], 0,
- sizeof(struct ocfs2_extent_rec));
- el->l_next_free_rec = cpu_to_le16(num_recs);
- }
- }
- static void ocfs2_create_empty_extent(struct ocfs2_extent_list *el)
- {
- int next_free = le16_to_cpu(el->l_next_free_rec);
- BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
- if (next_free == 0)
- goto set_and_inc;
- if (ocfs2_is_empty_extent(&el->l_recs[0]))
- return;
- mlog_bug_on_msg(el->l_count == el->l_next_free_rec,
- "Asked to create an empty extent in a full list:\n"
- "count = %u, tree depth = %u",
- le16_to_cpu(el->l_count),
- le16_to_cpu(el->l_tree_depth));
- ocfs2_shift_records_right(el);
- set_and_inc:
- le16_add_cpu(&el->l_next_free_rec, 1);
- memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
- }
- int ocfs2_find_subtree_root(struct ocfs2_extent_tree *et,
- struct ocfs2_path *left,
- struct ocfs2_path *right)
- {
- int i = 0;
-
- BUG_ON(path_root_bh(left) != path_root_bh(right));
- do {
- i++;
-
- mlog_bug_on_msg(i > left->p_tree_depth,
- "Owner %llu, left depth %u, right depth %u\n"
- "left leaf blk %llu, right leaf blk %llu\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- left->p_tree_depth, right->p_tree_depth,
- (unsigned long long)path_leaf_bh(left)->b_blocknr,
- (unsigned long long)path_leaf_bh(right)->b_blocknr);
- } while (left->p_node[i].bh->b_blocknr ==
- right->p_node[i].bh->b_blocknr);
- return i - 1;
- }
- typedef void (path_insert_t)(void *, struct buffer_head *);
- static int __ocfs2_find_path(struct ocfs2_caching_info *ci,
- struct ocfs2_extent_list *root_el, u32 cpos,
- path_insert_t *func, void *data)
- {
- int i, ret = 0;
- u32 range;
- u64 blkno;
- struct buffer_head *bh = NULL;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_rec *rec;
- el = root_el;
- while (el->l_tree_depth) {
- if (le16_to_cpu(el->l_next_free_rec) == 0) {
- ocfs2_error(ocfs2_metadata_cache_get_super(ci),
- "Owner %llu has empty extent list at depth %u\n",
- (unsigned long long)ocfs2_metadata_cache_owner(ci),
- le16_to_cpu(el->l_tree_depth));
- ret = -EROFS;
- goto out;
- }
- for(i = 0; i < le16_to_cpu(el->l_next_free_rec) - 1; i++) {
- rec = &el->l_recs[i];
-
- range = le32_to_cpu(rec->e_cpos) +
- ocfs2_rec_clusters(el, rec);
- if (cpos >= le32_to_cpu(rec->e_cpos) && cpos < range)
- break;
- }
- blkno = le64_to_cpu(el->l_recs[i].e_blkno);
- if (blkno == 0) {
- ocfs2_error(ocfs2_metadata_cache_get_super(ci),
- "Owner %llu has bad blkno in extent list at depth %u (index %d)\n",
- (unsigned long long)ocfs2_metadata_cache_owner(ci),
- le16_to_cpu(el->l_tree_depth), i);
- ret = -EROFS;
- goto out;
- }
- brelse(bh);
- bh = NULL;
- ret = ocfs2_read_extent_block(ci, blkno, &bh);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- eb = (struct ocfs2_extent_block *) bh->b_data;
- el = &eb->h_list;
- if (le16_to_cpu(el->l_next_free_rec) >
- le16_to_cpu(el->l_count)) {
- ocfs2_error(ocfs2_metadata_cache_get_super(ci),
- "Owner %llu has bad count in extent list at block %llu (next free=%u, count=%u)\n",
- (unsigned long long)ocfs2_metadata_cache_owner(ci),
- (unsigned long long)bh->b_blocknr,
- le16_to_cpu(el->l_next_free_rec),
- le16_to_cpu(el->l_count));
- ret = -EROFS;
- goto out;
- }
- if (func)
- func(data, bh);
- }
- out:
-
- brelse(bh);
- return ret;
- }
- struct find_path_data {
- int index;
- struct ocfs2_path *path;
- };
- static void find_path_ins(void *data, struct buffer_head *bh)
- {
- struct find_path_data *fp = data;
- get_bh(bh);
- ocfs2_path_insert_eb(fp->path, fp->index, bh);
- fp->index++;
- }
- int ocfs2_find_path(struct ocfs2_caching_info *ci,
- struct ocfs2_path *path, u32 cpos)
- {
- struct find_path_data data;
- data.index = 1;
- data.path = path;
- return __ocfs2_find_path(ci, path_root_el(path), cpos,
- find_path_ins, &data);
- }
- static void find_leaf_ins(void *data, struct buffer_head *bh)
- {
- struct ocfs2_extent_block *eb =(struct ocfs2_extent_block *)bh->b_data;
- struct ocfs2_extent_list *el = &eb->h_list;
- struct buffer_head **ret = data;
-
- if (le16_to_cpu(el->l_tree_depth) == 0) {
- get_bh(bh);
- *ret = bh;
- }
- }
- int ocfs2_find_leaf(struct ocfs2_caching_info *ci,
- struct ocfs2_extent_list *root_el, u32 cpos,
- struct buffer_head **leaf_bh)
- {
- int ret;
- struct buffer_head *bh = NULL;
- ret = __ocfs2_find_path(ci, root_el, cpos, find_leaf_ins, &bh);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- *leaf_bh = bh;
- out:
- return ret;
- }
- static void ocfs2_adjust_adjacent_records(struct ocfs2_extent_rec *left_rec,
- struct ocfs2_extent_list *left_child_el,
- struct ocfs2_extent_rec *right_rec,
- struct ocfs2_extent_list *right_child_el)
- {
- u32 left_clusters, right_end;
-
- left_clusters = le32_to_cpu(right_child_el->l_recs[0].e_cpos);
- if (!ocfs2_rec_clusters(right_child_el, &right_child_el->l_recs[0])) {
- BUG_ON(right_child_el->l_tree_depth);
- BUG_ON(le16_to_cpu(right_child_el->l_next_free_rec) <= 1);
- left_clusters = le32_to_cpu(right_child_el->l_recs[1].e_cpos);
- }
- left_clusters -= le32_to_cpu(left_rec->e_cpos);
- left_rec->e_int_clusters = cpu_to_le32(left_clusters);
-
- right_end = le32_to_cpu(right_rec->e_cpos);
- right_end += le32_to_cpu(right_rec->e_int_clusters);
- right_rec->e_cpos = left_rec->e_cpos;
- le32_add_cpu(&right_rec->e_cpos, left_clusters);
- right_end -= le32_to_cpu(right_rec->e_cpos);
- right_rec->e_int_clusters = cpu_to_le32(right_end);
- }
- static void ocfs2_adjust_root_records(struct ocfs2_extent_list *root_el,
- struct ocfs2_extent_list *left_el,
- struct ocfs2_extent_list *right_el,
- u64 left_el_blkno)
- {
- int i;
- BUG_ON(le16_to_cpu(root_el->l_tree_depth) <=
- le16_to_cpu(left_el->l_tree_depth));
- for(i = 0; i < le16_to_cpu(root_el->l_next_free_rec) - 1; i++) {
- if (le64_to_cpu(root_el->l_recs[i].e_blkno) == left_el_blkno)
- break;
- }
-
- BUG_ON(i >= (le16_to_cpu(root_el->l_next_free_rec) - 1));
- ocfs2_adjust_adjacent_records(&root_el->l_recs[i], left_el,
- &root_el->l_recs[i + 1], right_el);
- }
- static void ocfs2_complete_edge_insert(handle_t *handle,
- struct ocfs2_path *left_path,
- struct ocfs2_path *right_path,
- int subtree_index)
- {
- int i, idx;
- struct ocfs2_extent_list *el, *left_el, *right_el;
- struct ocfs2_extent_rec *left_rec, *right_rec;
- struct buffer_head *root_bh = left_path->p_node[subtree_index].bh;
-
- left_el = path_leaf_el(left_path);
- right_el = path_leaf_el(right_path);
- for(i = left_path->p_tree_depth - 1; i > subtree_index; i--) {
- trace_ocfs2_complete_edge_insert(i);
-
- el = left_path->p_node[i].el;
- idx = le16_to_cpu(left_el->l_next_free_rec) - 1;
- left_rec = &el->l_recs[idx];
- el = right_path->p_node[i].el;
- right_rec = &el->l_recs[0];
- ocfs2_adjust_adjacent_records(left_rec, left_el, right_rec,
- right_el);
- ocfs2_journal_dirty(handle, left_path->p_node[i].bh);
- ocfs2_journal_dirty(handle, right_path->p_node[i].bh);
-
- left_el = left_path->p_node[i].el;
- right_el = right_path->p_node[i].el;
- }
-
- el = left_path->p_node[subtree_index].el;
- left_el = left_path->p_node[subtree_index + 1].el;
- right_el = right_path->p_node[subtree_index + 1].el;
- ocfs2_adjust_root_records(el, left_el, right_el,
- left_path->p_node[subtree_index + 1].bh->b_blocknr);
- root_bh = left_path->p_node[subtree_index].bh;
- ocfs2_journal_dirty(handle, root_bh);
- }
- static int ocfs2_rotate_subtree_right(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *left_path,
- struct ocfs2_path *right_path,
- int subtree_index)
- {
- int ret, i;
- struct buffer_head *right_leaf_bh;
- struct buffer_head *left_leaf_bh = NULL;
- struct buffer_head *root_bh;
- struct ocfs2_extent_list *right_el, *left_el;
- struct ocfs2_extent_rec move_rec;
- left_leaf_bh = path_leaf_bh(left_path);
- left_el = path_leaf_el(left_path);
- if (left_el->l_next_free_rec != left_el->l_count) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Inode %llu has non-full interior leaf node %llu (next free = %u)\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- (unsigned long long)left_leaf_bh->b_blocknr,
- le16_to_cpu(left_el->l_next_free_rec));
- return -EROFS;
- }
-
- if (ocfs2_is_empty_extent(&left_el->l_recs[0]))
- return 0;
- root_bh = left_path->p_node[subtree_index].bh;
- BUG_ON(root_bh != right_path->p_node[subtree_index].bh);
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, right_path,
- subtree_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- for(i = subtree_index + 1; i < path_num_items(right_path); i++) {
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- right_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- left_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- right_leaf_bh = path_leaf_bh(right_path);
- right_el = path_leaf_el(right_path);
-
- mlog_bug_on_msg(!right_el->l_next_free_rec, "Inode %llu: Rotate fails "
- "because rightmost leaf block %llu is empty\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- (unsigned long long)right_leaf_bh->b_blocknr);
- ocfs2_create_empty_extent(right_el);
- ocfs2_journal_dirty(handle, right_leaf_bh);
-
- i = le16_to_cpu(left_el->l_next_free_rec) - 1;
- move_rec = left_el->l_recs[i];
- right_el->l_recs[0] = move_rec;
-
- le16_add_cpu(&left_el->l_next_free_rec, -1);
- ocfs2_shift_records_right(left_el);
- memset(&left_el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
- le16_add_cpu(&left_el->l_next_free_rec, 1);
- ocfs2_journal_dirty(handle, left_leaf_bh);
- ocfs2_complete_edge_insert(handle, left_path, right_path,
- subtree_index);
- out:
- return ret;
- }
- int ocfs2_find_cpos_for_left_leaf(struct super_block *sb,
- struct ocfs2_path *path, u32 *cpos)
- {
- int i, j, ret = 0;
- u64 blkno;
- struct ocfs2_extent_list *el;
- BUG_ON(path->p_tree_depth == 0);
- *cpos = 0;
- blkno = path_leaf_bh(path)->b_blocknr;
-
- i = path->p_tree_depth - 1;
- while (i >= 0) {
- el = path->p_node[i].el;
-
- for(j = 0; j < le16_to_cpu(el->l_next_free_rec); j++) {
- if (le64_to_cpu(el->l_recs[j].e_blkno) == blkno) {
- if (j == 0) {
- if (i == 0) {
-
- goto out;
- }
-
- goto next_node;
- }
- *cpos = le32_to_cpu(el->l_recs[j - 1].e_cpos);
- *cpos = *cpos + ocfs2_rec_clusters(el,
- &el->l_recs[j - 1]);
- *cpos = *cpos - 1;
- goto out;
- }
- }
-
- ocfs2_error(sb, "Invalid extent tree at extent block %llu\n",
- (unsigned long long)blkno);
- ret = -EROFS;
- goto out;
- next_node:
- blkno = path->p_node[i].bh->b_blocknr;
- i--;
- }
- out:
- return ret;
- }
- static int ocfs2_extend_rotate_transaction(handle_t *handle, int subtree_depth,
- int op_credits,
- struct ocfs2_path *path)
- {
- int ret = 0;
- int credits = (path->p_tree_depth - subtree_depth) * 2 + 1 + op_credits;
- if (handle->h_buffer_credits < credits)
- ret = ocfs2_extend_trans(handle,
- credits - handle->h_buffer_credits);
- return ret;
- }
- static int ocfs2_rotate_requires_path_adjustment(struct ocfs2_path *left_path,
- u32 insert_cpos)
- {
- struct ocfs2_extent_list *left_el;
- struct ocfs2_extent_rec *rec;
- int next_free;
- left_el = path_leaf_el(left_path);
- next_free = le16_to_cpu(left_el->l_next_free_rec);
- rec = &left_el->l_recs[next_free - 1];
- if (insert_cpos > le32_to_cpu(rec->e_cpos))
- return 1;
- return 0;
- }
- static int ocfs2_leftmost_rec_contains(struct ocfs2_extent_list *el, u32 cpos)
- {
- int next_free = le16_to_cpu(el->l_next_free_rec);
- unsigned int range;
- struct ocfs2_extent_rec *rec;
- if (next_free == 0)
- return 0;
- rec = &el->l_recs[0];
- if (ocfs2_is_empty_extent(rec)) {
-
- if (next_free == 1)
- return 0;
- rec = &el->l_recs[1];
- }
- range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
- if (cpos >= le32_to_cpu(rec->e_cpos) && cpos < range)
- return 1;
- return 0;
- }
- static int ocfs2_rotate_tree_right(handle_t *handle,
- struct ocfs2_extent_tree *et,
- enum ocfs2_split_type split,
- u32 insert_cpos,
- struct ocfs2_path *right_path,
- struct ocfs2_path **ret_left_path)
- {
- int ret, start, orig_credits = handle->h_buffer_credits;
- u32 cpos;
- struct ocfs2_path *left_path = NULL;
- struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci);
- *ret_left_path = NULL;
- left_path = ocfs2_new_path_from_path(right_path);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_cpos_for_left_leaf(sb, right_path, &cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- trace_ocfs2_rotate_tree_right(
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- insert_cpos, cpos);
-
- while (cpos && insert_cpos <= cpos) {
- trace_ocfs2_rotate_tree_right(
- (unsigned long long)
- ocfs2_metadata_cache_owner(et->et_ci),
- insert_cpos, cpos);
- ret = ocfs2_find_path(et->et_ci, left_path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- mlog_bug_on_msg(path_leaf_bh(left_path) ==
- path_leaf_bh(right_path),
- "Owner %llu: error during insert of %u "
- "(left path cpos %u) results in two identical "
- "paths ending at %llu\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- insert_cpos, cpos,
- (unsigned long long)
- path_leaf_bh(left_path)->b_blocknr);
- if (split == SPLIT_NONE &&
- ocfs2_rotate_requires_path_adjustment(left_path,
- insert_cpos)) {
-
- *ret_left_path = left_path;
- goto out_ret_path;
- }
- start = ocfs2_find_subtree_root(et, left_path, right_path);
- trace_ocfs2_rotate_subtree(start,
- (unsigned long long)
- right_path->p_node[start].bh->b_blocknr,
- right_path->p_tree_depth);
- ret = ocfs2_extend_rotate_transaction(handle, start,
- orig_credits, right_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_rotate_subtree_right(handle, et, left_path,
- right_path, start);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- if (split != SPLIT_NONE &&
- ocfs2_leftmost_rec_contains(path_leaf_el(right_path),
- insert_cpos)) {
-
- *ret_left_path = left_path;
- goto out_ret_path;
- }
-
- ocfs2_mv_path(right_path, left_path);
- ret = ocfs2_find_cpos_for_left_leaf(sb, right_path, &cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- out:
- ocfs2_free_path(left_path);
- out_ret_path:
- return ret;
- }
- static int ocfs2_update_edge_lengths(handle_t *handle,
- struct ocfs2_extent_tree *et,
- int subtree_index, struct ocfs2_path *path)
- {
- int i, idx, ret;
- struct ocfs2_extent_rec *rec;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_block *eb;
- u32 range;
- ret = ocfs2_journal_access_path(et->et_ci, handle, path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
- BUG_ON(eb->h_next_leaf_blk != 0ULL);
- el = &eb->h_list;
- BUG_ON(le16_to_cpu(el->l_next_free_rec) == 0);
- idx = le16_to_cpu(el->l_next_free_rec) - 1;
- rec = &el->l_recs[idx];
- range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
- for (i = 0; i < path->p_tree_depth; i++) {
- el = path->p_node[i].el;
- idx = le16_to_cpu(el->l_next_free_rec) - 1;
- rec = &el->l_recs[idx];
- rec->e_int_clusters = cpu_to_le32(range);
- le32_add_cpu(&rec->e_int_clusters, -le32_to_cpu(rec->e_cpos));
- ocfs2_journal_dirty(handle, path->p_node[i].bh);
- }
- out:
- return ret;
- }
- static void ocfs2_unlink_path(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- struct ocfs2_path *path, int unlink_start)
- {
- int ret, i;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *el;
- struct buffer_head *bh;
- for(i = unlink_start; i < path_num_items(path); i++) {
- bh = path->p_node[i].bh;
- eb = (struct ocfs2_extent_block *)bh->b_data;
-
- el = &eb->h_list;
- if (le16_to_cpu(el->l_next_free_rec) > 1) {
- mlog(ML_ERROR,
- "Inode %llu, attempted to remove extent block "
- "%llu with %u records\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- (unsigned long long)le64_to_cpu(eb->h_blkno),
- le16_to_cpu(el->l_next_free_rec));
- ocfs2_journal_dirty(handle, bh);
- ocfs2_remove_from_cache(et->et_ci, bh);
- continue;
- }
- el->l_next_free_rec = 0;
- memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
- ocfs2_journal_dirty(handle, bh);
- ret = ocfs2_cache_extent_block_free(dealloc, eb);
- if (ret)
- mlog_errno(ret);
- ocfs2_remove_from_cache(et->et_ci, bh);
- }
- }
- static void ocfs2_unlink_subtree(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *left_path,
- struct ocfs2_path *right_path,
- int subtree_index,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
- {
- int i;
- struct buffer_head *root_bh = left_path->p_node[subtree_index].bh;
- struct ocfs2_extent_list *root_el = left_path->p_node[subtree_index].el;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_block *eb;
- el = path_leaf_el(left_path);
- eb = (struct ocfs2_extent_block *)right_path->p_node[subtree_index + 1].bh->b_data;
- for(i = 1; i < le16_to_cpu(root_el->l_next_free_rec); i++)
- if (root_el->l_recs[i].e_blkno == eb->h_blkno)
- break;
- BUG_ON(i >= le16_to_cpu(root_el->l_next_free_rec));
- memset(&root_el->l_recs[i], 0, sizeof(struct ocfs2_extent_rec));
- le16_add_cpu(&root_el->l_next_free_rec, -1);
- eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
- eb->h_next_leaf_blk = 0;
- ocfs2_journal_dirty(handle, root_bh);
- ocfs2_journal_dirty(handle, path_leaf_bh(left_path));
- ocfs2_unlink_path(handle, et, dealloc, right_path,
- subtree_index + 1);
- }
- static int ocfs2_rotate_subtree_left(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *left_path,
- struct ocfs2_path *right_path,
- int subtree_index,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- int *deleted)
- {
- int ret, i, del_right_subtree = 0, right_has_empty = 0;
- struct buffer_head *root_bh, *et_root_bh = path_root_bh(right_path);
- struct ocfs2_extent_list *right_leaf_el, *left_leaf_el;
- struct ocfs2_extent_block *eb;
- *deleted = 0;
- right_leaf_el = path_leaf_el(right_path);
- left_leaf_el = path_leaf_el(left_path);
- root_bh = left_path->p_node[subtree_index].bh;
- BUG_ON(root_bh != right_path->p_node[subtree_index].bh);
- if (!ocfs2_is_empty_extent(&left_leaf_el->l_recs[0]))
- return 0;
- eb = (struct ocfs2_extent_block *)path_leaf_bh(right_path)->b_data;
- if (ocfs2_is_empty_extent(&right_leaf_el->l_recs[0])) {
-
- if (eb->h_next_leaf_blk != 0ULL)
- return -EAGAIN;
- if (le16_to_cpu(right_leaf_el->l_next_free_rec) > 1) {
- ret = ocfs2_journal_access_eb(handle, et->et_ci,
- path_leaf_bh(right_path),
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ocfs2_remove_empty_extent(right_leaf_el);
- } else
- right_has_empty = 1;
- }
- if (eb->h_next_leaf_blk == 0ULL &&
- le16_to_cpu(right_leaf_el->l_next_free_rec) == 1) {
-
- ret = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- del_right_subtree = 1;
- }
-
- BUG_ON(right_has_empty && !del_right_subtree);
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, right_path,
- subtree_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- for(i = subtree_index + 1; i < path_num_items(right_path); i++) {
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- right_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- left_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- if (!right_has_empty) {
-
- ocfs2_rotate_leaf(left_leaf_el, &right_leaf_el->l_recs[0]);
- memset(&right_leaf_el->l_recs[0], 0,
- sizeof(struct ocfs2_extent_rec));
- }
- if (eb->h_next_leaf_blk == 0ULL) {
-
- ocfs2_remove_empty_extent(right_leaf_el);
- }
- ocfs2_journal_dirty(handle, path_leaf_bh(left_path));
- ocfs2_journal_dirty(handle, path_leaf_bh(right_path));
- if (del_right_subtree) {
- ocfs2_unlink_subtree(handle, et, left_path, right_path,
- subtree_index, dealloc);
- ret = ocfs2_update_edge_lengths(handle, et, subtree_index,
- left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
- ocfs2_et_set_last_eb_blk(et, le64_to_cpu(eb->h_blkno));
-
- if (right_has_empty)
- ocfs2_remove_empty_extent(left_leaf_el);
- ocfs2_journal_dirty(handle, et_root_bh);
- *deleted = 1;
- } else
- ocfs2_complete_edge_insert(handle, left_path, right_path,
- subtree_index);
- out:
- return ret;
- }
- int ocfs2_find_cpos_for_right_leaf(struct super_block *sb,
- struct ocfs2_path *path, u32 *cpos)
- {
- int i, j, ret = 0;
- u64 blkno;
- struct ocfs2_extent_list *el;
- *cpos = 0;
- if (path->p_tree_depth == 0)
- return 0;
- blkno = path_leaf_bh(path)->b_blocknr;
-
- i = path->p_tree_depth - 1;
- while (i >= 0) {
- int next_free;
- el = path->p_node[i].el;
-
- next_free = le16_to_cpu(el->l_next_free_rec);
- for(j = 0; j < le16_to_cpu(el->l_next_free_rec); j++) {
- if (le64_to_cpu(el->l_recs[j].e_blkno) == blkno) {
- if (j == (next_free - 1)) {
- if (i == 0) {
-
- goto out;
- }
-
- goto next_node;
- }
- *cpos = le32_to_cpu(el->l_recs[j + 1].e_cpos);
- goto out;
- }
- }
-
- ocfs2_error(sb, "Invalid extent tree at extent block %llu\n",
- (unsigned long long)blkno);
- ret = -EROFS;
- goto out;
- next_node:
- blkno = path->p_node[i].bh->b_blocknr;
- i--;
- }
- out:
- return ret;
- }
- static int ocfs2_rotate_rightmost_leaf_left(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path)
- {
- int ret;
- struct buffer_head *bh = path_leaf_bh(path);
- struct ocfs2_extent_list *el = path_leaf_el(path);
- if (!ocfs2_is_empty_extent(&el->l_recs[0]))
- return 0;
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, path,
- path_num_items(path) - 1);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ocfs2_remove_empty_extent(el);
- ocfs2_journal_dirty(handle, bh);
- out:
- return ret;
- }
- static int __ocfs2_rotate_tree_left(handle_t *handle,
- struct ocfs2_extent_tree *et,
- int orig_credits,
- struct ocfs2_path *path,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- struct ocfs2_path **empty_extent_path)
- {
- int ret, subtree_root, deleted;
- u32 right_cpos;
- struct ocfs2_path *left_path = NULL;
- struct ocfs2_path *right_path = NULL;
- struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci);
- if (!ocfs2_is_empty_extent(&(path_leaf_el(path)->l_recs[0])))
- return 0;
- *empty_extent_path = NULL;
- ret = ocfs2_find_cpos_for_right_leaf(sb, path, &right_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- left_path = ocfs2_new_path_from_path(path);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ocfs2_cp_path(left_path, path);
- right_path = ocfs2_new_path_from_path(path);
- if (!right_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- while (right_cpos) {
- ret = ocfs2_find_path(et->et_ci, right_path, right_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- subtree_root = ocfs2_find_subtree_root(et, left_path,
- right_path);
- trace_ocfs2_rotate_subtree(subtree_root,
- (unsigned long long)
- right_path->p_node[subtree_root].bh->b_blocknr,
- right_path->p_tree_depth);
- ret = ocfs2_extend_rotate_transaction(handle, 0,
- orig_credits, left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- left_path, 0);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_rotate_subtree_left(handle, et, left_path,
- right_path, subtree_root,
- dealloc, &deleted);
- if (ret == -EAGAIN) {
-
- *empty_extent_path = right_path;
- right_path = NULL;
- goto out;
- }
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- if (deleted)
- break;
- ocfs2_mv_path(left_path, right_path);
- ret = ocfs2_find_cpos_for_right_leaf(sb, left_path,
- &right_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- out:
- ocfs2_free_path(right_path);
- ocfs2_free_path(left_path);
- return ret;
- }
- static int ocfs2_remove_rightmost_path(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
- {
- int ret, subtree_index;
- u32 cpos;
- struct ocfs2_path *left_path = NULL;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *el;
- ret = ocfs2_et_sanity_check(et);
- if (ret)
- goto out;
- ret = ocfs2_journal_access_path(et->et_ci, handle, path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_cpos_for_left_leaf(ocfs2_metadata_cache_get_super(et->et_ci),
- path, &cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- if (cpos) {
-
- left_path = ocfs2_new_path_from_path(path);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, left_path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_journal_access_path(et->et_ci, handle, left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- subtree_index = ocfs2_find_subtree_root(et, left_path, path);
- ocfs2_unlink_subtree(handle, et, left_path, path,
- subtree_index, dealloc);
- ret = ocfs2_update_edge_lengths(handle, et, subtree_index,
- left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
- ocfs2_et_set_last_eb_blk(et, le64_to_cpu(eb->h_blkno));
- } else {
-
- ocfs2_unlink_path(handle, et, dealloc, path, 1);
- el = et->et_root_el;
- el->l_tree_depth = 0;
- el->l_next_free_rec = 0;
- memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
- ocfs2_et_set_last_eb_blk(et, 0);
- }
- ocfs2_journal_dirty(handle, path_root_bh(path));
- out:
- ocfs2_free_path(left_path);
- return ret;
- }
- static int ocfs2_remove_rightmost_empty_extent(struct ocfs2_super *osb,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
- {
- handle_t *handle;
- int ret;
- int credits = path->p_tree_depth * 2 + 1;
- handle = ocfs2_start_trans(osb, credits);
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- mlog_errno(ret);
- return ret;
- }
- ret = ocfs2_remove_rightmost_path(handle, et, path, dealloc);
- if (ret)
- mlog_errno(ret);
- ocfs2_commit_trans(osb, handle);
- return ret;
- }
- static int ocfs2_rotate_tree_left(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
- {
- int ret, orig_credits = handle->h_buffer_credits;
- struct ocfs2_path *tmp_path = NULL, *restart_path = NULL;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *el;
- el = path_leaf_el(path);
- if (!ocfs2_is_empty_extent(&el->l_recs[0]))
- return 0;
- if (path->p_tree_depth == 0) {
- rightmost_no_delete:
-
- ret = ocfs2_rotate_rightmost_leaf_left(handle, et, path);
- if (ret)
- mlog_errno(ret);
- goto out;
- }
-
- eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
- el = &eb->h_list;
- if (eb->h_next_leaf_blk == 0) {
-
- if (le16_to_cpu(el->l_next_free_rec) > 1)
- goto rightmost_no_delete;
- if (le16_to_cpu(el->l_next_free_rec) == 0) {
- ret = -EIO;
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu has empty extent block at %llu\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- (unsigned long long)le64_to_cpu(eb->h_blkno));
- goto out;
- }
-
- ret = ocfs2_remove_rightmost_path(handle, et, path,
- dealloc);
- if (ret)
- mlog_errno(ret);
- goto out;
- }
-
- try_rotate:
- ret = __ocfs2_rotate_tree_left(handle, et, orig_credits, path,
- dealloc, &restart_path);
- if (ret && ret != -EAGAIN) {
- mlog_errno(ret);
- goto out;
- }
- while (ret == -EAGAIN) {
- tmp_path = restart_path;
- restart_path = NULL;
- ret = __ocfs2_rotate_tree_left(handle, et, orig_credits,
- tmp_path, dealloc,
- &restart_path);
- if (ret && ret != -EAGAIN) {
- mlog_errno(ret);
- goto out;
- }
- ocfs2_free_path(tmp_path);
- tmp_path = NULL;
- if (ret == 0)
- goto try_rotate;
- }
- out:
- ocfs2_free_path(tmp_path);
- ocfs2_free_path(restart_path);
- return ret;
- }
- static void ocfs2_cleanup_merge(struct ocfs2_extent_list *el,
- int index)
- {
- struct ocfs2_extent_rec *rec = &el->l_recs[index];
- unsigned int size;
- if (rec->e_leaf_clusters == 0) {
-
- if (index > 0) {
- BUG_ON(ocfs2_is_empty_extent(&el->l_recs[0]));
- size = index * sizeof(struct ocfs2_extent_rec);
- memmove(&el->l_recs[1], &el->l_recs[0], size);
- }
-
- memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
- }
- }
- static int ocfs2_get_right_path(struct ocfs2_extent_tree *et,
- struct ocfs2_path *left_path,
- struct ocfs2_path **ret_right_path)
- {
- int ret;
- u32 right_cpos;
- struct ocfs2_path *right_path = NULL;
- struct ocfs2_extent_list *left_el;
- *ret_right_path = NULL;
-
- BUG_ON(left_path->p_tree_depth == 0);
- left_el = path_leaf_el(left_path);
- BUG_ON(left_el->l_next_free_rec != left_el->l_count);
- ret = ocfs2_find_cpos_for_right_leaf(ocfs2_metadata_cache_get_super(et->et_ci),
- left_path, &right_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- BUG_ON(right_cpos == 0);
- right_path = ocfs2_new_path_from_path(left_path);
- if (!right_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, right_path, right_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- *ret_right_path = right_path;
- out:
- if (ret)
- ocfs2_free_path(right_path);
- return ret;
- }
- static int ocfs2_merge_rec_right(struct ocfs2_path *left_path,
- handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *split_rec,
- int index)
- {
- int ret, next_free, i;
- unsigned int split_clusters = le16_to_cpu(split_rec->e_leaf_clusters);
- struct ocfs2_extent_rec *left_rec;
- struct ocfs2_extent_rec *right_rec;
- struct ocfs2_extent_list *right_el;
- struct ocfs2_path *right_path = NULL;
- int subtree_index = 0;
- struct ocfs2_extent_list *el = path_leaf_el(left_path);
- struct buffer_head *bh = path_leaf_bh(left_path);
- struct buffer_head *root_bh = NULL;
- BUG_ON(index >= le16_to_cpu(el->l_next_free_rec));
- left_rec = &el->l_recs[index];
- if (index == le16_to_cpu(el->l_next_free_rec) - 1 &&
- le16_to_cpu(el->l_next_free_rec) == le16_to_cpu(el->l_count)) {
-
- ret = ocfs2_get_right_path(et, left_path, &right_path);
- if (ret) {
- mlog_errno(ret);
- return ret;
- }
- right_el = path_leaf_el(right_path);
- next_free = le16_to_cpu(right_el->l_next_free_rec);
- BUG_ON(next_free <= 0);
- right_rec = &right_el->l_recs[0];
- if (ocfs2_is_empty_extent(right_rec)) {
- BUG_ON(next_free <= 1);
- right_rec = &right_el->l_recs[1];
- }
- BUG_ON(le32_to_cpu(left_rec->e_cpos) +
- le16_to_cpu(left_rec->e_leaf_clusters) !=
- le32_to_cpu(right_rec->e_cpos));
- subtree_index = ocfs2_find_subtree_root(et, left_path,
- right_path);
- ret = ocfs2_extend_rotate_transaction(handle, subtree_index,
- handle->h_buffer_credits,
- right_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- root_bh = left_path->p_node[subtree_index].bh;
- BUG_ON(root_bh != right_path->p_node[subtree_index].bh);
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, right_path,
- subtree_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- for (i = subtree_index + 1;
- i < path_num_items(right_path); i++) {
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- right_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- left_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- } else {
- BUG_ON(index == le16_to_cpu(el->l_next_free_rec) - 1);
- right_rec = &el->l_recs[index + 1];
- }
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, left_path,
- path_num_items(left_path) - 1);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- le16_add_cpu(&left_rec->e_leaf_clusters, -split_clusters);
- le32_add_cpu(&right_rec->e_cpos, -split_clusters);
- le64_add_cpu(&right_rec->e_blkno,
- -ocfs2_clusters_to_blocks(ocfs2_metadata_cache_get_super(et->et_ci),
- split_clusters));
- le16_add_cpu(&right_rec->e_leaf_clusters, split_clusters);
- ocfs2_cleanup_merge(el, index);
- ocfs2_journal_dirty(handle, bh);
- if (right_path) {
- ocfs2_journal_dirty(handle, path_leaf_bh(right_path));
- ocfs2_complete_edge_insert(handle, left_path, right_path,
- subtree_index);
- }
- out:
- ocfs2_free_path(right_path);
- return ret;
- }
- static int ocfs2_get_left_path(struct ocfs2_extent_tree *et,
- struct ocfs2_path *right_path,
- struct ocfs2_path **ret_left_path)
- {
- int ret;
- u32 left_cpos;
- struct ocfs2_path *left_path = NULL;
- *ret_left_path = NULL;
-
- BUG_ON(right_path->p_tree_depth == 0);
- ret = ocfs2_find_cpos_for_left_leaf(ocfs2_metadata_cache_get_super(et->et_ci),
- right_path, &left_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- BUG_ON(left_cpos == 0);
- left_path = ocfs2_new_path_from_path(right_path);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, left_path, left_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- *ret_left_path = left_path;
- out:
- if (ret)
- ocfs2_free_path(left_path);
- return ret;
- }
- static int ocfs2_merge_rec_left(struct ocfs2_path *right_path,
- handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *split_rec,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- int index)
- {
- int ret, i, subtree_index = 0, has_empty_extent = 0;
- unsigned int split_clusters = le16_to_cpu(split_rec->e_leaf_clusters);
- struct ocfs2_extent_rec *left_rec;
- struct ocfs2_extent_rec *right_rec;
- struct ocfs2_extent_list *el = path_leaf_el(right_path);
- struct buffer_head *bh = path_leaf_bh(right_path);
- struct buffer_head *root_bh = NULL;
- struct ocfs2_path *left_path = NULL;
- struct ocfs2_extent_list *left_el;
- BUG_ON(index < 0);
- right_rec = &el->l_recs[index];
- if (index == 0) {
-
- ret = ocfs2_get_left_path(et, right_path, &left_path);
- if (ret) {
- mlog_errno(ret);
- return ret;
- }
- left_el = path_leaf_el(left_path);
- BUG_ON(le16_to_cpu(left_el->l_next_free_rec) !=
- le16_to_cpu(left_el->l_count));
- left_rec = &left_el->l_recs[
- le16_to_cpu(left_el->l_next_free_rec) - 1];
- BUG_ON(le32_to_cpu(left_rec->e_cpos) +
- le16_to_cpu(left_rec->e_leaf_clusters) !=
- le32_to_cpu(split_rec->e_cpos));
- subtree_index = ocfs2_find_subtree_root(et, left_path,
- right_path);
- ret = ocfs2_extend_rotate_transaction(handle, subtree_index,
- handle->h_buffer_credits,
- left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- root_bh = left_path->p_node[subtree_index].bh;
- BUG_ON(root_bh != right_path->p_node[subtree_index].bh);
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, right_path,
- subtree_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- for (i = subtree_index + 1;
- i < path_num_items(right_path); i++) {
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- right_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci,
- left_path, i);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- } else {
- left_rec = &el->l_recs[index - 1];
- if (ocfs2_is_empty_extent(&el->l_recs[0]))
- has_empty_extent = 1;
- }
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, right_path,
- path_num_items(right_path) - 1);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- if (has_empty_extent && index == 1) {
-
- *left_rec = *split_rec;
- has_empty_extent = 0;
- } else
- le16_add_cpu(&left_rec->e_leaf_clusters, split_clusters);
- le32_add_cpu(&right_rec->e_cpos, split_clusters);
- le64_add_cpu(&right_rec->e_blkno,
- ocfs2_clusters_to_blocks(ocfs2_metadata_cache_get_super(et->et_ci),
- split_clusters));
- le16_add_cpu(&right_rec->e_leaf_clusters, -split_clusters);
- ocfs2_cleanup_merge(el, index);
- ocfs2_journal_dirty(handle, bh);
- if (left_path) {
- ocfs2_journal_dirty(handle, path_leaf_bh(left_path));
-
- if (le16_to_cpu(right_rec->e_leaf_clusters) == 0 &&
- le16_to_cpu(el->l_next_free_rec) == 1) {
-
- ret = ocfs2_extend_rotate_transaction(handle, 0,
- handle->h_buffer_credits,
- right_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_remove_rightmost_path(handle, et,
- right_path,
- dealloc);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- ocfs2_mv_path(right_path, left_path);
- left_path = NULL;
- } else
- ocfs2_complete_edge_insert(handle, left_path,
- right_path, subtree_index);
- }
- out:
- ocfs2_free_path(left_path);
- return ret;
- }
- static int ocfs2_try_to_merge_extent(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- int split_index,
- struct ocfs2_extent_rec *split_rec,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- struct ocfs2_merge_ctxt *ctxt)
- {
- int ret = 0;
- struct ocfs2_extent_list *el = path_leaf_el(path);
- struct ocfs2_extent_rec *rec = &el->l_recs[split_index];
- BUG_ON(ctxt->c_contig_type == CONTIG_NONE);
- if (ctxt->c_split_covers_rec && ctxt->c_has_empty_extent) {
-
- ret = ocfs2_extend_rotate_transaction(handle, 0,
- handle->h_buffer_credits,
- path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- ret = ocfs2_rotate_tree_left(handle, et, path, dealloc);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- split_index--;
- rec = &el->l_recs[split_index];
- }
- if (ctxt->c_contig_type == CONTIG_LEFTRIGHT) {
-
- BUG_ON(!ctxt->c_split_covers_rec);
-
- ret = ocfs2_merge_rec_right(path, handle, et, split_rec,
- split_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- BUG_ON(!ocfs2_is_empty_extent(&el->l_recs[0]));
-
- ret = ocfs2_extend_rotate_transaction(handle, 0,
- handle->h_buffer_credits,
- path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- ret = ocfs2_rotate_tree_left(handle, et, path, dealloc);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- rec = &el->l_recs[split_index];
-
- ret = ocfs2_merge_rec_left(path, handle, et, rec,
- dealloc, split_index);
- 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_rotate_tree_left(handle, et, path, dealloc);
-
- if (ret)
- mlog_errno(ret);
- ret = 0;
- } else {
-
- if (ctxt->c_contig_type == CONTIG_RIGHT) {
- ret = ocfs2_merge_rec_left(path, handle, et,
- split_rec, dealloc,
- split_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- } else {
- ret = ocfs2_merge_rec_right(path, handle,
- et, split_rec,
- split_index);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- if (ctxt->c_split_covers_rec) {
-
- ret = ocfs2_extend_rotate_transaction(handle, 0,
- handle->h_buffer_credits,
- path);
- if (ret) {
- mlog_errno(ret);
- ret = 0;
- goto out;
- }
-
- ret = ocfs2_rotate_tree_left(handle, et, path,
- dealloc);
- if (ret)
- mlog_errno(ret);
- ret = 0;
- }
- }
- out:
- return ret;
- }
- static void ocfs2_subtract_from_rec(struct super_block *sb,
- enum ocfs2_split_type split,
- struct ocfs2_extent_rec *rec,
- struct ocfs2_extent_rec *split_rec)
- {
- u64 len_blocks;
- len_blocks = ocfs2_clusters_to_blocks(sb,
- le16_to_cpu(split_rec->e_leaf_clusters));
- if (split == SPLIT_LEFT) {
-
- le32_add_cpu(&rec->e_cpos,
- le16_to_cpu(split_rec->e_leaf_clusters));
- le64_add_cpu(&rec->e_blkno, len_blocks);
- le16_add_cpu(&rec->e_leaf_clusters,
- -le16_to_cpu(split_rec->e_leaf_clusters));
- } else {
-
- le16_add_cpu(&rec->e_leaf_clusters,
- -le16_to_cpu(split_rec->e_leaf_clusters));
- }
- }
- static void ocfs2_insert_at_leaf(struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *insert_rec,
- struct ocfs2_extent_list *el,
- struct ocfs2_insert_type *insert)
- {
- int i = insert->ins_contig_index;
- unsigned int range;
- struct ocfs2_extent_rec *rec;
- BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
- if (insert->ins_split != SPLIT_NONE) {
- i = ocfs2_search_extent_list(el, le32_to_cpu(insert_rec->e_cpos));
- BUG_ON(i == -1);
- rec = &el->l_recs[i];
- ocfs2_subtract_from_rec(ocfs2_metadata_cache_get_super(et->et_ci),
- insert->ins_split, rec,
- insert_rec);
- goto rotate;
- }
-
- if (insert->ins_contig != CONTIG_NONE) {
- rec = &el->l_recs[i];
- if (insert->ins_contig == CONTIG_LEFT) {
- rec->e_blkno = insert_rec->e_blkno;
- rec->e_cpos = insert_rec->e_cpos;
- }
- le16_add_cpu(&rec->e_leaf_clusters,
- le16_to_cpu(insert_rec->e_leaf_clusters));
- return;
- }
-
- if (le16_to_cpu(el->l_next_free_rec) == 0 ||
- ((le16_to_cpu(el->l_next_free_rec) == 1) &&
- ocfs2_is_empty_extent(&el->l_recs[0]))) {
- el->l_recs[0] = *insert_rec;
- el->l_next_free_rec = cpu_to_le16(1);
- return;
- }
-
- if (insert->ins_appending == APPEND_TAIL) {
- i = le16_to_cpu(el->l_next_free_rec) - 1;
- rec = &el->l_recs[i];
- range = le32_to_cpu(rec->e_cpos)
- + le16_to_cpu(rec->e_leaf_clusters);
- BUG_ON(le32_to_cpu(insert_rec->e_cpos) < range);
- mlog_bug_on_msg(le16_to_cpu(el->l_next_free_rec) >=
- le16_to_cpu(el->l_count),
- "owner %llu, depth %u, count %u, next free %u, "
- "rec.cpos %u, rec.clusters %u, "
- "insert.cpos %u, insert.clusters %u\n",
- ocfs2_metadata_cache_owner(et->et_ci),
- le16_to_cpu(el->l_tree_depth),
- le16_to_cpu(el->l_count),
- le16_to_cpu(el->l_next_free_rec),
- le32_to_cpu(el->l_recs[i].e_cpos),
- le16_to_cpu(el->l_recs[i].e_leaf_clusters),
- le32_to_cpu(insert_rec->e_cpos),
- le16_to_cpu(insert_rec->e_leaf_clusters));
- i++;
- el->l_recs[i] = *insert_rec;
- le16_add_cpu(&el->l_next_free_rec, 1);
- return;
- }
- rotate:
-
- ocfs2_rotate_leaf(el, insert_rec);
- }
- static void ocfs2_adjust_rightmost_records(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_extent_rec *insert_rec)
- {
- int ret, i, next_free;
- struct buffer_head *bh;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_rec *rec;
-
- for (i = 0; i < path->p_tree_depth; i++) {
- bh = path->p_node[i].bh;
- el = path->p_node[i].el;
- next_free = le16_to_cpu(el->l_next_free_rec);
- if (next_free == 0) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu has a bad extent list\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci));
- ret = -EIO;
- return;
- }
- rec = &el->l_recs[next_free - 1];
- rec->e_int_clusters = insert_rec->e_cpos;
- le32_add_cpu(&rec->e_int_clusters,
- le16_to_cpu(insert_rec->e_leaf_clusters));
- le32_add_cpu(&rec->e_int_clusters,
- -le32_to_cpu(rec->e_cpos));
- ocfs2_journal_dirty(handle, bh);
- }
- }
- static int ocfs2_append_rec_to_path(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *insert_rec,
- struct ocfs2_path *right_path,
- struct ocfs2_path **ret_left_path)
- {
- int ret, next_free;
- struct ocfs2_extent_list *el;
- struct ocfs2_path *left_path = NULL;
- *ret_left_path = NULL;
-
- BUG_ON(right_path->p_tree_depth == 0);
-
- el = path_leaf_el(right_path);
- next_free = le16_to_cpu(el->l_next_free_rec);
- if (next_free == 0 ||
- (next_free == 1 && ocfs2_is_empty_extent(&el->l_recs[0]))) {
- u32 left_cpos;
- ret = ocfs2_find_cpos_for_left_leaf(ocfs2_metadata_cache_get_super(et->et_ci),
- right_path, &left_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- trace_ocfs2_append_rec_to_path(
- (unsigned long long)
- ocfs2_metadata_cache_owner(et->et_ci),
- le32_to_cpu(insert_rec->e_cpos),
- left_cpos);
-
- if (left_cpos) {
- left_path = ocfs2_new_path_from_path(right_path);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, left_path,
- left_cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- }
- }
- ret = ocfs2_journal_access_path(et->et_ci, handle, right_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ocfs2_adjust_rightmost_records(handle, et, right_path, insert_rec);
- *ret_left_path = left_path;
- ret = 0;
- out:
- if (ret != 0)
- ocfs2_free_path(left_path);
- return ret;
- }
- static void ocfs2_split_record(struct ocfs2_extent_tree *et,
- struct ocfs2_path *left_path,
- struct ocfs2_path *right_path,
- struct ocfs2_extent_rec *split_rec,
- enum ocfs2_split_type split)
- {
- int index;
- u32 cpos = le32_to_cpu(split_rec->e_cpos);
- struct ocfs2_extent_list *left_el = NULL, *right_el, *insert_el, *el;
- struct ocfs2_extent_rec *rec, *tmprec;
- right_el = path_leaf_el(right_path);
- if (left_path)
- left_el = path_leaf_el(left_path);
- el = right_el;
- insert_el = right_el;
- index = ocfs2_search_extent_list(el, cpos);
- if (index != -1) {
- if (index == 0 && left_path) {
- BUG_ON(ocfs2_is_empty_extent(&el->l_recs[0]));
-
- if (split == SPLIT_LEFT) {
-
- insert_el = left_el;
- } else {
-
- tmprec = &right_el->l_recs[index];
- ocfs2_rotate_leaf(left_el, tmprec);
- el = left_el;
- memset(tmprec, 0, sizeof(*tmprec));
- index = ocfs2_search_extent_list(left_el, cpos);
- BUG_ON(index == -1);
- }
- }
- } else {
- BUG_ON(!left_path);
- BUG_ON(!ocfs2_is_empty_extent(&left_el->l_recs[0]));
-
- el = left_el;
- insert_el = left_el;
- index = ocfs2_search_extent_list(el, cpos);
- BUG_ON(index == -1);
- }
- rec = &el->l_recs[index];
- ocfs2_subtract_from_rec(ocfs2_metadata_cache_get_super(et->et_ci),
- split, rec, split_rec);
- ocfs2_rotate_leaf(insert_el, split_rec);
- }
- static int ocfs2_insert_path(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *left_path,
- struct ocfs2_path *right_path,
- struct ocfs2_extent_rec *insert_rec,
- struct ocfs2_insert_type *insert)
- {
- int ret, subtree_index;
- struct buffer_head *leaf_bh = path_leaf_bh(right_path);
- if (left_path) {
-
- ret = ocfs2_extend_trans(handle, left_path->p_tree_depth);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_journal_access_path(et->et_ci, handle, left_path);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- }
-
- ret = ocfs2_journal_access_path(et->et_ci, handle, right_path);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- if (insert->ins_split != SPLIT_NONE) {
-
- ocfs2_split_record(et, left_path, right_path,
- insert_rec, insert->ins_split);
-
- if (left_path)
- ocfs2_journal_dirty(handle,
- path_leaf_bh(left_path));
- } else
- ocfs2_insert_at_leaf(et, insert_rec, path_leaf_el(right_path),
- insert);
- ocfs2_journal_dirty(handle, leaf_bh);
- if (left_path) {
-
- subtree_index = ocfs2_find_subtree_root(et, left_path,
- right_path);
- ocfs2_complete_edge_insert(handle, left_path, right_path,
- subtree_index);
- }
- ret = 0;
- out:
- return ret;
- }
- static int ocfs2_do_insert_extent(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_extent_rec *insert_rec,
- struct ocfs2_insert_type *type)
- {
- int ret, rotate = 0;
- u32 cpos;
- struct ocfs2_path *right_path = NULL;
- struct ocfs2_path *left_path = NULL;
- struct ocfs2_extent_list *el;
- el = et->et_root_el;
- ret = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- if (le16_to_cpu(el->l_tree_depth) == 0) {
- ocfs2_insert_at_leaf(et, insert_rec, el, type);
- goto out_update_clusters;
- }
- right_path = ocfs2_new_path_from_et(et);
- if (!right_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
-
- cpos = le32_to_cpu(insert_rec->e_cpos);
- if (type->ins_appending == APPEND_NONE &&
- type->ins_contig == CONTIG_NONE) {
- rotate = 1;
- cpos = UINT_MAX;
- }
- ret = ocfs2_find_path(et->et_ci, right_path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- if (rotate) {
- ret = ocfs2_rotate_tree_right(handle, et, type->ins_split,
- le32_to_cpu(insert_rec->e_cpos),
- right_path, &left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- ret = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- } else if (type->ins_appending == APPEND_TAIL
- && type->ins_contig != CONTIG_LEFT) {
- ret = ocfs2_append_rec_to_path(handle, et, insert_rec,
- right_path, &left_path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- ret = ocfs2_insert_path(handle, et, left_path, right_path,
- insert_rec, type);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- out_update_clusters:
- if (type->ins_split == SPLIT_NONE)
- ocfs2_et_update_clusters(et,
- le16_to_cpu(insert_rec->e_leaf_clusters));
- ocfs2_journal_dirty(handle, et->et_root_bh);
- out:
- ocfs2_free_path(left_path);
- ocfs2_free_path(right_path);
- return ret;
- }
- static int ocfs2_figure_merge_contig_type(struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_extent_list *el, int index,
- struct ocfs2_extent_rec *split_rec,
- struct ocfs2_merge_ctxt *ctxt)
- {
- int status = 0;
- enum ocfs2_contig_type ret = CONTIG_NONE;
- u32 left_cpos, right_cpos;
- struct ocfs2_extent_rec *rec = NULL;
- struct ocfs2_extent_list *new_el;
- struct ocfs2_path *left_path = NULL, *right_path = NULL;
- struct buffer_head *bh;
- struct ocfs2_extent_block *eb;
- struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci);
- if (index > 0) {
- rec = &el->l_recs[index - 1];
- } else if (path->p_tree_depth > 0) {
- status = ocfs2_find_cpos_for_left_leaf(sb, path, &left_cpos);
- if (status)
- goto exit;
- if (left_cpos != 0) {
- left_path = ocfs2_new_path_from_path(path);
- if (!left_path) {
- status = -ENOMEM;
- mlog_errno(status);
- goto exit;
- }
- status = ocfs2_find_path(et->et_ci, left_path,
- left_cpos);
- if (status)
- goto free_left_path;
- new_el = path_leaf_el(left_path);
- if (le16_to_cpu(new_el->l_next_free_rec) !=
- le16_to_cpu(new_el->l_count)) {
- bh = path_leaf_bh(left_path);
- eb = (struct ocfs2_extent_block *)bh->b_data;
- ocfs2_error(sb,
- "Extent block #%llu has an invalid l_next_free_rec of %d. It should have matched the l_count of %d\n",
- (unsigned long long)le64_to_cpu(eb->h_blkno),
- le16_to_cpu(new_el->l_next_free_rec),
- le16_to_cpu(new_el->l_count));
- status = -EINVAL;
- goto free_left_path;
- }
- rec = &new_el->l_recs[
- le16_to_cpu(new_el->l_next_free_rec) - 1];
- }
- }
-
- if (rec) {
- if (index == 1 && ocfs2_is_empty_extent(rec)) {
- if (split_rec->e_cpos == el->l_recs[index].e_cpos)
- ret = CONTIG_RIGHT;
- } else {
- ret = ocfs2_et_extent_contig(et, rec, split_rec);
- }
- }
- rec = NULL;
- if (index < (le16_to_cpu(el->l_next_free_rec) - 1))
- rec = &el->l_recs[index + 1];
- else if (le16_to_cpu(el->l_next_free_rec) == le16_to_cpu(el->l_count) &&
- path->p_tree_depth > 0) {
- status = ocfs2_find_cpos_for_right_leaf(sb, path, &right_cpos);
- if (status)
- goto free_left_path;
- if (right_cpos == 0)
- goto free_left_path;
- right_path = ocfs2_new_path_from_path(path);
- if (!right_path) {
- status = -ENOMEM;
- mlog_errno(status);
- goto free_left_path;
- }
- status = ocfs2_find_path(et->et_ci, right_path, right_cpos);
- if (status)
- goto free_right_path;
- new_el = path_leaf_el(right_path);
- rec = &new_el->l_recs[0];
- if (ocfs2_is_empty_extent(rec)) {
- if (le16_to_cpu(new_el->l_next_free_rec) <= 1) {
- bh = path_leaf_bh(right_path);
- eb = (struct ocfs2_extent_block *)bh->b_data;
- ocfs2_error(sb,
- "Extent block #%llu has an invalid l_next_free_rec of %d\n",
- (unsigned long long)le64_to_cpu(eb->h_blkno),
- le16_to_cpu(new_el->l_next_free_rec));
- status = -EINVAL;
- goto free_right_path;
- }
- rec = &new_el->l_recs[1];
- }
- }
- if (rec) {
- enum ocfs2_contig_type contig_type;
- contig_type = ocfs2_et_extent_contig(et, rec, split_rec);
- if (contig_type == CONTIG_LEFT && ret == CONTIG_RIGHT)
- ret = CONTIG_LEFTRIGHT;
- else if (ret == CONTIG_NONE)
- ret = contig_type;
- }
- free_right_path:
- ocfs2_free_path(right_path);
- free_left_path:
- ocfs2_free_path(left_path);
- exit:
- if (status == 0)
- ctxt->c_contig_type = ret;
- return status;
- }
- static void ocfs2_figure_contig_type(struct ocfs2_extent_tree *et,
- struct ocfs2_insert_type *insert,
- struct ocfs2_extent_list *el,
- struct ocfs2_extent_rec *insert_rec)
- {
- int i;
- enum ocfs2_contig_type contig_type = CONTIG_NONE;
- BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
- for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
- contig_type = ocfs2_et_extent_contig(et, &el->l_recs[i],
- insert_rec);
- if (contig_type != CONTIG_NONE) {
- insert->ins_contig_index = i;
- break;
- }
- }
- insert->ins_contig = contig_type;
- if (insert->ins_contig != CONTIG_NONE) {
- struct ocfs2_extent_rec *rec =
- &el->l_recs[insert->ins_contig_index];
- unsigned int len = le16_to_cpu(rec->e_leaf_clusters) +
- le16_to_cpu(insert_rec->e_leaf_clusters);
-
- if (et->et_max_leaf_clusters &&
- (len > et->et_max_leaf_clusters))
- insert->ins_contig = CONTIG_NONE;
- }
- }
- static void ocfs2_figure_appending_type(struct ocfs2_insert_type *insert,
- struct ocfs2_extent_list *el,
- struct ocfs2_extent_rec *insert_rec)
- {
- int i;
- u32 cpos = le32_to_cpu(insert_rec->e_cpos);
- struct ocfs2_extent_rec *rec;
- insert->ins_appending = APPEND_NONE;
- BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
- if (!el->l_next_free_rec)
- goto set_tail_append;
- if (ocfs2_is_empty_extent(&el->l_recs[0])) {
-
- if (le16_to_cpu(el->l_next_free_rec) == 1)
- goto set_tail_append;
- }
- i = le16_to_cpu(el->l_next_free_rec) - 1;
- rec = &el->l_recs[i];
- if (cpos >=
- (le32_to_cpu(rec->e_cpos) + le16_to_cpu(rec->e_leaf_clusters)))
- goto set_tail_append;
- return;
- set_tail_append:
- insert->ins_appending = APPEND_TAIL;
- }
- static int ocfs2_figure_insert_type(struct ocfs2_extent_tree *et,
- struct buffer_head **last_eb_bh,
- struct ocfs2_extent_rec *insert_rec,
- int *free_records,
- struct ocfs2_insert_type *insert)
- {
- int ret;
- struct ocfs2_extent_block *eb;
- struct ocfs2_extent_list *el;
- struct ocfs2_path *path = NULL;
- struct buffer_head *bh = NULL;
- insert->ins_split = SPLIT_NONE;
- el = et->et_root_el;
- insert->ins_tree_depth = le16_to_cpu(el->l_tree_depth);
- if (el->l_tree_depth) {
-
- ret = ocfs2_read_extent_block(et->et_ci,
- ocfs2_et_get_last_eb_blk(et),
- &bh);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- eb = (struct ocfs2_extent_block *) bh->b_data;
- el = &eb->h_list;
- }
-
- *free_records = le16_to_cpu(el->l_count) -
- le16_to_cpu(el->l_next_free_rec);
- if (!insert->ins_tree_depth) {
- ocfs2_figure_contig_type(et, insert, el, insert_rec);
- ocfs2_figure_appending_type(insert, el, insert_rec);
- return 0;
- }
- path = ocfs2_new_path_from_et(et);
- if (!path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
-
- ret = ocfs2_find_path(et->et_ci, path, le32_to_cpu(insert_rec->e_cpos));
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- el = path_leaf_el(path);
-
- ocfs2_figure_contig_type(et, insert, el, insert_rec);
-
- if (insert->ins_contig == CONTIG_LEFT &&
- insert->ins_contig_index == 0)
- insert->ins_contig = CONTIG_NONE;
-
- if (ocfs2_et_get_last_eb_blk(et) ==
- path_leaf_bh(path)->b_blocknr) {
-
- ocfs2_figure_appending_type(insert, el, insert_rec);
- }
- out:
- ocfs2_free_path(path);
- if (ret == 0)
- *last_eb_bh = bh;
- else
- brelse(bh);
- return ret;
- }
- int ocfs2_insert_extent(handle_t *handle,
- struct ocfs2_extent_tree *et,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac)
- {
- int status;
- int uninitialized_var(free_records);
- struct buffer_head *last_eb_bh = NULL;
- struct ocfs2_insert_type insert = {0, };
- struct ocfs2_extent_rec rec;
- trace_ocfs2_insert_extent_start(
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- cpos, new_clusters);
- memset(&rec, 0, sizeof(rec));
- 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_et_insert_check(et, &rec);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
- status = ocfs2_figure_insert_type(et, &last_eb_bh, &rec,
- &free_records, &insert);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- trace_ocfs2_insert_extent(insert.ins_appending, insert.ins_contig,
- insert.ins_contig_index, free_records,
- insert.ins_tree_depth);
- if (insert.ins_contig == CONTIG_NONE && free_records == 0) {
- status = ocfs2_grow_tree(handle, et,
- &insert.ins_tree_depth, &last_eb_bh,
- meta_ac);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
- }
-
- status = ocfs2_do_insert_extent(handle, et, &rec, &insert);
- if (status < 0)
- mlog_errno(status);
- else
- ocfs2_et_extent_map_insert(et, &rec);
- bail:
- brelse(last_eb_bh);
- return status;
- }
- int ocfs2_add_clusters_in_btree(handle_t *handle,
- struct ocfs2_extent_tree *et,
- u32 *logical_offset,
- u32 clusters_to_add,
- int mark_unwritten,
- struct ocfs2_alloc_context *data_ac,
- struct ocfs2_alloc_context *meta_ac,
- enum ocfs2_alloc_restarted *reason_ret)
- {
- int status = 0, err = 0;
- int need_free = 0;
- int free_extents;
- enum ocfs2_alloc_restarted reason = RESTART_NONE;
- u32 bit_off, num_bits;
- u64 block;
- u8 flags = 0;
- struct ocfs2_super *osb =
- OCFS2_SB(ocfs2_metadata_cache_get_super(et->et_ci));
- BUG_ON(!clusters_to_add);
- if (mark_unwritten)
- flags = OCFS2_EXT_UNWRITTEN;
- free_extents = ocfs2_num_free_extents(osb, et);
- if (free_extents < 0) {
- status = free_extents;
- mlog_errno(status);
- goto leave;
- }
-
- if (!free_extents && !meta_ac) {
- err = -1;
- status = -EAGAIN;
- reason = RESTART_META;
- goto leave;
- } else if ((!free_extents)
- && (ocfs2_alloc_context_bits_left(meta_ac)
- < ocfs2_extend_meta_needed(et->et_root_el))) {
- err = -2;
- status = -EAGAIN;
- reason = RESTART_META;
- goto leave;
- }
- status = __ocfs2_claim_clusters(handle, data_ac, 1,
- clusters_to_add, &bit_off, &num_bits);
- if (status < 0) {
- if (status != -ENOSPC)
- mlog_errno(status);
- goto leave;
- }
- BUG_ON(num_bits > clusters_to_add);
-
- status = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- need_free = 1;
- goto bail;
- }
- block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
- trace_ocfs2_add_clusters_in_btree(
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- bit_off, num_bits);
- status = ocfs2_insert_extent(handle, et, *logical_offset, block,
- num_bits, flags, meta_ac);
- if (status < 0) {
- mlog_errno(status);
- need_free = 1;
- goto bail;
- }
- ocfs2_journal_dirty(handle, et->et_root_bh);
- clusters_to_add -= num_bits;
- *logical_offset += num_bits;
- if (clusters_to_add) {
- err = clusters_to_add;
- status = -EAGAIN;
- reason = RESTART_TRANS;
- }
- bail:
- if (need_free) {
- if (data_ac->ac_which == OCFS2_AC_USE_LOCAL)
- ocfs2_free_local_alloc_bits(osb, handle, data_ac,
- bit_off, num_bits);
- else
- ocfs2_free_clusters(handle,
- data_ac->ac_inode,
- data_ac->ac_bh,
- ocfs2_clusters_to_blocks(osb->sb, bit_off),
- num_bits);
- }
- leave:
- if (reason_ret)
- *reason_ret = reason;
- trace_ocfs2_add_clusters_in_btree_ret(status, reason, err);
- return status;
- }
- static void ocfs2_make_right_split_rec(struct super_block *sb,
- struct ocfs2_extent_rec *split_rec,
- u32 cpos,
- struct ocfs2_extent_rec *rec)
- {
- u32 rec_cpos = le32_to_cpu(rec->e_cpos);
- u32 rec_range = rec_cpos + le16_to_cpu(rec->e_leaf_clusters);
- memset(split_rec, 0, sizeof(struct ocfs2_extent_rec));
- split_rec->e_cpos = cpu_to_le32(cpos);
- split_rec->e_leaf_clusters = cpu_to_le16(rec_range - cpos);
- split_rec->e_blkno = rec->e_blkno;
- le64_add_cpu(&split_rec->e_blkno,
- ocfs2_clusters_to_blocks(sb, cpos - rec_cpos));
- split_rec->e_flags = rec->e_flags;
- }
- static int ocfs2_split_and_insert(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct buffer_head **last_eb_bh,
- int split_index,
- struct ocfs2_extent_rec *orig_split_rec,
- struct ocfs2_alloc_context *meta_ac)
- {
- int ret = 0, depth;
- unsigned int insert_range, rec_range, do_leftright = 0;
- struct ocfs2_extent_rec tmprec;
- struct ocfs2_extent_list *rightmost_el;
- struct ocfs2_extent_rec rec;
- struct ocfs2_extent_rec split_rec = *orig_split_rec;
- struct ocfs2_insert_type insert;
- struct ocfs2_extent_block *eb;
- leftright:
-
- rec = path_leaf_el(path)->l_recs[split_index];
- rightmost_el = et->et_root_el;
- depth = le16_to_cpu(rightmost_el->l_tree_depth);
- if (depth) {
- BUG_ON(!(*last_eb_bh));
- eb = (struct ocfs2_extent_block *) (*last_eb_bh)->b_data;
- rightmost_el = &eb->h_list;
- }
- if (le16_to_cpu(rightmost_el->l_next_free_rec) ==
- le16_to_cpu(rightmost_el->l_count)) {
- ret = ocfs2_grow_tree(handle, et,
- &depth, last_eb_bh, meta_ac);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- memset(&insert, 0, sizeof(struct ocfs2_insert_type));
- insert.ins_appending = APPEND_NONE;
- insert.ins_contig = CONTIG_NONE;
- insert.ins_tree_depth = depth;
- insert_range = le32_to_cpu(split_rec.e_cpos) +
- le16_to_cpu(split_rec.e_leaf_clusters);
- rec_range = le32_to_cpu(rec.e_cpos) +
- le16_to_cpu(rec.e_leaf_clusters);
- if (split_rec.e_cpos == rec.e_cpos) {
- insert.ins_split = SPLIT_LEFT;
- } else if (insert_range == rec_range) {
- insert.ins_split = SPLIT_RIGHT;
- } else {
-
- insert.ins_split = SPLIT_RIGHT;
- ocfs2_make_right_split_rec(ocfs2_metadata_cache_get_super(et->et_ci),
- &tmprec, insert_range, &rec);
- split_rec = tmprec;
- BUG_ON(do_leftright);
- do_leftright = 1;
- }
- ret = ocfs2_do_insert_extent(handle, et, &split_rec, &insert);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- if (do_leftright == 1) {
- u32 cpos;
- struct ocfs2_extent_list *el;
- do_leftright++;
- split_rec = *orig_split_rec;
- ocfs2_reinit_path(path, 1);
- cpos = le32_to_cpu(split_rec.e_cpos);
- ret = ocfs2_find_path(et->et_ci, path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- el = path_leaf_el(path);
- split_index = ocfs2_search_extent_list(el, cpos);
- if (split_index == -1) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu has an extent at cpos %u which can no longer be found\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- cpos);
- ret = -EROFS;
- goto out;
- }
- goto leftright;
- }
- out:
- return ret;
- }
- static int ocfs2_replace_extent_rec(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- struct ocfs2_extent_list *el,
- int split_index,
- struct ocfs2_extent_rec *split_rec)
- {
- int ret;
- ret = ocfs2_path_bh_journal_access(handle, et->et_ci, path,
- path_num_items(path) - 1);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- el->l_recs[split_index] = *split_rec;
- ocfs2_journal_dirty(handle, path_leaf_bh(path));
- out:
- return ret;
- }
- int ocfs2_split_extent(handle_t *handle,
- struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- int split_index,
- struct ocfs2_extent_rec *split_rec,
- struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
- {
- int ret = 0;
- struct ocfs2_extent_list *el = path_leaf_el(path);
- struct buffer_head *last_eb_bh = NULL;
- struct ocfs2_extent_rec *rec = &el->l_recs[split_index];
- struct ocfs2_merge_ctxt ctxt;
- struct ocfs2_extent_list *rightmost_el;
- if (le32_to_cpu(rec->e_cpos) > le32_to_cpu(split_rec->e_cpos) ||
- ((le32_to_cpu(rec->e_cpos) + le16_to_cpu(rec->e_leaf_clusters)) <
- (le32_to_cpu(split_rec->e_cpos) + le16_to_cpu(split_rec->e_leaf_clusters)))) {
- ret = -EIO;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_figure_merge_contig_type(et, path, el,
- split_index,
- split_rec,
- &ctxt);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- if (path->p_tree_depth) {
- struct ocfs2_extent_block *eb;
- ret = ocfs2_read_extent_block(et->et_ci,
- ocfs2_et_get_last_eb_blk(et),
- &last_eb_bh);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
- rightmost_el = &eb->h_list;
- } else
- rightmost_el = path_root_el(path);
- if (rec->e_cpos == split_rec->e_cpos &&
- rec->e_leaf_clusters == split_rec->e_leaf_clusters)
- ctxt.c_split_covers_rec = 1;
- else
- ctxt.c_split_covers_rec = 0;
- ctxt.c_has_empty_extent = ocfs2_is_empty_extent(&el->l_recs[0]);
- trace_ocfs2_split_extent(split_index, ctxt.c_contig_type,
- ctxt.c_has_empty_extent,
- ctxt.c_split_covers_rec);
- if (ctxt.c_contig_type == CONTIG_NONE) {
- if (ctxt.c_split_covers_rec)
- ret = ocfs2_replace_extent_rec(handle, et, path, el,
- split_index, split_rec);
- else
- ret = ocfs2_split_and_insert(handle, et, path,
- &last_eb_bh, split_index,
- split_rec, meta_ac);
- if (ret)
- mlog_errno(ret);
- } else {
- ret = ocfs2_try_to_merge_extent(handle, et, path,
- split_index, split_rec,
- dealloc, &ctxt);
- if (ret)
- mlog_errno(ret);
- }
- out:
- brelse(last_eb_bh);
- return ret;
- }
- 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);
- u64 start_blkno = ocfs2_clusters_to_blocks(sb, phys);
- struct ocfs2_extent_rec split_rec;
- struct ocfs2_path *left_path = NULL;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_rec *rec;
- left_path = ocfs2_new_path_from_et(et);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, left_path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- el = path_leaf_el(left_path);
- index = ocfs2_search_extent_list(el, cpos);
- if (index == -1) {
- ocfs2_error(sb,
- "Owner %llu has an extent at cpos %u which can no longer be found\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- cpos);
- ret = -EROFS;
- goto out;
- }
- ret = -EIO;
- rec = &el->l_recs[index];
- if (new_flags && (rec->e_flags & new_flags)) {
- mlog(ML_ERROR, "Owner %llu tried to set %d flags on an "
- "extent that already had them",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- new_flags);
- goto out;
- }
- if (clear_flags && !(rec->e_flags & clear_flags)) {
- mlog(ML_ERROR, "Owner %llu tried to clear %d flags on an "
- "extent that didn't have them",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- clear_flags);
- goto out;
- }
- memset(&split_rec, 0, sizeof(struct ocfs2_extent_rec));
- split_rec.e_cpos = cpu_to_le32(cpos);
- split_rec.e_leaf_clusters = cpu_to_le16(len);
- split_rec.e_blkno = cpu_to_le64(start_blkno);
- split_rec.e_flags = rec->e_flags;
- if (new_flags)
- split_rec.e_flags |= new_flags;
- if (clear_flags)
- split_rec.e_flags &= ~clear_flags;
- ret = ocfs2_split_extent(handle, et, left_path,
- index, &split_rec, meta_ac,
- dealloc);
- if (ret)
- mlog_errno(ret);
- out:
- ocfs2_free_path(left_path);
- return ret;
- }
- int ocfs2_mark_extent_written(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;
- trace_ocfs2_mark_extent_written(
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- cpos, len, phys);
- if (!ocfs2_writes_unwritten_extents(OCFS2_SB(inode->i_sb))) {
- ocfs2_error(inode->i_sb, "Inode %llu has unwritten extents that are being written to, but the feature bit is not set in the super block\n",
- (unsigned long long)OCFS2_I(inode)->ip_blkno);
- ret = -EROFS;
- goto out;
- }
-
- ocfs2_et_extent_map_truncate(et, 0);
- ret = ocfs2_change_extent_flag(handle, et, cpos,
- len, phys, meta_ac, dealloc,
- 0, OCFS2_EXT_UNWRITTEN);
- if (ret)
- mlog_errno(ret);
- out:
- return ret;
- }
- static int ocfs2_split_tree(handle_t *handle, struct ocfs2_extent_tree *et,
- struct ocfs2_path *path,
- int index, u32 new_range,
- struct ocfs2_alloc_context *meta_ac)
- {
- int ret, depth, credits;
- 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;
-
- el = path_leaf_el(path);
- rec = &el->l_recs[index];
- ocfs2_make_right_split_rec(ocfs2_metadata_cache_get_super(et->et_ci),
- &split_rec, new_range, rec);
- depth = path->p_tree_depth;
- if (depth > 0) {
- ret = ocfs2_read_extent_block(et->et_ci,
- ocfs2_et_get_last_eb_blk(et),
- &last_eb_bh);
- 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(et->et_root_el);
- 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)) {
- ret = ocfs2_grow_tree(handle, et, &depth, &last_eb_bh,
- meta_ac);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- 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_tree_depth = depth;
- ret = ocfs2_do_insert_extent(handle, et, &split_rec, &insert);
- if (ret)
- mlog_errno(ret);
- out:
- brelse(last_eb_bh);
- return ret;
- }
- static int ocfs2_truncate_rec(handle_t *handle,
- struct ocfs2_extent_tree *et,
- 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 is_rightmost_tree_rec = 0;
- struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci);
- 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_extend_rotate_transaction(handle, 0,
- handle->h_buffer_credits,
- path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_rotate_tree_left(handle, et, 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) {
-
- 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) {
-
- ret = ocfs2_find_cpos_for_left_leaf(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_from_path(path);
- if (!left_path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, 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(et->et_ci, handle, path);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_journal_access_path(et->et_ci, 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);
- next_free = le16_to_cpu(el->l_next_free_rec);
- if (is_rightmost_tree_rec && next_free > 1) {
-
- rec = &el->l_recs[next_free - 1];
- ocfs2_adjust_rightmost_records(handle, et, path,
- rec);
- }
- } else if (le32_to_cpu(rec->e_cpos) == cpos) {
-
- 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) {
-
- le16_add_cpu(&rec->e_leaf_clusters, -len);
- if (is_rightmost_tree_rec)
- ocfs2_adjust_rightmost_records(handle, et, path, rec);
- } else {
-
- mlog(ML_ERROR, "Owner %llu: Invalid record truncate: (%u, %u) "
- "(%u, %u)\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- 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(et, left_path, path);
- ocfs2_complete_edge_insert(handle, left_path, path,
- subtree_index);
- }
- ocfs2_journal_dirty(handle, path_leaf_bh(path));
- ret = ocfs2_rotate_tree_left(handle, et, path, dealloc);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- out:
- ocfs2_free_path(left_path);
- return ret;
- }
- int ocfs2_remove_extent(handle_t *handle,
- struct ocfs2_extent_tree *et,
- u32 cpos, u32 len,
- 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 = NULL;
-
- ocfs2_et_extent_map_truncate(et, 0);
- path = ocfs2_new_path_from_et(et);
- if (!path) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_find_path(et->et_ci, path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- el = path_leaf_el(path);
- index = ocfs2_search_extent_list(el, cpos);
- if (index == -1) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu has an extent at cpos %u which can no longer be found\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- cpos);
- ret = -EROFS;
- goto out;
- }
-
- 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);
- trace_ocfs2_remove_extent(
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- 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(handle, et, path, index, dealloc,
- cpos, len);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- } else {
- ret = ocfs2_split_tree(handle, et, path, index,
- trunc_range, meta_ac);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- ocfs2_reinit_path(path, 1);
- ret = ocfs2_find_path(et->et_ci, path, cpos);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- el = path_leaf_el(path);
- index = ocfs2_search_extent_list(el, cpos);
- if (index == -1) {
- ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu: split at cpos %u lost record\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- cpos);
- ret = -EROFS;
- goto out;
- }
-
- 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(ocfs2_metadata_cache_get_super(et->et_ci),
- "Owner %llu: error after split at cpos %u trunc len %u, existing record is (%u,%u)\n",
- (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
- cpos, len, le32_to_cpu(rec->e_cpos),
- ocfs2_rec_clusters(el, rec));
- ret = -EROFS;
- goto out;
- }
- ret = ocfs2_truncate_rec(handle, et, path, index, dealloc,
- cpos, len);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
- out:
- ocfs2_free_path(path);
- return ret;
- }
- static int ocfs2_reserve_blocks_for_rec_trunc(struct inode *inode,
- struct ocfs2_extent_tree *et,
- u32 extents_to_split,
- struct ocfs2_alloc_context **ac,
- int extra_blocks)
- {
- int ret = 0, num_free_extents;
- unsigned int max_recs_needed = 2 * extents_to_split;
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- *ac = NULL;
- num_free_extents = ocfs2_num_free_extents(osb, et);
- if (num_free_extents < 0) {
- ret = num_free_extents;
- mlog_errno(ret);
- goto out;
- }
- if (!num_free_extents ||
- (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed))
- extra_blocks += ocfs2_extend_meta_needed(et->et_root_el);
- if (extra_blocks) {
- ret = ocfs2_reserve_new_metadata_blocks(osb, extra_blocks, ac);
- if (ret < 0) {
- if (ret != -ENOSPC)
- mlog_errno(ret);
- goto out;
- }
- }
- out:
- if (ret) {
- if (*ac) {
- ocfs2_free_alloc_context(*ac);
- *ac = NULL;
- }
- }
- return ret;
- }
- int ocfs2_remove_btree_range(struct inode *inode,
- struct ocfs2_extent_tree *et,
- u32 cpos, u32 phys_cpos, u32 len, int flags,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- u64 refcount_loc, bool refcount_tree_locked)
- {
- int ret, credits = 0, extra_blocks = 0;
- u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- struct inode *tl_inode = osb->osb_tl_inode;
- handle_t *handle;
- struct ocfs2_alloc_context *meta_ac = NULL;
- struct ocfs2_refcount_tree *ref_tree = NULL;
- if ((flags & OCFS2_EXT_REFCOUNTED) && len) {
- BUG_ON(!(OCFS2_I(inode)->ip_dyn_features &
- OCFS2_HAS_REFCOUNT_FL));
- if (!refcount_tree_locked) {
- ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1,
- &ref_tree, NULL);
- if (ret) {
- mlog_errno(ret);
- goto bail;
- }
- }
- ret = ocfs2_prepare_refcount_change_for_del(inode,
- refcount_loc,
- phys_blkno,
- len,
- &credits,
- &extra_blocks);
- if (ret < 0) {
- mlog_errno(ret);
- goto bail;
- }
- }
- ret = ocfs2_reserve_blocks_for_rec_trunc(inode, et, 1, &meta_ac,
- extra_blocks);
- if (ret) {
- mlog_errno(ret);
- goto bail;
- }
- inode_lock(tl_inode);
- if (ocfs2_truncate_log_needs_flush(osb)) {
- ret = __ocfs2_flush_truncate_log(osb);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
- }
- handle = ocfs2_start_trans(osb,
- ocfs2_remove_extent_credits(osb->sb) + credits);
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_et_root_journal_access(handle, et,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out_commit;
- }
- dquot_free_space_nodirty(inode,
- ocfs2_clusters_to_bytes(inode->i_sb, len));
- ret = ocfs2_remove_extent(handle, et, cpos, len, meta_ac, dealloc);
- if (ret) {
- mlog_errno(ret);
- goto out_commit;
- }
- ocfs2_et_update_clusters(et, -len);
- ocfs2_update_inode_fsync_trans(handle, inode, 1);
- ocfs2_journal_dirty(handle, et->et_root_bh);
- if (phys_blkno) {
- if (flags & OCFS2_EXT_REFCOUNTED)
- ret = ocfs2_decrease_refcount(inode, handle,
- ocfs2_blocks_to_clusters(osb->sb,
- phys_blkno),
- len, meta_ac,
- dealloc, 1);
- else
- ret = ocfs2_truncate_log_append(osb, handle,
- phys_blkno, len);
- if (ret)
- mlog_errno(ret);
- }
- out_commit:
- ocfs2_commit_trans(osb, handle);
- out:
- inode_unlock(tl_inode);
- bail:
- if (meta_ac)
- ocfs2_free_alloc_context(meta_ac);
- if (ref_tree)
- ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
- 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;
- struct ocfs2_truncate_log *tl;
- di = (struct ocfs2_dinode *) tl_bh->b_data;
- tl = &di->id2.i_dealloc;
- mlog_bug_on_msg(le16_to_cpu(tl->tl_used) > le16_to_cpu(tl->tl_count),
- "slot %d, invalid truncate log parameters: used = "
- "%u, count = %u\n", osb->slot_num,
- le16_to_cpu(tl->tl_used), le16_to_cpu(tl->tl_count));
- return le16_to_cpu(tl->tl_used) == le16_to_cpu(tl->tl_count);
- }
- static int ocfs2_truncate_log_can_coalesce(struct ocfs2_truncate_log *tl,
- unsigned int new_start)
- {
- unsigned int tail_index;
- unsigned int current_tail;
-
- if (!le16_to_cpu(tl->tl_used))
- return 0;
- tail_index = le16_to_cpu(tl->tl_used) - 1;
- current_tail = le32_to_cpu(tl->tl_recs[tail_index].t_start);
- current_tail += le32_to_cpu(tl->tl_recs[tail_index].t_clusters);
- return current_tail == new_start;
- }
- 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;
- struct inode *tl_inode = osb->osb_tl_inode;
- struct buffer_head *tl_bh = osb->osb_tl_bh;
- struct ocfs2_dinode *di;
- struct ocfs2_truncate_log *tl;
- BUG_ON(inode_trylock(tl_inode));
- start_cluster = ocfs2_blocks_to_clusters(osb->sb, start_blk);
- di = (struct ocfs2_dinode *) tl_bh->b_data;
-
- BUG_ON(!OCFS2_IS_VALID_DINODE(di));
- tl = &di->id2.i_dealloc;
- tl_count = le16_to_cpu(tl->tl_count);
- mlog_bug_on_msg(tl_count > ocfs2_truncate_recs_per_inode(osb->sb) ||
- tl_count == 0,
- "Truncate record count on #%llu invalid "
- "wanted %u, actual %u\n",
- (unsigned long long)OCFS2_I(tl_inode)->ip_blkno,
- ocfs2_truncate_recs_per_inode(osb->sb),
- le16_to_cpu(tl->tl_count));
-
- index = le16_to_cpu(tl->tl_used);
- if (index >= tl_count) {
- status = -ENOSPC;
- mlog_errno(status);
- goto bail;
- }
- status = ocfs2_journal_access_di(handle, INODE_CACHE(tl_inode), tl_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- trace_ocfs2_truncate_log_append(
- (unsigned long long)OCFS2_I(tl_inode)->ip_blkno, index,
- start_cluster, num_clusters);
- if (ocfs2_truncate_log_can_coalesce(tl, start_cluster)) {
-
- index--;
- num_clusters += le32_to_cpu(tl->tl_recs[index].t_clusters);
- trace_ocfs2_truncate_log_append(
- (unsigned long long)OCFS2_I(tl_inode)->ip_blkno,
- index, le32_to_cpu(tl->tl_recs[index].t_start),
- num_clusters);
- } else {
- tl->tl_recs[index].t_start = cpu_to_le32(start_cluster);
- tl->tl_used = cpu_to_le16(index + 1);
- }
- tl->tl_recs[index].t_clusters = cpu_to_le32(num_clusters);
- ocfs2_journal_dirty(handle, tl_bh);
- osb->truncated_clusters += num_clusters;
- bail:
- return status;
- }
- static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
- struct inode *data_alloc_inode,
- struct buffer_head *data_alloc_bh)
- {
- int status = 0;
- int i;
- unsigned int num_clusters;
- u64 start_blk;
- struct ocfs2_truncate_rec rec;
- struct ocfs2_dinode *di;
- struct ocfs2_truncate_log *tl;
- struct inode *tl_inode = osb->osb_tl_inode;
- struct buffer_head *tl_bh = osb->osb_tl_bh;
- handle_t *handle;
- di = (struct ocfs2_dinode *) tl_bh->b_data;
- tl = &di->id2.i_dealloc;
- i = le16_to_cpu(tl->tl_used) - 1;
- while (i >= 0) {
- handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
- if (IS_ERR(handle)) {
- status = PTR_ERR(handle);
- mlog_errno(status);
- goto bail;
- }
-
- status = ocfs2_journal_access_di(handle, INODE_CACHE(tl_inode), tl_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- tl->tl_used = cpu_to_le16(i);
- ocfs2_journal_dirty(handle, tl_bh);
- rec = tl->tl_recs[i];
- start_blk = ocfs2_clusters_to_blocks(data_alloc_inode->i_sb,
- le32_to_cpu(rec.t_start));
- num_clusters = le32_to_cpu(rec.t_clusters);
-
- if (start_blk) {
- trace_ocfs2_replay_truncate_records(
- (unsigned long long)OCFS2_I(tl_inode)->ip_blkno,
- i, le32_to_cpu(rec.t_start), num_clusters);
- status = ocfs2_free_clusters(handle, data_alloc_inode,
- data_alloc_bh, start_blk,
- num_clusters);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- }
- ocfs2_commit_trans(osb, handle);
- i--;
- }
- osb->truncated_clusters = 0;
- bail:
- return status;
- }
- int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
- {
- int status;
- unsigned int num_to_flush;
- struct inode *tl_inode = osb->osb_tl_inode;
- struct inode *data_alloc_inode = NULL;
- struct buffer_head *tl_bh = osb->osb_tl_bh;
- struct buffer_head *data_alloc_bh = NULL;
- struct ocfs2_dinode *di;
- struct ocfs2_truncate_log *tl;
- BUG_ON(inode_trylock(tl_inode));
- di = (struct ocfs2_dinode *) tl_bh->b_data;
-
- BUG_ON(!OCFS2_IS_VALID_DINODE(di));
- tl = &di->id2.i_dealloc;
- num_to_flush = le16_to_cpu(tl->tl_used);
- trace_ocfs2_flush_truncate_log(
- (unsigned long long)OCFS2_I(tl_inode)->ip_blkno,
- num_to_flush);
- if (!num_to_flush) {
- status = 0;
- goto out;
- }
- data_alloc_inode = ocfs2_get_system_file_inode(osb,
- GLOBAL_BITMAP_SYSTEM_INODE,
- OCFS2_INVALID_SLOT);
- if (!data_alloc_inode) {
- status = -EINVAL;
- mlog(ML_ERROR, "Could not get bitmap inode!\n");
- goto out;
- }
- inode_lock(data_alloc_inode);
- status = ocfs2_inode_lock(data_alloc_inode, &data_alloc_bh, 1);
- if (status < 0) {
- mlog_errno(status);
- goto out_mutex;
- }
- status = ocfs2_replay_truncate_records(osb, data_alloc_inode,
- data_alloc_bh);
- if (status < 0)
- mlog_errno(status);
- brelse(data_alloc_bh);
- ocfs2_inode_unlock(data_alloc_inode, 1);
- out_mutex:
- inode_unlock(data_alloc_inode);
- iput(data_alloc_inode);
- out:
- return status;
- }
- int ocfs2_flush_truncate_log(struct ocfs2_super *osb)
- {
- int status;
- struct inode *tl_inode = osb->osb_tl_inode;
- inode_lock(tl_inode);
- status = __ocfs2_flush_truncate_log(osb);
- inode_unlock(tl_inode);
- return status;
- }
- static void ocfs2_truncate_log_worker(struct work_struct *work)
- {
- int status;
- struct ocfs2_super *osb =
- container_of(work, struct ocfs2_super,
- osb_truncate_log_wq.work);
- status = ocfs2_flush_truncate_log(osb);
- if (status < 0)
- mlog_errno(status);
- else
- ocfs2_init_steal_slots(osb);
- }
- #define OCFS2_TRUNCATE_LOG_FLUSH_INTERVAL (2 * HZ)
- void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb,
- int cancel)
- {
- if (osb->osb_tl_inode &&
- atomic_read(&osb->osb_tl_disable) == 0) {
-
- if (cancel)
- cancel_delayed_work(&osb->osb_truncate_log_wq);
- queue_delayed_work(osb->ocfs2_wq, &osb->osb_truncate_log_wq,
- OCFS2_TRUNCATE_LOG_FLUSH_INTERVAL);
- }
- }
- int ocfs2_try_to_free_truncate_log(struct ocfs2_super *osb,
- unsigned int needed)
- {
- tid_t target;
- int ret = 0;
- unsigned int truncated_clusters;
- inode_lock(osb->osb_tl_inode);
- truncated_clusters = osb->truncated_clusters;
- inode_unlock(osb->osb_tl_inode);
-
- if (truncated_clusters < needed)
- goto out;
- ret = ocfs2_flush_truncate_log(osb);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- if (jbd2_journal_start_commit(osb->journal->j_journal, &target)) {
- jbd2_log_wait_commit(osb->journal->j_journal, target);
- ret = 1;
- }
- out:
- return ret;
- }
- static int ocfs2_get_truncate_log_info(struct ocfs2_super *osb,
- int slot_num,
- struct inode **tl_inode,
- struct buffer_head **tl_bh)
- {
- int status;
- struct inode *inode = NULL;
- struct buffer_head *bh = NULL;
- inode = ocfs2_get_system_file_inode(osb,
- TRUNCATE_LOG_SYSTEM_INODE,
- slot_num);
- if (!inode) {
- status = -EINVAL;
- mlog(ML_ERROR, "Could not get load truncate log inode!\n");
- goto bail;
- }
- status = ocfs2_read_inode_block(inode, &bh);
- if (status < 0) {
- iput(inode);
- mlog_errno(status);
- goto bail;
- }
- *tl_inode = inode;
- *tl_bh = bh;
- bail:
- return status;
- }
- int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb,
- int slot_num,
- struct ocfs2_dinode **tl_copy)
- {
- int status;
- struct inode *tl_inode = NULL;
- struct buffer_head *tl_bh = NULL;
- struct ocfs2_dinode *di;
- struct ocfs2_truncate_log *tl;
- *tl_copy = NULL;
- trace_ocfs2_begin_truncate_log_recovery(slot_num);
- status = ocfs2_get_truncate_log_info(osb, slot_num, &tl_inode, &tl_bh);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- di = (struct ocfs2_dinode *) tl_bh->b_data;
-
- BUG_ON(!OCFS2_IS_VALID_DINODE(di));
- tl = &di->id2.i_dealloc;
- if (le16_to_cpu(tl->tl_used)) {
- trace_ocfs2_truncate_log_recovery_num(le16_to_cpu(tl->tl_used));
- *tl_copy = kmalloc(tl_bh->b_size, GFP_KERNEL);
- if (!(*tl_copy)) {
- status = -ENOMEM;
- mlog_errno(status);
- goto bail;
- }
-
- memcpy(*tl_copy, tl_bh->b_data, tl_bh->b_size);
-
- tl->tl_used = 0;
- ocfs2_compute_meta_ecc(osb->sb, tl_bh->b_data, &di->i_check);
- status = ocfs2_write_block(osb, tl_bh, INODE_CACHE(tl_inode));
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- }
- bail:
- iput(tl_inode);
- brelse(tl_bh);
- if (status < 0) {
- kfree(*tl_copy);
- *tl_copy = NULL;
- mlog_errno(status);
- }
- return status;
- }
- int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
- struct ocfs2_dinode *tl_copy)
- {
- int status = 0;
- int i;
- unsigned int clusters, num_recs, start_cluster;
- u64 start_blk;
- handle_t *handle;
- struct inode *tl_inode = osb->osb_tl_inode;
- struct ocfs2_truncate_log *tl;
- if (OCFS2_I(tl_inode)->ip_blkno == le64_to_cpu(tl_copy->i_blkno)) {
- mlog(ML_ERROR, "Asked to recover my own truncate log!\n");
- return -EINVAL;
- }
- tl = &tl_copy->id2.i_dealloc;
- num_recs = le16_to_cpu(tl->tl_used);
- trace_ocfs2_complete_truncate_log_recovery(
- (unsigned long long)le64_to_cpu(tl_copy->i_blkno),
- num_recs);
- inode_lock(tl_inode);
- for(i = 0; i < num_recs; i++) {
- if (ocfs2_truncate_log_needs_flush(osb)) {
- status = __ocfs2_flush_truncate_log(osb);
- if (status < 0) {
- mlog_errno(status);
- goto bail_up;
- }
- }
- handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_UPDATE);
- if (IS_ERR(handle)) {
- status = PTR_ERR(handle);
- mlog_errno(status);
- goto bail_up;
- }
- clusters = le32_to_cpu(tl->tl_recs[i].t_clusters);
- start_cluster = le32_to_cpu(tl->tl_recs[i].t_start);
- start_blk = ocfs2_clusters_to_blocks(osb->sb, start_cluster);
- status = ocfs2_truncate_log_append(osb, handle,
- start_blk, clusters);
- ocfs2_commit_trans(osb, handle);
- if (status < 0) {
- mlog_errno(status);
- goto bail_up;
- }
- }
- bail_up:
- inode_unlock(tl_inode);
- return status;
- }
- void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb)
- {
- int status;
- struct inode *tl_inode = osb->osb_tl_inode;
- atomic_set(&osb->osb_tl_disable, 1);
- if (tl_inode) {
- cancel_delayed_work(&osb->osb_truncate_log_wq);
- flush_workqueue(osb->ocfs2_wq);
- status = ocfs2_flush_truncate_log(osb);
- if (status < 0)
- mlog_errno(status);
- brelse(osb->osb_tl_bh);
- iput(osb->osb_tl_inode);
- }
- }
- int ocfs2_truncate_log_init(struct ocfs2_super *osb)
- {
- int status;
- struct inode *tl_inode = NULL;
- struct buffer_head *tl_bh = NULL;
- status = ocfs2_get_truncate_log_info(osb,
- osb->slot_num,
- &tl_inode,
- &tl_bh);
- if (status < 0)
- mlog_errno(status);
-
- INIT_DELAYED_WORK(&osb->osb_truncate_log_wq,
- ocfs2_truncate_log_worker);
- atomic_set(&osb->osb_tl_disable, 0);
- osb->osb_tl_bh = tl_bh;
- osb->osb_tl_inode = tl_inode;
- return status;
- }
- struct ocfs2_cached_block_free {
- struct ocfs2_cached_block_free *free_next;
- u64 free_bg;
- u64 free_blk;
- unsigned int free_bit;
- };
- struct ocfs2_per_slot_free_list {
- struct ocfs2_per_slot_free_list *f_next_suballocator;
- int f_inode_type;
- int f_slot;
- struct ocfs2_cached_block_free *f_first;
- };
- static int ocfs2_free_cached_blocks(struct ocfs2_super *osb,
- int sysfile_type,
- int slot,
- struct ocfs2_cached_block_free *head)
- {
- int ret;
- u64 bg_blkno;
- handle_t *handle;
- struct inode *inode;
- struct buffer_head *di_bh = NULL;
- struct ocfs2_cached_block_free *tmp;
- inode = ocfs2_get_system_file_inode(osb, sysfile_type, slot);
- if (!inode) {
- ret = -EINVAL;
- mlog_errno(ret);
- goto out;
- }
- inode_lock(inode);
- ret = ocfs2_inode_lock(inode, &di_bh, 1);
- if (ret) {
- mlog_errno(ret);
- goto out_mutex;
- }
- while (head) {
- if (head->free_bg)
- bg_blkno = head->free_bg;
- else
- bg_blkno = ocfs2_which_suballoc_group(head->free_blk,
- head->free_bit);
- handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- mlog_errno(ret);
- goto out_unlock;
- }
- trace_ocfs2_free_cached_blocks(
- (unsigned long long)head->free_blk, head->free_bit);
- ret = ocfs2_free_suballoc_bits(handle, inode, di_bh,
- head->free_bit, bg_blkno, 1);
- if (ret)
- mlog_errno(ret);
- ocfs2_commit_trans(osb, handle);
- tmp = head;
- head = head->free_next;
- kfree(tmp);
- }
- out_unlock:
- ocfs2_inode_unlock(inode, 1);
- brelse(di_bh);
- out_mutex:
- inode_unlock(inode);
- iput(inode);
- out:
- while(head) {
-
- tmp = head;
- head = head->free_next;
- kfree(tmp);
- }
- return ret;
- }
- int ocfs2_cache_cluster_dealloc(struct ocfs2_cached_dealloc_ctxt *ctxt,
- u64 blkno, unsigned int bit)
- {
- int ret = 0;
- struct ocfs2_cached_block_free *item;
- item = kzalloc(sizeof(*item), GFP_NOFS);
- if (item == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- return ret;
- }
- trace_ocfs2_cache_cluster_dealloc((unsigned long long)blkno, bit);
- item->free_blk = blkno;
- item->free_bit = bit;
- item->free_next = ctxt->c_global_allocator;
- ctxt->c_global_allocator = item;
- return ret;
- }
- static int ocfs2_free_cached_clusters(struct ocfs2_super *osb,
- struct ocfs2_cached_block_free *head)
- {
- struct ocfs2_cached_block_free *tmp;
- struct inode *tl_inode = osb->osb_tl_inode;
- handle_t *handle;
- int ret = 0;
- inode_lock(tl_inode);
- while (head) {
- if (ocfs2_truncate_log_needs_flush(osb)) {
- ret = __ocfs2_flush_truncate_log(osb);
- if (ret < 0) {
- mlog_errno(ret);
- break;
- }
- }
- handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_UPDATE);
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- mlog_errno(ret);
- break;
- }
- ret = ocfs2_truncate_log_append(osb, handle, head->free_blk,
- head->free_bit);
- ocfs2_commit_trans(osb, handle);
- tmp = head;
- head = head->free_next;
- kfree(tmp);
- if (ret < 0) {
- mlog_errno(ret);
- break;
- }
- }
- inode_unlock(tl_inode);
- while (head) {
-
- tmp = head;
- head = head->free_next;
- kfree(tmp);
- }
- return ret;
- }
- int ocfs2_run_deallocs(struct ocfs2_super *osb,
- struct ocfs2_cached_dealloc_ctxt *ctxt)
- {
- int ret = 0, ret2;
- struct ocfs2_per_slot_free_list *fl;
- if (!ctxt)
- return 0;
- while (ctxt->c_first_suballocator) {
- fl = ctxt->c_first_suballocator;
- if (fl->f_first) {
- trace_ocfs2_run_deallocs(fl->f_inode_type,
- fl->f_slot);
- ret2 = ocfs2_free_cached_blocks(osb,
- fl->f_inode_type,
- fl->f_slot,
- fl->f_first);
- if (ret2)
- mlog_errno(ret2);
- if (!ret)
- ret = ret2;
- }
- ctxt->c_first_suballocator = fl->f_next_suballocator;
- kfree(fl);
- }
- if (ctxt->c_global_allocator) {
- ret2 = ocfs2_free_cached_clusters(osb,
- ctxt->c_global_allocator);
- if (ret2)
- mlog_errno(ret2);
- if (!ret)
- ret = ret2;
- ctxt->c_global_allocator = NULL;
- }
- return ret;
- }
- static struct ocfs2_per_slot_free_list *
- ocfs2_find_per_slot_free_list(int type,
- int slot,
- struct ocfs2_cached_dealloc_ctxt *ctxt)
- {
- struct ocfs2_per_slot_free_list *fl = ctxt->c_first_suballocator;
- while (fl) {
- if (fl->f_inode_type == type && fl->f_slot == slot)
- return fl;
- fl = fl->f_next_suballocator;
- }
- fl = kmalloc(sizeof(*fl), GFP_NOFS);
- if (fl) {
- fl->f_inode_type = type;
- fl->f_slot = slot;
- fl->f_first = NULL;
- fl->f_next_suballocator = ctxt->c_first_suballocator;
- ctxt->c_first_suballocator = fl;
- }
- return fl;
- }
- int ocfs2_cache_block_dealloc(struct ocfs2_cached_dealloc_ctxt *ctxt,
- int type, int slot, u64 suballoc,
- u64 blkno, unsigned int bit)
- {
- int ret;
- struct ocfs2_per_slot_free_list *fl;
- struct ocfs2_cached_block_free *item;
- fl = ocfs2_find_per_slot_free_list(type, slot, ctxt);
- if (fl == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- item = kzalloc(sizeof(*item), GFP_NOFS);
- if (item == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- trace_ocfs2_cache_block_dealloc(type, slot,
- (unsigned long long)suballoc,
- (unsigned long long)blkno, bit);
- item->free_bg = suballoc;
- item->free_blk = blkno;
- item->free_bit = bit;
- item->free_next = fl->f_first;
- fl->f_first = item;
- ret = 0;
- out:
- return ret;
- }
- static int ocfs2_cache_extent_block_free(struct ocfs2_cached_dealloc_ctxt *ctxt,
- struct ocfs2_extent_block *eb)
- {
- return ocfs2_cache_block_dealloc(ctxt, EXTENT_ALLOC_SYSTEM_INODE,
- le16_to_cpu(eb->h_suballoc_slot),
- le64_to_cpu(eb->h_suballoc_loc),
- le64_to_cpu(eb->h_blkno),
- le16_to_cpu(eb->h_suballoc_bit));
- }
- static int ocfs2_zero_func(handle_t *handle, struct buffer_head *bh)
- {
- set_buffer_uptodate(bh);
- mark_buffer_dirty(bh);
- return 0;
- }
- void ocfs2_map_and_dirty_page(struct inode *inode, handle_t *handle,
- unsigned int from, unsigned int to,
- struct page *page, int zero, u64 *phys)
- {
- int ret, partial = 0;
- ret = ocfs2_map_page_blocks(page, phys, inode, from, to, 0);
- if (ret)
- mlog_errno(ret);
- if (zero)
- zero_user_segment(page, from, to);
-
- ret = walk_page_buffers(handle, page_buffers(page),
- from, to, &partial,
- ocfs2_zero_func);
- if (ret < 0)
- mlog_errno(ret);
- else if (ocfs2_should_order_data(inode)) {
- ret = ocfs2_jbd2_file_inode(handle, inode);
- if (ret < 0)
- mlog_errno(ret);
- }
- if (!partial)
- SetPageUptodate(page);
- flush_dcache_page(page);
- }
- 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;
- struct page *page;
- unsigned int from, to = PAGE_SIZE;
- struct super_block *sb = inode->i_sb;
- BUG_ON(!ocfs2_sparse_alloc(OCFS2_SB(sb)));
- if (numpages == 0)
- goto out;
- to = PAGE_SIZE;
- for(i = 0; i < numpages; i++) {
- page = pages[i];
- from = start & (PAGE_SIZE - 1);
- if ((end >> PAGE_SHIFT) == page->index)
- to = end & (PAGE_SIZE - 1);
- BUG_ON(from > PAGE_SIZE);
- BUG_ON(to > PAGE_SIZE);
- ocfs2_map_and_dirty_page(inode, handle, from, to, page, 1,
- &phys);
- start = (page->index + 1) << PAGE_SHIFT;
- }
- out:
- if (pages)
- ocfs2_unlock_and_free_pages(pages, numpages);
- }
- int ocfs2_grab_pages(struct inode *inode, loff_t start, loff_t end,
- struct page **pages, int *num)
- {
- int numpages, ret = 0;
- struct address_space *mapping = inode->i_mapping;
- unsigned long index;
- loff_t last_page_bytes;
- BUG_ON(start > end);
- numpages = 0;
- last_page_bytes = PAGE_ALIGN(end);
- index = start >> PAGE_SHIFT;
- do {
- pages[numpages] = find_or_create_page(mapping, index, GFP_NOFS);
- if (!pages[numpages]) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- numpages++;
- index++;
- } while (index < (last_page_bytes >> PAGE_SHIFT));
- out:
- if (ret != 0) {
- if (pages)
- ocfs2_unlock_and_free_pages(pages, numpages);
- numpages = 0;
- }
- *num = numpages;
- return ret;
- }
- static int ocfs2_grab_eof_pages(struct inode *inode, loff_t start, loff_t end,
- struct page **pages, int *num)
- {
- struct super_block *sb = inode->i_sb;
- BUG_ON(start >> OCFS2_SB(sb)->s_clustersize_bits !=
- (end - 1) >> OCFS2_SB(sb)->s_clustersize_bits);
- return ocfs2_grab_pages(inode, start, end, pages, num);
- }
- int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle,
- u64 range_start, u64 range_end)
- {
- int ret = 0, numpages;
- struct page **pages = NULL;
- u64 phys;
- unsigned int ext_flags;
- struct super_block *sb = inode->i_sb;
-
- if (!ocfs2_sparse_alloc(OCFS2_SB(sb)))
- return 0;
- pages = kcalloc(ocfs2_pages_per_cluster(sb),
- sizeof(struct page *), GFP_NOFS);
- if (pages == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- goto out;
- }
- if (range_start == range_end)
- goto out;
- ret = ocfs2_extent_map_get_blocks(inode,
- range_start >> sb->s_blocksize_bits,
- &phys, NULL, &ext_flags);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
- if (phys == 0 || ext_flags & OCFS2_EXT_UNWRITTEN)
- goto out;
- ret = ocfs2_grab_eof_pages(inode, range_start, range_end, pages,
- &numpages);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- ocfs2_zero_cluster_pages(inode, range_start, range_end, pages,
- numpages, phys, handle);
-
- ret = filemap_fdatawrite_range(inode->i_mapping, range_start,
- range_end - 1);
- if (ret)
- mlog_errno(ret);
- out:
- kfree(pages);
- return ret;
- }
- static void ocfs2_zero_dinode_id2_with_xattr(struct inode *inode,
- struct ocfs2_dinode *di)
- {
- unsigned int blocksize = 1 << inode->i_sb->s_blocksize_bits;
- unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);
- if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)
- memset(&di->id2, 0, blocksize -
- offsetof(struct ocfs2_dinode, id2) -
- xattrsize);
- else
- memset(&di->id2, 0, blocksize -
- offsetof(struct ocfs2_dinode, id2));
- }
- void ocfs2_dinode_new_extent_list(struct inode *inode,
- struct ocfs2_dinode *di)
- {
- ocfs2_zero_dinode_id2_with_xattr(inode, di);
- di->id2.i_list.l_tree_depth = 0;
- di->id2.i_list.l_next_free_rec = 0;
- di->id2.i_list.l_count = cpu_to_le16(
- ocfs2_extent_recs_per_inode_with_xattr(inode->i_sb, di));
- }
- void ocfs2_set_inode_data_inline(struct inode *inode, struct ocfs2_dinode *di)
- {
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
- struct ocfs2_inline_data *idata = &di->id2.i_data;
- spin_lock(&oi->ip_lock);
- oi->ip_dyn_features |= OCFS2_INLINE_DATA_FL;
- di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
- spin_unlock(&oi->ip_lock);
-
- ocfs2_zero_dinode_id2_with_xattr(inode, di);
- idata->id_count = cpu_to_le16(
- ocfs2_max_inline_data_with_xattr(inode->i_sb, di));
- }
- int ocfs2_convert_inline_data_to_extents(struct inode *inode,
- struct buffer_head *di_bh)
- {
- int ret, i, has_data, num_pages = 0;
- int need_free = 0;
- u32 bit_off, num;
- handle_t *handle;
- u64 uninitialized_var(block);
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
- struct ocfs2_alloc_context *data_ac = NULL;
- struct page **pages = NULL;
- loff_t end = osb->s_clustersize;
- struct ocfs2_extent_tree et;
- int did_quota = 0;
- has_data = i_size_read(inode) ? 1 : 0;
- if (has_data) {
- pages = kcalloc(ocfs2_pages_per_cluster(osb->sb),
- sizeof(struct page *), GFP_NOFS);
- if (pages == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- return ret;
- }
- ret = ocfs2_reserve_clusters(osb, 1, &data_ac);
- if (ret) {
- mlog_errno(ret);
- goto free_pages;
- }
- }
- handle = ocfs2_start_trans(osb,
- ocfs2_inline_to_extents_credits(osb->sb));
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out_commit;
- }
- if (has_data) {
- unsigned int page_end;
- u64 phys;
- ret = dquot_alloc_space_nodirty(inode,
- ocfs2_clusters_to_bytes(osb->sb, 1));
- if (ret)
- goto out_commit;
- did_quota = 1;
- data_ac->ac_resv = &OCFS2_I(inode)->ip_la_data_resv;
- ret = ocfs2_claim_clusters(handle, data_ac, 1, &bit_off,
- &num);
- if (ret) {
- mlog_errno(ret);
- goto out_commit;
- }
-
- block = phys = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
-
- if (!ocfs2_sparse_alloc(osb) &&
- PAGE_SIZE < osb->s_clustersize)
- end = PAGE_SIZE;
- ret = ocfs2_grab_eof_pages(inode, 0, end, pages, &num_pages);
- if (ret) {
- mlog_errno(ret);
- need_free = 1;
- goto out_commit;
- }
-
- ret = ocfs2_read_inline_data(inode, pages[0], di_bh);
- if (ret) {
- mlog_errno(ret);
- need_free = 1;
- goto out_unlock;
- }
- page_end = PAGE_SIZE;
- if (PAGE_SIZE > osb->s_clustersize)
- page_end = osb->s_clustersize;
- for (i = 0; i < num_pages; i++)
- ocfs2_map_and_dirty_page(inode, handle, 0, page_end,
- pages[i], i > 0, &phys);
- }
- spin_lock(&oi->ip_lock);
- oi->ip_dyn_features &= ~OCFS2_INLINE_DATA_FL;
- di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
- spin_unlock(&oi->ip_lock);
- ocfs2_update_inode_fsync_trans(handle, inode, 1);
- ocfs2_dinode_new_extent_list(inode, di);
- ocfs2_journal_dirty(handle, di_bh);
- if (has_data) {
-
- ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
- ret = ocfs2_insert_extent(handle, &et, 0, block, 1, 0, NULL);
- if (ret) {
- mlog_errno(ret);
- need_free = 1;
- goto out_unlock;
- }
- inode->i_blocks = ocfs2_inode_sector_count(inode);
- }
- out_unlock:
- if (pages)
- ocfs2_unlock_and_free_pages(pages, num_pages);
- out_commit:
- if (ret < 0 && did_quota)
- dquot_free_space_nodirty(inode,
- ocfs2_clusters_to_bytes(osb->sb, 1));
- if (need_free) {
- if (data_ac->ac_which == OCFS2_AC_USE_LOCAL)
- ocfs2_free_local_alloc_bits(osb, handle, data_ac,
- bit_off, num);
- else
- ocfs2_free_clusters(handle,
- data_ac->ac_inode,
- data_ac->ac_bh,
- ocfs2_clusters_to_blocks(osb->sb, bit_off),
- num);
- }
- ocfs2_commit_trans(osb, handle);
- out:
- if (data_ac)
- ocfs2_free_alloc_context(data_ac);
- free_pages:
- kfree(pages);
- return ret;
- }
- int ocfs2_commit_truncate(struct ocfs2_super *osb,
- struct inode *inode,
- struct buffer_head *di_bh)
- {
- int status = 0, i, flags = 0;
- u32 new_highest_cpos, range, trunc_cpos, trunc_len, phys_cpos, coff;
- u64 blkno = 0;
- struct ocfs2_extent_list *el;
- struct ocfs2_extent_rec *rec;
- struct ocfs2_path *path = NULL;
- struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
- struct ocfs2_extent_list *root_el = &(di->id2.i_list);
- u64 refcount_loc = le64_to_cpu(di->i_refcount_loc);
- struct ocfs2_extent_tree et;
- struct ocfs2_cached_dealloc_ctxt dealloc;
- struct ocfs2_refcount_tree *ref_tree = NULL;
- ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
- ocfs2_init_dealloc_ctxt(&dealloc);
- new_highest_cpos = ocfs2_clusters_for_bytes(osb->sb,
- i_size_read(inode));
- path = ocfs2_new_path(di_bh, &di->id2.i_list,
- ocfs2_journal_access_di);
- if (!path) {
- status = -ENOMEM;
- mlog_errno(status);
- goto bail;
- }
- ocfs2_extent_map_trunc(inode, new_highest_cpos);
- start:
-
- if (OCFS2_I(inode)->ip_clusters == 0) {
- status = 0;
- goto bail;
- }
-
- status = ocfs2_find_path(INODE_CACHE(inode), path, UINT_MAX);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
- trace_ocfs2_commit_truncate(
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- new_highest_cpos,
- OCFS2_I(inode)->ip_clusters,
- path->p_tree_depth);
-
- el = path_leaf_el(path);
- if (le16_to_cpu(el->l_next_free_rec) == 0) {
- ocfs2_error(inode->i_sb,
- "Inode %llu has empty extent block at %llu\n",
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- (unsigned long long)path_leaf_bh(path)->b_blocknr);
- status = -EROFS;
- goto bail;
- }
- i = le16_to_cpu(el->l_next_free_rec) - 1;
- rec = &el->l_recs[i];
- flags = rec->e_flags;
- range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
- if (i == 0 && ocfs2_is_empty_extent(rec)) {
-
- if (root_el->l_tree_depth && rec->e_int_clusters == 0) {
- mlog(ML_ERROR, "Inode %lu has an empty "
- "extent record, depth %u\n", inode->i_ino,
- le16_to_cpu(root_el->l_tree_depth));
- status = ocfs2_remove_rightmost_empty_extent(osb,
- &et, path, &dealloc);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
- ocfs2_reinit_path(path, 1);
- goto start;
- } else {
- trunc_cpos = le32_to_cpu(rec->e_cpos);
- trunc_len = 0;
- blkno = 0;
- }
- } else if (le32_to_cpu(rec->e_cpos) >= new_highest_cpos) {
-
- trunc_cpos = le32_to_cpu(rec->e_cpos);
- trunc_len = ocfs2_rec_clusters(el, rec);
- blkno = le64_to_cpu(rec->e_blkno);
- } else if (range > new_highest_cpos) {
-
- trunc_cpos = new_highest_cpos;
- trunc_len = range - new_highest_cpos;
- coff = new_highest_cpos - le32_to_cpu(rec->e_cpos);
- blkno = le64_to_cpu(rec->e_blkno) +
- ocfs2_clusters_to_blocks(inode->i_sb, coff);
- } else {
-
- status = 0;
- goto bail;
- }
- phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
- if ((flags & OCFS2_EXT_REFCOUNTED) && trunc_len && !ref_tree) {
- status = ocfs2_lock_refcount_tree(osb, refcount_loc, 1,
- &ref_tree, NULL);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
- }
- status = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
- phys_cpos, trunc_len, flags, &dealloc,
- refcount_loc, true);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- ocfs2_reinit_path(path, 1);
-
- goto start;
- bail:
- if (ref_tree)
- ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
- ocfs2_schedule_truncate_log_flush(osb, 1);
- ocfs2_run_deallocs(osb, &dealloc);
- ocfs2_free_path(path);
- return status;
- }
- int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh,
- unsigned int start, unsigned int end, int trunc)
- {
- int ret;
- unsigned int numbytes;
- handle_t *handle;
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
- struct ocfs2_inline_data *idata = &di->id2.i_data;
- if (end > i_size_read(inode))
- end = i_size_read(inode);
- BUG_ON(start > end);
- if (!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) ||
- !(le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_DATA_FL) ||
- !ocfs2_supports_inline_data(osb)) {
- ocfs2_error(inode->i_sb,
- "Inline data flags for inode %llu don't agree! Disk: 0x%x, Memory: 0x%x, Superblock: 0x%x\n",
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- le16_to_cpu(di->i_dyn_features),
- OCFS2_I(inode)->ip_dyn_features,
- osb->s_feature_incompat);
- ret = -EROFS;
- goto out;
- }
- handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- mlog_errno(ret);
- goto out;
- }
- ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out_commit;
- }
- numbytes = end - start;
- memset(idata->id_data + start, 0, numbytes);
-
- if (trunc) {
- i_size_write(inode, start);
- di->i_size = cpu_to_le64(start);
- }
- inode->i_blocks = ocfs2_inode_sector_count(inode);
- inode->i_ctime = inode->i_mtime = current_time(inode);
- di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
- di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
- ocfs2_update_inode_fsync_trans(handle, inode, 1);
- ocfs2_journal_dirty(handle, di_bh);
- out_commit:
- ocfs2_commit_trans(osb, handle);
- out:
- return ret;
- }
- static int ocfs2_trim_extent(struct super_block *sb,
- struct ocfs2_group_desc *gd,
- u64 group, u32 start, u32 count)
- {
- u64 discard, bcount;
- struct ocfs2_super *osb = OCFS2_SB(sb);
- bcount = ocfs2_clusters_to_blocks(sb, count);
- discard = ocfs2_clusters_to_blocks(sb, start);
-
- if (group != osb->first_cluster_group_blkno)
- discard += le64_to_cpu(gd->bg_blkno);
- trace_ocfs2_trim_extent(sb, (unsigned long long)discard, bcount);
- return sb_issue_discard(sb, discard, bcount, GFP_NOFS, 0);
- }
- static int ocfs2_trim_group(struct super_block *sb,
- struct ocfs2_group_desc *gd, u64 group,
- u32 start, u32 max, u32 minbits)
- {
- int ret = 0, count = 0, next;
- void *bitmap = gd->bg_bitmap;
- if (le16_to_cpu(gd->bg_free_bits_count) < minbits)
- return 0;
- trace_ocfs2_trim_group((unsigned long long)le64_to_cpu(gd->bg_blkno),
- start, max, minbits);
- while (start < max) {
- start = ocfs2_find_next_zero_bit(bitmap, max, start);
- if (start >= max)
- break;
- next = ocfs2_find_next_bit(bitmap, max, start);
- if ((next - start) >= minbits) {
- ret = ocfs2_trim_extent(sb, gd, group,
- start, next - start);
- if (ret < 0) {
- mlog_errno(ret);
- break;
- }
- count += next - start;
- }
- start = next + 1;
- if (fatal_signal_pending(current)) {
- count = -ERESTARTSYS;
- break;
- }
- if ((le16_to_cpu(gd->bg_free_bits_count) - count) < minbits)
- break;
- }
- if (ret < 0)
- count = ret;
- return count;
- }
- int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
- {
- struct ocfs2_super *osb = OCFS2_SB(sb);
- u64 start, len, trimmed, first_group, last_group, group;
- int ret, cnt;
- u32 first_bit, last_bit, minlen;
- struct buffer_head *main_bm_bh = NULL;
- struct inode *main_bm_inode = NULL;
- struct buffer_head *gd_bh = NULL;
- struct ocfs2_dinode *main_bm;
- struct ocfs2_group_desc *gd = NULL;
- start = range->start >> osb->s_clustersize_bits;
- len = range->len >> osb->s_clustersize_bits;
- minlen = range->minlen >> osb->s_clustersize_bits;
- if (minlen >= osb->bitmap_cpg || range->len < sb->s_blocksize)
- return -EINVAL;
- main_bm_inode = ocfs2_get_system_file_inode(osb,
- GLOBAL_BITMAP_SYSTEM_INODE,
- OCFS2_INVALID_SLOT);
- if (!main_bm_inode) {
- ret = -EIO;
- mlog_errno(ret);
- goto out;
- }
- inode_lock(main_bm_inode);
- ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 0);
- if (ret < 0) {
- mlog_errno(ret);
- goto out_mutex;
- }
- main_bm = (struct ocfs2_dinode *)main_bm_bh->b_data;
- if (start >= le32_to_cpu(main_bm->i_clusters)) {
- ret = -EINVAL;
- goto out_unlock;
- }
- len = range->len >> osb->s_clustersize_bits;
- if (start + len > le32_to_cpu(main_bm->i_clusters))
- len = le32_to_cpu(main_bm->i_clusters) - start;
- trace_ocfs2_trim_fs(start, len, minlen);
-
- first_group = ocfs2_which_cluster_group(main_bm_inode, start);
- if (first_group == osb->first_cluster_group_blkno)
- first_bit = start;
- else
- first_bit = start - ocfs2_blocks_to_clusters(sb, first_group);
- last_group = ocfs2_which_cluster_group(main_bm_inode, start + len - 1);
- last_bit = osb->bitmap_cpg;
- trimmed = 0;
- for (group = first_group; group <= last_group;) {
- if (first_bit + len >= osb->bitmap_cpg)
- last_bit = osb->bitmap_cpg;
- else
- last_bit = first_bit + len;
- ret = ocfs2_read_group_descriptor(main_bm_inode,
- main_bm, group,
- &gd_bh);
- if (ret < 0) {
- mlog_errno(ret);
- break;
- }
- gd = (struct ocfs2_group_desc *)gd_bh->b_data;
- cnt = ocfs2_trim_group(sb, gd, group,
- first_bit, last_bit, minlen);
- brelse(gd_bh);
- gd_bh = NULL;
- if (cnt < 0) {
- ret = cnt;
- mlog_errno(ret);
- break;
- }
- trimmed += cnt;
- len -= osb->bitmap_cpg - first_bit;
- first_bit = 0;
- if (group == osb->first_cluster_group_blkno)
- group = ocfs2_clusters_to_blocks(sb, osb->bitmap_cpg);
- else
- group += ocfs2_clusters_to_blocks(sb, osb->bitmap_cpg);
- }
- range->len = trimmed * sb->s_blocksize;
- out_unlock:
- ocfs2_inode_unlock(main_bm_inode, 0);
- brelse(main_bm_bh);
- out_mutex:
- inode_unlock(main_bm_inode);
- iput(main_bm_inode);
- out:
- return ret;
- }
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