forked from luck/tmp_suning_uos_patched
Btrfs: code cleanups for send/receive
Doing some code cleanups as suggested by Arne. Changes do not change any logic. Signed-off-by: Alexander Block <ablock84@googlemail.com>
This commit is contained in:
Alexander Block
Chris Mason
parent
766702ef49
commit
e938c8ad54
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@ -1115,10 +1115,12 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
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*/
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if (ino >= bctx->cur_objectid)
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return 0;
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/*if (ino > ctx->cur_objectid)
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#if 0
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if (ino > bctx->cur_objectid)
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return 0;
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if (offset + ctx->extent_len > ctx->cur_offset)
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return 0;*/
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if (offset + bctx->extent_len > bctx->cur_offset)
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return 0;
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#endif
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}
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bctx->found++;
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@ -1327,8 +1329,6 @@ static int read_symlink(struct send_ctx *sctx,
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len = btrfs_file_extent_inline_len(path->nodes[0], ei);
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ret = fs_path_add_from_extent_buffer(dest, path->nodes[0], off, len);
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if (ret < 0)
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goto out;
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out:
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btrfs_free_path(path);
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@ -1440,9 +1440,9 @@ static int get_cur_inode_state(struct send_ctx *sctx, u64 ino, u64 gen)
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}
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if (!left_ret && !right_ret) {
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if (left_gen == gen && right_gen == gen)
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if (left_gen == gen && right_gen == gen) {
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ret = inode_state_no_change;
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else if (left_gen == gen) {
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} else if (left_gen == gen) {
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if (ino < sctx->send_progress)
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ret = inode_state_did_create;
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else
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@ -1615,11 +1615,7 @@ static int is_first_ref(struct send_ctx *sctx,
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goto out;
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}
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ret = memcmp(tmp_name->start, name, name_len);
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if (ret)
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ret = 0;
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else
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ret = 1;
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ret = !memcmp(tmp_name->start, name, name_len);
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out:
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fs_path_free(sctx, tmp_name);
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@ -1761,8 +1757,6 @@ static int did_overwrite_first_ref(struct send_ctx *sctx, u64 ino, u64 gen)
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ret = did_overwrite_ref(sctx, dir, dir_gen, ino, gen,
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name->start, fs_path_len(name));
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if (ret < 0)
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goto out;
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out:
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fs_path_free(sctx, name);
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@ -1866,9 +1860,10 @@ static void name_cache_clean_unused(struct send_ctx *sctx)
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static void name_cache_free(struct send_ctx *sctx)
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{
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struct name_cache_entry *nce;
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struct name_cache_entry *tmp;
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list_for_each_entry_safe(nce, tmp, &sctx->name_cache_list, list) {
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while (!list_empty(&sctx->name_cache_list)) {
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nce = list_entry(sctx->name_cache_list.next,
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struct name_cache_entry, list);
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name_cache_delete(sctx, nce);
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kfree(nce);
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}
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@ -2188,9 +2183,6 @@ static int send_subvol_begin(struct send_ctx *sctx)
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read_extent_buffer(leaf, name, (unsigned long)(ref + 1), namelen);
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btrfs_release_path(path);
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if (ret < 0)
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goto out;
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if (parent_root) {
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ret = begin_cmd(sctx, BTRFS_SEND_C_SNAPSHOT);
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if (ret < 0)
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@ -2393,19 +2385,19 @@ verbose_printk("btrfs: send_create_inode %llu\n", ino);
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if (ret < 0)
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goto out;
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if (S_ISREG(mode))
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if (S_ISREG(mode)) {
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cmd = BTRFS_SEND_C_MKFILE;
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else if (S_ISDIR(mode))
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} else if (S_ISDIR(mode)) {
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cmd = BTRFS_SEND_C_MKDIR;
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else if (S_ISLNK(mode))
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} else if (S_ISLNK(mode)) {
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cmd = BTRFS_SEND_C_SYMLINK;
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else if (S_ISCHR(mode) || S_ISBLK(mode))
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} else if (S_ISCHR(mode) || S_ISBLK(mode)) {
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cmd = BTRFS_SEND_C_MKNOD;
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else if (S_ISFIFO(mode))
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} else if (S_ISFIFO(mode)) {
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cmd = BTRFS_SEND_C_MKFIFO;
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else if (S_ISSOCK(mode))
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} else if (S_ISSOCK(mode)) {
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cmd = BTRFS_SEND_C_MKSOCK;
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else {
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} else {
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printk(KERN_WARNING "btrfs: unexpected inode type %o",
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(int)(mode & S_IFMT));
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ret = -ENOTSUPP;
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@ -2583,13 +2575,13 @@ static int record_ref(struct list_head *head, u64 dir,
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static void __free_recorded_refs(struct send_ctx *sctx, struct list_head *head)
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{
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struct recorded_ref *cur;
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struct recorded_ref *tmp;
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list_for_each_entry_safe(cur, tmp, head, list) {
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while (!list_empty(head)) {
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cur = list_entry(head->next, struct recorded_ref, list);
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fs_path_free(sctx, cur->full_path);
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list_del(&cur->list);
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kfree(cur);
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}
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INIT_LIST_HEAD(head);
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}
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static void free_recorded_refs(struct send_ctx *sctx)
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@ -3205,24 +3197,18 @@ static int process_all_refs(struct send_ctx *sctx,
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key.offset = 0;
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while (1) {
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ret = btrfs_search_slot_for_read(root, &key, path, 1, 0);
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if (ret < 0) {
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btrfs_release_path(path);
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if (ret < 0)
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goto out;
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}
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if (ret) {
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btrfs_release_path(path);
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if (ret)
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break;
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}
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eb = path->nodes[0];
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slot = path->slots[0];
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btrfs_item_key_to_cpu(eb, &found_key, slot);
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if (found_key.objectid != key.objectid ||
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found_key.type != key.type) {
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btrfs_release_path(path);
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found_key.type != key.type)
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break;
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}
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ret = iterate_inode_ref(sctx, sctx->parent_root, path,
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&found_key, 0, cb, sctx);
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@ -3232,6 +3218,7 @@ static int process_all_refs(struct send_ctx *sctx,
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key.offset = found_key.offset + 1;
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}
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btrfs_release_path(path);
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ret = process_recorded_refs(sctx);
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@ -3554,7 +3541,7 @@ static int send_write(struct send_ctx *sctx, u64 offset, u32 len)
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int ret = 0;
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struct fs_path *p;
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loff_t pos = offset;
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int readed = 0;
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int num_read = 0;
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mm_segment_t old_fs;
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p = fs_path_alloc(sctx);
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@ -3579,8 +3566,8 @@ verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len);
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ret = vfs_read(sctx->cur_inode_filp, sctx->read_buf, len, &pos);
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if (ret < 0)
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goto out;
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readed = ret;
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if (!readed)
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num_read = ret;
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if (!num_read)
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goto out;
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ret = begin_cmd(sctx, BTRFS_SEND_C_WRITE);
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@ -3593,7 +3580,7 @@ verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len);
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TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p);
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TLV_PUT_U64(sctx, BTRFS_SEND_A_FILE_OFFSET, offset);
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TLV_PUT(sctx, BTRFS_SEND_A_DATA, sctx->read_buf, readed);
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TLV_PUT(sctx, BTRFS_SEND_A_DATA, sctx->read_buf, num_read);
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ret = send_cmd(sctx);
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@ -3603,7 +3590,7 @@ verbose_printk("btrfs: send_write offset=%llu, len=%d\n", offset, len);
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set_fs(old_fs);
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if (ret < 0)
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return ret;
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return readed;
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return num_read;
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}
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/*
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@ -3614,7 +3601,6 @@ static int send_clone(struct send_ctx *sctx,
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struct clone_root *clone_root)
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{
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int ret = 0;
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struct btrfs_root *clone_root2 = clone_root->root;
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struct fs_path *p;
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u64 gen;
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@ -3639,22 +3625,23 @@ verbose_printk("btrfs: send_clone offset=%llu, len=%d, clone_root=%llu, "
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TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_LEN, len);
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TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p);
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if (clone_root2 == sctx->send_root) {
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if (clone_root->root == sctx->send_root) {
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ret = get_inode_info(sctx->send_root, clone_root->ino, NULL,
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&gen, NULL, NULL, NULL, NULL);
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if (ret < 0)
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goto out;
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ret = get_cur_path(sctx, clone_root->ino, gen, p);
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} else {
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ret = get_inode_path(sctx, clone_root2, clone_root->ino, p);
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ret = get_inode_path(sctx, clone_root->root,
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clone_root->ino, p);
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}
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if (ret < 0)
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goto out;
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TLV_PUT_UUID(sctx, BTRFS_SEND_A_CLONE_UUID,
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clone_root2->root_item.uuid);
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clone_root->root->root_item.uuid);
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TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_CTRANSID,
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clone_root2->root_item.ctransid);
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clone_root->root->root_item.ctransid);
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TLV_PUT_PATH(sctx, BTRFS_SEND_A_CLONE_PATH, p);
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TLV_PUT_U64(sctx, BTRFS_SEND_A_CLONE_OFFSET,
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clone_root->offset);
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