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https://github.com/Fishwaldo/linux-bl808.git
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btrfs: send: refactor arguments of get_inode_info()
Refactor get_inode_info() to populate all wanted fields on an output structure. Besides, also introduce a helper function called get_inode_gen(), which is commonly used. Reviewed-by: Robbie Ko <robbieko@synology.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: BingJing Chang <bingjingc@synology.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
BingJing Chang
David Sterba
parent
52b029f427
commit
7e93f6dc11
1 changed files with 78 additions and 75 deletions
153
fs/btrfs/send.c
153
fs/btrfs/send.c
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@ -846,17 +846,31 @@ out:
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return ret;
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}
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struct btrfs_inode_info {
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u64 size;
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u64 gen;
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u64 mode;
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u64 uid;
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u64 gid;
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u64 rdev;
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u64 fileattr;
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};
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/*
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* Helper function to retrieve some fields from an inode item.
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*/
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static int __get_inode_info(struct btrfs_root *root, struct btrfs_path *path,
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u64 ino, u64 *size, u64 *gen, u64 *mode, u64 *uid,
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u64 *gid, u64 *rdev, u64 *fileattr)
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static int get_inode_info(struct btrfs_root *root, u64 ino,
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struct btrfs_inode_info *info)
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{
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int ret;
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struct btrfs_path *path;
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struct btrfs_inode_item *ii;
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struct btrfs_key key;
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path = alloc_path_for_send();
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if (!path)
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return -ENOMEM;
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key.objectid = ino;
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key.type = BTRFS_INODE_ITEM_KEY;
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key.offset = 0;
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@ -864,47 +878,42 @@ static int __get_inode_info(struct btrfs_root *root, struct btrfs_path *path,
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if (ret) {
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if (ret > 0)
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ret = -ENOENT;
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return ret;
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goto out;
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}
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if (!info)
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goto out;
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ii = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_inode_item);
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if (size)
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*size = btrfs_inode_size(path->nodes[0], ii);
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if (gen)
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*gen = btrfs_inode_generation(path->nodes[0], ii);
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if (mode)
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*mode = btrfs_inode_mode(path->nodes[0], ii);
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if (uid)
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*uid = btrfs_inode_uid(path->nodes[0], ii);
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if (gid)
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*gid = btrfs_inode_gid(path->nodes[0], ii);
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if (rdev)
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*rdev = btrfs_inode_rdev(path->nodes[0], ii);
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info->size = btrfs_inode_size(path->nodes[0], ii);
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info->gen = btrfs_inode_generation(path->nodes[0], ii);
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info->mode = btrfs_inode_mode(path->nodes[0], ii);
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info->uid = btrfs_inode_uid(path->nodes[0], ii);
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info->gid = btrfs_inode_gid(path->nodes[0], ii);
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info->rdev = btrfs_inode_rdev(path->nodes[0], ii);
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/*
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* Transfer the unchanged u64 value of btrfs_inode_item::flags, that's
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* otherwise logically split to 32/32 parts.
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*/
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if (fileattr)
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*fileattr = btrfs_inode_flags(path->nodes[0], ii);
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info->fileattr = btrfs_inode_flags(path->nodes[0], ii);
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out:
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btrfs_free_path(path);
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return ret;
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}
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static int get_inode_info(struct btrfs_root *root,
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u64 ino, u64 *size, u64 *gen,
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u64 *mode, u64 *uid, u64 *gid,
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u64 *rdev, u64 *fileattr)
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static int get_inode_gen(struct btrfs_root *root, u64 ino, u64 *gen)
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{
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struct btrfs_path *path;
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int ret;
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struct btrfs_inode_info info;
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path = alloc_path_for_send();
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if (!path)
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return -ENOMEM;
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ret = __get_inode_info(root, path, ino, size, gen, mode, uid, gid,
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rdev, fileattr);
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btrfs_free_path(path);
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if (!gen)
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return -EPERM;
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ret = get_inode_info(root, ino, &info);
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if (!ret)
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*gen = info.gen;
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return ret;
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}
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@ -1648,8 +1657,7 @@ static int get_cur_inode_state(struct send_ctx *sctx, u64 ino, u64 gen)
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u64 left_gen;
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u64 right_gen;
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ret = get_inode_info(sctx->send_root, ino, NULL, &left_gen, NULL, NULL,
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NULL, NULL, NULL);
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ret = get_inode_gen(sctx->send_root, ino, &left_gen);
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if (ret < 0 && ret != -ENOENT)
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goto out;
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left_ret = ret;
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@ -1657,8 +1665,7 @@ static int get_cur_inode_state(struct send_ctx *sctx, u64 ino, u64 gen)
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if (!sctx->parent_root) {
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right_ret = -ENOENT;
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} else {
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ret = get_inode_info(sctx->parent_root, ino, NULL, &right_gen,
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NULL, NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->parent_root, ino, &right_gen);
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if (ret < 0 && ret != -ENOENT)
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goto out;
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right_ret = ret;
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@ -1820,8 +1827,7 @@ static int get_first_ref(struct btrfs_root *root, u64 ino,
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btrfs_release_path(path);
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if (dir_gen) {
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ret = get_inode_info(root, parent_dir, NULL, dir_gen, NULL,
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NULL, NULL, NULL, NULL);
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ret = get_inode_gen(root, parent_dir, dir_gen);
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if (ret < 0)
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goto out;
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}
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@ -1878,6 +1884,7 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen,
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int ret = 0;
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u64 gen;
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u64 other_inode = 0;
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struct btrfs_inode_info info;
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if (!sctx->parent_root)
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goto out;
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@ -1892,8 +1899,7 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen,
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* and we can just unlink this entry.
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*/
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if (sctx->parent_root && dir != BTRFS_FIRST_FREE_OBJECTID) {
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ret = get_inode_info(sctx->parent_root, dir, NULL, &gen, NULL,
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NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->parent_root, dir, &gen);
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if (ret < 0 && ret != -ENOENT)
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goto out;
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if (ret) {
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@ -1920,13 +1926,14 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen,
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*/
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if (other_inode > sctx->send_progress ||
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is_waiting_for_move(sctx, other_inode)) {
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ret = get_inode_info(sctx->parent_root, other_inode, NULL,
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who_gen, who_mode, NULL, NULL, NULL, NULL);
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ret = get_inode_info(sctx->parent_root, other_inode, &info);
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if (ret < 0)
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goto out;
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ret = 1;
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*who_ino = other_inode;
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*who_gen = info.gen;
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*who_mode = info.mode;
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} else {
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ret = 0;
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}
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@ -1959,8 +1966,7 @@ static int did_overwrite_ref(struct send_ctx *sctx,
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goto out;
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if (dir != BTRFS_FIRST_FREE_OBJECTID) {
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ret = get_inode_info(sctx->send_root, dir, NULL, &gen, NULL,
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NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->send_root, dir, &gen);
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if (ret < 0 && ret != -ENOENT)
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goto out;
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if (ret) {
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@ -1982,8 +1988,7 @@ static int did_overwrite_ref(struct send_ctx *sctx,
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goto out;
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}
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ret = get_inode_info(sctx->send_root, ow_inode, NULL, &gen, NULL, NULL,
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NULL, NULL, NULL);
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ret = get_inode_gen(sctx->send_root, ow_inode, &gen);
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if (ret < 0)
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goto out;
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@ -2649,6 +2654,7 @@ static int send_create_inode(struct send_ctx *sctx, u64 ino)
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int ret = 0;
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struct fs_path *p;
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int cmd;
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struct btrfs_inode_info info;
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u64 gen;
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u64 mode;
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u64 rdev;
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@ -2660,10 +2666,12 @@ static int send_create_inode(struct send_ctx *sctx, u64 ino)
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return -ENOMEM;
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if (ino != sctx->cur_ino) {
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ret = get_inode_info(sctx->send_root, ino, NULL, &gen, &mode,
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NULL, NULL, &rdev, NULL);
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ret = get_inode_info(sctx->send_root, ino, &info);
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if (ret < 0)
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goto out;
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gen = info.gen;
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mode = info.mode;
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rdev = info.rdev;
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} else {
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gen = sctx->cur_inode_gen;
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mode = sctx->cur_inode_mode;
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@ -3363,8 +3371,7 @@ finish:
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/*
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* The parent inode might have been deleted in the send snapshot
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*/
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ret = get_inode_info(sctx->send_root, cur->dir, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL);
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ret = get_inode_info(sctx->send_root, cur->dir, NULL);
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if (ret == -ENOENT) {
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ret = 0;
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continue;
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@ -3538,12 +3545,10 @@ static int wait_for_dest_dir_move(struct send_ctx *sctx,
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goto out;
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}
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ret = get_inode_info(sctx->parent_root, di_key.objectid, NULL,
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&left_gen, NULL, NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->parent_root, di_key.objectid, &left_gen);
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if (ret < 0)
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goto out;
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ret = get_inode_info(sctx->send_root, di_key.objectid, NULL,
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&right_gen, NULL, NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->send_root, di_key.objectid, &right_gen);
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if (ret < 0) {
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if (ret == -ENOENT)
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ret = 0;
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@ -3673,8 +3678,7 @@ static int is_ancestor(struct btrfs_root *root,
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cur_offset = item_size;
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}
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ret = get_inode_info(root, parent, NULL, &parent_gen,
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NULL, NULL, NULL, NULL, NULL);
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ret = get_inode_gen(root, parent, &parent_gen);
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if (ret < 0)
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goto out;
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ret = check_ino_in_path(root, ino1, ino1_gen,
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@ -3764,9 +3768,7 @@ static int wait_for_parent_move(struct send_ctx *sctx,
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memcmp(path_before->start, path_after->start, len1))) {
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u64 parent_ino_gen;
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ret = get_inode_info(sctx->parent_root, ino, NULL,
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&parent_ino_gen, NULL, NULL, NULL,
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NULL, NULL);
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ret = get_inode_gen(sctx->parent_root, ino, &parent_ino_gen);
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if (ret < 0)
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goto out;
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if (ino_gen == parent_ino_gen) {
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@ -4445,8 +4447,7 @@ static int record_new_ref_if_needed(int num, u64 dir, int index,
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struct recorded_ref *ref;
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u64 dir_gen;
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ret = get_inode_info(sctx->send_root, dir, NULL, &dir_gen, NULL,
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NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->send_root, dir, &dir_gen);
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if (ret < 0)
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goto out;
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@ -4476,8 +4477,7 @@ static int record_deleted_ref_if_needed(int num, u64 dir, int index,
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struct recorded_ref *ref;
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u64 dir_gen;
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ret = get_inode_info(sctx->parent_root, dir, NULL, &dir_gen, NULL,
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NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->parent_root, dir, &dir_gen);
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if (ret < 0)
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goto out;
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@ -5138,8 +5138,7 @@ static int send_clone(struct send_ctx *sctx,
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TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, p);
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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, NULL);
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ret = get_inode_gen(sctx->send_root, clone_root->ino, &gen);
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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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@ -5618,6 +5617,7 @@ static int clone_range(struct send_ctx *sctx, struct btrfs_path *dst_path,
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struct btrfs_path *path;
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struct btrfs_key key;
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int ret;
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struct btrfs_inode_info info;
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u64 clone_src_i_size = 0;
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/*
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@ -5647,12 +5647,11 @@ static int clone_range(struct send_ctx *sctx, struct btrfs_path *dst_path,
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* There are inodes that have extents that lie behind its i_size. Don't
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* accept clones from these extents.
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*/
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ret = __get_inode_info(clone_root->root, path, clone_root->ino,
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&clone_src_i_size, NULL, NULL, NULL, NULL, NULL,
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NULL);
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ret = get_inode_info(clone_root->root, clone_root->ino, &info);
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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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clone_src_i_size = info.size;
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/*
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* We can't send a clone operation for the entire range if we find
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@ -6341,6 +6340,7 @@ out:
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static int finish_inode_if_needed(struct send_ctx *sctx, int at_end)
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{
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int ret = 0;
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struct btrfs_inode_info info;
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u64 left_mode;
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u64 left_uid;
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u64 left_gid;
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@ -6383,11 +6383,13 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end)
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goto out;
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if (!at_end && sctx->cmp_key->objectid == sctx->cur_ino)
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goto out;
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ret = get_inode_info(sctx->send_root, sctx->cur_ino, NULL, NULL,
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&left_mode, &left_uid, &left_gid, NULL, &left_fileattr);
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ret = get_inode_info(sctx->send_root, sctx->cur_ino, &info);
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if (ret < 0)
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goto out;
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left_mode = info.mode;
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left_uid = info.uid;
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left_gid = info.gid;
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left_fileattr = info.fileattr;
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if (!sctx->parent_root || sctx->cur_inode_new) {
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need_chown = 1;
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@ -6398,11 +6400,14 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end)
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} else {
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u64 old_size;
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ret = get_inode_info(sctx->parent_root, sctx->cur_ino,
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&old_size, NULL, &right_mode, &right_uid,
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&right_gid, NULL, &right_fileattr);
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ret = get_inode_info(sctx->parent_root, sctx->cur_ino, &info);
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if (ret < 0)
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goto out;
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old_size = info.size;
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right_mode = info.mode;
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right_uid = info.uid;
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right_gid = info.gid;
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right_fileattr = info.fileattr;
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if (left_uid != right_uid || left_gid != right_gid)
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need_chown = 1;
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@ -6888,13 +6893,11 @@ static int dir_changed(struct send_ctx *sctx, u64 dir)
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u64 orig_gen, new_gen;
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int ret;
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ret = get_inode_info(sctx->send_root, dir, NULL, &new_gen, NULL, NULL,
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NULL, NULL, NULL);
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ret = get_inode_gen(sctx->send_root, dir, &new_gen);
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if (ret)
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return ret;
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ret = get_inode_info(sctx->parent_root, dir, NULL, &orig_gen, NULL,
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NULL, NULL, NULL, NULL);
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ret = get_inode_gen(sctx->parent_root, dir, &orig_gen);
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if (ret)
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return ret;
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