From: Qu Wenruo <wqu@suse.com> To: linux-btrfs@vger.kernel.org, u-boot@lists.denx.de Cc: marek.behun@nic.cz Subject: [PATCH U-BOOT v2 28/30] fs: btrfs: Imeplement btrfs_list_subvols() using new infrastructure Date: Mon, 25 May 2020 14:32:55 +0800 [thread overview] Message-ID: <20200525063257.46757-29-wqu@suse.com> (raw) In-Reply-To: <20200525063257.46757-1-wqu@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/subvolume.c | 78 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 73 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/subvolume.c b/fs/btrfs/subvolume.c index 258c3dafef60..6fc28d53e552 100644 --- a/fs/btrfs/subvolume.c +++ b/fs/btrfs/subvolume.c @@ -155,6 +155,72 @@ out: return ret; } +static int list_subvolums(struct btrfs_fs_info *fs_info) +{ + struct btrfs_root *tree_root = fs_info->tree_root; + struct btrfs_root *root; + struct btrfs_path path; + struct btrfs_key key; + char *result; + int ret = 0; + + result = malloc(PATH_MAX); + if (!result) + return -ENOMEM; + + ret = list_one_subvol(fs_info->fs_root, result); + if (ret < 0) + goto out; + root = fs_info->fs_root; + printf("ID %llu gen %llu path %.*s\n", + root->root_key.objectid, btrfs_root_generation(&root->root_item), + PATH_MAX, result); + + key.objectid = BTRFS_FIRST_FREE_OBJECTID; + key.type = BTRFS_ROOT_ITEM_KEY; + key.offset = 0; + btrfs_init_path(&path); + ret = btrfs_search_slot(NULL, tree_root, &key, &path, 0, 0); + if (ret < 0) + goto out; + while (1) { + if (path.slots[0] >= btrfs_header_nritems(path.nodes[0])) + goto next; + + btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]); + if (key.objectid > BTRFS_LAST_FREE_OBJECTID) + break; + if (key.objectid < BTRFS_FIRST_FREE_OBJECTID || + key.type != BTRFS_ROOT_ITEM_KEY) + goto next; + key.offset = (u64)-1; + root = btrfs_read_fs_root(fs_info, &key); + if (IS_ERR(root)) { + ret = PTR_ERR(root); + if (ret == -ENOENT) + goto next; + } + ret = list_one_subvol(root, result); + if (ret < 0) + goto out; + printf("ID %llu gen %llu path %.*s\n", + root->root_key.objectid, + btrfs_root_generation(&root->root_item), + PATH_MAX, result); +next: + ret = btrfs_next_item(tree_root, &path); + if (ret < 0) + goto out; + if (ret > 0) { + ret = 0; + break; + } + } +out: + free(result); + return ret; +} + static int get_subvol_name(u64 subvolid, char *name, int max_len) { struct btrfs_root_ref rref; @@ -268,10 +334,12 @@ static void list_subvols(u64 tree, char *nameptr, int max_name_len, int level) void btrfs_list_subvols(void) { - char *nameptr = malloc(4096); - - list_subvols(BTRFS_FS_TREE_OBJECTID, nameptr, nameptr ? 4096 : 0, 40); + struct btrfs_fs_info *fs_info = current_fs_info; + int ret; - if (nameptr) - free(nameptr); + if (!fs_info) + return; + ret = list_subvolums(fs_info); + if (ret < 0) + error("failed to list subvolume: %d", ret); } -- 2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Qu Wenruo <wqu@suse.com> To: u-boot@lists.denx.de Subject: [PATCH U-BOOT v2 28/30] fs: btrfs: Imeplement btrfs_list_subvols() using new infrastructure Date: Mon, 25 May 2020 14:32:55 +0800 [thread overview] Message-ID: <20200525063257.46757-29-wqu@suse.com> (raw) In-Reply-To: <20200525063257.46757-1-wqu@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/subvolume.c | 78 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 73 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/subvolume.c b/fs/btrfs/subvolume.c index 258c3dafef60..6fc28d53e552 100644 --- a/fs/btrfs/subvolume.c +++ b/fs/btrfs/subvolume.c @@ -155,6 +155,72 @@ out: return ret; } +static int list_subvolums(struct btrfs_fs_info *fs_info) +{ + struct btrfs_root *tree_root = fs_info->tree_root; + struct btrfs_root *root; + struct btrfs_path path; + struct btrfs_key key; + char *result; + int ret = 0; + + result = malloc(PATH_MAX); + if (!result) + return -ENOMEM; + + ret = list_one_subvol(fs_info->fs_root, result); + if (ret < 0) + goto out; + root = fs_info->fs_root; + printf("ID %llu gen %llu path %.*s\n", + root->root_key.objectid, btrfs_root_generation(&root->root_item), + PATH_MAX, result); + + key.objectid = BTRFS_FIRST_FREE_OBJECTID; + key.type = BTRFS_ROOT_ITEM_KEY; + key.offset = 0; + btrfs_init_path(&path); + ret = btrfs_search_slot(NULL, tree_root, &key, &path, 0, 0); + if (ret < 0) + goto out; + while (1) { + if (path.slots[0] >= btrfs_header_nritems(path.nodes[0])) + goto next; + + btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]); + if (key.objectid > BTRFS_LAST_FREE_OBJECTID) + break; + if (key.objectid < BTRFS_FIRST_FREE_OBJECTID || + key.type != BTRFS_ROOT_ITEM_KEY) + goto next; + key.offset = (u64)-1; + root = btrfs_read_fs_root(fs_info, &key); + if (IS_ERR(root)) { + ret = PTR_ERR(root); + if (ret == -ENOENT) + goto next; + } + ret = list_one_subvol(root, result); + if (ret < 0) + goto out; + printf("ID %llu gen %llu path %.*s\n", + root->root_key.objectid, + btrfs_root_generation(&root->root_item), + PATH_MAX, result); +next: + ret = btrfs_next_item(tree_root, &path); + if (ret < 0) + goto out; + if (ret > 0) { + ret = 0; + break; + } + } +out: + free(result); + return ret; +} + static int get_subvol_name(u64 subvolid, char *name, int max_len) { struct btrfs_root_ref rref; @@ -268,10 +334,12 @@ static void list_subvols(u64 tree, char *nameptr, int max_name_len, int level) void btrfs_list_subvols(void) { - char *nameptr = malloc(4096); - - list_subvols(BTRFS_FS_TREE_OBJECTID, nameptr, nameptr ? 4096 : 0, 40); + struct btrfs_fs_info *fs_info = current_fs_info; + int ret; - if (nameptr) - free(nameptr); + if (!fs_info) + return; + ret = list_subvolums(fs_info); + if (ret < 0) + error("failed to list subvolume: %d", ret); } -- 2.26.2
next prev parent reply other threads:[~2020-05-25 6:34 UTC|newest] Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-25 6:32 [PATCH U-BOOT v2 00/30] fs: btrfs: Re-implement btrfs support using the more widely used extent buffer base code Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 01/30] fs: btrfs: Sync btrfs_btree.h from kernel Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 02/30] fs: btrfs: Add More checksum algorithm support to btrfs Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 03/30] fs: btrfs: Cross-port btrfs_read_dev_super() from btrfs-progs Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 04/30] fs: btrfs: Cross-port rbtree-utils " Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 05/30] fs: btrfs: Cross-port extent-cache.[ch] " Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 06/30] fs: btrfs: Cross-port extent-io.[ch] " Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 07/30] fs: btrfs: Cross port structure accessor into ctree.h Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 08/30] fs: btrfs: Cross port volumes.[ch] from btrfs-progs Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 09/30] fs: btrfs: Crossport read_tree_block() " Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 10/30] fs: btrfs: Rename struct btrfs_path to struct __btrfs_path Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 11/30] fs: btrfs: Rename btrfs_root to __btrfs_root Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 12/30] fs: btrfs: Cross port struct btrfs_root to ctree.h Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 13/30] fs: btrfs: Crossport btrfs_search_slot() from btrfs-progs Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 14/30] fs: btrfs: Crossport btrfs_read_sys_array() and btrfs_read_chunk_tree() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 15/30] fs: btrfs: Crossport open_ctree_fs_info() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 16/30] fs: btrfs: Rename path resolve related functions to avoid name conflicts Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 17/30] fs: btrfs: Use btrfs_readlink() to implement __btrfs_readlink() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 18/30] fs: btrfs: inode: Allow next_length() to return value > BTRFS_NAME_LEN Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 19/30] fs: btrfs: Implement btrfs_lookup_path() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 20/30] fs: btrfs: Use btrfs_iter_dir() to replace btrfs_readdir() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 21/30] fs: btrfs: Use btrfs_lookup_path() to implement btrfs_exists() and btrfs_size() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 22/30] fs: btrfs: Rename btrfs_file_read() and its callees to avoid name conflicts Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 23/30] fs: btrfs: Introduce btrfs_read_extent_inline() and btrfs_read_extent_reg() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 24/30] fs: btrfs: Introduce lookup_data_extent() for later use Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 25/30] fs: btrfs: Implement btrfs_file_read() Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 26/30] fs: btrfs: Introduce function to reolve path in one subvolume Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 27/30] fs: btrfs: Introduce function to resolve the path of " Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo [this message] 2020-05-25 6:32 ` [PATCH U-BOOT v2 28/30] fs: btrfs: Imeplement btrfs_list_subvols() using new infrastructure Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 29/30] fs: btrfs: Cleanup the old implementation Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-05-25 6:32 ` [PATCH U-BOOT v2 30/30] MAINTAINERS: Add btrfs mail list Qu Wenruo 2020-05-25 6:32 ` Qu Wenruo 2020-06-23 0:50 ` [PATCH U-BOOT v2 00/30] fs: btrfs: Re-implement btrfs support using the more widely used extent buffer base code Qu Wenruo 2020-06-23 0:50 ` Qu Wenruo 2020-06-23 15:05 ` Marek Behún 2020-06-23 15:05 ` Marek Behún
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