[07/21] btrfs: use fscrypt_name's instead of name/len everywhere.

Message ID	b3d4d1e51502de6f416f6e5fb5b5a61d7397e215.1660744500.git.sweettea-kernel@dorminy.me (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-btrfs-owner@kernel.org> From: Sweet Tea Dorminy <sweettea-kernel@dorminy.me> To: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>, David Sterba <dsterba@suse.com>, "Theodore Y . Ts'o " <tytso@mit.edu>, Jaegeuk Kim <jaegeuk@kernel.org>, Eric Biggers <ebiggers@kernel.org>, linux-fscrypt@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@fb.com Cc: Sweet Tea Dorminy <sweettea-kernel@dorminy.me> Subject: [PATCH 07/21] btrfs: use fscrypt_name's instead of name/len everywhere. Date: Wed, 17 Aug 2022 10:49:51 -0400 Message-Id: <b3d4d1e51502de6f416f6e5fb5b5a61d7397e215.1660744500.git.sweettea-kernel@dorminy.me> In-Reply-To: <cover.1660744500.git.sweettea-kernel@dorminy.me> References: <cover.1660744500.git.sweettea-kernel@dorminy.me> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	btrfs: add fscrypt integration \| expand [00/21] btrfs: add fscrypt integration [01/21] fscrypt: expose fscrypt_nokey_name [02/21] fscrypt: add flag allowing partially-encrypted directories [03/21] fscrypt: add fscrypt_have_same_policy() to check inode's compatibility [04/21] fscrypt: add a function for a filesystem to generate an IV [05/21] fscrypt: add new encryption policy for btrfs. [06/21] btrfs: store directorys' encryption state [07/21] btrfs: use fscrypt_name's instead of name/len everywhere. [08/21] btrfs: setup fscrypt_names from dentrys using helper [09/21] btrfs: factor a fscrypt_name matching method [10/21] btrfs: disable various operations on encrypted inodes [11/21] btrfs: add fscrypt operation table to superblock [12/21] btrfs: start using fscrypt hooks. [13/21] btrfs: add fscrypt_context items. [14/21] btrfs: translate btrfs encryption flags and encrypted inode flag. [15/21] btrfs: add iv generation function for fscrypt [16/21] btrfs: store an IV per encrypted normal file extent [17/21] btrfs: Add new FEATURE_INCOMPAT_FSCRYPT feature flag. [18/21] btrfs: reuse encrypted filename hash when possible. [19/21] btrfs: adapt directory read and lookup to potentially encrypted filenames [20/21] btrfs: encrypt normal file extent data if appropriate [21/21] btrfs: implement fscrypt ioctls

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 53d68fe9c355..96b72b90a1d0 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -21,11 +21,13 @@ #include <linux/pagemap.h> #include <linux/btrfs.h> #include <linux/btrfs_tree.h> +#include <linux/fscrypt.h> #include <linux/workqueue.h> #include <linux/security.h> #include <linux/sizes.h> #include <linux/dynamic_debug.h> #include <linux/refcount.h> +#include <linux/crc32.h> #include <linux/crc32c.h> #include <linux/iomap.h> #include "extent-io-tree.h" @@ -2823,18 +2825,19 @@ static inline void btrfs_crc32c_final(u32 crc, u8 *result) put_unaligned_le32(~crc, result); } -static inline u64 btrfs_name_hash(const char *name, int len) +static inline u64 btrfs_name_hash(const struct fscrypt_name *name) { - return crc32c((u32)~1, name, len); + return crc32c((u32)~1, fname_name(name), fname_len(name)); } /* * Figure the key offset of an extended inode ref */ -static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, - int len) +static inline u64 btrfs_extref_hash(u64 parent_objectid, + const struct fscrypt_name *name) { - return (u64) crc32c(parent_objectid, name, len); + return (u64) crc32c(parent_objectid, fname_name(name), + fname_len(name)); } static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) @@ -3270,11 +3273,11 @@ static inline void btrfs_clear_sb_rdonly(struct super_block *sb) /* root-item.c */ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 sequence, const char *name, - int name_len); + u64 ref_id, u64 dirid, u64 sequence, + const struct fscrypt_name *fname); int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 *sequence, const char *name, - int name_len); + u64 ref_id, u64 dirid, u64 *sequence, + const struct fscrypt_name *fname); int btrfs_del_root(struct btrfs_trans_handle *trans, const struct btrfs_key *key); int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -3303,25 +3306,26 @@ int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); /* dir-item.c */ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, - const char *name, int name_len); -int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, - int name_len, struct btrfs_inode *dir, - struct btrfs_key *location, u8 type, u64 index); + const struct fscrypt_name *fname); +int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, + const struct fscrypt_name *fname, + struct btrfs_inode *dir, struct btrfs_key *location, + u8 type, u64 index); struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - const char *name, int name_len, + const struct fscrypt_name *fname, int mod); struct btrfs_dir_item * btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - u64 index, const char *name, int name_len, + u64 index, const struct fscrypt_name *fname, int mod); struct btrfs_dir_item * btrfs_search_dir_index_item(struct btrfs_root *root, struct btrfs_path *path, u64 dirid, - const char *name, int name_len); + const struct fscrypt_name *fname); int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, @@ -3329,17 +3333,16 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid, - const char *name, u16 name_len, + const struct fscrypt_name *fname, const void *data, u16 data_len); struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - const char *name, u16 name_len, + const struct fscrypt_name *fname, int mod); struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, struct btrfs_path *path, - const char *name, - int name_len); + const struct fscrypt_name *name); /* orphan.c */ int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, @@ -3403,10 +3406,11 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); int btrfs_unlink_inode(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len); + const struct fscrypt_name *fname); int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_inode *parent_inode, struct btrfs_inode *inode, - const char *name, int name_len, int add_backref, u64 index); + const struct fscrypt_name *fname, int add_backref, + u64 index); int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, int front); @@ -3422,6 +3426,7 @@ struct btrfs_new_inode_args { struct inode *dir; struct dentry *dentry; struct inode *inode; + struct fscrypt_name fname; bool orphan; bool subvol; diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index ec13ae9ca332..9a4882960455 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -1439,7 +1439,7 @@ void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info) /* Will return 0 or -ENOMEM */ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, - const char *name, int name_len, + const struct fscrypt_name *fname, struct btrfs_inode *dir, struct btrfs_disk_key *disk_key, u8 flags, u64 index) @@ -1457,7 +1457,8 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, if (IS_ERR(delayed_node)) return PTR_ERR(delayed_node); - delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + name_len); + delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + + fname_len(fname)); if (!delayed_item) { ret = -ENOMEM; goto release_node; @@ -1472,9 +1473,9 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, dir_item->location = *disk_key; btrfs_set_stack_dir_transid(dir_item, trans->transid); btrfs_set_stack_dir_data_len(dir_item, 0); - btrfs_set_stack_dir_name_len(dir_item, name_len); + btrfs_set_stack_dir_name_len(dir_item, fname_len(fname)); btrfs_set_stack_dir_flags(dir_item, flags); - memcpy((char *)(dir_item + 1), name, name_len); + memcpy((char *)(dir_item + 1), fname_name(fname), fname_len(fname)); data_len = delayed_item->data_len + sizeof(struct btrfs_item); @@ -1525,7 +1526,8 @@ int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, if (unlikely(ret)) { btrfs_err(trans->fs_info, "err add delayed dir index item(name: %.*s) into the insertion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", - name_len, name, delayed_node->root->root_key.objectid, + fname_len(fname), fname_name(fname), + delayed_node->root->root_key.objectid, delayed_node->inode_id, ret); BUG(); } diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h index c565f15e7af5..968461b3c350 100644 --- a/fs/btrfs/delayed-inode.h +++ b/fs/btrfs/delayed-inode.h @@ -13,6 +13,7 @@ #include <linux/list.h> #include <linux/wait.h> #include <linux/atomic.h> +#include <linux/fscrypt.h> #include <linux/refcount.h> #include "ctree.h" @@ -97,7 +98,7 @@ static inline void btrfs_init_delayed_root( } int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, - const char *name, int name_len, + const struct fscrypt_name *fname, struct btrfs_inode *dir, struct btrfs_disk_key *disk_key, u8 flags, u64 index); diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index e37b075afa96..b4c1e2a40401 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -21,8 +21,7 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle struct btrfs_path *path, struct btrfs_key *cpu_key, u32 data_size, - const char *name, - int name_len) + const struct fscrypt_name *fname) { struct btrfs_fs_info *fs_info = root->fs_info; int ret; @@ -32,7 +31,7 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle ret = btrfs_insert_empty_item(trans, root, path, cpu_key, data_size); if (ret == -EEXIST) { struct btrfs_dir_item *di; - di = btrfs_match_dir_item_name(fs_info, path, name, name_len); + di = btrfs_match_dir_item_name(fs_info, path, fname); if (di) return ERR_PTR(-EEXIST); btrfs_extend_item(path, data_size); @@ -53,7 +52,7 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid, - const char *name, u16 name_len, + const struct fscrypt_name *fname, const void *data, u16 data_len) { int ret = 0; @@ -64,16 +63,16 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, struct extent_buffer *leaf; u32 data_size; - if (name_len + data_len > BTRFS_MAX_XATTR_SIZE(root->fs_info)) + if (fname_len(fname) + data_len > BTRFS_MAX_XATTR_SIZE(root->fs_info)) return -ENOSPC; key.objectid = objectid; key.type = BTRFS_XATTR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(fname); - data_size = sizeof(*dir_item) + name_len + data_len; + data_size = sizeof(*dir_item) + fname_len(fname) + data_len; dir_item = insert_with_overflow(trans, root, path, &key, data_size, - name, name_len); + fname); if (IS_ERR(dir_item)) return PTR_ERR(dir_item); memset(&location, 0, sizeof(location)); @@ -82,13 +81,14 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, btrfs_cpu_key_to_disk(&disk_key, &location); btrfs_set_dir_item_key(leaf, dir_item, &disk_key); btrfs_set_dir_flags(leaf, dir_item, BTRFS_FT_XATTR); - btrfs_set_dir_name_len(leaf, dir_item, name_len); + btrfs_set_dir_name_len(leaf, dir_item, fname_len(fname)); btrfs_set_dir_transid(leaf, dir_item, trans->transid); btrfs_set_dir_data_len(leaf, dir_item, data_len); name_ptr = (unsigned long)(dir_item + 1); - data_ptr = (unsigned long)((char *)name_ptr + name_len); + data_ptr = (unsigned long)((char *)name_ptr + fname_len(fname)); - write_extent_buffer(leaf, name, name_ptr, name_len); + write_extent_buffer(leaf, fname_name(fname), name_ptr, + fname_len(fname)); write_extent_buffer(leaf, data, data_ptr, data_len); btrfs_mark_buffer_dirty(path->nodes[0]); @@ -103,9 +103,10 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, * to use for the second index (if one is created). * Will return 0 or -ENOMEM */ -int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, - int name_len, struct btrfs_inode *dir, - struct btrfs_key *location, u8 type, u64 index) +int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, + const struct fscrypt_name *fname, + struct btrfs_inode *dir, struct btrfs_key *location, + u8 type, u64 index) { int ret = 0; int ret2 = 0; @@ -120,7 +121,7 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, key.objectid = btrfs_ino(dir); key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(fname); path = btrfs_alloc_path(); if (!path) @@ -128,9 +129,9 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, btrfs_cpu_key_to_disk(&disk_key, location); - data_size = sizeof(*dir_item) + name_len; + data_size = sizeof(*dir_item) + fname_len(fname); dir_item = insert_with_overflow(trans, root, path, &key, data_size, - name, name_len); + fname); if (IS_ERR(dir_item)) { ret = PTR_ERR(dir_item); if (ret == -EEXIST) @@ -142,11 +143,12 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, btrfs_set_dir_item_key(leaf, dir_item, &disk_key); btrfs_set_dir_flags(leaf, dir_item, type); btrfs_set_dir_data_len(leaf, dir_item, 0); - btrfs_set_dir_name_len(leaf, dir_item, name_len); + btrfs_set_dir_name_len(leaf, dir_item, fname_len(fname)); btrfs_set_dir_transid(leaf, dir_item, trans->transid); name_ptr = (unsigned long)(dir_item + 1); - write_extent_buffer(leaf, name, name_ptr, name_len); + write_extent_buffer(leaf, fname_name(fname), name_ptr, + fname_len(fname)); btrfs_mark_buffer_dirty(leaf); second_insert: @@ -157,7 +159,7 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, } btrfs_release_path(path); - ret2 = btrfs_insert_delayed_dir_index(trans, name, name_len, dir, + ret2 = btrfs_insert_delayed_dir_index(trans, fname, dir, &disk_key, type, index); out_free: btrfs_free_path(path); @@ -171,8 +173,8 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, static struct btrfs_dir_item *btrfs_lookup_match_dir( struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, - struct btrfs_key *key, const char *name, - int name_len, int mod) + struct btrfs_key *key, const struct fscrypt_name *fname, + int mod) { const int ins_len = (mod < 0 ? -1 : 0); const int cow = (mod != 0); @@ -184,7 +186,7 @@ static struct btrfs_dir_item *btrfs_lookup_match_dir( if (ret > 0) return ERR_PTR(-ENOENT); - return btrfs_match_dir_item_name(root->fs_info, path, name, name_len); + return btrfs_match_dir_item_name(root->fs_info, path, fname); } /* @@ -206,7 +208,7 @@ static struct btrfs_dir_item *btrfs_lookup_match_dir( struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - const char *name, int name_len, + const struct fscrypt_name *fname, int mod) { struct btrfs_key key; @@ -214,9 +216,9 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, key.objectid = dir; key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(fname); - di = btrfs_lookup_match_dir(trans, root, path, &key, name, name_len, mod); + di = btrfs_lookup_match_dir(trans, root, path, &key, fname, mod); if (IS_ERR(di) && PTR_ERR(di) == -ENOENT) return NULL; @@ -224,7 +226,7 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, } int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, - const char *name, int name_len) + const struct fscrypt_name *fname) { int ret; struct btrfs_key key; @@ -240,9 +242,9 @@ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, key.objectid = dir; key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(fname); - di = btrfs_lookup_match_dir(NULL, root, path, &key, name, name_len, 0); + di = btrfs_lookup_match_dir(NULL, root, path, &key, fname, 0); if (IS_ERR(di)) { ret = PTR_ERR(di); /* Nothing found, we're safe */ @@ -266,7 +268,7 @@ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, * see if there is room in the item to insert this * name */ - data_size = sizeof(*di) + name_len; + data_size = sizeof(*di) + fname_len(fname); leaf = path->nodes[0]; slot = path->slots[0]; if (data_size + btrfs_item_size(leaf, slot) + @@ -303,7 +305,7 @@ struct btrfs_dir_item * btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - u64 index, const char *name, int name_len, + u64 index, const struct fscrypt_name *fname, int mod) { struct btrfs_dir_item *di; @@ -313,7 +315,7 @@ btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, key.type = BTRFS_DIR_INDEX_KEY; key.offset = index; - di = btrfs_lookup_match_dir(trans, root, path, &key, name, name_len, mod); + di = btrfs_lookup_match_dir(trans, root, path, &key, fname, mod); if (di == ERR_PTR(-ENOENT)) return NULL; @@ -323,7 +325,7 @@ btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, struct btrfs_dir_item * btrfs_search_dir_index_item(struct btrfs_root *root, struct btrfs_path *path, u64 dirid, - const char *name, int name_len) + const struct fscrypt_name *fname) { struct btrfs_dir_item *di; struct btrfs_key key; @@ -337,8 +339,7 @@ btrfs_search_dir_index_item(struct btrfs_root *root, if (key.objectid != dirid || key.type != BTRFS_DIR_INDEX_KEY) break; - di = btrfs_match_dir_item_name(root->fs_info, path, - name, name_len); + di = btrfs_match_dir_item_name(root->fs_info, path, fname); if (di) return di; } @@ -352,7 +353,7 @@ btrfs_search_dir_index_item(struct btrfs_root *root, struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - const char *name, u16 name_len, + const struct fscrypt_name *fname, int mod) { struct btrfs_key key; @@ -360,9 +361,9 @@ struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, key.objectid = dir; key.type = BTRFS_XATTR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(fname); - di = btrfs_lookup_match_dir(trans, root, path, &key, name, name_len, mod); + di = btrfs_lookup_match_dir(trans, root, path, &key, fname, mod); if (IS_ERR(di) && PTR_ERR(di) == -ENOENT) return NULL; @@ -376,10 +377,9 @@ struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, */ struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, struct btrfs_path *path, - const char *name, int name_len) + const struct fscrypt_name *fname) { struct btrfs_dir_item *dir_item; - unsigned long name_ptr; u32 total_len; u32 cur = 0; u32 this_len; @@ -390,13 +390,14 @@ struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, total_len = btrfs_item_size(leaf, path->slots[0]); while (cur < total_len) { + unsigned long name_ptr = (unsigned long)(dir_item + 1); this_len = sizeof(*dir_item) + btrfs_dir_name_len(leaf, dir_item) + btrfs_dir_data_len(leaf, dir_item); - name_ptr = (unsigned long)(dir_item + 1); - if (btrfs_dir_name_len(leaf, dir_item) == name_len && - memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0) + if (btrfs_dir_name_len(leaf, dir_item) == fname_len(fname) && + memcmp_extent_buffer(leaf, fname_name(fname), name_ptr, + fname_len(fname)) == 0) return dir_item; cur += this_len; diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c index 0eeb5ea87894..78053eb9589c 100644 --- a/fs/btrfs/inode-item.c +++ b/fs/btrfs/inode-item.c @@ -3,15 +3,16 @@ * Copyright (C) 2007 Oracle. All rights reserved. */ +#include <linux/crc32.h> #include "ctree.h" #include "inode-item.h" #include "disk-io.h" #include "transaction.h" #include "print-tree.h" -struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, - int slot, const char *name, - int name_len) +struct btrfs_inode_ref * +btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, + const struct fscrypt_name *fname) { struct btrfs_inode_ref *ref; unsigned long ptr; @@ -27,9 +28,10 @@ struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, len = btrfs_inode_ref_name_len(leaf, ref); name_ptr = (unsigned long)(ref + 1); cur_offset += len + sizeof(*ref); - if (len != name_len) + if (len != fname_len(fname)) continue; - if (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0) + if (memcmp_extent_buffer(leaf, fname_name(fname), name_ptr, + fname_len(fname)) == 0) return ref; } return NULL; @@ -37,7 +39,7 @@ struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( struct extent_buffer *leaf, int slot, u64 ref_objectid, - const char *name, int name_len) + const struct fscrypt_name *fname) { struct btrfs_inode_extref *extref; unsigned long ptr; @@ -60,9 +62,10 @@ struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( name_ptr = (unsigned long)(&extref->name); ref_name_len = btrfs_inode_extref_name_len(leaf, extref); - if (ref_name_len == name_len && + if (ref_name_len == fname_len(fname) && btrfs_inode_extref_parent(leaf, extref) == ref_objectid && - (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0)) + (memcmp_extent_buffer(leaf, fname_name(fname), name_ptr, + fname_len(fname)) == 0)) return extref; cur_offset += ref_name_len + sizeof(*extref); @@ -75,7 +78,7 @@ struct btrfs_inode_extref * btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, int ins_len, int cow) { @@ -84,7 +87,7 @@ btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, key.objectid = inode_objectid; key.type = BTRFS_INODE_EXTREF_KEY; - key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + key.offset = btrfs_extref_hash(ref_objectid, fname); ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); if (ret < 0) @@ -92,13 +95,12 @@ btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, if (ret > 0) return NULL; return btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], - ref_objectid, name, name_len); - + ref_objectid, fname); } static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, u64 *index) { @@ -107,14 +109,14 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_inode_extref *extref; struct extent_buffer *leaf; int ret; - int del_len = name_len + sizeof(*extref); + int del_len = fname_len(fname) + sizeof(*extref); unsigned long ptr; unsigned long item_start; u32 item_size; key.objectid = inode_objectid; key.type = BTRFS_INODE_EXTREF_KEY; - key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + key.offset = btrfs_extref_hash(ref_objectid, fname); path = btrfs_alloc_path(); if (!path) @@ -132,7 +134,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, * readonly. */ extref = btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], - ref_objectid, name, name_len); + ref_objectid, fname); if (!extref) { btrfs_handle_fs_error(root->fs_info, -ENOENT, NULL); ret = -EROFS; @@ -169,7 +171,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, u64 *index) { struct btrfs_path *path; @@ -182,7 +184,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, u32 sub_item_len; int ret; int search_ext_refs = 0; - int del_len = name_len + sizeof(*ref); + int del_len = fname_len(fname) + sizeof(*ref); key.objectid = inode_objectid; key.offset = ref_objectid; @@ -201,8 +203,8 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, goto out; } - ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], name, - name_len); + ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], + fname); if (!ref) { ret = -ENOENT; search_ext_refs = 1; @@ -219,7 +221,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, goto out; } ptr = (unsigned long)ref; - sub_item_len = name_len + sizeof(*ref); + sub_item_len = fname_len(fname) + sizeof(*ref); item_start = btrfs_item_ptr_offset(leaf, path->slots[0]); memmove_extent_buffer(leaf, ptr, ptr + sub_item_len, item_size - (ptr + sub_item_len - item_start)); @@ -233,8 +235,9 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, * name in our ref array. Find and remove the extended * inode ref then. */ - return btrfs_del_inode_extref(trans, root, name, name_len, - inode_objectid, ref_objectid, index); + return btrfs_del_inode_extref(trans, root, fname, + inode_objectid, ref_objectid, + index); } return ret; @@ -247,12 +250,12 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, */ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, u64 index) { struct btrfs_inode_extref *extref; int ret; - int ins_len = name_len + sizeof(*extref); + int ins_len = fname_len(fname) + sizeof(*extref); unsigned long ptr; struct btrfs_path *path; struct btrfs_key key; @@ -260,7 +263,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, key.objectid = inode_objectid; key.type = BTRFS_INODE_EXTREF_KEY; - key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + key.offset = btrfs_extref_hash(ref_objectid, fname); path = btrfs_alloc_path(); if (!path) @@ -272,7 +275,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, if (btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], ref_objectid, - name, name_len)) + fname)) goto out; btrfs_extend_item(path, ins_len); @@ -286,12 +289,13 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, ptr += btrfs_item_size(leaf, path->slots[0]) - ins_len; extref = (struct btrfs_inode_extref *)ptr; - btrfs_set_inode_extref_name_len(path->nodes[0], extref, name_len); + btrfs_set_inode_extref_name_len(path->nodes[0], extref, fname_len(fname)); btrfs_set_inode_extref_index(path->nodes[0], extref, index); btrfs_set_inode_extref_parent(path->nodes[0], extref, ref_objectid); ptr = (unsigned long)&extref->name; - write_extent_buffer(path->nodes[0], name, ptr, name_len); + write_extent_buffer(path->nodes[0], fname_name(fname), ptr, + fname_len(fname)); btrfs_mark_buffer_dirty(path->nodes[0]); out: @@ -302,7 +306,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, /* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, u64 index) { struct btrfs_fs_info *fs_info = root->fs_info; @@ -311,7 +315,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_inode_ref *ref; unsigned long ptr; int ret; - int ins_len = name_len + sizeof(*ref); + int ins_len = fname_len(fname) + sizeof(*ref); key.objectid = inode_objectid; key.offset = ref_objectid; @@ -327,7 +331,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, if (ret == -EEXIST) { u32 old_size; ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], - name, name_len); + fname); if (ref) goto out; @@ -336,7 +340,8 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, ref = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_inode_ref); ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size); - btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len); + btrfs_set_inode_ref_name_len(path->nodes[0], ref, + fname_len(fname)); btrfs_set_inode_ref_index(path->nodes[0], ref, index); ptr = (unsigned long)(ref + 1); ret = 0; @@ -344,7 +349,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, if (ret == -EOVERFLOW) { if (btrfs_find_name_in_backref(path->nodes[0], path->slots[0], - name, name_len)) + fname)) ret = -EEXIST; else ret = -EMLINK; @@ -353,11 +358,13 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, } else { ref = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_inode_ref); - btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len); + btrfs_set_inode_ref_name_len(path->nodes[0], ref, + fname_len(fname)); btrfs_set_inode_ref_index(path->nodes[0], ref, index); ptr = (unsigned long)(ref + 1); } - write_extent_buffer(path->nodes[0], name, ptr, name_len); + write_extent_buffer(path->nodes[0], fname_name(fname), ptr, + fname_len(fname)); btrfs_mark_buffer_dirty(path->nodes[0]); out: @@ -369,8 +376,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, * add an extended ref. */ if (btrfs_super_incompat_flags(disk_super) & BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) - ret = btrfs_insert_inode_extref(trans, root, name, - name_len, + ret = btrfs_insert_inode_extref(trans, root, fname, inode_objectid, ref_objectid, index); } diff --git a/fs/btrfs/inode-item.h b/fs/btrfs/inode-item.h index a8fc16d0147f..d55f9d6f17dd 100644 --- a/fs/btrfs/inode-item.h +++ b/fs/btrfs/inode-item.h @@ -65,11 +65,11 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, struct btrfs_truncate_control *control); int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, u64 index); int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, u64 *index); int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -82,15 +82,15 @@ struct btrfs_inode_extref *btrfs_lookup_inode_extref( struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 inode_objectid, u64 ref_objectid, int ins_len, int cow); -struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, - int slot, const char *name, - int name_len); +struct btrfs_inode_ref * +btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, + const struct fscrypt_name *fname); struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( struct extent_buffer *leaf, int slot, u64 ref_objectid, - const char *name, int name_len); + const struct fscrypt_name *fname); #endif diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index e47a1a38256f..dbb2ef802b9a 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3867,11 +3867,19 @@ static noinline int acls_after_inode_item(struct extent_buffer *leaf, static u64 xattr_default = 0; int scanned = 0; + struct fscrypt_name name_access = { + .disk_name = FSTR_INIT(XATTR_NAME_POSIX_ACL_ACCESS, + strlen(XATTR_NAME_POSIX_ACL_ACCESS)) + }; + + struct fscrypt_name name_default = { + .disk_name = FSTR_INIT(XATTR_NAME_POSIX_ACL_DEFAULT, + strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) + }; + if (!xattr_access) { - xattr_access = btrfs_name_hash(XATTR_NAME_POSIX_ACL_ACCESS, - strlen(XATTR_NAME_POSIX_ACL_ACCESS)); - xattr_default = btrfs_name_hash(XATTR_NAME_POSIX_ACL_DEFAULT, - strlen(XATTR_NAME_POSIX_ACL_DEFAULT)); + xattr_access = btrfs_name_hash(&name_access); + xattr_default = btrfs_name_hash(&name_default); } slot++; @@ -4258,7 +4266,7 @@ int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len, + const struct fscrypt_name *fname, struct btrfs_rename_ctx *rename_ctx) { struct btrfs_root *root = dir->root; @@ -4276,8 +4284,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, goto out; } - di = btrfs_lookup_dir_item(trans, root, path, dir_ino, - name, name_len, -1); + di = btrfs_lookup_dir_item(trans, root, path, dir_ino, fname, -1); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto err; @@ -4305,12 +4312,11 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, } } - ret = btrfs_del_inode_ref(trans, root, name, name_len, ino, - dir_ino, &index); + ret = btrfs_del_inode_ref(trans, root, fname, ino, dir_ino, &index); if (ret) { btrfs_info(fs_info, "failed to delete reference to %.*s, inode %llu parent %llu", - name_len, name, ino, dir_ino); + fname_len(fname), fname_name(fname), ino, dir_ino); btrfs_abort_transaction(trans, ret); goto err; } @@ -4331,10 +4337,8 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, * operations on the log tree, increasing latency for applications. */ if (!rename_ctx) { - btrfs_del_inode_ref_in_log(trans, root, name, name_len, inode, - dir_ino); - btrfs_del_dir_entries_in_log(trans, root, name, name_len, dir, - index); + btrfs_del_inode_ref_in_log(trans, root, fname, inode, dir_ino); + btrfs_del_dir_entries_in_log(trans, root, fname, dir, index); } /* @@ -4352,7 +4356,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, if (ret) goto out; - btrfs_i_size_write(dir, dir->vfs_inode.i_size - name_len * 2); + btrfs_i_size_write(dir, dir->vfs_inode.i_size - fname_len(fname) * 2); inode_inc_iversion(&inode->vfs_inode); inode_inc_iversion(&dir->vfs_inode); inode->vfs_inode.i_ctime = current_time(&inode->vfs_inode); @@ -4365,10 +4369,10 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, int btrfs_unlink_inode(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len) + const struct fscrypt_name *fname) { int ret; - ret = __btrfs_unlink_inode(trans, dir, inode, name, name_len, NULL); + ret = __btrfs_unlink_inode(trans, dir, inode, fname, NULL); if (!ret) { drop_nlink(&inode->vfs_inode); ret = btrfs_update_inode(trans, inode->root, inode); @@ -4404,6 +4408,10 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry) struct btrfs_trans_handle *trans; struct inode *inode = d_inode(dentry); int ret; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((unsigned char *)dentry->d_name.name, dentry->d_name.len) + }; + trans = __unlink_start_trans(dir); if (IS_ERR(trans)) @@ -4413,8 +4421,7 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry) 0); ret = btrfs_unlink_inode(trans, BTRFS_I(dir), - BTRFS_I(d_inode(dentry)), dentry->d_name.name, - dentry->d_name.len); + BTRFS_I(d_inode(dentry)), &fname); if (ret) goto out; @@ -4439,12 +4446,14 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, struct extent_buffer *leaf; struct btrfs_dir_item *di; struct btrfs_key key; - const char *name = dentry->d_name.name; - int name_len = dentry->d_name.len; u64 index; int ret; u64 objectid; u64 dir_ino = btrfs_ino(BTRFS_I(dir)); + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) dentry->d_name.name, + dentry->d_name.len) + }; if (btrfs_ino(inode) == BTRFS_FIRST_FREE_OBJECTID) { objectid = inode->root->root_key.objectid; @@ -4459,8 +4468,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, if (!path) return -ENOMEM; - di = btrfs_lookup_dir_item(trans, root, path, dir_ino, - name, name_len, -1); + di = btrfs_lookup_dir_item(trans, root, path, dir_ino, &fname, -1); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto out; @@ -4486,8 +4494,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, * call btrfs_del_root_ref, and it _shouldn't_ fail. */ if (btrfs_ino(inode) == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID) { - di = btrfs_search_dir_index_item(root, path, dir_ino, - name, name_len); + di = btrfs_search_dir_index_item(root, path, dir_ino, &fname); if (IS_ERR_OR_NULL(di)) { if (!di) ret = -ENOENT; @@ -4504,7 +4511,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, } else { ret = btrfs_del_root_ref(trans, objectid, root->root_key.objectid, dir_ino, - &index, name, name_len); + &index, &fname); if (ret) { btrfs_abort_transaction(trans, ret); goto out; @@ -4517,7 +4524,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, goto out; } - btrfs_i_size_write(BTRFS_I(dir), dir->i_size - name_len * 2); + btrfs_i_size_write(BTRFS_I(dir), dir->i_size - fname_len(&fname) * 2); inode_inc_iversion(dir); dir->i_mtime = current_time(dir); dir->i_ctime = dir->i_mtime; @@ -4541,6 +4548,10 @@ static noinline int may_destroy_subvol(struct btrfs_root *root) struct btrfs_key key; u64 dir_id; int ret; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT("default", 7) + }; + path = btrfs_alloc_path(); if (!path) @@ -4549,7 +4560,7 @@ static noinline int may_destroy_subvol(struct btrfs_root *root) /* Make sure this root isn't set as the default subvol */ dir_id = btrfs_super_root_dir(fs_info->super_copy); di = btrfs_lookup_dir_item(NULL, fs_info->tree_root, path, - dir_id, "default", 7, 0); + dir_id, &fname, 0); if (di && !IS_ERR(di)) { btrfs_dir_item_key_to_cpu(path->nodes[0], di, &key); if (key.objectid == root->root_key.objectid) { @@ -4788,6 +4799,9 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) int err = 0; struct btrfs_trans_handle *trans; u64 last_unlink_trans; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((unsigned char *)dentry->d_name.name, dentry->d_name.len) + }; if (inode->i_size > BTRFS_EMPTY_DIR_SIZE) return -ENOTEMPTY; @@ -4817,8 +4831,7 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) /* now the directory is empty */ err = btrfs_unlink_inode(trans, BTRFS_I(dir), - BTRFS_I(d_inode(dentry)), dentry->d_name.name, - dentry->d_name.len); + BTRFS_I(d_inode(dentry)), &fname); if (!err) { btrfs_i_size_write(BTRFS_I(inode), 0); /* @@ -5539,19 +5552,21 @@ void btrfs_evict_inode(struct inode *inode) static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry, struct btrfs_key *location, u8 *type) { - const char *name = dentry->d_name.name; - int namelen = dentry->d_name.len; struct btrfs_dir_item *di; struct btrfs_path *path; struct btrfs_root *root = BTRFS_I(dir)->root; int ret = 0; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) dentry->d_name.name, + dentry->d_name.len) + }; path = btrfs_alloc_path(); if (!path) return -ENOMEM; di = btrfs_lookup_dir_item(NULL, root, path, btrfs_ino(BTRFS_I(dir)), - name, namelen, 0); + &fname, 0); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto out; @@ -5563,7 +5578,7 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry, ret = -EUCLEAN; btrfs_warn(root->fs_info, "%s gets something invalid in DIR_ITEM (name %s, directory ino %llu, location(%llu %u %llu))", - __func__, name, btrfs_ino(BTRFS_I(dir)), + __func__, fname_name(&fname), btrfs_ino(BTRFS_I(dir)), location->objectid, location->type, location->offset); } if (!ret) @@ -6247,6 +6262,14 @@ int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args, if (ret) return ret; + if (!args->orphan) { + char *name = (char *) args->dentry->d_name.name; + int name_len = args->dentry->d_name.len; + args->fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, name_len), + }; + } + /* 1 to add inode item */ *trans_num_items = 1; /* 1 to add compression property */ @@ -6320,8 +6343,6 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, { struct inode *dir = args->dir; struct inode *inode = args->inode; - const char *name = args->orphan ? NULL : args->dentry->d_name.name; - int name_len = args->orphan ? 0 : args->dentry->d_name.len; struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb); struct btrfs_root *root; struct btrfs_inode_item *inode_item; @@ -6422,7 +6443,7 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, sizes[1] = 2 + sizeof(*ref); } else { key[1].offset = btrfs_ino(BTRFS_I(dir)); - sizes[1] = name_len + sizeof(*ref); + sizes[1] = fname_len(&args->fname) + sizeof(*ref); } } @@ -6461,10 +6482,13 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, btrfs_set_inode_ref_index(path->nodes[0], ref, 0); write_extent_buffer(path->nodes[0], "..", ptr, 2); } else { - btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len); + btrfs_set_inode_ref_name_len(path->nodes[0], ref, + fname_len(&args->fname)); btrfs_set_inode_ref_index(path->nodes[0], ref, BTRFS_I(inode)->dir_index); - write_extent_buffer(path->nodes[0], name, ptr, name_len); + write_extent_buffer(path->nodes[0], + fname_name(&args->fname), ptr, + fname_len(&args->fname)); } } @@ -6524,8 +6548,9 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, if (args->orphan) { ret = btrfs_orphan_add(trans, BTRFS_I(inode)); } else { - ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), name, - name_len, 0, BTRFS_I(inode)->dir_index); + ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), + &args->fname, 0, + BTRFS_I(inode)->dir_index); } if (ret) { btrfs_abort_transaction(trans, ret); @@ -6554,7 +6579,7 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, */ int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_inode *parent_inode, struct btrfs_inode *inode, - const char *name, int name_len, int add_backref, u64 index) + const struct fscrypt_name *fname, int add_backref, u64 index) { int ret = 0; struct btrfs_key key; @@ -6573,17 +6598,17 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, if (unlikely(ino == BTRFS_FIRST_FREE_OBJECTID)) { ret = btrfs_add_root_ref(trans, key.objectid, root->root_key.objectid, parent_ino, - index, name, name_len); + index, fname); } else if (add_backref) { - ret = btrfs_insert_inode_ref(trans, root, name, name_len, ino, - parent_ino, index); + ret = btrfs_insert_inode_ref(trans, root, fname, ino, parent_ino, + index); } /* Nothing to clean up yet */ if (ret) return ret; - ret = btrfs_insert_dir_item(trans, name, name_len, parent_inode, &key, + ret = btrfs_insert_dir_item(trans, fname, parent_inode, &key, btrfs_inode_type(&inode->vfs_inode), index); if (ret == -EEXIST || ret == -EOVERFLOW) goto fail_dir_item; @@ -6593,7 +6618,7 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, } btrfs_i_size_write(parent_inode, parent_inode->vfs_inode.i_size + - name_len * 2); + fname_len(fname) * 2); inode_inc_iversion(&parent_inode->vfs_inode); /* * If we are replaying a log tree, we do not want to update the mtime @@ -6616,17 +6641,18 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, if (unlikely(ino == BTRFS_FIRST_FREE_OBJECTID)) { u64 local_index; int err; + err = btrfs_del_root_ref(trans, key.objectid, root->root_key.objectid, parent_ino, - &local_index, name, name_len); + &local_index, fname); if (err) btrfs_abort_transaction(trans, err); } else if (add_backref) { u64 local_index; int err; - err = btrfs_del_inode_ref(trans, root, name, name_len, - ino, parent_ino, &local_index); + err = btrfs_del_inode_ref(trans, root, fname, ino, + parent_ino, &local_index); if (err) btrfs_abort_transaction(trans, err); } @@ -6709,6 +6735,10 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, struct btrfs_root *root = BTRFS_I(dir)->root; struct inode *inode = d_inode(old_dentry); struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) dentry->d_name.name, + dentry->d_name.len) + }; u64 index; int err; int drop_inode = 0; @@ -6745,8 +6775,8 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, ihold(inode); set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags); - err = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), - dentry->d_name.name, dentry->d_name.len, 1, index); + err = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), &fname, 1, + index); if (err) { drop_inode = 1; @@ -9151,6 +9181,14 @@ static int btrfs_rename_exchange(struct inode *old_dir, int ret; int ret2; bool need_abort = false; + struct fscrypt_name old_name = { + .disk_name = FSTR_INIT((char *) old_dentry->d_name.name, + old_dentry->d_name.len) + }; + struct fscrypt_name new_name = { + .disk_name = FSTR_INIT((char *) new_dentry->d_name.name, + new_dentry->d_name.len) + }; /* * For non-subvolumes allow exchange only within one subvolume, in the @@ -9229,10 +9267,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, /* force full log commit if subvolume involved. */ btrfs_set_log_full_commit(trans); } else { - ret = btrfs_insert_inode_ref(trans, dest, - new_dentry->d_name.name, - new_dentry->d_name.len, - old_ino, + ret = btrfs_insert_inode_ref(trans, dest, &new_name, old_ino, btrfs_ino(BTRFS_I(new_dir)), old_idx); if (ret) @@ -9245,10 +9280,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, /* force full log commit if subvolume involved. */ btrfs_set_log_full_commit(trans); } else { - ret = btrfs_insert_inode_ref(trans, root, - old_dentry->d_name.name, - old_dentry->d_name.len, - new_ino, + ret = btrfs_insert_inode_ref(trans, root, &old_name, new_ino, btrfs_ino(BTRFS_I(old_dir)), new_idx); if (ret) { @@ -9282,9 +9314,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, ret = btrfs_unlink_subvol(trans, old_dir, old_dentry); } else { /* src is an inode */ ret = __btrfs_unlink_inode(trans, BTRFS_I(old_dir), - BTRFS_I(old_dentry->d_inode), - old_dentry->d_name.name, - old_dentry->d_name.len, + BTRFS_I(old_dentry->d_inode), &old_name, &old_rename_ctx); if (!ret) ret = btrfs_update_inode(trans, root, BTRFS_I(old_inode)); @@ -9299,9 +9329,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, ret = btrfs_unlink_subvol(trans, new_dir, new_dentry); } else { /* dest is an inode */ ret = __btrfs_unlink_inode(trans, BTRFS_I(new_dir), - BTRFS_I(new_dentry->d_inode), - new_dentry->d_name.name, - new_dentry->d_name.len, + BTRFS_I(new_dentry->d_inode), &new_name, &new_rename_ctx); if (!ret) ret = btrfs_update_inode(trans, dest, BTRFS_I(new_inode)); @@ -9312,16 +9340,14 @@ static int btrfs_rename_exchange(struct inode *old_dir, } ret = btrfs_add_link(trans, BTRFS_I(new_dir), BTRFS_I(old_inode), - new_dentry->d_name.name, - new_dentry->d_name.len, 0, old_idx); + &new_name, 0, old_idx); if (ret) { btrfs_abort_transaction(trans, ret); goto out_fail; } ret = btrfs_add_link(trans, BTRFS_I(old_dir), BTRFS_I(new_inode), - old_dentry->d_name.name, - old_dentry->d_name.len, 0, new_idx); + &old_name, 0, new_idx); if (ret) { btrfs_abort_transaction(trans, ret); goto out_fail; @@ -9403,6 +9429,14 @@ static int btrfs_rename(struct user_namespace *mnt_userns, int ret; int ret2; u64 old_ino = btrfs_ino(BTRFS_I(old_inode)); + struct fscrypt_name old_fname = { + .disk_name = FSTR_INIT((char *)old_dentry->d_name.name, + old_dentry->d_name.len) + }; + struct fscrypt_name new_fname = { + .disk_name = FSTR_INIT((char *)new_dentry->d_name.name, + new_dentry->d_name.len) + }; if (btrfs_ino(BTRFS_I(new_dir)) == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID) return -EPERM; @@ -9419,11 +9453,8 @@ static int btrfs_rename(struct user_namespace *mnt_userns, new_inode->i_size > BTRFS_EMPTY_DIR_SIZE) return -ENOTEMPTY; - /* check for collisions, even if the name isn't there */ - ret = btrfs_check_dir_item_collision(dest, new_dir->i_ino, - new_dentry->d_name.name, - new_dentry->d_name.len); + ret = btrfs_check_dir_item_collision(dest, new_dir->i_ino, &new_fname); if (ret) { if (ret == -EEXIST) { @@ -9517,11 +9548,9 @@ static int btrfs_rename(struct user_namespace *mnt_userns, /* force full log commit if subvolume involved. */ btrfs_set_log_full_commit(trans); } else { - ret = btrfs_insert_inode_ref(trans, dest, - new_dentry->d_name.name, - new_dentry->d_name.len, - old_ino, - btrfs_ino(BTRFS_I(new_dir)), index); + ret = btrfs_insert_inode_ref(trans, dest, &new_fname, old_ino, + btrfs_ino(BTRFS_I(new_dir)), + index); if (ret) goto out_fail; } @@ -9544,9 +9573,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, } else { ret = __btrfs_unlink_inode(trans, BTRFS_I(old_dir), BTRFS_I(d_inode(old_dentry)), - old_dentry->d_name.name, - old_dentry->d_name.len, - &rename_ctx); + &old_fname, &rename_ctx); if (!ret) ret = btrfs_update_inode(trans, root, BTRFS_I(old_inode)); } @@ -9565,8 +9592,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, } else { ret = btrfs_unlink_inode(trans, BTRFS_I(new_dir), BTRFS_I(d_inode(new_dentry)), - new_dentry->d_name.name, - new_dentry->d_name.len); + &new_fname); } if (!ret && new_inode->i_nlink == 0) ret = btrfs_orphan_add(trans, @@ -9578,8 +9604,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, } ret = btrfs_add_link(trans, BTRFS_I(new_dir), BTRFS_I(old_inode), - new_dentry->d_name.name, - new_dentry->d_name.len, 0, index); + &new_fname, 0, index); if (ret) { btrfs_abort_transaction(trans, ret); goto out_fail; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index fe0cc816b4eb..10b8db56edda 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -941,7 +941,7 @@ static inline int btrfs_may_create(struct user_namespace *mnt_userns, */ static noinline int btrfs_mksubvol(const struct path *parent, struct user_namespace *mnt_userns, - const char *name, int namelen, + struct fscrypt_name *fname, struct btrfs_root *snap_src, bool readonly, struct btrfs_qgroup_inherit *inherit) @@ -955,7 +955,8 @@ static noinline int btrfs_mksubvol(const struct path *parent, if (error == -EINTR) return error; - dentry = lookup_one(mnt_userns, name, parent->dentry, namelen); + dentry = lookup_one(mnt_userns, fname_name(fname), parent->dentry, + fname_len(fname)); error = PTR_ERR(dentry); if (IS_ERR(dentry)) goto out_unlock; @@ -969,8 +970,7 @@ static noinline int btrfs_mksubvol(const struct path *parent, * check for them now when we can safely fail */ error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root, - dir->i_ino, name, - namelen); + dir->i_ino, fname); if (error) goto out_dput; @@ -997,7 +997,7 @@ static noinline int btrfs_mksubvol(const struct path *parent, static noinline int btrfs_mksnapshot(const struct path *parent, struct user_namespace *mnt_userns, - const char *name, int namelen, + struct fscrypt_name *fname, struct btrfs_root *root, bool readonly, struct btrfs_qgroup_inherit *inherit) @@ -1026,7 +1026,7 @@ static noinline int btrfs_mksnapshot(const struct path *parent, btrfs_wait_ordered_extents(root, U64_MAX, 0, (u64)-1); - ret = btrfs_mksubvol(parent, mnt_userns, name, namelen, + ret = btrfs_mksubvol(parent, mnt_userns, fname, root, readonly, inherit); out: if (snapshot_force_cow) @@ -2138,6 +2138,7 @@ static noinline int __btrfs_ioctl_snap_create(struct file *file, { int namelen; int ret = 0; + struct fscrypt_name fname; if (!S_ISDIR(file_inode(file)->i_mode)) return -ENOTDIR; @@ -2158,9 +2159,12 @@ static noinline int __btrfs_ioctl_snap_create(struct file *file, goto out_drop_write; } + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT((char *) name, namelen) + }; if (subvol) { - ret = btrfs_mksubvol(&file->f_path, mnt_userns, name, - namelen, NULL, readonly, inherit); + ret = btrfs_mksubvol(&file->f_path, mnt_userns, &fname, + NULL, readonly, inherit); } else { struct fd src = fdget(fd); struct inode *src_inode; @@ -2182,8 +2186,7 @@ static noinline int __btrfs_ioctl_snap_create(struct file *file, ret = -EPERM; } else { ret = btrfs_mksnapshot(&file->f_path, mnt_userns, - name, namelen, - BTRFS_I(src_inode)->root, + &fname, BTRFS_I(src_inode)->root, readonly, inherit); } fdput(src); @@ -3777,6 +3780,10 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) u64 objectid = 0; u64 dir_id; int ret; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT("default", 7) + }; + if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -3817,7 +3824,7 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) dir_id = btrfs_super_root_dir(fs_info->super_copy); di = btrfs_lookup_dir_item(trans, fs_info->tree_root, path, - dir_id, "default", 7, 1); + dir_id, &fname, 1); if (IS_ERR_OR_NULL(di)) { btrfs_release_path(path); btrfs_end_transaction(trans); diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c index a2ec8ecae8de..0df607fcb21d 100644 --- a/fs/btrfs/props.c +++ b/fs/btrfs/props.c @@ -43,7 +43,10 @@ find_prop_handler(const char *name, struct prop_handler *h; if (!handlers) { - u64 hash = btrfs_name_hash(name, strlen(name)); + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) name, strlen(name)), + }; + u64 hash = btrfs_name_hash(&fname); handlers = find_prop_handlers_by_hash(hash); if (!handlers) @@ -462,7 +465,11 @@ void __init btrfs_props_init(void) for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) { struct prop_handler *p = &prop_handlers[i]; - u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name)); + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *)p->xattr_name, + strlen(p->xattr_name)), + }; + u64 h = btrfs_name_hash(&fname); hash_add(prop_handlers_ht, &p->node, h); } diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index a64b26b16904..8eb6cbe19326 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -327,8 +327,8 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, } int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 *sequence, const char *name, - int name_len) + u64 ref_id, u64 dirid, u64 *sequence, + const struct fscrypt_name *fname) { struct btrfs_root *tree_root = trans->fs_info->tree_root; @@ -357,8 +357,9 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, struct btrfs_root_ref); ptr = (unsigned long)(ref + 1); if ((btrfs_root_ref_dirid(leaf, ref) != dirid) || - (btrfs_root_ref_name_len(leaf, ref) != name_len) || - memcmp_extent_buffer(leaf, name, ptr, name_len)) { + (btrfs_root_ref_name_len(leaf, ref) != fname_len(fname)) || + memcmp_extent_buffer(leaf, fname_name(fname), ptr, + fname_len(fname))) { err = -ENOENT; goto out; } @@ -401,8 +402,8 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, * Will return 0, -ENOMEM, or anything from the CoW path */ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 sequence, const char *name, - int name_len) + u64 ref_id, u64 dirid, u64 sequence, + const struct fscrypt_name *fname) { struct btrfs_root *tree_root = trans->fs_info->tree_root; struct btrfs_key key; @@ -421,7 +422,7 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, key.offset = ref_id; again: ret = btrfs_insert_empty_item(trans, tree_root, path, &key, - sizeof(*ref) + name_len); + sizeof(*ref) + fname_len(fname)); if (ret) { btrfs_abort_transaction(trans, ret); btrfs_free_path(path); @@ -432,9 +433,9 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_ref); btrfs_set_root_ref_dirid(leaf, ref, dirid); btrfs_set_root_ref_sequence(leaf, ref, sequence); - btrfs_set_root_ref_name_len(leaf, ref, name_len); + btrfs_set_root_ref_name_len(leaf, ref, fname_len(fname)); ptr = (unsigned long)(ref + 1); - write_extent_buffer(leaf, name, ptr, name_len); + write_extent_buffer(leaf, fname_name(fname), ptr, fname_len(fname)); btrfs_mark_buffer_dirty(leaf); if (key.type == BTRFS_ROOT_BACKREF_KEY) { diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index b02e991b2c06..061dbfeccbeb 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -15,6 +15,7 @@ #include <linux/string.h> #include <linux/compat.h> #include <linux/crc32c.h> +#include <linux/fscrypt.h> #include "send.h" #include "ctree.h" @@ -1023,7 +1024,7 @@ static int iterate_inode_ref(struct btrfs_root *root, struct btrfs_path *path, } typedef int (*iterate_dir_item_t)(int num, struct btrfs_key *di_key, - const char *name, int name_len, + struct fscrypt_name *fname, const char *data, int data_len, void *ctx); @@ -1073,6 +1074,7 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path, num = 0; while (cur < total) { + struct fscrypt_name fname; name_len = btrfs_dir_name_len(eb, di); data_len = btrfs_dir_data_len(eb, di); btrfs_dir_item_key_to_cpu(eb, di, &di_key); @@ -1125,8 +1127,11 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path, len = sizeof(*di) + name_len + data_len; di = (struct btrfs_dir_item *)((char *)di + len); cur += len; + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(buf, name_len) + }; - ret = iterate(num, &di_key, buf, name_len, buf + name_len, + ret = iterate(num, &di_key, &fname, buf + name_len, data_len, ctx); if (ret < 0) goto out; @@ -1580,13 +1585,17 @@ static int gen_unique_name(struct send_ctx *sctx, return -ENOMEM; while (1) { + struct fscrypt_name fname; len = snprintf(tmp, sizeof(tmp), "o%llu-%llu-%llu", ino, gen, idx); ASSERT(len < sizeof(tmp)); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(tmp, strlen(tmp)),//len) + }; di = btrfs_lookup_dir_item(NULL, sctx->send_root, path, BTRFS_FIRST_FREE_OBJECTID, - tmp, strlen(tmp), 0); + &fname, 0); btrfs_release_path(path); if (IS_ERR(di)) { ret = PTR_ERR(di); @@ -1606,7 +1615,7 @@ static int gen_unique_name(struct send_ctx *sctx, di = btrfs_lookup_dir_item(NULL, sctx->parent_root, path, BTRFS_FIRST_FREE_OBJECTID, - tmp, strlen(tmp), 0); + &fname, 0); btrfs_release_path(path); if (IS_ERR(di)) { ret = PTR_ERR(di); @@ -1728,7 +1737,7 @@ static int is_inode_existent(struct send_ctx *sctx, u64 ino, u64 gen) * Helper function to lookup a dir item in a dir. */ static int lookup_dir_item_inode(struct btrfs_root *root, - u64 dir, const char *name, int name_len, + u64 dir, struct fscrypt_name *fname, u64 *found_inode) { int ret = 0; @@ -1741,7 +1750,7 @@ static int lookup_dir_item_inode(struct btrfs_root *root, return -ENOMEM; di = btrfs_lookup_dir_item(NULL, root, path, - dir, name, name_len, 0); + dir, fname, 0); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto out; @@ -1831,7 +1840,7 @@ static int get_first_ref(struct btrfs_root *root, u64 ino, static int is_first_ref(struct btrfs_root *root, u64 ino, u64 dir, - const char *name, int name_len) + struct fscrypt_name *fname) { int ret; struct fs_path *tmp_name; @@ -1845,12 +1854,12 @@ static int is_first_ref(struct btrfs_root *root, if (ret < 0) goto out; - if (dir != tmp_dir || name_len != fs_path_len(tmp_name)) { + if (dir != tmp_dir || fname_len(fname) != fs_path_len(tmp_name)) { ret = 0; goto out; } - ret = !memcmp(tmp_name->start, name, name_len); + ret = !memcmp(tmp_name->start, fname_name(fname), fname_len(fname)); out: fs_path_free(tmp_name); @@ -1868,7 +1877,7 @@ static int is_first_ref(struct btrfs_root *root, * orphanizing is really required. */ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, - const char *name, int name_len, + struct fscrypt_name *fname, u64 *who_ino, u64 *who_gen, u64 *who_mode) { int ret = 0; @@ -1900,7 +1909,7 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, goto out; } - ret = lookup_dir_item_inode(sctx->parent_root, dir, name, name_len, + ret = lookup_dir_item_inode(sctx->parent_root, dir, fname, &other_inode); if (ret < 0 && ret != -ENOENT) goto out; @@ -1941,7 +1950,7 @@ static int will_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, static int did_overwrite_ref(struct send_ctx *sctx, u64 dir, u64 dir_gen, u64 ino, u64 ino_gen, - const char *name, int name_len) + struct fscrypt_name *fname) { int ret = 0; u64 gen; @@ -1968,7 +1977,7 @@ static int did_overwrite_ref(struct send_ctx *sctx, } /* check if the ref was overwritten by another ref */ - ret = lookup_dir_item_inode(sctx->send_root, dir, name, name_len, + ret = lookup_dir_item_inode(sctx->send_root, dir, fname, &ow_inode); if (ret < 0 && ret != -ENOENT) goto out; @@ -2016,7 +2025,7 @@ static int did_overwrite_first_ref(struct send_ctx *sctx, u64 ino, u64 gen) struct fs_path *name = NULL; u64 dir; u64 dir_gen; - + struct fscrypt_name fname; if (!sctx->parent_root) goto out; @@ -2028,8 +2037,12 @@ static int did_overwrite_first_ref(struct send_ctx *sctx, u64 ino, u64 gen) if (ret < 0) goto out; + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name->start, fs_path_len(name)) + }; + ret = did_overwrite_ref(sctx, dir, dir_gen, ino, gen, - name->start, fs_path_len(name)); + &fname); out: fs_path_free(name); @@ -2162,6 +2175,7 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, int ret; int nce_ret; struct name_cache_entry *nce = NULL; + struct fscrypt_name fname; /* * First check if we already did a call to this function with the same @@ -2226,8 +2240,11 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx, * Check if the ref was overwritten by an inode's ref that was processed * earlier. If yes, treat as orphan and return 1. */ + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(dest->start, fs_path_len(dest)) + }; ret = did_overwrite_ref(sctx, *parent_ino, *parent_gen, ino, gen, - dest->start, dest->end - dest->start); + &fname); if (ret < 0) goto out; if (ret) { @@ -3494,6 +3511,9 @@ static int wait_for_dest_dir_move(struct send_ctx *sctx, u64 right_gen; int ret = 0; struct waiting_dir_move *wdm; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT(parent_ref->name, parent_ref->name_len) + }; if (RB_EMPTY_ROOT(&sctx->waiting_dir_moves)) return 0; @@ -3504,7 +3524,7 @@ static int wait_for_dest_dir_move(struct send_ctx *sctx, key.objectid = parent_ref->dir; key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(parent_ref->name, parent_ref->name_len); + key.offset = btrfs_name_hash(&fname); ret = btrfs_search_slot(NULL, sctx->parent_root, &key, path, 0, 0); if (ret < 0) { @@ -3514,8 +3534,7 @@ static int wait_for_dest_dir_move(struct send_ctx *sctx, goto out; } - di = btrfs_match_dir_item_name(fs_info, path, parent_ref->name, - parent_ref->name_len); + di = btrfs_match_dir_item_name(fs_info, path, &fname); if (!di) { ret = 0; goto out; @@ -3996,6 +4015,10 @@ static int process_recorded_refs(struct send_ctx *sctx, int *pending_move) * "testdir_2". */ list_for_each_entry(cur, &sctx->new_refs, list) { + struct fscrypt_name fname = { + .disk_name = FSTR_INIT(cur->name, cur->name_len) + }; + ret = get_cur_inode_state(sctx, cur->dir, cur->dir_gen); if (ret < 0) goto out; @@ -4009,14 +4032,12 @@ static int process_recorded_refs(struct send_ctx *sctx, int *pending_move) * simply unlink it. */ ret = will_overwrite_ref(sctx, cur->dir, cur->dir_gen, - cur->name, cur->name_len, - &ow_inode, &ow_gen, &ow_mode); + &fname, &ow_inode, &ow_gen, &ow_mode); if (ret < 0) goto out; if (ret) { ret = is_first_ref(sctx->parent_root, - ow_inode, cur->dir, cur->name, - cur->name_len); + ow_inode, cur->dir, &fname); if (ret < 0) goto out; if (ret) { @@ -4262,9 +4283,13 @@ static int process_recorded_refs(struct send_ctx *sctx, int *pending_move) * inodes. */ list_for_each_entry(cur, &sctx->deleted_refs, list) { + struct fscrypt_name fname = { + .disk_name = FSTR_INIT(cur->name, cur->name_len) + }; + ret = did_overwrite_ref(sctx, cur->dir, cur->dir_gen, sctx->cur_ino, sctx->cur_inode_gen, - cur->name, cur->name_len); + &fname); if (ret < 0) goto out; if (!ret) { @@ -4606,7 +4631,7 @@ static int process_all_refs(struct send_ctx *sctx, static int send_set_xattr(struct send_ctx *sctx, struct fs_path *path, - const char *name, int name_len, + struct fscrypt_name *fname, const char *data, int data_len) { int ret = 0; @@ -4616,7 +4641,8 @@ static int send_set_xattr(struct send_ctx *sctx, goto out; TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, path); - TLV_PUT_STRING(sctx, BTRFS_SEND_A_XATTR_NAME, name, name_len); + TLV_PUT_STRING(sctx, BTRFS_SEND_A_XATTR_NAME, fname_name(fname), + fname_len(fname)); TLV_PUT(sctx, BTRFS_SEND_A_XATTR_DATA, data, data_len); ret = send_cmd(sctx); @@ -4628,7 +4654,7 @@ static int send_set_xattr(struct send_ctx *sctx, static int send_remove_xattr(struct send_ctx *sctx, struct fs_path *path, - const char *name, int name_len) + struct fscrypt_name *fname) { int ret = 0; @@ -4637,7 +4663,8 @@ static int send_remove_xattr(struct send_ctx *sctx, goto out; TLV_PUT_PATH(sctx, BTRFS_SEND_A_PATH, path); - TLV_PUT_STRING(sctx, BTRFS_SEND_A_XATTR_NAME, name, name_len); + TLV_PUT_STRING(sctx, BTRFS_SEND_A_XATTR_NAME, fname_name(fname), + fname_len(fname)); ret = send_cmd(sctx); @@ -4647,7 +4674,7 @@ static int send_remove_xattr(struct send_ctx *sctx, } static int __process_new_xattr(int num, struct btrfs_key *di_key, - const char *name, int name_len, const char *data, + struct fscrypt_name *fname, const char *data, int data_len, void *ctx) { int ret; @@ -4656,7 +4683,7 @@ static int __process_new_xattr(int num, struct btrfs_key *di_key, struct posix_acl_xattr_header dummy_acl; /* Capabilities are emitted by finish_inode_if_needed */ - if (!strncmp(name, XATTR_NAME_CAPS, name_len)) + if (!strncmp(fname_name(fname), XATTR_NAME_CAPS, fname_len(fname))) return 0; p = fs_path_alloc(); @@ -4669,8 +4696,10 @@ static int __process_new_xattr(int num, struct btrfs_key *di_key, * acls will fail later. To fix this, we send a dummy acl list that * only contains the version number and no entries. */ - if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, name_len) || - !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, name_len)) { + if (!strncmp(fname_name(fname), XATTR_NAME_POSIX_ACL_ACCESS, + fname_len(fname)) || + !strncmp(fname_name(fname), XATTR_NAME_POSIX_ACL_DEFAULT, + fname_len(fname))) { if (data_len == 0) { dummy_acl.a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION); @@ -4683,7 +4712,7 @@ static int __process_new_xattr(int num, struct btrfs_key *di_key, if (ret < 0) goto out; - ret = send_set_xattr(sctx, p, name, name_len, data, data_len); + ret = send_set_xattr(sctx, p, fname, data, data_len); out: fs_path_free(p); @@ -4691,7 +4720,7 @@ static int __process_new_xattr(int num, struct btrfs_key *di_key, } static int __process_deleted_xattr(int num, struct btrfs_key *di_key, - const char *name, int name_len, + struct fscrypt_name *fname, const char *data, int data_len, void *ctx) { int ret; @@ -4706,7 +4735,7 @@ static int __process_deleted_xattr(int num, struct btrfs_key *di_key, if (ret < 0) goto out; - ret = send_remove_xattr(sctx, p, name, name_len); + ret = send_remove_xattr(sctx, p, fname); out: fs_path_free(p); @@ -4730,20 +4759,21 @@ static int process_deleted_xattr(struct send_ctx *sctx) } struct find_xattr_ctx { - const char *name; - int name_len; + struct fscrypt_name *fname; int found_idx; char *found_data; int found_data_len; }; -static int __find_xattr(int num, struct btrfs_key *di_key, const char *name, - int name_len, const char *data, int data_len, void *vctx) +static int __find_xattr(int num, struct btrfs_key *di_key, + struct fscrypt_name *fname, + const char *data, int data_len, void *vctx) { struct find_xattr_ctx *ctx = vctx; - if (name_len == ctx->name_len && - strncmp(name, ctx->name, name_len) == 0) { + if (fname_len(fname) == fname_len(ctx->fname) && + strncmp(fname_name(fname), fname_name(ctx->fname), + fname_len(fname)) == 0) { ctx->found_idx = num; ctx->found_data_len = data_len; ctx->found_data = kmemdup(data, data_len, GFP_KERNEL); @@ -4757,14 +4787,13 @@ static int __find_xattr(int num, struct btrfs_key *di_key, const char *name, static int find_xattr(struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *key, - const char *name, int name_len, + struct fscrypt_name *fname, char **data, int *data_len) { int ret; struct find_xattr_ctx ctx; - ctx.name = name; - ctx.name_len = name_len; + ctx.fname = fname; ctx.found_idx = -1; ctx.found_data = NULL; ctx.found_data_len = 0; @@ -4786,7 +4815,7 @@ static int find_xattr(struct btrfs_root *root, static int __process_changed_new_xattr(int num, struct btrfs_key *di_key, - const char *name, int name_len, + struct fscrypt_name *fname, const char *data, int data_len, void *ctx) { @@ -4796,15 +4825,15 @@ static int __process_changed_new_xattr(int num, struct btrfs_key *di_key, int found_data_len = 0; ret = find_xattr(sctx->parent_root, sctx->right_path, - sctx->cmp_key, name, name_len, &found_data, + sctx->cmp_key, fname, &found_data, &found_data_len); if (ret == -ENOENT) { - ret = __process_new_xattr(num, di_key, name, name_len, data, + ret = __process_new_xattr(num, di_key, fname, data, data_len, ctx); } else if (ret >= 0) { if (data_len != found_data_len || memcmp(data, found_data, data_len)) { - ret = __process_new_xattr(num, di_key, name, name_len, + ret = __process_new_xattr(num, di_key, fname, data, data_len, ctx); } else { ret = 0; @@ -4816,7 +4845,7 @@ static int __process_changed_new_xattr(int num, struct btrfs_key *di_key, } static int __process_changed_deleted_xattr(int num, struct btrfs_key *di_key, - const char *name, int name_len, + struct fscrypt_name *fname, const char *data, int data_len, void *ctx) { @@ -4824,9 +4853,9 @@ static int __process_changed_deleted_xattr(int num, struct btrfs_key *di_key, struct send_ctx *sctx = ctx; ret = find_xattr(sctx->send_root, sctx->left_path, sctx->cmp_key, - name, name_len, NULL, NULL); + fname, NULL, NULL); if (ret == -ENOENT) - ret = __process_deleted_xattr(num, di_key, name, name_len, data, + ret = __process_deleted_xattr(num, di_key, fname, data, data_len, ctx); else if (ret >= 0) ret = 0; @@ -5488,13 +5517,16 @@ static int send_capabilities(struct send_ctx *sctx) char *buf = NULL; int buf_len; int ret = 0; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT(XATTR_NAME_CAPS, strlen(XATTR_NAME_CAPS)) + }; path = alloc_path_for_send(); if (!path) return -ENOMEM; di = btrfs_lookup_xattr(NULL, sctx->send_root, path, sctx->cur_ino, - XATTR_NAME_CAPS, strlen(XATTR_NAME_CAPS), 0); + &fname, 0); if (!di) { /* There is no xattr for this inode */ goto out; @@ -5520,8 +5552,7 @@ static int send_capabilities(struct send_ctx *sctx) data_ptr = (unsigned long)(di + 1) + btrfs_dir_name_len(leaf, di); read_extent_buffer(leaf, buf, data_ptr, buf_len); - ret = send_set_xattr(sctx, fspath, XATTR_NAME_CAPS, - strlen(XATTR_NAME_CAPS), buf, buf_len); + ret = send_set_xattr(sctx, fspath, &fname, buf, buf_len); out: kfree(buf); fs_path_free(fspath); diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 4c7089b1681b..55af04fae075 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1390,6 +1390,9 @@ static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objec struct btrfs_path *path; struct btrfs_key location; u64 dir_id; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT("default", 7), + }; path = btrfs_alloc_path(); if (!path) @@ -1401,7 +1404,7 @@ static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objec * to mount. */ dir_id = btrfs_super_root_dir(fs_info->super_copy); - di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0); + di = btrfs_lookup_dir_item(NULL, root, path, dir_id, &fname, 0); if (IS_ERR(di)) { btrfs_free_path(path); return PTR_ERR(di); diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 6e3b2cb6a04a..3d1459dccc8d 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1637,8 +1637,9 @@ static int qgroup_account_snapshot(struct btrfs_trans_handle *trans, * happens, we should return the error number. If the error which just affect * the creation of the pending snapshots, just return 0. */ -static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, - struct btrfs_pending_snapshot *pending) +static noinline int +create_pending_snapshot(struct btrfs_trans_handle *trans, + struct btrfs_pending_snapshot *pending) { struct btrfs_fs_info *fs_info = trans->fs_info; @@ -1648,10 +1649,9 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root *root = pending->root; struct btrfs_root *parent_root; struct btrfs_block_rsv *rsv; - struct inode *parent_inode; + struct inode *parent_inode = pending->dir; struct btrfs_path *path; struct btrfs_dir_item *dir_item; - struct dentry *dentry; struct extent_buffer *tmp; struct extent_buffer *old; struct timespec64 cur_time; @@ -1660,6 +1660,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, u64 index = 0; u64 objectid; u64 root_flags; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) pending->dentry->d_name.name, + pending->dentry->d_name.len) + }; ASSERT(pending->path); path = pending->path; @@ -1698,7 +1702,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, trace_btrfs_space_reservation(fs_info, "transaction", trans->transid, trans->bytes_reserved, 1); - dentry = pending->dentry; parent_inode = pending->dir; parent_root = BTRFS_I(parent_inode)->root; ret = record_root_in_trans(trans, parent_root, 0); @@ -1715,8 +1718,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, /* check if there is a file/dir which has the same name. */ dir_item = btrfs_lookup_dir_item(NULL, parent_root, path, btrfs_ino(BTRFS_I(parent_inode)), - dentry->d_name.name, - dentry->d_name.len, 0); + &fname, 0); if (dir_item != NULL && !IS_ERR(dir_item)) { pending->error = -EEXIST; goto dir_item_existed; @@ -1811,7 +1813,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, ret = btrfs_add_root_ref(trans, objectid, parent_root->root_key.objectid, btrfs_ino(BTRFS_I(parent_inode)), index, - dentry->d_name.name, dentry->d_name.len); + &fname); if (ret) { btrfs_abort_transaction(trans, ret); goto fail; @@ -1843,8 +1845,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, if (ret < 0) goto fail; - ret = btrfs_insert_dir_item(trans, dentry->d_name.name, - dentry->d_name.len, BTRFS_I(parent_inode), + ret = btrfs_insert_dir_item(trans, &fname, BTRFS_I(parent_inode), &key, BTRFS_FT_DIR, index); /* We have check then name at the beginning, so it is impossible. */ BUG_ON(ret == -EEXIST || ret == -EOVERFLOW); @@ -1853,8 +1854,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, goto fail; } - btrfs_i_size_write(BTRFS_I(parent_inode), parent_inode->i_size + - dentry->d_name.len * 2); + btrfs_i_size_write(BTRFS_I(parent_inode), + parent_inode->i_size + fname_len(&fname) * 2); parent_inode->i_mtime = current_time(parent_inode); parent_inode->i_ctime = parent_inode->i_mtime; ret = btrfs_update_inode_fallback(trans, parent_root, BTRFS_I(parent_inode)); diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index 77c53a7491cf..2c6d48af1d2a 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -595,10 +595,14 @@ static int check_dir_item(struct extent_buffer *leaf, if (key->type == BTRFS_DIR_ITEM_KEY || key->type == BTRFS_XATTR_ITEM_KEY) { char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)]; + struct fscrypt_name fname; read_extent_buffer(leaf, namebuf, (unsigned long)(di + 1), name_len); - name_hash = btrfs_name_hash(namebuf, name_len); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(namebuf, name_len) + }; + name_hash = btrfs_name_hash(&fname); if (unlikely(key->offset != name_hash)) { dir_item_err(leaf, slot, "name hash mismatch with key, have 0x%016x expect 0x%016llx", diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index c727ffea547c..0cd515e02fe4 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -901,12 +901,11 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, static int unlink_inode_for_log_replay(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, - int name_len) + const struct fscrypt_name *fname) { int ret; - ret = btrfs_unlink_inode(trans, dir, inode, name, name_len); + ret = btrfs_unlink_inode(trans, dir, inode, fname); if (ret) return ret; /* @@ -938,6 +937,7 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, struct extent_buffer *leaf; struct btrfs_key location; int ret; + struct fscrypt_name fname; leaf = path->nodes[0]; @@ -950,6 +950,10 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, read_extent_buffer(leaf, name, (unsigned long)(di + 1), name_len); btrfs_release_path(path); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, name_len) + }; + inode = read_one_inode(root, location.objectid); if (!inode) { ret = -EIO; @@ -960,8 +964,7 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, if (ret) goto out; - ret = unlink_inode_for_log_replay(trans, dir, BTRFS_I(inode), name, - name_len); + ret = unlink_inode_for_log_replay(trans, dir, BTRFS_I(inode), &fname); out: kfree(name); iput(inode); @@ -978,14 +981,14 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, static noinline int inode_in_dir(struct btrfs_root *root, struct btrfs_path *path, u64 dirid, u64 objectid, u64 index, - const char *name, int name_len) + const struct fscrypt_name *fname) { struct btrfs_dir_item *di; struct btrfs_key location; int ret = 0; di = btrfs_lookup_dir_index_item(NULL, root, path, dirid, - index, name, name_len, 0); + index, fname, 0); if (IS_ERR(di)) { ret = PTR_ERR(di); goto out; @@ -998,7 +1001,7 @@ static noinline int inode_in_dir(struct btrfs_root *root, } btrfs_release_path(path); - di = btrfs_lookup_dir_item(NULL, root, path, dirid, name, name_len, 0); + di = btrfs_lookup_dir_item(NULL, root, path, dirid, fname, 0); if (IS_ERR(di)) { ret = PTR_ERR(di); goto out; @@ -1025,7 +1028,7 @@ static noinline int inode_in_dir(struct btrfs_root *root, static noinline int backref_in_log(struct btrfs_root *log, struct btrfs_key *key, u64 ref_objectid, - const char *name, int namelen) + struct fscrypt_name *fname) { struct btrfs_path *path; int ret; @@ -1046,11 +1049,11 @@ static noinline int backref_in_log(struct btrfs_root *log, ret = !!btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], ref_objectid, - name, namelen); + fname); else ret = !!btrfs_find_name_in_backref(path->nodes[0], path->slots[0], - name, namelen); + fname); out: btrfs_free_path(path); return ret; @@ -1063,7 +1066,8 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, u64 inode_objectid, u64 parent_objectid, - u64 ref_index, char *name, int namelen) + u64 ref_index, + struct fscrypt_name *fname) { int ret; char *victim_name; @@ -1099,6 +1103,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); ptr_end = ptr + btrfs_item_size(leaf, path->slots[0]); while (ptr < ptr_end) { + struct fscrypt_name victim_fname; victim_ref = (struct btrfs_inode_ref *)ptr; victim_name_len = btrfs_inode_ref_name_len(leaf, victim_ref); @@ -1109,10 +1114,12 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, read_extent_buffer(leaf, victim_name, (unsigned long)(victim_ref + 1), victim_name_len); + victim_fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(victim_name, victim_name_len) + }; ret = backref_in_log(log_root, &search_key, - parent_objectid, victim_name, - victim_name_len); + parent_objectid, &victim_fname); if (ret < 0) { kfree(victim_name); return ret; @@ -1120,8 +1127,8 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, inc_nlink(&inode->vfs_inode); btrfs_release_path(path); - ret = unlink_inode_for_log_replay(trans, dir, inode, - victim_name, victim_name_len); + ret = unlink_inode_for_log_replay(trans, + dir, inode, &victim_fname); kfree(victim_name); if (ret) return ret; @@ -1135,7 +1142,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, btrfs_release_path(path); /* Same search but for extended refs */ - extref = btrfs_lookup_inode_extref(NULL, root, path, name, namelen, + extref = btrfs_lookup_inode_extref(NULL, root, path, fname, inode_objectid, parent_objectid, 0, 0); if (IS_ERR(extref)) { @@ -1152,6 +1159,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, base = btrfs_item_ptr_offset(leaf, path->slots[0]); while (cur_offset < item_size) { + struct fscrypt_name victim_fname; extref = (struct btrfs_inode_extref *)(base + cur_offset); victim_name_len = btrfs_inode_extref_name_len(leaf, extref); @@ -1165,14 +1173,15 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, read_extent_buffer(leaf, victim_name, (unsigned long)&extref->name, victim_name_len); + victim_fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(victim_name, victim_name_len), + }; + search_key.objectid = inode_objectid; search_key.type = BTRFS_INODE_EXTREF_KEY; - search_key.offset = btrfs_extref_hash(parent_objectid, - victim_name, - victim_name_len); + search_key.offset = btrfs_extref_hash(parent_objectid, &victim_fname); ret = backref_in_log(log_root, &search_key, - parent_objectid, victim_name, - victim_name_len); + parent_objectid, &victim_fname); if (ret < 0) { kfree(victim_name); return ret; @@ -1186,9 +1195,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, ret = unlink_inode_for_log_replay(trans, BTRFS_I(victim_parent), - inode, - victim_name, - victim_name_len); + inode, &victim_fname); } iput(victim_parent); kfree(victim_name); @@ -1205,7 +1212,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, /* look for a conflicting sequence number */ di = btrfs_lookup_dir_index_item(trans, root, path, btrfs_ino(dir), - ref_index, name, namelen, 0); + ref_index, fname, 0); if (IS_ERR(di)) { return PTR_ERR(di); } else if (di) { @@ -1217,7 +1224,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, /* look for a conflicting name */ di = btrfs_lookup_dir_item(trans, root, path, btrfs_ino(dir), - name, namelen, 0); + fname, 0); if (IS_ERR(di)) { return PTR_ERR(di); } else if (di) { @@ -1231,20 +1238,24 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, } static int extref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, - u32 *namelen, char **name, u64 *index, + struct fscrypt_name *fname, u64 *index, u64 *parent_objectid) { struct btrfs_inode_extref *extref; - + u32 namelen; + char *name; extref = (struct btrfs_inode_extref *)ref_ptr; - *namelen = btrfs_inode_extref_name_len(eb, extref); - *name = kmalloc(*namelen, GFP_NOFS); - if (*name == NULL) + namelen = btrfs_inode_extref_name_len(eb, extref); + name = kmalloc(namelen, GFP_NOFS); + if (name == NULL) return -ENOMEM; - read_extent_buffer(eb, *name, (unsigned long)&extref->name, - *namelen); + read_extent_buffer(eb, name, (unsigned long)&extref->name, + namelen); + *fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, namelen) + }; if (index) *index = btrfs_inode_extref_index(eb, extref); @@ -1255,18 +1266,22 @@ static int extref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, } static int ref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, - u32 *namelen, char **name, u64 *index) + struct fscrypt_name *fname, u64 *index) { struct btrfs_inode_ref *ref; - + u32 namelen; + char *name; ref = (struct btrfs_inode_ref *)ref_ptr; - *namelen = btrfs_inode_ref_name_len(eb, ref); - *name = kmalloc(*namelen, GFP_NOFS); - if (*name == NULL) + namelen = btrfs_inode_ref_name_len(eb, ref); + name = kmalloc(namelen, GFP_NOFS); + if (name == NULL) return -ENOMEM; - read_extent_buffer(eb, *name, (unsigned long)(ref + 1), *namelen); + read_extent_buffer(eb, name, (unsigned long)(ref + 1), namelen); + *fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, namelen) + }; if (index) *index = btrfs_inode_ref_index(eb, ref); @@ -1308,16 +1323,15 @@ static int unlink_old_inode_refs(struct btrfs_trans_handle *trans, ref_ptr = btrfs_item_ptr_offset(eb, path->slots[0]); ref_end = ref_ptr + btrfs_item_size(eb, path->slots[0]); while (ref_ptr < ref_end) { - char *name = NULL; - int namelen; u64 parent_id; + struct fscrypt_name fname; if (key->type == BTRFS_INODE_EXTREF_KEY) { - ret = extref_get_fields(eb, ref_ptr, &namelen, &name, + ret = extref_get_fields(eb, ref_ptr, &fname, NULL, &parent_id); } else { parent_id = key->offset; - ret = ref_get_fields(eb, ref_ptr, &namelen, &name, + ret = ref_get_fields(eb, ref_ptr, &fname, NULL); } if (ret) @@ -1325,11 +1339,11 @@ static int unlink_old_inode_refs(struct btrfs_trans_handle *trans, if (key->type == BTRFS_INODE_EXTREF_KEY) ret = !!btrfs_find_name_in_ext_backref(log_eb, log_slot, - parent_id, name, - namelen); + parent_id, + &fname); else ret = !!btrfs_find_name_in_backref(log_eb, log_slot, - name, namelen); + &fname); if (!ret) { struct inode *dir; @@ -1338,20 +1352,20 @@ static int unlink_old_inode_refs(struct btrfs_trans_handle *trans, dir = read_one_inode(root, parent_id); if (!dir) { ret = -ENOENT; - kfree(name); + kfree(fname_name(&fname)); goto out; } ret = unlink_inode_for_log_replay(trans, BTRFS_I(dir), - inode, name, namelen); - kfree(name); + inode, &fname); + kfree(fname_name(&fname)); iput(dir); if (ret) goto out; goto again; } - kfree(name); - ref_ptr += namelen; + kfree(fname_name(&fname)); + ref_ptr += fname_len(&fname); if (key->type == BTRFS_INODE_EXTREF_KEY) ref_ptr += sizeof(struct btrfs_inode_extref); else @@ -1380,8 +1394,6 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, struct inode *inode = NULL; unsigned long ref_ptr; unsigned long ref_end; - char *name = NULL; - int namelen; int ret; int log_ref_ver = 0; u64 parent_objectid; @@ -1424,8 +1436,9 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, } while (ref_ptr < ref_end) { + struct fscrypt_name fname; if (log_ref_ver) { - ret = extref_get_fields(eb, ref_ptr, &namelen, &name, + ret = extref_get_fields(eb, ref_ptr, &fname, &ref_index, &parent_objectid); /* * parent object can change from one array @@ -1438,7 +1451,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, goto out; } } else { - ret = ref_get_fields(eb, ref_ptr, &namelen, &name, + ret = ref_get_fields(eb, ref_ptr, &fname, &ref_index); } if (ret) @@ -1446,7 +1459,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, ret = inode_in_dir(root, path, btrfs_ino(BTRFS_I(dir)), btrfs_ino(BTRFS_I(inode)), ref_index, - name, namelen); + &fname); if (ret < 0) { goto out; } else if (ret == 0) { @@ -1460,7 +1473,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, ret = __add_inode_ref(trans, root, path, log, BTRFS_I(dir), BTRFS_I(inode), inode_objectid, parent_objectid, - ref_index, name, namelen); + ref_index, &fname); if (ret) { if (ret == 1) ret = 0; @@ -1469,7 +1482,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, /* insert our name */ ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), - name, namelen, 0, ref_index); + &fname, 0, ref_index); if (ret) goto out; @@ -1479,9 +1492,8 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, } /* Else, ret == 1, we already have a perfect match, we're done. */ - ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + namelen; - kfree(name); - name = NULL; + ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + fname_len(&fname); + kfree(fname_name(&fname)); if (log_ref_ver) { iput(dir); dir = NULL; @@ -1505,7 +1517,6 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, ret = overwrite_item(trans, root, path, eb, slot, key); out: btrfs_release_path(path); - kfree(name); iput(dir); iput(inode); return ret; @@ -1777,7 +1788,7 @@ static noinline int link_to_fixup_dir(struct btrfs_trans_handle *trans, static noinline int insert_one_name(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 dirid, u64 index, - char *name, int name_len, + struct fscrypt_name *fname, struct btrfs_key *location) { struct inode *inode; @@ -1794,8 +1805,8 @@ static noinline int insert_one_name(struct btrfs_trans_handle *trans, return -EIO; } - ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), name, - name_len, 1, index); + ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), fname, 1, + index); /* FIXME, put inode into FIXUP list */ @@ -1869,6 +1880,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, int ret; bool update_size = true; bool name_added = false; + struct fscrypt_name fname; dir = read_one_inode(root, key->objectid); if (!dir) @@ -1884,6 +1896,9 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, log_flags = btrfs_dir_flags(eb, di); read_extent_buffer(eb, name, (unsigned long)(di + 1), name_len); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, name_len) + }; btrfs_dir_item_key_to_cpu(eb, di, &log_key); ret = btrfs_lookup_inode(trans, root, path, &log_key, 0); @@ -1894,7 +1909,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, ret = 0; dir_dst_di = btrfs_lookup_dir_item(trans, root, path, key->objectid, - name, name_len, 1); + &fname, 1); if (IS_ERR(dir_dst_di)) { ret = PTR_ERR(dir_dst_di); goto out; @@ -1911,7 +1926,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, index_dst_di = btrfs_lookup_dir_index_item(trans, root, path, key->objectid, key->offset, - name, name_len, 1); + &fname, 1); if (IS_ERR(index_dst_di)) { ret = PTR_ERR(index_dst_di); goto out; @@ -1939,7 +1954,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, search_key.objectid = log_key.objectid; search_key.type = BTRFS_INODE_REF_KEY; search_key.offset = key->objectid; - ret = backref_in_log(root->log_root, &search_key, 0, name, name_len); + ret = backref_in_log(root->log_root, &search_key, 0, &fname); if (ret < 0) { goto out; } else if (ret) { @@ -1952,8 +1967,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, search_key.objectid = log_key.objectid; search_key.type = BTRFS_INODE_EXTREF_KEY; search_key.offset = key->objectid; - ret = backref_in_log(root->log_root, &search_key, key->objectid, name, - name_len); + ret = backref_in_log(root->log_root, &search_key, key->objectid, &fname); if (ret < 0) { goto out; } else if (ret) { @@ -1964,7 +1978,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, } btrfs_release_path(path); ret = insert_one_name(trans, root, key->objectid, key->offset, - name, name_len, &log_key); + &fname, &log_key); if (ret && ret != -ENOENT && ret != -EEXIST) goto out; if (!ret) @@ -2147,6 +2161,7 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, char *name; struct inode *inode = NULL; struct btrfs_key location; + struct fscrypt_name fname; /* * Currently we only log dir index keys. Even if we replay a log created @@ -2167,6 +2182,9 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, } read_extent_buffer(eb, name, (unsigned long)(di + 1), name_len); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, name_len) + }; if (log) { struct btrfs_dir_item *log_di; @@ -2174,7 +2192,7 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, log_di = btrfs_lookup_dir_index_item(trans, log, log_path, dir_key->objectid, dir_key->offset, - name, name_len, 0); + &fname, 0); if (IS_ERR(log_di)) { ret = PTR_ERR(log_di); goto out; @@ -2199,8 +2217,8 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, goto out; inc_nlink(inode); - ret = unlink_inode_for_log_replay(trans, BTRFS_I(dir), BTRFS_I(inode), - name, name_len); + ret = unlink_inode_for_log_replay(trans, BTRFS_I(dir), + BTRFS_I(inode), &fname); /* * Unlike dir item keys, dir index keys can only have one name (entry) in * them, as there are no key collisions since each key has a unique offset @@ -2260,6 +2278,7 @@ static int replay_xattr_deletes(struct btrfs_trans_handle *trans, u16 data_len = btrfs_dir_data_len(path->nodes[0], di); u32 this_len = sizeof(*di) + name_len + data_len; char *name; + struct fscrypt_name fname; name = kmalloc(name_len, GFP_NOFS); if (!name) { @@ -2268,15 +2287,18 @@ static int replay_xattr_deletes(struct btrfs_trans_handle *trans, } read_extent_buffer(path->nodes[0], name, (unsigned long)(di + 1), name_len); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, name_len) + }; log_di = btrfs_lookup_xattr(NULL, log, log_path, ino, - name, name_len, 0); + &fname, 0); btrfs_release_path(log_path); if (!log_di) { /* Doesn't exist in log tree, so delete it. */ btrfs_release_path(path); di = btrfs_lookup_xattr(trans, root, path, ino, - name, name_len, -1); + &fname, -1); kfree(name); if (IS_ERR(di)) { ret = PTR_ERR(di); @@ -3448,7 +3470,7 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans, struct btrfs_root *log, struct btrfs_path *path, u64 dir_ino, - const char *name, int name_len, + const struct fscrypt_name *fname, u64 index) { struct btrfs_dir_item *di; @@ -3458,7 +3480,7 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans, * for dir item keys. */ di = btrfs_lookup_dir_index_item(trans, log, path, dir_ino, - index, name, name_len, -1); + index, fname, -1); if (IS_ERR(di)) return PTR_ERR(di); else if (!di) @@ -3495,7 +3517,7 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans, */ void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, struct btrfs_inode *dir, u64 index) { struct btrfs_path *path; @@ -3522,7 +3544,7 @@ void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, } ret = del_logged_dentry(trans, root->log_root, path, btrfs_ino(dir), - name, name_len, index); + fname, index); btrfs_free_path(path); out_unlock: mutex_unlock(&dir->log_mutex); @@ -3534,7 +3556,7 @@ void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, /* see comments for btrfs_del_dir_entries_in_log */ void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *fname, struct btrfs_inode *inode, u64 dirid) { struct btrfs_root *log; @@ -3555,7 +3577,7 @@ void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, log = root->log_root; mutex_lock(&inode->log_mutex); - ret = btrfs_del_inode_ref(trans, log, name, name_len, btrfs_ino(inode), + ret = btrfs_del_inode_ref(trans, log, fname, btrfs_ino(inode), dirid, &index); mutex_unlock(&inode->log_mutex); if (ret < 0 && ret != -ENOENT) @@ -5189,6 +5211,7 @@ static int btrfs_check_ref_name_override(struct extent_buffer *eb, u32 this_len; unsigned long name_ptr; struct btrfs_dir_item *di; + struct fscrypt_name fname; if (key->type == BTRFS_INODE_REF_KEY) { struct btrfs_inode_ref *iref; @@ -5222,8 +5245,12 @@ static int btrfs_check_ref_name_override(struct extent_buffer *eb, } read_extent_buffer(eb, name, name_ptr, this_name_len); + fname = (struct fscrypt_name) { + .disk_name = FSTR_INIT(name, this_name_len) + }; + di = btrfs_lookup_dir_item(NULL, inode->root, search_path, - parent, name, this_name_len, 0); + parent, &fname, 0); if (di && !IS_ERR(di)) { struct btrfs_key di_key; @@ -6879,6 +6906,10 @@ void btrfs_log_new_name(struct btrfs_trans_handle *trans, if (old_dir && old_dir->logged_trans == trans->transid) { struct btrfs_root *log = old_dir->root->log_root; struct btrfs_path *path; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) old_dentry->d_name.name, + old_dentry->d_name.len) + }; ASSERT(old_dir_index >= BTRFS_DIR_START_INDEX); @@ -6916,8 +6947,7 @@ void btrfs_log_new_name(struct btrfs_trans_handle *trans, */ mutex_lock(&old_dir->log_mutex); ret = del_logged_dentry(trans, log, path, btrfs_ino(old_dir), - old_dentry->d_name.name, - old_dentry->d_name.len, old_dir_index); + &fname, old_dir_index); if (ret > 0) { /* * The dentry does not exist in the log, so record its diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h index 57ab5f3b8dc7..76ec8d353a05 100644 --- a/fs/btrfs/tree-log.h +++ b/fs/btrfs/tree-log.h @@ -78,11 +78,11 @@ int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, struct btrfs_log_ctx *ctx); void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *name, struct btrfs_inode *dir, u64 index); void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct fscrypt_name *name, struct btrfs_inode *inode, u64 dirid); void btrfs_end_log_trans(struct btrfs_root *root); void btrfs_pin_log_trans(struct btrfs_root *root); diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c index 7421abcf325a..d2d484aaaca9 100644 --- a/fs/btrfs/xattr.c +++ b/fs/btrfs/xattr.c @@ -21,7 +21,7 @@ #include "locking.h" int btrfs_getxattr(struct inode *inode, const char *name, - void *buffer, size_t size) + void *buffer, size_t size) { struct btrfs_dir_item *di; struct btrfs_root *root = BTRFS_I(inode)->root; @@ -29,6 +29,9 @@ int btrfs_getxattr(struct inode *inode, const char *name, struct extent_buffer *leaf; int ret = 0; unsigned long data_ptr; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) name, strlen(name)) + }; path = btrfs_alloc_path(); if (!path) @@ -36,7 +39,7 @@ int btrfs_getxattr(struct inode *inode, const char *name, /* lookup the xattr by name */ di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(BTRFS_I(inode)), - name, strlen(name), 0); + &fname, 0); if (!di) { ret = -ENODATA; goto out; @@ -85,6 +88,10 @@ int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode, struct btrfs_path *path; size_t name_len = strlen(name); int ret = 0; + struct fscrypt_name fname = { + .disk_name = FSTR_INIT((char *) name, name_len) + }; + ASSERT(trans); @@ -98,7 +105,7 @@ int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode, if (!value) { di = btrfs_lookup_xattr(trans, root, path, - btrfs_ino(BTRFS_I(inode)), name, name_len, -1); + btrfs_ino(BTRFS_I(inode)), &fname, -1); if (!di && (flags & XATTR_REPLACE)) ret = -ENODATA; else if (IS_ERR(di)) @@ -118,7 +125,7 @@ int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode, if (flags & XATTR_REPLACE) { ASSERT(inode_is_locked(inode)); di = btrfs_lookup_xattr(NULL, root, path, - btrfs_ino(BTRFS_I(inode)), name, name_len, 0); + btrfs_ino(BTRFS_I(inode)), &fname, 0); if (!di) ret = -ENODATA; else if (IS_ERR(di)) @@ -130,7 +137,7 @@ int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode, } ret = btrfs_insert_xattr_item(trans, root, path, btrfs_ino(BTRFS_I(inode)), - name, name_len, value, size); + &fname, value, size); if (ret == -EOVERFLOW) { /* * We have an existing item in a leaf, split_leaf couldn't @@ -139,14 +146,14 @@ int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode, */ ret = 0; btrfs_assert_tree_write_locked(path->nodes[0]); - di = btrfs_match_dir_item_name(fs_info, path, name, name_len); + di = btrfs_match_dir_item_name(fs_info, path, &fname); if (!di && !(flags & XATTR_REPLACE)) { ret = -ENOSPC; goto out; } } else if (ret == -EEXIST) { ret = 0; - di = btrfs_match_dir_item_name(fs_info, path, name, name_len); + di = btrfs_match_dir_item_name(fs_info, path, &fname); ASSERT(di); /* logic error */ } else if (ret) { goto out;

[07/21] btrfs: use fscrypt_name's instead of name/len everywhere.

Commit Message

Patch