diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-15 13:37:08 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-15 13:37:08 -0800 |
commit | 39d2c3b96e072c8756f3b980588fa516b7988cb1 (patch) | |
tree | 6d1676323744646b30bbbe102bfc8e9fd1d5461c | |
parent | e18bf801f1501e15830db5fa927a6e2832d49d7b (diff) | |
parent | ba75d570b60c05cda21c0b43c5fbdc4e344f892d (diff) | |
download | linux-39d2c3b96e072c8756f3b980588fa516b7988cb1.tar.bz2 |
Merge tag 'upstream-4.10-rc1' of git://git.infradead.org/linux-ubifs
Pull ubifs updates from Richard Weinberger:
- file encryption for UBIFS using the fscrypt framework
- a fix to honor the dirty_writeback_interval sysctl
- removal of dead code
* tag 'upstream-4.10-rc1' of git://git.infradead.org/linux-ubifs: (30 commits)
ubifs: Initialize fstr_real_len
ubifs: Use fscrypt ioctl() helpers
ubifs: Use FS_CFLG_OWN_PAGES
ubifs: Raise write version to 5
ubifs: Implement UBIFS_FLG_ENCRYPTION
ubifs: Implement UBIFS_FLG_DOUBLE_HASH
ubifs: Use a random number for cookies
ubifs: Add full hash lookup support
ubifs: Rename tnc_read_node_nm
ubifs: Add support for encrypted symlinks
ubifs: Implement encrypted filenames
ubifs: Make r5 hash binary string aware
ubifs: Relax checks in ubifs_validate_entry()
ubifs: Implement encrypt/decrypt for all IO
ubifs: Constify struct inode pointer in ubifs_crypt_is_encrypted()
ubifs: Introduce new data node field, compr_size
ubifs: Enforce crypto policy in mmap
ubifs: Massage assert in ubifs_xattr_set() wrt. fscrypto
ubifs: Preload crypto context in ->lookup()
ubifs: Enforce crypto policy in ->link and ->rename
...
-rw-r--r-- | fs/ubifs/Kconfig | 11 | ||||
-rw-r--r-- | fs/ubifs/Makefile | 1 | ||||
-rw-r--r-- | fs/ubifs/crypto.c | 97 | ||||
-rw-r--r-- | fs/ubifs/debug.c | 14 | ||||
-rw-r--r-- | fs/ubifs/dir.c | 478 | ||||
-rw-r--r-- | fs/ubifs/file.c | 108 | ||||
-rw-r--r-- | fs/ubifs/gc.c | 4 | ||||
-rw-r--r-- | fs/ubifs/io.c | 18 | ||||
-rw-r--r-- | fs/ubifs/ioctl.c | 20 | ||||
-rw-r--r-- | fs/ubifs/journal.c | 224 | ||||
-rw-r--r-- | fs/ubifs/key.h | 21 | ||||
-rw-r--r-- | fs/ubifs/replay.c | 10 | ||||
-rw-r--r-- | fs/ubifs/sb.c | 59 | ||||
-rw-r--r-- | fs/ubifs/super.c | 17 | ||||
-rw-r--r-- | fs/ubifs/tnc.c | 159 | ||||
-rw-r--r-- | fs/ubifs/ubifs-media.h | 29 | ||||
-rw-r--r-- | fs/ubifs/ubifs.h | 115 | ||||
-rw-r--r-- | fs/ubifs/xattr.c | 116 |
18 files changed, 1192 insertions, 309 deletions
diff --git a/fs/ubifs/Kconfig b/fs/ubifs/Kconfig index 7ff7712f284e..0a908ae7af13 100644 --- a/fs/ubifs/Kconfig +++ b/fs/ubifs/Kconfig @@ -50,3 +50,14 @@ config UBIFS_ATIME_SUPPORT strictatime is the "heavy", relatime is "lighter", etc. If unsure, say 'N' + +config UBIFS_FS_ENCRYPTION + bool "UBIFS Encryption" + depends on UBIFS_FS + select FS_ENCRYPTION + default n + help + Enable encryption of UBIFS files and directories. This + feature is similar to ecryptfs, but it is more memory + efficient since it avoids caching the encrypted and + decrypted pages in the page cache. diff --git a/fs/ubifs/Makefile b/fs/ubifs/Makefile index c54a24360f85..6f3251c2bf08 100644 --- a/fs/ubifs/Makefile +++ b/fs/ubifs/Makefile @@ -5,3 +5,4 @@ ubifs-y += tnc.o master.o scan.o replay.o log.o commit.o gc.o orphan.o ubifs-y += budget.o find.o tnc_commit.o compress.o lpt.o lprops.o ubifs-y += recovery.o ioctl.o lpt_commit.o tnc_misc.o xattr.o debug.o ubifs-y += misc.o +ubifs-$(CONFIG_UBIFS_FS_ENCRYPTION) += crypto.o diff --git a/fs/ubifs/crypto.c b/fs/ubifs/crypto.c new file mode 100644 index 000000000000..3402720f2b28 --- /dev/null +++ b/fs/ubifs/crypto.c @@ -0,0 +1,97 @@ +#include "ubifs.h" + +static int ubifs_crypt_get_context(struct inode *inode, void *ctx, size_t len) +{ + return ubifs_xattr_get(inode, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT, + ctx, len); +} + +static int ubifs_crypt_set_context(struct inode *inode, const void *ctx, + size_t len, void *fs_data) +{ + return ubifs_xattr_set(inode, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT, + ctx, len, 0); +} + +static bool ubifs_crypt_empty_dir(struct inode *inode) +{ + return ubifs_check_dir_empty(inode) == 0; +} + +static unsigned int ubifs_crypt_max_namelen(struct inode *inode) +{ + if (S_ISLNK(inode->i_mode)) + return UBIFS_MAX_INO_DATA; + else + return UBIFS_MAX_NLEN; +} + +static int ubifs_key_prefix(struct inode *inode, u8 **key) +{ + static char prefix[] = "ubifs:"; + + *key = prefix; + + return sizeof(prefix) - 1; +} + +int ubifs_encrypt(const struct inode *inode, struct ubifs_data_node *dn, + unsigned int in_len, unsigned int *out_len, int block) +{ + struct ubifs_info *c = inode->i_sb->s_fs_info; + void *p = &dn->data; + struct page *ret; + unsigned int pad_len = round_up(in_len, UBIFS_CIPHER_BLOCK_SIZE); + + ubifs_assert(pad_len <= *out_len); + dn->compr_size = cpu_to_le16(in_len); + + /* pad to full block cipher length */ + if (pad_len != in_len) + memset(p + in_len, 0, pad_len - in_len); + + ret = fscrypt_encrypt_page(inode, virt_to_page(&dn->data), pad_len, + offset_in_page(&dn->data), block, GFP_NOFS); + if (IS_ERR(ret)) { + ubifs_err(c, "fscrypt_encrypt_page failed: %ld", PTR_ERR(ret)); + return PTR_ERR(ret); + } + *out_len = pad_len; + + return 0; +} + +int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn, + unsigned int *out_len, int block) +{ + struct ubifs_info *c = inode->i_sb->s_fs_info; + int err; + unsigned int clen = le16_to_cpu(dn->compr_size); + unsigned int dlen = *out_len; + + if (clen <= 0 || clen > UBIFS_BLOCK_SIZE || clen > dlen) { + ubifs_err(c, "bad compr_size: %i", clen); + return -EINVAL; + } + + ubifs_assert(dlen <= UBIFS_BLOCK_SIZE); + err = fscrypt_decrypt_page(inode, virt_to_page(&dn->data), dlen, + offset_in_page(&dn->data), block); + if (err) { + ubifs_err(c, "fscrypt_decrypt_page failed: %i", err); + return err; + } + *out_len = clen; + + return 0; +} + +struct fscrypt_operations ubifs_crypt_operations = { + .flags = FS_CFLG_OWN_PAGES, + .get_context = ubifs_crypt_get_context, + .set_context = ubifs_crypt_set_context, + .is_encrypted = __ubifs_crypt_is_encrypted, + .empty_dir = ubifs_crypt_empty_dir, + .max_namelen = ubifs_crypt_max_namelen, + .key_prefix = ubifs_key_prefix, +}; diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 69e287e20732..1e712a364680 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -233,7 +233,7 @@ static void dump_ch(const struct ubifs_ch *ch) void ubifs_dump_inode(struct ubifs_info *c, const struct inode *inode) { const struct ubifs_inode *ui = ubifs_inode(inode); - struct qstr nm = { .name = NULL }; + struct fscrypt_name nm = {0}; union ubifs_key key; struct ubifs_dent_node *dent, *pdent = NULL; int count = 2; @@ -289,8 +289,8 @@ void ubifs_dump_inode(struct ubifs_info *c, const struct inode *inode) pr_err("\t%d: %s (%s)\n", count++, dent->name, get_dent_type(dent->type)); - nm.name = dent->name; - nm.len = le16_to_cpu(dent->nlen); + fname_name(&nm) = dent->name; + fname_len(&nm) = le16_to_cpu(dent->nlen); kfree(pdent); pdent = dent; key_read(c, &dent->key, &key); @@ -1107,7 +1107,7 @@ int dbg_check_dir(struct ubifs_info *c, const struct inode *dir) unsigned int nlink = 2; union ubifs_key key; struct ubifs_dent_node *dent, *pdent = NULL; - struct qstr nm = { .name = NULL }; + struct fscrypt_name nm = {0}; loff_t size = UBIFS_INO_NODE_SZ; if (!dbg_is_chk_gen(c)) @@ -1128,9 +1128,9 @@ int dbg_check_dir(struct ubifs_info *c, const struct inode *dir) return err; } - nm.name = dent->name; - nm.len = le16_to_cpu(dent->nlen); - size += CALC_DENT_SIZE(nm.len); + fname_name(&nm) = dent->name; + fname_len(&nm) = le16_to_cpu(dent->nlen); + size += CALC_DENT_SIZE(fname_len(&nm)); if (dent->type == UBIFS_ITYPE_DIR) nlink += 1; kfree(pdent); diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index ca16c5d7bab1..1c5331ac9614 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -85,11 +85,26 @@ static int inherit_flags(const struct inode *dir, umode_t mode) * initializes it. Returns new inode in case of success and an error code in * case of failure. */ -struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir, +struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir, umode_t mode) { + int err; struct inode *inode; struct ubifs_inode *ui; + bool encrypted = false; + + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err) { + ubifs_err(c, "fscrypt_get_encryption_info failed: %i", err); + return ERR_PTR(err); + } + + if (!fscrypt_has_encryption_key(dir)) + return ERR_PTR(-EPERM); + + encrypted = true; + } inode = new_inode(c->vfs_sb); ui = ubifs_inode(inode); @@ -165,18 +180,29 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir, */ ui->creat_sqnum = ++c->max_sqnum; spin_unlock(&c->cnt_lock); + + if (encrypted) { + err = fscrypt_inherit_context(dir, inode, &encrypted, true); + if (err) { + ubifs_err(c, "fscrypt_inherit_context failed: %i", err); + make_bad_inode(inode); + iput(inode); + return ERR_PTR(err); + } + } + return inode; } static int dbg_check_name(const struct ubifs_info *c, const struct ubifs_dent_node *dent, - const struct qstr *nm) + const struct fscrypt_name *nm) { if (!dbg_is_chk_gen(c)) return 0; - if (le16_to_cpu(dent->nlen) != nm->len) + if (le16_to_cpu(dent->nlen) != fname_len(nm)) return -EINVAL; - if (memcmp(dent->name, nm->name, nm->len)) + if (memcmp(dent->name, fname_name(nm), fname_len(nm))) return -EINVAL; return 0; } @@ -189,30 +215,61 @@ static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry, struct inode *inode = NULL; struct ubifs_dent_node *dent; struct ubifs_info *c = dir->i_sb->s_fs_info; + struct fscrypt_name nm; dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino); - if (dentry->d_name.len > UBIFS_MAX_NLEN) - return ERR_PTR(-ENAMETOOLONG); + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + + /* + * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is + * created while the directory was encrypted and we + * have access to the key. + */ + if (fscrypt_has_encryption_key(dir)) + fscrypt_set_encrypted_dentry(dentry); + fscrypt_set_d_op(dentry); + if (err && err != -ENOKEY) + return ERR_PTR(err); + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm); + if (err) + return ERR_PTR(err); + + if (fname_len(&nm) > UBIFS_MAX_NLEN) { + err = -ENAMETOOLONG; + goto out_fname; + } dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); - if (!dent) - return ERR_PTR(-ENOMEM); + if (!dent) { + err = -ENOMEM; + goto out_fname; + } - dent_key_init(c, &key, dir->i_ino, &dentry->d_name); + if (nm.hash) { + ubifs_assert(fname_len(&nm) == 0); + ubifs_assert(fname_name(&nm) == NULL); + dent_key_init_hash(c, &key, dir->i_ino, nm.hash); + err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash); + } else { + dent_key_init(c, &key, dir->i_ino, &nm); + err = ubifs_tnc_lookup_nm(c, &key, dent, &nm); + } - err = ubifs_tnc_lookup_nm(c, &key, dent, &dentry->d_name); if (err) { if (err == -ENOENT) { dbg_gen("not found"); goto done; } - goto out; + goto out_dent; } - if (dbg_check_name(c, dent, &dentry->d_name)) { + if (dbg_check_name(c, dent, &nm)) { err = -EINVAL; - goto out; + goto out_dent; } inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum)); @@ -225,11 +282,12 @@ static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry, ubifs_err(c, "dead directory entry '%pd', error %d", dentry, err); ubifs_ro_mode(c, err); - goto out; + goto out_dent; } done: kfree(dent); + fscrypt_free_filename(&nm); /* * Note, d_splice_alias() would be required instead if we supported * NFS. @@ -237,8 +295,10 @@ done: d_add(dentry, inode); return NULL; -out: +out_dent: kfree(dent); +out_fname: + fscrypt_free_filename(&nm); return ERR_PTR(err); } @@ -247,10 +307,11 @@ static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode, { struct inode *inode; struct ubifs_info *c = dir->i_sb->s_fs_info; - int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len); struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1, .dirtied_ino = 1 }; struct ubifs_inode *dir_ui = ubifs_inode(dir); + struct fscrypt_name nm; + int err, sz_change; /* * Budget request settings: new inode, new direntry, changing the @@ -264,10 +325,16 @@ static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode, if (err) return err; + err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); + if (err) + goto out_budg; + + sz_change = CALC_DENT_SIZE(fname_len(&nm)); + inode = ubifs_new_inode(c, dir, mode); if (IS_ERR(inode)) { err = PTR_ERR(inode); - goto out_budg; + goto out_fname; } err = ubifs_init_security(dir, inode, &dentry->d_name); @@ -278,12 +345,13 @@ static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode, dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0); if (err) goto out_cancel; mutex_unlock(&dir_ui->ui_mutex); ubifs_release_budget(c, &req); + fscrypt_free_filename(&nm); insert_inode_hash(inode); d_instantiate(dentry, inode); return 0; @@ -295,6 +363,8 @@ out_cancel: out_inode: make_bad_inode(inode); iput(inode); +out_fname: + fscrypt_free_filename(&nm); out_budg: ubifs_release_budget(c, &req); ubifs_err(c, "cannot create regular file, error %d", err); @@ -310,6 +380,7 @@ static int do_tmpfile(struct inode *dir, struct dentry *dentry, struct ubifs_budget_req ino_req = { .dirtied_ino = 1 }; struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir); int err, instantiated = 0; + struct fscrypt_name nm; /* * Budget request settings: new dirty inode, new direntry, @@ -319,13 +390,30 @@ static int do_tmpfile(struct inode *dir, struct dentry *dentry, dbg_gen("dent '%pd', mode %#hx in dir ino %lu", dentry, mode, dir->i_ino); - err = ubifs_budget_space(c, &req); + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err) + return err; + + if (!fscrypt_has_encryption_key(dir)) { + return -EPERM; + } + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); if (err) return err; + err = ubifs_budget_space(c, &req); + if (err) { + fscrypt_free_filename(&nm); + return err; + } + err = ubifs_budget_space(c, &ino_req); if (err) { ubifs_release_budget(c, &req); + fscrypt_free_filename(&nm); return err; } @@ -361,7 +449,7 @@ static int do_tmpfile(struct inode *dir, struct dentry *dentry, mutex_unlock(&ui->ui_mutex); mutex_lock(&dir_ui->ui_mutex); - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0); if (err) goto out_cancel; mutex_unlock(&dir_ui->ui_mutex); @@ -380,6 +468,7 @@ out_budg: ubifs_release_budget(c, &req); if (!instantiated) ubifs_release_budget(c, &ino_req); + fscrypt_free_filename(&nm); ubifs_err(c, "cannot create temporary file, error %d", err); return err; } @@ -439,12 +528,14 @@ static unsigned int vfs_dent_type(uint8_t type) */ static int ubifs_readdir(struct file *file, struct dir_context *ctx) { - int err = 0; - struct qstr nm; + int fstr_real_len = 0, err = 0; + struct fscrypt_name nm; + struct fscrypt_str fstr = {0}; union ubifs_key key; struct ubifs_dent_node *dent; struct inode *dir = file_inode(file); struct ubifs_info *c = dir->i_sb->s_fs_info; + bool encrypted = ubifs_crypt_is_encrypted(dir); dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos); @@ -455,6 +546,18 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx) */ return 0; + if (encrypted) { + err = fscrypt_get_encryption_info(dir); + if (err && err != -ENOKEY) + return err; + + err = fscrypt_fname_alloc_buffer(dir, UBIFS_MAX_NLEN, &fstr); + if (err) + return err; + + fstr_real_len = fstr.len; + } + if (file->f_version == 0) { /* * The file was seek'ed, which means that @file->private_data @@ -476,12 +579,15 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx) /* File positions 0 and 1 correspond to "." and ".." */ if (ctx->pos < 2) { ubifs_assert(!file->private_data); - if (!dir_emit_dots(file, ctx)) + if (!dir_emit_dots(file, ctx)) { + if (encrypted) + fscrypt_fname_free_buffer(&fstr); return 0; + } /* Find the first entry in TNC and save it */ lowest_dent_key(c, &key, dir->i_ino); - nm.name = NULL; + fname_len(&nm) = 0; dent = ubifs_tnc_next_ent(c, &key, &nm); if (IS_ERR(dent)) { err = PTR_ERR(dent); @@ -499,7 +605,7 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx) * Find the entry corresponding to @ctx->pos or the closest one. */ dent_key_init_hash(c, &key, dir->i_ino, ctx->pos); - nm.name = NULL; + fname_len(&nm) = 0; dent = ubifs_tnc_next_ent(c, &key, &nm); if (IS_ERR(dent)) { err = PTR_ERR(dent); @@ -516,15 +622,33 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx) ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum); - nm.len = le16_to_cpu(dent->nlen); - if (!dir_emit(ctx, dent->name, nm.len, + fname_len(&nm) = le16_to_cpu(dent->nlen); + fname_name(&nm) = dent->name; + + if (encrypted) { + fstr.len = fstr_real_len; + + err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c, + &dent->key), + le32_to_cpu(dent->cookie), + &nm.disk_name, &fstr); + if (err) + goto out; + } else { + fstr.len = fname_len(&nm); + fstr.name = fname_name(&nm); + } + + if (!dir_emit(ctx, fstr.name, fstr.len, le64_to_cpu(dent->inum), - vfs_dent_type(dent->type))) + vfs_dent_type(dent->type))) { + if (encrypted) + fscrypt_fname_free_buffer(&fstr); return 0; + } /* Switch to the next entry */ key_read(c, &dent->key, &key); - nm.name = dent->name; dent = ubifs_tnc_next_ent(c, &key, &nm); if (IS_ERR(dent)) { err = PTR_ERR(dent); @@ -541,6 +665,9 @@ out: kfree(file->private_data); file->private_data = NULL; + if (encrypted) + fscrypt_fname_free_buffer(&fstr); + if (err != -ENOENT) ubifs_err(c, "cannot find next direntry, error %d", err); else @@ -601,6 +728,7 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir, int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len); struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2, .dirtied_ino_d = ALIGN(ui->data_len, 8) }; + struct fscrypt_name nm; /* * Budget request settings: new direntry, changing the target inode, @@ -613,13 +741,29 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir, ubifs_assert(inode_is_locked(dir)); ubifs_assert(inode_is_locked(inode)); - err = dbg_check_synced_i_size(c, inode); + if (ubifs_crypt_is_encrypted(dir)) { + if (!fscrypt_has_permitted_context(dir, inode)) + return -EPERM; + + err = fscrypt_get_encryption_info(inode); + if (err) + return err; + + if (!fscrypt_has_encryption_key(inode)) + return -EPERM; + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); if (err) return err; + err = dbg_check_synced_i_size(c, inode); + if (err) + goto out_fname; + err = ubifs_budget_space(c, &req); if (err) - return err; + goto out_fname; lock_2_inodes(dir, inode); inc_nlink(inode); @@ -628,13 +772,14 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir, dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0); if (err) goto out_cancel; unlock_2_inodes(dir, inode); ubifs_release_budget(c, &req); d_instantiate(dentry, inode); + fscrypt_free_filename(&nm); return 0; out_cancel: @@ -644,6 +789,8 @@ out_cancel: unlock_2_inodes(dir, inode); ubifs_release_budget(c, &req); iput(inode); +out_fname: + fscrypt_free_filename(&nm); return err; } @@ -652,10 +799,10 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry) struct ubifs_info *c = dir->i_sb->s_fs_info; struct inode *inode = d_inode(dentry); struct ubifs_inode *dir_ui = ubifs_inode(dir); - int sz_change = CALC_DENT_SIZE(dentry->d_name.len); - int err, budgeted = 1; + int err, sz_change, budgeted = 1; struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 }; unsigned int saved_nlink = inode->i_nlink; + struct fscrypt_name nm; /* * Budget request settings: deletion direntry, deletion inode (+1 for @@ -667,16 +814,29 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry) dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu", dentry, inode->i_ino, inode->i_nlink, dir->i_ino); + + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err && err != -ENOKEY) + return err; + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm); + if (err) + return err; + + sz_change = CALC_DENT_SIZE(fname_len(&nm)); + ubifs_assert(inode_is_locked(dir)); ubifs_assert(inode_is_locked(inode)); err = dbg_check_synced_i_size(c, inode); if (err) - return err; + goto out_fname; err = ubifs_budget_space(c, &req); if (err) { if (err != -ENOSPC) - return err; + goto out_fname; budgeted = 0; } @@ -686,7 +846,7 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry) dir->i_size -= sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0); if (err) goto out_cancel; unlock_2_inodes(dir, inode); @@ -698,6 +858,7 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry) c->bi.nospace = c->bi.nospace_rp = 0; smp_wmb(); } + fscrypt_free_filename(&nm); return 0; out_cancel: @@ -707,21 +868,23 @@ out_cancel: unlock_2_inodes(dir, inode); if (budgeted) ubifs_release_budget(c, &req); +out_fname: + fscrypt_free_filename(&nm); return err; } /** * check_dir_empty - check if a directory is empty or not. - * @c: UBIFS file-system description object * @dir: VFS inode object of the directory to check * * This function checks if directory @dir is empty. Returns zero if the * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes * in case of of errors. */ -static int check_dir_empty(struct ubifs_info *c, struct inode *dir) +int ubifs_check_dir_empty(struct inode *dir) { - struct qstr nm = { .name = NULL }; + struct ubifs_info *c = dir->i_sb->s_fs_info; + struct fscrypt_name nm = { 0 }; struct ubifs_dent_node *dent; union ubifs_key key; int err; @@ -743,10 +906,10 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry) { struct ubifs_info *c = dir->i_sb->s_fs_info; struct inode *inode = d_inode(dentry); - int sz_change = CALC_DENT_SIZE(dentry->d_name.len); - int err, budgeted = 1; + int err, sz_change, budgeted = 1; struct ubifs_inode *dir_ui = ubifs_inode(dir); struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 }; + struct fscrypt_name nm; /* * Budget request settings: deletion direntry, deletion inode and @@ -758,14 +921,26 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry) inode->i_ino, dir->i_ino); ubifs_assert(inode_is_locked(dir)); ubifs_assert(inode_is_locked(inode)); - err = check_dir_empty(c, d_inode(dentry)); + err = ubifs_check_dir_empty(d_inode(dentry)); if (err) return err; + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err && err != -ENOKEY) + return err; + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm); + if (err) + return err; + + sz_change = CALC_DENT_SIZE(fname_len(&nm)); + err = ubifs_budget_space(c, &req); if (err) { if (err != -ENOSPC) - return err; + goto out_fname; budgeted = 0; } @@ -776,7 +951,7 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry) dir->i_size -= sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0); if (err) goto out_cancel; unlock_2_inodes(dir, inode); @@ -788,6 +963,7 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry) c->bi.nospace = c->bi.nospace_rp = 0; smp_wmb(); } + fscrypt_free_filename(&nm); return 0; out_cancel: @@ -798,6 +974,8 @@ out_cancel: unlock_2_inodes(dir, inode); if (budgeted) ubifs_release_budget(c, &req); +out_fname: + fscrypt_free_filename(&nm); return err; } @@ -806,8 +984,9 @@ static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) struct inode *inode; struct ubifs_inode *dir_ui = ubifs_inode(dir); struct ubifs_info *c = dir->i_sb->s_fs_info; - int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len); + int err, sz_change; struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 }; + struct fscrypt_name nm; /* * Budget request settings: new inode, new direntry and changing parent @@ -821,10 +1000,27 @@ static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) if (err) return err; + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err) + goto out_budg; + + if (!fscrypt_has_encryption_key(dir)) { + err = -EPERM; + goto out_budg; + } + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); + if (err) + goto out_budg; + + sz_change = CALC_DENT_SIZE(fname_len(&nm)); + inode = ubifs_new_inode(c, dir, S_IFDIR | mode); if (IS_ERR(inode)) { err = PTR_ERR(inode); - goto out_budg; + goto out_fname; } err = ubifs_init_security(dir, inode, &dentry->d_name); @@ -838,7 +1034,7 @@ static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0); if (err) { ubifs_err(c, "cannot create directory, error %d", err); goto out_cancel; @@ -847,6 +1043,7 @@ static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) ubifs_release_budget(c, &req); d_instantiate(dentry, inode); + fscrypt_free_filename(&nm); return 0; out_cancel: @@ -857,6 +1054,8 @@ out_cancel: out_inode: make_bad_inode(inode); iput(inode); +out_fname: + fscrypt_free_filename(&nm); out_budg: ubifs_release_budget(c, &req); return err; @@ -870,11 +1069,12 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry, struct ubifs_inode *dir_ui = ubifs_inode(dir); struct ubifs_info *c = dir->i_sb->s_fs_info; union ubifs_dev_desc *dev = NULL; - int sz_change = CALC_DENT_SIZE(dentry->d_name.len); + int sz_change; int err, devlen = 0; struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1, .new_ino_d = ALIGN(devlen, 8), .dirtied_ino = 1 }; + struct fscrypt_name nm; /* * Budget request settings: new inode, new direntry and changing parent @@ -896,11 +1096,28 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry, return err; } + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err) + goto out_budg; + + if (!fscrypt_has_encryption_key(dir)) { + err = -EPERM; + goto out_budg; + } + } + + err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); + if (err) + goto out_budg; + + sz_change = CALC_DENT_SIZE(fname_len(&nm)); + inode = ubifs_new_inode(c, dir, mode); if (IS_ERR(inode)) { kfree(dev); err = PTR_ERR(inode); - goto out_budg; + goto out_fname; } init_special_inode(inode, inode->i_mode, rdev); @@ -917,7 +1134,7 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry, dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0); if (err) goto out_cancel; mutex_unlock(&dir_ui->ui_mutex); @@ -925,6 +1142,7 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry, ubifs_release_budget(c, &req); insert_inode_hash(inode); d_instantiate(dentry, inode); + fscrypt_free_filename(&nm); return 0; out_cancel: @@ -934,6 +1152,8 @@ out_cancel: out_inode: make_bad_inode(inode); iput(inode); +out_fname: + fscrypt_free_filename(&nm); out_budg: ubifs_release_budget(c, &req); return err; @@ -947,10 +1167,27 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, struct ubifs_inode *dir_ui = ubifs_inode(dir); struct ubifs_info *c = dir->i_sb->s_fs_info; int err, len = strlen(symname); - int sz_change = CALC_DENT_SIZE(dentry->d_name.len); + int sz_change = CALC_DENT_SIZE(len); + struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); + struct fscrypt_symlink_data *sd = NULL; struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1, .new_ino_d = ALIGN(len, 8), .dirtied_ino = 1 }; + struct fscrypt_name nm; + + if (ubifs_crypt_is_encrypted(dir)) { + err = fscrypt_get_encryption_info(dir); + if (err) + goto out_budg; + + if (!fscrypt_has_encryption_key(dir)) { + err = -EPERM; + goto out_budg; + } + + disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + + sizeof(struct fscrypt_symlink_data)); + } /* * Budget request settings: new inode, new direntry and changing parent @@ -960,36 +1197,77 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry, symname, dir->i_ino); - if (len > UBIFS_MAX_INO_DATA) + if (disk_link.len > UBIFS_MAX_INO_DATA) return -ENAMETOOLONG; err = ubifs_budget_space(c, &req); if (err) return err; + err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); + if (err) + goto out_budg; + inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO); if (IS_ERR(inode)) { err = PTR_ERR(inode); - goto out_budg; + goto out_fname; } ui = ubifs_inode(inode); - ui->data = kmalloc(len + 1, GFP_NOFS); + ui->data = kmalloc(disk_link.len, GFP_NOFS); if (!ui->data) { err = -ENOMEM; goto out_inode; } - memcpy(ui->data, symname, len); - ((char *)ui->data)[len] = '\0'; - inode->i_link = ui->data; + if (ubifs_crypt_is_encrypted(dir)) { + struct qstr istr = QSTR_INIT(symname, len); + struct fscrypt_str ostr; + + sd = kzalloc(disk_link.len, GFP_NOFS); + if (!sd) { + err = -ENOMEM; + goto out_inode; + } + + err = fscrypt_get_encryption_info(inode); + if (err) { + kfree(sd); + goto out_inode; + } + + if (!fscrypt_has_encryption_key(inode)) { + kfree(sd); + err = -EPERM; + goto out_inode; + } + + ostr.name = sd->encrypted_path; + ostr.len = disk_link.len; + + err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); + if (err) { + kfree(sd); + goto out_inode; + } + + sd->len = cpu_to_le16(ostr.len); + disk_link.name = (char *)sd; + } else { + inode->i_link = ui->data; + } + + memcpy(ui->data, disk_link.name, disk_link.len); + ((char *)ui->data)[disk_link.len - 1] = '\0'; + /* * The terminating zero byte is not written to the flash media and it * is put just to make later in-memory string processing simpler. Thus, * data length is @len, not @len + %1. */ - ui->data_len = len; - inode->i_size = ubifs_inode(inode)->ui_size = len; + ui->data_len = disk_link.len - 1; + inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1; err = ubifs_init_security(dir, inode, &dentry->d_name); if (err) @@ -999,7 +1277,7 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; dir->i_mtime = dir->i_ctime = inode->i_ctime; - err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0); + err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0); if (err) goto out_cancel; mutex_unlock(&dir_ui->ui_mutex); @@ -1007,6 +1285,7 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, ubifs_release_budget(c, &req); insert_inode_hash(inode); d_instantiate(dentry, inode); + fscrypt_free_filename(&nm); return 0; out_cancel: @@ -1016,6 +1295,8 @@ out_cancel: out_inode: make_bad_inode(inode); iput(inode); +out_fname: + fscrypt_free_filename(&nm); out_budg: ubifs_release_budget(c, &req); return err; @@ -1078,15 +1359,14 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry, struct ubifs_inode *whiteout_ui = NULL; int err, release, sync = 0, move = (new_dir != old_dir); int is_dir = S_ISDIR(old_inode->i_mode); - int unlink = !!new_inode; - int new_sz = CALC_DENT_SIZE(new_dentry->d_name.len); - int old_sz = CALC_DENT_SIZE(old_dentry->d_name.len); + int unlink = !!new_inode, new_sz, old_sz; struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1, .dirtied_ino = 3 }; struct ubifs_budget_req ino_req = { .dirtied_ino = 1, .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) }; struct timespec time; unsigned int uninitialized_var(saved_nlink); + struct fscrypt_name old_nm, new_nm; if (flags & ~RENAME_NOREPLACE) return -EINVAL; @@ -1107,17 +1387,41 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry, if (unlink) ubifs_assert(inode_is_locked(new_inode)); + if (old_dir != new_dir) { + if (ubifs_crypt_is_encrypted(new_dir) && + !fscrypt_has_permitted_context(new_dir, old_inode)) + return -EPERM; + } + if (unlink && is_dir) { - err = check_dir_empty(c, new_inode); + err = ubifs_check_dir_empty(new_inode); if (err) return err; } - err = ubifs_budget_space(c, &req); + err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm); if (err) return err; + + err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm); + if (err) { + fscrypt_free_filename(&old_nm); + return err; + } + + new_sz = CALC_DENT_SIZE(fname_len(&new_nm)); + old_sz = CALC_DENT_SIZE(fname_len(&old_nm)); + + err = ubifs_budget_space(c, &req); + if (err) { + fscrypt_free_filename(&old_nm); + fscrypt_free_filename(&new_nm); + return err; + } err = ubifs_budget_space(c, &ino_req); if (err) { + fscrypt_free_filename(&old_nm); + fscrypt_free_filename(&new_nm); ubifs_release_budget(c, &req); return err; } @@ -1239,8 +1543,8 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry, iput(whiteout); } - err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry, whiteout, - sync); + err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir, + new_inode, &new_nm, whiteout, sync); if (err) goto out_cancel; @@ -1256,6 +1560,9 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry, ubifs_release_budget(c, &ino_req); if (IS_SYNC(old_inode)) err = old_inode->i_sb->s_op->write_inode(old_inode, NULL); + + fscrypt_free_filename(&old_nm); + fscrypt_free_filename(&new_nm); return err; out_cancel: @@ -1284,6 +1591,8 @@ out_cancel: unlock_4_inodes(old_dir, new_dir, new_inode, whiteout); ubifs_release_budget(c, &ino_req); ubifs_release_budget(c, &req); + fscrypt_free_filename(&old_nm); + fscrypt_free_filename(&new_nm); return err; } @@ -1298,9 +1607,27 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry, struct inode *snd_inode = d_inode(new_dentry); struct timespec time; int err; + struct fscrypt_name fst_nm, snd_nm; ubifs_assert(fst_inode && snd_inode); + if ((ubifs_crypt_is_encrypted(old_dir) || + ubifs_crypt_is_encrypted(new_dir)) && + (old_dir != new_dir) && + (!fscrypt_has_permitted_context(new_dir, fst_inode) || + !fscrypt_has_permitted_context(old_dir, snd_inode))) + return -EPERM; + + err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm); + if (err) + return err; + + err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm); + if (err) { + fscrypt_free_filename(&fst_nm); + return err; + } + lock_4_inodes(old_dir, new_dir, NULL, NULL); time = ubifs_current_time(old_dir); @@ -1320,12 +1647,14 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry, } } - err = ubifs_jnl_xrename(c, old_dir, old_dentry, new_dir, new_dentry, - sync); + err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir, + snd_inode, &snd_nm, sync); unlock_4_inodes(old_dir, new_dir, NULL, NULL); ubifs_release_budget(c, &req); + fscrypt_free_filename(&fst_nm); + fscrypt_free_filename(&snd_nm); return err; } @@ -1384,6 +1713,14 @@ int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry, return 0; } +static int ubifs_dir_open(struct inode *dir, struct file *file) +{ + if (ubifs_crypt_is_encrypted(dir)) + return fscrypt_get_encryption_info(dir) ? -EACCES : 0; + + return 0; +} + const struct inode_operations ubifs_dir_inode_operations = { .lookup = ubifs_lookup, .create = ubifs_create, @@ -1410,6 +1747,7 @@ const struct file_operations ubifs_dir_operations = { .iterate_shared = ubifs_readdir, .fsync = ubifs_fsync, .unlocked_ioctl = ubifs_ioctl, + .open = ubifs_dir_open, #ifdef CONFIG_COMPAT .compat_ioctl = ubifs_compat_ioctl, #endif diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index b4fbeefba246..aa0625f4f642 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -78,6 +78,13 @@ static int read_block(struct inode *inode, void *addr, unsigned int block, goto dump; dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ; + + if (ubifs_crypt_is_encrypted(inode)) { + err = ubifs_decrypt(inode, dn, &dlen, block); + if (err) + goto dump; + } + out_len = UBIFS_BLOCK_SIZE; err = ubifs_decompress(c, &dn->data, dlen, addr, &out_len, le16_to_cpu(dn->compr_type)); @@ -650,6 +657,13 @@ static int populate_page(struct ubifs_info *c, struct page *page, dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ; out_len = UBIFS_BLOCK_SIZE; + + if (ubifs_crypt_is_encrypted(inode)) { + err = ubifs_decrypt(inode, dn, &dlen, page_block); + if (err) + goto out_err; + } + err = ubifs_decompress(c, &dn->data, dlen, addr, &out_len, le16_to_cpu(dn->compr_type)); if (err || len != out_len) @@ -1594,6 +1608,15 @@ static const struct vm_operations_struct ubifs_file_vm_ops = { static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma) { int err; + struct inode *inode = file->f_mapping->host; + + if (ubifs_crypt_is_encrypted(inode)) { + err = fscrypt_get_encryption_info(inode); + if (err) + return -EACCES; + if (!fscrypt_has_encryption_key(inode)) + return -ENOKEY; + } err = generic_file_mmap(file, vma); if (err) @@ -1605,6 +1628,88 @@ static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma) return 0; } +static int ubifs_file_open(struct inode *inode, struct file *filp) +{ + int ret; + struct dentry *dir; + struct ubifs_info *c = inode->i_sb->s_fs_info; + + if (ubifs_crypt_is_encrypted(inode)) { + ret = fscrypt_get_encryption_info(inode); + if (ret) + return -EACCES; + if (!fscrypt_has_encryption_key(inode)) + return -ENOKEY; + } + + dir = dget_parent(file_dentry(filp)); + if (ubifs_crypt_is_encrypted(d_inode(dir)) && + !fscrypt_has_permitted_context(d_inode(dir), inode)) { + ubifs_err(c, "Inconsistent encryption contexts: %lu/%lu", + (unsigned long) d_inode(dir)->i_ino, + (unsigned long) inode->i_ino); + dput(dir); + ubifs_ro_mode(c, -EPERM); + return -EPERM; + } + dput(dir); + + return 0; +} + +static const char *ubifs_get_link(struct dentry *dentry, + struct inode *inode, + struct delayed_call *done) +{ + int err; + struct fscrypt_symlink_data *sd; + struct ubifs_inode *ui = ubifs_inode(inode); + struct fscrypt_str cstr; + struct fscrypt_str pstr; + + if (!ubifs_crypt_is_encrypted(inode)) + return ui->data; + + if (!dentry) + return ERR_PTR(-ECHILD); + + err = fscrypt_get_encryption_info(inode); + if (err) + return ERR_PTR(err); + + sd = (struct fscrypt_symlink_data *)ui->data; + cstr.name = sd->encrypted_path; + cstr.len = le16_to_cpu(sd->len); + + if (cstr.len == 0) + return ERR_PTR(-ENOENT); + + if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > ui->data_len) + return ERR_PTR(-EIO); + + err = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); + if (err) + return ERR_PTR(err); + + err = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); + if (err) { + fscrypt_fname_free_buffer(&pstr); + return ERR_PTR(err); + } + + pstr.name[pstr.len] = '\0'; + + // XXX this probably won't happen anymore... + if (pstr.name[0] == '\0') { + fscrypt_fname_free_buffer(&pstr); + return ERR_PTR(-ENOENT); + } + + set_delayed_call(done, kfree_link, pstr.name); + return pstr.name; +} + + const struct address_space_operations ubifs_file_address_operations = { .readpage = ubifs_readpage, .writepage = ubifs_writepage, @@ -1629,7 +1734,7 @@ const struct inode_operations ubifs_file_inode_operations = { const struct inode_operations ubifs_symlink_inode_operations = { .readlink = generic_readlink, - .get_link = simple_get_link, + .get_link = ubifs_get_link, .setattr = ubifs_setattr, .getattr = ubifs_getattr, .listxattr = ubifs_listxattr, @@ -1647,6 +1752,7 @@ const struct file_operations ubifs_file_operations = { .unlocked_ioctl = ubifs_ioctl, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, + .open = ubifs_file_open, #ifdef CONFIG_COMPAT .compat_ioctl = ubifs_compat_ioctl, #endif diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c index e845c64b6ce1..7b35e3d6cde7 100644 --- a/fs/ubifs/gc.c +++ b/fs/ubifs/gc.c @@ -846,10 +846,6 @@ int ubifs_gc_start_commit(struct ubifs_info *c) */ while (1) { lp = ubifs_fast_find_freeable(c); - if (IS_ERR(lp)) { - err = PTR_ERR(lp); - goto out; - } if (!lp) break; ubifs_assert(!(lp->flags & LPROPS_TAKEN)); diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c index 97be41215332..3be28900bf37 100644 --- a/fs/ubifs/io.c +++ b/fs/ubifs/io.c @@ -452,16 +452,22 @@ static enum hrtimer_restart wbuf_timer_callback_nolock(struct hrtimer *timer) */ static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf) { + ktime_t softlimit = ms_to_ktime(dirty_writeback_interval * 10); + unsigned long long delta = dirty_writeback_interval; + + /* centi to milli, milli to nano, then 10% */ + delta *= 10ULL * NSEC_PER_MSEC / 10ULL; + ubifs_assert(!hrtimer_active(&wbuf->timer)); + ubifs_assert(delta <= ULONG_MAX); if (wbuf->no_timer) return; dbg_io("set timer for jhead %s, %llu-%llu millisecs", dbg_jhead(wbuf->jhead), - div_u64(ktime_to_ns(wbuf->softlimit), USEC_PER_SEC), - div_u64(ktime_to_ns(wbuf->softlimit) + wbuf->delta, - USEC_PER_SEC)); - hrtimer_start_range_ns(&wbuf->timer, wbuf->softlimit, wbuf->delta, + div_u64(ktime_to_ns(softlimit), USEC_PER_SEC), + div_u64(ktime_to_ns(softlimit) + delta, USEC_PER_SEC)); + hrtimer_start_range_ns(&wbuf->timer, softlimit, delta, HRTIMER_MODE_REL); } @@ -1059,10 +1065,6 @@ int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf) hrtimer_init(&wbuf->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); wbuf->timer.function = wbuf_timer_callback_nolock; - wbuf->softlimit = ktime_set(WBUF_TIMEOUT_SOFTLIMIT, 0); - wbuf->delta = WBUF_TIMEOUT_HARDLIMIT - WBUF_TIMEOUT_SOFTLIMIT; - wbuf->delta *= 1000000000ULL; - ubifs_assert(wbuf->delta <= ULONG_MAX); return 0; } diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c index 3c7b29de0ca7..78d713644df3 100644 --- a/fs/ubifs/ioctl.c +++ b/fs/ubifs/ioctl.c @@ -181,6 +181,26 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg) mnt_drop_write_file(file); return err; } + case FS_IOC_SET_ENCRYPTION_POLICY: { +#ifdef CONFIG_UBIFS_FS_ENCRYPTION + struct ubifs_info *c = inode->i_sb->s_fs_info; + + err = ubifs_enable_encryption(c); + if (err) + return err; + + return fscrypt_ioctl_set_policy(file, (const void __user *)arg); +#else + return -EOPNOTSUPP; +#endif + } + case FS_IOC_GET_ENCRYPTION_POLICY: { +#ifdef CONFIG_UBIFS_FS_ENCRYPTION + return fscrypt_ioctl_get_policy(file, (void __user *)arg); +#else + return -EOPNOTSUPP; +#endif + } default: return -ENOTTY; diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c index 91bc76dc559e..a459211a1c21 100644 --- a/fs/ubifs/journal.c +++ b/fs/ubifs/journal.c @@ -78,16 +78,6 @@ static inline void zero_ino_node_unused(struct ubifs_ino_node *ino) static inline void zero_dent_node_unused(struct ubifs_dent_node *dent) { dent->padding1 = 0; - memset(dent->padding2, 0, 4); -} - -/** - * zero_data_node_unused - zero out unused fields of an on-flash data node. - * @data: the data node to zero out - */ -static inline void zero_data_node_unused(struct ubifs_data_node *data) -{ - memset(data->padding, 0, 2); } /** @@ -511,6 +501,14 @@ static void mark_inode_clean(struct ubifs_info *c, struct ubifs_inode *ui) ui->dirty = 0; } +static void set_dent_cookie(struct ubifs_info *c, struct ubifs_dent_node *dent) +{ + if (c->double_hash) + dent->cookie = prandom_u32(); + else + dent->cookie = 0; +} + /** * ubifs_jnl_update - update inode. * @c: UBIFS file-system description object @@ -539,7 +537,7 @@ static void mark_inode_clean(struct ubifs_info *c, struct ubifs_inode *ui) * success. In case of failure, a negative error code is returned. */ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, - const struct qstr *nm, const struct inode *inode, + const struct fscrypt_name *nm, const struct inode *inode, int deletion, int xent) { int err, dlen, ilen, len, lnum, ino_offs, dent_offs; @@ -551,11 +549,11 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, struct ubifs_ino_node *ino; union ubifs_key dent_key, ino_key; - dbg_jnl("ino %lu, dent '%.*s', data len %d in dir ino %lu", - inode->i_ino, nm->len, nm->name, ui->data_len, dir->i_ino); + //dbg_jnl("ino %lu, dent '%.*s', data len %d in dir ino %lu", + // inode->i_ino, nm->len, nm->name, ui->data_len, dir->i_ino); ubifs_assert(mutex_is_locked(&host_ui->ui_mutex)); - dlen = UBIFS_DENT_NODE_SZ + nm->len + 1; + dlen = UBIFS_DENT_NODE_SZ + fname_len(nm) + 1; ilen = UBIFS_INO_NODE_SZ; /* @@ -596,9 +594,11 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, key_write(c, &dent_key, dent->key); dent->inum = deletion ? 0 : cpu_to_le64(inode->i_ino); dent->type = get_dent_type(inode->i_mode); - dent->nlen = cpu_to_le16(nm->len); - memcpy(dent->name, nm->name, nm->len); - dent->name[nm->len] = '\0'; + dent->nlen = cpu_to_le16(fname_len(nm)); + memcpy(dent->name, fname_name(nm), fname_len(nm)); + dent->name[fname_len(nm)] = '\0'; + set_dent_cookie(c, dent); + zero_dent_node_unused(dent); ubifs_prep_grp_node(c, dent, dlen, 0); @@ -697,14 +697,18 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode, const union ubifs_key *key, const void *buf, int len) { struct ubifs_data_node *data; - int err, lnum, offs, compr_type, out_len; + int err, lnum, offs, compr_type, out_len, compr_len; int dlen = COMPRESSED_DATA_NODE_BUF_SZ, allocated = 1; struct ubifs_inode *ui = ubifs_inode(inode); + bool encrypted = ubifs_crypt_is_encrypted(inode); dbg_jnlk(key, "ino %lu, blk %u, len %d, key ", (unsigned long)key_inum(c, key), key_block(c, key), len); ubifs_assert(len <= UBIFS_BLOCK_SIZE); + if (encrypted) + dlen += UBIFS_CIPHER_BLOCK_SIZE; + data = kmalloc(dlen, GFP_NOFS | __GFP_NOWARN); if (!data) { /* @@ -722,7 +726,6 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode, data->ch.node_type = UBIFS_DATA_NODE; key_write(c, key, &data->key); data->size = cpu_to_le32(len); - zero_data_node_unused(data); if (!(ui->flags & UBIFS_COMPR_FL)) /* Compression is disabled for this inode */ @@ -730,9 +733,18 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode, else compr_type = ui->compr_type; - out_len = dlen - UBIFS_DATA_NODE_SZ; - ubifs_compress(c, buf, len, &data->data, &out_len, &compr_type); - ubifs_assert(out_len <= UBIFS_BLOCK_SIZE); + out_len = compr_len = dlen - UBIFS_DATA_NODE_SZ; + ubifs_compress(c, buf, len, &data->data, &compr_len, &compr_type); + ubifs_assert(compr_len <= UBIFS_BLOCK_SIZE); + + if (encrypted) { + err = ubifs_encrypt(inode, data, compr_len, &out_len, key_block(c, key)); + if (err) + goto out_free; + + } else { + data->compr_size = 0; + } dlen = UBIFS_DATA_NODE_SZ + out_len; data->compr_type = cpu_to_le16(compr_type); @@ -911,9 +923,11 @@ int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode) * ubifs_jnl_xrename - cross rename two directory entries. * @c: UBIFS file-system description object * @fst_dir: parent inode of 1st directory entry to exchange - * @fst_dentry: 1st directory entry to exchange + * @fst_inode: 1st inode to exchange + * @fst_nm: name of 1st inode to exchange * @snd_dir: parent inode of 2nd directory entry to exchange - * @snd_dentry: 2nd directory entry to exchange + * @snd_inode: 2nd inode to exchange + * @snd_nm: name of 2nd inode to exchange * @sync: non-zero if the write-buffer has to be synchronized * * This function implements the cross rename operation which may involve @@ -922,29 +936,29 @@ int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode) * returned. */ int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir, - const struct dentry *fst_dentry, + const struct inode *fst_inode, + const struct fscrypt_name *fst_nm, const struct inode *snd_dir, - const struct dentry *snd_dentry, int sync) + const struct inode *snd_inode, + const struct fscrypt_name *snd_nm, int sync) { union ubifs_key key; struct ubifs_dent_node *dent1, *dent2; int err, dlen1, dlen2, lnum, offs, len, plen = UBIFS_INO_NODE_SZ; int aligned_dlen1, aligned_dlen2; int twoparents = (fst_dir != snd_dir); - const struct inode *fst_inode = d_inode(fst_dentry); - const struct inode *snd_inode = d_inode(snd_dentry); void *p; - dbg_jnl("dent '%pd' in dir ino %lu between dent '%pd' in dir ino %lu", - fst_dentry, fst_dir->i_ino, snd_dentry, snd_dir->i_ino); + //dbg_jnl("dent '%pd' in dir ino %lu between dent '%pd' in dir ino %lu", + // fst_dentry, fst_dir->i_ino, snd_dentry, snd_dir->i_ino); ubifs_assert(ubifs_inode(fst_dir)->data_len == 0); ubifs_assert(ubifs_inode(snd_dir)->data_len == 0); ubifs_assert(mutex_is_locked(&ubifs_inode(fst_dir)->ui_mutex)); ubifs_assert(mutex_is_locked(&ubifs_inode(snd_dir)->ui_mutex)); - dlen1 = UBIFS_DENT_NODE_SZ + snd_dentry->d_name.len + 1; - dlen2 = UBIFS_DENT_NODE_SZ + fst_dentry->d_name.len + 1; + dlen1 = UBIFS_DENT_NODE_SZ + fname_len(snd_nm) + 1; + dlen2 = UBIFS_DENT_NODE_SZ + fname_len(fst_nm) + 1; aligned_dlen1 = ALIGN(dlen1, 8); aligned_dlen2 = ALIGN(dlen2, 8); @@ -963,24 +977,24 @@ int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir, /* Make new dent for 1st entry */ dent1->ch.node_type = UBIFS_DENT_NODE; - dent_key_init_flash(c, &dent1->key, snd_dir->i_ino, &snd_dentry->d_name); + dent_key_init_flash(c, &dent1->key, snd_dir->i_ino, snd_nm); dent1->inum = cpu_to_le64(fst_inode->i_ino); dent1->type = get_dent_type(fst_inode->i_mode); - dent1->nlen = cpu_to_le16(snd_dentry->d_name.len); - memcpy(dent1->name, snd_dentry->d_name.name, snd_dentry->d_name.len); - dent1->name[snd_dentry->d_name.len] = '\0'; + dent1->nlen = cpu_to_le16(fname_len(snd_nm)); + memcpy(dent1->name, fname_name(snd_nm), fname_len(snd_nm)); + dent1->name[fname_len(snd_nm)] = '\0'; zero_dent_node_unused(dent1); ubifs_prep_grp_node(c, dent1, dlen1, 0); /* Make new dent for 2nd entry */ dent2 = (void *)dent1 + aligned_dlen1; dent2->ch.node_type = UBIFS_DENT_NODE; - dent_key_init_flash(c, &dent2->key, fst_dir->i_ino, &fst_dentry->d_name); + dent_key_init_flash(c, &dent2->key, fst_dir->i_ino, fst_nm); dent2->inum = cpu_to_le64(snd_inode->i_ino); dent2->type = get_dent_type(snd_inode->i_mode); - dent2->nlen = cpu_to_le16(fst_dentry->d_name.len); - memcpy(dent2->name, fst_dentry->d_name.name, fst_dentry->d_name.len); - dent2->name[fst_dentry->d_name.len] = '\0'; + dent2->nlen = cpu_to_le16(fname_len(fst_nm)); + memcpy(dent2->name, fname_name(fst_nm), fname_len(fst_nm)); + dent2->name[fname_len(fst_nm)] = '\0'; zero_dent_node_unused(dent2); ubifs_prep_grp_node(c, dent2, dlen2, 0); @@ -1004,14 +1018,14 @@ int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir, } release_head(c, BASEHD); - dent_key_init(c, &key, snd_dir->i_ino, &snd_dentry->d_name); - err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, &snd_dentry->d_name); + dent_key_init(c, &key, snd_dir->i_ino, snd_nm); + err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, snd_nm); if (err) goto out_ro; offs += aligned_dlen1; - dent_key_init(c, &key, fst_dir->i_ino, &fst_dentry->d_name); - err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, &fst_dentry->d_name); + dent_key_init(c, &key, fst_dir->i_ino, fst_nm); + err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, fst_nm); if (err) goto out_ro; @@ -1063,31 +1077,31 @@ out_free: * returned. */ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, - const struct dentry *old_dentry, + const struct inode *old_inode, + const struct fscrypt_name *old_nm, const struct inode *new_dir, - const struct dentry *new_dentry, + const struct inode *new_inode, + const struct fscrypt_name *new_nm, const struct inode *whiteout, int sync) { void *p; union ubifs_key key; struct ubifs_dent_node *dent, *dent2; int err, dlen1, dlen2, ilen, lnum, offs, len; - const struct inode *old_inode = d_inode(old_dentry); - const struct inode *new_inode = d_inode(new_dentry); int aligned_dlen1, aligned_dlen2, plen = UBIFS_INO_NODE_SZ; int last_reference = !!(new_inode && new_inode->i_nlink == 0); int move = (old_dir != new_dir); struct ubifs_inode *uninitialized_var(new_ui); - dbg_jnl("dent '%pd' in dir ino %lu to dent '%pd' in dir ino %lu", - old_dentry, old_dir->i_ino, new_dentry, new_dir->i_ino); + //dbg_jnl("dent '%pd' in dir ino %lu to dent '%pd' in dir ino %lu", + // old_dentry, old_dir->i_ino, new_dentry, new_dir->i_ino); ubifs_assert(ubifs_inode(old_dir)->data_len == 0); ubifs_assert(ubifs_inode(new_dir)->data_len == 0); ubifs_assert(mutex_is_locked(&ubifs_inode(old_dir)->ui_mutex)); ubifs_assert(mutex_is_locked(&ubifs_inode(new_dir)->ui_mutex)); - dlen1 = UBIFS_DENT_NODE_SZ + new_dentry->d_name.len + 1; - dlen2 = UBIFS_DENT_NODE_SZ + old_dentry->d_name.len + 1; + dlen1 = UBIFS_DENT_NODE_SZ + fname_len(new_nm) + 1; + dlen2 = UBIFS_DENT_NODE_SZ + fname_len(old_nm) + 1; if (new_inode) { new_ui = ubifs_inode(new_inode); ubifs_assert(mutex_is_locked(&new_ui->ui_mutex)); @@ -1113,19 +1127,19 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, /* Make new dent */ dent->ch.node_type = UBIFS_DENT_NODE; - dent_key_init_flash(c, &dent->key, new_dir->i_ino, &new_dentry->d_name); + dent_key_init_flash(c, &dent->key, new_dir->i_ino, new_nm); dent->inum = cpu_to_le64(old_inode->i_ino); dent->type = get_dent_type(old_inode->i_mode); - dent->nlen = cpu_to_le16(new_dentry->d_name.len); - memcpy(dent->name, new_dentry->d_name.name, new_dentry->d_name.len); - dent->name[new_dentry->d_name.len] = '\0'; + dent->nlen = cpu_to_le16(fname_len(new_nm)); + memcpy(dent->name, fname_name(new_nm), fname_len(new_nm)); + dent->name[fname_len(new_nm)] = '\0'; + set_dent_cookie(c, dent); zero_dent_node_unused(dent); ubifs_prep_grp_node(c, dent, dlen1, 0); dent2 = (void *)dent + aligned_dlen1; dent2->ch.node_type = UBIFS_DENT_NODE; - dent_key_init_flash(c, &dent2->key, old_dir->i_ino, - &old_dentry->d_name); + dent_key_init_flash(c, &dent2->key, old_dir->i_ino, old_nm); if (whiteout) { dent2->inum = cpu_to_le64(whiteout->i_ino); @@ -1135,9 +1149,10 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, dent2->inum = 0; dent2->type = DT_UNKNOWN; } - dent2->nlen = cpu_to_le16(old_dentry->d_name.len); - memcpy(dent2->name, old_dentry->d_name.name, old_dentry->d_name.len); - dent2->name[old_dentry->d_name.len] = '\0'; + dent2->nlen = cpu_to_le16(fname_len(old_nm)); + memcpy(dent2->name, fname_name(old_nm), fname_len(old_nm)); + dent2->name[fname_len(old_nm)] = '\0'; + set_dent_cookie(c, dent2); zero_dent_node_unused(dent2); ubifs_prep_grp_node(c, dent2, dlen2, 0); @@ -1178,15 +1193,15 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, } release_head(c, BASEHD); - dent_key_init(c, &key, new_dir->i_ino, &new_dentry->d_name); - err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, &new_dentry->d_name); + dent_key_init(c, &key, new_dir->i_ino, new_nm); + err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, new_nm); if (err) goto out_ro; offs += aligned_dlen1; if (whiteout) { - dent_key_init(c, &key, old_dir->i_ino, &old_dentry->d_name); - err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, &old_dentry->d_name); + dent_key_init(c, &key, old_dir->i_ino, old_nm); + err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, old_nm); if (err) goto out_ro; @@ -1196,8 +1211,8 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, if (err) goto out_ro; - dent_key_init(c, &key, old_dir->i_ino, &old_dentry->d_name); - err = ubifs_tnc_remove_nm(c, &key, &old_dentry->d_name); + dent_key_init(c, &key, old_dir->i_ino, old_nm); + err = ubifs_tnc_remove_nm(c, &key, old_nm); if (err) goto out_ro; } @@ -1251,31 +1266,55 @@ out_free: } /** - * recomp_data_node - re-compress a truncated data node. + * truncate_data_node - re-compress/encrypt a truncated data node. + * @c: UBIFS file-system description object + * @inode: inode which referes to the data node + * @block: data block number * @dn: data node to re-compress * @new_len: new length * * This function is used when an inode is truncated and the last data node of - * the inode has to be re-compressed and re-written. + * the inode has to be re-compressed/encrypted and re-written. */ -static int recomp_data_node(const struct ubifs_info *c, - struct ubifs_data_node *dn, int *new_len) +static int truncate_data_node(const struct ubifs_info *c, const struct inode *inode, + unsigned int block, struct ubifs_data_node *dn, + int *new_len) { void *buf; - int err, len, compr_type, out_len; + int err, dlen, compr_type, out_len, old_dlen; out_len = le32_to_cpu(dn->size); buf = kmalloc(out_len * WORST_COMPR_FACTOR, GFP_NOFS); if (!buf) return -ENOMEM; - len = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ; + dlen = old_dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ; compr_type = le16_to_cpu(dn->compr_type); - err = ubifs_decompress(c, &dn->data, len, buf, &out_len, compr_type); - if (err) - goto out; - ubifs_compress(c, buf, *new_len, &dn->data, &out_len, &compr_type); + if (ubifs_crypt_is_encrypted(inode)) { + err = ubifs_decrypt(inode, dn, &dlen, block); + if (err) + goto out; + } + + if (compr_type != UBIFS_COMPR_NONE) { + err = ubifs_decompress(c, &dn->data, dlen, buf, &out_len, compr_type); + if (err) + goto out; + + ubifs_compress(c, buf, *new_len, &dn->data, &out_len, &compr_type); + } + + if (ubifs_crypt_is_encrypted(inode)) { + err = ubifs_encrypt(inode, dn, out_len, &old_dlen, block); + if (err) + goto out; + + out_len = old_dlen; + } else { + dn->compr_size = 0; + } + ubifs_assert(out_len <= UBIFS_BLOCK_SIZE); dn->compr_type = cpu_to_le16(compr_type); dn->size = cpu_to_le32(*new_len); @@ -1347,17 +1386,9 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode, if (le32_to_cpu(dn->size) <= dlen) dlen = 0; /* Nothing to do */ else { - int compr_type = le16_to_cpu(dn->compr_type); - - if (compr_type != UBIFS_COMPR_NONE) { - err = recomp_data_node(c, dn, &dlen); - if (err) - goto out_free; - } else { - dn->size = cpu_to_le32(dlen); - dlen += UBIFS_DATA_NODE_SZ; - } - zero_data_node_unused(dn); + err = truncate_data_node(c, inode, blk, dn, &dlen); + if (err) + goto out_free; } } } @@ -1442,7 +1473,8 @@ out_free: * error code in case of failure. */ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host, - const struct inode *inode, const struct qstr *nm) + const struct inode *inode, + const struct fscrypt_name *nm) { int err, xlen, hlen, len, lnum, xent_offs, aligned_xlen; struct ubifs_dent_node *xent; @@ -1451,9 +1483,9 @@ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host, int sync = IS_DIRSYNC(host); struct ubifs_inode *host_ui = ubifs_inode(host); - dbg_jnl("host %lu, xattr ino %lu, name '%s', data len %d", - host->i_ino, inode->i_ino, nm->name, - ubifs_inode(inode)->data_len); + //dbg_jnl("host %lu, xattr ino %lu, name '%s', data len %d", + // host->i_ino, inode->i_ino, nm->name, + // ubifs_inode(inode)->data_len); ubifs_assert(inode->i_nlink == 0); ubifs_assert(mutex_is_locked(&host_ui->ui_mutex)); @@ -1461,7 +1493,7 @@ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host, * Since we are deleting the inode, we do not bother to attach any data * to it and assume its length is %UBIFS_INO_NODE_SZ. */ - xlen = UBIFS_DENT_NODE_SZ + nm->len + 1; + xlen = UBIFS_DENT_NODE_SZ + fname_len(nm) + 1; aligned_xlen = ALIGN(xlen, 8); hlen = host_ui->data_len + UBIFS_INO_NODE_SZ; len = aligned_xlen + UBIFS_INO_NODE_SZ + ALIGN(hlen, 8); @@ -1482,9 +1514,9 @@ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host, key_write(c, &xent_key, xent->key); xent->inum = 0; xent->type = get_dent_type(inode->i_mode); - xent->nlen = cpu_to_le16(nm->len); - memcpy(xent->name, nm->name, nm->len); - xent->name[nm->len] = '\0'; + xent->nlen = cpu_to_le16(fname_len(nm)); + memcpy(xent->name, fname_name(nm), fname_len(nm)); + xent->name[fname_len(nm)] = '\0'; zero_dent_node_unused(xent); ubifs_prep_grp_node(c, xent, xlen, 0); diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h index c0a95e393347..7547be512db2 100644 --- a/fs/ubifs/key.h +++ b/fs/ubifs/key.h @@ -69,7 +69,7 @@ static inline uint32_t key_r5_hash(const char *s, int len) uint32_t a = 0; const signed char *str = (const signed char *)s; - while (*str) { + while (len--) { a += *str << 4; a += *str >> 4; a *= 11; @@ -153,13 +153,13 @@ static inline void highest_ino_key(const struct ubifs_info *c, * @c: UBIFS file-system description object * @key: key to initialize * @inum: parent inode number - * @nm: direntry name and length + * @nm: direntry name and length. Not a string when encrypted! */ static inline void dent_key_init(const struct ubifs_info *c, union ubifs_key *key, ino_t inum, - const struct qstr *nm) + const struct fscrypt_name *nm) { - uint32_t hash = c->key_hash(nm->name, nm->len); + uint32_t hash = c->key_hash(fname_name(nm), fname_len(nm)); ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK)); key->u32[0] = inum; @@ -191,10 +191,11 @@ static inline void dent_key_init_hash(const struct ubifs_info *c, * @nm: direntry name and length */ static inline void dent_key_init_flash(const struct ubifs_info *c, void *k, - ino_t inum, const struct qstr *nm) + ino_t inum, + const struct fscrypt_name *nm) { union ubifs_key *key = k; - uint32_t hash = c->key_hash(nm->name, nm->len); + uint32_t hash = c->key_hash(fname_name(nm), fname_len(nm)); ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK)); key->j32[0] = cpu_to_le32(inum); @@ -225,9 +226,9 @@ static inline void lowest_dent_key(const struct ubifs_info *c, */ static inline void xent_key_init(const struct ubifs_info *c, union ubifs_key *key, ino_t inum, - const struct qstr *nm) + const struct fscrypt_name *nm) { - uint32_t hash = c->key_hash(nm->name, nm->len); + uint32_t hash = c->key_hash(fname_name(nm), fname_len(nm)); ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK)); key->u32[0] = inum; @@ -242,10 +243,10 @@ static inline void xent_key_init(const struct ubifs_info *c, * @nm: extended attribute entry name and length */ static inline void xent_key_init_flash(const struct ubifs_info *c, void *k, - ino_t inum, const struct qstr *nm) + ino_t inum, const struct fscrypt_name *nm) { union ubifs_key *key = k; - uint32_t hash = c->key_hash(nm->name, nm->len); + uint32_t hash = c->key_hash(fname_name(nm), fname_len(nm)); ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK)); key->j32[0] = cpu_to_le32(inum); diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c index fb0f44cd1e28..ae5c02f22f3e 100644 --- a/fs/ubifs/replay.c +++ b/fs/ubifs/replay.c @@ -61,7 +61,7 @@ struct replay_entry { struct list_head list; union ubifs_key key; union { - struct qstr nm; + struct fscrypt_name nm; struct { loff_t old_size; loff_t new_size; @@ -327,7 +327,7 @@ static void destroy_replay_list(struct ubifs_info *c) list_for_each_entry_safe(r, tmp, &c->replay_list, list) { if (is_hash_key(c, &r->key)) - kfree(r->nm.name); + kfree(fname_name(&r->nm)); list_del(&r->list); kfree(r); } @@ -430,10 +430,10 @@ static int insert_dent(struct ubifs_info *c, int lnum, int offs, int len, r->deletion = !!deletion; r->sqnum = sqnum; key_copy(c, key, &r->key); - r->nm.len = nlen; + fname_len(&r->nm) = nlen; memcpy(nbuf, name, nlen); nbuf[nlen] = '\0'; - r->nm.name = nbuf; + fname_name(&r->nm) = nbuf; list_add_tail(&r->list, &c->replay_list); return 0; @@ -456,7 +456,7 @@ int ubifs_validate_entry(struct ubifs_info *c, if (le32_to_cpu(dent->ch.len) != nlen + UBIFS_DENT_NODE_SZ + 1 || dent->type >= UBIFS_ITYPES_CNT || nlen > UBIFS_MAX_NLEN || dent->name[nlen] != 0 || - strnlen(dent->name, nlen) != nlen || + (key_type == UBIFS_XENT_KEY && strnlen(dent->name, nlen) != nlen) || le64_to_cpu(dent->inum) > MAX_INUM) { ubifs_err(c, "bad %s node", key_type == UBIFS_DENT_KEY ? "directory entry" : "extended attribute entry"); diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c index 3cbb904a6d7d..7f1ead29e727 100644 --- a/fs/ubifs/sb.c +++ b/fs/ubifs/sb.c @@ -163,6 +163,7 @@ static int create_default_filesystem(struct ubifs_info *c) tmp64 = (long long)max_buds * c->leb_size; if (big_lpt) sup_flags |= UBIFS_FLG_BIGLPT; + sup_flags |= UBIFS_FLG_DOUBLE_HASH; sup->ch.node_type = UBIFS_SB_NODE; sup->key_hash = UBIFS_KEY_HASH_R5; @@ -465,6 +466,16 @@ static int validate_sb(struct ubifs_info *c, struct ubifs_sb_node *sup) goto failed; } + if (!c->double_hash && c->fmt_version >= 5) { + err = 16; + goto failed; + } + + if (c->encrypted && c->fmt_version < 5) { + err = 17; + goto failed; + } + return 0; failed: @@ -620,6 +631,24 @@ int ubifs_read_superblock(struct ubifs_info *c) memcpy(&c->uuid, &sup->uuid, 16); c->big_lpt = !!(sup_flags & UBIFS_FLG_BIGLPT); c->space_fixup = !!(sup_flags & UBIFS_FLG_SPACE_FIXUP); + c->double_hash = !!(sup_flags & UBIFS_FLG_DOUBLE_HASH); + c->encrypted = !!(sup_flags & UBIFS_FLG_ENCRYPTION); + + if ((sup_flags & ~UBIFS_FLG_MASK) != 0) { + ubifs_err(c, "Unknown feature flags found: %#x", + sup_flags & ~UBIFS_FLG_MASK); + err = -EINVAL; + goto out; + } + +#ifndef CONFIG_UBIFS_FS_ENCRYPTION + if (c->encrypted) { + ubifs_err(c, "file system contains encrypted files but UBIFS" + " was built without crypto support."); + err = -EINVAL; + goto out; + } +#endif /* Automatically increase file system size to the maximum size */ c->old_leb_cnt = c->leb_cnt; @@ -807,3 +836,33 @@ int ubifs_fixup_free_space(struct ubifs_info *c) ubifs_msg(c, "free space fixup complete"); return err; } + +int ubifs_enable_encryption(struct ubifs_info *c) +{ + int err; + struct ubifs_sb_node *sup; + + if (c->encrypted) + return 0; + + if (c->ro_mount || c->ro_media) + return -EROFS; + + if (c->fmt_version < 5) { + ubifs_err(c, "on-flash format version 5 is needed for encryption"); + return -EINVAL; + } + + sup = ubifs_read_sb_node(c); + if (IS_ERR(sup)) + return PTR_ERR(sup); + + sup->flags |= cpu_to_le32(UBIFS_FLG_ENCRYPTION); + + err = ubifs_write_sb_node(c, sup); + if (!err) + c->encrypted = 1; + kfree(sup); + + return err; +} diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 4ec051089186..e08aa04fc835 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -198,7 +198,6 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum) } memcpy(ui->data, ino->data, ui->data_len); ((char *)ui->data)[ui->data_len] = '\0'; - inode->i_link = ui->data; break; case S_IFBLK: case S_IFCHR: @@ -380,6 +379,9 @@ out: } done: clear_inode(inode); +#ifdef CONFIG_UBIFS_FS_ENCRYPTION + fscrypt_put_encryption_info(inode, NULL); +#endif } static void ubifs_dirty_inode(struct inode *inode, int flags) @@ -1207,7 +1209,8 @@ static int mount_ubifs(struct ubifs_info *c) bu_init(c); if (!c->ro_mount) { - c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ, + c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ + \ + UBIFS_CIPHER_BLOCK_SIZE, GFP_KERNEL); if (!c->write_reserve_buf) goto out_free; @@ -1620,7 +1623,8 @@ static int ubifs_remount_rw(struct ubifs_info *c) goto out; } - c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ, GFP_KERNEL); + c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ + \ + UBIFS_CIPHER_BLOCK_SIZE, GFP_KERNEL); if (!c->write_reserve_buf) { err = -ENOMEM; goto out; @@ -1995,6 +1999,12 @@ static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi) return c; } +#ifndef CONFIG_UBIFS_FS_ENCRYPTION +struct fscrypt_operations ubifs_crypt_operations = { + .is_encrypted = __ubifs_crypt_is_encrypted, +}; +#endif + static int ubifs_fill_super(struct super_block *sb, void *data, int silent) { struct ubifs_info *c = sb->s_fs_info; @@ -2041,6 +2051,7 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent) sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE; sb->s_op = &ubifs_super_operations; sb->s_xattr = ubifs_xattr_handlers; + sb->s_cop = &ubifs_crypt_operations; mutex_lock(&c->umount_mutex); err = mount_ubifs(c); diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c index fa9a20cc60d6..74ae2de949df 100644 --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -378,7 +378,7 @@ static void lnc_free(struct ubifs_zbranch *zbr) } /** - * tnc_read_node_nm - read a "hashed" leaf node. + * tnc_read_hashed_node - read a "hashed" leaf node. * @c: UBIFS file-system description object * @zbr: key and position of the node * @node: node is returned here @@ -388,8 +388,8 @@ static void lnc_free(struct ubifs_zbranch *zbr) * added to LNC. Returns zero in case of success or a negative negative error * code in case of failure. */ -static int tnc_read_node_nm(struct ubifs_info *c, struct ubifs_zbranch *zbr, - void *node) +static int tnc_read_hashed_node(struct ubifs_info *c, struct ubifs_zbranch *zbr, + void *node) { int err; @@ -519,7 +519,7 @@ static int fallible_read_node(struct ubifs_info *c, const union ubifs_key *key, * of failure, a negative error code is returned. */ static int matches_name(struct ubifs_info *c, struct ubifs_zbranch *zbr, - const struct qstr *nm) + const struct fscrypt_name *nm) { struct ubifs_dent_node *dent; int nlen, err; @@ -542,11 +542,11 @@ static int matches_name(struct ubifs_info *c, struct ubifs_zbranch *zbr, dent = zbr->leaf; nlen = le16_to_cpu(dent->nlen); - err = memcmp(dent->name, nm->name, min_t(int, nlen, nm->len)); + err = memcmp(dent->name, fname_name(nm), min_t(int, nlen, fname_len(nm))); if (err == 0) { - if (nlen == nm->len) + if (nlen == fname_len(nm)) return NAME_MATCHES; - else if (nlen < nm->len) + else if (nlen < fname_len(nm)) return NAME_LESS; else return NAME_GREATER; @@ -689,7 +689,7 @@ static int tnc_prev(struct ubifs_info *c, struct ubifs_znode **zn, int *n) */ static int resolve_collision(struct ubifs_info *c, const union ubifs_key *key, struct ubifs_znode **zn, int *n, - const struct qstr *nm) + const struct fscrypt_name *nm) { int err; @@ -807,7 +807,7 @@ static int resolve_collision(struct ubifs_info *c, const union ubifs_key *key, */ static int fallible_matches_name(struct ubifs_info *c, struct ubifs_zbranch *zbr, - const struct qstr *nm) + const struct fscrypt_name *nm) { struct ubifs_dent_node *dent; int nlen, err; @@ -835,11 +835,11 @@ static int fallible_matches_name(struct ubifs_info *c, dent = zbr->leaf; nlen = le16_to_cpu(dent->nlen); - err = memcmp(dent->name, nm->name, min_t(int, nlen, nm->len)); + err = memcmp(dent->name, fname_name(nm), min_t(int, nlen, fname_len(nm))); if (err == 0) { - if (nlen == nm->len) + if (nlen == fname_len(nm)) return NAME_MATCHES; - else if (nlen < nm->len) + else if (nlen < fname_len(nm)) return NAME_LESS; else return NAME_GREATER; @@ -878,7 +878,8 @@ out_free: static int fallible_resolve_collision(struct ubifs_info *c, const union ubifs_key *key, struct ubifs_znode **zn, int *n, - const struct qstr *nm, int adding) + const struct fscrypt_name *nm, + int adding) { struct ubifs_znode *o_znode = NULL, *znode = *zn; int uninitialized_var(o_n), err, cmp, unsure = 0, nn = *n; @@ -1453,7 +1454,7 @@ again: * In this case the leaf node cache gets used, so we pass the * address of the zbranch and keep the mutex locked */ - err = tnc_read_node_nm(c, zt, node); + err = tnc_read_hashed_node(c, zt, node); goto out; } if (safely) { @@ -1782,19 +1783,19 @@ int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu) * @node: the node is returned here * @nm: node name * - * This function look up and reads a node which contains name hash in the key. + * This function looks up and reads a node which contains name hash in the key. * Since the hash may have collisions, there may be many nodes with the same * key, so we have to sequentially look to all of them until the needed one is * found. This function returns zero in case of success, %-ENOENT if the node * was not found, and a negative error code in case of failure. */ static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key, - void *node, const struct qstr *nm) + void *node, const struct fscrypt_name *nm) { int found, n, err; struct ubifs_znode *znode; - dbg_tnck(key, "name '%.*s' key ", nm->len, nm->name); + //dbg_tnck(key, "name '%.*s' key ", nm->len, nm->name); mutex_lock(&c->tnc_mutex); found = ubifs_lookup_level0(c, key, &znode, &n); if (!found) { @@ -1816,7 +1817,7 @@ static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key, goto out_unlock; } - err = tnc_read_node_nm(c, &znode->zbranch[n], node); + err = tnc_read_hashed_node(c, &znode->zbranch[n], node); out_unlock: mutex_unlock(&c->tnc_mutex); @@ -1830,14 +1831,14 @@ out_unlock: * @node: the node is returned here * @nm: node name * - * This function look up and reads a node which contains name hash in the key. + * This function looks up and reads a node which contains name hash in the key. * Since the hash may have collisions, there may be many nodes with the same * key, so we have to sequentially look to all of them until the needed one is * found. This function returns zero in case of success, %-ENOENT if the node * was not found, and a negative error code in case of failure. */ int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key, - void *node, const struct qstr *nm) + void *node, const struct fscrypt_name *nm) { int err, len; const struct ubifs_dent_node *dent = node; @@ -1851,16 +1852,105 @@ int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key, return err; len = le16_to_cpu(dent->nlen); - if (nm->len == len && !memcmp(dent->name, nm->name, len)) + if (fname_len(nm) == len && !memcmp(dent->name, fname_name(nm), len)) return 0; /* * Unluckily, there are hash collisions and we have to iterate over * them look at each direntry with colliding name hash sequentially. */ + return do_lookup_nm(c, key, node, nm); } +static int do_lookup_dh(struct ubifs_info *c, const union ubifs_key *key, + struct ubifs_dent_node *dent, uint32_t cookie) +{ + int n, err, type = key_type(c, key); + struct ubifs_znode *znode; + struct ubifs_zbranch *zbr; + union ubifs_key *dkey, start_key; + + ubifs_assert(is_hash_key(c, key)); + + lowest_dent_key(c, &start_key, key_inum(c, key)); + + mutex_lock(&c->tnc_mutex); + err = ubifs_lookup_level0(c, &start_key, &znode, &n); + if (unlikely(err < 0)) + goto out_unlock; + + for (;;) { + if (!err) { + err = tnc_next(c, &znode, &n); + if (err) + goto out_unlock; + } + + zbr = &znode->zbranch[n]; + dkey = &zbr->key; + + if (key_inum(c, dkey) != key_inum(c, key) || + key_type(c, dkey) != type) { + err = -ENOENT; + goto out_unlock; + } + + err = tnc_read_hashed_node(c, zbr, dent); + if (err) + goto out_unlock; + + if (key_hash(c, key) == key_hash(c, dkey) && + le32_to_cpu(dent->cookie) == cookie) + goto out_unlock; + } + +out_unlock: + mutex_unlock(&c->tnc_mutex); + return err; +} + +/** + * ubifs_tnc_lookup_dh - look up a "double hashed" node. + * @c: UBIFS file-system description object + * @key: node key to lookup + * @node: the node is returned here + * @cookie: node cookie for collision resolution + * + * This function looks up and reads a node which contains name hash in the key. + * Since the hash may have collisions, there may be many nodes with the same + * key, so we have to sequentially look to all of them until the needed one + * with the same cookie value is found. + * This function returns zero in case of success, %-ENOENT if the node + * was not found, and a negative error code in case of failure. + */ +int ubifs_tnc_lookup_dh(struct ubifs_info *c, const union ubifs_key *key, + void *node, uint32_t cookie) +{ + int err; + const struct ubifs_dent_node *dent = node; + + if (!c->double_hash) + return -EOPNOTSUPP; + + /* + * We assume that in most of the cases there are no name collisions and + * 'ubifs_tnc_lookup()' returns us the right direntry. + */ + err = ubifs_tnc_lookup(c, key, node); + if (err) + return err; + + if (le32_to_cpu(dent->cookie) == cookie) + return 0; + + /* + * Unluckily, there are hash collisions and we have to iterate over + * them look at each direntry with colliding name hash sequentially. + */ + return do_lookup_dh(c, key, node, cookie); +} + /** * correct_parent_keys - correct parent znodes' keys. * @c: UBIFS file-system description object @@ -2279,14 +2369,15 @@ out_unlock: * may have collisions, like directory entry keys. */ int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key, - int lnum, int offs, int len, const struct qstr *nm) + int lnum, int offs, int len, + const struct fscrypt_name *nm) { int found, n, err = 0; struct ubifs_znode *znode; mutex_lock(&c->tnc_mutex); - dbg_tnck(key, "LEB %d:%d, name '%.*s', key ", - lnum, offs, nm->len, nm->name); + //dbg_tnck(key, "LEB %d:%d, name '%.*s', key ", + // lnum, offs, nm->len, nm->name); found = lookup_level0_dirty(c, key, &znode, &n); if (found < 0) { err = found; @@ -2344,7 +2435,7 @@ int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key, * by passing 'ubifs_tnc_remove_nm()' the same key but * an unmatchable name. */ - struct qstr noname = { .name = "" }; + struct fscrypt_name noname = { .disk_name = { .name = "", .len = 1 } }; err = dbg_check_tnc(c, 0); mutex_unlock(&c->tnc_mutex); @@ -2514,13 +2605,13 @@ out_unlock: * Returns %0 on success or negative error code on failure. */ int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key, - const struct qstr *nm) + const struct fscrypt_name *nm) { int n, err; struct ubifs_znode *znode; mutex_lock(&c->tnc_mutex); - dbg_tnck(key, "%.*s, key ", nm->len, nm->name); + //dbg_tnck(key, "%.*s, key ", nm->len, nm->name); err = lookup_level0_dirty(c, key, &znode, &n); if (err < 0) goto out_unlock; @@ -2669,7 +2760,7 @@ int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum) { union ubifs_key key1, key2; struct ubifs_dent_node *xent, *pxent = NULL; - struct qstr nm = { .name = NULL }; + struct fscrypt_name nm = {0}; dbg_tnc("ino %lu", (unsigned long)inum); @@ -2694,8 +2785,8 @@ int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum) dbg_tnc("xent '%s', ino %lu", xent->name, (unsigned long)xattr_inum); - nm.name = xent->name; - nm.len = le16_to_cpu(xent->nlen); + fname_name(&nm) = xent->name; + fname_len(&nm) = le16_to_cpu(xent->nlen); err = ubifs_tnc_remove_nm(c, &key1, &nm); if (err) { kfree(xent); @@ -2747,7 +2838,7 @@ int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum) */ struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c, union ubifs_key *key, - const struct qstr *nm) + const struct fscrypt_name *nm) { int n, err, type = key_type(c, key); struct ubifs_znode *znode; @@ -2755,7 +2846,7 @@ struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c, struct ubifs_zbranch *zbr; union ubifs_key *dkey; - dbg_tnck(key, "%s ", nm->name ? (char *)nm->name : "(lowest)"); + //dbg_tnck(key, "%s ", nm->name ? (char *)nm->name : "(lowest)"); ubifs_assert(is_hash_key(c, key)); mutex_lock(&c->tnc_mutex); @@ -2763,7 +2854,7 @@ struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c, if (unlikely(err < 0)) goto out_unlock; - if (nm->name) { + if (fname_len(nm) > 0) { if (err) { /* Handle collisions */ err = resolve_collision(c, key, &znode, &n, nm); @@ -2813,7 +2904,7 @@ struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c, goto out_free; } - err = tnc_read_node_nm(c, zbr, dent); + err = tnc_read_hashed_node(c, zbr, dent); if (unlikely(err)) goto out_free; diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h index e24380cf46ed..e8c23c9d4f4a 100644 --- a/fs/ubifs/ubifs-media.h +++ b/fs/ubifs/ubifs-media.h @@ -46,7 +46,7 @@ * UBIFS went into mainline kernel with format version 4. The older formats * were development formats. */ -#define UBIFS_FORMAT_VERSION 4 +#define UBIFS_FORMAT_VERSION 5 /* * Read-only compatibility version. If the UBIFS format is changed, older UBIFS @@ -301,6 +301,13 @@ enum { #define UBIFS_MAX_NODE_SZ UBIFS_MAX_INO_NODE_SZ /* + * xattr name of UBIFS encryption context, we don't use a prefix + * nor a long name to not waste space on the flash. + */ +#define UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT "c" + + +/* * On-flash inode flags. * * UBIFS_COMPR_FL: use compression for this inode @@ -309,6 +316,7 @@ enum { * UBIFS_APPEND_FL: writes to the inode may only append data * UBIFS_DIRSYNC_FL: I/O on this directory inode has to be synchronous * UBIFS_XATTR_FL: this inode is the inode for an extended attribute value + * UBIFS_CRYPT_FL: use encryption for this inode * * Note, these are on-flash flags which correspond to ioctl flags * (@FS_COMPR_FL, etc). They have the same values now, but generally, do not @@ -321,6 +329,7 @@ enum { UBIFS_APPEND_FL = 0x08, UBIFS_DIRSYNC_FL = 0x10, UBIFS_XATTR_FL = 0x20, + UBIFS_CRYPT_FL = 0x40, }; /* Inode flag bits used by UBIFS */ @@ -409,12 +418,19 @@ enum { * * UBIFS_FLG_BIGLPT: if "big" LPT model is used if set * UBIFS_FLG_SPACE_FIXUP: first-mount "fixup" of free space within LEBs needed + * UBIFS_FLG_DOUBLE_HASH: store a 32bit cookie in directory entry nodes to + * support 64bit cookies for lookups by hash + * UBIFS_FLG_ENCRYPTION: this filesystem contains encrypted files */ enum { UBIFS_FLG_BIGLPT = 0x02, UBIFS_FLG_SPACE_FIXUP = 0x04, + UBIFS_FLG_DOUBLE_HASH = 0x08, + UBIFS_FLG_ENCRYPTION = 0x10, }; +#define UBIFS_FLG_MASK (UBIFS_FLG_BIGLPT|UBIFS_FLG_SPACE_FIXUP|UBIFS_FLG_DOUBLE_HASH|UBIFS_FLG_ENCRYPTION) + /** * struct ubifs_ch - common header node. * @magic: UBIFS node magic number (%UBIFS_NODE_MAGIC) @@ -521,7 +537,8 @@ struct ubifs_ino_node { * @padding1: reserved for future, zeroes * @type: type of the target inode (%UBIFS_ITYPE_REG, %UBIFS_ITYPE_DIR, etc) * @nlen: name length - * @padding2: reserved for future, zeroes + * @cookie: A 32bits random number, used to construct a 64bits + * identifier. * @name: zero-terminated name * * Note, do not forget to amend 'zero_dent_node_unused()' function when @@ -534,7 +551,7 @@ struct ubifs_dent_node { __u8 padding1; __u8 type; __le16 nlen; - __u8 padding2[4]; /* Watch 'zero_dent_node_unused()' if changing! */ + __le32 cookie; __u8 name[]; } __packed; @@ -544,18 +561,16 @@ struct ubifs_dent_node { * @key: node key * @size: uncompressed data size in bytes * @compr_type: compression type (%UBIFS_COMPR_NONE, %UBIFS_COMPR_LZO, etc) - * @padding: reserved for future, zeroes + * @compr_size: compressed data size in bytes, only valid when data is encrypted * @data: data * - * Note, do not forget to amend 'zero_data_node_unused()' function when - * changing the padding fields. */ struct ubifs_data_node { struct ubifs_ch ch; __u8 key[UBIFS_MAX_KEY_LEN]; __le32 size; __le16 compr_type; - __u8 padding[2]; /* Watch 'zero_data_node_unused()' if changing! */ + __le16 compr_size; __u8 data[]; } __packed; diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index 096035eb29d0..ca72382ce6cc 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -38,6 +38,8 @@ #include <linux/backing-dev.h> #include <linux/security.h> #include <linux/xattr.h> +#include <linux/fscrypto.h> +#include <linux/random.h> #include "ubifs-media.h" /* Version of this UBIFS implementation */ @@ -83,10 +85,6 @@ */ #define BGT_NAME_PATTERN "ubifs_bgt%d_%d" -/* Write-buffer synchronization timeout interval in seconds */ -#define WBUF_TIMEOUT_SOFTLIMIT 3 -#define WBUF_TIMEOUT_HARDLIMIT 5 - /* Maximum possible inode number (only 32-bit inodes are supported now) */ #define MAX_INUM 0xFFFFFFFF @@ -138,6 +136,12 @@ */ #define WORST_COMPR_FACTOR 2 +#ifdef CONFIG_UBIFS_FS_ENCRYPTION +#define UBIFS_CIPHER_BLOCK_SIZE FS_CRYPTO_BLOCK_SIZE +#else +#define UBIFS_CIPHER_BLOCK_SIZE 0 +#endif + /* * How much memory is needed for a buffer where we compress a data node. */ @@ -645,9 +649,6 @@ typedef int (*ubifs_lpt_scan_callback)(struct ubifs_info *c, * @io_mutex: serializes write-buffer I/O * @lock: serializes @buf, @lnum, @offs, @avail, @used, @next_ino and @inodes * fields - * @softlimit: soft write-buffer timeout interval - * @delta: hard and soft timeouts delta (the timer expire interval is @softlimit - * and @softlimit + @delta) * @timer: write-buffer timer * @no_timer: non-zero if this write-buffer does not have a timer * @need_sync: non-zero if the timer expired and the wbuf needs sync'ing @@ -676,8 +677,6 @@ struct ubifs_wbuf { int (*sync_callback)(struct ubifs_info *c, int lnum, int free, int pad); struct mutex io_mutex; spinlock_t lock; - ktime_t softlimit; - unsigned long long delta; struct hrtimer timer; unsigned int no_timer:1; unsigned int need_sync:1; @@ -1007,6 +1006,8 @@ struct ubifs_debug_info; * * @big_lpt: flag that LPT is too big to write whole during commit * @space_fixup: flag indicating that free space in LEBs needs to be cleaned up + * @double_hash: flag indicating that we can do lookups by hash + * @encrypted: flag indicating that this file system contains encrypted files * @no_chk_data_crc: do not check CRCs when reading data nodes (except during * recovery) * @bulk_read: enable bulk-reads @@ -1249,6 +1250,8 @@ struct ubifs_info { unsigned int big_lpt:1; unsigned int space_fixup:1; + unsigned int double_hash:1; + unsigned int encrypted:1; unsigned int no_chk_data_crc:1; unsigned int bulk_read:1; unsigned int default_compr:2; @@ -1515,25 +1518,29 @@ int ubifs_consolidate_log(struct ubifs_info *c); /* journal.c */ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir, - const struct qstr *nm, const struct inode *inode, + const struct fscrypt_name *nm, const struct inode *inode, int deletion, int xent); int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode, const union ubifs_key *key, const void *buf, int len); int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode); int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode); int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir, - const struct dentry *fst_dentry, + const struct inode *fst_inode, + const struct fscrypt_name *fst_nm, const struct inode *snd_dir, - const struct dentry *snd_dentry, int sync); + const struct inode *snd_inode, + const struct fscrypt_name *snd_nm, int sync); int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir, - const struct dentry *old_dentry, + const struct inode *old_inode, + const struct fscrypt_name *old_nm, const struct inode *new_dir, - const struct dentry *new_dentry, + const struct inode *new_inode, + const struct fscrypt_name *new_nm, const struct inode *whiteout, int sync); int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode, loff_t old_size, loff_t new_size); int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host, - const struct inode *inode, const struct qstr *nm); + const struct inode *inode, const struct fscrypt_name *nm); int ubifs_jnl_change_xattr(struct ubifs_info *c, const struct inode *inode1, const struct inode *inode2); @@ -1568,7 +1575,9 @@ int ubifs_save_dirty_idx_lnums(struct ubifs_info *c); int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key, struct ubifs_znode **zn, int *n); int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key, - void *node, const struct qstr *nm); + void *node, const struct fscrypt_name *nm); +int ubifs_tnc_lookup_dh(struct ubifs_info *c, const union ubifs_key *key, + void *node, uint32_t secondary_hash); int ubifs_tnc_locate(struct ubifs_info *c, const union ubifs_key *key, void *node, int *lnum, int *offs); int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum, @@ -1576,16 +1585,16 @@ int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum, int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key, int old_lnum, int old_offs, int lnum, int offs, int len); int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key, - int lnum, int offs, int len, const struct qstr *nm); + int lnum, int offs, int len, const struct fscrypt_name *nm); int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key); int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key, - const struct qstr *nm); + const struct fscrypt_name *nm); int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key, union ubifs_key *to_key); int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum); struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c, union ubifs_key *key, - const struct qstr *nm); + const struct fscrypt_name *nm); void ubifs_tnc_close(struct ubifs_info *c); int ubifs_tnc_has_node(struct ubifs_info *c, union ubifs_key *key, int level, int lnum, int offs, int is_idx); @@ -1642,6 +1651,7 @@ int ubifs_read_superblock(struct ubifs_info *c); struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c); int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup); int ubifs_fixup_free_space(struct ubifs_info *c); +int ubifs_enable_encryption(struct ubifs_info *c); /* replay.c */ int ubifs_validate_entry(struct ubifs_info *c, @@ -1733,16 +1743,21 @@ int ubifs_update_time(struct inode *inode, struct timespec *time, int flags); #endif /* dir.c */ -struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir, +struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir, umode_t mode); int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); +int ubifs_check_dir_empty(struct inode *dir); /* xattr.c */ extern const struct xattr_handler *ubifs_xattr_handlers[]; ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size); int ubifs_init_security(struct inode *dentry, struct inode *inode, const struct qstr *qstr); +int ubifs_xattr_set(struct inode *host, const char *name, const void *value, + size_t size, int flags); +ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf, + size_t size); /* super.c */ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum); @@ -1781,6 +1796,66 @@ int ubifs_decompress(const struct ubifs_info *c, const void *buf, int len, #include "misc.h" #include "key.h" +#ifndef CONFIG_UBIFS_FS_ENCRYPTION +#define fscrypt_set_d_op(i) +#define fscrypt_get_ctx fscrypt_notsupp_get_ctx +#define fscrypt_release_ctx fscrypt_notsupp_release_ctx +#define fscrypt_encrypt_page fscrypt_notsupp_encrypt_page +#define fscrypt_decrypt_page fscrypt_notsupp_decrypt_page +#define fscrypt_decrypt_bio_pages fscrypt_notsupp_decrypt_bio_pages +#define fscrypt_pullback_bio_page fscrypt_notsupp_pullback_bio_page +#define fscrypt_restore_control_page fscrypt_notsupp_restore_control_page +#define fscrypt_zeroout_range fscrypt_notsupp_zeroout_range +#define fscrypt_ioctl_set_policy fscrypt_notsupp_ioctl_set_policy +#define fscrypt_ioctl_get_policy fscrypt_notsupp_ioctl_get_policy +#define fscrypt_has_permitted_context fscrypt_notsupp_has_permitted_context +#define fscrypt_inherit_context fscrypt_notsupp_inherit_context +#define fscrypt_get_encryption_info fscrypt_notsupp_get_encryption_info +#define fscrypt_put_encryption_info fscrypt_notsupp_put_encryption_info +#define fscrypt_setup_filename fscrypt_notsupp_setup_filename +#define fscrypt_free_filename fscrypt_notsupp_free_filename +#define fscrypt_fname_encrypted_size fscrypt_notsupp_fname_encrypted_size +#define fscrypt_fname_alloc_buffer fscrypt_notsupp_fname_alloc_buffer +#define fscrypt_fname_free_buffer fscrypt_notsupp_fname_free_buffer +#define fscrypt_fname_disk_to_usr fscrypt_notsupp_fname_disk_to_usr +#define fscrypt_fname_usr_to_disk fscrypt_notsupp_fname_usr_to_disk +static inline int ubifs_encrypt(const struct inode *inode, + struct ubifs_data_node *dn, + unsigned int in_len, unsigned int *out_len, + int block) +{ + ubifs_assert(0); + return -EOPNOTSUPP; +} +static inline int ubifs_decrypt(const struct inode *inode, + struct ubifs_data_node *dn, + unsigned int *out_len, int block) +{ + ubifs_assert(0); + return -EOPNOTSUPP; +} +#else +/* crypto.c */ +int ubifs_encrypt(const struct inode *inode, struct ubifs_data_node *dn, + unsigned int in_len, unsigned int *out_len, int block); +int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn, + unsigned int *out_len, int block); +#endif + +extern struct fscrypt_operations ubifs_crypt_operations; + +static inline bool __ubifs_crypt_is_encrypted(struct inode *inode) +{ + struct ubifs_inode *ui = ubifs_inode(inode); + + return ui->flags & UBIFS_CRYPT_FL; +} + +static inline bool ubifs_crypt_is_encrypted(const struct inode *inode) +{ + return __ubifs_crypt_is_encrypted((struct inode *)inode); +} + /* Normal UBIFS messages */ __printf(2, 3) void ubifs_msg(const struct ubifs_info *c, const char *fmt, ...); diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c index d9f9615bfd71..efe00fcb8b75 100644 --- a/fs/ubifs/xattr.c +++ b/fs/ubifs/xattr.c @@ -97,7 +97,7 @@ static const struct file_operations empty_fops; * of failure. */ static int create_xattr(struct ubifs_info *c, struct inode *host, - const struct qstr *nm, const void *value, int size) + const struct fscrypt_name *nm, const void *value, int size) { int err, names_len; struct inode *inode; @@ -117,7 +117,7 @@ static int create_xattr(struct ubifs_info *c, struct inode *host, * extended attributes if the name list becomes larger. This limitation * is artificial for UBIFS, though. */ - names_len = host_ui->xattr_names + host_ui->xattr_cnt + nm->len + 1; + names_len = host_ui->xattr_names + host_ui->xattr_cnt + fname_len(nm) + 1; if (names_len > XATTR_LIST_MAX) { ubifs_err(c, "cannot add one more xattr name to inode %lu, total names length would become %d, max. is %d", host->i_ino, names_len, XATTR_LIST_MAX); @@ -154,9 +154,18 @@ static int create_xattr(struct ubifs_info *c, struct inode *host, mutex_lock(&host_ui->ui_mutex); host->i_ctime = ubifs_current_time(host); host_ui->xattr_cnt += 1; - host_ui->xattr_size += CALC_DENT_SIZE(nm->len); + host_ui->xattr_size += CALC_DENT_SIZE(fname_len(nm)); host_ui->xattr_size += CALC_XATTR_BYTES(size); - host_ui->xattr_names += nm->len; + host_ui->xattr_names += fname_len(nm); + + /* + * We handle UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT here because we + * have to set the UBIFS_CRYPT_FL flag on the host inode. + * To avoid multiple updates of the same inode in the same operation, + * let's do it here. + */ + if (strcmp(fname_name(nm), UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT) == 0) + host_ui->flags |= UBIFS_CRYPT_FL; err = ubifs_jnl_update(c, host, nm, inode, 0, 1); if (err) @@ -170,9 +179,10 @@ static int create_xattr(struct ubifs_info *c, struct inode *host, out_cancel: host_ui->xattr_cnt -= 1; - host_ui->xattr_size -= CALC_DENT_SIZE(nm->len); + host_ui->xattr_size -= CALC_DENT_SIZE(fname_len(nm)); host_ui->xattr_size -= CALC_XATTR_BYTES(size); - host_ui->xattr_names -= nm->len; + host_ui->xattr_names -= fname_len(nm); + host_ui->flags &= ~UBIFS_CRYPT_FL; mutex_unlock(&host_ui->ui_mutex); out_free: make_bad_inode(inode); @@ -269,22 +279,28 @@ static struct inode *iget_xattr(struct ubifs_info *c, ino_t inum) return ERR_PTR(-EINVAL); } -static int __ubifs_setxattr(struct inode *host, const char *name, - const void *value, size_t size, int flags) +int ubifs_xattr_set(struct inode *host, const char *name, const void *value, + size_t size, int flags) { struct inode *inode; struct ubifs_info *c = host->i_sb->s_fs_info; - struct qstr nm = QSTR_INIT(name, strlen(name)); + struct fscrypt_name nm = { .disk_name = FSTR_INIT((char *)name, strlen(name))}; struct ubifs_dent_node *xent; union ubifs_key key; int err; - ubifs_assert(inode_is_locked(host)); + /* + * Creating an encryption context is done unlocked since we + * operate on a new inode which is not visible to other users + * at this point. + */ + if (strcmp(name, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT) != 0) + ubifs_assert(inode_is_locked(host)); if (size > UBIFS_MAX_INO_DATA) return -ERANGE; - if (nm.len > UBIFS_MAX_NLEN) + if (fname_len(&nm) > UBIFS_MAX_NLEN) return -ENAMETOOLONG; xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS); @@ -329,18 +345,18 @@ out_free: return err; } -static ssize_t __ubifs_getxattr(struct inode *host, const char *name, - void *buf, size_t size) +ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf, + size_t size) { struct inode *inode; struct ubifs_info *c = host->i_sb->s_fs_info; - struct qstr nm = QSTR_INIT(name, strlen(name)); + struct fscrypt_name nm = { .disk_name = FSTR_INIT((char *)name, strlen(name))}; struct ubifs_inode *ui; struct ubifs_dent_node *xent; union ubifs_key key; int err; - if (nm.len > UBIFS_MAX_NLEN) + if (fname_len(&nm) > UBIFS_MAX_NLEN) return -ENAMETOOLONG; xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS); @@ -387,6 +403,20 @@ out_unlock: return err; } +static bool xattr_visible(const char *name) +{ + /* File encryption related xattrs are for internal use only */ + if (strcmp(name, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT) == 0) + return false; + + /* Show trusted namespace only for "power" users */ + if (strncmp(name, XATTR_TRUSTED_PREFIX, + XATTR_TRUSTED_PREFIX_LEN) == 0 && !capable(CAP_SYS_ADMIN)) + return false; + + return true; +} + ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size) { union ubifs_key key; @@ -395,7 +425,7 @@ ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size) struct ubifs_inode *host_ui = ubifs_inode(host); struct ubifs_dent_node *xent, *pxent = NULL; int err, len, written = 0; - struct qstr nm = { .name = NULL }; + struct fscrypt_name nm = {0}; dbg_gen("ino %lu ('%pd'), buffer size %zd", host->i_ino, dentry, size); @@ -419,15 +449,12 @@ ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size) break; } - nm.name = xent->name; - nm.len = le16_to_cpu(xent->nlen); + fname_name(&nm) = xent->name; + fname_len(&nm) = le16_to_cpu(xent->nlen); - /* Show trusted namespace only for "power" users */ - if (strncmp(xent->name, XATTR_TRUSTED_PREFIX, - XATTR_TRUSTED_PREFIX_LEN) || - capable(CAP_SYS_ADMIN)) { - memcpy(buffer + written, nm.name, nm.len + 1); - written += nm.len + 1; + if (xattr_visible(xent->name)) { + memcpy(buffer + written, fname_name(&nm), fname_len(&nm) + 1); + written += fname_len(&nm) + 1; } kfree(pxent); @@ -446,7 +473,7 @@ ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size) } static int remove_xattr(struct ubifs_info *c, struct inode *host, - struct inode *inode, const struct qstr *nm) + struct inode *inode, const struct fscrypt_name *nm) { int err; struct ubifs_inode *host_ui = ubifs_inode(host); @@ -463,9 +490,9 @@ static int remove_xattr(struct ubifs_info *c, struct inode *host, mutex_lock(&host_ui->ui_mutex); host->i_ctime = ubifs_current_time(host); host_ui->xattr_cnt -= 1; - host_ui->xattr_size -= CALC_DENT_SIZE(nm->len); + host_ui->xattr_size -= CALC_DENT_SIZE(fname_len(nm)); host_ui->xattr_size -= CALC_XATTR_BYTES(ui->data_len); - host_ui->xattr_names -= nm->len; + host_ui->xattr_names -= fname_len(nm); err = ubifs_jnl_delete_xattr(c, host, inode, nm); if (err) @@ -477,27 +504,27 @@ static int remove_xattr(struct ubifs_info *c, struct inode *host, out_cancel: host_ui->xattr_cnt += 1; - host_ui->xattr_size += CALC_DENT_SIZE(nm->len); + host_ui->xattr_size += CALC_DENT_SIZE(fname_len(nm)); host_ui->xattr_size += CALC_XATTR_BYTES(ui->data_len); - host_ui->xattr_names += nm->len; + host_ui->xattr_names += fname_len(nm); mutex_unlock(&host_ui->ui_mutex); ubifs_release_budget(c, &req); make_bad_inode(inode); return err; } -static int __ubifs_removexattr(struct inode *host, const char *name) +static int ubifs_xattr_remove(struct inode *host, const char *name) { struct inode *inode; struct ubifs_info *c = host->i_sb->s_fs_info; - struct qstr nm = QSTR_INIT(name, strlen(name)); + struct fscrypt_name nm = { .disk_name = FSTR_INIT((char *)name, strlen(name))}; struct ubifs_dent_node *xent; union ubifs_key key; int err; ubifs_assert(inode_is_locked(host)); - if (nm.len > UBIFS_MAX_NLEN) + if (fname_len(&nm) > UBIFS_MAX_NLEN) return -ENAMETOOLONG; xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS); @@ -548,7 +575,8 @@ static int init_xattrs(struct inode *inode, const struct xattr *xattr_array, } strcpy(name, XATTR_SECURITY_PREFIX); strcpy(name + XATTR_SECURITY_PREFIX_LEN, xattr->name); - err = __ubifs_setxattr(inode, name, xattr->value, xattr->value_len, 0); + err = ubifs_xattr_set(inode, name, xattr->value, + xattr->value_len, 0); kfree(name); if (err < 0) break; @@ -572,7 +600,7 @@ int ubifs_init_security(struct inode *dentry, struct inode *inode, return err; } -static int ubifs_xattr_get(const struct xattr_handler *handler, +static int xattr_get(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size) { @@ -580,10 +608,10 @@ static int ubifs_xattr_get(const struct xattr_handler *handler, inode->i_ino, dentry, size); name = xattr_full_name(handler, name); - return __ubifs_getxattr(inode, name, buffer, size); + return ubifs_xattr_get(inode, name, buffer, size); } -static int ubifs_xattr_set(const struct xattr_handler *handler, +static int xattr_set(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -594,27 +622,27 @@ static int ubifs_xattr_set(const struct xattr_handler *handler, name = xattr_full_name(handler, name); if (value) - return __ubifs_setxattr(inode, name, value, size, flags); + return ubifs_xattr_set(inode, name, value, size, flags); else - return __ubifs_removexattr(inode, name); + return ubifs_xattr_remove(inode, name); } static const struct xattr_handler ubifs_user_xattr_handler = { .prefix = XATTR_USER_PREFIX, - .get = ubifs_xattr_get, - .set = ubifs_xattr_set, + .get = xattr_get, + .set = xattr_set, }; static const struct xattr_handler ubifs_trusted_xattr_handler = { .prefix = XATTR_TRUSTED_PREFIX, - .get = ubifs_xattr_get, - .set = ubifs_xattr_set, + .get = xattr_get, + .set = xattr_set, }; static const struct xattr_handler ubifs_security_xattr_handler = { .prefix = XATTR_SECURITY_PREFIX, - .get = ubifs_xattr_get, - .set = ubifs_xattr_set, + .get = xattr_get, + .set = xattr_set, }; const struct xattr_handler *ubifs_xattr_handlers[] = { |