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ubifs: Implement encrypted filenames

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Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: David Gstir <david@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2016-11-11 22:50:29 +01:00
parent b9bc8c7bdb
commit f4f61d2cc6
8 changed files with 414 additions and 197 deletions
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14
fs/ubifs/debug.c
View File

@ -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);

323
fs/ubifs/dir.c
View File

@ -196,13 +196,13 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
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;
}
@ -215,6 +215,7 @@ 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);
@ -233,27 +234,42 @@ static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
return ERR_PTR(err);
}
if (dentry->d_name.len > UBIFS_MAX_NLEN)
return ERR_PTR(-ENAMETOOLONG);
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(c, &key, dent);
} 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));
@ -266,11 +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.
@ -278,8 +295,10 @@ static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
d_add(dentry, inode);
return NULL;
out:
out_dent:
kfree(dent);
out_fname:
fscrypt_free_filename(&nm);
return ERR_PTR(err);
}
@ -288,10 +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
@ -305,10 +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);
@ -319,12 +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;
@ -336,6 +363,8 @@ static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
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);
@ -351,6 +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,
@ -360,13 +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;
}
@ -402,7 +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);
@ -421,6 +468,7 @@ static int do_tmpfile(struct inode *dir, struct dentry *dentry,
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;
}
@ -480,12 +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, 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);
@ -496,6 +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
@ -517,12 +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);
@ -540,7 +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);
@ -557,15 +622,30 @@ 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), 0, &nm.disk_name, &fstr);
if (err < 0)
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);
@ -582,6 +662,9 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx)
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
@ -642,6 +725,7 @@ 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,
@ -654,17 +738,29 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
ubifs_assert(inode_is_locked(dir));
ubifs_assert(inode_is_locked(inode));
if (ubifs_crypt_is_encrypted(dir) &&
!fscrypt_has_permitted_context(dir, inode))
return -EPERM;
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)
return 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);
@ -673,13 +769,14 @@ 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:
@ -689,6 +786,8 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
unlock_2_inodes(dir, inode);
ubifs_release_budget(c, &req);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
return err;
}
@ -697,10 +796,10 @@ 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
@ -712,16 +811,29 @@ 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;
}
@ -731,7 +843,7 @@ 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);
@ -743,6 +855,7 @@ 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:
@ -752,6 +865,8 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
out_fname:
fscrypt_free_filename(&nm);
return err;
}
@ -766,7 +881,7 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
int ubifs_check_dir_empty(struct inode *dir)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct qstr nm = { .name = NULL };
struct fscrypt_name nm = { 0 };
struct ubifs_dent_node *dent;
union ubifs_key key;
int err;
@ -788,10 +903,10 @@ 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
@ -807,10 +922,22 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *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;
}
@ -821,7 +948,7 @@ 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);
@ -833,6 +960,7 @@ 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:
@ -843,6 +971,8 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
out_fname:
fscrypt_free_filename(&nm);
return err;
}
@ -851,8 +981,9 @@ 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
@ -866,10 +997,27 @@ 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);
@ -883,7 +1031,7 @@ 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;
@ -892,6 +1040,7 @@ 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:
@ -902,6 +1051,8 @@ static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
out_inode:
make_bad_inode(inode);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
out_budg:
ubifs_release_budget(c, &req);
return err;
@ -915,11 +1066,12 @@ 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
@ -941,11 +1093,28 @@ 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);
@ -962,7 +1131,7 @@ 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);
@ -970,6 +1139,7 @@ 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:
@ -979,6 +1149,8 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
out_inode:
make_bad_inode(inode);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
out_budg:
ubifs_release_budget(c, &req);
return err;
@ -1123,15 +1295,14 @@ 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;
@ -1164,11 +1335,29 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
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;
}
@ -1290,8 +1479,8 @@ 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;
@ -1307,6 +1496,9 @@ 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:
@ -1335,6 +1527,8 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
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;
}
@ -1349,6 +1543,7 @@ 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);
@ -1359,6 +1554,16 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
!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);
@ -1378,12 +1583,14 @@ 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;
}

123
fs/ubifs/journal.c
View File

@ -530,7 +530,7 @@ 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;
@ -542,11 +542,11 @@ 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;
/*
@ -587,9 +587,10 @@ 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';
zero_dent_node_unused(dent);
ubifs_prep_grp_node(c, dent, dlen, 0);
@ -914,9 +915,11 @@ 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
@ -925,29 +928,29 @@ 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);
@ -966,24 +969,24 @@ 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);
@ -1007,14 +1010,14 @@ 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;
@ -1066,31 +1069,31 @@ int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir,
* 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));
@ -1116,19 +1119,18 @@ 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';
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);
@ -1138,9 +1140,9 @@ 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';
zero_dent_node_unused(dent2);
ubifs_prep_grp_node(c, dent2, dlen2, 0);
@ -1181,15 +1183,15 @@ 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;
@ -1199,8 +1201,8 @@ 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;
}
@ -1461,7 +1463,8 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
* 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;
@ -1470,9 +1473,9 @@ 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));
@ -1480,7 +1483,7 @@ 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);
@ -1501,9 +1504,9 @@ 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);

19
fs/ubifs/key.h
View File

@ -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);

8
fs/ubifs/replay.c
View File

@ -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;

54
fs/ubifs/tnc.c
View File

@ -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 @@ static int fallible_matches_name(struct ubifs_info *c,
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;
@ -1789,12 +1790,12 @@ int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu)
* 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) {
@ -1837,7 +1838,7 @@ static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
* 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;
@ -1851,7 +1852,7 @@ 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;
/*
@ -2279,14 +2280,15 @@ int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key,
* 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 +2346,7 @@ 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 +2516,13 @@ int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key)
* 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 +2671,7 @@ 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 +2696,8 @@ 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 +2749,7 @@ 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 +2757,7 @@ 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 +2765,7 @@ 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);

24
fs/ubifs/ubifs.h
View File

@ -1513,25 +1513,29 @@ 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);
@ -1566,7 +1570,7 @@ 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_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,
@ -1574,16 +1578,16 @@ 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);

46
fs/ubifs/xattr.c
View File

@ -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 +154,9 @@ 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
@ -164,7 +164,7 @@ static int create_xattr(struct ubifs_info *c, struct inode *host,
* To avoid multiple updates of the same inode in the same operation,
* let's do it here.
*/
if (strcmp(nm->name, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT) == 0)
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);
@ -179,9 +179,9 @@ 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:
@ -284,7 +284,7 @@ int ubifs_xattr_set(struct inode *host, const char *name, const void *value,
{
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;
@ -300,7 +300,7 @@ int ubifs_xattr_set(struct inode *host, const char *name, const void *value,
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);
@ -350,13 +350,13 @@ ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf,
{
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);
@ -425,7 +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);
@ -449,12 +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);
if (xattr_visible(xent->name)) {
memcpy(buffer + written, nm.name, nm.len + 1);
written += nm.len + 1;
memcpy(buffer + written, fname_name(&nm), fname_len(&nm) + 1);
written += fname_len(&nm) + 1;
}
kfree(pxent);
@ -473,7 +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);
@ -490,9 +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)
@ -504,9 +504,9 @@ 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);
@ -517,14 +517,14 @@ 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);