ubifs: Implement encrypted filenames
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>
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index da59ea3..efe00fc 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 +154,9 @@ 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);