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Diffstat (limited to 'fs/ubifs/journal.c')
-rw-r--r--fs/ubifs/journal.c224
1 files changed, 128 insertions, 96 deletions
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-25 20:45:23 +0300