#include <linux/fs.h>
#include <linux/pagemap.h>
-#include <linux/jbd2.h>
#include <linux/time.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
struct dx_hash_info *hinfo,
struct dx_frame *frame);
static void dx_release(struct dx_frame *frames);
-static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize,
- struct dx_hash_info *hinfo, struct dx_map_entry map[]);
+static int dx_make_map(struct inode *dir, struct ext4_dir_entry_2 *de,
+ unsigned blocksize, struct dx_hash_info *hinfo,
+ struct dx_map_entry map[]);
static void dx_sort_map(struct dx_map_entry *map, unsigned count);
static struct ext4_dir_entry_2 *dx_move_dirents(char *from, char *to,
struct dx_map_entry *offsets, int count, unsigned blocksize);
unsigned bcount;
};
-static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext4_dir_entry_2 *de,
- int size, int show_names)
+static struct stats dx_show_leaf(struct inode *dir,
+ struct dx_hash_info *hinfo,
+ struct ext4_dir_entry_2 *de,
+ int size, int show_names)
{
unsigned names = 0, space = 0;
char *base = (char *) de;
{
if (show_names)
{
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ int len;
+ char *name;
+ struct ext4_str fname_crypto_str
+ = {.name = NULL, .len = 0};
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ int res;
+
+ name = de->name;
+ len = de->name_len;
+ ctx = ext4_get_fname_crypto_ctx(dir,
+ EXT4_NAME_LEN);
+ if (IS_ERR(ctx)) {
+ printk(KERN_WARNING "Error acquiring"
+ " crypto ctxt--skipping crypto\n");
+ ctx = NULL;
+ }
+ if (ctx == NULL) {
+ /* Directory is not encrypted */
+ ext4fs_dirhash(de->name,
+ de->name_len, &h);
+ printk("%*.s:(U)%x.%u ", len,
+ name, h.hash,
+ (unsigned) ((char *) de
+ - base));
+ } else {
+ /* Directory is encrypted */
+ res = ext4_fname_crypto_alloc_buffer(
+ ctx, de->name_len,
+ &fname_crypto_str);
+ if (res < 0) {
+ printk(KERN_WARNING "Error "
+ "allocating crypto "
+ "buffer--skipping "
+ "crypto\n");
+ ext4_put_fname_crypto_ctx(&ctx);
+ ctx = NULL;
+ }
+ res = ext4_fname_disk_to_usr(ctx, NULL, de,
+ &fname_crypto_str);
+ if (res < 0) {
+ printk(KERN_WARNING "Error "
+ "converting filename "
+ "from disk to usr"
+ "\n");
+ name = "??";
+ len = 2;
+ } else {
+ name = fname_crypto_str.name;
+ len = fname_crypto_str.len;
+ }
+ ext4fs_dirhash(de->name, de->name_len,
+ &h);
+ printk("%*.s:(E)%x.%u ", len, name,
+ h.hash, (unsigned) ((char *) de
+ - base));
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_fname_crypto_free_buffer(
+ &fname_crypto_str);
+ }
+#else
int len = de->name_len;
char *name = de->name;
- while (len--) printk("%c", *name++);
ext4fs_dirhash(de->name, de->name_len, &h);
- printk(":%x.%u ", h.hash,
+ printk("%*.s:%x.%u ", len, name, h.hash,
(unsigned) ((char *) de - base));
+#endif
}
space += EXT4_DIR_REC_LEN(de->name_len);
names++;
unsigned count = dx_get_count(entries), names = 0, space = 0, i;
unsigned bcount = 0;
struct buffer_head *bh;
- int err;
printk("%i indexed blocks...\n", count);
for (i = 0; i < count; i++, entries++)
{
continue;
stats = levels?
dx_show_entries(hinfo, dir, ((struct dx_node *) bh->b_data)->entries, levels - 1):
- dx_show_leaf(hinfo, (struct ext4_dir_entry_2 *) bh->b_data, blocksize, 0);
+ dx_show_leaf(dir, hinfo, (struct ext4_dir_entry_2 *)
+ bh->b_data, blocksize, 0);
names += stats.names;
space += stats.space;
bcount += stats.bcount;
if (hinfo->hash_version <= DX_HASH_TEA)
hinfo->hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
hinfo->seed = EXT4_SB(dir->i_sb)->s_hash_seed;
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ if (d_name) {
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ int res;
+
+ /* Check if the directory is encrypted */
+ ctx = ext4_get_fname_crypto_ctx(dir, EXT4_NAME_LEN);
+ if (IS_ERR(ctx)) {
+ ret_err = ERR_PTR(PTR_ERR(ctx));
+ goto fail;
+ }
+ res = ext4_fname_usr_to_hash(ctx, d_name, hinfo);
+ if (res < 0) {
+ ret_err = ERR_PTR(res);
+ goto fail;
+ }
+ ext4_put_fname_crypto_ctx(&ctx);
+ }
+#else
if (d_name)
ext4fs_dirhash(d_name->name, d_name->len, hinfo);
+#endif
hash = hinfo->hash;
if (root->info.unused_flags & 1) {
brelse(frame->bh);
frame--;
}
+
if (ret_err == ERR_PTR(ERR_BAD_DX_DIR))
ext4_warning(dir->i_sb,
"Corrupt dir inode %lu, running e2fsck is "
struct buffer_head *bh;
struct ext4_dir_entry_2 *de, *top;
int err = 0, count = 0;
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ struct ext4_str fname_crypto_str = {.name = NULL, .len = 0}, tmp_str;
dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
(unsigned long)block));
top = (struct ext4_dir_entry_2 *) ((char *) de +
dir->i_sb->s_blocksize -
EXT4_DIR_REC_LEN(0));
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ /* Check if the directory is encrypted */
+ ctx = ext4_get_fname_crypto_ctx(dir, EXT4_NAME_LEN);
+ if (IS_ERR(ctx)) {
+ err = PTR_ERR(ctx);
+ brelse(bh);
+ return err;
+ }
+ if (ctx != NULL) {
+ err = ext4_fname_crypto_alloc_buffer(ctx, EXT4_NAME_LEN,
+ &fname_crypto_str);
+ if (err < 0) {
+ ext4_put_fname_crypto_ctx(&ctx);
+ brelse(bh);
+ return err;
+ }
+ }
+#endif
for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) {
if (ext4_check_dir_entry(dir, NULL, de, bh,
bh->b_data, bh->b_size,
continue;
if (de->inode == 0)
continue;
- if ((err = ext4_htree_store_dirent(dir_file,
- hinfo->hash, hinfo->minor_hash, de)) != 0) {
- brelse(bh);
- return err;
+ if (ctx == NULL) {
+ /* Directory is not encrypted */
+ tmp_str.name = de->name;
+ tmp_str.len = de->name_len;
+ err = ext4_htree_store_dirent(dir_file,
+ hinfo->hash, hinfo->minor_hash, de,
+ &tmp_str);
+ } else {
+ /* Directory is encrypted */
+ err = ext4_fname_disk_to_usr(ctx, hinfo, de,
+ &fname_crypto_str);
+ if (err < 0) {
+ count = err;
+ goto errout;
+ }
+ err = ext4_htree_store_dirent(dir_file,
+ hinfo->hash, hinfo->minor_hash, de,
+ &fname_crypto_str);
+ }
+ if (err != 0) {
+ count = err;
+ goto errout;
}
count++;
}
+errout:
brelse(bh);
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_fname_crypto_free_buffer(&fname_crypto_str);
+#endif
return count;
}
int count = 0;
int ret, err;
__u32 hashval;
+ struct ext4_str tmp_str;
dxtrace(printk(KERN_DEBUG "In htree_fill_tree, start hash: %x:%x\n",
start_hash, start_minor_hash));
/* Add '.' and '..' from the htree header */
if (!start_hash && !start_minor_hash) {
de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
- if ((err = ext4_htree_store_dirent(dir_file, 0, 0, de)) != 0)
+ tmp_str.name = de->name;
+ tmp_str.len = de->name_len;
+ err = ext4_htree_store_dirent(dir_file, 0, 0,
+ de, &tmp_str);
+ if (err != 0)
goto errout;
count++;
}
if (start_hash < 2 || (start_hash ==2 && start_minor_hash==0)) {
de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
de = ext4_next_entry(de, dir->i_sb->s_blocksize);
- if ((err = ext4_htree_store_dirent(dir_file, 2, 0, de)) != 0)
+ tmp_str.name = de->name;
+ tmp_str.len = de->name_len;
+ err = ext4_htree_store_dirent(dir_file, 2, 0,
+ de, &tmp_str);
+ if (err != 0)
goto errout;
count++;
}
* Create map of hash values, offsets, and sizes, stored at end of block.
* Returns number of entries mapped.
*/
-static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize,
- struct dx_hash_info *hinfo,
+static int dx_make_map(struct inode *dir, struct ext4_dir_entry_2 *de,
+ unsigned blocksize, struct dx_hash_info *hinfo,
struct dx_map_entry *map_tail)
{
int count = 0;
* `len <= EXT4_NAME_LEN' is guaranteed by caller.
* `de != NULL' is guaranteed by caller.
*/
-static inline int ext4_match (int len, const char * const name,
- struct ext4_dir_entry_2 * de)
+static inline int ext4_match(struct ext4_fname_crypto_ctx *ctx,
+ struct ext4_str *fname_crypto_str,
+ int len, const char * const name,
+ struct ext4_dir_entry_2 *de)
{
- if (len != de->name_len)
- return 0;
+ int res;
+
if (!de->inode)
return 0;
- return !memcmp(name, de->name, len);
+
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ if (ctx)
+ return ext4_fname_match(ctx, fname_crypto_str, len, name, de);
+#endif
+ if (len != de->name_len)
+ return 0;
+ res = memcmp(name, de->name, len);
+ return (res == 0) ? 1 : 0;
}
/*
* Returns 0 if not found, -1 on failure, and 1 on success
*/
-int search_dir(struct buffer_head *bh,
- char *search_buf,
- int buf_size,
- struct inode *dir,
- const struct qstr *d_name,
- unsigned int offset,
- struct ext4_dir_entry_2 **res_dir)
+int search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
+ struct inode *dir, const struct qstr *d_name,
+ unsigned int offset, struct ext4_dir_entry_2 **res_dir)
{
struct ext4_dir_entry_2 * de;
char * dlimit;
int de_len;
const char *name = d_name->name;
int namelen = d_name->len;
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ struct ext4_str fname_crypto_str = {.name = NULL, .len = 0};
+ int res;
+
+ ctx = ext4_get_fname_crypto_ctx(dir, EXT4_NAME_LEN);
+ if (IS_ERR(ctx))
+ return -1;
de = (struct ext4_dir_entry_2 *)search_buf;
dlimit = search_buf + buf_size;
while ((char *) de < dlimit) {
/* this code is executed quadratically often */
/* do minimal checking `by hand' */
+ if ((char *) de + de->name_len <= dlimit) {
+ res = ext4_match(ctx, &fname_crypto_str, namelen,
+ name, de);
+ if (res < 0) {
+ res = -1;
+ goto return_result;
+ }
+ if (res > 0) {
+ /* found a match - just to be sure, do
+ * a full check */
+ if (ext4_check_dir_entry(dir, NULL, de, bh,
+ bh->b_data,
+ bh->b_size, offset)) {
+ res = -1;
+ goto return_result;
+ }
+ *res_dir = de;
+ res = 1;
+ goto return_result;
+ }
- if ((char *) de + namelen <= dlimit &&
- ext4_match (namelen, name, de)) {
- /* found a match - just to be sure, do a full check */
- if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data,
- bh->b_size, offset))
- return -1;
- *res_dir = de;
- return 1;
}
/* prevent looping on a bad block */
de_len = ext4_rec_len_from_disk(de->rec_len,
dir->i_sb->s_blocksize);
- if (de_len <= 0)
- return -1;
+ if (de_len <= 0) {
+ res = -1;
+ goto return_result;
+ }
offset += de_len;
de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
}
- return 0;
+
+ res = 0;
+return_result:
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_fname_crypto_free_buffer(&fname_crypto_str);
+ return res;
}
static int is_dx_internal_node(struct inode *dir, ext4_lblk_t block,
ext4_lblk_t block;
int retval;
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ *res_dir = NULL;
+#endif
frame = dx_probe(d_name, dir, &hinfo, frames);
if (IS_ERR(frame))
return (struct buffer_head *) frame;
ino);
return ERR_PTR(-EIO);
}
+ if (!IS_ERR(inode) && ext4_encrypted_inode(dir) &&
+ (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)) &&
+ !ext4_is_child_context_consistent_with_parent(dir,
+ inode)) {
+ iput(inode);
+ ext4_warning(inode->i_sb,
+ "Inconsistent encryption contexts: %lu/%lu\n",
+ (unsigned long) dir->i_ino,
+ (unsigned long) inode->i_ino);
+ return ERR_PTR(-EPERM);
+ }
}
return d_splice_alias(inode, dentry);
}
struct ext4_dir_entry_2 * de;
struct buffer_head *bh;
- bh = ext4_find_entry(child->d_inode, &dotdot, &de, NULL);
+ bh = ext4_find_entry(d_inode(child), &dotdot, &de, NULL);
if (IS_ERR(bh))
return (struct dentry *) bh;
if (!bh)
ino = le32_to_cpu(de->inode);
brelse(bh);
- if (!ext4_valid_inum(child->d_inode->i_sb, ino)) {
- EXT4_ERROR_INODE(child->d_inode,
+ if (!ext4_valid_inum(d_inode(child)->i_sb, ino)) {
+ EXT4_ERROR_INODE(d_inode(child),
"bad parent inode number: %u", ino);
return ERR_PTR(-EIO);
}
- return d_obtain_alias(ext4_iget_normal(child->d_inode->i_sb, ino));
+ return d_obtain_alias(ext4_iget_normal(d_inode(child)->i_sb, ino));
}
/*
/* create map in the end of data2 block */
map = (struct dx_map_entry *) (data2 + blocksize);
- count = dx_make_map((struct ext4_dir_entry_2 *) data1,
+ count = dx_make_map(dir, (struct ext4_dir_entry_2 *) data1,
blocksize, hinfo, map);
map -= count;
dx_sort_map(map, count);
hash2, split, count-split));
/* Fancy dance to stay within two buffers */
- de2 = dx_move_dirents(data1, data2, map + split, count - split, blocksize);
+ de2 = dx_move_dirents(data1, data2, map + split, count - split,
+ blocksize);
de = dx_pack_dirents(data1, blocksize);
de->rec_len = ext4_rec_len_to_disk(data1 + (blocksize - csum_size) -
(char *) de,
initialize_dirent_tail(t, blocksize);
}
- dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data1, blocksize, 1));
- dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1));
+ dxtrace(dx_show_leaf(dir, hinfo, (struct ext4_dir_entry_2 *) data1,
+ blocksize, 1));
+ dxtrace(dx_show_leaf(dir, hinfo, (struct ext4_dir_entry_2 *) data2,
+ blocksize, 1));
/* Which block gets the new entry? */
if (hinfo->hash >= hash2) {
int nlen, rlen;
unsigned int offset = 0;
char *top;
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ struct ext4_str fname_crypto_str = {.name = NULL, .len = 0};
+ int res;
+
+ ctx = ext4_get_fname_crypto_ctx(dir, EXT4_NAME_LEN);
+ if (IS_ERR(ctx))
+ return -1;
+
+ if (ctx != NULL) {
+ /* Calculate record length needed to store the entry */
+ res = ext4_fname_crypto_namelen_on_disk(ctx, namelen);
+ if (res < 0) {
+ ext4_put_fname_crypto_ctx(&ctx);
+ return res;
+ }
+ reclen = EXT4_DIR_REC_LEN(res);
+ }
de = (struct ext4_dir_entry_2 *)buf;
top = buf + buf_size - reclen;
while ((char *) de <= top) {
if (ext4_check_dir_entry(dir, NULL, de, bh,
- buf, buf_size, offset))
- return -EIO;
- if (ext4_match(namelen, name, de))
- return -EEXIST;
+ buf, buf_size, offset)) {
+ res = -EIO;
+ goto return_result;
+ }
+ /* Provide crypto context and crypto buffer to ext4 match */
+ res = ext4_match(ctx, &fname_crypto_str, namelen, name, de);
+ if (res < 0)
+ goto return_result;
+ if (res > 0) {
+ res = -EEXIST;
+ goto return_result;
+ }
nlen = EXT4_DIR_REC_LEN(de->name_len);
rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
if ((de->inode ? rlen - nlen : rlen) >= reclen)
de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
offset += rlen;
}
- if ((char *) de > top)
- return -ENOSPC;
- *dest_de = de;
- return 0;
+ if ((char *) de > top)
+ res = -ENOSPC;
+ else {
+ *dest_de = de;
+ res = 0;
+ }
+return_result:
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_fname_crypto_free_buffer(&fname_crypto_str);
+ return res;
}
-void ext4_insert_dentry(struct inode *inode,
- struct ext4_dir_entry_2 *de,
- int buf_size,
- const char *name, int namelen)
+int ext4_insert_dentry(struct inode *dir,
+ struct inode *inode,
+ struct ext4_dir_entry_2 *de,
+ int buf_size,
+ const struct qstr *iname,
+ const char *name, int namelen)
{
int nlen, rlen;
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ struct ext4_str fname_crypto_str = {.name = NULL, .len = 0};
+ struct ext4_str tmp_str;
+ int res;
+
+ ctx = ext4_get_fname_crypto_ctx(dir, EXT4_NAME_LEN);
+ if (IS_ERR(ctx))
+ return -EIO;
+ /* By default, the input name would be written to the disk */
+ tmp_str.name = (unsigned char *)name;
+ tmp_str.len = namelen;
+ if (ctx != NULL) {
+ /* Directory is encrypted */
+ res = ext4_fname_crypto_alloc_buffer(ctx, EXT4_NAME_LEN,
+ &fname_crypto_str);
+ if (res < 0) {
+ ext4_put_fname_crypto_ctx(&ctx);
+ return -ENOMEM;
+ }
+ res = ext4_fname_usr_to_disk(ctx, iname, &fname_crypto_str);
+ if (res < 0) {
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_fname_crypto_free_buffer(&fname_crypto_str);
+ return res;
+ }
+ tmp_str.name = fname_crypto_str.name;
+ tmp_str.len = fname_crypto_str.len;
+ }
nlen = EXT4_DIR_REC_LEN(de->name_len);
rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
if (de->inode) {
struct ext4_dir_entry_2 *de1 =
- (struct ext4_dir_entry_2 *)((char *)de + nlen);
+ (struct ext4_dir_entry_2 *)((char *)de + nlen);
de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, buf_size);
de->rec_len = ext4_rec_len_to_disk(nlen, buf_size);
de = de1;
de->file_type = EXT4_FT_UNKNOWN;
de->inode = cpu_to_le32(inode->i_ino);
ext4_set_de_type(inode->i_sb, de, inode->i_mode);
- de->name_len = namelen;
- memcpy(de->name, name, namelen);
+ de->name_len = tmp_str.len;
+
+ memcpy(de->name, tmp_str.name, tmp_str.len);
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_fname_crypto_free_buffer(&fname_crypto_str);
+ return 0;
}
+
/*
* Add a new entry into a directory (leaf) block. If de is non-NULL,
* it points to a directory entry which is guaranteed to be large
struct inode *inode, struct ext4_dir_entry_2 *de,
struct buffer_head *bh)
{
- struct inode *dir = dentry->d_parent->d_inode;
+ struct inode *dir = d_inode(dentry->d_parent);
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
unsigned int blocksize = dir->i_sb->s_blocksize;
return err;
}
- /* By now the buffer is marked for journaling */
- ext4_insert_dentry(inode, de, blocksize, name, namelen);
+ /* By now the buffer is marked for journaling. Due to crypto operations,
+ * the following function call may fail */
+ err = ext4_insert_dentry(dir, inode, de, blocksize, &dentry->d_name,
+ name, namelen);
+ if (err < 0)
+ return err;
/*
* XXX shouldn't update any times until successful
static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
struct inode *inode, struct buffer_head *bh)
{
- struct inode *dir = dentry->d_parent->d_inode;
+ struct inode *dir = d_inode(dentry->d_parent);
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ int res;
+#else
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
+#endif
struct buffer_head *bh2;
struct dx_root *root;
struct dx_frame frames[2], *frame;
struct dx_hash_info hinfo;
ext4_lblk_t block;
struct fake_dirent *fde;
- int csum_size = 0;
+ int csum_size = 0;
+
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ ctx = ext4_get_fname_crypto_ctx(dir, EXT4_NAME_LEN);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+#endif
if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
if (hinfo.hash_version <= DX_HASH_TEA)
hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ res = ext4_fname_usr_to_hash(ctx, &dentry->d_name, &hinfo);
+ if (res < 0) {
+ ext4_put_fname_crypto_ctx(&ctx);
+ ext4_mark_inode_dirty(handle, dir);
+ brelse(bh);
+ return res;
+ }
+ ext4_put_fname_crypto_ctx(&ctx);
+#else
ext4fs_dirhash(name, namelen, &hinfo);
+#endif
memset(frames, 0, sizeof(frames));
frame = frames;
frame->entries = entries;
static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode)
{
- struct inode *dir = dentry->d_parent->d_inode;
- struct buffer_head *bh;
+ struct inode *dir = d_inode(dentry->d_parent);
+ struct buffer_head *bh = NULL;
struct ext4_dir_entry_2 *de;
struct ext4_dir_entry_tail *t;
struct super_block *sb;
return retval;
if (retval == 1) {
retval = 0;
- return retval;
+ goto out;
}
}
if (is_dx(dir)) {
retval = ext4_dx_add_entry(handle, dentry, inode);
if (!retval || (retval != ERR_BAD_DX_DIR))
- return retval;
+ goto out;
ext4_clear_inode_flag(dir, EXT4_INODE_INDEX);
dx_fallback++;
ext4_mark_inode_dirty(handle, dir);
return PTR_ERR(bh);
retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
- if (retval != -ENOSPC) {
- brelse(bh);
- return retval;
- }
+ if (retval != -ENOSPC)
+ goto out;
if (blocks == 1 && !dx_fallback &&
- EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
- return make_indexed_dir(handle, dentry, inode, bh);
+ EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) {
+ retval = make_indexed_dir(handle, dentry, inode, bh);
+ bh = NULL; /* make_indexed_dir releases bh */
+ goto out;
+ }
brelse(bh);
}
bh = ext4_append(handle, dir, &block);
}
retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
+out:
brelse(bh);
if (retval == 0)
ext4_set_inode_state(inode, EXT4_STATE_NEWENTRY);
struct dx_entry *entries, *at;
struct dx_hash_info hinfo;
struct buffer_head *bh;
- struct inode *dir = dentry->d_parent->d_inode;
+ struct inode *dir = d_inode(dentry->d_parent);
struct super_block *sb = dir->i_sb;
struct ext4_dir_entry_2 *de;
int err;
inode->i_op = &ext4_file_inode_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
- err = ext4_add_nondir(handle, dentry, inode);
+ err = 0;
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ if (!err && (ext4_encrypted_inode(dir) ||
+ DUMMY_ENCRYPTION_ENABLED(EXT4_SB(dir->i_sb)))) {
+ err = ext4_inherit_context(dir, inode);
+ if (err) {
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ }
+ }
+#endif
+ if (!err)
+ err = ext4_add_nondir(handle, dentry, inode);
if (!err && IS_DIRSYNC(dir))
ext4_handle_sync(handle);
}
err = ext4_init_new_dir(handle, dir, inode);
if (err)
goto out_clear_inode;
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ if (ext4_encrypted_inode(dir) ||
+ DUMMY_ENCRYPTION_ENABLED(EXT4_SB(dir->i_sb))) {
+ err = ext4_inherit_context(dir, inode);
+ if (err)
+ goto out_clear_inode;
+ }
+#endif
err = ext4_mark_inode_dirty(handle, inode);
if (!err)
err = ext4_add_entry(handle, dentry, inode);
/*
* routine to check that the specified directory is empty (for rmdir)
*/
-static int empty_dir(struct inode *inode)
+int ext4_empty_dir(struct inode *inode)
{
unsigned int offset;
struct buffer_head *bh;
/* Initialize quotas before so that eventual writes go in
* separate transaction */
dquot_initialize(dir);
- dquot_initialize(dentry->d_inode);
+ dquot_initialize(d_inode(dentry));
retval = -ENOENT;
bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
if (!bh)
goto end_rmdir;
- inode = dentry->d_inode;
+ inode = d_inode(dentry);
retval = -EIO;
if (le32_to_cpu(de->inode) != inode->i_ino)
goto end_rmdir;
retval = -ENOTEMPTY;
- if (!empty_dir(inode))
+ if (!ext4_empty_dir(inode))
goto end_rmdir;
handle = ext4_journal_start(dir, EXT4_HT_DIR,
/* Initialize quotas before so that eventual writes go
* in separate transaction */
dquot_initialize(dir);
- dquot_initialize(dentry->d_inode);
+ dquot_initialize(d_inode(dentry));
retval = -ENOENT;
bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
if (!bh)
goto end_unlink;
- inode = dentry->d_inode;
+ inode = d_inode(dentry);
retval = -EIO;
if (le32_to_cpu(de->inode) != inode->i_ino)
{
handle_t *handle;
struct inode *inode;
- int l, err, retries = 0;
+ int err, len = strlen(symname);
int credits;
-
- l = strlen(symname)+1;
- if (l > dir->i_sb->s_blocksize)
+ bool encryption_required;
+ struct ext4_str disk_link;
+ struct ext4_encrypted_symlink_data *sd = NULL;
+
+ disk_link.len = len + 1;
+ disk_link.name = (char *) symname;
+
+ encryption_required = (ext4_encrypted_inode(dir) ||
+ DUMMY_ENCRYPTION_ENABLED(EXT4_SB(dir->i_sb)));
+ if (encryption_required)
+ disk_link.len = encrypted_symlink_data_len(len) + 1;
+ if (disk_link.len > dir->i_sb->s_blocksize)
return -ENAMETOOLONG;
dquot_initialize(dir);
- if (l > EXT4_N_BLOCKS * 4) {
+ if ((disk_link.len > EXT4_N_BLOCKS * 4)) {
/*
* For non-fast symlinks, we just allocate inode and put it on
* orphan list in the first transaction => we need bitmap,
credits = EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3;
}
-retry:
+
inode = ext4_new_inode_start_handle(dir, S_IFLNK|S_IRWXUGO,
&dentry->d_name, 0, NULL,
EXT4_HT_DIR, credits);
handle = ext4_journal_current_handle();
- err = PTR_ERR(inode);
- if (IS_ERR(inode))
- goto out_stop;
+ if (IS_ERR(inode)) {
+ if (handle)
+ ext4_journal_stop(handle);
+ return PTR_ERR(inode);
+ }
+
+ if (encryption_required) {
+ struct ext4_fname_crypto_ctx *ctx = NULL;
+ struct qstr istr;
+ struct ext4_str ostr;
+
+ sd = kzalloc(disk_link.len, GFP_NOFS);
+ if (!sd) {
+ err = -ENOMEM;
+ goto err_drop_inode;
+ }
+ err = ext4_inherit_context(dir, inode);
+ if (err)
+ goto err_drop_inode;
+ ctx = ext4_get_fname_crypto_ctx(inode,
+ inode->i_sb->s_blocksize);
+ if (IS_ERR_OR_NULL(ctx)) {
+ /* We just set the policy, so ctx should not be NULL */
+ err = (ctx == NULL) ? -EIO : PTR_ERR(ctx);
+ goto err_drop_inode;
+ }
+ istr.name = (const unsigned char *) symname;
+ istr.len = len;
+ ostr.name = sd->encrypted_path;
+ err = ext4_fname_usr_to_disk(ctx, &istr, &ostr);
+ ext4_put_fname_crypto_ctx(&ctx);
+ if (err < 0)
+ goto err_drop_inode;
+ sd->len = cpu_to_le16(ostr.len);
+ disk_link.name = (char *) sd;
+ }
- if (l > EXT4_N_BLOCKS * 4) {
+ if ((disk_link.len > EXT4_N_BLOCKS * 4)) {
inode->i_op = &ext4_symlink_inode_operations;
ext4_set_aops(inode);
/*
drop_nlink(inode);
err = ext4_orphan_add(handle, inode);
ext4_journal_stop(handle);
+ handle = NULL;
if (err)
goto err_drop_inode;
- err = __page_symlink(inode, symname, l, 1);
+ err = __page_symlink(inode, disk_link.name, disk_link.len, 1);
if (err)
goto err_drop_inode;
/*
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
+ handle = NULL;
goto err_drop_inode;
}
set_nlink(inode, 1);
err = ext4_orphan_del(handle, inode);
- if (err) {
- ext4_journal_stop(handle);
- clear_nlink(inode);
+ if (err)
goto err_drop_inode;
- }
} else {
/* clear the extent format for fast symlink */
ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
- inode->i_op = &ext4_fast_symlink_inode_operations;
- memcpy((char *)&EXT4_I(inode)->i_data, symname, l);
- inode->i_size = l-1;
+ inode->i_op = encryption_required ?
+ &ext4_symlink_inode_operations :
+ &ext4_fast_symlink_inode_operations;
+ memcpy((char *)&EXT4_I(inode)->i_data, disk_link.name,
+ disk_link.len);
+ inode->i_size = disk_link.len - 1;
}
EXT4_I(inode)->i_disksize = inode->i_size;
err = ext4_add_nondir(handle, dentry, inode);
if (!err && IS_DIRSYNC(dir))
ext4_handle_sync(handle);
-out_stop:
if (handle)
ext4_journal_stop(handle);
- if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
- goto retry;
+ kfree(sd);
return err;
err_drop_inode:
+ if (handle)
+ ext4_journal_stop(handle);
+ kfree(sd);
+ clear_nlink(inode);
unlock_new_inode(inode);
iput(inode);
return err;
struct inode *dir, struct dentry *dentry)
{
handle_t *handle;
- struct inode *inode = old_dentry->d_inode;
+ struct inode *inode = d_inode(old_dentry);
int err, retries = 0;
if (inode->i_nlink >= EXT4_LINK_MAX)
return -EMLINK;
-
+ if (ext4_encrypted_inode(dir) &&
+ !ext4_is_child_context_consistent_with_parent(dir, inode))
+ return -EPERM;
dquot_initialize(dir);
retry:
struct ext4_renament old = {
.dir = old_dir,
.dentry = old_dentry,
- .inode = old_dentry->d_inode,
+ .inode = d_inode(old_dentry),
};
struct ext4_renament new = {
.dir = new_dir,
.dentry = new_dentry,
- .inode = new_dentry->d_inode,
+ .inode = d_inode(new_dentry),
};
int force_reread;
int retval;
if (!old.bh || le32_to_cpu(old.de->inode) != old.inode->i_ino)
goto end_rename;
+ if ((old.dir != new.dir) &&
+ ext4_encrypted_inode(new.dir) &&
+ !ext4_is_child_context_consistent_with_parent(new.dir,
+ old.inode)) {
+ retval = -EPERM;
+ goto end_rename;
+ }
+
new.bh = ext4_find_entry(new.dir, &new.dentry->d_name,
&new.de, &new.inlined);
if (IS_ERR(new.bh)) {
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2);
if (!(flags & RENAME_WHITEOUT)) {
handle = ext4_journal_start(old.dir, EXT4_HT_DIR, credits);
- if (IS_ERR(handle))
- return PTR_ERR(handle);
+ if (IS_ERR(handle)) {
+ retval = PTR_ERR(handle);
+ handle = NULL;
+ goto end_rename;
+ }
} else {
whiteout = ext4_whiteout_for_rename(&old, credits, &handle);
- if (IS_ERR(whiteout))
- return PTR_ERR(whiteout);
+ if (IS_ERR(whiteout)) {
+ retval = PTR_ERR(whiteout);
+ whiteout = NULL;
+ goto end_rename;
+ }
}
if (IS_DIRSYNC(old.dir) || IS_DIRSYNC(new.dir))
if (S_ISDIR(old.inode->i_mode)) {
if (new.inode) {
retval = -ENOTEMPTY;
- if (!empty_dir(new.inode))
+ if (!ext4_empty_dir(new.inode))
goto end_rename;
} else {
retval = -EMLINK;
ext4_dec_count(handle, old.dir);
if (new.inode) {
- /* checked empty_dir above, can't have another parent,
- * ext4_dec_count() won't work for many-linked dirs */
+ /* checked ext4_empty_dir above, can't have another
+ * parent, ext4_dec_count() won't work for many-linked
+ * dirs */
clear_nlink(new.inode);
} else {
ext4_inc_count(handle, new.dir);
struct ext4_renament old = {
.dir = old_dir,
.dentry = old_dentry,
- .inode = old_dentry->d_inode,
+ .inode = d_inode(old_dentry),
};
struct ext4_renament new = {
.dir = new_dir,
.dentry = new_dentry,
- .inode = new_dentry->d_inode,
+ .inode = d_inode(new_dentry),
};
u8 new_file_type;
int retval;
handle = ext4_journal_start(old.dir, EXT4_HT_DIR,
(2 * EXT4_DATA_TRANS_BLOCKS(old.dir->i_sb) +
2 * EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2));
- if (IS_ERR(handle))
- return PTR_ERR(handle);
+ if (IS_ERR(handle)) {
+ retval = PTR_ERR(handle);
+ handle = NULL;
+ goto end_rename;
+ }
if (IS_DIRSYNC(old.dir) || IS_DIRSYNC(new.dir))
ext4_handle_sync(handle);
projects / linux-2.6-block.git / blobdiff