On 2017/10/31 17:02, Sheng Yong wrote:
>
>
> On 2017/10/31 15:51, Chao Yu wrote:
>> On 2017/10/31 9:38, Sheng Yong wrote:
> [...]
>>> +
>>> +void print_xattr_entry(struct f2fs_xattr_entry *ent)
>>> +{
>>> + char *value = (char *)(ent->e_name + le16_to_cpu(ent->e_name_len));
>>> + struct fscrypt_context *ctx;
>>> + int i;
>>> +
>>> + MSG(0, "\nxattr: e_name_index:%d e_name:", ent->e_name_index);
>>> + for (i = 0; i < le16_to_cpu(ent->e_name_len); i++)
>>> + MSG(0, "%c", ent->e_name[i]);
>>> + MSG(0, " e_name_len:%d e_value_size:%d e_value:\n",
>>> + ent->e_name_len, le16_to_cpu(ent->e_value_size));
>>> +
>>> + switch (ent->e_name_index) {
>>> + case F2FS_XATTR_INDEX_USER:
>>> + case F2FS_XATTR_INDEX_SECURITY:
>>> + for (i = 0; i < le16_to_cpu(ent->e_value_size); i++)
>>> + MSG(0, "%c", value[i]);
>>
>> It could be unreadable if user stores pure value in xattr entry.
> Actually, I'm not quite sure about the value of each type of xattr. But does
> USER xattr contain only plain text?
IIRC, there is no such restriction, value can be any type, with variable length.
Thanks,
>
> thanks,
> Sheng
>>
>> Thanks,
>>
>>> + MSG(0, "\n");
>>> + break;
>>> + case F2FS_XATTR_INDEX_POSIX_ACL_ACCESS:
>>> + case F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT:
>>> + print_acl(value, le16_to_cpu(ent->e_value_size));
>>> + break;
>>> + case F2FS_XATTR_INDEX_TRUSTED:
>>> + case F2FS_XATTR_INDEX_LUSTRE:
>>> + for (i = 0; i < le16_to_cpu(ent->e_value_size); i++)
>>> + MSG(0, "%02X", value[i]);
>>> + MSG(0, "\n");
>>> + break;
>>> + case F2FS_XATTR_INDEX_ENCRYPTION:
>>> + ctx = (struct fscrypt_context *)value;
>>> + MSG(0, "format: %d\n", ctx->format);
>>> + MSG(0, "contents_encryption_mode: 0x%x\n",
>>> ctx->contents_encryption_mode);
>>> + MSG(0, "filenames_encryption_mode: 0x%x\n",
>>> ctx->filenames_encryption_mode);
>>> + MSG(0, "flags: 0x%x\n", ctx->flags);
>>> + MSG(0, "master_key_descriptor: ");
>>> + for (i = 0; i < FS_KEY_DESCRIPTOR_SIZE; i++)
>>> + MSG(0, "%02X", ctx->master_key_descriptor[i]);
>>> + MSG(0, "\nnonce: ");
>>> + for (i = 0; i < FS_KEY_DERIVATION_NONCE_SIZE; i++)
>>> + MSG(0, "%02X", ctx->nonce[i]);
>>> + MSG(0, "\n");
>>> + break;
>>> + default:
>>> + break;
>>> + }
>>> +}
>>> +
>>> +void print_inode_info(struct f2fs_sb_info *sbi,
>>> + struct f2fs_node *node, int name)
>>> +{
>>> + struct f2fs_inode *inode = &node->i;
>>> + void *xattr_addr;
>>> + struct f2fs_xattr_entry *ent;
>>> unsigned char en[F2FS_NAME_LEN + 1];
>>> unsigned int i = 0;
>>> int namelen = le32_to_cpu(inode->i_namelen);
>>> @@ -111,17 +225,24 @@ void print_inode_info(struct f2fs_inode *inode, int
>>> name)
>>> DISP_u32(inode, i_nid[3]); /* indirect */
>>> DISP_u32(inode, i_nid[4]); /* double indirect */
>>>
>>> + xattr_addr = read_all_xattrs(sbi, node);
>>> + list_for_each_xattr(ent, xattr_addr) {
>>> + print_xattr_entry(ent);
>>> + }
>>> + free(xattr_addr);
>>> +
>>> printf("\n");
>>> }
>>>
>>> -void print_node_info(struct f2fs_node *node_block, int verbose)
>>> +void print_node_info(struct f2fs_sb_info *sbi,
>>> + struct f2fs_node *node_block, int verbose)
>>> {
>>> nid_t ino = le32_to_cpu(node_block->footer.ino);
>>> nid_t nid = le32_to_cpu(node_block->footer.nid);
>>> /* Is this inode? */
>>> if (ino == nid) {
>>> DBG(verbose, "Node ID [0x%x:%u] is inode\n", nid, nid);
>>> - print_inode_info(&node_block->i, verbose);
>>> + print_inode_info(sbi, node_block, verbose);
>>> } else {
>>> int i;
>>> u32 *dump_blk = (u32 *)node_block;
>>> diff --git a/fsck/xattr.c b/fsck/xattr.c
>>> index 3f5c7d3..1d0f7d3 100644
>>> --- a/fsck/xattr.c
>>> +++ b/fsck/xattr.c
>>> @@ -20,7 +20,7 @@
>>> #define XATTR_CREATE 0x1
>>> #define XATTR_REPLACE 0x2
>>>
>>> -static void *read_all_xattrs(struct f2fs_sb_info *sbi, struct f2fs_node
>>> *inode)
>>> +void *read_all_xattrs(struct f2fs_sb_info *sbi, struct f2fs_node *inode)
>>> {
>>> struct f2fs_xattr_header *header;
>>> void *txattr_addr;
>>> diff --git a/fsck/xattr.h b/fsck/xattr.h
>>> index b414629..beed3bb 100644
>>> --- a/fsck/xattr.h
>>> +++ b/fsck/xattr.h
>>> @@ -31,10 +31,62 @@ struct f2fs_xattr_entry {
>>> char e_name[0]; /* attribute name */
>>> };
>>>
>>> +#define FS_KEY_DESCRIPTOR_SIZE 8
>>> +#define FS_KEY_DERIVATION_NONCE_SIZE 16
>>> +
>>> +struct fscrypt_context {
>>> + u8 format;
>>> + u8 contents_encryption_mode;
>>> + u8 filenames_encryption_mode;
>>> + u8 flags;
>>> + u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
>>> + u8 nonce[FS_KEY_DERIVATION_NONCE_SIZE];
>>> +} __attribute__((packed));
>>> +
>>> +#define F2FS_ACL_VERSION 0x0001
>>> +
>>> +struct f2fs_acl_entry {
>>> + __le16 e_tag;
>>> + __le16 e_perm;
>>> + __le32 e_id;
>>> +};
>>> +
>>> +struct f2fs_acl_entry_short {
>>> + __le16 e_tag;
>>> + __le16 e_perm;
>>> +};
>>> +
>>> +struct f2fs_acl_header {
>>> + __le32 a_version;
>>> +};
>>> +
>>> +static inline int f2fs_acl_count(int size)
>>> +{
>>> + ssize_t s;
>>> + size -= sizeof(struct f2fs_acl_header);
>>> + s = size - 4 * sizeof(struct f2fs_acl_entry_short);
>>> + if (s < 0) {
>>> + if (size % sizeof(struct f2fs_acl_entry_short))
>>> + return -1;
>>> + return size / sizeof(struct f2fs_acl_entry_short);
>>> + } else {
>>> + if (s % sizeof(struct f2fs_acl_entry))
>>> + return -1;
>>> + return s / sizeof(struct f2fs_acl_entry) + 4;
>>> + }
>>> +}
>>> +
>>> #define XATTR_ROUND (3)
>>>
>>> #define XATTR_SELINUX_SUFFIX "selinux"
>>> -#define F2FS_XATTR_INDEX_SECURITY 6
>>> +#define F2FS_XATTR_INDEX_USER 1
>>> +#define F2FS_XATTR_INDEX_POSIX_ACL_ACCESS 2
>>> +#define F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT 3
>>> +#define F2FS_XATTR_INDEX_TRUSTED 4
>>> +#define F2FS_XATTR_INDEX_LUSTRE 5
>>> +#define F2FS_XATTR_INDEX_SECURITY 6
>>> +#define F2FS_XATTR_INDEX_ENCRYPTION 9
>>> +
>>> #define IS_XATTR_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
>>>
>>> #define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr))
>>>
>>
>>
>> .
>>
>
>
> .
>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
