diff options
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index cfacf2c97e94..0dafdbae1f8c 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -426,6 +426,196 @@ smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, return rc; } +#ifdef CONFIG_CIFS_XATTR +static ssize_t +move_smb2_ea_to_cifs(char *dst, size_t dst_size, + struct smb2_file_full_ea_info *src, size_t src_size, + const unsigned char *ea_name) +{ + int rc = 0; + unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; + char *name, *value; + size_t name_len, value_len, user_name_len; + + while (src_size > 0) { + name = &src->ea_data[0]; + name_len = (size_t)src->ea_name_length; + value = &src->ea_data[src->ea_name_length + 1]; + value_len = (size_t)le16_to_cpu(src->ea_value_length); + + if (name_len == 0) { + break; + } + + if (src_size < 8 + name_len + 1 + value_len) { + cifs_dbg(FYI, "EA entry goes beyond length of list\n"); + rc = -EIO; + goto out; + } + + if (ea_name) { + if (ea_name_len == name_len && + memcmp(ea_name, name, name_len) == 0) { + rc = value_len; + if (dst_size == 0) + goto out; + if (dst_size < value_len) { + rc = -ERANGE; + goto out; + } + memcpy(dst, value, value_len); + goto out; + } + } else { + /* 'user.' plus a terminating null */ + user_name_len = 5 + 1 + name_len; + + rc += user_name_len; + + if (dst_size >= user_name_len) { + dst_size -= user_name_len; + memcpy(dst, "user.", 5); + dst += 5; + memcpy(dst, src->ea_data, name_len); + dst += name_len; + *dst = 0; + ++dst; + } else if (dst_size == 0) { + /* skip copy - calc size only */ + } else { + /* stop before overrun buffer */ + rc = -ERANGE; + break; + } + } + + if (!src->next_entry_offset) + break; + + if (src_size < le32_to_cpu(src->next_entry_offset)) { + /* stop before overrun buffer */ + rc = -ERANGE; + break; + } + src_size -= le32_to_cpu(src->next_entry_offset); + src = (void *)((char *)src + + le32_to_cpu(src->next_entry_offset)); + } + + /* didn't find the named attribute */ + if (ea_name) + rc = -ENODATA; + +out: + return (ssize_t)rc; +} + +static ssize_t +smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, + const unsigned char *path, const unsigned char *ea_name, + char *ea_data, size_t buf_size, + struct cifs_sb_info *cifs_sb) +{ + int rc; + __le16 *utf16_path; + __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + struct cifs_open_parms oparms; + struct cifs_fid fid; + struct smb2_file_full_ea_info *smb2_data; + + utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); + if (!utf16_path) + return -ENOMEM; + + oparms.tcon = tcon; + oparms.desired_access = FILE_READ_EA; + oparms.disposition = FILE_OPEN; + oparms.create_options = 0; + oparms.fid = &fid; + oparms.reconnect = false; + + rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL); + kfree(utf16_path); + if (rc) { + cifs_dbg(FYI, "open failed rc=%d\n", rc); + return rc; + } + + smb2_data = kzalloc(SMB2_MAX_EA_BUF, GFP_KERNEL); + if (smb2_data == NULL) { + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + return -ENOMEM; + } + + rc = SMB2_query_eas(xid, tcon, fid.persistent_fid, fid.volatile_fid, + smb2_data); + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + + if (!rc) + rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data, + SMB2_MAX_EA_BUF, ea_name); + + kfree(smb2_data); + return rc; +} + + +static int +smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, + const char *path, const char *ea_name, const void *ea_value, + const __u16 ea_value_len, const struct nls_table *nls_codepage, + struct cifs_sb_info *cifs_sb) +{ + int rc; + __le16 *utf16_path; + __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + struct cifs_open_parms oparms; + struct cifs_fid fid; + struct smb2_file_full_ea_info *ea; + int ea_name_len = strlen(ea_name); + int len; + + if (ea_name_len > 255) + return -EINVAL; + + utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); + if (!utf16_path) + return -ENOMEM; + + oparms.tcon = tcon; + oparms.desired_access = FILE_WRITE_EA; + oparms.disposition = FILE_OPEN; + oparms.create_options = 0; + oparms.fid = &fid; + oparms.reconnect = false; + + rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL); + kfree(utf16_path); + if (rc) { + cifs_dbg(FYI, "open failed rc=%d\n", rc); + return rc; + } + + len = sizeof(ea) + ea_name_len + ea_value_len + 1; + ea = kzalloc(len, GFP_KERNEL); + if (ea == NULL) { + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + return -ENOMEM; + } + + ea->ea_name_length = ea_name_len; + ea->ea_value_length = cpu_to_le16(ea_value_len); + memcpy(ea->ea_data, ea_name, ea_name_len + 1); + memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); + + rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea, + len); + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + + return rc; +} +#endif + static bool smb2_can_echo(struct TCP_Server_Info *server) { @@ -2572,6 +2762,10 @@ struct smb_version_operations smb20_operations = { .dir_needs_close = smb2_dir_needs_close, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, +#ifdef CONFIG_CIFS_XATTR + .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, +#endif /* CIFS_XATTR */ #ifdef CONFIG_CIFS_ACL .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, @@ -2662,6 +2856,10 @@ struct smb_version_operations smb21_operations = { .enum_snapshots = smb3_enum_snapshots, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, +#ifdef CONFIG_CIFS_XATTR + .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, +#endif /* CIFS_XATTR */ #ifdef CONFIG_CIFS_ACL .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, @@ -2762,6 +2960,10 @@ struct smb_version_operations smb30_operations = { .receive_transform = smb3_receive_transform, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, +#ifdef CONFIG_CIFS_XATTR + .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, +#endif /* CIFS_XATTR */ #ifdef CONFIG_CIFS_ACL .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, @@ -2863,6 +3065,10 @@ struct smb_version_operations smb311_operations = { .receive_transform = smb3_receive_transform, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, +#ifdef CONFIG_CIFS_XATTR + .query_all_EAs = smb2_query_eas, + .set_EA = smb2_set_ea, +#endif /* CIFS_XATTR */ }; #endif /* CIFS_SMB311 */ @@ -2906,6 +3112,46 @@ struct smb_version_values smb21_values = { .create_lease_size = sizeof(struct create_lease), }; +struct smb_version_values smb3any_values = { + .version_string = SMB3ANY_VERSION_STRING, + .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ + .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, + .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, + .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, + .create_lease_size = sizeof(struct create_lease_v2), +}; + +struct smb_version_values smbdefault_values = { + .version_string = SMBDEFAULT_VERSION_STRING, + .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ + .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, + .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, + .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, + .create_lease_size = sizeof(struct create_lease_v2), +}; + struct smb_version_values smb30_values = { .version_string = SMB30_VERSION_STRING, .protocol_id = SMB30_PROT_ID, |