| /* SPDX-License-Identifier: LGPL-2.1 */ |
| /* |
| * |
| * Copyright (C) International Business Machines Corp., 2002,2008 |
| * Author(s): Steve French (sfrench@us.ibm.com) |
| * Jeremy Allison (jra@samba.org) |
| * |
| */ |
| #ifndef _CIFS_GLOB_H |
| #define _CIFS_GLOB_H |
| |
| #include <linux/in.h> |
| #include <linux/in6.h> |
| #include <linux/inet.h> |
| #include <linux/slab.h> |
| #include <linux/scatterlist.h> |
| #include <linux/mm.h> |
| #include <linux/mempool.h> |
| #include <linux/workqueue.h> |
| #include <linux/utsname.h> |
| #include <linux/sched/mm.h> |
| #include <linux/netfs.h> |
| #include "cifs_fs_sb.h" |
| #include "cifsacl.h" |
| #include <crypto/internal/hash.h> |
| #include <uapi/linux/cifs/cifs_mount.h> |
| #include "../smbfs_common/smb2pdu.h" |
| #include "smb2pdu.h" |
| #include <linux/filelock.h> |
| |
| #define SMB_PATH_MAX 260 |
| #define CIFS_PORT 445 |
| #define RFC1001_PORT 139 |
| |
| /* |
| * The sizes of various internal tables and strings |
| */ |
| #define MAX_UID_INFO 16 |
| #define MAX_SES_INFO 2 |
| #define MAX_TCON_INFO 4 |
| |
| #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1) |
| |
| #define CIFS_MIN_RCV_POOL 4 |
| |
| #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */ |
| /* |
| * default attribute cache timeout (jiffies) |
| */ |
| #define CIFS_DEF_ACTIMEO (1 * HZ) |
| |
| /* |
| * max attribute cache timeout (jiffies) - 2^30 |
| */ |
| #define CIFS_MAX_ACTIMEO (1 << 30) |
| |
| /* |
| * Max persistent and resilient handle timeout (milliseconds). |
| * Windows durable max was 960000 (16 minutes) |
| */ |
| #define SMB3_MAX_HANDLE_TIMEOUT 960000 |
| |
| /* |
| * MAX_REQ is the maximum number of requests that WE will send |
| * on one socket concurrently. |
| */ |
| #define CIFS_MAX_REQ 32767 |
| |
| #define RFC1001_NAME_LEN 15 |
| #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) |
| |
| /* maximum length of ip addr as a string (including ipv6 and sctp) */ |
| #define SERVER_NAME_LENGTH 80 |
| #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) |
| |
| /* echo interval in seconds */ |
| #define SMB_ECHO_INTERVAL_MIN 1 |
| #define SMB_ECHO_INTERVAL_MAX 600 |
| #define SMB_ECHO_INTERVAL_DEFAULT 60 |
| |
| /* smb multichannel query server interfaces interval in seconds */ |
| #define SMB_INTERFACE_POLL_INTERVAL 600 |
| |
| /* maximum number of PDUs in one compound */ |
| #define MAX_COMPOUND 5 |
| |
| /* |
| * Default number of credits to keep available for SMB3. |
| * This value is chosen somewhat arbitrarily. The Windows client |
| * defaults to 128 credits, the Windows server allows clients up to |
| * 512 credits (or 8K for later versions), and the NetApp server |
| * does not limit clients at all. Choose a high enough default value |
| * such that the client shouldn't limit performance, but allow mount |
| * to override (until you approach 64K, where we limit credits to 65000 |
| * to reduce possibility of seeing more server credit overflow bugs. |
| */ |
| #define SMB2_MAX_CREDITS_AVAILABLE 32000 |
| |
| #include "cifspdu.h" |
| |
| #ifndef XATTR_DOS_ATTRIB |
| #define XATTR_DOS_ATTRIB "user.DOSATTRIB" |
| #endif |
| |
| #define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */ |
| |
| #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses)) |
| |
| /* |
| * CIFS vfs client Status information (based on what we know.) |
| */ |
| |
| /* associated with each connection */ |
| enum statusEnum { |
| CifsNew = 0, |
| CifsGood, |
| CifsExiting, |
| CifsNeedReconnect, |
| CifsNeedNegotiate, |
| CifsInNegotiate, |
| }; |
| |
| /* associated with each smb session */ |
| enum ses_status_enum { |
| SES_NEW = 0, |
| SES_GOOD, |
| SES_EXITING, |
| SES_NEED_RECON, |
| SES_IN_SETUP |
| }; |
| |
| /* associated with each tree connection to the server */ |
| enum tid_status_enum { |
| TID_NEW = 0, |
| TID_GOOD, |
| TID_EXITING, |
| TID_NEED_RECON, |
| TID_NEED_TCON, |
| TID_IN_TCON, |
| TID_NEED_FILES_INVALIDATE, /* currently unused */ |
| TID_IN_FILES_INVALIDATE |
| }; |
| |
| enum securityEnum { |
| Unspecified = 0, /* not specified */ |
| NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ |
| RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ |
| Kerberos, /* Kerberos via SPNEGO */ |
| }; |
| |
| struct session_key { |
| unsigned int len; |
| char *response; |
| }; |
| |
| /* crypto hashing related structure/fields, not specific to a sec mech */ |
| struct cifs_secmech { |
| struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */ |
| struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */ |
| struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */ |
| struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */ |
| struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */ |
| |
| struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */ |
| struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */ |
| }; |
| |
| /* per smb session structure/fields */ |
| struct ntlmssp_auth { |
| bool sesskey_per_smbsess; /* whether session key is per smb session */ |
| __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ |
| __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ |
| unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ |
| char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ |
| }; |
| |
| struct cifs_cred { |
| int uid; |
| int gid; |
| int mode; |
| int cecount; |
| struct cifs_sid osid; |
| struct cifs_sid gsid; |
| struct cifs_ntace *ntaces; |
| struct cifs_ace *aces; |
| }; |
| |
| struct cifs_open_info_data { |
| char *symlink_target; |
| union { |
| struct smb2_file_all_info fi; |
| struct smb311_posix_qinfo posix_fi; |
| }; |
| }; |
| |
| static inline void cifs_free_open_info(struct cifs_open_info_data *data) |
| { |
| kfree(data->symlink_target); |
| } |
| |
| /* |
| ***************************************************************** |
| * Except the CIFS PDUs themselves all the |
| * globally interesting structs should go here |
| ***************************************************************** |
| */ |
| |
| /* |
| * A smb_rqst represents a complete request to be issued to a server. It's |
| * formed by a kvec array, followed by an array of pages. Page data is assumed |
| * to start at the beginning of the first page. |
| */ |
| struct smb_rqst { |
| struct kvec *rq_iov; /* array of kvecs */ |
| unsigned int rq_nvec; /* number of kvecs in array */ |
| size_t rq_iter_size; /* Amount of data in ->rq_iter */ |
| struct iov_iter rq_iter; /* Data iterator */ |
| struct xarray rq_buffer; /* Page buffer for encryption */ |
| }; |
| |
| struct mid_q_entry; |
| struct TCP_Server_Info; |
| struct cifsFileInfo; |
| struct cifs_ses; |
| struct cifs_tcon; |
| struct dfs_info3_param; |
| struct cifs_fattr; |
| struct smb3_fs_context; |
| struct cifs_fid; |
| struct cifs_readdata; |
| struct cifs_writedata; |
| struct cifs_io_parms; |
| struct cifs_search_info; |
| struct cifsInodeInfo; |
| struct cifs_open_parms; |
| struct cifs_credits; |
| |
| struct smb_version_operations { |
| int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, |
| struct mid_q_entry *); |
| bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); |
| /* setup request: allocate mid, sign message */ |
| struct mid_q_entry *(*setup_request)(struct cifs_ses *, |
| struct TCP_Server_Info *, |
| struct smb_rqst *); |
| /* setup async request: allocate mid, sign message */ |
| struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, |
| struct smb_rqst *); |
| /* check response: verify signature, map error */ |
| int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, |
| bool); |
| void (*add_credits)(struct TCP_Server_Info *server, |
| const struct cifs_credits *credits, |
| const int optype); |
| void (*set_credits)(struct TCP_Server_Info *, const int); |
| int * (*get_credits_field)(struct TCP_Server_Info *, const int); |
| unsigned int (*get_credits)(struct mid_q_entry *); |
| __u64 (*get_next_mid)(struct TCP_Server_Info *); |
| void (*revert_current_mid)(struct TCP_Server_Info *server, |
| const unsigned int val); |
| /* data offset from read response message */ |
| unsigned int (*read_data_offset)(char *); |
| /* |
| * Data length from read response message |
| * When in_remaining is true, the returned data length is in |
| * message field DataRemaining for out-of-band data read (e.g through |
| * Memory Registration RDMA write in SMBD). |
| * Otherwise, the returned data length is in message field DataLength. |
| */ |
| unsigned int (*read_data_length)(char *, bool in_remaining); |
| /* map smb to linux error */ |
| int (*map_error)(char *, bool); |
| /* find mid corresponding to the response message */ |
| struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *); |
| void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info); |
| void (*clear_stats)(struct cifs_tcon *); |
| void (*print_stats)(struct seq_file *m, struct cifs_tcon *); |
| void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *); |
| /* verify the message */ |
| int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); |
| bool (*is_oplock_break)(char *, struct TCP_Server_Info *); |
| int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *); |
| void (*downgrade_oplock)(struct TCP_Server_Info *server, |
| struct cifsInodeInfo *cinode, __u32 oplock, |
| unsigned int epoch, bool *purge_cache); |
| /* process transaction2 response */ |
| bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, |
| char *, int); |
| /* check if we need to negotiate */ |
| bool (*need_neg)(struct TCP_Server_Info *); |
| /* negotiate to the server */ |
| int (*negotiate)(const unsigned int xid, |
| struct cifs_ses *ses, |
| struct TCP_Server_Info *server); |
| /* set negotiated write size */ |
| unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); |
| /* set negotiated read size */ |
| unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx); |
| /* setup smb sessionn */ |
| int (*sess_setup)(const unsigned int, struct cifs_ses *, |
| struct TCP_Server_Info *server, |
| const struct nls_table *); |
| /* close smb session */ |
| int (*logoff)(const unsigned int, struct cifs_ses *); |
| /* connect to a server share */ |
| int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *, |
| struct cifs_tcon *, const struct nls_table *); |
| /* close tree connecion */ |
| int (*tree_disconnect)(const unsigned int, struct cifs_tcon *); |
| /* get DFS referrals */ |
| int (*get_dfs_refer)(const unsigned int, struct cifs_ses *, |
| const char *, struct dfs_info3_param **, |
| unsigned int *, const struct nls_table *, int); |
| /* informational QFS call */ |
| void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, |
| struct cifs_sb_info *); |
| /* check if a path is accessible or not */ |
| int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, |
| struct cifs_sb_info *, const char *); |
| /* query path data from the server */ |
| int (*query_path_info)(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifs_sb_info *cifs_sb, const char *full_path, |
| struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse); |
| /* query file data from the server */ |
| int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifsFileInfo *cfile, struct cifs_open_info_data *data); |
| /* query reparse tag from srv to determine which type of special file */ |
| int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifs_sb_info *cifs_sb, const char *path, |
| __u32 *reparse_tag); |
| /* get server index number */ |
| int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, |
| struct cifs_open_info_data *data); |
| /* set size by path */ |
| int (*set_path_size)(const unsigned int, struct cifs_tcon *, |
| const char *, __u64, struct cifs_sb_info *, bool); |
| /* set size by file handle */ |
| int (*set_file_size)(const unsigned int, struct cifs_tcon *, |
| struct cifsFileInfo *, __u64, bool); |
| /* set attributes */ |
| int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, |
| const unsigned int); |
| int (*set_compression)(const unsigned int, struct cifs_tcon *, |
| struct cifsFileInfo *); |
| /* check if we can send an echo or nor */ |
| bool (*can_echo)(struct TCP_Server_Info *); |
| /* send echo request */ |
| int (*echo)(struct TCP_Server_Info *); |
| /* create directory */ |
| int (*posix_mkdir)(const unsigned int xid, struct inode *inode, |
| umode_t mode, struct cifs_tcon *tcon, |
| const char *full_path, |
| struct cifs_sb_info *cifs_sb); |
| int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, |
| struct cifs_tcon *tcon, const char *name, |
| struct cifs_sb_info *sb); |
| /* set info on created directory */ |
| void (*mkdir_setinfo)(struct inode *, const char *, |
| struct cifs_sb_info *, struct cifs_tcon *, |
| const unsigned int); |
| /* remove directory */ |
| int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, |
| struct cifs_sb_info *); |
| /* unlink file */ |
| int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, |
| struct cifs_sb_info *); |
| /* open, rename and delete file */ |
| int (*rename_pending_delete)(const char *, struct dentry *, |
| const unsigned int); |
| /* send rename request */ |
| int (*rename)(const unsigned int, struct cifs_tcon *, const char *, |
| const char *, struct cifs_sb_info *); |
| /* send create hardlink request */ |
| int (*create_hardlink)(const unsigned int, struct cifs_tcon *, |
| const char *, const char *, |
| struct cifs_sb_info *); |
| /* query symlink target */ |
| int (*query_symlink)(const unsigned int, struct cifs_tcon *, |
| struct cifs_sb_info *, const char *, |
| char **, bool); |
| /* open a file for non-posix mounts */ |
| int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, |
| void *buf); |
| /* set fid protocol-specific info */ |
| void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); |
| /* close a file */ |
| void (*close)(const unsigned int, struct cifs_tcon *, |
| struct cifs_fid *); |
| /* close a file, returning file attributes and timestamps */ |
| void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifsFileInfo *pfile_info); |
| /* send a flush request to the server */ |
| int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); |
| /* async read from the server */ |
| int (*async_readv)(struct cifs_readdata *); |
| /* async write to the server */ |
| int (*async_writev)(struct cifs_writedata *, |
| void (*release)(struct kref *)); |
| /* sync read from the server */ |
| int (*sync_read)(const unsigned int, struct cifs_fid *, |
| struct cifs_io_parms *, unsigned int *, char **, |
| int *); |
| /* sync write to the server */ |
| int (*sync_write)(const unsigned int, struct cifs_fid *, |
| struct cifs_io_parms *, unsigned int *, struct kvec *, |
| unsigned long); |
| /* open dir, start readdir */ |
| int (*query_dir_first)(const unsigned int, struct cifs_tcon *, |
| const char *, struct cifs_sb_info *, |
| struct cifs_fid *, __u16, |
| struct cifs_search_info *); |
| /* continue readdir */ |
| int (*query_dir_next)(const unsigned int, struct cifs_tcon *, |
| struct cifs_fid *, |
| __u16, struct cifs_search_info *srch_inf); |
| /* close dir */ |
| int (*close_dir)(const unsigned int, struct cifs_tcon *, |
| struct cifs_fid *); |
| /* calculate a size of SMB message */ |
| unsigned int (*calc_smb_size)(void *buf); |
| /* check for STATUS_PENDING and process the response if yes */ |
| bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server); |
| /* check for STATUS_NETWORK_SESSION_EXPIRED */ |
| bool (*is_session_expired)(char *); |
| /* send oplock break response */ |
| int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *, |
| struct cifsInodeInfo *); |
| /* query remote filesystem */ |
| int (*queryfs)(const unsigned int, struct cifs_tcon *, |
| struct cifs_sb_info *, struct kstatfs *); |
| /* send mandatory brlock to the server */ |
| int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, |
| __u64, __u32, int, int, bool); |
| /* unlock range of mandatory locks */ |
| int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, |
| const unsigned int); |
| /* push brlocks from the cache to the server */ |
| int (*push_mand_locks)(struct cifsFileInfo *); |
| /* get lease key of the inode */ |
| void (*get_lease_key)(struct inode *, struct cifs_fid *); |
| /* set lease key of the inode */ |
| void (*set_lease_key)(struct inode *, struct cifs_fid *); |
| /* generate new lease key */ |
| void (*new_lease_key)(struct cifs_fid *); |
| int (*generate_signingkey)(struct cifs_ses *ses, |
| struct TCP_Server_Info *server); |
| int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *, |
| bool allocate_crypto); |
| int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon, |
| struct cifsFileInfo *src_file); |
| int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, |
| struct cifsFileInfo *src_file, void __user *); |
| int (*notify)(const unsigned int xid, struct file *pfile, |
| void __user *pbuf, bool return_changes); |
| int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, |
| struct cifs_sb_info *, const unsigned char *, |
| char *, unsigned int *); |
| int (*create_mf_symlink)(unsigned int, struct cifs_tcon *, |
| struct cifs_sb_info *, const unsigned char *, |
| char *, unsigned int *); |
| /* if we can do cache read operations */ |
| bool (*is_read_op)(__u32); |
| /* set oplock level for the inode */ |
| void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int, |
| bool *); |
| /* create lease context buffer for CREATE request */ |
| char * (*create_lease_buf)(u8 *lease_key, u8 oplock); |
| /* parse lease context buffer and return oplock/epoch info */ |
| __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey); |
| ssize_t (*copychunk_range)(const unsigned int, |
| struct cifsFileInfo *src_file, |
| struct cifsFileInfo *target_file, |
| u64 src_off, u64 len, u64 dest_off); |
| int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, |
| struct cifsFileInfo *target_file, u64 src_off, u64 len, |
| u64 dest_off); |
| int (*validate_negotiate)(const unsigned int, struct cifs_tcon *); |
| ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *, |
| const unsigned char *, const unsigned char *, char *, |
| size_t, struct cifs_sb_info *); |
| int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *, |
| const char *, const void *, const __u16, |
| const struct nls_table *, struct cifs_sb_info *); |
| struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *, |
| const char *, u32 *, u32); |
| struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *, |
| const struct cifs_fid *, u32 *, u32); |
| int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *, |
| int); |
| /* writepages retry size */ |
| unsigned int (*wp_retry_size)(struct inode *); |
| /* get mtu credits */ |
| int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, |
| unsigned int *, struct cifs_credits *); |
| /* adjust previously taken mtu credits to request size */ |
| int (*adjust_credits)(struct TCP_Server_Info *server, |
| struct cifs_credits *credits, |
| const unsigned int payload_size); |
| /* check if we need to issue closedir */ |
| bool (*dir_needs_close)(struct cifsFileInfo *); |
| long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, |
| loff_t); |
| /* init transform request - used for encryption for now */ |
| int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst, |
| struct smb_rqst *, struct smb_rqst *); |
| int (*is_transform_hdr)(void *buf); |
| int (*receive_transform)(struct TCP_Server_Info *, |
| struct mid_q_entry **, char **, int *); |
| enum securityEnum (*select_sectype)(struct TCP_Server_Info *, |
| enum securityEnum); |
| int (*next_header)(char *); |
| /* ioctl passthrough for query_info */ |
| int (*ioctl_query_info)(const unsigned int xid, |
| struct cifs_tcon *tcon, |
| struct cifs_sb_info *cifs_sb, |
| __le16 *path, int is_dir, |
| unsigned long p); |
| /* make unix special files (block, char, fifo, socket) */ |
| int (*make_node)(unsigned int xid, |
| struct inode *inode, |
| struct dentry *dentry, |
| struct cifs_tcon *tcon, |
| const char *full_path, |
| umode_t mode, |
| dev_t device_number); |
| /* version specific fiemap implementation */ |
| int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *, |
| struct fiemap_extent_info *, u64, u64); |
| /* version specific llseek implementation */ |
| loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int); |
| /* Check for STATUS_IO_TIMEOUT */ |
| bool (*is_status_io_timeout)(char *buf); |
| /* Check for STATUS_NETWORK_NAME_DELETED */ |
| void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); |
| }; |
| |
| struct smb_version_values { |
| char *version_string; |
| __u16 protocol_id; |
| __u32 req_capabilities; |
| __u32 large_lock_type; |
| __u32 exclusive_lock_type; |
| __u32 shared_lock_type; |
| __u32 unlock_lock_type; |
| size_t header_preamble_size; |
| size_t header_size; |
| size_t max_header_size; |
| size_t read_rsp_size; |
| __le16 lock_cmd; |
| unsigned int cap_unix; |
| unsigned int cap_nt_find; |
| unsigned int cap_large_files; |
| __u16 signing_enabled; |
| __u16 signing_required; |
| size_t create_lease_size; |
| }; |
| |
| #define HEADER_SIZE(server) (server->vals->header_size) |
| #define MAX_HEADER_SIZE(server) (server->vals->max_header_size) |
| #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size) |
| #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server)) |
| |
| /** |
| * CIFS superblock mount flags (mnt_cifs_flags) to consider when |
| * trying to reuse existing superblock for a new mount |
| */ |
| #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \ |
| CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \ |
| CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \ |
| CIFS_MOUNT_MAP_SFM_CHR | \ |
| CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \ |
| CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \ |
| CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \ |
| CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \ |
| CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \ |
| CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ |
| CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ |
| CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ |
| CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ |
| CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) |
| |
| /** |
| * Generic VFS superblock mount flags (s_flags) to consider when |
| * trying to reuse existing superblock for a new mount |
| */ |
| #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \ |
| SB_NODEV | SB_SYNCHRONOUS) |
| |
| struct cifs_mnt_data { |
| struct cifs_sb_info *cifs_sb; |
| struct smb3_fs_context *ctx; |
| int flags; |
| }; |
| |
| static inline unsigned int |
| get_rfc1002_length(void *buf) |
| { |
| return be32_to_cpu(*((__be32 *)buf)) & 0xffffff; |
| } |
| |
| static inline void |
| inc_rfc1001_len(void *buf, int count) |
| { |
| be32_add_cpu((__be32 *)buf, count); |
| } |
| |
| struct TCP_Server_Info { |
| struct list_head tcp_ses_list; |
| struct list_head smb_ses_list; |
| spinlock_t srv_lock; /* protect anything here that is not protected */ |
| __u64 conn_id; /* connection identifier (useful for debugging) */ |
| int srv_count; /* reference counter */ |
| /* 15 character server name + 0x20 16th byte indicating type = srv */ |
| char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; |
| struct smb_version_operations *ops; |
| struct smb_version_values *vals; |
| /* updates to tcpStatus protected by cifs_tcp_ses_lock */ |
| enum statusEnum tcpStatus; /* what we think the status is */ |
| char *hostname; /* hostname portion of UNC string */ |
| struct socket *ssocket; |
| struct sockaddr_storage dstaddr; |
| struct sockaddr_storage srcaddr; /* locally bind to this IP */ |
| #ifdef CONFIG_NET_NS |
| struct net *net; |
| #endif |
| wait_queue_head_t response_q; |
| wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ |
| spinlock_t mid_lock; /* protect mid queue and it's entries */ |
| struct list_head pending_mid_q; |
| bool noblocksnd; /* use blocking sendmsg */ |
| bool noautotune; /* do not autotune send buf sizes */ |
| bool nosharesock; |
| bool tcp_nodelay; |
| unsigned int credits; /* send no more requests at once */ |
| unsigned int max_credits; /* can override large 32000 default at mnt */ |
| unsigned int in_flight; /* number of requests on the wire to server */ |
| unsigned int max_in_flight; /* max number of requests that were on wire */ |
| spinlock_t req_lock; /* protect the two values above */ |
| struct mutex _srv_mutex; |
| unsigned int nofs_flag; |
| struct task_struct *tsk; |
| char server_GUID[16]; |
| __u16 sec_mode; |
| bool sign; /* is signing enabled on this connection? */ |
| bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ |
| bool session_estab; /* mark when very first sess is established */ |
| int echo_credits; /* echo reserved slots */ |
| int oplock_credits; /* oplock break reserved slots */ |
| bool echoes:1; /* enable echoes */ |
| __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */ |
| u16 dialect; /* dialect index that server chose */ |
| bool oplocks:1; /* enable oplocks */ |
| unsigned int maxReq; /* Clients should submit no more */ |
| /* than maxReq distinct unanswered SMBs to the server when using */ |
| /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */ |
| unsigned int maxBuf; /* maxBuf specifies the maximum */ |
| /* message size the server can send or receive for non-raw SMBs */ |
| /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */ |
| /* when socket is setup (and during reconnect) before NegProt sent */ |
| unsigned int max_rw; /* maxRw specifies the maximum */ |
| /* message size the server can send or receive for */ |
| /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ |
| unsigned int capabilities; /* selective disabling of caps by smb sess */ |
| int timeAdj; /* Adjust for difference in server time zone in sec */ |
| __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */ |
| char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ |
| /* 16th byte of RFC1001 workstation name is always null */ |
| char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; |
| __u32 sequence_number; /* for signing, protected by srv_mutex */ |
| __u32 reconnect_instance; /* incremented on each reconnect */ |
| struct session_key session_key; |
| unsigned long lstrp; /* when we got last response from this server */ |
| struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ |
| #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */ |
| #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */ |
| char negflavor; /* NEGOTIATE response flavor */ |
| /* extended security flavors that server supports */ |
| bool sec_ntlmssp; /* supports NTLMSSP */ |
| bool sec_kerberosu2u; /* supports U2U Kerberos */ |
| bool sec_kerberos; /* supports plain Kerberos */ |
| bool sec_mskerberos; /* supports legacy MS Kerberos */ |
| bool large_buf; /* is current buffer large? */ |
| /* use SMBD connection instead of socket */ |
| bool rdma; |
| /* point to the SMBD connection if RDMA is used instead of socket */ |
| struct smbd_connection *smbd_conn; |
| struct delayed_work echo; /* echo ping workqueue job */ |
| char *smallbuf; /* pointer to current "small" buffer */ |
| char *bigbuf; /* pointer to current "big" buffer */ |
| /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ |
| unsigned int pdu_size; |
| unsigned int total_read; /* total amount of data read in this pass */ |
| atomic_t in_send; /* requests trying to send */ |
| atomic_t num_waiters; /* blocked waiting to get in sendrecv */ |
| #ifdef CONFIG_CIFS_STATS2 |
| atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ |
| atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ |
| __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ |
| __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS]; |
| __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS]; |
| #endif /* STATS2 */ |
| unsigned int max_read; |
| unsigned int max_write; |
| unsigned int min_offload; |
| __le16 compress_algorithm; |
| __u16 signing_algorithm; |
| __le16 cipher_type; |
| /* save initital negprot hash */ |
| __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; |
| bool signing_negotiated; /* true if valid signing context rcvd from server */ |
| bool posix_ext_supported; |
| struct delayed_work reconnect; /* reconnect workqueue job */ |
| struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ |
| unsigned long echo_interval; |
| |
| /* |
| * Number of targets available for reconnect. The more targets |
| * the more tasks have to wait to let the demultiplex thread |
| * reconnect. |
| */ |
| int nr_targets; |
| bool noblockcnt; /* use non-blocking connect() */ |
| |
| /* |
| * If this is a session channel, |
| * primary_server holds the ref-counted |
| * pointer to primary channel connection for the session. |
| */ |
| #define CIFS_SERVER_IS_CHAN(server) (!!(server)->primary_server) |
| struct TCP_Server_Info *primary_server; |
| |
| #ifdef CONFIG_CIFS_SWN_UPCALL |
| bool use_swn_dstaddr; |
| struct sockaddr_storage swn_dstaddr; |
| #endif |
| struct mutex refpath_lock; /* protects leaf_fullpath */ |
| /* |
| * Canonical DFS full paths that were used to chase referrals in mount and reconnect. |
| * |
| * origin_fullpath: first or original referral path |
| * leaf_fullpath: last referral path (might be changed due to nested links in reconnect) |
| * |
| * current_fullpath: pointer to either origin_fullpath or leaf_fullpath |
| * NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect() |
| * |
| * format: \\HOST\SHARE\[OPTIONAL PATH] |
| */ |
| char *origin_fullpath, *leaf_fullpath, *current_fullpath; |
| }; |
| |
| static inline bool is_smb1(struct TCP_Server_Info *server) |
| { |
| return HEADER_PREAMBLE_SIZE(server) != 0; |
| } |
| |
| static inline void cifs_server_lock(struct TCP_Server_Info *server) |
| { |
| unsigned int nofs_flag = memalloc_nofs_save(); |
| |
| mutex_lock(&server->_srv_mutex); |
| server->nofs_flag = nofs_flag; |
| } |
| |
| static inline void cifs_server_unlock(struct TCP_Server_Info *server) |
| { |
| unsigned int nofs_flag = server->nofs_flag; |
| |
| mutex_unlock(&server->_srv_mutex); |
| memalloc_nofs_restore(nofs_flag); |
| } |
| |
| struct cifs_credits { |
| unsigned int value; |
| unsigned int instance; |
| }; |
| |
| static inline unsigned int |
| in_flight(struct TCP_Server_Info *server) |
| { |
| unsigned int num; |
| |
| spin_lock(&server->req_lock); |
| num = server->in_flight; |
| spin_unlock(&server->req_lock); |
| return num; |
| } |
| |
| static inline bool |
| has_credits(struct TCP_Server_Info *server, int *credits, int num_credits) |
| { |
| int num; |
| |
| spin_lock(&server->req_lock); |
| num = *credits; |
| spin_unlock(&server->req_lock); |
| return num >= num_credits; |
| } |
| |
| static inline void |
| add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits, |
| const int optype) |
| { |
| server->ops->add_credits(server, credits, optype); |
| } |
| |
| static inline void |
| add_credits_and_wake_if(struct TCP_Server_Info *server, |
| const struct cifs_credits *credits, const int optype) |
| { |
| if (credits->value) { |
| server->ops->add_credits(server, credits, optype); |
| wake_up(&server->request_q); |
| } |
| } |
| |
| static inline void |
| set_credits(struct TCP_Server_Info *server, const int val) |
| { |
| server->ops->set_credits(server, val); |
| } |
| |
| static inline int |
| adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, |
| const unsigned int payload_size) |
| { |
| return server->ops->adjust_credits ? |
| server->ops->adjust_credits(server, credits, payload_size) : 0; |
| } |
| |
| static inline __le64 |
| get_next_mid64(struct TCP_Server_Info *server) |
| { |
| return cpu_to_le64(server->ops->get_next_mid(server)); |
| } |
| |
| static inline __le16 |
| get_next_mid(struct TCP_Server_Info *server) |
| { |
| __u16 mid = server->ops->get_next_mid(server); |
| /* |
| * The value in the SMB header should be little endian for easy |
| * on-the-wire decoding. |
| */ |
| return cpu_to_le16(mid); |
| } |
| |
| static inline void |
| revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) |
| { |
| if (server->ops->revert_current_mid) |
| server->ops->revert_current_mid(server, val); |
| } |
| |
| static inline void |
| revert_current_mid_from_hdr(struct TCP_Server_Info *server, |
| const struct smb2_hdr *shdr) |
| { |
| unsigned int num = le16_to_cpu(shdr->CreditCharge); |
| |
| return revert_current_mid(server, num > 0 ? num : 1); |
| } |
| |
| static inline __u16 |
| get_mid(const struct smb_hdr *smb) |
| { |
| return le16_to_cpu(smb->Mid); |
| } |
| |
| static inline bool |
| compare_mid(__u16 mid, const struct smb_hdr *smb) |
| { |
| return mid == le16_to_cpu(smb->Mid); |
| } |
| |
| /* |
| * When the server supports very large reads and writes via POSIX extensions, |
| * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not |
| * including the RFC1001 length. |
| * |
| * Note that this might make for "interesting" allocation problems during |
| * writeback however as we have to allocate an array of pointers for the |
| * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096. |
| * |
| * For reads, there is a similar problem as we need to allocate an array |
| * of kvecs to handle the receive, though that should only need to be done |
| * once. |
| */ |
| #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
| #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
| |
| /* |
| * When the server doesn't allow large posix writes, only allow a rsize/wsize |
| * of 2^17-1 minus the size of the call header. That allows for a read or |
| * write up to the maximum size described by RFC1002. |
| */ |
| #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
| #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
| |
| #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
| |
| /* |
| * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
| * those values when posix extensions aren't in force. In actuality here, we |
| * use 65536 to allow for a write that is a multiple of 4k. Most servers seem |
| * to be ok with the extra byte even though Windows doesn't send writes that |
| * are that large. |
| * |
| * Citation: |
| * |
| * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx |
| */ |
| #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) |
| #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
| |
| /* |
| * Macros to allow the TCP_Server_Info->net field and related code to drop out |
| * when CONFIG_NET_NS isn't set. |
| */ |
| |
| #ifdef CONFIG_NET_NS |
| |
| static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) |
| { |
| return srv->net; |
| } |
| |
| static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) |
| { |
| srv->net = net; |
| } |
| |
| #else |
| |
| static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) |
| { |
| return &init_net; |
| } |
| |
| static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net) |
| { |
| } |
| |
| #endif |
| |
| struct cifs_server_iface { |
| struct list_head iface_head; |
| struct kref refcount; |
| size_t speed; |
| unsigned int rdma_capable : 1; |
| unsigned int rss_capable : 1; |
| unsigned int is_active : 1; /* unset if non existent */ |
| struct sockaddr_storage sockaddr; |
| }; |
| |
| /* release iface when last ref is dropped */ |
| static inline void |
| release_iface(struct kref *ref) |
| { |
| struct cifs_server_iface *iface = container_of(ref, |
| struct cifs_server_iface, |
| refcount); |
| list_del_init(&iface->iface_head); |
| kfree(iface); |
| } |
| |
| /* |
| * compare two interfaces a and b |
| * return 0 if everything matches. |
| * return 1 if a has higher link speed, or rdma capable, or rss capable |
| * return -1 otherwise. |
| */ |
| static inline int |
| iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) |
| { |
| int cmp_ret = 0; |
| |
| WARN_ON(!a || !b); |
| if (a->speed == b->speed) { |
| if (a->rdma_capable == b->rdma_capable) { |
| if (a->rss_capable == b->rss_capable) { |
| cmp_ret = memcmp(&a->sockaddr, &b->sockaddr, |
| sizeof(a->sockaddr)); |
| if (!cmp_ret) |
| return 0; |
| else if (cmp_ret > 0) |
| return 1; |
| else |
| return -1; |
| } else if (a->rss_capable > b->rss_capable) |
| return 1; |
| else |
| return -1; |
| } else if (a->rdma_capable > b->rdma_capable) |
| return 1; |
| else |
| return -1; |
| } else if (a->speed > b->speed) |
| return 1; |
| else |
| return -1; |
| } |
| |
| struct cifs_chan { |
| unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ |
| struct TCP_Server_Info *server; |
| struct cifs_server_iface *iface; /* interface in use */ |
| __u8 signkey[SMB3_SIGN_KEY_SIZE]; |
| }; |
| |
| /* |
| * Session structure. One of these for each uid session with a particular host |
| */ |
| struct cifs_ses { |
| struct list_head smb_ses_list; |
| struct list_head rlist; /* reconnect list */ |
| struct list_head tcon_list; |
| struct cifs_tcon *tcon_ipc; |
| spinlock_t ses_lock; /* protect anything here that is not protected */ |
| struct mutex session_mutex; |
| struct TCP_Server_Info *server; /* pointer to server info */ |
| int ses_count; /* reference counter */ |
| enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */ |
| unsigned int overrideSecFlg; /* if non-zero override global sec flags */ |
| char *serverOS; /* name of operating system underlying server */ |
| char *serverNOS; /* name of network operating system of server */ |
| char *serverDomain; /* security realm of server */ |
| __u64 Suid; /* remote smb uid */ |
| kuid_t linux_uid; /* overriding owner of files on the mount */ |
| kuid_t cred_uid; /* owner of credentials */ |
| unsigned int capabilities; |
| char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */ |
| char *user_name; /* must not be null except during init of sess |
| and after mount option parsing we fill it */ |
| char *domainName; |
| char *password; |
| char workstation_name[CIFS_MAX_WORKSTATION_LEN]; |
| struct session_key auth_key; |
| struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ |
| enum securityEnum sectype; /* what security flavor was specified? */ |
| bool sign; /* is signing required? */ |
| bool domainAuto:1; |
| __u16 session_flags; |
| __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; |
| __u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE]; |
| __u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE]; |
| __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; |
| |
| /* |
| * Network interfaces available on the server this session is |
| * connected to. |
| * |
| * Other channels can be opened by connecting and binding this |
| * session to interfaces from this list. |
| * |
| * iface_lock should be taken when accessing any of these fields |
| */ |
| spinlock_t iface_lock; |
| /* ========= begin: protected by iface_lock ======== */ |
| struct list_head iface_list; |
| size_t iface_count; |
| unsigned long iface_last_update; /* jiffies */ |
| /* ========= end: protected by iface_lock ======== */ |
| |
| spinlock_t chan_lock; |
| /* ========= begin: protected by chan_lock ======== */ |
| #define CIFS_MAX_CHANNELS 16 |
| #define CIFS_ALL_CHANNELS_SET(ses) \ |
| ((1UL << (ses)->chan_count) - 1) |
| #define CIFS_ALL_CHANS_GOOD(ses) \ |
| (!(ses)->chans_need_reconnect) |
| #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ |
| ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) |
| #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ |
| ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) |
| #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ |
| test_bit((index), &(ses)->chans_need_reconnect) |
| #define CIFS_CHAN_IN_RECONNECT(ses, index) \ |
| ((ses)->chans[(index)].in_reconnect) |
| |
| struct cifs_chan chans[CIFS_MAX_CHANNELS]; |
| size_t chan_count; |
| size_t chan_max; |
| atomic_t chan_seq; /* round robin state */ |
| |
| /* |
| * chans_need_reconnect is a bitmap indicating which of the channels |
| * under this smb session needs to be reconnected. |
| * If not multichannel session, only one bit will be used. |
| * |
| * We will ask for sess and tcon reconnection only if all the |
| * channels are marked for needing reconnection. This will |
| * enable the sessions on top to continue to live till any |
| * of the channels below are active. |
| */ |
| unsigned long chans_need_reconnect; |
| /* ========= end: protected by chan_lock ======== */ |
| struct cifs_ses *dfs_root_ses; |
| }; |
| |
| static inline bool |
| cap_unix(struct cifs_ses *ses) |
| { |
| return ses->server->vals->cap_unix & ses->capabilities; |
| } |
| |
| /* |
| * common struct for holding inode info when searching for or updating an |
| * inode with new info |
| */ |
| |
| #define CIFS_FATTR_DFS_REFERRAL 0x1 |
| #define CIFS_FATTR_DELETE_PENDING 0x2 |
| #define CIFS_FATTR_NEED_REVAL 0x4 |
| #define CIFS_FATTR_INO_COLLISION 0x8 |
| #define CIFS_FATTR_UNKNOWN_NLINK 0x10 |
| #define CIFS_FATTR_FAKE_ROOT_INO 0x20 |
| |
| struct cifs_fattr { |
| u32 cf_flags; |
| u32 cf_cifsattrs; |
| u64 cf_uniqueid; |
| u64 cf_eof; |
| u64 cf_bytes; |
| u64 cf_createtime; |
| kuid_t cf_uid; |
| kgid_t cf_gid; |
| umode_t cf_mode; |
| dev_t cf_rdev; |
| unsigned int cf_nlink; |
| unsigned int cf_dtype; |
| struct timespec64 cf_atime; |
| struct timespec64 cf_mtime; |
| struct timespec64 cf_ctime; |
| u32 cf_cifstag; |
| char *cf_symlink_target; |
| }; |
| |
| /* |
| * there is one of these for each connection to a resource on a particular |
| * session |
| */ |
| struct cifs_tcon { |
| struct list_head tcon_list; |
| int tc_count; |
| struct list_head rlist; /* reconnect list */ |
| spinlock_t tc_lock; /* protect anything here that is not protected */ |
| atomic_t num_local_opens; /* num of all opens including disconnected */ |
| atomic_t num_remote_opens; /* num of all network opens on server */ |
| struct list_head openFileList; |
| spinlock_t open_file_lock; /* protects list above */ |
| struct cifs_ses *ses; /* pointer to session associated with */ |
| char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ |
| char *nativeFileSystem; |
| char *password; /* for share-level security */ |
| __u32 tid; /* The 4 byte tree id */ |
| __u16 Flags; /* optional support bits */ |
| enum tid_status_enum status; |
| atomic_t num_smbs_sent; |
| union { |
| struct { |
| atomic_t num_writes; |
| atomic_t num_reads; |
| atomic_t num_flushes; |
| atomic_t num_oplock_brks; |
| atomic_t num_opens; |
| atomic_t num_closes; |
| atomic_t num_deletes; |
| atomic_t num_mkdirs; |
| atomic_t num_posixopens; |
| atomic_t num_posixmkdirs; |
| atomic_t num_rmdirs; |
| atomic_t num_renames; |
| atomic_t num_t2renames; |
| atomic_t num_ffirst; |
| atomic_t num_fnext; |
| atomic_t num_fclose; |
| atomic_t num_hardlinks; |
| atomic_t num_symlinks; |
| atomic_t num_locks; |
| atomic_t num_acl_get; |
| atomic_t num_acl_set; |
| } cifs_stats; |
| struct { |
| atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS]; |
| atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS]; |
| } smb2_stats; |
| } stats; |
| __u64 bytes_read; |
| __u64 bytes_written; |
| spinlock_t stat_lock; /* protects the two fields above */ |
| FILE_SYSTEM_DEVICE_INFO fsDevInfo; |
| FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ |
| FILE_SYSTEM_UNIX_INFO fsUnixInfo; |
| bool ipc:1; /* set if connection to IPC$ share (always also pipe) */ |
| bool pipe:1; /* set if connection to pipe share */ |
| bool print:1; /* set if connection to printer share */ |
| bool retry:1; |
| bool nocase:1; |
| bool nohandlecache:1; /* if strange server resource prob can turn off */ |
| bool nodelete:1; |
| bool seal:1; /* transport encryption for this mounted share */ |
| bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol |
| for this mount even if server would support */ |
| bool posix_extensions; /* if true SMB3.11 posix extensions enabled */ |
| bool local_lease:1; /* check leases (only) on local system not remote */ |
| bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */ |
| bool broken_sparse_sup; /* if server or share does not support sparse */ |
| bool need_reconnect:1; /* connection reset, tid now invalid */ |
| bool need_reopen_files:1; /* need to reopen tcon file handles */ |
| bool use_resilient:1; /* use resilient instead of durable handles */ |
| bool use_persistent:1; /* use persistent instead of durable handles */ |
| bool no_lease:1; /* Do not request leases on files or directories */ |
| bool use_witness:1; /* use witness protocol */ |
| __le32 capabilities; |
| __u32 share_flags; |
| __u32 maximal_access; |
| __u32 vol_serial_number; |
| __le64 vol_create_time; |
| __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */ |
| __u32 handle_timeout; /* persistent and durable handle timeout in ms */ |
| __u32 ss_flags; /* sector size flags */ |
| __u32 perf_sector_size; /* best sector size for perf */ |
| __u32 max_chunks; |
| __u32 max_bytes_chunk; |
| __u32 max_bytes_copy; |
| #ifdef CONFIG_CIFS_FSCACHE |
| u64 resource_id; /* server resource id */ |
| struct fscache_volume *fscache; /* cookie for share */ |
| #endif |
| struct list_head pending_opens; /* list of incomplete opens */ |
| struct cached_fids *cfids; |
| /* BB add field for back pointer to sb struct(s)? */ |
| #ifdef CONFIG_CIFS_DFS_UPCALL |
| struct list_head ulist; /* cache update list */ |
| struct list_head dfs_ses_list; |
| #endif |
| struct delayed_work query_interfaces; /* query interfaces workqueue job */ |
| }; |
| |
| /* |
| * This is a refcounted and timestamped container for a tcon pointer. The |
| * container holds a tcon reference. It is considered safe to free one of |
| * these when the tl_count goes to 0. The tl_time is the time of the last |
| * "get" on the container. |
| */ |
| struct tcon_link { |
| struct rb_node tl_rbnode; |
| kuid_t tl_uid; |
| unsigned long tl_flags; |
| #define TCON_LINK_MASTER 0 |
| #define TCON_LINK_PENDING 1 |
| #define TCON_LINK_IN_TREE 2 |
| unsigned long tl_time; |
| atomic_t tl_count; |
| struct cifs_tcon *tl_tcon; |
| }; |
| |
| extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb); |
| extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst); |
| |
| static inline struct cifs_tcon * |
| tlink_tcon(struct tcon_link *tlink) |
| { |
| return tlink->tl_tcon; |
| } |
| |
| static inline struct tcon_link * |
| cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
| { |
| return cifs_sb->master_tlink; |
| } |
| |
| extern void cifs_put_tlink(struct tcon_link *tlink); |
| |
| static inline struct tcon_link * |
| cifs_get_tlink(struct tcon_link *tlink) |
| { |
| if (tlink && !IS_ERR(tlink)) |
| atomic_inc(&tlink->tl_count); |
| return tlink; |
| } |
| |
| /* This function is always expected to succeed */ |
| extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); |
| |
| #define CIFS_OPLOCK_NO_CHANGE 0xfe |
| |
| struct cifs_pending_open { |
| struct list_head olist; |
| struct tcon_link *tlink; |
| __u8 lease_key[16]; |
| __u32 oplock; |
| }; |
| |
| struct cifs_deferred_close { |
| struct list_head dlist; |
| struct tcon_link *tlink; |
| __u16 netfid; |
| __u64 persistent_fid; |
| __u64 volatile_fid; |
| }; |
| |
| /* |
| * This info hangs off the cifsFileInfo structure, pointed to by llist. |
| * This is used to track byte stream locks on the file |
| */ |
| struct cifsLockInfo { |
| struct list_head llist; /* pointer to next cifsLockInfo */ |
| struct list_head blist; /* pointer to locks blocked on this */ |
| wait_queue_head_t block_q; |
| __u64 offset; |
| __u64 length; |
| __u32 pid; |
| __u16 type; |
| __u16 flags; |
| }; |
| |
| /* |
| * One of these for each open instance of a file |
| */ |
| struct cifs_search_info { |
| loff_t index_of_last_entry; |
| __u16 entries_in_buffer; |
| __u16 info_level; |
| __u32 resume_key; |
| char *ntwrk_buf_start; |
| char *srch_entries_start; |
| char *last_entry; |
| const char *presume_name; |
| unsigned int resume_name_len; |
| bool endOfSearch:1; |
| bool emptyDir:1; |
| bool unicode:1; |
| bool smallBuf:1; /* so we know which buf_release function to call */ |
| }; |
| |
| #define ACL_NO_MODE ((umode_t)(-1)) |
| struct cifs_open_parms { |
| struct cifs_tcon *tcon; |
| struct cifs_sb_info *cifs_sb; |
| int disposition; |
| int desired_access; |
| int create_options; |
| const char *path; |
| struct cifs_fid *fid; |
| umode_t mode; |
| bool reconnect:1; |
| }; |
| |
| struct cifs_fid { |
| __u16 netfid; |
| __u64 persistent_fid; /* persist file id for smb2 */ |
| __u64 volatile_fid; /* volatile file id for smb2 */ |
| __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ |
| __u8 create_guid[16]; |
| __u32 access; |
| struct cifs_pending_open *pending_open; |
| unsigned int epoch; |
| #ifdef CONFIG_CIFS_DEBUG2 |
| __u64 mid; |
| #endif /* CIFS_DEBUG2 */ |
| bool purge_cache; |
| }; |
| |
| struct cifs_fid_locks { |
| struct list_head llist; |
| struct cifsFileInfo *cfile; /* fid that owns locks */ |
| struct list_head locks; /* locks held by fid above */ |
| }; |
| |
| struct cifsFileInfo { |
| /* following two lists are protected by tcon->open_file_lock */ |
| struct list_head tlist; /* pointer to next fid owned by tcon */ |
| struct list_head flist; /* next fid (file instance) for this inode */ |
| /* lock list below protected by cifsi->lock_sem */ |
| struct cifs_fid_locks *llist; /* brlocks held by this fid */ |
| kuid_t uid; /* allows finding which FileInfo structure */ |
| __u32 pid; /* process id who opened file */ |
| struct cifs_fid fid; /* file id from remote */ |
| struct list_head rlist; /* reconnect list */ |
| /* BB add lock scope info here if needed */ |
| /* lock scope id (0 if none) */ |
| struct dentry *dentry; |
| struct tcon_link *tlink; |
| unsigned int f_flags; |
| bool invalidHandle:1; /* file closed via session abend */ |
| bool swapfile:1; |
| bool oplock_break_cancelled:1; |
| unsigned int oplock_epoch; /* epoch from the lease break */ |
| __u32 oplock_level; /* oplock/lease level from the lease break */ |
| int count; |
| spinlock_t file_info_lock; /* protects four flag/count fields above */ |
| struct mutex fh_mutex; /* prevents reopen race after dead ses*/ |
| struct cifs_search_info srch_inf; |
| struct work_struct oplock_break; /* work for oplock breaks */ |
| struct work_struct put; /* work for the final part of _put */ |
| struct delayed_work deferred; |
| bool deferred_close_scheduled; /* Flag to indicate close is scheduled */ |
| char *symlink_target; |
| }; |
| |
| struct cifs_io_parms { |
| __u16 netfid; |
| __u64 persistent_fid; /* persist file id for smb2 */ |
| __u64 volatile_fid; /* volatile file id for smb2 */ |
| __u32 pid; |
| __u64 offset; |
| unsigned int length; |
| struct cifs_tcon *tcon; |
| struct TCP_Server_Info *server; |
| }; |
| |
| struct cifs_aio_ctx { |
| struct kref refcount; |
| struct list_head list; |
| struct mutex aio_mutex; |
| struct completion done; |
| struct iov_iter iter; |
| struct kiocb *iocb; |
| struct cifsFileInfo *cfile; |
| struct bio_vec *bv; |
| loff_t pos; |
| unsigned int nr_pinned_pages; |
| ssize_t rc; |
| unsigned int len; |
| unsigned int total_len; |
| unsigned int bv_need_unpin; /* If ->bv[] needs unpinning */ |
| bool should_dirty; |
| /* |
| * Indicates if this aio_ctx is for direct_io, |
| * If yes, iter is a copy of the user passed iov_iter |
| */ |
| bool direct_io; |
| }; |
| |
| /* asynchronous read support */ |
| struct cifs_readdata { |
| struct kref refcount; |
| struct list_head list; |
| struct completion done; |
| struct cifsFileInfo *cfile; |
| struct address_space *mapping; |
| struct cifs_aio_ctx *ctx; |
| __u64 offset; |
| ssize_t got_bytes; |
| unsigned int bytes; |
| pid_t pid; |
| int result; |
| struct work_struct work; |
| struct iov_iter iter; |
| struct kvec iov[2]; |
| struct TCP_Server_Info *server; |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| struct smbd_mr *mr; |
| #endif |
| struct cifs_credits credits; |
| }; |
| |
| /* asynchronous write support */ |
| struct cifs_writedata { |
| struct kref refcount; |
| struct list_head list; |
| struct completion done; |
| enum writeback_sync_modes sync_mode; |
| struct work_struct work; |
| struct cifsFileInfo *cfile; |
| struct cifs_aio_ctx *ctx; |
| struct iov_iter iter; |
| struct bio_vec *bv; |
| __u64 offset; |
| pid_t pid; |
| unsigned int bytes; |
| int result; |
| struct TCP_Server_Info *server; |
| #ifdef CONFIG_CIFS_SMB_DIRECT |
| struct smbd_mr *mr; |
| #endif |
| struct cifs_credits credits; |
| }; |
| |
| /* |
| * Take a reference on the file private data. Must be called with |
| * cfile->file_info_lock held. |
| */ |
| static inline void |
| cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) |
| { |
| ++cifs_file->count; |
| } |
| |
| struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); |
| void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, |
| bool offload); |
| void cifsFileInfo_put(struct cifsFileInfo *cifs_file); |
| |
| #define CIFS_CACHE_READ_FLG 1 |
| #define CIFS_CACHE_HANDLE_FLG 2 |
| #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG) |
| #define CIFS_CACHE_WRITE_FLG 4 |
| #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) |
| #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) |
| |
| #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)) |
| #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) |
| #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)) |
| |
| /* |
| * One of these for each file inode |
| */ |
| |
| struct cifsInodeInfo { |
| struct netfs_inode netfs; /* Netfslib context and vfs inode */ |
| bool can_cache_brlcks; |
| struct list_head llist; /* locks helb by this inode */ |
| /* |
| * NOTE: Some code paths call down_read(lock_sem) twice, so |
| * we must always use cifs_down_write() instead of down_write() |
| * for this semaphore to avoid deadlocks. |
| */ |
| struct rw_semaphore lock_sem; /* protect the fields above */ |
| /* BB add in lists for dirty pages i.e. write caching info for oplock */ |
| struct list_head openFileList; |
| spinlock_t open_file_lock; /* protects openFileList */ |
| __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ |
| unsigned int oplock; /* oplock/lease level we have */ |
| unsigned int epoch; /* used to track lease state changes */ |
| #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ |
| #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ |
| #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ |
| #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ |
| #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ |
| #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ |
| #define CIFS_INO_MODIFIED_ATTR (6) /* Indicate change in mtime/ctime */ |
| #define CIFS_INO_CLOSE_ON_LOCK (7) /* Not to defer the close when lock is set */ |
| unsigned long flags; |
| spinlock_t writers_lock; |
| unsigned int writers; /* Number of writers on this inode */ |
| unsigned long time; /* jiffies of last update of inode */ |
| u64 server_eof; /* current file size on server -- protected by i_lock */ |
| u64 uniqueid; /* server inode number */ |
| u64 createtime; /* creation time on server */ |
| __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ |
| struct list_head deferred_closes; /* list of deferred closes */ |
| spinlock_t deferred_lock; /* protection on deferred list */ |
| bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */ |
| char *symlink_target; |
| }; |
| |
| static inline struct cifsInodeInfo * |
| CIFS_I(struct inode *inode) |
| { |
| return container_of(inode, struct cifsInodeInfo, netfs.inode); |
| } |
| |
| static inline struct cifs_sb_info * |
| CIFS_SB(struct super_block *sb) |
| { |
| return sb->s_fs_info; |
| } |
| |
| static inline struct cifs_sb_info * |
| CIFS_FILE_SB(struct file *file) |
| { |
| return CIFS_SB(file_inode(file)->i_sb); |
| } |
| |
| static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) |
| { |
| if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
| return '/'; |
| else |
| return '\\'; |
| } |
| |
| static inline void |
| convert_delimiter(char *path, char delim) |
| { |
| char old_delim, *pos; |
| |
| if (delim == '/') |
| old_delim = '\\'; |
| else |
| old_delim = '/'; |
| |
| pos = path; |
| while ((pos = strchr(pos, old_delim))) |
| *pos = delim; |
| } |
| |
| #define cifs_stats_inc atomic_inc |
| |
| static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon, |
| unsigned int bytes) |
| { |
| if (bytes) { |
| spin_lock(&tcon->stat_lock); |
| tcon->bytes_written += bytes; |
| spin_unlock(&tcon->stat_lock); |
| } |
| } |
| |
| static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, |
| unsigned int bytes) |
| { |
| spin_lock(&tcon->stat_lock); |
| tcon->bytes_read += bytes; |
| spin_unlock(&tcon->stat_lock); |
| } |
| |
| |
| /* |
| * This is the prototype for the mid receive function. This function is for |
| * receiving the rest of the SMB frame, starting with the WordCount (which is |
| * just after the MID in struct smb_hdr). Note: |
| * |
| * - This will be called by cifsd, with no locks held. |
| * - The mid will still be on the pending_mid_q. |
| * - mid->resp_buf will point to the current buffer. |
| * |
| * Returns zero on a successful receive, or an error. The receive state in |
| * the TCP_Server_Info will also be updated. |
| */ |
| typedef int (mid_receive_t)(struct TCP_Server_Info *server, |
| struct mid_q_entry *mid); |
| |
| /* |
| * This is the prototype for the mid callback function. This is called once the |
| * mid has been received off of the socket. When creating one, take special |
| * care to avoid deadlocks. Things to bear in mind: |
| * |
| * - it will be called by cifsd, with no locks held |
| * - the mid will be removed from any lists |
| */ |
| typedef void (mid_callback_t)(struct mid_q_entry *mid); |
| |
| /* |
| * This is the protopyte for mid handle function. This is called once the mid |
| * has been recognized after decryption of the message. |
| */ |
| typedef int (mid_handle_t)(struct TCP_Server_Info *server, |
| struct mid_q_entry *mid); |
| |
| /* one of these for every pending CIFS request to the server */ |
| struct mid_q_entry { |
| struct list_head qhead; /* mids waiting on reply from this server */ |
| struct kref refcount; |
| struct TCP_Server_Info *server; /* server corresponding to this mid */ |
| __u64 mid; /* multiplex id */ |
| __u16 credits; /* number of credits consumed by this mid */ |
| __u16 credits_received; /* number of credits from the response */ |
| __u32 pid; /* process id */ |
| __u32 sequence_number; /* for CIFS signing */ |
| unsigned long when_alloc; /* when mid was created */ |
| #ifdef CONFIG_CIFS_STATS2 |
| unsigned long when_sent; /* time when smb send finished */ |
| unsigned long when_received; /* when demux complete (taken off wire) */ |
| #endif |
| mid_receive_t *receive; /* call receive callback */ |
| mid_callback_t *callback; /* call completion callback */ |
| mid_handle_t *handle; /* call handle mid callback */ |
| void *callback_data; /* general purpose pointer for callback */ |
| struct task_struct *creator; |
| void *resp_buf; /* pointer to received SMB header */ |
| unsigned int resp_buf_size; |
| int mid_state; /* wish this were enum but can not pass to wait_event */ |
| unsigned int mid_flags; |
| __le16 command; /* smb command code */ |
| unsigned int optype; /* operation type */ |
| bool large_buf:1; /* if valid response, is pointer to large buf */ |
| bool multiRsp:1; /* multiple trans2 responses for one request */ |
| bool multiEnd:1; /* both received */ |
| bool decrypted:1; /* decrypted entry */ |
| }; |
| |
| struct close_cancelled_open { |
| struct cifs_fid fid; |
| struct cifs_tcon *tcon; |
| struct work_struct work; |
| __u64 mid; |
| __u16 cmd; |
| }; |
| |
| /* Make code in transport.c a little cleaner by moving |
| update of optional stats into function below */ |
| static inline void cifs_in_send_inc(struct TCP_Server_Info *server) |
| { |
| atomic_inc(&server->in_send); |
| } |
| |
| static inline void cifs_in_send_dec(struct TCP_Server_Info *server) |
| { |
| atomic_dec(&server->in_send); |
| } |
| |
| static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) |
| { |
| atomic_inc(&server->num_waiters); |
| } |
| |
| static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) |
| { |
| atomic_dec(&server->num_waiters); |
| } |
| |
| #ifdef CONFIG_CIFS_STATS2 |
| static inline void cifs_save_when_sent(struct mid_q_entry *mid) |
| { |
| mid->when_sent = jiffies; |
| } |
| #else |
| static inline void cifs_save_when_sent(struct mid_q_entry *mid) |
| { |
| } |
| #endif |
| |
| /* for pending dnotify requests */ |
| struct dir_notify_req { |
| struct list_head lhead; |
| __le16 Pid; |
| __le16 PidHigh; |
| __u16 Mid; |
| __u16 Tid; |
| __u16 Uid; |
| __u16 netfid; |
| __u32 filter; /* CompletionFilter (for multishot) */ |
| int multishot; |
| struct file *pfile; |
| }; |
| |
| struct dfs_info3_param { |
| int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/ |
| int path_consumed; |
| int server_type; |
| int ref_flag; |
| char *path_name; |
| char *node_name; |
| int ttl; |
| }; |
| |
| struct file_list { |
| struct list_head list; |
| struct cifsFileInfo *cfile; |
| }; |
| |
| struct cifs_mount_ctx { |
| struct cifs_sb_info *cifs_sb; |
| struct smb3_fs_context *fs_ctx; |
| unsigned int xid; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses; |
| struct cifs_tcon *tcon; |
| char *origin_fullpath, *leaf_fullpath; |
| struct list_head dfs_ses_list; |
| }; |
| |
| static inline void free_dfs_info_param(struct dfs_info3_param *param) |
| { |
| if (param) { |
| kfree(param->path_name); |
| kfree(param->node_name); |
| } |
| } |
| |
| static inline void free_dfs_info_array(struct dfs_info3_param *param, |
| int number_of_items) |
| { |
| int i; |
| |
| if ((number_of_items == 0) || (param == NULL)) |
| return; |
| for (i = 0; i < number_of_items; i++) { |
| kfree(param[i].path_name); |
| kfree(param[i].node_name); |
| } |
| kfree(param); |
| } |
| |
| static inline bool is_interrupt_error(int error) |
| { |
| switch (error) { |
| case -EINTR: |
| case -ERESTARTSYS: |
| case -ERESTARTNOHAND: |
| case -ERESTARTNOINTR: |
| return true; |
| } |
| return false; |
| } |
| |
| static inline bool is_retryable_error(int error) |
| { |
| if (is_interrupt_error(error) || error == -EAGAIN) |
| return true; |
| return false; |
| } |
| |
| |
| /* cifs_get_writable_file() flags */ |
| #define FIND_WR_ANY 0 |
| #define FIND_WR_FSUID_ONLY 1 |
| #define FIND_WR_WITH_DELETE 2 |
| |
| #define MID_FREE 0 |
| #define MID_REQUEST_ALLOCATED 1 |
| #define MID_REQUEST_SUBMITTED 2 |
| #define MID_RESPONSE_RECEIVED 4 |
| #define MID_RETRY_NEEDED 8 /* session closed while this request out */ |
| #define MID_RESPONSE_MALFORMED 0x10 |
| #define MID_SHUTDOWN 0x20 |
| |
| /* Flags */ |
| #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */ |
| #define MID_DELETED 2 /* Mid has been dequeued/deleted */ |
| |
| /* Types of response buffer returned from SendReceive2 */ |
| #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ |
| #define CIFS_SMALL_BUFFER 1 |
| #define CIFS_LARGE_BUFFER 2 |
| #define CIFS_IOVEC 4 /* array of response buffers */ |
| |
| /* Type of Request to SendReceive2 */ |
| #define CIFS_BLOCKING_OP 1 /* operation can block */ |
| #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ |
| #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ |
| #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ |
| #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ |
| #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ |
| |
| /* Type of request operation */ |
| #define CIFS_ECHO_OP 0x080 /* echo request */ |
| #define CIFS_OBREAK_OP 0x0100 /* oplock break request */ |
| #define CIFS_NEG_OP 0x0200 /* negotiate request */ |
| #define CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */ |
| /* Lower bitmask values are reserved by others below. */ |
| #define CIFS_SESS_OP 0x2000 /* session setup request */ |
| #define CIFS_OP_MASK 0x2780 /* mask request type */ |
| |
| #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ |
| #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ |
| #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ |
| |
| /* Security Flags: indicate type of session setup needed */ |
| #define CIFSSEC_MAY_SIGN 0x00001 |
| #define CIFSSEC_MAY_NTLMV2 0x00004 |
| #define CIFSSEC_MAY_KRB5 0x00008 |
| #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ |
| #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */ |
| |
| #define CIFSSEC_MUST_SIGN 0x01001 |
| /* note that only one of the following can be set so the |
| result of setting MUST flags more than once will be to |
| require use of the stronger protocol */ |
| #define CIFSSEC_MUST_NTLMV2 0x04004 |
| #define CIFSSEC_MUST_KRB5 0x08008 |
| #ifdef CONFIG_CIFS_UPCALL |
| #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */ |
| #else |
| #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */ |
| #endif /* UPCALL */ |
| #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ |
| #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ |
| |
| #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) |
| #define CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2) |
| #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) |
| /* |
| ***************************************************************** |
| * All constants go here |
| ***************************************************************** |
| */ |
| |
| #define UID_HASH (16) |
| |
| /* |
| * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the |
| * following to be declared. |
| */ |
| |
| /**************************************************************************** |
| * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according |
| * to the locking order. i.e. if two locks are to be held together, the lock that |
| * appears higher in this list needs to be taken before the other. |
| * |
| * If you hold a lock that is lower in this list, and you need to take a higher lock |
| * (or if you think that one of the functions that you're calling may need to), first |
| * drop the lock you hold, pick up the higher lock, then the lower one. This will |
| * ensure that locks are picked up only in one direction in the below table |
| * (top to bottom). |
| * |
| * Also, if you expect a function to be called with a lock held, explicitly document |
| * this in the comments on top of your function definition. |
| * |
| * And also, try to keep the critical sections (lock hold time) to be as minimal as |
| * possible. Blocking / calling other functions with a lock held always increase |
| * the risk of a possible deadlock. |
| * |
| * Following this rule will avoid unnecessary deadlocks, which can get really hard to |
| * debug. Also, any new lock that you introduce, please add to this list in the correct |
| * order. |
| * |
| * Please populate this list whenever you introduce new locks in your changes. Or in |
| * case I've missed some existing locks. Please ensure that it's added in the list |
| * based on the locking order expected. |
| * |
| * ===================================================================================== |
| * Lock Protects Initialization fn |
| * ===================================================================================== |
| * vol_list_lock |
| * vol_info->ctx_lock vol_info->ctx |
| * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb |
| * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session |
| * reconnect_mutex |
| * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session |
| * cifs_ses->session_mutex cifs_ses sesInfoAlloc |
| * cifs_tcon |
| * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc |
| * cifs_tcon->pending_opens |
| * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc |
| * cifs_tcon->bytes_written |
| * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc |
| * GlobalMid_Lock GlobalMaxActiveXid init_cifs |
| * GlobalCurrentXid |
| * GlobalTotalActiveXid |
| * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change) |
| * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session |
| * ->CurrentMid |
| * (any changes in mid_q_entry fields) |
| * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session |
| * ->credits |
| * ->echo_credits |
| * ->oplock_credits |
| * ->reconnect_instance |
| * cifs_ses->ses_lock (anything that is not protected by another lock and can change) |
| * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc |
| * ->iface_count |
| * ->iface_last_update |
| * cifs_ses->chan_lock cifs_ses->chans |
| * ->chans_need_reconnect |
| * ->chans_in_reconnect |
| * cifs_tcon->tc_lock (anything that is not protected by another lock and can change) |
| * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode |
| * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc |
| * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once |
| * ->can_cache_brlcks |
| * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc |
| * cached_fid->fid_mutex cifs_tcon->crfid tconInfoAlloc |
| * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo |
| * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo |
| * ->invalidHandle initiate_cifs_search |
| * ->oplock_break_cancelled |
| * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc |
| ****************************************************************************/ |
| |
| #ifdef DECLARE_GLOBALS_HERE |
| #define GLOBAL_EXTERN |
| #else |
| #define GLOBAL_EXTERN extern |
| #endif |
| |
| /* |
| * the list of TCP_Server_Info structures, ie each of the sockets |
| * connecting our client to a distinct server (ip address), is |
| * chained together by cifs_tcp_ses_list. The list of all our SMB |
| * sessions (and from that the tree connections) can be found |
| * by iterating over cifs_tcp_ses_list |
| */ |
| extern struct list_head cifs_tcp_ses_list; |
| |
| /* |
| * This lock protects the cifs_tcp_ses_list, the list of smb sessions per |
| * tcp session, and the list of tcon's per smb session. It also protects |
| * the reference counters for the server, smb session, and tcon. |
| * generally the locks should be taken in order tcp_ses_lock before |
| * tcon->open_file_lock and that before file->file_info_lock since the |
| * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file |
| */ |
| extern spinlock_t cifs_tcp_ses_lock; |
| |
| /* |
| * Global transaction id (XID) information |
| */ |
| extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ |
| extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ |
| extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ |
| extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ |
| |
| /* |
| * Global counters, updated atomically |
| */ |
| extern atomic_t sesInfoAllocCount; |
| extern atomic_t tconInfoAllocCount; |
| extern atomic_t tcpSesNextId; |
| extern atomic_t tcpSesAllocCount; |
| extern atomic_t tcpSesReconnectCount; |
| extern atomic_t tconInfoReconnectCount; |
| |
| /* Various Debug counters */ |
| extern atomic_t buf_alloc_count; /* current number allocated */ |
| extern atomic_t small_buf_alloc_count; |
| #ifdef CONFIG_CIFS_STATS2 |
| extern atomic_t total_buf_alloc_count; /* total allocated over all time */ |
| extern atomic_t total_small_buf_alloc_count; |
| extern unsigned int slow_rsp_threshold; /* number of secs before logging */ |
| #endif |
| |
| /* Misc globals */ |
| extern bool enable_oplocks; /* enable or disable oplocks */ |
| extern bool lookupCacheEnabled; |
| extern unsigned int global_secflags; /* if on, session setup sent |
| with more secure ntlmssp2 challenge/resp */ |
| extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ |
| extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */ |
| extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */ |
| extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */ |
| extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ |
| extern unsigned int CIFSMaxBufSize; /* max size not including hdr */ |
| extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ |
| extern unsigned int cifs_min_small; /* min size of small buf pool */ |
| extern unsigned int cifs_max_pending; /* MAX requests at once to server*/ |
| extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */ |
| extern atomic_t mid_count; |
| |
| void cifs_oplock_break(struct work_struct *work); |
| void cifs_queue_oplock_break(struct cifsFileInfo *cfile); |
| void smb2_deferred_work_close(struct work_struct *work); |
| |
| extern const struct slow_work_ops cifs_oplock_break_ops; |
| extern struct workqueue_struct *cifsiod_wq; |
| extern struct workqueue_struct *decrypt_wq; |
| extern struct workqueue_struct *fileinfo_put_wq; |
| extern struct workqueue_struct *cifsoplockd_wq; |
| extern struct workqueue_struct *deferredclose_wq; |
| extern __u32 cifs_lock_secret; |
| |
| extern mempool_t *cifs_mid_poolp; |
| |
| /* Operations for different SMB versions */ |
| #define SMB1_VERSION_STRING "1.0" |
| #define SMB20_VERSION_STRING "2.0" |
| #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
| extern struct smb_version_operations smb1_operations; |
| extern struct smb_version_values smb1_values; |
| extern struct smb_version_operations smb20_operations; |
| extern struct smb_version_values smb20_values; |
| #endif /* CIFS_ALLOW_INSECURE_LEGACY */ |
| #define SMB21_VERSION_STRING "2.1" |
| extern struct smb_version_operations smb21_operations; |
| extern struct smb_version_values smb21_values; |
| #define SMBDEFAULT_VERSION_STRING "default" |
| extern struct smb_version_values smbdefault_values; |
| #define SMB3ANY_VERSION_STRING "3" |
| extern struct smb_version_values smb3any_values; |
| #define SMB30_VERSION_STRING "3.0" |
| extern struct smb_version_operations smb30_operations; |
| extern struct smb_version_values smb30_values; |
| #define SMB302_VERSION_STRING "3.02" |
| #define ALT_SMB302_VERSION_STRING "3.0.2" |
| /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */ |
| extern struct smb_version_values smb302_values; |
| #define SMB311_VERSION_STRING "3.1.1" |
| #define ALT_SMB311_VERSION_STRING "3.11" |
| extern struct smb_version_operations smb311_operations; |
| extern struct smb_version_values smb311_values; |
| |
| static inline char *get_security_type_str(enum securityEnum sectype) |
| { |
| switch (sectype) { |
| case RawNTLMSSP: |
| return "RawNTLMSSP"; |
| case Kerberos: |
| return "Kerberos"; |
| case NTLMv2: |
| return "NTLMv2"; |
| default: |
| return "Unknown"; |
| } |
| } |
| |
| static inline bool is_smb1_server(struct TCP_Server_Info *server) |
| { |
| return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; |
| } |
| |
| static inline bool is_tcon_dfs(struct cifs_tcon *tcon) |
| { |
| /* |
| * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS |
| * Subsystem Notifies That a Share Is a DFS Share. |
| * |
| * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server |
| * Application Updates a Share. |
| */ |
| if (!tcon || !tcon->ses || !tcon->ses->server) |
| return false; |
| return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : |
| tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); |
| } |
| |
| static inline bool cifs_is_referral_server(struct cifs_tcon *tcon, |
| const struct dfs_info3_param *ref) |
| { |
| /* |
| * Check if all targets are capable of handling DFS referrals as per |
| * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL. |
| */ |
| return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER)); |
| } |
| |
| static inline u64 cifs_flock_len(const struct file_lock *fl) |
| { |
| return (u64)fl->fl_end - fl->fl_start + 1; |
| } |
| |
| static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses) |
| { |
| if (WARN_ON_ONCE(!ses || !ses->server)) |
| return 0; |
| /* |
| * Make workstation name no more than 15 chars when using insecure dialects as some legacy |
| * servers do require it during NTLMSSP. |
| */ |
| if (ses->server->dialect <= SMB20_PROT_ID) |
| return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL); |
| return sizeof(ses->workstation_name); |
| } |
| |
| static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src) |
| { |
| memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src)); |
| dst->AccessFlags = src->AccessFlags; |
| dst->CurrentByteOffset = src->CurrentByteOffset; |
| dst->Mode = src->Mode; |
| dst->AlignmentRequirement = src->AlignmentRequirement; |
| dst->FileNameLength = src->FileNameLength; |
| } |
| |
| static inline int cifs_get_num_sgs(const struct smb_rqst *rqst, |
| int num_rqst, |
| const u8 *sig) |
| { |
| unsigned int len, skip; |
| unsigned int nents = 0; |
| unsigned long addr; |
| int i, j; |
| |
| /* |
| * The first rqst has a transform header where the first 20 bytes are |
| * not part of the encrypted blob. |
| */ |
| skip = 20; |
| |
| /* Assumes the first rqst has a transform header as the first iov. |
| * I.e. |
| * rqst[0].rq_iov[0] is transform header |
| * rqst[0].rq_iov[1+] data to be encrypted/decrypted |
| * rqst[1+].rq_iov[0+] data to be encrypted/decrypted |
| */ |
| for (i = 0; i < num_rqst; i++) { |
| /* We really don't want a mixture of pinned and unpinned pages |
| * in the sglist. It's hard to keep track of which is what. |
| * Instead, we convert to a BVEC-type iterator higher up. |
| */ |
| if (WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter))) |
| return -EIO; |
| |
| /* We also don't want to have any extra refs or pins to clean |
| * up in the sglist. |
| */ |
| if (WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter))) |
| return -EIO; |
| |
| for (j = 0; j < rqst[i].rq_nvec; j++) { |
| struct kvec *iov = &rqst[i].rq_iov[j]; |
| |
| addr = (unsigned long)iov->iov_base + skip; |
| if (unlikely(is_vmalloc_addr((void *)addr))) { |
| len = iov->iov_len - skip; |
| nents += DIV_ROUND_UP(offset_in_page(addr) + len, |
| PAGE_SIZE); |
| } else { |
| nents++; |
| } |
| skip = 0; |
| } |
| nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX); |
| } |
| nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE); |
| return nents; |
| } |
| |
| /* We can not use the normal sg_set_buf() as we will sometimes pass a |
| * stack object as buf. |
| */ |
| static inline void cifs_sg_set_buf(struct sg_table *sgtable, |
| const void *buf, |
| unsigned int buflen) |
| { |
| unsigned long addr = (unsigned long)buf; |
| unsigned int off = offset_in_page(addr); |
| |
| addr &= PAGE_MASK; |
| if (unlikely(is_vmalloc_addr((void *)addr))) { |
| do { |
| unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off); |
| |
| sg_set_page(&sgtable->sgl[sgtable->nents++], |
| vmalloc_to_page((void *)addr), len, off); |
| |
| off = 0; |
| addr += PAGE_SIZE; |
| buflen -= len; |
| } while (buflen); |
| } else { |
| sg_set_page(&sgtable->sgl[sgtable->nents++], |
| virt_to_page(addr), buflen, off); |
| } |
| } |
| |
| #endif /* _CIFS_GLOB_H */ |