| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Pavel Shilovsky | 2599 | 30.37% | 115 | 19.56% |
| Steve French | 2518 | 29.42% | 201 | 34.18% |
| Paulo Alcantara | 888 | 10.38% | 31 | 5.27% |
| Jeff Layton | 713 | 8.33% | 77 | 13.10% |
| Ronnie Sahlberg | 331 | 3.87% | 36 | 6.12% |
| Shyam Prasad N | 241 | 2.82% | 23 | 3.91% |
| Aurelien Aptel | 193 | 2.25% | 13 | 2.21% |
| Sachin S. Prabhu | 158 | 1.85% | 10 | 1.70% |
| David Howells | 138 | 1.61% | 6 | 1.02% |
| Rohith Surabattula | 101 | 1.18% | 7 | 1.19% |
| Rob Landley | 95 | 1.11% | 1 | 0.17% |
| Shirish Pargaonkar | 93 | 1.09% | 10 | 1.70% |
| Tim Gardner | 56 | 0.65% | 1 | 0.17% |
| Vincent Whitchurch | 51 | 0.60% | 2 | 0.34% |
| Kenneth D'souza | 44 | 0.51% | 2 | 0.34% |
| Long Li | 41 | 0.48% | 5 | 0.85% |
| Suresh Jayaraman | 34 | 0.40% | 5 | 0.85% |
| ZhangXiaoxu | 30 | 0.35% | 4 | 0.68% |
| Dave Kleikamp | 28 | 0.33% | 1 | 0.17% |
| Al Viro | 27 | 0.32% | 3 | 0.51% |
| Jeremy Allison | 25 | 0.29% | 2 | 0.34% |
| Igor Mammedov | 23 | 0.27% | 3 | 0.51% |
| Tejun Heo | 17 | 0.20% | 1 | 0.17% |
| Enzo Matsumiya | 15 | 0.18% | 2 | 0.34% |
| Samuel Cabrero | 12 | 0.14% | 1 | 0.17% |
| Steve French (should it be yesuda sadeh?x) | 12 | 0.14% | 1 | 0.17% |
| Bharath SM | 10 | 0.12% | 1 | 0.17% |
| Amir Goldstein | 8 | 0.09% | 1 | 0.17% |
| Scott Lovenberg | 6 | 0.07% | 2 | 0.34% |
| Winston Wen | 5 | 0.06% | 1 | 0.17% |
| Ben Greear | 5 | 0.06% | 1 | 0.17% |
| Germano Percossi | 5 | 0.06% | 1 | 0.17% |
| Eric W. Biedermann | 4 | 0.05% | 3 | 0.51% |
| Stefan Metzmacher | 4 | 0.05% | 1 | 0.17% |
| Boris Protopopov | 4 | 0.05% | 1 | 0.17% |
| Linus Walleij | 4 | 0.05% | 1 | 0.17% |
| Ross Lagerwall | 4 | 0.05% | 1 | 0.17% |
| Eric Biggers | 3 | 0.04% | 1 | 0.17% |
| Linus Torvalds | 2 | 0.02% | 2 | 0.34% |
| Kees Cook | 2 | 0.02% | 1 | 0.17% |
| Rabin Vincent | 2 | 0.02% | 1 | 0.17% |
| Linus Torvalds (pre-git) | 2 | 0.02% | 1 | 0.17% |
| Stefano Brivio | 2 | 0.02% | 1 | 0.17% |
| Randy Dunlap | 1 | 0.01% | 1 | 0.17% |
| Alexander A. Klimov | 1 | 0.01% | 1 | 0.17% |
| Kirill A. Shutemov | 1 | 0.01% | 1 | 0.17% |
| Christoph Hellwig | 1 | 0.01% | 1 | 0.17% |
| Total | 8559 | 588 |
/* 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 "../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 { bool adjust_tz; union { bool reparse_point; bool symlink; }; struct { __u32 tag; union { struct reparse_data_buffer *buf; struct reparse_posix_data *posix; }; } reparse; char *symlink_target; union { struct smb2_file_all_info fi; struct smb311_posix_qinfo posix_fi; }; }; #define cifs_open_data_reparse(d) \ ((d)->reparse_point || \ (le32_to_cpu((d)->fi.Attributes) & ATTR_REPARSE)) 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); /* 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 point to determine which type of special file */ int (*query_reparse_point)(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, u32 *tag, struct kvec *rsp, int *rsp_buftype); /* 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 xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, char **target_path); /* 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 *tcon, __u64 persistent_fid, __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cifs_inode); /* 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)(struct TCP_Server_Info *server, char *buf, unsigned int *noff); /* 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 */ bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv); int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb, struct kvec *rsp_iov, struct cifs_open_info_data *data); }; 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; bool terminate; 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 SERVER_IS_CHAN(server) (!!(server)->primary_server) struct TCP_Server_Info *primary_server; __u16 channel_sequence_num; /* incremented on primary channel on each chan reconnect */ #ifdef CONFIG_CIFS_SWN_UPCALL bool use_swn_dstaddr; struct sockaddr_storage swn_dstaddr; #endif struct mutex refpath_lock; /* protects leaf_fullpath */ /* * leaf_fullpath: Canonical DFS referral path related to this * connection. * It is used in DFS cache refresher, reconnect and may * change due to nested DFS links. * * Protected by @refpath_lock and @srv_lock. The @refpath_lock is * mostly used for not requiring a copy of @leaf_fullpath when getting * cached or new DFS referrals (which might also sleep during I/O). * While @srv_lock is held for making string and NULL comparions against * both fields as in mount(2) and cache refresh. * * format: \\HOST\SHARE[\OPTIONAL PATH] */ char *leaf_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; size_t weight_fulfilled; unsigned int num_channels; 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); kfree(iface); } 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_INVAL_CHAN_INDEX (-1) #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; struct nls_table *local_nls; }; 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_JUNCTION 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; __u32 max_cached_dirs; #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 dfs_ses_list; struct delayed_work dfs_cache_work; #endif struct delayed_work query_interfaces; /* query interfaces workqueue job */ char *origin_fullpath; /* canonical copy of smb3_fs_context::source */ }; /* * 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; struct list_head dfs_ses_list; }; static inline void __free_dfs_info_param(struct dfs_info3_param *param) { kfree(param->path_name); kfree(param->node_name); } static inline void free_dfs_info_param(struct dfs_info3_param *param) { if (param) __free_dfs_info_param(param); } static inline void zfree_dfs_info_param(struct dfs_info3_param *param) { if (param) { __free_dfs_info_param(param); memset(param, 0, sizeof(*param)); } } 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 #define MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */ /* 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 tcon_info_alloc * 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 unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */ 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; size_t data_size; 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++) { data_size = iov_iter_count(&rqst[i].rq_iter); /* 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 (data_size && 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 (data_size && 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; } if (data_size) 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((void *)addr), buflen, off); } } struct smb2_compound_vars { struct cifs_open_parms oparms; struct kvec rsp_iov[3]; struct smb_rqst rqst[3]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct kvec qi_iov; struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; struct kvec close_iov; struct smb2_file_rename_info rename_info; struct smb2_file_link_info link_info; }; #endif /* _CIFS_GLOB_H */
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