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Diffstat (limited to 'include/linux/nfs_fs_sb.h')
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h new file mode 100644 index 000000000..ef8ba5fbc --- /dev/null +++ b/include/linux/nfs_fs_sb.h @@ -0,0 +1,292 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _NFS_FS_SB +#define _NFS_FS_SB + +#include <linux/list.h> +#include <linux/backing-dev.h> +#include <linux/idr.h> +#include <linux/wait.h> +#include <linux/nfs_xdr.h> +#include <linux/sunrpc/xprt.h> + +#include <linux/atomic.h> +#include <linux/refcount.h> + +struct nfs4_session; +struct nfs_iostats; +struct nlm_host; +struct nfs4_sequence_args; +struct nfs4_sequence_res; +struct nfs_server; +struct nfs4_minor_version_ops; +struct nfs41_server_scope; +struct nfs41_impl_id; + +/* + * The nfs_client identifies our client state to the server. + */ +struct nfs_client { + refcount_t cl_count; + atomic_t cl_mds_count; + int cl_cons_state; /* current construction state (-ve: init error) */ +#define NFS_CS_READY 0 /* ready to be used */ +#define NFS_CS_INITING 1 /* busy initialising */ +#define NFS_CS_SESSION_INITING 2 /* busy initialising session */ + unsigned long cl_res_state; /* NFS resources state */ +#define NFS_CS_CALLBACK 1 /* - callback started */ +#define NFS_CS_IDMAP 2 /* - idmap started */ +#define NFS_CS_RENEWD 3 /* - renewd started */ +#define NFS_CS_STOP_RENEW 4 /* no more state to renew */ +#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ + unsigned long cl_flags; /* behavior switches */ +#define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ +#define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ +#define NFS_CS_MIGRATION 2 /* - transparent state migr */ +#define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */ +#define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */ +#define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */ +#define NFS_CS_NOPING 6 /* - don't ping on connect */ +#define NFS_CS_DS 7 /* - Server is a DS */ +#define NFS_CS_REUSEPORT 8 /* - reuse src port on reconnect */ +#define NFS_CS_PNFS 9 /* - Server used for pnfs */ + struct sockaddr_storage cl_addr; /* server identifier */ + size_t cl_addrlen; + char * cl_hostname; /* hostname of server */ + char * cl_acceptor; /* GSSAPI acceptor name */ + struct list_head cl_share_link; /* link in global client list */ + struct list_head cl_superblocks; /* List of nfs_server structs */ + + struct rpc_clnt * cl_rpcclient; + const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ + int cl_proto; /* Network transport protocol */ + struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ + + u32 cl_minorversion;/* NFSv4 minorversion */ + unsigned int cl_nconnect; /* Number of connections */ + unsigned int cl_max_connect; /* max number of xprts allowed */ + const char * cl_principal; /* used for machine cred */ + +#if IS_ENABLED(CONFIG_NFS_V4) + struct list_head cl_ds_clients; /* auth flavor data servers */ + u64 cl_clientid; /* constant */ + nfs4_verifier cl_confirm; /* Clientid verifier */ + unsigned long cl_state; + + spinlock_t cl_lock; + + unsigned long cl_lease_time; + unsigned long cl_last_renewal; + struct delayed_work cl_renewd; + + struct rpc_wait_queue cl_rpcwaitq; + + /* idmapper */ + struct idmap * cl_idmap; + + /* Client owner identifier */ + const char * cl_owner_id; + + u32 cl_cb_ident; /* v4.0 callback identifier */ + const struct nfs4_minor_version_ops *cl_mvops; + unsigned long cl_mig_gen; + + /* NFSv4.0 transport blocking */ + struct nfs4_slot_table *cl_slot_tbl; + + /* The sequence id to use for the next CREATE_SESSION */ + u32 cl_seqid; + /* The flags used for obtaining the clientid during EXCHANGE_ID */ + u32 cl_exchange_flags; + struct nfs4_session *cl_session; /* shared session */ + bool cl_preserve_clid; + struct nfs41_server_owner *cl_serverowner; + struct nfs41_server_scope *cl_serverscope; + struct nfs41_impl_id *cl_implid; + /* nfs 4.1+ state protection modes: */ + unsigned long cl_sp4_flags; +#define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops + * must use machine cred */ +#define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ +#define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ +#define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ +#define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ +#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ +#define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ +#if IS_ENABLED(CONFIG_NFS_V4_1) + wait_queue_head_t cl_lock_waitq; +#endif /* CONFIG_NFS_V4_1 */ +#endif /* CONFIG_NFS_V4 */ + + /* Our own IP address, as a null-terminated string. + * This is used to generate the mv0 callback address. + */ + char cl_ipaddr[48]; + struct net *cl_net; + struct list_head pending_cb_stateids; +}; + +/* + * NFS client parameters stored in the superblock. + */ +struct nfs_server { + struct nfs_client * nfs_client; /* shared client and NFS4 state */ + struct list_head client_link; /* List of other nfs_server structs + * that share the same client + */ + struct list_head master_link; /* link in master servers list */ + struct rpc_clnt * client; /* RPC client handle */ + struct rpc_clnt * client_acl; /* ACL RPC client handle */ + struct nlm_host *nlm_host; /* NLM client handle */ + struct nfs_iostats __percpu *io_stats; /* I/O statistics */ + atomic_long_t writeback; /* number of writeback pages */ + unsigned int write_congested;/* flag set when writeback gets too high */ + unsigned int flags; /* various flags */ + +/* The following are for internal use only. Also see uapi/linux/nfs_mount.h */ +#define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000 +#define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000 +#define NFS_MOUNT_NORESVPORT 0x40000 +#define NFS_MOUNT_LEGACY_INTERFACE 0x80000 +#define NFS_MOUNT_LOCAL_FLOCK 0x100000 +#define NFS_MOUNT_LOCAL_FCNTL 0x200000 +#define NFS_MOUNT_SOFTERR 0x400000 +#define NFS_MOUNT_SOFTREVAL 0x800000 +#define NFS_MOUNT_WRITE_EAGER 0x01000000 +#define NFS_MOUNT_WRITE_WAIT 0x02000000 +#define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000 + + unsigned int fattr_valid; /* Valid attributes */ + unsigned int caps; /* server capabilities */ + unsigned int rsize; /* read size */ + unsigned int rpages; /* read size (in pages) */ + unsigned int wsize; /* write size */ + unsigned int wpages; /* write size (in pages) */ + unsigned int wtmult; /* server disk block size */ + unsigned int dtsize; /* readdir size */ + unsigned short port; /* "port=" setting */ + unsigned int bsize; /* server block size */ +#ifdef CONFIG_NFS_V4_2 + unsigned int gxasize; /* getxattr size */ + unsigned int sxasize; /* setxattr size */ + unsigned int lxasize; /* listxattr size */ +#endif + unsigned int acregmin; /* attr cache timeouts */ + unsigned int acregmax; + unsigned int acdirmin; + unsigned int acdirmax; + unsigned int namelen; + unsigned int options; /* extra options enabled by mount */ + unsigned int clone_blksize; /* granularity of a CLONE operation */ +#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ +#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ + + enum nfs4_change_attr_type + change_attr_type;/* Description of change attribute */ + + struct nfs_fsid fsid; + __u64 maxfilesize; /* maximum file size */ + struct timespec64 time_delta; /* smallest time granularity */ + unsigned long mount_time; /* when this fs was mounted */ + struct super_block *super; /* VFS super block */ + dev_t s_dev; /* superblock dev numbers */ + struct nfs_auth_info auth_info; /* parsed auth flavors */ + +#ifdef CONFIG_NFS_FSCACHE + struct fscache_volume *fscache; /* superblock cookie */ + char *fscache_uniq; /* Uniquifier (or NULL) */ +#endif + + u32 pnfs_blksize; /* layout_blksize attr */ +#if IS_ENABLED(CONFIG_NFS_V4) + u32 attr_bitmask[3];/* V4 bitmask representing the set + of attributes supported on this + filesystem */ + u32 attr_bitmask_nl[3]; + /* V4 bitmask representing the + set of attributes supported + on this filesystem excluding + the label support bit. */ + u32 exclcreat_bitmask[3]; + /* V4 bitmask representing the + set of attributes supported + on this filesystem for the + exclusive create. */ + u32 cache_consistency_bitmask[3]; + /* V4 bitmask representing the subset + of change attribute, size, ctime + and mtime attributes supported by + the server */ + u32 acl_bitmask; /* V4 bitmask representing the ACEs + that are supported on this + filesystem */ + u32 fh_expire_type; /* V4 bitmask representing file + handle volatility type for + this filesystem */ + struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ + struct rpc_wait_queue roc_rpcwaitq; + void *pnfs_ld_data; /* per mount point data */ + + /* the following fields are protected by nfs_client->cl_lock */ + struct rb_root state_owners; +#endif + struct ida openowner_id; + struct ida lockowner_id; + struct list_head state_owners_lru; + struct list_head layouts; + struct list_head delegations; + struct list_head ss_copies; + + unsigned long mig_gen; + unsigned long mig_status; +#define NFS_MIG_IN_TRANSITION (1) +#define NFS_MIG_FAILED (2) +#define NFS_MIG_TSM_POSSIBLE (3) + + void (*destroy)(struct nfs_server *); + + atomic_t active; /* Keep trace of any activity to this server */ + + /* mountd-related mount options */ + struct sockaddr_storage mountd_address; + size_t mountd_addrlen; + u32 mountd_version; + unsigned short mountd_port; + unsigned short mountd_protocol; + struct rpc_wait_queue uoc_rpcwaitq; + + /* XDR related information */ + unsigned int read_hdrsize; + + /* User namespace info */ + const struct cred *cred; + bool has_sec_mnt_opts; +}; + +/* Server capabilities */ +#define NFS_CAP_READDIRPLUS (1U << 0) +#define NFS_CAP_HARDLINKS (1U << 1) +#define NFS_CAP_SYMLINKS (1U << 2) +#define NFS_CAP_ACLS (1U << 3) +#define NFS_CAP_ATOMIC_OPEN (1U << 4) +#define NFS_CAP_LGOPEN (1U << 5) +#define NFS_CAP_CASE_INSENSITIVE (1U << 6) +#define NFS_CAP_CASE_PRESERVING (1U << 7) +#define NFS_CAP_POSIX_LOCK (1U << 14) +#define NFS_CAP_UIDGID_NOMAP (1U << 15) +#define NFS_CAP_STATEID_NFSV41 (1U << 16) +#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) +#define NFS_CAP_SECURITY_LABEL (1U << 18) +#define NFS_CAP_SEEK (1U << 19) +#define NFS_CAP_ALLOCATE (1U << 20) +#define NFS_CAP_DEALLOCATE (1U << 21) +#define NFS_CAP_LAYOUTSTATS (1U << 22) +#define NFS_CAP_CLONE (1U << 23) +#define NFS_CAP_COPY (1U << 24) +#define NFS_CAP_OFFLOAD_CANCEL (1U << 25) +#define NFS_CAP_LAYOUTERROR (1U << 26) +#define NFS_CAP_COPY_NOTIFY (1U << 27) +#define NFS_CAP_XATTR (1U << 28) +#define NFS_CAP_READ_PLUS (1U << 29) +#define NFS_CAP_FS_LOCATIONS (1U << 30) +#define NFS_CAP_MOVEABLE (1U << 31) +#endif |