diff options
Diffstat (limited to 'fs/nfs/internal.h')
| -rw-r--r-- | fs/nfs/internal.h | 849 |
1 files changed, 642 insertions, 207 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 3c8373f90ab3..2ecd38e1d17a 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -1,22 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * NFS internal definitions */ #include "nfs4_fs.h" -#include <linux/mount.h> +#include <linux/fs_context.h> #include <linux/security.h> +#include <linux/compiler_attributes.h> +#include <linux/crc32.h> +#include <linux/sunrpc/addr.h> +#include <linux/nfs_page.h> +#include <linux/nfslocalio.h> +#include <linux/wait_bit.h> -#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) +#define NFS_SB_MASK (SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) -struct nfs_string; +extern const struct export_operations nfs_export_ops; -/* Maximum number of readahead requests - * FIXME: this should really be a sysctl so that users may tune it to suit - * their needs. People that do NFS over a slow network, might for - * instance want to reduce it to something closer to 1 for improved - * interactive response. - */ -#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) +struct nfs_string; +struct nfs_pageio_descriptor; static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) { @@ -30,22 +32,27 @@ static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) return 0; - - fattr->fileid = fattr->mounted_on_fileid; return 1; } -struct nfs_clone_mount { - const struct super_block *sb; - const struct dentry *dentry; - struct nfs_fh *fh; - struct nfs_fattr *fattr; - char *hostname; - char *mnt_path; - struct sockaddr *addr; - size_t addrlen; - rpc_authflavor_t authflavor; -}; +static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry) +{ + if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL)) + return false; + if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size) + return false; + return true; +} + +static inline fmode_t flags_to_mode(int flags) +{ + fmode_t res = (__force fmode_t)flags & FMODE_EXEC; + if ((flags & O_ACCMODE) != O_WRONLY) + res |= FMODE_READ; + if ((flags & O_ACCMODE) != O_RDONLY) + res |= FMODE_WRITE; + return res; +} /* * Note: RFC 1813 doesn't limit the number of auth flavors that @@ -58,45 +65,62 @@ struct nfs_clone_mount { */ #define NFS_UNSPEC_PORT (-1) -/* - * Maximum number of pages that readdir can use for creating - * a vmapped array of pages. - */ -#define NFS_MAX_READDIR_PAGES 8 +#define NFS_UNSPEC_RETRANS (UINT_MAX) +#define NFS_UNSPEC_TIMEO (UINT_MAX) struct nfs_client_initdata { unsigned long init_flags; - const char *hostname; - const struct sockaddr *addr; + const char *hostname; /* Hostname of the server */ + const struct sockaddr_storage *addr; /* Address of the server */ + const char *nodename; /* Hostname of the client */ + const char *ip_addr; /* IP address of the client */ size_t addrlen; struct nfs_subversion *nfs_mod; int proto; u32 minorversion; + unsigned int nconnect; + unsigned int max_connect; struct net *net; + const struct rpc_timeout *timeparms; + const struct cred *cred; + struct xprtsec_parms xprtsec; + unsigned long connect_timeout; + unsigned long reconnect_timeout; }; /* * In-kernel mount arguments */ -struct nfs_parsed_mount_data { - int flags; +struct nfs_fs_context { + bool internal; + bool skip_reconfig_option_check; + bool need_mount; + bool sloppy; + unsigned int flags; /* NFS{,4}_MOUNT_* flags */ unsigned int rsize, wsize; unsigned int timeo, retrans; - unsigned int acregmin, acregmax, - acdirmin, acdirmax; + unsigned int acregmin, acregmax; + unsigned int acdirmin, acdirmax; unsigned int namlen; unsigned int options; unsigned int bsize; - unsigned int auth_flavor_len; - rpc_authflavor_t auth_flavors[1]; + struct nfs_auth_info auth_info; + rpc_authflavor_t selected_flavor; + struct xprtsec_parms xprtsec; char *client_address; unsigned int version; unsigned int minorversion; char *fscache_uniq; - bool need_mount; + unsigned short protofamily; + unsigned short mountfamily; + bool has_sec_mnt_opts; + int lock_status; struct { - struct sockaddr_storage address; + union { + struct sockaddr address; + struct sockaddr_storage _address; + }; size_t addrlen; char *hostname; u32 version; @@ -105,21 +129,71 @@ struct nfs_parsed_mount_data { } mount_server; struct { - struct sockaddr_storage address; + union { + struct sockaddr address; + struct sockaddr_storage _address; + }; size_t addrlen; char *hostname; char *export_path; int port; unsigned short protocol; + unsigned short nconnect; + unsigned short max_connect; + unsigned short export_path_len; } nfs_server; - struct security_mnt_opts lsm_opts; - struct net *net; + struct nfs_fh *mntfh; + struct nfs_server *server; + struct nfs_subversion *nfs_mod; + + /* Information for a cloned mount. */ + struct nfs_clone_mount { + struct super_block *sb; + struct dentry *dentry; + struct nfs_fattr *fattr; + unsigned int inherited_bsize; + } clone_data; }; +enum nfs_lock_status { + NFS_LOCK_NOT_SET = 0, + NFS_LOCK_LOCK = 1, + NFS_LOCK_NOLOCK = 2, +}; + +#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ + errorf(fc, fmt, ## __VA_ARGS__) : \ + ({ dprintk(fmt "\n", ## __VA_ARGS__); })) + +#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ + errorf(fc, fmt, ## __VA_ARGS__) : \ + ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) + +#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ + invalf(fc, fmt, ## __VA_ARGS__) : \ + ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) + +#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ + invalf(fc, fmt, ## __VA_ARGS__) : \ + ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) + +#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ + warnf(fc, fmt, ## __VA_ARGS__) : \ + ({ dprintk(fmt "\n", ## __VA_ARGS__); })) + +#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ + warnf(fc, fmt, ## __VA_ARGS__) : \ + ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) + +static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) +{ + return fc->fs_private; +} + /* mount_clnt.c */ struct nfs_mount_request { - struct sockaddr *sap; + struct sockaddr_storage *sap; size_t salen; char *hostname; char *dirpath; @@ -132,63 +206,71 @@ struct nfs_mount_request { struct net *net; }; -struct nfs_mount_info { - void (*fill_super)(struct super_block *, struct nfs_mount_info *); - int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); - struct nfs_parsed_mount_data *parsed; - struct nfs_clone_mount *cloned; - struct nfs_fh *mntfh; -}; - -extern int nfs_mount(struct nfs_mount_request *info); -extern void nfs_umount(const struct nfs_mount_request *info); +extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans); /* client.c */ extern const struct rpc_program nfs_program; extern void nfs_clients_init(struct net *net); +extern void nfs_clients_exit(struct net *net); extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); -int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); -struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, - const struct rpc_timeout *, const char *, - rpc_authflavor_t); -int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); +int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); +struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); +int nfs_probe_server(struct nfs_server *, struct nfs_fh *); void nfs_server_insert_lists(struct nfs_server *); -void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); +void nfs_server_remove_lists(struct nfs_server *); +void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, rpc_authflavor_t); struct nfs_server *nfs_alloc_server(void); void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); -extern void nfs_cleanup_cb_ident_idr(struct net *); extern void nfs_put_client(struct nfs_client *); extern void nfs_free_client(struct nfs_client *); extern struct nfs_client *nfs4_find_client_ident(struct net *, int); extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); -extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, - struct nfs_subversion *); -extern struct nfs_server *nfs4_create_server( - struct nfs_mount_info *, - struct nfs_subversion *); -extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, - struct nfs_fh *); +extern struct nfs_server *nfs_create_server(struct fs_context *); +extern void nfs_server_set_init_caps(struct nfs_server *); +extern struct nfs_server *nfs4_create_server(struct fs_context *); +extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); +extern int nfs4_update_server(struct nfs_server *server, const char *hostname, + struct sockaddr_storage *sap, size_t salen, + struct net *net); extern void nfs_free_server(struct nfs_server *server); extern struct nfs_server *nfs_clone_server(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, rpc_authflavor_t); +extern bool nfs_client_init_is_complete(const struct nfs_client *clp); +extern int nfs_client_init_status(const struct nfs_client *clp); extern int nfs_wait_client_init_complete(const struct nfs_client *clp); extern void nfs_mark_client_ready(struct nfs_client *clp, int state); -extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, - const struct sockaddr *ds_addr, +extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, + const struct sockaddr_storage *ds_addr, int ds_addrlen, int ds_proto, unsigned int ds_timeo, - unsigned int ds_retrans); + unsigned int ds_retrans, + u32 minor_version); +extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, + struct inode *); +extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, + const struct sockaddr_storage *ds_addr, int ds_addrlen, + int ds_proto, unsigned int ds_timeo, + unsigned int ds_retrans); #ifdef CONFIG_PROC_FS extern int __init nfs_fs_proc_init(void); extern void nfs_fs_proc_exit(void); +extern int nfs_fs_proc_net_init(struct net *net); +extern void nfs_fs_proc_net_exit(struct net *net); #else +static inline int nfs_fs_proc_net_init(struct net *net) +{ + return 0; +} +static inline void nfs_fs_proc_net_exit(struct net *net) +{ +} static inline int nfs_fs_proc_init(void) { return 0; @@ -198,22 +280,13 @@ static inline void nfs_fs_proc_exit(void) } #endif -#ifdef CONFIG_NFS_V4_1 -int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); -#endif - -/* nfs3client.c */ -#if IS_ENABLED(CONFIG_NFS_V3) -struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); -struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, - struct nfs_fattr *, rpc_authflavor_t); -#endif - /* callback_xdr.c */ -extern struct svc_version nfs4_callback_version1; -extern struct svc_version nfs4_callback_version4; +extern const struct svc_version nfs4_callback_version1; +extern const struct svc_version nfs4_callback_version4; + +/* fs_context.c */ +extern struct file_system_type nfs_fs_type; -struct nfs_pageio_descriptor; /* pagelist.c */ extern int __init nfs_init_nfspagecache(void); extern void nfs_destroy_nfspagecache(void); @@ -224,33 +297,44 @@ extern void nfs_destroy_writepagecache(void); extern int __init nfs_init_directcache(void); extern void nfs_destroy_directcache(void); -extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr, void (*release)(struct nfs_pgio_header *hdr)); void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); -int nfs_iocounter_wait(struct nfs_io_counter *c); - -static inline void nfs_iocounter_init(struct nfs_io_counter *c) +int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); + +extern const struct nfs_pageio_ops nfs_pgio_rw_ops; +struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); +void nfs_pgio_header_free(struct nfs_pgio_header *); +int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); +int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, + const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, + const struct rpc_call_ops *call_ops, int how, int flags, + struct nfsd_file *localio); +void nfs_free_request(struct nfs_page *req); +struct nfs_pgio_mirror * +nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); + +static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, + const struct nfs_open_context *ctx2) { - c->flags = 0; - atomic_set(&c->io_count, 0); + return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; } /* nfs2xdr.c */ -extern struct rpc_procinfo nfs_procedures[]; +extern const struct rpc_procinfo nfs_procedures[]; extern int nfs2_decode_dirent(struct xdr_stream *, - struct nfs_entry *, int); + struct nfs_entry *, bool); /* nfs3xdr.c */ -extern struct rpc_procinfo nfs3_procedures[]; +extern const struct rpc_procinfo nfs3_procedures[]; extern int nfs3_decode_dirent(struct xdr_stream *, - struct nfs_entry *, int); + struct nfs_entry *, bool); /* nfs4xdr.c */ #if IS_ENABLED(CONFIG_NFS_V4) extern int nfs4_decode_dirent(struct xdr_stream *, - struct nfs_entry *, int); + struct nfs_entry *, bool); #endif #ifdef CONFIG_NFS_V4_1 extern const u32 nfs41_maxread_overhead; @@ -260,205 +344,433 @@ extern const u32 nfs41_maxgetdevinfo_overhead; /* nfs4proc.c */ #if IS_ENABLED(CONFIG_NFS_V4) -extern struct rpc_procinfo nfs4_procedures[]; +extern const struct rpc_procinfo nfs4_procedures[]; #endif +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); +static inline struct nfs4_label * +nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) +{ + if (!dst || !src) + return NULL; + + if (src->len > NFS4_MAXLABELLEN) + return NULL; + + dst->lfs = src->lfs; + dst->pi = src->pi; + dst->len = src->len; + memcpy(dst->label, src->label, src->len); + + return dst; +} + +static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) +{ + if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) + nfsi->cache_validity |= NFS_INO_INVALID_LABEL; +} +#else +static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } +static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) +{ +} +static inline struct nfs4_label * +nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) +{ + return NULL; +} +#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ + /* proc.c */ void nfs_close_context(struct nfs_open_context *ctx, int is_sync); extern struct nfs_client *nfs_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const char *ip_addr, rpc_authflavor_t authflavour); + const struct nfs_client_initdata *); /* dir.c */ -extern int nfs_access_cache_shrinker(struct shrinker *shrink, - struct shrink_control *sc); +extern void nfs_readdir_record_entry_cache_hit(struct inode *dir); +extern void nfs_readdir_record_entry_cache_miss(struct inode *dir); +extern unsigned long nfs_access_cache_count(struct shrinker *shrink, + struct shrink_control *sc); +extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, + struct shrink_control *sc); struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); -int nfs_create(struct inode *, struct dentry *, umode_t, bool); -int nfs_mkdir(struct inode *, struct dentry *, umode_t); +void nfs_d_prune_case_insensitive_aliases(struct inode *inode); +int nfs_create(struct mnt_idmap *, struct inode *, struct dentry *, + umode_t, bool); +struct dentry *nfs_mkdir(struct mnt_idmap *, struct inode *, struct dentry *, + umode_t); int nfs_rmdir(struct inode *, struct dentry *); int nfs_unlink(struct inode *, struct dentry *); -int nfs_symlink(struct inode *, struct dentry *, const char *); +int nfs_symlink(struct mnt_idmap *, struct inode *, struct dentry *, + const char *); int nfs_link(struct dentry *, struct inode *, struct dentry *); -int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); -int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); +int nfs_mknod(struct mnt_idmap *, struct inode *, struct dentry *, umode_t, + dev_t); +int nfs_rename(struct mnt_idmap *, struct inode *, struct dentry *, + struct inode *, struct dentry *, unsigned int); + +#ifdef CONFIG_NFS_V4_2 +static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server) +{ + if (!(server->caps & NFS_CAP_XATTR)) + return 0; + return NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | NFS4_ACCESS_XALIST; +} +#else +static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server) +{ + return 0; +} +#endif /* file.c */ -int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); +int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); loff_t nfs_file_llseek(struct file *, loff_t, int); -int nfs_file_flush(struct file *, fl_owner_t); -ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); -ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, - size_t, unsigned int); -int nfs_file_mmap(struct file *, struct vm_area_struct *); -ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t); +ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); +ssize_t nfs_file_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe, + size_t len, unsigned int flags); +int nfs_file_mmap_prepare(struct vm_area_desc *); +ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); int nfs_file_release(struct inode *, struct file *); int nfs_lock(struct file *, int, struct file_lock *); int nfs_flock(struct file *, int, struct file_lock *); -ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *, - size_t, unsigned int); int nfs_check_flags(int); -int nfs_setlease(struct file *, long, struct file_lock **); +void nfs_truncate_last_folio(struct address_space *mapping, loff_t from, + loff_t to); /* inode.c */ extern struct workqueue_struct *nfsiod_workqueue; +extern struct workqueue_struct *nfslocaliod_workqueue; extern struct inode *nfs_alloc_inode(struct super_block *sb); -extern void nfs_destroy_inode(struct inode *); +extern void nfs_free_inode(struct inode *); extern int nfs_write_inode(struct inode *, struct writeback_control *); extern int nfs_drop_inode(struct inode *); extern void nfs_clear_inode(struct inode *); extern void nfs_evict_inode(struct inode *); -void nfs_zap_acl_cache(struct inode *inode); -extern int nfs_wait_bit_killable(void *word); +extern void nfs_zap_acl_cache(struct inode *inode); +extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags); +extern bool nfs_check_cache_invalid(struct inode *, unsigned long); +extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); + +#if IS_ENABLED(CONFIG_NFS_LOCALIO) +/* localio.c */ +struct nfs_local_dio { + u32 mem_align; + u32 offset_align; + loff_t middle_offset; + loff_t end_offset; + ssize_t start_len; /* Length for misaligned first extent */ + ssize_t middle_len; /* Length for DIO-aligned middle extent */ + ssize_t end_len; /* Length for misaligned last extent */ +}; + +extern void nfs_local_probe_async(struct nfs_client *); +extern void nfs_local_probe_async_work(struct work_struct *); +extern struct nfsd_file *nfs_local_open_fh(struct nfs_client *, + const struct cred *, + struct nfs_fh *, + struct nfs_file_localio *, + const fmode_t); +extern int nfs_local_doio(struct nfs_client *, + struct nfsd_file *, + struct nfs_pgio_header *, + const struct rpc_call_ops *); +extern int nfs_local_commit(struct nfsd_file *, + struct nfs_commit_data *, + const struct rpc_call_ops *, int); +extern bool nfs_server_is_local(const struct nfs_client *clp); + +#else /* CONFIG_NFS_LOCALIO */ +static inline void nfs_local_probe(struct nfs_client *clp) {} +static inline void nfs_local_probe_async(struct nfs_client *clp) {} +static inline struct nfsd_file * +nfs_local_open_fh(struct nfs_client *clp, const struct cred *cred, + struct nfs_fh *fh, struct nfs_file_localio *nfl, + const fmode_t mode) +{ + return NULL; +} +static inline int nfs_local_doio(struct nfs_client *clp, + struct nfsd_file *localio, + struct nfs_pgio_header *hdr, + const struct rpc_call_ops *call_ops) +{ + return -EINVAL; +} +static inline int nfs_local_commit(struct nfsd_file *localio, + struct nfs_commit_data *data, + const struct rpc_call_ops *call_ops, int how) +{ + return -EINVAL; +} +static inline bool nfs_server_is_local(const struct nfs_client *clp) +{ + return false; +} +#endif /* CONFIG_NFS_LOCALIO */ /* super.c */ extern const struct super_operations nfs_sops; -extern struct file_system_type nfs_fs_type; -extern struct file_system_type nfs_xdev_fs_type; -#if IS_ENABLED(CONFIG_NFS_V4) -extern struct file_system_type nfs4_xdev_fs_type; -extern struct file_system_type nfs4_referral_fs_type; -#endif -struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, - struct nfs_subversion *); -void nfs_initialise_sb(struct super_block *); -int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); -struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, - struct nfs_mount_info *, struct nfs_subversion *); -struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); -struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, - const char *, struct nfs_mount_info *); +bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); +int nfs_try_get_tree(struct fs_context *); +int nfs_get_tree_common(struct fs_context *); void nfs_kill_super(struct super_block *); -void nfs_fill_super(struct super_block *, struct nfs_mount_info *); - -extern struct rpc_stat nfs_rpcstat; extern int __init register_nfs_fs(void); extern void __exit unregister_nfs_fs(void); -extern void nfs_sb_active(struct super_block *sb); +extern bool nfs_sb_active(struct super_block *sb); extern void nfs_sb_deactive(struct super_block *sb); +extern int nfs_client_for_each_server(struct nfs_client *clp, + int (*fn)(struct nfs_server *, void *), + void *data); +#ifdef CONFIG_NFS_FSCACHE +extern const struct netfs_request_ops nfs_netfs_ops; +#endif + +/* io.c */ +extern __must_check int nfs_start_io_read(struct inode *inode); +extern void nfs_end_io_read(struct inode *inode); +extern __must_check int nfs_start_io_write(struct inode *inode); +extern void nfs_end_io_write(struct inode *inode); +extern __must_check int nfs_start_io_direct(struct inode *inode); +extern void nfs_end_io_direct(struct inode *inode); + +static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) +{ + return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; +} + +/* Must be called with exclusively locked inode->i_rwsem */ +static inline void nfs_file_block_o_direct(struct nfs_inode *nfsi) +{ + if (test_bit(NFS_INO_ODIRECT, &nfsi->flags)) { + clear_bit(NFS_INO_ODIRECT, &nfsi->flags); + inode_dio_wait(&nfsi->vfs_inode); + } +} + /* namespace.c */ #define NFS_PATH_CANONICAL 1 extern char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen, unsigned flags); extern struct vfsmount *nfs_d_automount(struct path *path); -struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, - struct nfs_fh *, struct nfs_fattr *); -struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, - struct nfs_fattr *, rpc_authflavor_t); +int nfs_submount(struct fs_context *, struct nfs_server *); +int nfs_do_submount(struct fs_context *); /* getroot.c */ -extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, - const char *); +extern int nfs_get_root(struct super_block *s, struct fs_context *fc); #if IS_ENABLED(CONFIG_NFS_V4) -extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, - const char *); - -extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); +extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); #endif struct nfs_pgio_completion_ops; /* read.c */ -extern struct nfs_read_header *nfs_readhdr_alloc(void); -extern void nfs_readhdr_free(struct nfs_pgio_header *hdr); +extern const struct nfs_pgio_completion_ops nfs_async_read_completion_ops; extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, - struct inode *inode, + struct inode *inode, bool force_mds, const struct nfs_pgio_completion_ops *compl_ops); -extern int nfs_initiate_read(struct rpc_clnt *clnt, - struct nfs_read_data *data, - const struct rpc_call_ops *call_ops, int flags); -extern void nfs_read_prepare(struct rpc_task *task, void *calldata); -extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, - struct nfs_pgio_header *hdr); +extern bool nfs_read_alloc_scratch(struct nfs_pgio_header *hdr, size_t size); +extern int nfs_read_add_folio(struct nfs_pageio_descriptor *pgio, + struct nfs_open_context *ctx, + struct folio *folio); +extern void nfs_pageio_complete_read(struct nfs_pageio_descriptor *pgio); extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); -extern void nfs_readdata_release(struct nfs_read_data *rdata); /* super.c */ -void nfs_clone_super(struct super_block *, struct nfs_mount_info *); void nfs_umount_begin(struct super_block *); int nfs_statfs(struct dentry *, struct kstatfs *); int nfs_show_options(struct seq_file *, struct dentry *); int nfs_show_devname(struct seq_file *, struct dentry *); int nfs_show_path(struct seq_file *, struct dentry *); int nfs_show_stats(struct seq_file *, struct dentry *); -void nfs_put_super(struct super_block *); -int nfs_remount(struct super_block *sb, int *flags, char *raw_data); +int nfs_reconfigure(struct fs_context *); /* write.c */ extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, - struct inode *inode, int ioflags, + struct inode *inode, int ioflags, bool force_mds, const struct nfs_pgio_completion_ops *compl_ops); -extern struct nfs_write_header *nfs_writehdr_alloc(void); -extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); -extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, - struct nfs_pgio_header *hdr); extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); -extern void nfs_writedata_release(struct nfs_write_data *wdata); extern void nfs_commit_free(struct nfs_commit_data *p); -extern int nfs_initiate_write(struct rpc_clnt *clnt, - struct nfs_write_data *data, - const struct rpc_call_ops *call_ops, - int how, int flags); -extern void nfs_write_prepare(struct rpc_task *task, void *calldata); extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); extern int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data, + const struct nfs_rpc_ops *nfs_ops, const struct rpc_call_ops *call_ops, - int how, int flags); + int how, int flags, + struct nfsd_file *localio); extern void nfs_init_commit(struct nfs_commit_data *data, struct list_head *head, struct pnfs_layout_segment *lseg, struct nfs_commit_info *cinfo); int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, struct nfs_commit_info *cinfo, int max); +unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); int nfs_scan_commit(struct inode *inode, struct list_head *dst, struct nfs_commit_info *cinfo); void nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, - struct nfs_commit_info *cinfo); + struct nfs_commit_info *cinfo, + u32 ds_commit_idx); +int nfs_write_need_commit(struct nfs_pgio_header *); +void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); int nfs_generic_commit_list(struct inode *inode, struct list_head *head, int how, struct nfs_commit_info *cinfo); void nfs_retry_commit(struct list_head *page_list, struct pnfs_layout_segment *lseg, - struct nfs_commit_info *cinfo); + struct nfs_commit_info *cinfo, + u32 ds_commit_idx); void nfs_commitdata_release(struct nfs_commit_data *data); -void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, +void nfs_request_add_commit_list(struct nfs_page *req, struct nfs_commit_info *cinfo); +void nfs_request_add_commit_list_locked(struct nfs_page *req, + struct list_head *dst, + struct nfs_commit_info *cinfo); void nfs_request_remove_commit_list(struct nfs_page *req, struct nfs_commit_info *cinfo); void nfs_init_cinfo(struct nfs_commit_info *cinfo, struct inode *inode, struct nfs_direct_req *dreq); +int nfs_key_timeout_notify(struct file *filp, struct inode *inode); +bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); +void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); + +int nfs_filemap_write_and_wait_range(struct address_space *mapping, + loff_t lstart, loff_t lend); + +#ifdef CONFIG_NFS_V4_1 +static inline void +pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, + unsigned int nbuckets) +{ + unsigned int i; + + for (i = 0; i < nbuckets; i++) + buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; +} +static inline +void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) +{ + struct pnfs_commit_array *array; + + rcu_read_lock(); + list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) + pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, + array->nbuckets); + rcu_read_unlock(); +} +#else +static inline +void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) +{ +} +#endif #ifdef CONFIG_MIGRATION -extern int nfs_migrate_page(struct address_space *, - struct page *, struct page *, enum migrate_mode); +int nfs_migrate_folio(struct address_space *, struct folio *dst, + struct folio *src, enum migrate_mode); #else -#define nfs_migrate_page NULL +#define nfs_migrate_folio NULL #endif +static inline int +nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, + const struct nfs_write_verifier *v2) +{ + return memcmp(v1->data, v2->data, sizeof(v1->data)); +} + +static inline bool +nfs_write_match_verf(const struct nfs_writeverf *verf, + struct nfs_page *req) +{ + return verf->committed > NFS_UNSTABLE && + !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); +} + +static inline gfp_t nfs_io_gfp_mask(void) +{ + gfp_t ret = current_gfp_context(GFP_KERNEL); + + /* For workers __GFP_NORETRY only with __GFP_IO or __GFP_FS */ + if ((current->flags & PF_WQ_WORKER) && ret == GFP_KERNEL) + ret |= __GFP_NORETRY | __GFP_NOWARN; + return ret; +} + +/* + * Special version of should_remove_suid() that ignores capabilities. + */ +static inline int nfs_should_remove_suid(const struct inode *inode) +{ + umode_t mode = inode->i_mode; + int kill = 0; + + /* suid always must be killed */ + if (unlikely(mode & S_ISUID)) + kill = ATTR_KILL_SUID; + + /* + * sgid without any exec bits is just a mandatory locking mark; leave + * it alone. If some exec bits are set, it's a real sgid; kill it. + */ + if (unlikely((mode & S_ISGID) && (mode & S_IXGRP))) + kill |= ATTR_KILL_SGID; + + if (unlikely(kill && S_ISREG(mode))) + return kill; + + return 0; +} + +/* unlink.c */ +extern struct rpc_task * +nfs_async_rename(struct inode *old_dir, struct inode *new_dir, + struct dentry *old_dentry, struct dentry *new_dentry, + void (*complete)(struct rpc_task *, struct nfs_renamedata *)); +extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); + /* direct.c */ void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, struct nfs_direct_req *dreq); -static inline void nfs_inode_dio_wait(struct inode *inode) -{ - inode_dio_wait(inode); -} -extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); +extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq, loff_t offset); /* nfs4proc.c */ -extern void __nfs4_read_done_cb(struct nfs_read_data *); extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const char *ip_addr, - rpc_authflavor_t authflavour); + const struct nfs_client_initdata *); extern int nfs40_walk_client_list(struct nfs_client *clp, struct nfs_client **result, - struct rpc_cred *cred); + const struct cred *cred); extern int nfs41_walk_client_list(struct nfs_client *clp, struct nfs_client **result, - struct rpc_cred *cred); + const struct cred *cred); +extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, + struct rpc_xprt *xprt, + void *data); + +static inline struct inode *nfs_igrab_and_active(struct inode *inode) +{ + struct super_block *sb = inode->i_sb; + + if (sb && nfs_sb_active(sb)) { + if (igrab(inode)) + return inode; + nfs_sb_deactive(sb); + } + return NULL; +} + +static inline void nfs_iput_and_deactive(struct inode *inode) +{ + if (inode != NULL) { + struct super_block *sb = inode->i_sb; + + iput(inode); + nfs_sb_deactive(sb); + } +} /* * Determine the device name as a string @@ -480,9 +792,9 @@ unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) if ((bsize & (bsize - 1)) || nrbitsp) { unsigned char nrbits; - for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) + for (nrbits = 31; nrbits && !(bsize & (1UL << nrbits)); nrbits--) ; - bsize = 1 << nrbits; + bsize = 1UL << nrbits; if (nrbitsp) *nrbitsp = nrbits; } @@ -514,6 +826,22 @@ unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) } /* + * Compute and set NFS server rsize / wsize + */ +static inline +unsigned long nfs_io_size(unsigned long iosize, enum xprt_transports proto) +{ + if (iosize < NFS_MIN_FILE_IO_SIZE) + iosize = NFS_DEF_FILE_IO_SIZE; + else if (iosize >= NFS_MAX_FILE_IO_SIZE) + iosize = NFS_MAX_FILE_IO_SIZE; + + if (proto == XPRT_TRANSPORT_UDP || iosize < PAGE_SIZE) + return nfs_block_bits(iosize, NULL); + return iosize & PAGE_MASK; +} + +/* * Determine the maximum file size for a superblock */ static inline @@ -525,20 +853,39 @@ void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) } /* + * Record the page as unstable (an extra writeback period) and mark its + * inode as dirty. + */ +static inline void nfs_folio_mark_unstable(struct folio *folio, + struct nfs_commit_info *cinfo) +{ + if (folio && !cinfo->dreq) { + struct inode *inode = folio->mapping->host; + long nr = folio_nr_pages(folio); + + /* This page is really still in write-back - just that the + * writeback is happening on the server now. + */ + node_stat_mod_folio(folio, NR_WRITEBACK, nr); + wb_stat_mod(&inode_to_bdi(inode)->wb, WB_WRITEBACK, nr); + __mark_inode_dirty(inode, I_DIRTY_DATASYNC); + } +} + +/* * Determine the number of bytes of data the page contains */ -static inline -unsigned int nfs_page_length(struct page *page) +static inline size_t nfs_folio_length(struct folio *folio) { - loff_t i_size = i_size_read(page_file_mapping(page)->host); + loff_t i_size = i_size_read(folio->mapping->host); if (i_size > 0) { - pgoff_t page_index = page_file_index(page); - pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; - if (page_index < end_index) - return PAGE_CACHE_SIZE; - if (page_index == end_index) - return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; + pgoff_t index = folio->index >> folio_order(folio); + pgoff_t end_index = (i_size - 1) >> folio_shift(folio); + if (index < end_index) + return folio_size(folio); + if (index == end_index) + return offset_in_folio(folio, i_size - 1) + 1; } return 0; } @@ -556,22 +903,110 @@ unsigned char nfs_umode_to_dtype(umode_t mode) * Determine the number of pages in an array of length 'len' and * with a base offset of 'base' */ -static inline -unsigned int nfs_page_array_len(unsigned int base, size_t len) +static inline unsigned int nfs_page_array_len(unsigned int base, size_t len) { - return ((unsigned long)len + (unsigned long)base + - PAGE_SIZE - 1) >> PAGE_SHIFT; + return ((unsigned long)len + (unsigned long)base + PAGE_SIZE - 1) >> + PAGE_SHIFT; } /* - * Convert a struct timespec into a 64-bit change attribute + * Convert a struct timespec64 into a 64-bit change attribute * - * This does approximately the same thing as timespec_to_ns(), + * This does approximately the same thing as timespec64_to_ns(), * but for calculation efficiency, we multiply the seconds by * 1024*1024*1024. */ static inline -u64 nfs_timespec_to_change_attr(const struct timespec *ts) +u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) { return ((u64)ts->tv_sec << 30) + ts->tv_nsec; } + +static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) +{ + return ~crc32_le(0xFFFFFFFF, &stateid->other[0], + NFS4_STATEID_OTHER_SIZE); +} + +static inline bool nfs_current_task_exiting(void) +{ + return (current->flags & PF_EXITING) != 0; +} + +static inline bool nfs_error_is_fatal(int err) +{ + switch (err) { + case -ERESTARTSYS: + case -EINTR: + case -EACCES: + case -EDQUOT: + case -EFBIG: + case -EIO: + case -ENOSPC: + case -EROFS: + case -ESTALE: + case -E2BIG: + case -ENOMEM: + case -ETIMEDOUT: + return true; + default: + return false; + } +} + +static inline bool nfs_error_is_fatal_on_server(int err) +{ + switch (err) { + case 0: + case -ERESTARTSYS: + case -EINTR: + case -ENOMEM: + return false; + } + return nfs_error_is_fatal(err); +} + +/* + * Select between a default port value and a user-specified port value. + * If a zero value is set, then autobind will be used. + */ +static inline void nfs_set_port(struct sockaddr_storage *sap, int *port, + const unsigned short default_port) +{ + if (*port == NFS_UNSPEC_PORT) + *port = default_port; + + rpc_set_port((struct sockaddr *)sap, *port); +} + +struct nfs_direct_req { + struct kref kref; /* release manager */ + + /* I/O parameters */ + struct nfs_open_context *ctx; /* file open context info */ + struct nfs_lock_context *l_ctx; /* Lock context info */ + struct kiocb * iocb; /* controlling i/o request */ + struct inode * inode; /* target file of i/o */ + + /* completion state */ + atomic_t io_count; /* i/os we're waiting for */ + spinlock_t lock; /* protect completion state */ + + loff_t io_start; /* Start offset for I/O */ + ssize_t count, /* bytes actually processed */ + max_count, /* max expected count */ + error; /* any reported error */ + struct completion completion; /* wait for i/o completion */ + + /* commit state */ + struct nfs_mds_commit_info mds_cinfo; /* Storage for cinfo */ + struct pnfs_ds_commit_info ds_cinfo; /* Storage for cinfo */ + struct work_struct work; + int flags; + /* for write */ +#define NFS_ODIRECT_DO_COMMIT (1) /* an unstable reply was received */ +#define NFS_ODIRECT_RESCHED_WRITES (2) /* write verification failed */ + /* for read */ +#define NFS_ODIRECT_SHOULD_DIRTY (3) /* dirty user-space page after read */ +#define NFS_ODIRECT_DONE INT_MAX /* write verification failed */ +}; 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