| /* |
| * NFS internal definitions |
| */ |
| |
| #include "nfs4_fs.h" |
| #include <linux/mount.h> |
| #include <linux/security.h> |
| #include <linux/crc32.h> |
| #include <linux/nfs_page.h> |
| |
| #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
| |
| struct nfs_string; |
| |
| /* 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) |
| |
| static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) |
| { |
| if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) |
| fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; |
| } |
| |
| static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) |
| { |
| if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || |
| (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && |
| ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) |
| return 0; |
| 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; |
| }; |
| |
| /* |
| * Note: RFC 1813 doesn't limit the number of auth flavors that |
| * a server can return, so make something up. |
| */ |
| #define NFS_MAX_SECFLAVORS (12) |
| |
| /* |
| * Value used if the user did not specify a port value. |
| */ |
| #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 |
| |
| struct nfs_client_initdata { |
| unsigned long init_flags; |
| const char *hostname; |
| const struct sockaddr *addr; |
| size_t addrlen; |
| struct nfs_subversion *nfs_mod; |
| int proto; |
| u32 minorversion; |
| struct net *net; |
| }; |
| |
| /* |
| * In-kernel mount arguments |
| */ |
| struct nfs_parsed_mount_data { |
| int flags; |
| unsigned int rsize, wsize; |
| unsigned int timeo, retrans; |
| unsigned int acregmin, acregmax, |
| acdirmin, acdirmax; |
| unsigned int namlen; |
| unsigned int options; |
| unsigned int bsize; |
| struct nfs_auth_info auth_info; |
| rpc_authflavor_t selected_flavor; |
| char *client_address; |
| unsigned int version; |
| unsigned int minorversion; |
| char *fscache_uniq; |
| bool need_mount; |
| |
| struct { |
| struct sockaddr_storage address; |
| size_t addrlen; |
| char *hostname; |
| u32 version; |
| int port; |
| unsigned short protocol; |
| } mount_server; |
| |
| struct { |
| struct sockaddr_storage address; |
| size_t addrlen; |
| char *hostname; |
| char *export_path; |
| int port; |
| unsigned short protocol; |
| } nfs_server; |
| |
| struct security_mnt_opts lsm_opts; |
| struct net *net; |
| }; |
| |
| /* mount_clnt.c */ |
| struct nfs_mount_request { |
| struct sockaddr *sap; |
| size_t salen; |
| char *hostname; |
| char *dirpath; |
| u32 version; |
| unsigned short protocol; |
| struct nfs_fh *fh; |
| int noresvport; |
| unsigned int *auth_flav_len; |
| rpc_authflavor_t *auth_flavs; |
| 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); |
| |
| /* client.c */ |
| extern const struct rpc_program nfs_program; |
| extern void nfs_clients_init(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 *); |
| void nfs_server_insert_lists(struct nfs_server *); |
| void nfs_server_remove_lists(struct nfs_server *); |
| void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); |
| 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 int nfs4_update_server(struct nfs_server *server, const char *hostname, |
| struct sockaddr *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 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, |
| int ds_addrlen, int ds_proto, |
| unsigned int ds_timeo, |
| unsigned int ds_retrans, |
| u32 minor_version, |
| rpc_authflavor_t au_flavor); |
| 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_client *mds_clp, |
| const struct sockaddr *ds_addr, int ds_addrlen, |
| int ds_proto, unsigned int ds_timeo, |
| unsigned int ds_retrans, rpc_authflavor_t au_flavor); |
| #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; |
| } |
| static inline void nfs_fs_proc_exit(void) |
| { |
| } |
| #endif |
| |
| /* callback_xdr.c */ |
| extern struct svc_version nfs4_callback_version1; |
| extern struct svc_version nfs4_callback_version4; |
| |
| struct nfs_pageio_descriptor; |
| /* pagelist.c */ |
| extern int __init nfs_init_nfspagecache(void); |
| extern void nfs_destroy_nfspagecache(void); |
| extern int __init nfs_init_readpagecache(void); |
| extern void nfs_destroy_readpagecache(void); |
| extern int __init nfs_init_writepagecache(void); |
| extern void nfs_destroy_writepagecache(void); |
| |
| extern int __init nfs_init_directcache(void); |
| extern void nfs_destroy_directcache(void); |
| 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); |
| |
| 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, |
| struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, |
| const struct rpc_call_ops *call_ops, int how, int flags); |
| void nfs_free_request(struct nfs_page *req); |
| struct nfs_pgio_mirror * |
| nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); |
| |
| static inline void nfs_iocounter_init(struct nfs_io_counter *c) |
| { |
| c->flags = 0; |
| atomic_set(&c->io_count, 0); |
| } |
| |
| static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) |
| { |
| WARN_ON_ONCE(desc->pg_mirror_count < 1); |
| return desc->pg_mirror_count > 1; |
| } |
| |
| /* nfs2xdr.c */ |
| extern struct rpc_procinfo nfs_procedures[]; |
| extern int nfs2_decode_dirent(struct xdr_stream *, |
| struct nfs_entry *, int); |
| |
| /* nfs3xdr.c */ |
| extern struct rpc_procinfo nfs3_procedures[]; |
| extern int nfs3_decode_dirent(struct xdr_stream *, |
| struct nfs_entry *, int); |
| |
| /* nfs4xdr.c */ |
| #if IS_ENABLED(CONFIG_NFS_V4) |
| extern int nfs4_decode_dirent(struct xdr_stream *, |
| struct nfs_entry *, int); |
| #endif |
| #ifdef CONFIG_NFS_V4_1 |
| extern const u32 nfs41_maxread_overhead; |
| extern const u32 nfs41_maxwrite_overhead; |
| extern const u32 nfs41_maxgetdevinfo_overhead; |
| #endif |
| |
| /* nfs4proc.c */ |
| #if IS_ENABLED(CONFIG_NFS_V4) |
| extern 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 nfs4_label_free(struct nfs4_label *label) |
| { |
| if (label) { |
| kfree(label->label); |
| kfree(label); |
| } |
| return; |
| } |
| |
| 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 nfs4_label_free(void *label) {} |
| 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); |
| |
| /* dir.c */ |
| extern void nfs_force_use_readdirplus(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); |
| 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_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 *); |
| |
| /* file.c */ |
| int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); |
| loff_t nfs_file_llseek(struct file *, loff_t, int); |
| ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); |
| 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 *, 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 *); |
| int nfs_check_flags(int); |
| |
| /* inode.c */ |
| extern struct workqueue_struct *nfsiod_workqueue; |
| extern struct inode *nfs_alloc_inode(struct super_block *sb); |
| extern void nfs_destroy_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(struct wait_bit_key *key, int mode); |
| |
| /* 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 |
| bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); |
| 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 *); |
| 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 bool nfs_sb_active(struct super_block *sb); |
| extern void nfs_sb_deactive(struct super_block *sb); |
| |
| /* 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); |
| |
| /* getroot.c */ |
| extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
| const char *); |
| #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, bool); |
| #endif |
| |
| struct nfs_pgio_completion_ops; |
| /* read.c */ |
| extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
| struct inode *inode, bool force_mds, |
| const struct nfs_pgio_completion_ops *compl_ops); |
| extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
| extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
| |
| /* 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 *); |
| int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
| |
| /* write.c */ |
| extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
| struct inode *inode, int ioflags, bool force_mds, |
| const struct nfs_pgio_completion_ops *compl_ops); |
| extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
| extern void nfs_commit_free(struct nfs_commit_data *p); |
| 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); |
| 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, |
| 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, |
| 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, |
| 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); |
| void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); |
| |
| #ifdef CONFIG_MIGRATION |
| extern int nfs_migrate_page(struct address_space *, |
| struct page *, struct page *, enum migrate_mode); |
| #else |
| #define nfs_migrate_page NULL |
| #endif |
| |
| /* 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 void nfs_direct_set_resched_writes(struct nfs_direct_req *dreq); |
| |
| /* nfs4proc.c */ |
| extern void __nfs4_read_done_cb(struct nfs_pgio_header *); |
| extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
| const struct rpc_timeout *timeparms, |
| const char *ip_addr); |
| extern int nfs40_walk_client_list(struct nfs_client *clp, |
| struct nfs_client **result, |
| struct rpc_cred *cred); |
| extern int nfs41_walk_client_list(struct nfs_client *clp, |
| struct nfs_client **result, |
| struct rpc_cred *cred); |
| |
| static inline struct inode *nfs_igrab_and_active(struct inode *inode) |
| { |
| inode = igrab(inode); |
| if (inode != NULL && !nfs_sb_active(inode->i_sb)) { |
| iput(inode); |
| inode = NULL; |
| } |
| return inode; |
| } |
| |
| 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 |
| */ |
| static inline char *nfs_devname(struct dentry *dentry, |
| char *buffer, ssize_t buflen) |
| { |
| char *dummy; |
| return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
| } |
| |
| /* |
| * Determine the actual block size (and log2 thereof) |
| */ |
| static inline |
| unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) |
| { |
| /* make sure blocksize is a power of two */ |
| if ((bsize & (bsize - 1)) || nrbitsp) { |
| unsigned char nrbits; |
| |
| for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) |
| ; |
| bsize = 1 << nrbits; |
| if (nrbitsp) |
| *nrbitsp = nrbits; |
| } |
| |
| return bsize; |
| } |
| |
| /* |
| * Calculate the number of 512byte blocks used. |
| */ |
| static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
| { |
| blkcnt_t used = (tsize + 511) >> 9; |
| return (used > ULONG_MAX) ? ULONG_MAX : used; |
| } |
| |
| /* |
| * Compute and set NFS server blocksize |
| */ |
| static inline |
| unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) |
| { |
| if (bsize < NFS_MIN_FILE_IO_SIZE) |
| bsize = NFS_DEF_FILE_IO_SIZE; |
| else if (bsize >= NFS_MAX_FILE_IO_SIZE) |
| bsize = NFS_MAX_FILE_IO_SIZE; |
| |
| return nfs_block_bits(bsize, nrbitsp); |
| } |
| |
| /* |
| * Determine the maximum file size for a superblock |
| */ |
| static inline |
| void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) |
| { |
| sb->s_maxbytes = (loff_t)maxfilesize; |
| if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) |
| sb->s_maxbytes = MAX_LFS_FILESIZE; |
| } |
| |
| /* |
| * Record the page as unstable and mark its inode as dirty. |
| */ |
| static inline |
| void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) |
| { |
| if (!cinfo->dreq) { |
| struct inode *inode = page_file_mapping(page)->host; |
| |
| inc_zone_page_state(page, NR_UNSTABLE_NFS); |
| inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); |
| __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) |
| { |
| loff_t i_size = i_size_read(page_file_mapping(page)->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; |
| } |
| return 0; |
| } |
| |
| /* |
| * Convert a umode to a dirent->d_type |
| */ |
| static inline |
| unsigned char nfs_umode_to_dtype(umode_t mode) |
| { |
| return (mode >> 12) & 15; |
| } |
| |
| /* |
| * 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) |
| { |
| return ((unsigned long)len + (unsigned long)base + |
| PAGE_SIZE - 1) >> PAGE_SHIFT; |
| } |
| |
| /* |
| * Convert a struct timespec into a 64-bit change attribute |
| * |
| * This does approximately the same thing as timespec_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) |
| { |
| return ((u64)ts->tv_sec << 30) + ts->tv_nsec; |
| } |
| |
| #ifdef CONFIG_CRC32 |
| /** |
| * nfs_fhandle_hash - calculate the crc32 hash for the filehandle |
| * @fh - pointer to filehandle |
| * |
| * returns a crc32 hash for the filehandle that is compatible with |
| * the one displayed by "wireshark". |
| */ |
| static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
| { |
| return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); |
| } |
| #else |
| static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
| { |
| return 0; |
| } |
| #endif |