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-rw-r--r--fs/nfs/internal.h936
1 files changed, 936 insertions, 0 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
new file mode 100644
index 000000000..35a8ae46b
--- /dev/null
+++ b/fs/nfs/internal.h
@@ -0,0 +1,936 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * NFS internal definitions
+ */
+
+#include "nfs4_fs.h"
+#include <linux/fs_context.h>
+#include <linux/security.h>
+#include <linux/crc32.h>
+#include <linux/sunrpc/addr.h>
+#include <linux/nfs_page.h>
+#include <linux/wait_bit.h>
+
+#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
+
+extern const struct export_operations nfs_export_ops;
+
+struct nfs_string;
+struct nfs_pageio_descriptor;
+
+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;
+}
+
+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
+ * 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)
+
+#define NFS_UNSPEC_RETRANS (UINT_MAX)
+#define NFS_UNSPEC_TIMEO (UINT_MAX)
+
+struct nfs_client_initdata {
+ unsigned long init_flags;
+ 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;
+};
+
+/*
+ * In-kernel mount arguments
+ */
+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;
+ unsigned int 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;
+ unsigned short protofamily;
+ unsigned short mountfamily;
+ bool has_sec_mnt_opts;
+
+ struct {
+ union {
+ struct sockaddr address;
+ struct sockaddr_storage _address;
+ };
+ size_t addrlen;
+ char *hostname;
+ u32 version;
+ int port;
+ unsigned short protocol;
+ } mount_server;
+
+ struct {
+ 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 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;
+};
+
+#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_storage *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;
+};
+
+extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans);
+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 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 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_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_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 fs_context *);
+extern void nfs4_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_server *mds_srv,
+ const struct sockaddr_storage *ds_addr,
+ int ds_addrlen, int ds_proto,
+ unsigned int ds_timeo,
+ 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;
+}
+static inline void nfs_fs_proc_exit(void)
+{
+}
+#endif
+
+/* callback_xdr.c */
+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;
+
+/* 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_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);
+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)
+{
+ return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
+}
+
+/* nfs2xdr.c */
+extern const struct rpc_procinfo nfs_procedures[];
+extern int nfs2_decode_dirent(struct xdr_stream *,
+ struct nfs_entry *, bool);
+
+/* nfs3xdr.c */
+extern const struct rpc_procinfo nfs3_procedures[];
+extern int nfs3_decode_dirent(struct xdr_stream *,
+ struct nfs_entry *, bool);
+
+/* nfs4xdr.c */
+#if IS_ENABLED(CONFIG_NFS_V4)
+extern int nfs4_decode_dirent(struct xdr_stream *,
+ struct nfs_entry *, bool);
+#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 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 nfs_client_initdata *);
+
+/* dir.c */
+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);
+void nfs_d_prune_case_insensitive_aliases(struct inode *inode);
+int nfs_create(struct user_namespace *, struct inode *, struct dentry *,
+ umode_t, bool);
+int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
+ umode_t);
+int nfs_rmdir(struct inode *, struct dentry *);
+int nfs_unlink(struct inode *, struct dentry *);
+int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *,
+ const char *);
+int nfs_link(struct dentry *, struct inode *, struct dentry *);
+int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t,
+ dev_t);
+int nfs_rename(struct user_namespace *, 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(struct file *file, loff_t start, loff_t end, int datasync);
+loff_t nfs_file_llseek(struct file *, loff_t, int);
+ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
+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_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 *);
+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);
+
+/* super.c */
+extern const struct super_operations nfs_sops;
+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 *);
+
+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);
+extern int nfs_client_for_each_server(struct nfs_client *clp,
+ int (*fn)(struct nfs_server *, void *),
+ void *data);
+/* io.c */
+extern void nfs_start_io_read(struct inode *inode);
+extern void nfs_end_io_read(struct inode *inode);
+extern void nfs_start_io_write(struct inode *inode);
+extern void nfs_end_io_write(struct inode *inode);
+extern void 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;
+}
+
+/* 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);
+int nfs_submount(struct fs_context *, struct nfs_server *);
+int nfs_do_submount(struct fs_context *);
+
+/* getroot.c */
+extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
+#if IS_ENABLED(CONFIG_NFS_V4)
+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 bool nfs_read_alloc_scratch(struct nfs_pgio_header *hdr, size_t size);
+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_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_reconfigure(struct fs_context *);
+
+/* 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_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 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
+int nfs_migrate_folio(struct address_space *, struct folio *dst,
+ struct folio *src, enum migrate_mode);
+#else
+#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)
+{
+ if (current->flags & PF_WQ_WORKER)
+ return GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN;
+ return GFP_KERNEL;
+}
+
+/*
+ * 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);
+extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq, loff_t offset);
+
+/* nfs4proc.c */
+extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
+ const struct nfs_client_initdata *);
+extern int nfs40_walk_client_list(struct nfs_client *clp,
+ struct nfs_client **result,
+ const struct cred *cred);
+extern int nfs41_walk_client_list(struct nfs_client *clp,
+ struct nfs_client **result,
+ 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
+ */
+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);
+}
+
+/*
+ * 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
+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 (an extra writeback period) 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;
+
+ /* This page is really still in write-back - just that the
+ * writeback is happening on the server now.
+ */
+ inc_node_page_state(page, NR_WRITEBACK);
+ inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
+ __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 index = page_index(page);
+ pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
+ if (index < end_index)
+ return PAGE_SIZE;
+ if (index == end_index)
+ return ((i_size - 1) & ~PAGE_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 timespec64 into a 64-bit change attribute
+ *
+ * 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 timespec64 *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);
+}
+static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
+{
+ return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
+ NFS4_STATEID_OTHER_SIZE);
+}
+#else
+static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
+{
+ return 0;
+}
+static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
+{
+ return 0;
+}
+#endif
+
+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 */
+ bytes_left, /* bytes left to be sent */
+ 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 */
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-30 17:24:45 +0000