777 lines
24 KiB
C
777 lines
24 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* NFS internal definitions
|
|
*/
|
|
|
|
#include "nfs4_fs.h"
|
|
#include <linux/mount.h>
|
|
#include <linux/security.h>
|
|
#include <linux/crc32.h>
|
|
#include <linux/nfs_page.h>
|
|
#include <linux/wait_bit.h>
|
|
|
|
#define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
|
|
|
|
extern const struct export_operations nfs_export_ops;
|
|
|
|
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)
|
|
|
|
#define NFS_UNSPEC_RETRANS (UINT_MAX)
|
|
#define NFS_UNSPEC_TIMEO (UINT_MAX)
|
|
|
|
/*
|
|
* Maximum number of pages that readdir can use for creating
|
|
* a vmapped array of pages.
|
|
*/
|
|
#define NFS_MAX_READDIR_PAGES 64
|
|
#define NFS_MAX_READDIR_RAPAGES 8
|
|
|
|
struct nfs_client_initdata {
|
|
unsigned long init_flags;
|
|
const char *hostname; /* Hostname of the server */
|
|
const struct sockaddr *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;
|
|
struct net *net;
|
|
const struct rpc_timeout *timeparms;
|
|
const struct cred *cred;
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
|
|
void *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 nfs_client_initdata *, rpc_authflavor_t);
|
|
struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
|
|
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 *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 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 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 *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 *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;
|
|
|
|
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_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_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
|
|
{
|
|
WARN_ON_ONCE(desc->pg_mirror_count < 1);
|
|
return desc->pg_mirror_count > 1;
|
|
}
|
|
|
|
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 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 nfs_client_initdata *);
|
|
|
|
/* dir.c */
|
|
extern void nfs_advise_use_readdirplus(struct inode *dir);
|
|
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 *, unsigned int);
|
|
|
|
/* 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 *);
|
|
void nfs_zap_acl_cache(struct inode *inode);
|
|
extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
|
|
extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
|
|
extern int nfs_wait_atomic_killable(atomic_t *p, unsigned 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_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 *);
|
|
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);
|
|
|
|
/* 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);
|
|
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_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 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 nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < cinfo->nbuckets; i++)
|
|
cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
|
|
}
|
|
#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);
|
|
#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));
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* 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)
|
|
{
|
|
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_node_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 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 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);
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|