mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 17:08:54 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
768 lines
22 KiB
C
768 lines
22 KiB
C
/*
|
|
* linux/include/linux/nfs_fs.h
|
|
*
|
|
* Copyright (C) 1992 Rick Sladkey
|
|
*
|
|
* OS-specific nfs filesystem definitions and declarations
|
|
*/
|
|
|
|
#ifndef _LINUX_NFS_FS_H
|
|
#define _LINUX_NFS_FS_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/in.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/uio.h>
|
|
|
|
#include <linux/nfs_fs_sb.h>
|
|
|
|
#include <linux/sunrpc/debug.h>
|
|
#include <linux/sunrpc/auth.h>
|
|
#include <linux/sunrpc/clnt.h>
|
|
|
|
#include <linux/nfs.h>
|
|
#include <linux/nfs2.h>
|
|
#include <linux/nfs3.h>
|
|
#include <linux/nfs4.h>
|
|
#include <linux/nfs_xdr.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/mempool.h>
|
|
|
|
/*
|
|
* Enable debugging support for nfs client.
|
|
* Requires RPC_DEBUG.
|
|
*/
|
|
#ifdef RPC_DEBUG
|
|
# define NFS_DEBUG
|
|
#endif
|
|
|
|
#define NFS_MAX_FILE_IO_BUFFER_SIZE 32768
|
|
#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096
|
|
|
|
/*
|
|
* The upper limit on timeouts for the exponential backoff algorithm.
|
|
*/
|
|
#define NFS_WRITEBACK_DELAY (5*HZ)
|
|
#define NFS_WRITEBACK_LOCKDELAY (60*HZ)
|
|
#define NFS_COMMIT_DELAY (5*HZ)
|
|
|
|
/*
|
|
* superblock magic number for NFS
|
|
*/
|
|
#define NFS_SUPER_MAGIC 0x6969
|
|
|
|
/*
|
|
* These are the default flags for swap requests
|
|
*/
|
|
#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
|
|
|
|
#define NFS_RW_SYNC 0x0001 /* O_SYNC handling */
|
|
#define NFS_RW_SWAP 0x0002 /* This is a swap request */
|
|
|
|
/*
|
|
* When flushing a cluster of dirty pages, there can be different
|
|
* strategies:
|
|
*/
|
|
#define FLUSH_AGING 0 /* only flush old buffers */
|
|
#define FLUSH_SYNC 1 /* file being synced, or contention */
|
|
#define FLUSH_WAIT 2 /* wait for completion */
|
|
#define FLUSH_STABLE 4 /* commit to stable storage */
|
|
#define FLUSH_LOWPRI 8 /* low priority background flush */
|
|
#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* NFSv3/v4 Access mode cache entry
|
|
*/
|
|
struct nfs_access_entry {
|
|
unsigned long jiffies;
|
|
struct rpc_cred * cred;
|
|
int mask;
|
|
};
|
|
|
|
struct nfs4_state;
|
|
struct nfs_open_context {
|
|
atomic_t count;
|
|
struct dentry *dentry;
|
|
struct rpc_cred *cred;
|
|
struct nfs4_state *state;
|
|
fl_owner_t lockowner;
|
|
int mode;
|
|
int error;
|
|
|
|
struct list_head list;
|
|
wait_queue_head_t waitq;
|
|
};
|
|
|
|
/*
|
|
* NFSv4 delegation
|
|
*/
|
|
struct nfs_delegation;
|
|
|
|
/*
|
|
* nfs fs inode data in memory
|
|
*/
|
|
struct nfs_inode {
|
|
/*
|
|
* The 64bit 'inode number'
|
|
*/
|
|
__u64 fileid;
|
|
|
|
/*
|
|
* NFS file handle
|
|
*/
|
|
struct nfs_fh fh;
|
|
|
|
/*
|
|
* Various flags
|
|
*/
|
|
unsigned int flags;
|
|
|
|
/*
|
|
* read_cache_jiffies is when we started read-caching this inode,
|
|
* and read_cache_mtime is the mtime of the inode at that time.
|
|
* attrtimeo is for how long the cached information is assumed
|
|
* to be valid. A successful attribute revalidation doubles
|
|
* attrtimeo (up to acregmax/acdirmax), a failure resets it to
|
|
* acregmin/acdirmin.
|
|
*
|
|
* We need to revalidate the cached attrs for this inode if
|
|
*
|
|
* jiffies - read_cache_jiffies > attrtimeo
|
|
*
|
|
* and invalidate any cached data/flush out any dirty pages if
|
|
* we find that
|
|
*
|
|
* mtime != read_cache_mtime
|
|
*/
|
|
unsigned long readdir_timestamp;
|
|
unsigned long read_cache_jiffies;
|
|
unsigned long attrtimeo;
|
|
unsigned long attrtimeo_timestamp;
|
|
__u64 change_attr; /* v4 only */
|
|
|
|
/* "Generation counter" for the attribute cache. This is
|
|
* bumped whenever we update the metadata on the
|
|
* server.
|
|
*/
|
|
unsigned long cache_change_attribute;
|
|
/*
|
|
* Counter indicating the number of outstanding requests that
|
|
* will cause a file data update.
|
|
*/
|
|
atomic_t data_updates;
|
|
|
|
struct nfs_access_entry cache_access;
|
|
|
|
/*
|
|
* This is the cookie verifier used for NFSv3 readdir
|
|
* operations
|
|
*/
|
|
__u32 cookieverf[2];
|
|
|
|
/*
|
|
* This is the list of dirty unwritten pages.
|
|
*/
|
|
spinlock_t req_lock;
|
|
struct list_head dirty;
|
|
struct list_head commit;
|
|
struct radix_tree_root nfs_page_tree;
|
|
|
|
unsigned int ndirty,
|
|
ncommit,
|
|
npages;
|
|
|
|
/* Open contexts for shared mmap writes */
|
|
struct list_head open_files;
|
|
|
|
wait_queue_head_t nfs_i_wait;
|
|
|
|
#ifdef CONFIG_NFS_V4
|
|
/* NFSv4 state */
|
|
struct list_head open_states;
|
|
struct nfs_delegation *delegation;
|
|
int delegation_state;
|
|
struct rw_semaphore rwsem;
|
|
#endif /* CONFIG_NFS_V4*/
|
|
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
/*
|
|
* Legal inode flag values
|
|
*/
|
|
#define NFS_INO_STALE 0x0001 /* possible stale inode */
|
|
#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */
|
|
#define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */
|
|
#define NFS_INO_INVALID_ATTR 0x0008 /* cached attrs are invalid */
|
|
#define NFS_INO_INVALID_DATA 0x0010 /* cached data is invalid */
|
|
#define NFS_INO_INVALID_ATIME 0x0020 /* cached atime is invalid */
|
|
#define NFS_INO_INVALID_ACCESS 0x0040 /* cached access cred invalid */
|
|
|
|
static inline struct nfs_inode *NFS_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct nfs_inode, vfs_inode);
|
|
}
|
|
#define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info))
|
|
|
|
#define NFS_FH(inode) (&NFS_I(inode)->fh)
|
|
#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
|
|
#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
|
|
#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops)
|
|
#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode)))
|
|
#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
|
|
#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
|
|
#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
|
|
#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo)
|
|
#define NFS_MINATTRTIMEO(inode) \
|
|
(S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
|
|
: NFS_SERVER(inode)->acregmin)
|
|
#define NFS_MAXATTRTIMEO(inode) \
|
|
(S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
|
|
: NFS_SERVER(inode)->acregmax)
|
|
#define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp)
|
|
|
|
#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
|
|
#define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING)
|
|
#define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE)
|
|
|
|
#define NFS_FILEID(inode) (NFS_I(inode)->fileid)
|
|
|
|
static inline int nfs_caches_unstable(struct inode *inode)
|
|
{
|
|
return atomic_read(&NFS_I(inode)->data_updates) != 0;
|
|
}
|
|
|
|
static inline void NFS_CACHEINV(struct inode *inode)
|
|
{
|
|
if (!nfs_caches_unstable(inode))
|
|
NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
|
|
}
|
|
|
|
static inline int nfs_server_capable(struct inode *inode, int cap)
|
|
{
|
|
return NFS_SERVER(inode)->caps & cap;
|
|
}
|
|
|
|
static inline int NFS_USE_READDIRPLUS(struct inode *inode)
|
|
{
|
|
return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS;
|
|
}
|
|
|
|
/**
|
|
* nfs_save_change_attribute - Returns the inode attribute change cookie
|
|
* @inode - pointer to inode
|
|
* The "change attribute" is updated every time we finish an operation
|
|
* that will result in a metadata change on the server.
|
|
*/
|
|
static inline long nfs_save_change_attribute(struct inode *inode)
|
|
{
|
|
return NFS_I(inode)->cache_change_attribute;
|
|
}
|
|
|
|
/**
|
|
* nfs_verify_change_attribute - Detects NFS inode cache updates
|
|
* @inode - pointer to inode
|
|
* @chattr - previously saved change attribute
|
|
* Return "false" if metadata has been updated (or is in the process of
|
|
* being updated) since the change attribute was saved.
|
|
*/
|
|
static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
|
|
{
|
|
return !nfs_caches_unstable(inode)
|
|
&& chattr == NFS_I(inode)->cache_change_attribute;
|
|
}
|
|
|
|
/*
|
|
* linux/fs/nfs/inode.c
|
|
*/
|
|
extern void nfs_zap_caches(struct inode *);
|
|
extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
|
|
struct nfs_fattr *);
|
|
extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
|
|
extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
|
|
extern int nfs_permission(struct inode *, int, struct nameidata *);
|
|
extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
|
|
extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
|
|
extern int nfs_open(struct inode *, struct file *);
|
|
extern int nfs_release(struct inode *, struct file *);
|
|
extern int nfs_attribute_timeout(struct inode *inode);
|
|
extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
|
|
extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
|
|
extern int nfs_setattr(struct dentry *, struct iattr *);
|
|
extern void nfs_begin_attr_update(struct inode *);
|
|
extern void nfs_end_attr_update(struct inode *);
|
|
extern void nfs_begin_data_update(struct inode *);
|
|
extern void nfs_end_data_update(struct inode *);
|
|
extern void nfs_end_data_update_defer(struct inode *);
|
|
extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred);
|
|
extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
|
|
extern void put_nfs_open_context(struct nfs_open_context *ctx);
|
|
extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
|
|
extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode);
|
|
extern void nfs_file_clear_open_context(struct file *filp);
|
|
|
|
/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
|
|
extern u32 root_nfs_parse_addr(char *name); /*__init*/
|
|
|
|
/*
|
|
* linux/fs/nfs/file.c
|
|
*/
|
|
extern struct inode_operations nfs_file_inode_operations;
|
|
extern struct file_operations nfs_file_operations;
|
|
extern struct address_space_operations nfs_file_aops;
|
|
|
|
static inline struct rpc_cred *nfs_file_cred(struct file *file)
|
|
{
|
|
if (file != NULL) {
|
|
struct nfs_open_context *ctx;
|
|
|
|
ctx = (struct nfs_open_context*)file->private_data;
|
|
return ctx->cred;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* linux/fs/nfs/direct.c
|
|
*/
|
|
extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
|
|
unsigned long);
|
|
extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf,
|
|
size_t count, loff_t pos);
|
|
extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf,
|
|
size_t count, loff_t pos);
|
|
|
|
/*
|
|
* linux/fs/nfs/dir.c
|
|
*/
|
|
extern struct inode_operations nfs_dir_inode_operations;
|
|
extern struct file_operations nfs_dir_operations;
|
|
extern struct dentry_operations nfs_dentry_operations;
|
|
|
|
extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
|
|
|
|
/*
|
|
* linux/fs/nfs/symlink.c
|
|
*/
|
|
extern struct inode_operations nfs_symlink_inode_operations;
|
|
|
|
/*
|
|
* linux/fs/nfs/unlink.c
|
|
*/
|
|
extern int nfs_async_unlink(struct dentry *);
|
|
extern void nfs_complete_unlink(struct dentry *);
|
|
|
|
/*
|
|
* linux/fs/nfs/write.c
|
|
*/
|
|
extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
|
|
extern int nfs_writepages(struct address_space *, struct writeback_control *);
|
|
extern int nfs_flush_incompatible(struct file *file, struct page *page);
|
|
extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
|
|
extern void nfs_writeback_done(struct rpc_task *task);
|
|
|
|
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
|
|
extern void nfs_commit_done(struct rpc_task *);
|
|
#endif
|
|
|
|
/*
|
|
* Try to write back everything synchronously (but check the
|
|
* return value!)
|
|
*/
|
|
extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int);
|
|
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
|
|
extern int nfs_commit_inode(struct inode *, unsigned long, unsigned int, int);
|
|
#else
|
|
static inline int
|
|
nfs_commit_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static inline int
|
|
nfs_have_writebacks(struct inode *inode)
|
|
{
|
|
return NFS_I(inode)->npages != 0;
|
|
}
|
|
|
|
static inline int
|
|
nfs_wb_all(struct inode *inode)
|
|
{
|
|
int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT);
|
|
return (error < 0) ? error : 0;
|
|
}
|
|
|
|
/*
|
|
* Write back all requests on one page - we do this before reading it.
|
|
*/
|
|
static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how)
|
|
{
|
|
int error = nfs_sync_inode(inode, page->index, 1,
|
|
how | FLUSH_WAIT | FLUSH_STABLE);
|
|
return (error < 0) ? error : 0;
|
|
}
|
|
|
|
static inline int nfs_wb_page(struct inode *inode, struct page* page)
|
|
{
|
|
return nfs_wb_page_priority(inode, page, 0);
|
|
}
|
|
|
|
/*
|
|
* Allocate and free nfs_write_data structures
|
|
*/
|
|
extern mempool_t *nfs_wdata_mempool;
|
|
|
|
static inline struct nfs_write_data *nfs_writedata_alloc(void)
|
|
{
|
|
struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS);
|
|
if (p) {
|
|
memset(p, 0, sizeof(*p));
|
|
INIT_LIST_HEAD(&p->pages);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static inline void nfs_writedata_free(struct nfs_write_data *p)
|
|
{
|
|
mempool_free(p, nfs_wdata_mempool);
|
|
}
|
|
|
|
/* Hack for future NFS swap support */
|
|
#ifndef IS_SWAPFILE
|
|
# define IS_SWAPFILE(inode) (0)
|
|
#endif
|
|
|
|
/*
|
|
* linux/fs/nfs/read.c
|
|
*/
|
|
extern int nfs_readpage(struct file *, struct page *);
|
|
extern int nfs_readpages(struct file *, struct address_space *,
|
|
struct list_head *, unsigned);
|
|
extern void nfs_readpage_result(struct rpc_task *);
|
|
|
|
/*
|
|
* Allocate and free nfs_read_data structures
|
|
*/
|
|
extern mempool_t *nfs_rdata_mempool;
|
|
|
|
static inline struct nfs_read_data *nfs_readdata_alloc(void)
|
|
{
|
|
struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS);
|
|
if (p)
|
|
memset(p, 0, sizeof(*p));
|
|
return p;
|
|
}
|
|
|
|
static inline void nfs_readdata_free(struct nfs_read_data *p)
|
|
{
|
|
mempool_free(p, nfs_rdata_mempool);
|
|
}
|
|
|
|
extern void nfs_readdata_release(struct rpc_task *task);
|
|
|
|
/*
|
|
* linux/fs/mount_clnt.c
|
|
* (Used only by nfsroot module)
|
|
*/
|
|
extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
|
|
int, int);
|
|
|
|
/*
|
|
* inline functions
|
|
*/
|
|
|
|
static inline loff_t
|
|
nfs_size_to_loff_t(__u64 size)
|
|
{
|
|
loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
|
|
if (size > maxsz)
|
|
return maxsz;
|
|
return (loff_t) size;
|
|
}
|
|
|
|
static inline ino_t
|
|
nfs_fileid_to_ino_t(u64 fileid)
|
|
{
|
|
ino_t ino = (ino_t) fileid;
|
|
if (sizeof(ino_t) < sizeof(u64))
|
|
ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
|
|
return ino;
|
|
}
|
|
|
|
/* NFS root */
|
|
|
|
extern void * nfs_root_data(void);
|
|
|
|
#define nfs_wait_event(clnt, wq, condition) \
|
|
({ \
|
|
int __retval = 0; \
|
|
if (clnt->cl_intr) { \
|
|
sigset_t oldmask; \
|
|
rpc_clnt_sigmask(clnt, &oldmask); \
|
|
__retval = wait_event_interruptible(wq, condition); \
|
|
rpc_clnt_sigunmask(clnt, &oldmask); \
|
|
} else \
|
|
wait_event(wq, condition); \
|
|
__retval; \
|
|
})
|
|
|
|
#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
|
|
|
|
#ifdef CONFIG_NFS_V4
|
|
|
|
struct idmap;
|
|
|
|
/*
|
|
* In a seqid-mutating op, this macro controls which error return
|
|
* values trigger incrementation of the seqid.
|
|
*
|
|
* from rfc 3010:
|
|
* The client MUST monotonically increment the sequence number for the
|
|
* CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
|
|
* operations. This is true even in the event that the previous
|
|
* operation that used the sequence number received an error. The only
|
|
* exception to this rule is if the previous operation received one of
|
|
* the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
|
|
* NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
|
|
* NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
|
|
*
|
|
*/
|
|
#define seqid_mutating_err(err) \
|
|
(((err) != NFSERR_STALE_CLIENTID) && \
|
|
((err) != NFSERR_STALE_STATEID) && \
|
|
((err) != NFSERR_BAD_STATEID) && \
|
|
((err) != NFSERR_BAD_SEQID) && \
|
|
((err) != NFSERR_BAD_XDR) && \
|
|
((err) != NFSERR_RESOURCE) && \
|
|
((err) != NFSERR_NOFILEHANDLE))
|
|
|
|
enum nfs4_client_state {
|
|
NFS4CLNT_OK = 0,
|
|
};
|
|
|
|
/*
|
|
* The nfs4_client identifies our client state to the server.
|
|
*/
|
|
struct nfs4_client {
|
|
struct list_head cl_servers; /* Global list of servers */
|
|
struct in_addr cl_addr; /* Server identifier */
|
|
u64 cl_clientid; /* constant */
|
|
nfs4_verifier cl_confirm;
|
|
unsigned long cl_state;
|
|
|
|
u32 cl_lockowner_id;
|
|
|
|
/*
|
|
* The following rwsem ensures exclusive access to the server
|
|
* while we recover the state following a lease expiration.
|
|
*/
|
|
struct rw_semaphore cl_sem;
|
|
|
|
struct list_head cl_delegations;
|
|
struct list_head cl_state_owners;
|
|
struct list_head cl_unused;
|
|
int cl_nunused;
|
|
spinlock_t cl_lock;
|
|
atomic_t cl_count;
|
|
|
|
struct rpc_clnt * cl_rpcclient;
|
|
struct rpc_cred * cl_cred;
|
|
|
|
struct list_head cl_superblocks; /* List of nfs_server structs */
|
|
|
|
unsigned long cl_lease_time;
|
|
unsigned long cl_last_renewal;
|
|
struct work_struct cl_renewd;
|
|
struct work_struct cl_recoverd;
|
|
|
|
wait_queue_head_t cl_waitq;
|
|
struct rpc_wait_queue cl_rpcwaitq;
|
|
|
|
/* used for the setclientid verifier */
|
|
struct timespec cl_boot_time;
|
|
|
|
/* idmapper */
|
|
struct idmap * cl_idmap;
|
|
|
|
/* Our own IP address, as a null-terminated string.
|
|
* This is used to generate the clientid, and the callback address.
|
|
*/
|
|
char cl_ipaddr[16];
|
|
unsigned char cl_id_uniquifier;
|
|
};
|
|
|
|
/*
|
|
* NFS4 state_owners and lock_owners are simply labels for ordered
|
|
* sequences of RPC calls. Their sole purpose is to provide once-only
|
|
* semantics by allowing the server to identify replayed requests.
|
|
*
|
|
* The ->so_sema is held during all state_owner seqid-mutating operations:
|
|
* OPEN, OPEN_DOWNGRADE, and CLOSE. Its purpose is to properly serialize
|
|
* so_seqid.
|
|
*/
|
|
struct nfs4_state_owner {
|
|
struct list_head so_list; /* per-clientid list of state_owners */
|
|
struct nfs4_client *so_client;
|
|
u32 so_id; /* 32-bit identifier, unique */
|
|
struct semaphore so_sema;
|
|
u32 so_seqid; /* protected by so_sema */
|
|
atomic_t so_count;
|
|
|
|
struct rpc_cred *so_cred; /* Associated cred */
|
|
struct list_head so_states;
|
|
struct list_head so_delegations;
|
|
};
|
|
|
|
/*
|
|
* struct nfs4_state maintains the client-side state for a given
|
|
* (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
|
|
*
|
|
* OPEN:
|
|
* In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
|
|
* we need to know how many files are open for reading or writing on a
|
|
* given inode. This information too is stored here.
|
|
*
|
|
* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
|
|
*/
|
|
|
|
struct nfs4_lock_state {
|
|
struct list_head ls_locks; /* Other lock stateids */
|
|
fl_owner_t ls_owner; /* POSIX lock owner */
|
|
#define NFS_LOCK_INITIALIZED 1
|
|
int ls_flags;
|
|
u32 ls_seqid;
|
|
u32 ls_id;
|
|
nfs4_stateid ls_stateid;
|
|
atomic_t ls_count;
|
|
};
|
|
|
|
/* bits for nfs4_state->flags */
|
|
enum {
|
|
LK_STATE_IN_USE,
|
|
NFS_DELEGATED_STATE,
|
|
};
|
|
|
|
struct nfs4_state {
|
|
struct list_head open_states; /* List of states for the same state_owner */
|
|
struct list_head inode_states; /* List of states for the same inode */
|
|
struct list_head lock_states; /* List of subservient lock stateids */
|
|
|
|
struct nfs4_state_owner *owner; /* Pointer to the open owner */
|
|
struct inode *inode; /* Pointer to the inode */
|
|
|
|
unsigned long flags; /* Do we hold any locks? */
|
|
struct semaphore lock_sema; /* Serializes file locking operations */
|
|
rwlock_t state_lock; /* Protects the lock_states list */
|
|
|
|
nfs4_stateid stateid;
|
|
|
|
unsigned int nreaders;
|
|
unsigned int nwriters;
|
|
int state; /* State on the server (R,W, or RW) */
|
|
atomic_t count;
|
|
};
|
|
|
|
|
|
struct nfs4_exception {
|
|
long timeout;
|
|
int retry;
|
|
};
|
|
|
|
struct nfs4_state_recovery_ops {
|
|
int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
|
|
int (*recover_lock)(struct nfs4_state *, struct file_lock *);
|
|
};
|
|
|
|
extern struct dentry_operations nfs4_dentry_operations;
|
|
extern struct inode_operations nfs4_dir_inode_operations;
|
|
|
|
/* nfs4proc.c */
|
|
extern int nfs4_map_errors(int err);
|
|
extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short);
|
|
extern int nfs4_proc_setclientid_confirm(struct nfs4_client *);
|
|
extern int nfs4_proc_async_renew(struct nfs4_client *);
|
|
extern int nfs4_proc_renew(struct nfs4_client *);
|
|
extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode);
|
|
extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
|
|
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int);
|
|
|
|
extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
|
|
extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;
|
|
|
|
/* nfs4renewd.c */
|
|
extern void nfs4_schedule_state_renewal(struct nfs4_client *);
|
|
extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
|
|
extern void nfs4_kill_renewd(struct nfs4_client *);
|
|
|
|
/* nfs4state.c */
|
|
extern void init_nfsv4_state(struct nfs_server *);
|
|
extern void destroy_nfsv4_state(struct nfs_server *);
|
|
extern struct nfs4_client *nfs4_get_client(struct in_addr *);
|
|
extern void nfs4_put_client(struct nfs4_client *clp);
|
|
extern int nfs4_init_client(struct nfs4_client *clp);
|
|
extern struct nfs4_client *nfs4_find_client(struct in_addr *);
|
|
extern u32 nfs4_alloc_lockowner_id(struct nfs4_client *);
|
|
|
|
extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
|
|
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
|
|
extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
|
|
extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
|
|
extern void nfs4_put_open_state(struct nfs4_state *);
|
|
extern void nfs4_close_state(struct nfs4_state *, mode_t);
|
|
extern struct nfs4_state *nfs4_find_state(struct inode *, struct rpc_cred *, mode_t mode);
|
|
extern void nfs4_increment_seqid(int status, struct nfs4_state_owner *sp);
|
|
extern void nfs4_schedule_state_recovery(struct nfs4_client *);
|
|
extern struct nfs4_lock_state *nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t);
|
|
extern struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t);
|
|
extern void nfs4_put_lock_state(struct nfs4_lock_state *state);
|
|
extern void nfs4_increment_lock_seqid(int status, struct nfs4_lock_state *ls);
|
|
extern void nfs4_notify_setlk(struct nfs4_state *, struct file_lock *, struct nfs4_lock_state *);
|
|
extern void nfs4_notify_unlck(struct nfs4_state *, struct file_lock *, struct nfs4_lock_state *);
|
|
extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
|
|
|
|
|
|
|
|
struct nfs4_mount_data;
|
|
#else
|
|
#define init_nfsv4_state(server) do { } while (0)
|
|
#define destroy_nfsv4_state(server) do { } while (0)
|
|
#define nfs4_put_state_owner(inode, owner) do { } while (0)
|
|
#define nfs4_put_open_state(state) do { } while (0)
|
|
#define nfs4_close_state(a, b) do { } while (0)
|
|
#define nfs4_renewd_prepare_shutdown(server) do { } while (0)
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
/*
|
|
* NFS debug flags
|
|
*/
|
|
#define NFSDBG_VFS 0x0001
|
|
#define NFSDBG_DIRCACHE 0x0002
|
|
#define NFSDBG_LOOKUPCACHE 0x0004
|
|
#define NFSDBG_PAGECACHE 0x0008
|
|
#define NFSDBG_PROC 0x0010
|
|
#define NFSDBG_XDR 0x0020
|
|
#define NFSDBG_FILE 0x0040
|
|
#define NFSDBG_ROOT 0x0080
|
|
#define NFSDBG_CALLBACK 0x0100
|
|
#define NFSDBG_ALL 0xFFFF
|
|
|
|
#ifdef __KERNEL__
|
|
# undef ifdebug
|
|
# ifdef NFS_DEBUG
|
|
# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
|
|
# else
|
|
# define ifdebug(fac) if (0)
|
|
# endif
|
|
#endif /* __KERNEL */
|
|
|
|
#endif
|