368 lines
9.3 KiB
C
368 lines
9.3 KiB
C
/*
|
|
* NFS internal definitions
|
|
*/
|
|
|
|
#include <linux/mount.h>
|
|
#include <linux/security.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)
|
|
|
|
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;
|
|
};
|
|
|
|
/*
|
|
* In-kernel mount arguments
|
|
*/
|
|
struct nfs_parsed_mount_data {
|
|
int flags;
|
|
int rsize, wsize;
|
|
int timeo, retrans;
|
|
int acregmin, acregmax,
|
|
acdirmin, acdirmax;
|
|
int namlen;
|
|
unsigned int options;
|
|
unsigned int bsize;
|
|
unsigned int auth_flavor_len;
|
|
rpc_authflavor_t auth_flavors[1];
|
|
char *client_address;
|
|
unsigned int minorversion;
|
|
char *fscache_uniq;
|
|
|
|
struct {
|
|
struct sockaddr_storage address;
|
|
size_t addrlen;
|
|
char *hostname;
|
|
u32 version;
|
|
unsigned short port;
|
|
unsigned short protocol;
|
|
} mount_server;
|
|
|
|
struct {
|
|
struct sockaddr_storage address;
|
|
size_t addrlen;
|
|
char *hostname;
|
|
char *export_path;
|
|
unsigned short port;
|
|
unsigned short protocol;
|
|
} nfs_server;
|
|
|
|
struct security_mnt_opts lsm_opts;
|
|
};
|
|
|
|
/* 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;
|
|
};
|
|
|
|
extern int nfs_mount(struct nfs_mount_request *info);
|
|
|
|
/* client.c */
|
|
extern struct rpc_program nfs_program;
|
|
|
|
extern void nfs_put_client(struct nfs_client *);
|
|
extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32);
|
|
extern struct nfs_client *nfs_find_client_next(struct nfs_client *);
|
|
extern struct nfs_server *nfs_create_server(
|
|
const struct nfs_parsed_mount_data *,
|
|
struct nfs_fh *);
|
|
extern struct nfs_server *nfs4_create_server(
|
|
const struct nfs_parsed_mount_data *,
|
|
struct nfs_fh *);
|
|
extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
|
|
struct nfs_fh *);
|
|
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 *);
|
|
extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
|
|
#ifdef CONFIG_PROC_FS
|
|
extern int __init nfs_fs_proc_init(void);
|
|
extern void nfs_fs_proc_exit(void);
|
|
#else
|
|
static inline int nfs_fs_proc_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void nfs_fs_proc_exit(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* nfs4namespace.c */
|
|
#ifdef CONFIG_NFS_V4
|
|
extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
|
|
#else
|
|
static inline
|
|
struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
|
|
{
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
#endif
|
|
|
|
/* callback_xdr.c */
|
|
extern struct svc_version nfs4_callback_version1;
|
|
|
|
/* 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);
|
|
|
|
/* nfs2xdr.c */
|
|
extern int nfs_stat_to_errno(int);
|
|
extern struct rpc_procinfo nfs_procedures[];
|
|
extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int);
|
|
|
|
/* nfs3xdr.c */
|
|
extern struct rpc_procinfo nfs3_procedures[];
|
|
extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int);
|
|
|
|
/* nfs4xdr.c */
|
|
#ifdef CONFIG_NFS_V4
|
|
extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
|
|
#endif
|
|
|
|
/* nfs4proc.c */
|
|
#ifdef CONFIG_NFS_V4
|
|
extern struct rpc_procinfo nfs4_procedures[];
|
|
#endif
|
|
|
|
/* proc.c */
|
|
void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
|
|
|
|
/* dir.c */
|
|
extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask);
|
|
|
|
/* 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 *,int);
|
|
extern void nfs_clear_inode(struct inode *);
|
|
#ifdef CONFIG_NFS_V4
|
|
extern void nfs4_clear_inode(struct inode *);
|
|
#endif
|
|
void nfs_zap_acl_cache(struct inode *inode);
|
|
extern int nfs_wait_bit_killable(void *word);
|
|
|
|
/* super.c */
|
|
void nfs_parse_ip_address(char *, size_t, struct sockaddr *, size_t *);
|
|
extern struct file_system_type nfs_xdev_fs_type;
|
|
#ifdef CONFIG_NFS_V4
|
|
extern struct file_system_type nfs4_xdev_fs_type;
|
|
extern struct file_system_type nfs4_referral_fs_type;
|
|
#endif
|
|
|
|
extern struct rpc_stat nfs_rpcstat;
|
|
|
|
extern int __init register_nfs_fs(void);
|
|
extern void __exit unregister_nfs_fs(void);
|
|
extern void nfs_sb_active(struct super_block *sb);
|
|
extern void nfs_sb_deactive(struct super_block *sb);
|
|
|
|
/* namespace.c */
|
|
extern char *nfs_path(const char *base,
|
|
const struct dentry *droot,
|
|
const struct dentry *dentry,
|
|
char *buffer, ssize_t buflen);
|
|
|
|
/* getroot.c */
|
|
extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *);
|
|
#ifdef CONFIG_NFS_V4
|
|
extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *);
|
|
|
|
extern int nfs4_path_walk(struct nfs_server *server,
|
|
struct nfs_fh *mntfh,
|
|
const char *path);
|
|
#endif
|
|
|
|
/* read.c */
|
|
extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
|
|
|
|
/* write.c */
|
|
extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
|
|
|
|
/* nfs4proc.c */
|
|
extern int _nfs4_call_sync(struct nfs_server *server,
|
|
struct rpc_message *msg,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
int cache_reply);
|
|
extern int _nfs4_call_sync_session(struct nfs_server *server,
|
|
struct rpc_message *msg,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
int cache_reply);
|
|
|
|
/*
|
|
* Determine if sessions are in use.
|
|
*/
|
|
static inline int nfs4_has_session(const struct nfs_client *clp)
|
|
{
|
|
#ifdef CONFIG_NFS_V4_1
|
|
if (clp->cl_session)
|
|
return 1;
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V4_1
|
|
extern void nfs41_sequence_free_slot(const struct nfs_client *,
|
|
struct nfs4_sequence_res *res);
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static inline void nfs4_sequence_free_slot(const struct nfs_client *clp,
|
|
struct nfs4_sequence_res *res)
|
|
{
|
|
#ifdef CONFIG_NFS_V4_1
|
|
if (nfs4_has_session(clp))
|
|
nfs41_sequence_free_slot(clp, res);
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
}
|
|
|
|
/*
|
|
* Determine the device name as a string
|
|
*/
|
|
static inline char *nfs_devname(const struct vfsmount *mnt_parent,
|
|
const struct dentry *dentry,
|
|
char *buffer, ssize_t buflen)
|
|
{
|
|
return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root,
|
|
dentry, buffer, buflen);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* 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->mapping->host);
|
|
|
|
if (i_size > 0) {
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
#define IPV6_SCOPE_DELIMITER '%'
|
|
|
|
/*
|
|
* Set the port number in an address. Be agnostic about the address
|
|
* family.
|
|
*/
|
|
static inline void nfs_set_port(struct sockaddr *sap, unsigned short port)
|
|
{
|
|
struct sockaddr_in *ap = (struct sockaddr_in *)sap;
|
|
struct sockaddr_in6 *ap6 = (struct sockaddr_in6 *)sap;
|
|
|
|
switch (sap->sa_family) {
|
|
case AF_INET:
|
|
ap->sin_port = htons(port);
|
|
break;
|
|
case AF_INET6:
|
|
ap6->sin6_port = htons(port);
|
|
break;
|
|
}
|
|
}
|