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651 lines
21 KiB
651 lines
21 KiB
/* |
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* NFS internal definitions |
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*/ |
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|
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#include "nfs4_fs.h" |
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#include <linux/mount.h> |
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#include <linux/security.h> |
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#include <linux/crc32.h> |
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#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) |
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struct nfs_string; |
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/* Maximum number of readahead requests |
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* FIXME: this should really be a sysctl so that users may tune it to suit |
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* their needs. People that do NFS over a slow network, might for |
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* instance want to reduce it to something closer to 1 for improved |
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* interactive response. |
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*/ |
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#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) |
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static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) |
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{ |
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if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) |
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fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; |
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} |
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static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) |
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{ |
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if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || |
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(((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && |
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((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) |
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return 0; |
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fattr->fileid = fattr->mounted_on_fileid; |
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return 1; |
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} |
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struct nfs_clone_mount { |
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const struct super_block *sb; |
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const struct dentry *dentry; |
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struct nfs_fh *fh; |
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struct nfs_fattr *fattr; |
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char *hostname; |
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char *mnt_path; |
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struct sockaddr *addr; |
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size_t addrlen; |
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rpc_authflavor_t authflavor; |
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}; |
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/* |
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* Note: RFC 1813 doesn't limit the number of auth flavors that |
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* a server can return, so make something up. |
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*/ |
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#define NFS_MAX_SECFLAVORS (12) |
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/* |
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* Value used if the user did not specify a port value. |
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*/ |
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#define NFS_UNSPEC_PORT (-1) |
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/* |
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* Maximum number of pages that readdir can use for creating |
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* a vmapped array of pages. |
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*/ |
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#define NFS_MAX_READDIR_PAGES 8 |
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struct nfs_client_initdata { |
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unsigned long init_flags; |
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const char *hostname; |
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const struct sockaddr *addr; |
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size_t addrlen; |
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struct nfs_subversion *nfs_mod; |
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int proto; |
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u32 minorversion; |
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struct net *net; |
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}; |
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/* |
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* In-kernel mount arguments |
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*/ |
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struct nfs_parsed_mount_data { |
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int flags; |
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unsigned int rsize, wsize; |
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unsigned int timeo, retrans; |
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unsigned int acregmin, acregmax, |
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acdirmin, acdirmax; |
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unsigned int namlen; |
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unsigned int options; |
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unsigned int bsize; |
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struct nfs_auth_info auth_info; |
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rpc_authflavor_t selected_flavor; |
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char *client_address; |
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unsigned int version; |
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unsigned int minorversion; |
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char *fscache_uniq; |
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bool need_mount; |
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struct { |
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struct sockaddr_storage address; |
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size_t addrlen; |
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char *hostname; |
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u32 version; |
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int port; |
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unsigned short protocol; |
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} mount_server; |
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struct { |
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struct sockaddr_storage address; |
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size_t addrlen; |
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char *hostname; |
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char *export_path; |
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int port; |
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unsigned short protocol; |
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} nfs_server; |
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struct security_mnt_opts lsm_opts; |
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struct net *net; |
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}; |
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/* mount_clnt.c */ |
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struct nfs_mount_request { |
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struct sockaddr *sap; |
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size_t salen; |
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char *hostname; |
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char *dirpath; |
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u32 version; |
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unsigned short protocol; |
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struct nfs_fh *fh; |
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int noresvport; |
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unsigned int *auth_flav_len; |
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rpc_authflavor_t *auth_flavs; |
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struct net *net; |
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}; |
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struct nfs_mount_info { |
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void (*fill_super)(struct super_block *, struct nfs_mount_info *); |
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int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); |
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struct nfs_parsed_mount_data *parsed; |
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struct nfs_clone_mount *cloned; |
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struct nfs_fh *mntfh; |
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}; |
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extern int nfs_mount(struct nfs_mount_request *info); |
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extern void nfs_umount(const struct nfs_mount_request *info); |
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/* client.c */ |
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extern const struct rpc_program nfs_program; |
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extern void nfs_clients_init(struct net *net); |
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extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); |
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int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); |
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struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, |
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const struct rpc_timeout *, const char *, |
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rpc_authflavor_t); |
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int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); |
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void nfs_server_insert_lists(struct nfs_server *); |
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void nfs_server_remove_lists(struct nfs_server *); |
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void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); |
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int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, |
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rpc_authflavor_t); |
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struct nfs_server *nfs_alloc_server(void); |
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void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); |
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extern void nfs_cleanup_cb_ident_idr(struct net *); |
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extern void nfs_put_client(struct nfs_client *); |
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extern void nfs_free_client(struct nfs_client *); |
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extern struct nfs_client *nfs4_find_client_ident(struct net *, int); |
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extern struct nfs_client * |
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nfs4_find_client_sessionid(struct net *, const struct sockaddr *, |
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struct nfs4_sessionid *, u32); |
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extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, |
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struct nfs_subversion *); |
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extern struct nfs_server *nfs4_create_server( |
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struct nfs_mount_info *, |
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struct nfs_subversion *); |
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extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
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struct nfs_fh *); |
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extern int nfs4_update_server(struct nfs_server *server, const char *hostname, |
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struct sockaddr *sap, size_t salen, |
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struct net *net); |
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extern void nfs_free_server(struct nfs_server *server); |
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extern struct nfs_server *nfs_clone_server(struct nfs_server *, |
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struct nfs_fh *, |
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struct nfs_fattr *, |
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rpc_authflavor_t); |
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extern int nfs_wait_client_init_complete(const struct nfs_client *clp); |
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extern void nfs_mark_client_ready(struct nfs_client *clp, int state); |
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extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, |
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const struct sockaddr *ds_addr, |
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int ds_addrlen, int ds_proto, |
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unsigned int ds_timeo, |
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unsigned int ds_retrans); |
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extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, |
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struct inode *); |
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#ifdef CONFIG_PROC_FS |
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extern int __init nfs_fs_proc_init(void); |
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extern void nfs_fs_proc_exit(void); |
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extern int nfs_fs_proc_net_init(struct net *net); |
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extern void nfs_fs_proc_net_exit(struct net *net); |
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#else |
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static inline int nfs_fs_proc_net_init(struct net *net) |
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{ |
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return 0; |
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} |
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static inline void nfs_fs_proc_net_exit(struct net *net) |
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{ |
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} |
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static inline int nfs_fs_proc_init(void) |
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{ |
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return 0; |
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} |
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static inline void nfs_fs_proc_exit(void) |
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{ |
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} |
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#endif |
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#ifdef CONFIG_NFS_V4_1 |
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int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); |
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#endif |
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/* callback_xdr.c */ |
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extern struct svc_version nfs4_callback_version1; |
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extern struct svc_version nfs4_callback_version4; |
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struct nfs_pageio_descriptor; |
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/* pagelist.c */ |
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extern int __init nfs_init_nfspagecache(void); |
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extern void nfs_destroy_nfspagecache(void); |
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extern int __init nfs_init_readpagecache(void); |
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extern void nfs_destroy_readpagecache(void); |
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extern int __init nfs_init_writepagecache(void); |
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extern void nfs_destroy_writepagecache(void); |
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extern int __init nfs_init_directcache(void); |
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extern void nfs_destroy_directcache(void); |
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extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, |
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struct nfs_pgio_header *hdr, |
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void (*release)(struct nfs_pgio_header *hdr)); |
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void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); |
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int nfs_iocounter_wait(struct nfs_io_counter *c); |
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extern const struct nfs_pageio_ops nfs_pgio_rw_ops; |
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struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); |
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void nfs_pgio_header_free(struct nfs_pgio_header *); |
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void nfs_pgio_data_destroy(struct nfs_pgio_header *); |
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int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); |
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int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_header *, |
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const struct rpc_call_ops *, int, int); |
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void nfs_free_request(struct nfs_page *req); |
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static inline void nfs_iocounter_init(struct nfs_io_counter *c) |
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{ |
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c->flags = 0; |
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atomic_set(&c->io_count, 0); |
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} |
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/* nfs2xdr.c */ |
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extern struct rpc_procinfo nfs_procedures[]; |
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extern int nfs2_decode_dirent(struct xdr_stream *, |
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struct nfs_entry *, int); |
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/* nfs3xdr.c */ |
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extern struct rpc_procinfo nfs3_procedures[]; |
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extern int nfs3_decode_dirent(struct xdr_stream *, |
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struct nfs_entry *, int); |
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/* nfs4xdr.c */ |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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extern int nfs4_decode_dirent(struct xdr_stream *, |
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struct nfs_entry *, int); |
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#endif |
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#ifdef CONFIG_NFS_V4_1 |
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extern const u32 nfs41_maxread_overhead; |
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extern const u32 nfs41_maxwrite_overhead; |
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extern const u32 nfs41_maxgetdevinfo_overhead; |
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#endif |
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/* nfs4proc.c */ |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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extern struct rpc_procinfo nfs4_procedures[]; |
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#endif |
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#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
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extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); |
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static inline void nfs4_label_free(struct nfs4_label *label) |
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{ |
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if (label) { |
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kfree(label->label); |
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kfree(label); |
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} |
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return; |
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} |
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static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) |
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{ |
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if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) |
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nfsi->cache_validity |= NFS_INO_INVALID_LABEL; |
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} |
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#else |
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static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } |
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static inline void nfs4_label_free(void *label) {} |
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static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) |
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{ |
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} |
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#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ |
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/* proc.c */ |
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void nfs_close_context(struct nfs_open_context *ctx, int is_sync); |
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extern struct nfs_client *nfs_init_client(struct nfs_client *clp, |
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const struct rpc_timeout *timeparms, |
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const char *ip_addr); |
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/* dir.c */ |
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extern void nfs_force_use_readdirplus(struct inode *dir); |
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extern unsigned long nfs_access_cache_count(struct shrinker *shrink, |
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struct shrink_control *sc); |
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extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, |
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struct shrink_control *sc); |
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struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); |
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int nfs_create(struct inode *, struct dentry *, umode_t, bool); |
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int nfs_mkdir(struct inode *, struct dentry *, umode_t); |
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int nfs_rmdir(struct inode *, struct dentry *); |
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int nfs_unlink(struct inode *, struct dentry *); |
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int nfs_symlink(struct inode *, struct dentry *, const char *); |
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int nfs_link(struct dentry *, struct inode *, struct dentry *); |
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int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); |
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int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); |
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/* file.c */ |
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int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); |
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loff_t nfs_file_llseek(struct file *, loff_t, int); |
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int nfs_file_flush(struct file *, fl_owner_t); |
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ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); |
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ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, |
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size_t, unsigned int); |
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int nfs_file_mmap(struct file *, struct vm_area_struct *); |
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ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); |
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int nfs_file_release(struct inode *, struct file *); |
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int nfs_lock(struct file *, int, struct file_lock *); |
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int nfs_flock(struct file *, int, struct file_lock *); |
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int nfs_check_flags(int); |
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/* inode.c */ |
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extern struct workqueue_struct *nfsiod_workqueue; |
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extern struct inode *nfs_alloc_inode(struct super_block *sb); |
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extern void nfs_destroy_inode(struct inode *); |
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extern int nfs_write_inode(struct inode *, struct writeback_control *); |
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extern int nfs_drop_inode(struct inode *); |
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extern void nfs_clear_inode(struct inode *); |
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extern void nfs_evict_inode(struct inode *); |
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void nfs_zap_acl_cache(struct inode *inode); |
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extern int nfs_wait_bit_killable(struct wait_bit_key *key); |
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/* super.c */ |
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extern const struct super_operations nfs_sops; |
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extern struct file_system_type nfs_fs_type; |
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extern struct file_system_type nfs_xdev_fs_type; |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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extern struct file_system_type nfs4_xdev_fs_type; |
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extern struct file_system_type nfs4_referral_fs_type; |
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#endif |
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bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); |
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struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, |
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struct nfs_subversion *); |
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void nfs_initialise_sb(struct super_block *); |
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int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); |
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int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); |
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struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, |
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struct nfs_mount_info *, struct nfs_subversion *); |
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struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); |
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struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, |
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const char *, struct nfs_mount_info *); |
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void nfs_kill_super(struct super_block *); |
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void nfs_fill_super(struct super_block *, struct nfs_mount_info *); |
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extern struct rpc_stat nfs_rpcstat; |
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extern int __init register_nfs_fs(void); |
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extern void __exit unregister_nfs_fs(void); |
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extern bool nfs_sb_active(struct super_block *sb); |
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extern void nfs_sb_deactive(struct super_block *sb); |
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/* namespace.c */ |
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#define NFS_PATH_CANONICAL 1 |
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extern char *nfs_path(char **p, struct dentry *dentry, |
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char *buffer, ssize_t buflen, unsigned flags); |
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extern struct vfsmount *nfs_d_automount(struct path *path); |
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struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, |
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struct nfs_fh *, struct nfs_fattr *); |
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struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, |
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struct nfs_fattr *, rpc_authflavor_t); |
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|
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/* getroot.c */ |
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extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, |
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const char *); |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, |
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const char *); |
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extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); |
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#endif |
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struct nfs_pgio_completion_ops; |
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/* read.c */ |
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extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, |
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struct inode *inode, bool force_mds, |
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const struct nfs_pgio_completion_ops *compl_ops); |
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extern void nfs_read_prepare(struct rpc_task *task, void *calldata); |
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extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); |
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|
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/* super.c */ |
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void nfs_clone_super(struct super_block *, struct nfs_mount_info *); |
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void nfs_umount_begin(struct super_block *); |
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int nfs_statfs(struct dentry *, struct kstatfs *); |
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int nfs_show_options(struct seq_file *, struct dentry *); |
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int nfs_show_devname(struct seq_file *, struct dentry *); |
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int nfs_show_path(struct seq_file *, struct dentry *); |
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int nfs_show_stats(struct seq_file *, struct dentry *); |
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void nfs_put_super(struct super_block *); |
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int nfs_remount(struct super_block *sb, int *flags, char *raw_data); |
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|
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/* write.c */ |
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extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
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struct inode *inode, int ioflags, bool force_mds, |
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const struct nfs_pgio_completion_ops *compl_ops); |
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extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); |
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extern void nfs_commit_free(struct nfs_commit_data *p); |
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extern void nfs_write_prepare(struct rpc_task *task, void *calldata); |
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extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); |
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extern int nfs_initiate_commit(struct rpc_clnt *clnt, |
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struct nfs_commit_data *data, |
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const struct rpc_call_ops *call_ops, |
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int how, int flags); |
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extern void nfs_init_commit(struct nfs_commit_data *data, |
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struct list_head *head, |
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struct pnfs_layout_segment *lseg, |
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struct nfs_commit_info *cinfo); |
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int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
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struct nfs_commit_info *cinfo, int max); |
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unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); |
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int nfs_scan_commit(struct inode *inode, struct list_head *dst, |
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struct nfs_commit_info *cinfo); |
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void nfs_mark_request_commit(struct nfs_page *req, |
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struct pnfs_layout_segment *lseg, |
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struct nfs_commit_info *cinfo); |
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int nfs_write_need_commit(struct nfs_pgio_header *); |
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int nfs_generic_commit_list(struct inode *inode, struct list_head *head, |
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int how, struct nfs_commit_info *cinfo); |
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void nfs_retry_commit(struct list_head *page_list, |
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struct pnfs_layout_segment *lseg, |
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struct nfs_commit_info *cinfo); |
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void nfs_commitdata_release(struct nfs_commit_data *data); |
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void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
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struct nfs_commit_info *cinfo); |
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void nfs_request_remove_commit_list(struct nfs_page *req, |
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struct nfs_commit_info *cinfo); |
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void nfs_init_cinfo(struct nfs_commit_info *cinfo, |
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struct inode *inode, |
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struct nfs_direct_req *dreq); |
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int nfs_key_timeout_notify(struct file *filp, struct inode *inode); |
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bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); |
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|
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#ifdef CONFIG_MIGRATION |
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extern int nfs_migrate_page(struct address_space *, |
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struct page *, struct page *, enum migrate_mode); |
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#else |
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#define nfs_migrate_page NULL |
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#endif |
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|
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/* unlink.c */ |
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extern struct rpc_task * |
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nfs_async_rename(struct inode *old_dir, struct inode *new_dir, |
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struct dentry *old_dentry, struct dentry *new_dentry, |
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void (*complete)(struct rpc_task *, struct nfs_renamedata *)); |
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extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); |
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|
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/* direct.c */ |
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void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, |
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struct nfs_direct_req *dreq); |
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static inline void nfs_inode_dio_wait(struct inode *inode) |
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{ |
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inode_dio_wait(inode); |
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} |
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extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
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|
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/* nfs4proc.c */ |
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extern void __nfs4_read_done_cb(struct nfs_pgio_header *); |
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extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
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const struct rpc_timeout *timeparms, |
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const char *ip_addr); |
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extern int nfs40_walk_client_list(struct nfs_client *clp, |
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struct nfs_client **result, |
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struct rpc_cred *cred); |
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extern int nfs41_walk_client_list(struct nfs_client *clp, |
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struct nfs_client **result, |
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struct rpc_cred *cred); |
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|
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static inline struct inode *nfs_igrab_and_active(struct inode *inode) |
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{ |
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inode = igrab(inode); |
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if (inode != NULL && !nfs_sb_active(inode->i_sb)) { |
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iput(inode); |
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inode = NULL; |
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} |
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return inode; |
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} |
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|
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static inline void nfs_iput_and_deactive(struct inode *inode) |
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{ |
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if (inode != NULL) { |
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struct super_block *sb = inode->i_sb; |
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|
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iput(inode); |
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nfs_sb_deactive(sb); |
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} |
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} |
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|
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/* |
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* Determine the device name as a string |
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*/ |
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static inline char *nfs_devname(struct dentry *dentry, |
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char *buffer, ssize_t buflen) |
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{ |
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char *dummy; |
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return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); |
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} |
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|
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/* |
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* Determine the actual block size (and log2 thereof) |
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*/ |
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static inline |
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unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) |
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{ |
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/* make sure blocksize is a power of two */ |
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if ((bsize & (bsize - 1)) || nrbitsp) { |
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unsigned char nrbits; |
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|
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for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) |
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; |
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bsize = 1 << nrbits; |
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if (nrbitsp) |
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*nrbitsp = nrbits; |
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} |
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|
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return bsize; |
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} |
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|
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/* |
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* Calculate the number of 512byte blocks used. |
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*/ |
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static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
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{ |
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blkcnt_t used = (tsize + 511) >> 9; |
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return (used > ULONG_MAX) ? ULONG_MAX : used; |
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} |
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|
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/* |
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* Compute and set NFS server blocksize |
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*/ |
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static inline |
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unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) |
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{ |
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if (bsize < NFS_MIN_FILE_IO_SIZE) |
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bsize = NFS_DEF_FILE_IO_SIZE; |
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else if (bsize >= NFS_MAX_FILE_IO_SIZE) |
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bsize = NFS_MAX_FILE_IO_SIZE; |
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|
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return nfs_block_bits(bsize, nrbitsp); |
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} |
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|
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/* |
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* Determine the maximum file size for a superblock |
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*/ |
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static inline |
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void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) |
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{ |
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sb->s_maxbytes = (loff_t)maxfilesize; |
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if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) |
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sb->s_maxbytes = MAX_LFS_FILESIZE; |
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} |
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|
|
/* |
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* Determine the number of bytes of data the page contains |
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*/ |
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static inline |
|
unsigned int nfs_page_length(struct page *page) |
|
{ |
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loff_t i_size = i_size_read(page_file_mapping(page)->host); |
|
|
|
if (i_size > 0) { |
|
pgoff_t page_index = page_file_index(page); |
|
pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; |
|
if (page_index < end_index) |
|
return PAGE_CACHE_SIZE; |
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if (page_index == end_index) |
|
return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; |
|
} |
|
return 0; |
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} |
|
|
|
/* |
|
* Convert a umode to a dirent->d_type |
|
*/ |
|
static inline |
|
unsigned char nfs_umode_to_dtype(umode_t mode) |
|
{ |
|
return (mode >> 12) & 15; |
|
} |
|
|
|
/* |
|
* Determine the number of pages in an array of length 'len' and |
|
* with a base offset of 'base' |
|
*/ |
|
static inline |
|
unsigned int nfs_page_array_len(unsigned int base, size_t len) |
|
{ |
|
return ((unsigned long)len + (unsigned long)base + |
|
PAGE_SIZE - 1) >> PAGE_SHIFT; |
|
} |
|
|
|
/* |
|
* Convert a struct timespec into a 64-bit change attribute |
|
* |
|
* This does approximately the same thing as timespec_to_ns(), |
|
* but for calculation efficiency, we multiply the seconds by |
|
* 1024*1024*1024. |
|
*/ |
|
static inline |
|
u64 nfs_timespec_to_change_attr(const struct timespec *ts) |
|
{ |
|
return ((u64)ts->tv_sec << 30) + ts->tv_nsec; |
|
} |
|
|
|
#ifdef CONFIG_CRC32 |
|
/** |
|
* nfs_fhandle_hash - calculate the crc32 hash for the filehandle |
|
* @fh - pointer to filehandle |
|
* |
|
* returns a crc32 hash for the filehandle that is compatible with |
|
* the one displayed by "wireshark". |
|
*/ |
|
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
|
{ |
|
return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); |
|
} |
|
#else |
|
static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
|
{ |
|
return 0; |
|
} |
|
#endif
|
|
|