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834 lines
25 KiB
834 lines
25 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* NFS internal definitions |
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*/ |
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#include "nfs4_fs.h" |
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#include <linux/fs_context.h> |
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#include <linux/security.h> |
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#include <linux/crc32.h> |
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#include <linux/sunrpc/addr.h> |
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#include <linux/nfs_page.h> |
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#include <linux/wait_bit.h> |
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#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) |
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extern const struct export_operations nfs_export_ops; |
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struct nfs_string; |
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struct nfs_pageio_descriptor; |
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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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return 1; |
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} |
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static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry) |
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{ |
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if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL)) |
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return false; |
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if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size) |
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return false; |
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return true; |
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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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#define NFS_UNSPEC_RETRANS (UINT_MAX) |
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#define NFS_UNSPEC_TIMEO (UINT_MAX) |
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struct nfs_client_initdata { |
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unsigned long init_flags; |
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const char *hostname; /* Hostname of the server */ |
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const struct sockaddr *addr; /* Address of the server */ |
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const char *nodename; /* Hostname of the client */ |
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const char *ip_addr; /* IP address of the client */ |
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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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unsigned int nconnect; |
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struct net *net; |
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const struct rpc_timeout *timeparms; |
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const struct cred *cred; |
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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_fs_context { |
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bool internal; |
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bool skip_reconfig_option_check; |
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bool need_mount; |
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bool sloppy; |
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unsigned int flags; /* NFS{,4}_MOUNT_* 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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unsigned int 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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unsigned short protofamily; |
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unsigned short mountfamily; |
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bool has_sec_mnt_opts; |
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struct { |
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union { |
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struct sockaddr address; |
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struct sockaddr_storage _address; |
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}; |
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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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union { |
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struct sockaddr address; |
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struct sockaddr_storage _address; |
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}; |
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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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unsigned short nconnect; |
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unsigned short export_path_len; |
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} nfs_server; |
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struct nfs_fh *mntfh; |
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struct nfs_server *server; |
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struct nfs_subversion *nfs_mod; |
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/* Information for a cloned mount. */ |
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struct nfs_clone_mount { |
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struct super_block *sb; |
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struct dentry *dentry; |
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struct nfs_fattr *fattr; |
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unsigned int inherited_bsize; |
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} clone_data; |
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}; |
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#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ |
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errorf(fc, fmt, ## __VA_ARGS__) : \ |
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({ dprintk(fmt "\n", ## __VA_ARGS__); })) |
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#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ |
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errorf(fc, fmt, ## __VA_ARGS__) : \ |
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({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) |
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#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ |
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invalf(fc, fmt, ## __VA_ARGS__) : \ |
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({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) |
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#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ |
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invalf(fc, fmt, ## __VA_ARGS__) : \ |
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({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) |
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#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ |
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warnf(fc, fmt, ## __VA_ARGS__) : \ |
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({ dprintk(fmt "\n", ## __VA_ARGS__); })) |
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#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ |
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warnf(fc, fmt, ## __VA_ARGS__) : \ |
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({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) |
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static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) |
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{ |
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return fc->fs_private; |
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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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extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans); |
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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 void nfs_clients_exit(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 nfs_client_initdata *, rpc_authflavor_t); |
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struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); |
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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 *to, int proto, int timeo, int retrans); |
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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_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 fs_context *); |
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extern struct nfs_server *nfs4_create_server(struct fs_context *); |
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extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); |
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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 bool nfs_client_init_is_complete(const struct nfs_client *clp); |
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extern int nfs_client_init_status(const struct nfs_client *clp); |
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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_server *mds_srv, |
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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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u32 minor_version); |
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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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extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, |
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const struct sockaddr *ds_addr, int ds_addrlen, |
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int ds_proto, unsigned int ds_timeo, |
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unsigned int ds_retrans); |
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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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/* callback_xdr.c */ |
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extern const struct svc_version nfs4_callback_version1; |
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extern const struct svc_version nfs4_callback_version4; |
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/* fs_context.c */ |
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extern struct file_system_type nfs_fs_type; |
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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_lock_context *l_ctx); |
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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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int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); |
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int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, |
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const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, |
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const struct rpc_call_ops *call_ops, int how, int flags); |
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void nfs_free_request(struct nfs_page *req); |
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struct nfs_pgio_mirror * |
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nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); |
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static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, |
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const struct nfs_open_context *ctx2) |
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{ |
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return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; |
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} |
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/* nfs2xdr.c */ |
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extern const struct rpc_procinfo nfs_procedures[]; |
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extern int nfs2_decode_dirent(struct xdr_stream *, |
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struct nfs_entry *, bool); |
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/* nfs3xdr.c */ |
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extern const struct rpc_procinfo nfs3_procedures[]; |
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extern int nfs3_decode_dirent(struct xdr_stream *, |
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struct nfs_entry *, bool); |
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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 *, bool); |
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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 const 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 struct nfs4_label * |
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nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) |
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{ |
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if (!dst || !src) |
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return NULL; |
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if (src->len > NFS4_MAXLABELLEN) |
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return NULL; |
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dst->lfs = src->lfs; |
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dst->pi = src->pi; |
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dst->len = src->len; |
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memcpy(dst->label, src->label, src->len); |
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return dst; |
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} |
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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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static inline struct nfs4_label * |
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nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) |
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{ |
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return NULL; |
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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 nfs_client_initdata *); |
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/* dir.c */ |
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extern void nfs_advise_use_readdirplus(struct inode *dir); |
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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 user_namespace *, struct inode *, struct dentry *, |
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umode_t, bool); |
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int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *, |
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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 user_namespace *, struct inode *, struct dentry *, |
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const char *); |
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int nfs_link(struct dentry *, struct inode *, struct dentry *); |
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int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t, |
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dev_t); |
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int nfs_rename(struct user_namespace *, struct inode *, struct dentry *, |
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struct inode *, struct dentry *, unsigned int); |
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/* file.c */ |
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int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); |
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loff_t nfs_file_llseek(struct file *, loff_t, int); |
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ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); |
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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_free_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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extern void nfs_zap_acl_cache(struct inode *inode); |
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extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags); |
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extern bool nfs_check_cache_invalid(struct inode *, unsigned long); |
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extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); |
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extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); |
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/* super.c */ |
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extern const struct super_operations nfs_sops; |
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bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); |
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int nfs_try_get_tree(struct fs_context *); |
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int nfs_get_tree_common(struct fs_context *); |
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void nfs_kill_super(struct super_block *); |
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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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extern int nfs_client_for_each_server(struct nfs_client *clp, |
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int (*fn)(struct nfs_server *, void *), |
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void *data); |
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/* io.c */ |
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extern void nfs_start_io_read(struct inode *inode); |
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extern void nfs_end_io_read(struct inode *inode); |
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extern void nfs_start_io_write(struct inode *inode); |
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extern void nfs_end_io_write(struct inode *inode); |
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extern void nfs_start_io_direct(struct inode *inode); |
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extern void nfs_end_io_direct(struct inode *inode); |
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static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) |
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{ |
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return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; |
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} |
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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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int nfs_submount(struct fs_context *, struct nfs_server *); |
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int nfs_do_submount(struct fs_context *); |
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/* getroot.c */ |
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extern int nfs_get_root(struct super_block *s, struct fs_context *fc); |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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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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/* super.c */ |
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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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int nfs_reconfigure(struct fs_context *); |
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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 nfs_rpc_ops *nfs_ops, |
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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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u32 ds_commit_idx); |
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int nfs_write_need_commit(struct nfs_pgio_header *); |
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void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); |
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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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u32 ds_commit_idx); |
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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, |
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struct nfs_commit_info *cinfo); |
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void nfs_request_add_commit_list_locked(struct nfs_page *req, |
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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, struct inode *inode); |
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void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); |
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int nfs_filemap_write_and_wait_range(struct address_space *mapping, |
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loff_t lstart, loff_t lend); |
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#ifdef CONFIG_NFS_V4_1 |
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static inline void |
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pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, |
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unsigned int nbuckets) |
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{ |
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unsigned int i; |
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for (i = 0; i < nbuckets; i++) |
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buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; |
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} |
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static inline |
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void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) |
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{ |
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struct pnfs_commit_array *array; |
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|
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rcu_read_lock(); |
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list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) |
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pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, |
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array->nbuckets); |
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rcu_read_unlock(); |
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} |
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#else |
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static inline |
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void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) |
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{ |
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} |
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#endif |
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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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#endif |
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static inline int |
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nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, |
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const struct nfs_write_verifier *v2) |
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{ |
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return memcmp(v1->data, v2->data, sizeof(v1->data)); |
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} |
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static inline bool |
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nfs_write_match_verf(const struct nfs_writeverf *verf, |
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struct nfs_page *req) |
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{ |
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return verf->committed > NFS_UNSTABLE && |
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!nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); |
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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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/* 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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extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); |
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/* nfs4proc.c */ |
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extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
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const struct nfs_client_initdata *); |
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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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const struct 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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const struct cred *cred); |
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extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, |
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struct rpc_xprt *xprt, |
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void *data); |
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static inline struct inode *nfs_igrab_and_active(struct inode *inode) |
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{ |
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struct super_block *sb = inode->i_sb; |
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if (sb && nfs_sb_active(sb)) { |
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if (igrab(inode)) |
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return inode; |
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nfs_sb_deactive(sb); |
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} |
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return NULL; |
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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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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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* 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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* 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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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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return bsize; |
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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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* 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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return nfs_block_bits(bsize, nrbitsp); |
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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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* Record the page as unstable (an extra writeback period) and mark its |
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* inode as dirty. |
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*/ |
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static inline |
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void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) |
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{ |
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if (!cinfo->dreq) { |
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struct inode *inode = page_file_mapping(page)->host; |
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|
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/* This page is really still in write-back - just that the |
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* writeback is happening on the server now. |
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*/ |
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inc_node_page_state(page, NR_WRITEBACK); |
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inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); |
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__mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
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} |
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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 |
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unsigned int nfs_page_length(struct page *page) |
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{ |
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loff_t i_size = i_size_read(page_file_mapping(page)->host); |
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if (i_size > 0) { |
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pgoff_t index = page_index(page); |
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pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; |
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if (index < end_index) |
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return PAGE_SIZE; |
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if (index == end_index) |
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return ((i_size - 1) & ~PAGE_MASK) + 1; |
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} |
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return 0; |
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} |
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/* |
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* Convert a umode to a dirent->d_type |
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*/ |
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static inline |
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unsigned char nfs_umode_to_dtype(umode_t mode) |
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{ |
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return (mode >> 12) & 15; |
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} |
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/* |
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* Determine the number of pages in an array of length 'len' and |
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* with a base offset of 'base' |
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*/ |
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static inline |
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unsigned int nfs_page_array_len(unsigned int base, size_t len) |
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{ |
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return ((unsigned long)len + (unsigned long)base + |
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PAGE_SIZE - 1) >> PAGE_SHIFT; |
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} |
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/* |
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* Convert a struct timespec64 into a 64-bit change attribute |
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* |
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* This does approximately the same thing as timespec64_to_ns(), |
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* but for calculation efficiency, we multiply the seconds by |
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* 1024*1024*1024. |
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*/ |
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static inline |
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u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) |
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{ |
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return ((u64)ts->tv_sec << 30) + ts->tv_nsec; |
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} |
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#ifdef CONFIG_CRC32 |
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/** |
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* nfs_fhandle_hash - calculate the crc32 hash for the filehandle |
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* @fh - pointer to filehandle |
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* |
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* returns a crc32 hash for the filehandle that is compatible with |
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* the one displayed by "wireshark". |
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*/ |
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static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
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{ |
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return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); |
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} |
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static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) |
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{ |
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return ~crc32_le(0xFFFFFFFF, &stateid->other[0], |
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NFS4_STATEID_OTHER_SIZE); |
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} |
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#else |
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static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) |
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{ |
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return 0; |
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} |
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static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) |
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{ |
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return 0; |
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} |
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#endif |
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static inline bool nfs_error_is_fatal(int err) |
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{ |
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switch (err) { |
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case -ERESTARTSYS: |
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case -EINTR: |
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case -EACCES: |
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case -EDQUOT: |
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case -EFBIG: |
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case -EIO: |
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case -ENOSPC: |
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case -EROFS: |
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case -ESTALE: |
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case -E2BIG: |
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case -ENOMEM: |
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case -ETIMEDOUT: |
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return true; |
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default: |
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return false; |
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} |
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} |
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|
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static inline bool nfs_error_is_fatal_on_server(int err) |
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{ |
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switch (err) { |
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case 0: |
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case -ERESTARTSYS: |
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case -EINTR: |
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return false; |
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} |
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return nfs_error_is_fatal(err); |
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} |
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|
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/* |
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* Select between a default port value and a user-specified port value. |
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* If a zero value is set, then autobind will be used. |
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*/ |
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static inline void nfs_set_port(struct sockaddr *sap, int *port, |
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const unsigned short default_port) |
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{ |
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if (*port == NFS_UNSPEC_PORT) |
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*port = default_port; |
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|
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rpc_set_port(sap, *port); |
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}
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