/* * New rpc_call implementation */ int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) { struct rpc_task my_task, *task = &my_task; sigset_t oldset; int status; /* If this client is slain all further I/O fails */ if (clnt->cl_dead) return -EIO; if (flags & RPC_TASK_ASYNC) { printk("rpc_call_sync: Illegal flag combination for synchronous task\n"); flags &= ~RPC_TASK_ASYNC; } rpc_clnt_sigmask(clnt, &oldset); /* Create/initialize a new RPC task */ rpc_init_task(task, clnt, NULL, flags); rpc_call_setup(task, msg, 0); /* Set up the call info struct and execute the task */ if (task->tk_status == 0) status = rpc_execute(task); else { status = task->tk_status; rpc_release_task(task); } rpc_clnt_sigunmask(clnt, &oldset); return status; }
/* * New rpc_call implementation */ int rpc_do_call(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags, rpc_action func, void *data) { struct rpc_task my_task, *task = &my_task; sigset_t oldset; int async, status; /* If this client is slain all further I/O fails */ if (clnt->cl_dead) return -EIO; rpc_clnt_sigmask(clnt, &oldset); /* Create/initialize a new RPC task */ if ((async = (flags & RPC_TASK_ASYNC)) != 0) { if (!func) func = rpc_default_callback; status = -ENOMEM; if (!(task = rpc_new_task(clnt, func, flags))) goto out; task->tk_calldata = data; } else { rpc_init_task(task, clnt, NULL, flags); } /* Bind the user cred, set up the call info struct and * execute the task */ if (rpcauth_lookupcred(task) != NULL) { rpc_call_setup(task, proc, argp, resp, 0); rpc_execute(task); } else async = 0; status = 0; if (!async) { status = task->tk_status; rpc_release_task(task); } out: rpc_clnt_sigunmask(clnt, &oldset); return status; }
/* * New rpc_call implementation */ int rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags, rpc_action callback, void *data) { struct rpc_task *task; sigset_t oldset; int status; /* If this client is slain all further I/O fails */ if (clnt->cl_dead) return -EIO; flags |= RPC_TASK_ASYNC; rpc_clnt_sigmask(clnt, &oldset); /* Create/initialize a new RPC task */ if (!callback) callback = rpc_default_callback; status = -ENOMEM; if (!(task = rpc_new_task(clnt, callback, flags))) goto out; task->tk_calldata = data; rpc_call_setup(task, msg, 0); /* Set up the call info struct and execute the task */ if (task->tk_status == 0) status = rpc_execute(task); else { status = task->tk_status; rpc_release_task(task); } out: rpc_clnt_sigunmask(clnt, &oldset); return status; }
static int nfs3_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_fattr dir_attr; struct nfs3_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct nfs3_diropres res = { .dir_attr = &dir_attr, .fh = fhandle, .fattr = fattr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], .rpc_argp = &arg, .rpc_resp = &res, }; int status; dprintk("NFS call lookup %s\n", name->name); nfs_fattr_init(&dir_attr); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; msg.rpc_argp = fhandle; msg.rpc_resp = fattr; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); } dprintk("NFS reply lookup: %d\n", status); if (status >= 0) status = nfs_refresh_inode(dir, &dir_attr); return status; } static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) { struct nfs_fattr fattr; struct nfs3_accessargs arg = { .fh = NFS_FH(inode), }; struct nfs3_accessres res = { .fattr = &fattr, }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], .rpc_argp = &arg, .rpc_resp = &res, .rpc_cred = entry->cred, }; int mode = entry->mask; int status; dprintk("NFS call access\n"); if (mode & MAY_READ) arg.access |= NFS3_ACCESS_READ; if (S_ISDIR(inode->i_mode)) { if (mode & MAY_WRITE) arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; if (mode & MAY_EXEC) arg.access |= NFS3_ACCESS_LOOKUP; } else { if (mode & MAY_WRITE) arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; if (mode & MAY_EXEC) arg.access |= NFS3_ACCESS_EXECUTE; } nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_refresh_inode(inode, &fattr); if (status == 0) { entry->mask = 0; if (res.access & NFS3_ACCESS_READ) entry->mask |= MAY_READ; if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) entry->mask |= MAY_WRITE; if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) entry->mask |= MAY_EXEC; } dprintk("NFS reply access: %d\n", status); return status; } static int nfs3_proc_readlink(struct inode *inode, struct page *page, unsigned int pgbase, unsigned int pglen) { struct nfs_fattr fattr; struct nfs3_readlinkargs args = { .fh = NFS_FH(inode), .pgbase = pgbase, .pglen = pglen, .pages = &page }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], .rpc_argp = &args, .rpc_resp = &fattr, }; int status; dprintk("NFS call readlink\n"); nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_refresh_inode(inode, &fattr); dprintk("NFS reply readlink: %d\n", status); return status; } static int nfs3_proc_read(struct nfs_read_data *rdata) { int flags = rdata->flags; struct inode * inode = rdata->inode; struct nfs_fattr * fattr = rdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_READ], .rpc_argp = &rdata->args, .rpc_resp = &rdata->res, .rpc_cred = rdata->cred, }; int status; dprintk("NFS call read %d @ %Ld\n", rdata->args.count, (long long) rdata->args.offset); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) nfs_refresh_inode(inode, fattr); dprintk("NFS reply read: %d\n", status); return status; } static int nfs3_proc_write(struct nfs_write_data *wdata) { int rpcflags = wdata->flags; struct inode * inode = wdata->inode; struct nfs_fattr * fattr = wdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], .rpc_argp = &wdata->args, .rpc_resp = &wdata->res, .rpc_cred = wdata->cred, }; int status; dprintk("NFS call write %d @ %Ld\n", wdata->args.count, (long long) wdata->args.offset); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags); if (status >= 0) nfs_post_op_update_inode(inode, fattr); dprintk("NFS reply write: %d\n", status); return status < 0? status : wdata->res.count; } static int nfs3_proc_commit(struct nfs_write_data *cdata) { struct inode * inode = cdata->inode; struct nfs_fattr * fattr = cdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], .rpc_argp = &cdata->args, .rpc_resp = &cdata->res, .rpc_cred = cdata->cred, }; int status; dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, (long long) cdata->args.offset); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); if (status >= 0) nfs_post_op_update_inode(inode, fattr); dprintk("NFS reply commit: %d\n", status); return status; } /* * Create a regular file. * For now, we don't implement O_EXCL. */ static int nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, int flags, struct nameidata *nd) { struct nfs_fh fhandle; struct nfs_fattr fattr; struct nfs_fattr dir_attr; struct nfs3_createargs arg = { .fh = NFS_FH(dir), .name = dentry->d_name.name, .len = dentry->d_name.len, .sattr = sattr, }; struct nfs3_diropres res = { .dir_attr = &dir_attr, .fh = &fhandle, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_CREATE], .rpc_argp = &arg, .rpc_resp = &res, }; mode_t mode = sattr->ia_mode; int status; dprintk("NFS call create %s\n", dentry->d_name.name); arg.createmode = NFS3_CREATE_UNCHECKED; if (flags & O_EXCL) { arg.createmode = NFS3_CREATE_EXCLUSIVE; arg.verifier[0] = jiffies; arg.verifier[1] = current->pid; } sattr->ia_mode &= ~current->fs->umask; again: nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_refresh_inode(dir, &dir_attr); /* If the server doesn't support the exclusive creation semantics, * try again with simple 'guarded' mode. */ if (status == NFSERR_NOTSUPP) { switch (arg.createmode) { case NFS3_CREATE_EXCLUSIVE: arg.createmode = NFS3_CREATE_GUARDED; break; case NFS3_CREATE_GUARDED: arg.createmode = NFS3_CREATE_UNCHECKED; break; case NFS3_CREATE_UNCHECKED: goto out; } goto again; } if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); if (status != 0) goto out; /* When we created the file with exclusive semantics, make * sure we set the attributes afterwards. */ if (arg.createmode == NFS3_CREATE_EXCLUSIVE) { dprintk("NFS call setattr (post-create)\n"); if (!(sattr->ia_valid & ATTR_ATIME_SET)) sattr->ia_valid |= ATTR_ATIME; if (!(sattr->ia_valid & ATTR_MTIME_SET)) sattr->ia_valid |= ATTR_MTIME; /* Note: we could use a guarded setattr here, but I'm * not sure this buys us anything (and I'd have * to revamp the NFSv3 XDR code) */ status = nfs3_proc_setattr(dentry, &fattr, sattr); if (status == 0) nfs_setattr_update_inode(dentry->d_inode, sattr); nfs_refresh_inode(dentry->d_inode, &fattr); dprintk("NFS reply setattr (post-create): %d\n", status); } if (status != 0) goto out; status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); out: dprintk("NFS reply create: %d\n", status); return status; } static int nfs3_proc_remove(struct inode *dir, struct qstr *name) { struct nfs_fattr dir_attr; struct nfs3_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], .rpc_argp = &arg, .rpc_resp = &dir_attr, }; int status; dprintk("NFS call remove %s\n", name->name); nfs_fattr_init(&dir_attr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply remove: %d\n", status); return status; } static int nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) { struct unlinkxdr { struct nfs3_diropargs arg; struct nfs_fattr res; } *ptr; ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL); if (!ptr) return -ENOMEM; ptr->arg.fh = NFS_FH(dir->d_inode); ptr->arg.name = name->name; ptr->arg.len = name->len; nfs_fattr_init(&ptr->res); msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; msg->rpc_argp = &ptr->arg; msg->rpc_resp = &ptr->res; return 0; } static int nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task) { struct rpc_message *msg = &task->tk_msg; struct nfs_fattr *dir_attr; if (nfs3_async_handle_jukebox(task, dir->d_inode)) return 1; if (msg->rpc_argp) { dir_attr = (struct nfs_fattr*)msg->rpc_resp; nfs_post_op_update_inode(dir->d_inode, dir_attr); kfree(msg->rpc_argp); } return 0; } static int nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, struct inode *new_dir, struct qstr *new_name) { struct nfs_fattr old_dir_attr, new_dir_attr; struct nfs3_renameargs arg = { .fromfh = NFS_FH(old_dir), .fromname = old_name->name, .fromlen = old_name->len, .tofh = NFS_FH(new_dir), .toname = new_name->name, .tolen = new_name->len }; struct nfs3_renameres res = { .fromattr = &old_dir_attr, .toattr = &new_dir_attr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], .rpc_argp = &arg, .rpc_resp = &res, }; int status; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); nfs_fattr_init(&old_dir_attr); nfs_fattr_init(&new_dir_attr); status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); nfs_post_op_update_inode(old_dir, &old_dir_attr); nfs_post_op_update_inode(new_dir, &new_dir_attr); dprintk("NFS reply rename: %d\n", status); return status; } static int nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs_fattr dir_attr, fattr; struct nfs3_linkargs arg = { .fromfh = NFS_FH(inode), .tofh = NFS_FH(dir), .toname = name->name, .tolen = name->len }; struct nfs3_linkres res = { .dir_attr = &dir_attr, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], .rpc_argp = &arg, .rpc_resp = &res, }; int status; dprintk("NFS call link %s\n", name->name); nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); nfs_post_op_update_inode(inode, &fattr); dprintk("NFS reply link: %d\n", status); return status; } static int nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_fattr dir_attr; struct nfs3_symlinkargs arg = { .fromfh = NFS_FH(dir), .fromname = name->name, .fromlen = name->len, .topath = path->name, .tolen = path->len, .sattr = sattr }; struct nfs3_diropres res = { .dir_attr = &dir_attr, .fh = fhandle, .fattr = fattr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK], .rpc_argp = &arg, .rpc_resp = &res, }; int status; if (path->len > NFS3_MAXPATHLEN) return -ENAMETOOLONG; dprintk("NFS call symlink %s -> %s\n", name->name, path->name); nfs_fattr_init(&dir_attr); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply symlink: %d\n", status); return status; } static int nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) { struct nfs_fh fhandle; struct nfs_fattr fattr, dir_attr; struct nfs3_mkdirargs arg = { .fh = NFS_FH(dir), .name = dentry->d_name.name, .len = dentry->d_name.len, .sattr = sattr }; struct nfs3_diropres res = { .dir_attr = &dir_attr, .fh = &fhandle, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR], .rpc_argp = &arg, .rpc_resp = &res, }; int mode = sattr->ia_mode; int status; dprintk("NFS call mkdir %s\n", dentry->d_name.name); sattr->ia_mode &= ~current->fs->umask; nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); if (status != 0) goto out; status = nfs_instantiate(dentry, &fhandle, &fattr); if (status != 0) goto out; status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); out: dprintk("NFS reply mkdir: %d\n", status); return status; } static int nfs3_proc_rmdir(struct inode *dir, struct qstr *name) { struct nfs_fattr dir_attr; struct nfs3_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], .rpc_argp = &arg, .rpc_resp = &dir_attr, }; int status; dprintk("NFS call rmdir %s\n", name->name); nfs_fattr_init(&dir_attr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply rmdir: %d\n", status); return status; } /* * The READDIR implementation is somewhat hackish - we pass the user buffer * to the encode function, which installs it in the receive iovec. * The decode function itself doesn't perform any decoding, it just makes * sure the reply is syntactically correct. * * Also note that this implementation handles both plain readdir and * readdirplus. */ static int nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, u64 cookie, struct page *page, unsigned int count, int plus) { struct inode *dir = dentry->d_inode; struct nfs_fattr dir_attr; u32 *verf = NFS_COOKIEVERF(dir); struct nfs3_readdirargs arg = { .fh = NFS_FH(dir), .cookie = cookie, .verf = {verf[0], verf[1]}, .plus = plus, .count = count, .pages = &page }; struct nfs3_readdirres res = { .dir_attr = &dir_attr, .verf = verf, .plus = plus }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], .rpc_argp = &arg, .rpc_resp = &res, .rpc_cred = cred }; int status; lock_kernel(); if (plus) msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; dprintk("NFS call readdir%s %d\n", plus? "plus" : "", (unsigned int) cookie); nfs_fattr_init(&dir_attr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_refresh_inode(dir, &dir_attr); dprintk("NFS reply readdir: %d\n", status); unlock_kernel(); return status; } static int nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, dev_t rdev) { struct nfs_fh fh; struct nfs_fattr fattr, dir_attr; struct nfs3_mknodargs arg = { .fh = NFS_FH(dir), .name = dentry->d_name.name, .len = dentry->d_name.len, .sattr = sattr, .rdev = rdev }; struct nfs3_diropres res = { .dir_attr = &dir_attr, .fh = &fh, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD], .rpc_argp = &arg, .rpc_resp = &res, }; mode_t mode = sattr->ia_mode; int status; switch (sattr->ia_mode & S_IFMT) { case S_IFBLK: arg.type = NF3BLK; break; case S_IFCHR: arg.type = NF3CHR; break; case S_IFIFO: arg.type = NF3FIFO; break; case S_IFSOCK: arg.type = NF3SOCK; break; default: return -EINVAL; } dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, MAJOR(rdev), MINOR(rdev)); sattr->ia_mode &= ~current->fs->umask; nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); if (status != 0) goto out; status = nfs_instantiate(dentry, &fh, &fattr); if (status != 0) goto out; status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); out: dprintk("NFS reply mknod: %d\n", status); return status; } static int nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *stat) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], .rpc_argp = fhandle, .rpc_resp = stat, }; int status; dprintk("NFS call fsstat\n"); nfs_fattr_init(stat->fattr); status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply statfs: %d\n", status); return status; } static int nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], .rpc_argp = fhandle, .rpc_resp = info, }; int status; dprintk("NFS call fsinfo\n"); nfs_fattr_init(info->fattr); status = rpc_call_sync(server->client_sys, &msg, 0); dprintk("NFS reply fsinfo: %d\n", status); return status; } static int nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_pathconf *info) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], .rpc_argp = fhandle, .rpc_resp = info, }; int status; dprintk("NFS call pathconf\n"); nfs_fattr_init(info->fattr); status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply pathconf: %d\n", status); return status; } static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) { if (nfs3_async_handle_jukebox(task, data->inode)) return -EAGAIN; /* Call back common NFS readpage processing */ if (task->tk_status >= 0) nfs_refresh_inode(data->inode, &data->fattr); return 0; } static void nfs3_proc_read_setup(struct nfs_read_data *data) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_READ], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; rpc_call_setup(&data->task, &msg, 0); } static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data) { if (nfs3_async_handle_jukebox(task, data->inode)) return -EAGAIN; if (task->tk_status >= 0) nfs_post_op_update_inode(data->inode, data->res.fattr); return 0; } static void nfs3_proc_write_setup(struct nfs_write_data *data, int how) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; data->args.stable = NFS_UNSTABLE; if (how & FLUSH_STABLE) { data->args.stable = NFS_FILE_SYNC; if (NFS_I(data->inode)->ncommit) data->args.stable = NFS_DATA_SYNC; } /* Finalize the task. */ rpc_call_setup(&data->task, &msg, 0); } static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) { if (nfs3_async_handle_jukebox(task, data->inode)) return -EAGAIN; if (task->tk_status >= 0) nfs_post_op_update_inode(data->inode, data->res.fattr); return 0; } static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; rpc_call_setup(&data->task, &msg, 0); } static int nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); } struct nfs_rpc_ops nfs_v3_clientops = { .version = 3, /* protocol version */ .dentry_ops = &nfs_dentry_operations, .dir_inode_ops = &nfs3_dir_inode_operations, .file_inode_ops = &nfs3_file_inode_operations, .getroot = nfs3_proc_get_root, .getattr = nfs3_proc_getattr, .setattr = nfs3_proc_setattr, .lookup = nfs3_proc_lookup, .access = nfs3_proc_access, .readlink = nfs3_proc_readlink, .read = nfs3_proc_read, .write = nfs3_proc_write, .commit = nfs3_proc_commit, .create = nfs3_proc_create, .remove = nfs3_proc_remove, .unlink_setup = nfs3_proc_unlink_setup, .unlink_done = nfs3_proc_unlink_done, .rename = nfs3_proc_rename, .link = nfs3_proc_link, .symlink = nfs3_proc_symlink, .mkdir = nfs3_proc_mkdir, .rmdir = nfs3_proc_rmdir, .readdir = nfs3_proc_readdir, .mknod = nfs3_proc_mknod, .statfs = nfs3_proc_statfs, .fsinfo = nfs3_proc_fsinfo, .pathconf = nfs3_proc_pathconf, .decode_dirent = nfs3_decode_dirent, .read_setup = nfs3_proc_read_setup, .read_done = nfs3_read_done, .write_setup = nfs3_proc_write_setup, .write_done = nfs3_write_done, .commit_setup = nfs3_proc_commit_setup, .commit_done = nfs3_commit_done, .file_open = nfs_open, .file_release = nfs_release, .lock = nfs3_proc_lock, .clear_acl_cache = nfs3_forget_cached_acls, };
static int nfs_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct nfs_diropok res = { .fh = fhandle, .fattr = fattr }; int status; dprintk("NFS call lookup %s\n", name->name); fattr->valid = 0; status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0); dprintk("NFS reply lookup: %d\n", status); return status; } static int nfs_proc_readlink(struct inode *inode, struct page *page) { struct nfs_readlinkargs args = { .fh = NFS_FH(inode), .count = PAGE_CACHE_SIZE, .pages = &page }; int status; dprintk("NFS call readlink\n"); status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0); dprintk("NFS reply readlink: %d\n", status); return status; } static int nfs_proc_read(struct nfs_read_data *rdata, struct file *filp) { int flags = rdata->flags; struct inode * inode = rdata->inode; struct nfs_fattr * fattr = rdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READ], .rpc_argp = &rdata->args, .rpc_resp = &rdata->res, }; int status; dprintk("NFS call read %d @ %Ld\n", rdata->args.count, (long long) rdata->args.offset); fattr->valid = 0; msg.rpc_cred = nfs_cred(inode, filp); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) { nfs_refresh_inode(inode, fattr); /* Emulate the eof flag, which isn't normally needed in NFSv2 * as it is guaranteed to always return the file attributes */ if (rdata->args.offset + rdata->args.count >= fattr->size) rdata->res.eof = 1; } dprintk("NFS reply read: %d\n", status); return status; } static int nfs_proc_write(struct nfs_write_data *wdata, struct file *filp) { int flags = wdata->flags; struct inode * inode = wdata->inode; struct nfs_fattr * fattr = wdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_WRITE], .rpc_argp = &wdata->args, .rpc_resp = &wdata->res, }; int status; dprintk("NFS call write %d @ %Ld\n", wdata->args.count, (long long) wdata->args.offset); fattr->valid = 0; msg.rpc_cred = nfs_cred(inode, filp); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) { nfs_refresh_inode(inode, fattr); wdata->res.count = wdata->args.count; wdata->verf.committed = NFS_FILE_SYNC; } dprintk("NFS reply write: %d\n", status); return status < 0? status : wdata->res.count; } static struct inode * nfs_proc_create(struct inode *dir, struct qstr *name, struct iattr *sattr, int flags) { struct nfs_fh fhandle; struct nfs_fattr fattr; struct nfs_createargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len, .sattr = sattr }; struct nfs_diropok res = { .fh = &fhandle, .fattr = &fattr }; int status; fattr.valid = 0; dprintk("NFS call create %s\n", name->name); status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); dprintk("NFS reply create: %d\n", status); if (status == 0) { struct inode *inode; inode = nfs_fhget(dir->i_sb, &fhandle, &fattr); if (inode) return inode; status = -ENOMEM; } return ERR_PTR(status); } /* * In NFSv2, mknod is grafted onto the create call. */ static int nfs_proc_mknod(struct inode *dir, struct qstr *name, struct iattr *sattr, dev_t rdev, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_createargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len, .sattr = sattr }; struct nfs_diropok res = { .fh = fhandle, .fattr = fattr }; int status, mode; dprintk("NFS call mknod %s\n", name->name); mode = sattr->ia_mode; if (S_ISFIFO(mode)) { sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; sattr->ia_valid &= ~ATTR_SIZE; } else if (S_ISCHR(mode) || S_ISBLK(mode)) { sattr->ia_valid |= ATTR_SIZE; sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ } fattr->valid = 0; status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); if (status == -EINVAL && S_ISFIFO(mode)) { sattr->ia_mode = mode; fattr->valid = 0; status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); } dprintk("NFS reply mknod: %d\n", status); return status; } static int nfs_proc_remove(struct inode *dir, struct qstr *name) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], .rpc_argp = &arg, .rpc_resp = NULL, .rpc_cred = NULL }; int status; dprintk("NFS call remove %s\n", name->name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); dprintk("NFS reply remove: %d\n", status); return status; } static int nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) { struct nfs_diropargs *arg; arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL); if (!arg) return -ENOMEM; arg->fh = NFS_FH(dir->d_inode); arg->name = name->name; arg->len = name->len; msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; msg->rpc_argp = arg; return 0; } static int nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task) { struct rpc_message *msg = &task->tk_msg; if (msg->rpc_argp) kfree(msg->rpc_argp); return 0; } static int nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, struct inode *new_dir, struct qstr *new_name) { struct nfs_renameargs arg = { .fromfh = NFS_FH(old_dir), .fromname = old_name->name, .fromlen = old_name->len, .tofh = NFS_FH(new_dir), .toname = new_name->name, .tolen = new_name->len }; int status; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0); dprintk("NFS reply rename: %d\n", status); return status; } static int nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs_linkargs arg = { .fromfh = NFS_FH(inode), .tofh = NFS_FH(dir), .toname = name->name, .tolen = name->len }; int status; dprintk("NFS call link %s\n", name->name); status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0); dprintk("NFS reply link: %d\n", status); return status; } static int nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_symlinkargs arg = { .fromfh = NFS_FH(dir), .fromname = name->name, .fromlen = name->len, .topath = path->name, .tolen = path->len, .sattr = sattr }; int status; dprintk("NFS call symlink %s -> %s\n", name->name, path->name); fattr->valid = 0; status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0); dprintk("NFS reply symlink: %d\n", status); return status; } static int nfs_proc_mkdir(struct inode *dir, struct qstr *name, struct iattr *sattr, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_createargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len, .sattr = sattr }; struct nfs_diropok res = { .fh = fhandle, .fattr = fattr }; int status; dprintk("NFS call mkdir %s\n", name->name); fattr->valid = 0; status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0); dprintk("NFS reply mkdir: %d\n", status); return status; } static int nfs_proc_rmdir(struct inode *dir, struct qstr *name) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; int status; dprintk("NFS call rmdir %s\n", name->name); status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0); dprintk("NFS reply rmdir: %d\n", status); return status; } /* * The READDIR implementation is somewhat hackish - we pass a temporary * buffer to the encode function, which installs it in the receive * the receive iovec. The decode function just parses the reply to make * sure it is syntactically correct; the entries itself are decoded * from nfs_readdir by calling the decode_entry function directly. */ static int nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, u64 cookie, struct page *page, unsigned int count, int plus) { struct inode *dir = dentry->d_inode; struct nfs_readdirargs arg = { .fh = NFS_FH(dir), .cookie = cookie, .count = count, .pages = &page }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READDIR], .rpc_argp = &arg, .rpc_resp = NULL, .rpc_cred = cred }; int status; lock_kernel(); dprintk("NFS call readdir %d\n", (unsigned int)cookie); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); dprintk("NFS reply readdir: %d\n", status); unlock_kernel(); return status; } static int nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *stat) { struct nfs2_fsstat fsinfo; int status; dprintk("NFS call statfs\n"); stat->fattr->valid = 0; status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); dprintk("NFS reply statfs: %d\n", status); if (status) goto out; stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; stat->tfiles = 0; stat->ffiles = 0; stat->afiles = 0; out: return status; } static int nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { struct nfs2_fsstat fsinfo; int status; dprintk("NFS call fsinfo\n"); info->fattr->valid = 0; status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); dprintk("NFS reply fsinfo: %d\n", status); if (status) goto out; info->rtmax = NFS_MAXDATA; info->rtpref = fsinfo.tsize; info->rtmult = fsinfo.bsize; info->wtmax = NFS_MAXDATA; info->wtpref = fsinfo.tsize; info->wtmult = fsinfo.bsize; info->dtpref = fsinfo.tsize; info->maxfilesize = 0x7FFFFFFF; info->lease_time = 0; out: return status; } static int nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_pathconf *info) { info->max_link = 0; info->max_namelen = NFS2_MAXNAMLEN; return 0; } extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); static void nfs_read_done(struct rpc_task *task) { struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata; if (task->tk_status >= 0) { nfs_refresh_inode(data->inode, data->res.fattr); /* Emulate the eof flag, which isn't normally needed in NFSv2 * as it is guaranteed to always return the file attributes */ if (data->args.offset + data->args.count >= data->res.fattr->size) data->res.eof = 1; } nfs_readpage_result(task); } static void nfs_proc_read_setup(struct nfs_read_data *data) { struct rpc_task *task = &data->task; struct inode *inode = data->inode; int flags; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READ], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; /* N.B. Do we need to test? Never called for swapfile inode */ flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); /* Finalize the task. */ rpc_init_task(task, NFS_CLIENT(inode), nfs_read_done, flags); rpc_call_setup(task, &msg, 0); } static void nfs_write_done(struct rpc_task *task) { struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; if (task->tk_status >= 0) nfs_refresh_inode(data->inode, data->res.fattr); nfs_writeback_done(task); } static void nfs_proc_write_setup(struct nfs_write_data *data, int how) { struct rpc_task *task = &data->task; struct inode *inode = data->inode; int flags; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_WRITE], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ data->args.stable = NFS_FILE_SYNC; /* Set the initial flags for the task. */ flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; /* Finalize the task. */ rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags); rpc_call_setup(task, &msg, 0); } static void nfs_proc_commit_setup(struct nfs_write_data *data, int how) { BUG(); } /* * Set up the nfspage struct with the right credentials */ static void nfs_request_init(struct nfs_page *req, struct file *filp) { req->wb_cred = get_rpccred(nfs_cred(req->wb_inode, filp)); } static int nfs_request_compatible(struct nfs_page *req, struct file *filp, struct page *page) { if (req->wb_file != filp) return 0; if (req->wb_page != page) return 0; if (req->wb_cred != nfs_file_cred(filp)) return 0; return 1; } static int nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); } struct nfs_rpc_ops nfs_v2_clientops = { .version = 2, /* protocol version */ .dentry_ops = &nfs_dentry_operations, .dir_inode_ops = &nfs_dir_inode_operations, .getroot = nfs_proc_get_root, .getattr = nfs_proc_getattr, .setattr = nfs_proc_setattr, .lookup = nfs_proc_lookup, .access = NULL, /* access */ .readlink = nfs_proc_readlink, .read = nfs_proc_read, .write = nfs_proc_write, .commit = NULL, /* commit */ .create = nfs_proc_create, .remove = nfs_proc_remove, .unlink_setup = nfs_proc_unlink_setup, .unlink_done = nfs_proc_unlink_done, .rename = nfs_proc_rename, .link = nfs_proc_link, .symlink = nfs_proc_symlink, .mkdir = nfs_proc_mkdir, .rmdir = nfs_proc_rmdir, .readdir = nfs_proc_readdir, .mknod = nfs_proc_mknod, .statfs = nfs_proc_statfs, .fsinfo = nfs_proc_fsinfo, .pathconf = nfs_proc_pathconf, .decode_dirent = nfs_decode_dirent, .read_setup = nfs_proc_read_setup, .write_setup = nfs_proc_write_setup, .commit_setup = nfs_proc_commit_setup, .file_open = nfs_open, .file_release = nfs_release, .request_init = nfs_request_init, .request_compatible = nfs_request_compatible, .lock = nfs_proc_lock, };
/* * Obtain the port for a given RPC service on a given host. This one can * be called for an ongoing RPC request. */ void rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt) { struct rpc_portmap *map = clnt->cl_pmap; struct sockaddr_in *sap = &clnt->cl_xprt->addr; struct rpc_message msg = { .rpc_proc = &pmap_procedures[PMAP_GETPORT], .rpc_argp = map, .rpc_resp = &clnt->cl_port, .rpc_cred = NULL }; struct rpc_clnt *pmap_clnt; struct rpc_task *child; dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n", task->tk_pid, clnt->cl_server, map->pm_prog, map->pm_vers, map->pm_prot); /* Autobind on cloned rpc clients is discouraged */ BUG_ON(clnt->cl_parent != clnt); spin_lock(&pmap_lock); if (map->pm_binding) { rpc_sleep_on(&map->pm_bindwait, task, NULL, NULL); spin_unlock(&pmap_lock); return; } map->pm_binding = 1; spin_unlock(&pmap_lock); pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot, 0); if (IS_ERR(pmap_clnt)) { task->tk_status = PTR_ERR(pmap_clnt); goto bailout; } task->tk_status = 0; /* * Note: rpc_new_child will release client after a failure. */ if (!(child = rpc_new_child(pmap_clnt, task))) goto bailout; /* Setup the call info struct */ rpc_call_setup(child, &msg, 0); /* ... and run the child task */ rpc_run_child(task, child, pmap_getport_done); return; bailout: spin_lock(&pmap_lock); map->pm_binding = 0; rpc_wake_up(&map->pm_bindwait); spin_unlock(&pmap_lock); rpc_exit(task, -EIO); } #ifdef CONFIG_ROOT_NFS int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot) { struct rpc_portmap map = { .pm_prog = prog, .pm_vers = vers, .pm_prot = prot, .pm_port = 0 }; struct rpc_clnt *pmap_clnt; char hostname[32]; int status; dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %d, %d, %d)\n", NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot); sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr)); pmap_clnt = pmap_create(hostname, sin, prot, 0); if (IS_ERR(pmap_clnt)) return PTR_ERR(pmap_clnt); /* Setup the call info struct */ status = rpc_call(pmap_clnt, PMAP_GETPORT, &map, &map.pm_port, 0); if (status >= 0) { if (map.pm_port != 0) return map.pm_port; status = -EACCES; } return status; } #endif static void pmap_getport_done(struct rpc_task *task) { struct rpc_clnt *clnt = task->tk_client; struct rpc_xprt *xprt = task->tk_xprt; struct rpc_portmap *map = clnt->cl_pmap; dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n", task->tk_pid, task->tk_status, clnt->cl_port); xprt->ops->set_port(xprt, 0); if (task->tk_status < 0) { /* Make the calling task exit with an error */ task->tk_action = rpc_exit_task; } else if (clnt->cl_port == 0) { /* Program not registered */ rpc_exit(task, -EACCES); } else { xprt->ops->set_port(xprt, clnt->cl_port); clnt->cl_port = htons(clnt->cl_port); } spin_lock(&pmap_lock); map->pm_binding = 0; rpc_wake_up(&map->pm_bindwait); spin_unlock(&pmap_lock); } /* * Set or unset a port registration with the local portmapper. * port == 0 means unregister, port != 0 means register. */ int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay) { struct sockaddr_in sin; struct rpc_portmap map; struct rpc_clnt *pmap_clnt; int error = 0; dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n", prog, vers, prot, port); sin.sin_family = AF_INET; sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1); if (IS_ERR(pmap_clnt)) { error = PTR_ERR(pmap_clnt); dprintk("RPC: couldn't create pmap client. Error = %d\n", error); return error; } map.pm_prog = prog; map.pm_vers = vers; map.pm_prot = prot; map.pm_port = port; error = rpc_call(pmap_clnt, port? PMAP_SET : PMAP_UNSET, &map, okay, 0); if (error < 0) { printk(KERN_WARNING "RPC: failed to contact portmap (errno %d).\n", error); } dprintk("RPC: registration status %d/%d\n", error, *okay); /* Client deleted automatically because cl_oneshot == 1 */ return error; } static struct rpc_clnt * pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged) { struct rpc_xprt *xprt; struct rpc_clnt *clnt; /* printk("pmap: create xprt\n"); */ xprt = xprt_create_proto(proto, srvaddr, NULL); if (IS_ERR(xprt)) return (struct rpc_clnt *)xprt; xprt->ops->set_port(xprt, RPC_PMAP_PORT); if (!privileged) xprt->resvport = 0; /* printk("pmap: create clnt\n"); */ clnt = rpc_new_client(xprt, hostname, &pmap_program, RPC_PMAP_VERSION, RPC_AUTH_UNIX); if (!IS_ERR(clnt)) { clnt->cl_softrtry = 1; clnt->cl_oneshot = 1; } return clnt; } /* * XDR encode/decode functions for PMAP */ static int xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map) { dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n", map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port); *p++ = htonl(map->pm_prog); *p++ = htonl(map->pm_vers); *p++ = htonl(map->pm_prot); *p++ = htonl(map->pm_port); req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); return 0; } static int xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp) { *portp = (unsigned short) ntohl(*p++); return 0; }
static int nfs_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct nfs_diropok res = { .fh = fhandle, .fattr = fattr }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], .rpc_argp = &arg, .rpc_resp = &res, }; int status; dprintk("NFS call lookup %s\n", name->name); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); dprintk("NFS reply lookup: %d\n", status); return status; } static int nfs_proc_readlink(struct inode *inode, struct page *page, unsigned int pgbase, unsigned int pglen) { struct nfs_readlinkargs args = { .fh = NFS_FH(inode), .pgbase = pgbase, .pglen = pglen, .pages = &page }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READLINK], .rpc_argp = &args, }; int status; dprintk("NFS call readlink\n"); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); dprintk("NFS reply readlink: %d\n", status); return status; } static int nfs_proc_read(struct nfs_read_data *rdata) { int flags = rdata->flags; struct inode * inode = rdata->inode; struct nfs_fattr * fattr = rdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READ], .rpc_argp = &rdata->args, .rpc_resp = &rdata->res, .rpc_cred = rdata->cred, }; int status; dprintk("NFS call read %d @ %Ld\n", rdata->args.count, (long long) rdata->args.offset); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); nfs_invalidate_atime(inode); if (status >= 0) { nfs_refresh_inode(inode, fattr); /* Emulate the eof flag, which isn't normally needed in NFSv2 * as it is guaranteed to always return the file attributes */ if (rdata->args.offset + rdata->args.count >= fattr->size) rdata->res.eof = 1; } dprintk("NFS reply read: %d\n", status); return status; } static int nfs_proc_write(struct nfs_write_data *wdata) { int flags = wdata->flags; struct inode * inode = wdata->inode; struct nfs_fattr * fattr = wdata->res.fattr; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_WRITE], .rpc_argp = &wdata->args, .rpc_resp = &wdata->res, .rpc_cred = wdata->cred, }; int status; dprintk("NFS call write %d @ %Ld\n", wdata->args.count, (long long) wdata->args.offset); nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) { nfs_post_op_update_inode_force_wcc(inode, fattr); wdata->res.count = wdata->args.count; wdata->verf.committed = NFS_FILE_SYNC; } dprintk("NFS reply write: %d\n", status); return status < 0? status : wdata->res.count; } static int nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, int flags, struct nameidata *nd) { struct nfs_fh fhandle; struct nfs_fattr fattr; struct nfs_createargs arg = { .fh = NFS_FH(dir), .name = dentry->d_name.name, .len = dentry->d_name.len, .sattr = sattr }; struct nfs_diropok res = { .fh = &fhandle, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_CREATE], .rpc_argp = &arg, .rpc_resp = &res, }; int status; nfs_fattr_init(&fattr); dprintk("NFS call create %s\n", dentry->d_name.name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); dprintk("NFS reply create: %d\n", status); return status; } /* * In NFSv2, mknod is grafted onto the create call. */ static int nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, dev_t rdev) { struct nfs_fh fhandle; struct nfs_fattr fattr; struct nfs_createargs arg = { .fh = NFS_FH(dir), .name = dentry->d_name.name, .len = dentry->d_name.len, .sattr = sattr }; struct nfs_diropok res = { .fh = &fhandle, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_CREATE], .rpc_argp = &arg, .rpc_resp = &res, }; int status, mode; dprintk("NFS call mknod %s\n", dentry->d_name.name); mode = sattr->ia_mode; if (S_ISFIFO(mode)) { sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; sattr->ia_valid &= ~ATTR_SIZE; } else if (S_ISCHR(mode) || S_ISBLK(mode)) { sattr->ia_valid |= ATTR_SIZE; sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ } nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == -EINVAL && S_ISFIFO(mode)) { sattr->ia_mode = mode; nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); } if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); dprintk("NFS reply mknod: %d\n", status); return status; } static int nfs_proc_remove(struct inode *dir, struct qstr *name) { struct nfs_removeargs arg = { .fh = NFS_FH(dir), .name.len = name->len, .name.name = name->name, }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], .rpc_argp = &arg, }; int status; dprintk("NFS call remove %s\n", name->name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); dprintk("NFS reply remove: %d\n", status); return status; } static void nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) { msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; } static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) { nfs_mark_for_revalidate(dir); return 1; } static void nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir) { msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; } static int nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, struct inode *new_dir) { nfs_mark_for_revalidate(old_dir); nfs_mark_for_revalidate(new_dir); return 1; } static int nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, struct inode *new_dir, struct qstr *new_name) { struct nfs_renameargs arg = { .old_dir = NFS_FH(old_dir), .old_name = old_name, .new_dir = NFS_FH(new_dir), .new_name = new_name, }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_RENAME], .rpc_argp = &arg, }; int status; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); nfs_mark_for_revalidate(old_dir); nfs_mark_for_revalidate(new_dir); dprintk("NFS reply rename: %d\n", status); return status; } static int nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs_linkargs arg = { .fromfh = NFS_FH(inode), .tofh = NFS_FH(dir), .toname = name->name, .tolen = name->len }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_LINK], .rpc_argp = &arg, }; int status; dprintk("NFS call link %s\n", name->name); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_mark_for_revalidate(inode); nfs_mark_for_revalidate(dir); dprintk("NFS reply link: %d\n", status); return status; } static int nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, unsigned int len, struct iattr *sattr) { struct nfs_fh fhandle; struct nfs_fattr fattr; struct nfs_symlinkargs arg = { .fromfh = NFS_FH(dir), .fromname = dentry->d_name.name, .fromlen = dentry->d_name.len, .pages = &page, .pathlen = len, .sattr = sattr }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], .rpc_argp = &arg, }; int status; if (len > NFS2_MAXPATHLEN) return -ENAMETOOLONG; dprintk("NFS call symlink %s\n", dentry->d_name.name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); /* * V2 SYMLINK requests don't return any attributes. Setting the * filehandle size to zero indicates to nfs_instantiate that it * should fill in the data with a LOOKUP call on the wire. */ if (status == 0) { nfs_fattr_init(&fattr); fhandle.size = 0; status = nfs_instantiate(dentry, &fhandle, &fattr); } dprintk("NFS reply symlink: %d\n", status); return status; } static int nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) { struct nfs_fh fhandle; struct nfs_fattr fattr; struct nfs_createargs arg = { .fh = NFS_FH(dir), .name = dentry->d_name.name, .len = dentry->d_name.len, .sattr = sattr }; struct nfs_diropok res = { .fh = &fhandle, .fattr = &fattr }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], .rpc_argp = &arg, .rpc_resp = &res, }; int status; dprintk("NFS call mkdir %s\n", dentry->d_name.name); nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); dprintk("NFS reply mkdir: %d\n", status); return status; } static int nfs_proc_rmdir(struct inode *dir, struct qstr *name) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), .name = name->name, .len = name->len }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], .rpc_argp = &arg, }; int status; dprintk("NFS call rmdir %s\n", name->name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); dprintk("NFS reply rmdir: %d\n", status); return status; } /* * The READDIR implementation is somewhat hackish - we pass a temporary * buffer to the encode function, which installs it in the receive * the receive iovec. The decode function just parses the reply to make * sure it is syntactically correct; the entries itself are decoded * from nfs_readdir by calling the decode_entry function directly. */ static int nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, u64 cookie, struct page *page, unsigned int count, int plus) { struct inode *dir = dentry->d_inode; struct nfs_readdirargs arg = { .fh = NFS_FH(dir), .cookie = cookie, .count = count, .pages = &page, }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READDIR], .rpc_argp = &arg, .rpc_cred = cred, }; int status; lock_kernel(); dprintk("NFS call readdir %d\n", (unsigned int)cookie); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_invalidate_atime(dir); dprintk("NFS reply readdir: %d\n", status); unlock_kernel(); return status; } static int nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *stat) { struct nfs2_fsstat fsinfo; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_STATFS], .rpc_argp = fhandle, .rpc_resp = &fsinfo, }; int status; dprintk("NFS call statfs\n"); nfs_fattr_init(stat->fattr); status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply statfs: %d\n", status); if (status) goto out; stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; stat->tfiles = 0; stat->ffiles = 0; stat->afiles = 0; out: return status; } static int nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { struct nfs2_fsstat fsinfo; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_STATFS], .rpc_argp = fhandle, .rpc_resp = &fsinfo, }; int status; dprintk("NFS call fsinfo\n"); nfs_fattr_init(info->fattr); status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply fsinfo: %d\n", status); if (status) goto out; info->rtmax = NFS_MAXDATA; info->rtpref = fsinfo.tsize; info->rtmult = fsinfo.bsize; info->wtmax = NFS_MAXDATA; info->wtpref = fsinfo.tsize; info->wtmult = fsinfo.bsize; info->dtpref = fsinfo.tsize; info->maxfilesize = 0x7FFFFFFF; info->lease_time = 0; out: return status; } static int nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_pathconf *info) { info->max_link = 0; info->max_namelen = NFS2_MAXNAMLEN; return 0; } static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) { nfs_invalidate_atime(data->inode); if (task->tk_status >= 0) { nfs_refresh_inode(data->inode, data->res.fattr); /* Emulate the eof flag, which isn't normally needed in NFSv2 * as it is guaranteed to always return the file attributes */ if (data->args.offset + data->args.count >= data->res.fattr->size) data->res.eof = 1; } return 0; } static void nfs_proc_read_setup(struct nfs_read_data *data) { struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READ], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; rpc_call_setup(&data->task, &msg, 0); } static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) { if (task->tk_status >= 0) nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); return 0; } static void nfs_proc_write_setup(struct nfs_write_data *data, int how) { struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_WRITE], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ data->args.stable = NFS_FILE_SYNC; /* Finalize the task. */ rpc_call_setup(&data->task, &msg, 0); } static void nfs_proc_commit_setup(struct nfs_write_data *data, int how) { BUG(); } static int nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); } const struct nfs_rpc_ops nfs_v2_clientops = { .version = 2, /* protocol version */ .dentry_ops = &nfs_dentry_operations, .dir_inode_ops = &nfs_dir_inode_operations, .file_inode_ops = &nfs_file_inode_operations, .getroot = nfs_proc_get_root, .getattr = nfs_proc_getattr, .setattr = nfs_proc_setattr, .lookup = nfs_proc_lookup, .access = NULL, /* access */ .readlink = nfs_proc_readlink, .read = nfs_proc_read, .write = nfs_proc_write, .commit = NULL, /* commit */ .create = nfs_proc_create, .remove = nfs_proc_remove, .unlink_setup = nfs_proc_unlink_setup, .unlink_done = nfs_proc_unlink_done, .rename = nfs_proc_rename, .rename_setup = nfs_proc_rename_setup, .rename_done = nfs_proc_rename_done, .link = nfs_proc_link, .symlink = nfs_proc_symlink, .mkdir = nfs_proc_mkdir, .rmdir = nfs_proc_rmdir, .readdir = nfs_proc_readdir, .mknod = nfs_proc_mknod, .statfs = nfs_proc_statfs, .fsinfo = nfs_proc_fsinfo, .pathconf = nfs_proc_pathconf, .decode_dirent = nfs_decode_dirent, .read_setup = nfs_proc_read_setup, .read_done = nfs_read_done, .write_setup = nfs_proc_write_setup, .write_done = nfs_write_done, .commit_setup = nfs_proc_commit_setup, .file_open = nfs_open, .file_release = nfs_release, .lock = nfs_proc_lock, .close_context = nfs_close_context, };