static int nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = file_inode(filp); return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); }
static int nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_path.dentry->d_inode; return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); }
/* * Lock a (portion of) a file */ int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode * inode = filp->f_dentry->d_inode; int status = 0; dprintk("NFS: nfs_lock(f=%4x/%ld, t=%x, fl=%x, r=%ld:%ld)\n", inode->i_dev, inode->i_ino, fl->fl_type, fl->fl_flags, fl->fl_start, fl->fl_end); if (!inode) return -EINVAL; /* No mandatory locks over NFS */ if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID) return -ENOLCK; /* Fake OK code if mounted without NLM support */ if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM) { if (cmd == F_GETLK) status = LOCK_USE_CLNT; goto out_ok; } /* * No BSD flocks over NFS allowed. * Note: we could try to fake a POSIX lock request here by * using ((u32) filp | 0x80000000) or some such as the pid. * Not sure whether that would be unique, though, or whether * that would break in other places. */ if (!fl->fl_owner || (fl->fl_flags & (FL_POSIX|FL_BROKEN)) != FL_POSIX) return -ENOLCK; /* * Flush all pending writes before doing anything * with locks.. */ status = nfs_wb_all(inode); if (status < 0) return status; if ((status = nlmclnt_proc(inode, cmd, fl)) < 0) return status; else status = 0; /* * Make sure we re-validate anything we've got cached. * This makes locking act as a cache coherency point. */ out_ok: NFS_CACHEINV(inode); return status; }
static int nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = file_inode(filp); struct nfs_lock_context *l_ctx = NULL; struct nfs_open_context *ctx = nfs_file_open_context(filp); int status; if (fl->fl_flags & FL_CLOSE) { l_ctx = nfs_get_lock_context(ctx); if (IS_ERR(l_ctx)) l_ctx = NULL; else set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); } status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx); if (l_ctx) nfs_put_lock_context(l_ctx); 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_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) { if (nfs_async_handle_expired_key(task)) return 0; 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) { if (nfs_async_handle_expired_key(task)) return 0; 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 *fh; 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 = -ENAMETOOLONG; dprintk("NFS call symlink %s\n", dentry->d_name.name); if (len > NFS2_MAXPATHLEN) goto out; fh = nfs_alloc_fhandle(); fattr = nfs_alloc_fattr(); status = -ENOMEM; if (fh == NULL || fattr == NULL) goto out_free; 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) status = nfs_instantiate(dentry, fh, fattr); out_free: nfs_free_fattr(fattr); nfs_free_fhandle(fh); out: 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_createdata *data; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], }; int status = -ENOMEM; dprintk("NFS call mkdir %s\n", dentry->d_name.name); data = nfs_alloc_createdata(dir, dentry, sattr); if (data == NULL) goto out; msg.rpc_argp = &data->arg; msg.rpc_resp = &data->res; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == 0) status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); nfs_free_createdata(data); out: 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 **pages, unsigned int count, int plus) { struct inode *dir = dentry->d_inode; struct nfs_readdirargs arg = { .fh = NFS_FH(dir), .cookie = cookie, .count = count, .pages = pages, }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READDIR], .rpc_argp = &arg, .rpc_cred = cred, }; int status; 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); 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) { if (nfs_async_handle_expired_key(task)) return -EAGAIN; 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) { msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; } static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) { if (nfs_async_handle_expired_key(task)) return -EAGAIN; 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, struct rpc_message *msg) { /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ data->args.stable = NFS_FILE_SYNC; msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; } static void nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) { BUG(); } static int nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_path.dentry->d_inode; return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); } /* Helper functions for NFS lock bounds checking */ #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) static int nfs_lock_check_bounds(const struct file_lock *fl) { __s32 start, end; start = (__s32)fl->fl_start; if ((loff_t)start != fl->fl_start) goto out_einval; if (fl->fl_end != OFFSET_MAX) { end = (__s32)fl->fl_end; if ((loff_t)end != fl->fl_end) goto out_einval; } else end = NFS_LOCK32_OFFSET_MAX; if (start < 0 || start > end) goto out_einval; return 0; out_einval: return -EINVAL; } 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, .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 = nfs2_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, .lock = nfs_proc_lock, .lock_check_bounds = nfs_lock_check_bounds, .close_context = nfs_close_context, .init_client = nfs_init_client, };
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, };
static int nfs3_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 nfs_removeres res; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], .rpc_argp = &arg, .rpc_resp = &res, }; int status = -ENOMEM; dprintk("NFS call remove %s\n", name->name); res.dir_attr = nfs_alloc_fattr(); if (res.dir_attr == NULL) goto out; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, res.dir_attr); nfs_free_fattr(res.dir_attr); out: dprintk("NFS reply remove: %d\n", status); return status; } static void nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; } static int nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) { struct nfs_removeres *res; if (nfs3_async_handle_jukebox(task, dir)) return 0; res = task->tk_msg.rpc_resp; nfs_post_op_update_inode(dir, res->dir_attr); return 1; } static void nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; } static int nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, struct inode *new_dir) { struct nfs_renameres *res; if (nfs3_async_handle_jukebox(task, old_dir)) return 0; res = task->tk_msg.rpc_resp; nfs_post_op_update_inode(old_dir, res->old_fattr); nfs_post_op_update_inode(new_dir, res->new_fattr); return 1; } static int nfs3_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 nfs_renameres res; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], .rpc_argp = &arg, .rpc_resp = &res, }; int status = -ENOMEM; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); res.old_fattr = nfs_alloc_fattr(); res.new_fattr = nfs_alloc_fattr(); if (res.old_fattr == NULL || res.new_fattr == NULL) goto out; status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); nfs_post_op_update_inode(old_dir, res.old_fattr); nfs_post_op_update_inode(new_dir, res.new_fattr); out: nfs_free_fattr(res.old_fattr); nfs_free_fattr(res.new_fattr); dprintk("NFS reply rename: %d\n", status); return status; } static int nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs3_linkargs arg = { .fromfh = NFS_FH(inode), .tofh = NFS_FH(dir), .toname = name->name, .tolen = name->len }; struct nfs3_linkres res; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], .rpc_argp = &arg, .rpc_resp = &res, }; int status = -ENOMEM; dprintk("NFS call link %s\n", name->name); res.fattr = nfs_alloc_fattr(); res.dir_attr = nfs_alloc_fattr(); if (res.fattr == NULL || res.dir_attr == NULL) goto out; status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_post_op_update_inode(dir, res.dir_attr); nfs_post_op_update_inode(inode, res.fattr); out: nfs_free_fattr(res.dir_attr); nfs_free_fattr(res.fattr); dprintk("NFS reply link: %d\n", status); return status; } static int nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, unsigned int len, struct iattr *sattr) { struct nfs3_createdata *data; int status = -ENOMEM; if (len > NFS3_MAXPATHLEN) return -ENAMETOOLONG; dprintk("NFS call symlink %s\n", dentry->d_name.name); data = nfs3_alloc_createdata(); if (data == NULL) goto out; data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; data->arg.symlink.fromfh = NFS_FH(dir); data->arg.symlink.fromname = dentry->d_name.name; data->arg.symlink.fromlen = dentry->d_name.len; data->arg.symlink.pages = &page; data->arg.symlink.pathlen = len; data->arg.symlink.sattr = sattr; status = nfs3_do_create(dir, dentry, data); nfs3_free_createdata(data); out: dprintk("NFS reply symlink: %d\n", status); return status; } static int nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) { struct nfs3_createdata *data; int mode = sattr->ia_mode; int status = -ENOMEM; dprintk("NFS call mkdir %s\n", dentry->d_name.name); sattr->ia_mode &= ~current_umask(); data = nfs3_alloc_createdata(); if (data == NULL) goto out; data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; data->arg.mkdir.fh = NFS_FH(dir); data->arg.mkdir.name = dentry->d_name.name; data->arg.mkdir.len = dentry->d_name.len; data->arg.mkdir.sattr = sattr; status = nfs3_do_create(dir, dentry, data); if (status != 0) goto out; status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); out: nfs3_free_createdata(data); 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, }; int status = -ENOMEM; dprintk("NFS call rmdir %s\n", name->name); dir_attr = nfs_alloc_fattr(); if (dir_attr == NULL) goto out; msg.rpc_resp = dir_attr; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, dir_attr); nfs_free_fattr(dir_attr); out: 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 **pages, unsigned int count, int plus) { struct inode *dir = dentry->d_inode; __be32 *verf = NFS_COOKIEVERF(dir); struct nfs3_readdirargs arg = { .fh = NFS_FH(dir), .cookie = cookie, .verf = {verf[0], verf[1]}, .plus = plus, .count = count, .pages = pages }; struct nfs3_readdirres res = { .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 = -ENOMEM; if (plus) msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; dprintk("NFS call readdir%s %d\n", plus? "plus" : "", (unsigned int) cookie); res.dir_attr = nfs_alloc_fattr(); if (res.dir_attr == NULL) goto out; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_invalidate_atime(dir); nfs_refresh_inode(dir, res.dir_attr); nfs_free_fattr(res.dir_attr); out: dprintk("NFS reply readdir%s: %d\n", plus? "plus" : "", status); return status; } static int nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, dev_t rdev) { struct nfs3_createdata *data; mode_t mode = sattr->ia_mode; int status = -ENOMEM; dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, MAJOR(rdev), MINOR(rdev)); sattr->ia_mode &= ~current_umask(); data = nfs3_alloc_createdata(); if (data == NULL) goto out; data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; data->arg.mknod.fh = NFS_FH(dir); data->arg.mknod.name = dentry->d_name.name; data->arg.mknod.len = dentry->d_name.len; data->arg.mknod.sattr = sattr; data->arg.mknod.rdev = rdev; switch (sattr->ia_mode & S_IFMT) { case S_IFBLK: data->arg.mknod.type = NF3BLK; break; case S_IFCHR: data->arg.mknod.type = NF3CHR; break; case S_IFIFO: data->arg.mknod.type = NF3FIFO; break; case S_IFSOCK: data->arg.mknod.type = NF3SOCK; break; default: status = -EINVAL; goto out; } status = nfs3_do_create(dir, dentry, data); if (status != 0) goto out; status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); out: nfs3_free_createdata(data); 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 fsstat: %d\n", status); return status; } static int do_proc_fsinfo(struct rpc_clnt *client, 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(client, &msg, 0); dprintk("NFS reply fsinfo: %d\n", status); return status; } /* * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via * nfs_create_server */ static int nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { int status; status = do_proc_fsinfo(server->client, fhandle, info); if (status && server->nfs_client->cl_rpcclient != server->client) status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); 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; nfs_invalidate_atime(data->inode); nfs_refresh_inode(data->inode, &data->fattr); return 0; } static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; } 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_force_wcc(data->inode, data->res.fattr); return 0; } static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; } static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) { if (nfs3_async_handle_jukebox(task, data->inode)) return -EAGAIN; nfs_refresh_inode(data->inode, data->res.fattr); return 0; } static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; } static int nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_path.dentry->d_inode; return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); } const 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, .file_ops = &nfs_file_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, .create = nfs3_proc_create, .remove = nfs3_proc_remove, .unlink_setup = nfs3_proc_unlink_setup, .unlink_done = nfs3_proc_unlink_done, .rename = nfs3_proc_rename, .rename_setup = nfs3_proc_rename_setup, .rename_done = nfs3_proc_rename_done, .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, .lock = nfs3_proc_lock, .clear_acl_cache = nfs3_forget_cached_acls, .close_context = nfs_close_context, .init_client = nfs_init_client, };
/* * Lock a (portion of) a file */ int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode * inode = filp->f_dentry->d_inode; int status = 0; int status2; dprintk("NFS: nfs_lock(f=%4x/%ld, t=%x, fl=%x, r=%Ld:%Ld)\n", inode->i_dev, inode->i_ino, fl->fl_type, fl->fl_flags, (long long)fl->fl_start, (long long)fl->fl_end); if (!inode) return -EINVAL; /* No mandatory locks over NFS */ if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID) return -ENOLCK; /* Fake OK code if mounted without NLM support */ if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM) { if (IS_GETLK(cmd)) status = LOCK_USE_CLNT; goto out_ok; } /* * No BSD flocks over NFS allowed. * Note: we could try to fake a POSIX lock request here by * using ((u32) filp | 0x80000000) or some such as the pid. * Not sure whether that would be unique, though, or whether * that would break in other places. */ if (!fl->fl_owner || (fl->fl_flags & (FL_POSIX|FL_BROKEN)) != FL_POSIX) return -ENOLCK; /* * Flush all pending writes before doing anything * with locks.. */ status = filemap_fdatasync(inode->i_mapping); down(&inode->i_sem); status2 = nfs_wb_all(inode); if (status2 && !status) status = status2; up(&inode->i_sem); status2 = filemap_fdatawait(inode->i_mapping); if (status2 && !status) status = status2; if (status < 0) return status; lock_kernel(); status = nlmclnt_proc(inode, cmd, fl); unlock_kernel(); if (status < 0) return status; status = 0; /* * Make sure we clear the cache whenever we try to get the lock. * This makes locking act as a cache coherency point. */ out_ok: if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { filemap_fdatasync(inode->i_mapping); down(&inode->i_sem); nfs_wb_all(inode); /* we may have slept */ up(&inode->i_sem); filemap_fdatawait(inode->i_mapping); nfs_zap_caches(inode); } return status; }
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, };