/* The file offset position is now represented as a true offset into the * page cache as is the case in most of the other filesystems. */ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) { struct dentry *dentry = filp->f_dentry; struct inode *inode = dentry->d_inode; nfs_readdir_descriptor_t my_desc, *desc = &my_desc; struct nfs_entry my_entry; struct nfs_fh fh; struct nfs_fattr fattr; long res; lock_kernel(); res = nfs_revalidate_inode(NFS_SERVER(inode), inode); if (res < 0) { unlock_kernel(); return res; } /* * filp->f_pos points to the file offset in the page cache. * but if the cache has meanwhile been zapped, we need to * read from the last dirent to revalidate f_pos * itself. */ memset(desc, 0, sizeof(*desc)); desc->file = filp; desc->target = filp->f_pos; desc->decode = NFS_PROTO(inode)->decode_dirent; desc->plus = NFS_USE_READDIRPLUS(inode); my_entry.cookie = my_entry.prev_cookie = 0; my_entry.eof = 0; my_entry.fh = &fh; my_entry.fattr = &fattr; desc->entry = &my_entry; while(!desc->entry->eof) { res = readdir_search_pagecache(desc); if (res == -EBADCOOKIE) { /* This means either end of directory */ if (desc->entry->cookie != desc->target) { /* Or that the server has 'lost' a cookie */ res = uncached_readdir(desc, dirent, filldir); if (res >= 0) continue; } res = 0; break; } if (res == -ETOOSMALL && desc->plus) { NFS_FLAGS(inode) &= ~NFS_INO_ADVISE_RDPLUS; nfs_zap_caches(inode); desc->plus = 0; desc->entry->eof = 0; continue; } if (res < 0) break; res = nfs_do_filldir(desc, dirent, filldir); if (res < 0) { res = 0; break; } } unlock_kernel(); if (desc->error < 0) return desc->error; if (res < 0) return res; return 0; }
/* * This is called every time the dcache has a lookup hit, * and we should check whether we can really trust that * lookup. * * NOTE! The hit can be a negative hit too, don't assume * we have an inode! * * If the parent directory is seen to have changed, we throw out the * cached dentry and do a new lookup. */ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) { struct inode *dir; struct inode *inode; struct dentry *parent; int error; struct nfs_fh fhandle; struct nfs_fattr fattr; unsigned long verifier; int isopen = 0; parent = dget_parent(dentry); lock_kernel(); dir = parent->d_inode; inode = dentry->d_inode; if (nd && !(nd->flags & LOOKUP_CONTINUE) && (nd->flags & LOOKUP_OPEN)) isopen = 1; if (!inode) { if (nfs_neg_need_reval(dir, dentry, nd)) goto out_bad; goto out_valid; } if (is_bad_inode(inode)) { dfprintk(VFS, "nfs_lookup_validate: %s/%s has dud inode\n", dentry->d_parent->d_name.name, dentry->d_name.name); goto out_bad; } /* Revalidate parent directory attribute cache */ nfs_revalidate_inode(NFS_SERVER(dir), dir); /* Force a full look up iff the parent directory has changed */ if (nfs_check_verifier(dir, dentry)) { if (nfs_lookup_verify_inode(inode, isopen)) goto out_zap_parent; goto out_valid; } /* * Note: we're not holding inode->i_sem and so may be racing with * operations that change the directory. We therefore save the * change attribute *before* we do the RPC call. */ verifier = nfs_save_change_attribute(dir); error = nfs_cached_lookup(dir, dentry, &fhandle, &fattr); if (!error) { if (memcmp(NFS_FH(inode), &fhandle, sizeof(struct nfs_fh))!= 0) goto out_bad; if (nfs_lookup_verify_inode(inode, isopen)) goto out_zap_parent; goto out_valid_renew; } if (NFS_STALE(inode)) goto out_bad; error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr); if (error) goto out_bad; if (memcmp(NFS_FH(inode), &fhandle, sizeof(struct nfs_fh))!= 0) goto out_bad; if ((error = nfs_refresh_inode(inode, &fattr)) != 0) goto out_bad; out_valid_renew: nfs_renew_times(dentry); nfs_set_verifier(dentry, verifier); out_valid: unlock_kernel(); dput(parent); return 1; out_zap_parent: nfs_zap_caches(dir); out_bad: NFS_CACHEINV(dir); if (inode && S_ISDIR(inode->i_mode)) { /* Purge readdir caches. */ nfs_zap_caches(inode); /* If we have submounts, don't unhash ! */ if (have_submounts(dentry)) goto out_valid; shrink_dcache_parent(dentry); } d_drop(dentry); unlock_kernel(); dput(parent); return 0; }
/* * Set up the argument/result storage required for the RPC call. */ static int nfs_write_rpcsetup(struct nfs_page *req, struct nfs_write_data *data, const struct rpc_call_ops *call_ops, unsigned int count, unsigned int offset, int how) { struct inode *inode = req->wb_context->path.dentry->d_inode; int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; int priority = flush_task_priority(how); struct rpc_task *task; struct rpc_message msg = { .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = req->wb_context->cred, }; struct rpc_task_setup task_setup_data = { .rpc_client = NFS_CLIENT(inode), .task = &data->task, .rpc_message = &msg, .callback_ops = call_ops, .callback_data = data, .workqueue = nfsiod_workqueue, .flags = flags, .priority = priority, }; /* Set up the RPC argument and reply structs * NB: take care not to mess about with data->commit et al. */ data->req = req; data->inode = inode = req->wb_context->path.dentry->d_inode; data->cred = msg.rpc_cred; data->args.fh = NFS_FH(inode); data->args.offset = req_offset(req) + offset; data->args.pgbase = req->wb_pgbase + offset; data->args.pages = data->pagevec; data->args.count = count; data->args.context = get_nfs_open_context(req->wb_context); data->args.stable = NFS_UNSTABLE; if (how & FLUSH_STABLE) { data->args.stable = NFS_DATA_SYNC; if (!nfs_need_commit(NFS_I(inode))) data->args.stable = NFS_FILE_SYNC; } data->res.fattr = &data->fattr; data->res.count = count; data->res.verf = &data->verf; nfs_fattr_init(&data->fattr); /* Set up the initial task struct. */ NFS_PROTO(inode)->write_setup(data, &msg); dprintk("NFS: %5u initiated write call " "(req %s/%lld, %u bytes @ offset %llu)\n", data->task.tk_pid, inode->i_sb->s_id, (long long)NFS_FILEID(inode), count, (unsigned long long)data->args.offset); task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); rpc_put_task(task); return 0; } /* If a nfs_flush_* function fails, it should remove reqs from @head and * call this on each, which will prepare them to be retried on next * writeback using standard nfs. */ static void nfs_redirty_request(struct nfs_page *req) { nfs_mark_request_dirty(req); nfs_end_page_writeback(req->wb_page); nfs_clear_page_tag_locked(req); } /* * Generate multiple small requests to write out a single * contiguous dirty area on one page. */ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how) { struct nfs_page *req = nfs_list_entry(head->next); struct page *page = req->wb_page; struct nfs_write_data *data; size_t wsize = NFS_SERVER(inode)->wsize, nbytes; unsigned int offset; int requests = 0; int ret = 0; LIST_HEAD(list); nfs_list_remove_request(req); nbytes = count; do { size_t len = min(nbytes, wsize); data = nfs_writedata_alloc(1); if (!data) goto out_bad; list_add(&data->pages, &list); requests++; nbytes -= len; } while (nbytes != 0); atomic_set(&req->wb_complete, requests); ClearPageError(page); offset = 0; nbytes = count; do { int ret2; data = list_entry(list.next, struct nfs_write_data, pages); list_del_init(&data->pages); data->pagevec[0] = page; if (nbytes < wsize) wsize = nbytes; ret2 = nfs_write_rpcsetup(req, data, &nfs_write_partial_ops, wsize, offset, how); if (ret == 0) ret = ret2; offset += wsize; nbytes -= wsize; } while (nbytes != 0); return ret; out_bad: while (!list_empty(&list)) { data = list_entry(list.next, struct nfs_write_data, pages); list_del(&data->pages); nfs_writedata_release(data); } nfs_redirty_request(req); return -ENOMEM; } /* * Create an RPC task for the given write request and kick it. * The page must have been locked by the caller. * * It may happen that the page we're passed is not marked dirty. * This is the case if nfs_updatepage detects a conflicting request * that has been written but not committed. */ static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how) { struct nfs_page *req; struct page **pages; struct nfs_write_data *data; data = nfs_writedata_alloc(npages); if (!data) goto out_bad; pages = data->pagevec; while (!list_empty(head)) { req = nfs_list_entry(head->next); nfs_list_remove_request(req); nfs_list_add_request(req, &data->pages); ClearPageError(req->wb_page); *pages++ = req->wb_page; } req = nfs_list_entry(data->pages.next); /* Set up the argument struct */ return nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how); out_bad: while (!list_empty(head)) { req = nfs_list_entry(head->next); nfs_list_remove_request(req); nfs_redirty_request(req); } return -ENOMEM; } static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags) { size_t wsize = NFS_SERVER(inode)->wsize; if (wsize < PAGE_CACHE_SIZE) nfs_pageio_init(pgio, inode, nfs_flush_multi, wsize, ioflags); else nfs_pageio_init(pgio, inode, nfs_flush_one, wsize, ioflags); }
int nfs_permission(struct inode *inode, int mask, struct nameidata *nd) { struct nfs_access_cache *cache = &NFS_I(inode)->cache_access; struct rpc_cred *cred; int mode = inode->i_mode; int res; if (mask == 0) return 0; if (mask & MAY_WRITE) { /* * * Nobody gets write access to a read-only fs. * */ if (IS_RDONLY(inode) && (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) return -EROFS; /* * * Nobody gets write access to an immutable file. * */ if (IS_IMMUTABLE(inode)) return -EACCES; } /* Are we checking permissions on anything other than lookup/execute? */ if ((mask & MAY_EXEC) == 0) { /* We only need to check permissions on file open() and access() */ if (!nd || !(nd->flags & (LOOKUP_OPEN|LOOKUP_ACCESS))) return 0; /* NFSv4 has atomic_open... */ if (NFS_PROTO(inode)->version > 3 && (nd->flags & LOOKUP_OPEN)) return 0; } lock_kernel(); if (!NFS_PROTO(inode)->access) goto out_notsup; cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); if (cache->cred == cred && time_before(jiffies, cache->jiffies + NFS_ATTRTIMEO(inode)) && !(NFS_FLAGS(inode) & NFS_INO_INVALID_ATTR)) { if (!(res = cache->err)) { /* Is the mask a subset of an accepted mask? */ if ((cache->mask & mask) == mask) goto out; } else { /* ...or is it a superset of a rejected mask? */ if ((cache->mask & mask) == cache->mask) goto out; } } res = NFS_PROTO(inode)->access(inode, cred, mask); if (!res || res == -EACCES) goto add_cache; out: put_rpccred(cred); unlock_kernel(); return res; out_notsup: nfs_revalidate_inode(NFS_SERVER(inode), inode); res = vfs_permission(inode, mask); unlock_kernel(); return res; add_cache: cache->jiffies = jiffies; if (cache->cred) put_rpccred(cache->cred); cache->cred = cred; cache->mask = mask; cache->err = res; unlock_kernel(); return res; }
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); nfs_refresh_inode(dir, &dir_attr); 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); 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; } /* * 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 == -ENOTSUPP) { 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); nfs_post_op_update_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_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; dprintk("NFS call remove %s\n", name->name); nfs_fattr_init(&res.dir_attr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &res.dir_attr); 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 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 dentry *dentry, struct page *page, unsigned int len, struct iattr *sattr) { struct nfs_fh fhandle; struct nfs_fattr fattr, dir_attr; struct nfs3_symlinkargs arg = { .fromfh = NFS_FH(dir), .fromname = dentry->d_name.name, .fromlen = dentry->d_name.len, .pages = &page, .pathlen = 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 (len > NFS3_MAXPATHLEN) return -ENAMETOOLONG; dprintk("NFS call symlink %s\n", dentry->d_name.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); if (status != 0) goto out; status = nfs_instantiate(dentry, &fhandle, &fattr); 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 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; __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 = &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; 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_invalidate_atime(dir); nfs_refresh_inode(dir, &dir_attr); dprintk("NFS reply readdir: %d\n", status); 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->nfs_client->cl_rpcclient, &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; 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, .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, .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, };
/* * This function is called when the WRITE call is complete. */ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) { struct nfs_writeargs *argp = &data->args; struct nfs_writeres *resp = &data->res; struct nfs_server *server = NFS_SERVER(data->inode); int status; dprintk("NFS: %5u nfs_writeback_done (status %d)\n", task->tk_pid, task->tk_status); /* * ->write_done will attempt to use post-op attributes to detect * conflicting writes by other clients. A strict interpretation * of close-to-open would allow us to continue caching even if * another writer had changed the file, but some applications * depend on tighter cache coherency when writing. */ status = NFS_PROTO(data->inode)->write_done(task, data); if (status != 0) return status; nfs_add_stats(data->inode, NFSIOS_SERVERWRITTENBYTES, resp->count); #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) if (resp->verf->committed < argp->stable && task->tk_status >= 0) { /* We tried a write call, but the server did not * commit data to stable storage even though we * requested it. * Note: There is a known bug in Tru64 < 5.0 in which * the server reports NFS_DATA_SYNC, but performs * NFS_FILE_SYNC. We therefore implement this checking * as a dprintk() in order to avoid filling syslog. */ static unsigned long complain; if (time_before(complain, jiffies)) { dprintk("NFS: faulty NFS server %s:" " (committed = %d) != (stable = %d)\n", server->nfs_client->cl_hostname, resp->verf->committed, argp->stable); complain = jiffies + 300 * HZ; } } #endif /* Is this a short write? */ if (task->tk_status >= 0 && resp->count < argp->count) { static unsigned long complain; nfs_inc_stats(data->inode, NFSIOS_SHORTWRITE); /* Has the server at least made some progress? */ if (resp->count != 0) { /* Was this an NFSv2 write or an NFSv3 stable write? */ if (resp->verf->committed != NFS_UNSTABLE) { /* Resend from where the server left off */ argp->offset += resp->count; argp->pgbase += resp->count; argp->count -= resp->count; } else { /* Resend as a stable write in order to avoid * headaches in the case of a server crash. */ argp->stable = NFS_FILE_SYNC; } nfs4_restart_rpc(task, server->nfs_client); return -EAGAIN; } if (time_before(complain, jiffies)) { printk(KERN_WARNING "NFS: Server wrote zero bytes, expected %u.\n", argp->count); complain = jiffies + 300 * HZ; } /* Can't do anything about it except throw an error. */ task->tk_status = -EIO; } nfs4_sequence_free_slot(server->nfs_client, &data->res.seq_res); return 0; }
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, loff_t offset, loff_t len) { struct inode *inode = file_inode(filep); struct nfs_server *server = NFS_SERVER(inode); struct nfs42_falloc_args args = { .falloc_fh = NFS_FH(inode), .falloc_offset = offset, .falloc_length = len, .falloc_bitmask = server->cache_consistency_bitmask, }; struct nfs42_falloc_res res = { .falloc_server = server, }; int status; msg->rpc_argp = &args; msg->rpc_resp = &res; status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE); if (status) return status; res.falloc_fattr = nfs_alloc_fattr(); if (!res.falloc_fattr) return -ENOMEM; status = nfs4_call_sync(server->client, server, msg, &args.seq_args, &res.seq_res, 0); if (status == 0) status = nfs_post_op_update_inode(inode, res.falloc_fattr); kfree(res.falloc_fattr); return status; } static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, loff_t offset, loff_t len) { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; int err; do { err = _nfs42_proc_fallocate(msg, filep, offset, len); if (err == -ENOTSUPP) return -EOPNOTSUPP; err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); return err; } int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], }; struct inode *inode = file_inode(filep); int err; if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) return -EOPNOTSUPP; mutex_lock(&inode->i_mutex); err = nfs42_proc_fallocate(&msg, filep, offset, len); if (err == -EOPNOTSUPP) NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; mutex_unlock(&inode->i_mutex); return err; } int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], }; struct inode *inode = file_inode(filep); int err; if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) return -EOPNOTSUPP; nfs_wb_all(inode); mutex_lock(&inode->i_mutex); err = nfs42_proc_fallocate(&msg, filep, offset, len); if (err == 0) truncate_pagecache_range(inode, offset, (offset + len) -1); if (err == -EOPNOTSUPP) NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; mutex_unlock(&inode->i_mutex); return err; } loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) { struct inode *inode = file_inode(filep); struct nfs42_seek_args args = { .sa_fh = NFS_FH(inode), .sa_offset = offset, .sa_what = (whence == SEEK_HOLE) ? NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, }; struct nfs42_seek_res res; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], .rpc_argp = &args, .rpc_resp = &res, }; struct nfs_server *server = NFS_SERVER(inode); int status; if (!nfs_server_capable(inode, NFS_CAP_SEEK)) return -ENOTSUPP; status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); if (status) return status; nfs_wb_all(inode); status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (status == -ENOTSUPP) server->caps &= ~NFS_CAP_SEEK; if (status) return status; return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); }
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, struct nfs_lock_context *lock, loff_t offset, loff_t len) { struct inode *inode = file_inode(filep); struct nfs_server *server = NFS_SERVER(inode); struct nfs42_falloc_args args = { .falloc_fh = NFS_FH(inode), .falloc_offset = offset, .falloc_length = len, .falloc_bitmask = server->cache_consistency_bitmask, }; struct nfs42_falloc_res res = { .falloc_server = server, }; int status; msg->rpc_argp = &args; msg->rpc_resp = &res; status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, lock, FMODE_WRITE); if (status) return status; res.falloc_fattr = nfs_alloc_fattr(); if (!res.falloc_fattr) return -ENOMEM; status = nfs4_call_sync(server->client, server, msg, &args.seq_args, &res.seq_res, 0); if (status == 0) status = nfs_post_op_update_inode(inode, res.falloc_fattr); kfree(res.falloc_fattr); return status; } static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, loff_t offset, loff_t len) { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; struct nfs_lock_context *lock; int err; lock = nfs_get_lock_context(nfs_file_open_context(filep)); if (IS_ERR(lock)) return PTR_ERR(lock); exception.inode = file_inode(filep); exception.state = lock->open_context->state; do { err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); if (err == -ENOTSUPP) { err = -EOPNOTSUPP; break; } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); nfs_put_lock_context(lock); return err; } int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], }; struct inode *inode = file_inode(filep); int err; if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) return -EOPNOTSUPP; inode_lock(inode); err = nfs42_proc_fallocate(&msg, filep, offset, len); if (err == -EOPNOTSUPP) NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; inode_unlock(inode); return err; } int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], }; struct inode *inode = file_inode(filep); int err; if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) return -EOPNOTSUPP; inode_lock(inode); err = nfs_sync_inode(inode); if (err) goto out_unlock; err = nfs42_proc_fallocate(&msg, filep, offset, len); if (err == 0) truncate_pagecache_range(inode, offset, (offset + len) -1); if (err == -EOPNOTSUPP) NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; out_unlock: inode_unlock(inode); return err; } static ssize_t _nfs42_proc_copy(struct file *src, struct nfs_lock_context *src_lock, struct file *dst, struct nfs_lock_context *dst_lock, struct nfs42_copy_args *args, struct nfs42_copy_res *res) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], .rpc_argp = args, .rpc_resp = res, }; struct inode *dst_inode = file_inode(dst); struct nfs_server *server = NFS_SERVER(dst_inode); loff_t pos_src = args->src_pos; loff_t pos_dst = args->dst_pos; size_t count = args->count; ssize_t status; status = nfs4_set_rw_stateid(&args->src_stateid, src_lock->open_context, src_lock, FMODE_READ); if (status) return status; status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping, pos_src, pos_src + (loff_t)count - 1); if (status) return status; status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context, dst_lock, FMODE_WRITE); if (status) return status; status = nfs_sync_inode(dst_inode); if (status) return status; res->commit_res.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS); if (!res->commit_res.verf) return -ENOMEM; status = nfs4_call_sync(server->client, server, &msg, &args->seq_args, &res->seq_res, 0); if (status == -ENOTSUPP) server->caps &= ~NFS_CAP_COPY; if (status) goto out; if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier, &res->commit_res.verf->verifier)) { status = -EAGAIN; goto out; } truncate_pagecache_range(dst_inode, pos_dst, pos_dst + res->write_res.count); status = res->write_res.count; out: kfree(res->commit_res.verf); return status; } ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, struct file *dst, loff_t pos_dst, size_t count) { struct nfs_server *server = NFS_SERVER(file_inode(dst)); struct nfs_lock_context *src_lock; struct nfs_lock_context *dst_lock; struct nfs42_copy_args args = { .src_fh = NFS_FH(file_inode(src)), .src_pos = pos_src, .dst_fh = NFS_FH(file_inode(dst)), .dst_pos = pos_dst, .count = count, }; struct nfs42_copy_res res; struct nfs4_exception src_exception = { .inode = file_inode(src), .stateid = &args.src_stateid, }; struct nfs4_exception dst_exception = { .inode = file_inode(dst), .stateid = &args.dst_stateid, }; ssize_t err, err2; if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY)) return -EOPNOTSUPP; src_lock = nfs_get_lock_context(nfs_file_open_context(src)); if (IS_ERR(src_lock)) return PTR_ERR(src_lock); src_exception.state = src_lock->open_context->state; dst_lock = nfs_get_lock_context(nfs_file_open_context(dst)); if (IS_ERR(dst_lock)) { err = PTR_ERR(dst_lock); goto out_put_src_lock; } dst_exception.state = dst_lock->open_context->state; do { inode_lock(file_inode(dst)); err = _nfs42_proc_copy(src, src_lock, dst, dst_lock, &args, &res); inode_unlock(file_inode(dst)); if (err >= 0) break; if (err == -ENOTSUPP) { err = -EOPNOTSUPP; break; } if (err == -EAGAIN) { dst_exception.retry = 1; continue; } err2 = nfs4_handle_exception(server, err, &src_exception); err = nfs4_handle_exception(server, err, &dst_exception); if (!err) err = err2; } while (src_exception.retry || dst_exception.retry); nfs_put_lock_context(dst_lock); out_put_src_lock: nfs_put_lock_context(src_lock); return err; } static loff_t _nfs42_proc_llseek(struct file *filep, struct nfs_lock_context *lock, loff_t offset, int whence) { struct inode *inode = file_inode(filep); struct nfs42_seek_args args = { .sa_fh = NFS_FH(inode), .sa_offset = offset, .sa_what = (whence == SEEK_HOLE) ? NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, }; struct nfs42_seek_res res; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], .rpc_argp = &args, .rpc_resp = &res, }; struct nfs_server *server = NFS_SERVER(inode); int status; if (!nfs_server_capable(inode, NFS_CAP_SEEK)) return -ENOTSUPP; status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, lock, FMODE_READ); if (status) return status; status = nfs_filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); if (status) return status; status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (status == -ENOTSUPP) server->caps &= ~NFS_CAP_SEEK; if (status) return status; return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); } loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; struct nfs_lock_context *lock; loff_t err; lock = nfs_get_lock_context(nfs_file_open_context(filep)); if (IS_ERR(lock)) return PTR_ERR(lock); exception.inode = file_inode(filep); exception.state = lock->open_context->state; do { err = _nfs42_proc_llseek(filep, lock, offset, whence); if (err >= 0) break; if (err == -ENOTSUPP) { err = -EOPNOTSUPP; break; } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); nfs_put_lock_context(lock); return err; } static void nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) { struct nfs42_layoutstat_data *data = calldata; struct inode *inode = data->inode; struct nfs_server *server = NFS_SERVER(inode); struct pnfs_layout_hdr *lo; spin_lock(&inode->i_lock); lo = NFS_I(inode)->layout; if (!pnfs_layout_is_valid(lo)) { spin_unlock(&inode->i_lock); rpc_exit(task, 0); return; } nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid); spin_unlock(&inode->i_lock); nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, &data->res.seq_res, task); } static void nfs42_layoutstat_done(struct rpc_task *task, void *calldata) { struct nfs42_layoutstat_data *data = calldata; struct inode *inode = data->inode; struct pnfs_layout_hdr *lo; if (!nfs4_sequence_done(task, &data->res.seq_res)) return; switch (task->tk_status) { case 0: break; case -NFS4ERR_BADHANDLE: case -ESTALE: pnfs_destroy_layout(NFS_I(inode)); break; case -NFS4ERR_EXPIRED: case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_DELEG_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_BAD_STATEID: spin_lock(&inode->i_lock); lo = NFS_I(inode)->layout; if (pnfs_layout_is_valid(lo) && nfs4_stateid_match(&data->args.stateid, &lo->plh_stateid)) { LIST_HEAD(head); /* * Mark the bad layout state as invalid, then retry * with the current stateid. */ pnfs_mark_layout_stateid_invalid(lo, &head); spin_unlock(&inode->i_lock); pnfs_free_lseg_list(&head); nfs_commit_inode(inode, 0); } else spin_unlock(&inode->i_lock); break; case -NFS4ERR_OLD_STATEID: spin_lock(&inode->i_lock); lo = NFS_I(inode)->layout; if (pnfs_layout_is_valid(lo) && nfs4_stateid_match_other(&data->args.stateid, &lo->plh_stateid)) { /* Do we need to delay before resending? */ if (!nfs4_stateid_is_newer(&lo->plh_stateid, &data->args.stateid)) rpc_delay(task, HZ); rpc_restart_call_prepare(task); } spin_unlock(&inode->i_lock); break; case -ENOTSUPP: case -EOPNOTSUPP: NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; } } static void nfs42_layoutstat_release(void *calldata) { struct nfs42_layoutstat_data *data = calldata; struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo; int i; for (i = 0; i < data->args.num_dev; i++) { if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free) devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); } pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); smp_mb__before_atomic(); clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); smp_mb__after_atomic(); nfs_iput_and_deactive(data->inode); kfree(data->args.devinfo); kfree(data); } static const struct rpc_call_ops nfs42_layoutstat_ops = { .rpc_call_prepare = nfs42_layoutstat_prepare, .rpc_call_done = nfs42_layoutstat_done, .rpc_release = nfs42_layoutstat_release, }; int nfs42_proc_layoutstats_generic(struct nfs_server *server, struct nfs42_layoutstat_data *data) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], .rpc_argp = &data->args, .rpc_resp = &data->res, }; struct rpc_task_setup task_setup = { .rpc_client = server->client, .rpc_message = &msg, .callback_ops = &nfs42_layoutstat_ops, .callback_data = data, .flags = RPC_TASK_ASYNC, }; struct rpc_task *task; data->inode = nfs_igrab_and_active(data->args.inode); if (!data->inode) { nfs42_layoutstat_release(data); return -EAGAIN; } nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); task = rpc_run_task(&task_setup); if (IS_ERR(task)) return PTR_ERR(task); rpc_put_task(task); return 0; } static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, struct file *dst_f, struct nfs_lock_context *src_lock, struct nfs_lock_context *dst_lock, loff_t src_offset, loff_t dst_offset, loff_t count) { struct inode *src_inode = file_inode(src_f); struct inode *dst_inode = file_inode(dst_f); struct nfs_server *server = NFS_SERVER(dst_inode); struct nfs42_clone_args args = { .src_fh = NFS_FH(src_inode), .dst_fh = NFS_FH(dst_inode), .src_offset = src_offset, .dst_offset = dst_offset, .count = count, .dst_bitmask = server->cache_consistency_bitmask, }; struct nfs42_clone_res res = { .server = server, }; int status; msg->rpc_argp = &args; msg->rpc_resp = &res; status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, src_lock, FMODE_READ); if (status) return status; status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, dst_lock, FMODE_WRITE); if (status) return status; res.dst_fattr = nfs_alloc_fattr(); if (!res.dst_fattr) return -ENOMEM; status = nfs4_call_sync(server->client, server, msg, &args.seq_args, &res.seq_res, 0); if (status == 0) status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); kfree(res.dst_fattr); return status; } int nfs42_proc_clone(struct file *src_f, struct file *dst_f, loff_t src_offset, loff_t dst_offset, loff_t count) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], }; struct inode *inode = file_inode(src_f); struct nfs_server *server = NFS_SERVER(file_inode(src_f)); struct nfs_lock_context *src_lock; struct nfs_lock_context *dst_lock; struct nfs4_exception src_exception = { }; struct nfs4_exception dst_exception = { }; int err, err2; if (!nfs_server_capable(inode, NFS_CAP_CLONE)) return -EOPNOTSUPP; src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); if (IS_ERR(src_lock)) return PTR_ERR(src_lock); src_exception.inode = file_inode(src_f); src_exception.state = src_lock->open_context->state; dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); if (IS_ERR(dst_lock)) { err = PTR_ERR(dst_lock); goto out_put_src_lock; } dst_exception.inode = file_inode(dst_f); dst_exception.state = dst_lock->open_context->state; do { err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, src_offset, dst_offset, count); if (err == -ENOTSUPP || err == -EOPNOTSUPP) { NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; err = -EOPNOTSUPP; break; } err2 = nfs4_handle_exception(server, err, &src_exception); err = nfs4_handle_exception(server, err, &dst_exception); if (!err) err = err2; } while (src_exception.retry || dst_exception.retry); nfs_put_lock_context(dst_lock); out_put_src_lock: nfs_put_lock_context(src_lock); return err; }
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_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) { if (nfs_async_handle_expired_key(task)) return 0; nfs_mark_for_revalidate(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 = { .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 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; 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, .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, .lock = nfs_proc_lock, .lock_check_bounds = nfs_lock_check_bounds, .close_context = nfs_close_context, };
static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) { struct vfsmount *mnt; struct nfs_server *server = NFS_SERVER(dentry->d_inode); struct dentry *parent; struct nfs_fh *fh = NULL; struct nfs_fattr *fattr = NULL; int err; dprintk("--> nfs_follow_mountpoint()\n"); err = -ESTALE; if (IS_ROOT(dentry)) goto out_err; err = -ENOMEM; fh = nfs_alloc_fhandle(); fattr = nfs_alloc_fattr(); if (fh == NULL || fattr == NULL) goto out_err; dprintk("%s: enter\n", __func__); dput(nd->path.dentry); nd->path.dentry = dget(dentry); /* Look it up again */ parent = dget_parent(nd->path.dentry); err = server->nfs_client->rpc_ops->lookup(parent->d_inode, &nd->path.dentry->d_name, fh, fattr); dput(parent); if (err != 0) goto out_err; if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) mnt = nfs_do_refmount(nd->path.mnt, nd->path.dentry); else mnt = nfs_do_submount(nd->path.mnt, nd->path.dentry, fh, fattr); err = PTR_ERR(mnt); if (IS_ERR(mnt)) goto out_err; mntget(mnt); err = do_add_mount(mnt, &nd->path, nd->path.mnt->mnt_flags|MNT_SHRINKABLE, &nfs_automount_list); if (err < 0) { mntput(mnt); if (err == -EBUSY) goto out_follow; goto out_err; } path_put(&nd->path); nd->path.mnt = mnt; nd->path.dentry = dget(mnt->mnt_root); schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout); out: nfs_free_fattr(fattr); nfs_free_fhandle(fh); dprintk("%s: done, returned %d\n", __func__, err); dprintk("<-- nfs_follow_mountpoint() = %d\n", err); return ERR_PTR(err); out_err: path_put(&nd->path); goto out; out_follow: while (d_mountpoint(nd->path.dentry) && follow_down(&nd->path)) ; err = 0; goto out; }
struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) { struct nfs_server *server = NFS_SERVER(inode); struct nfs_fattr fattr; struct page *pages[NFSACL_MAXPAGES] = { }; struct nfs3_getaclargs args = { .fh = NFS_FH(inode), /* The xdr layer may allocate pages here. */ .pages = pages, }; struct nfs3_getaclres res = { .fattr = &fattr, }; struct posix_acl *acl; int status, count; if (!nfs_server_capable(inode, NFS_CAP_ACLS)) return ERR_PTR(-EOPNOTSUPP); status = nfs_revalidate_inode(server, inode); if (status < 0) return ERR_PTR(status); acl = nfs3_get_cached_acl(inode, type); if (acl != ERR_PTR(-EAGAIN)) return acl; acl = NULL; /* * Only get the access acl when explicitly requested: We don't * need it for access decisions, and only some applications use * it. Applications which request the access acl first are not * penalized from this optimization. */ if (type == ACL_TYPE_ACCESS) args.mask |= NFS_ACLCNT|NFS_ACL; if (S_ISDIR(inode->i_mode)) args.mask |= NFS_DFACLCNT|NFS_DFACL; if (args.mask == 0) return NULL; dprintk("NFS call getacl\n"); status = rpc_call(server->client_acl, ACLPROC3_GETACL, &args, &res, 0); dprintk("NFS reply getacl: %d\n", status); /* pages may have been allocated at the xdr layer. */ for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++) __free_page(args.pages[count]); switch (status) { case 0: status = nfs_refresh_inode(inode, &fattr); break; case -EPFNOSUPPORT: case -EPROTONOSUPPORT: dprintk("NFS_V3_ACL extension not supported; disabling\n"); server->caps &= ~NFS_CAP_ACLS; case -ENOTSUPP: status = -EOPNOTSUPP; default: goto getout; } if ((args.mask & res.mask) != args.mask) { status = -EIO; goto getout; } if (res.acl_access != NULL) { if (posix_acl_equiv_mode(res.acl_access, NULL) == 0) { posix_acl_release(res.acl_access); res.acl_access = NULL; } } nfs3_cache_acls(inode, res.acl_access, res.acl_default); switch(type) { case ACL_TYPE_ACCESS: acl = res.acl_access; res.acl_access = NULL; break; case ACL_TYPE_DEFAULT: acl = res.acl_default; res.acl_default = NULL; } getout: posix_acl_release(res.acl_access); posix_acl_release(res.acl_default); if (status != 0) { posix_acl_release(acl); acl = ERR_PTR(status); } return acl; }
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, struct nfs_lock_context *lock, loff_t offset, loff_t len) { struct inode *inode = file_inode(filep); struct nfs_server *server = NFS_SERVER(inode); struct nfs42_falloc_args args = { .falloc_fh = NFS_FH(inode), .falloc_offset = offset, .falloc_length = len, .falloc_bitmask = server->cache_consistency_bitmask, }; struct nfs42_falloc_res res = { .falloc_server = server, }; int status; msg->rpc_argp = &args; msg->rpc_resp = &res; status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, lock, FMODE_WRITE); if (status) return status; res.falloc_fattr = nfs_alloc_fattr(); if (!res.falloc_fattr) return -ENOMEM; status = nfs4_call_sync(server->client, server, msg, &args.seq_args, &res.seq_res, 0); if (status == 0) status = nfs_post_op_update_inode(inode, res.falloc_fattr); kfree(res.falloc_fattr); return status; } static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, loff_t offset, loff_t len) { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; struct nfs_lock_context *lock; int err; lock = nfs_get_lock_context(nfs_file_open_context(filep)); if (IS_ERR(lock)) return PTR_ERR(lock); exception.inode = file_inode(filep); exception.state = lock->open_context->state; do { err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); if (err == -ENOTSUPP) { err = -EOPNOTSUPP; break; } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); nfs_put_lock_context(lock); return err; } int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], }; struct inode *inode = file_inode(filep); int err; if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) return -EOPNOTSUPP; inode_lock(inode); err = nfs42_proc_fallocate(&msg, filep, offset, len); if (err == -EOPNOTSUPP) NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; inode_unlock(inode); return err; } int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], }; struct inode *inode = file_inode(filep); int err; if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) return -EOPNOTSUPP; nfs_wb_all(inode); inode_lock(inode); err = nfs42_proc_fallocate(&msg, filep, offset, len); if (err == 0) truncate_pagecache_range(inode, offset, (offset + len) -1); if (err == -EOPNOTSUPP) NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; inode_unlock(inode); return err; } static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src, struct nfs_lock_context *src_lock, struct file *dst, loff_t pos_dst, struct nfs_lock_context *dst_lock, size_t count) { struct nfs42_copy_args args = { .src_fh = NFS_FH(file_inode(src)), .src_pos = pos_src, .dst_fh = NFS_FH(file_inode(dst)), .dst_pos = pos_dst, .count = count, }; struct nfs42_copy_res res; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], .rpc_argp = &args, .rpc_resp = &res, }; struct inode *dst_inode = file_inode(dst); struct nfs_server *server = NFS_SERVER(dst_inode); int status; status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, src_lock, FMODE_READ); if (status) return status; status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, dst_lock, FMODE_WRITE); if (status) return status; status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (status == -ENOTSUPP) server->caps &= ~NFS_CAP_COPY; if (status) return status; if (res.write_res.verifier.committed != NFS_FILE_SYNC) { status = nfs_commit_file(dst, &res.write_res.verifier.verifier); if (status) return status; } truncate_pagecache_range(dst_inode, pos_dst, pos_dst + res.write_res.count); return res.write_res.count; } ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, struct file *dst, loff_t pos_dst, size_t count) { struct nfs_server *server = NFS_SERVER(file_inode(dst)); struct nfs_lock_context *src_lock; struct nfs_lock_context *dst_lock; struct nfs4_exception src_exception = { }; struct nfs4_exception dst_exception = { }; ssize_t err, err2; if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY)) return -EOPNOTSUPP; src_lock = nfs_get_lock_context(nfs_file_open_context(src)); if (IS_ERR(src_lock)) return PTR_ERR(src_lock); src_exception.inode = file_inode(src); src_exception.state = src_lock->open_context->state; dst_lock = nfs_get_lock_context(nfs_file_open_context(dst)); if (IS_ERR(dst_lock)) { err = PTR_ERR(dst_lock); goto out_put_src_lock; } dst_exception.inode = file_inode(dst); dst_exception.state = dst_lock->open_context->state; do { inode_lock(file_inode(dst)); err = _nfs42_proc_copy(src, pos_src, src_lock, dst, pos_dst, dst_lock, count); inode_unlock(file_inode(dst)); if (err == -ENOTSUPP) { err = -EOPNOTSUPP; break; } err2 = nfs4_handle_exception(server, err, &src_exception); err = nfs4_handle_exception(server, err, &dst_exception); if (!err) err = err2; } while (src_exception.retry || dst_exception.retry); nfs_put_lock_context(dst_lock); out_put_src_lock: nfs_put_lock_context(src_lock); return err; } static loff_t _nfs42_proc_llseek(struct file *filep, struct nfs_lock_context *lock, loff_t offset, int whence) { struct inode *inode = file_inode(filep); struct nfs42_seek_args args = { .sa_fh = NFS_FH(inode), .sa_offset = offset, .sa_what = (whence == SEEK_HOLE) ? NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, }; struct nfs42_seek_res res; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], .rpc_argp = &args, .rpc_resp = &res, }; struct nfs_server *server = NFS_SERVER(inode); int status; if (!nfs_server_capable(inode, NFS_CAP_SEEK)) return -ENOTSUPP; status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, lock, FMODE_READ); if (status) return status; nfs_wb_all(inode); status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (status == -ENOTSUPP) server->caps &= ~NFS_CAP_SEEK; if (status) return status; return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); } loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) { struct nfs_server *server = NFS_SERVER(file_inode(filep)); struct nfs4_exception exception = { }; struct nfs_lock_context *lock; loff_t err; lock = nfs_get_lock_context(nfs_file_open_context(filep)); if (IS_ERR(lock)) return PTR_ERR(lock); exception.inode = file_inode(filep); exception.state = lock->open_context->state; do { err = _nfs42_proc_llseek(filep, lock, offset, whence); if (err >= 0) break; if (err == -ENOTSUPP) { err = -EOPNOTSUPP; break; } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); nfs_put_lock_context(lock); return err; } static void nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) { struct nfs42_layoutstat_data *data = calldata; struct nfs_server *server = NFS_SERVER(data->args.inode); nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args, &data->res.seq_res, task); } static void nfs42_layoutstat_done(struct rpc_task *task, void *calldata) { struct nfs42_layoutstat_data *data = calldata; struct inode *inode = data->inode; struct pnfs_layout_hdr *lo; if (!nfs4_sequence_done(task, &data->res.seq_res)) return; switch (task->tk_status) { case 0: break; case -NFS4ERR_EXPIRED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_OLD_STATEID: case -NFS4ERR_BAD_STATEID: spin_lock(&inode->i_lock); lo = NFS_I(inode)->layout; if (lo && nfs4_stateid_match(&data->args.stateid, &lo->plh_stateid)) { LIST_HEAD(head); /* * Mark the bad layout state as invalid, then retry * with the current stateid. */ set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0); spin_unlock(&inode->i_lock); pnfs_free_lseg_list(&head); } else spin_unlock(&inode->i_lock); break; case -ENOTSUPP: case -EOPNOTSUPP: NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; default: break; } dprintk("%s server returns %d\n", __func__, task->tk_status); } static void nfs42_layoutstat_release(void *calldata) { struct nfs42_layoutstat_data *data = calldata; struct nfs_server *nfss = NFS_SERVER(data->args.inode); if (nfss->pnfs_curr_ld->cleanup_layoutstats) nfss->pnfs_curr_ld->cleanup_layoutstats(data); pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); smp_mb__before_atomic(); clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); smp_mb__after_atomic(); nfs_iput_and_deactive(data->inode); kfree(data->args.devinfo); kfree(data); } static const struct rpc_call_ops nfs42_layoutstat_ops = { .rpc_call_prepare = nfs42_layoutstat_prepare, .rpc_call_done = nfs42_layoutstat_done, .rpc_release = nfs42_layoutstat_release, }; int nfs42_proc_layoutstats_generic(struct nfs_server *server, struct nfs42_layoutstat_data *data) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], .rpc_argp = &data->args, .rpc_resp = &data->res, }; struct rpc_task_setup task_setup = { .rpc_client = server->client, .rpc_message = &msg, .callback_ops = &nfs42_layoutstat_ops, .callback_data = data, .flags = RPC_TASK_ASYNC, }; struct rpc_task *task; data->inode = nfs_igrab_and_active(data->args.inode); if (!data->inode) { nfs42_layoutstat_release(data); return -EAGAIN; } nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); task = rpc_run_task(&task_setup); if (IS_ERR(task)) return PTR_ERR(task); return 0; } static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, struct file *dst_f, struct nfs_lock_context *src_lock, struct nfs_lock_context *dst_lock, loff_t src_offset, loff_t dst_offset, loff_t count) { struct inode *src_inode = file_inode(src_f); struct inode *dst_inode = file_inode(dst_f); struct nfs_server *server = NFS_SERVER(dst_inode); struct nfs42_clone_args args = { .src_fh = NFS_FH(src_inode), .dst_fh = NFS_FH(dst_inode), .src_offset = src_offset, .dst_offset = dst_offset, .count = count, .dst_bitmask = server->cache_consistency_bitmask, }; struct nfs42_clone_res res = { .server = server, }; int status; msg->rpc_argp = &args; msg->rpc_resp = &res; status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, src_lock, FMODE_READ); if (status) return status; status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, dst_lock, FMODE_WRITE); if (status) return status; res.dst_fattr = nfs_alloc_fattr(); if (!res.dst_fattr) return -ENOMEM; status = nfs4_call_sync(server->client, server, msg, &args.seq_args, &res.seq_res, 0); if (status == 0) status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); kfree(res.dst_fattr); return status; } int nfs42_proc_clone(struct file *src_f, struct file *dst_f, loff_t src_offset, loff_t dst_offset, loff_t count) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], }; struct inode *inode = file_inode(src_f); struct nfs_server *server = NFS_SERVER(file_inode(src_f)); struct nfs_lock_context *src_lock; struct nfs_lock_context *dst_lock; struct nfs4_exception src_exception = { }; struct nfs4_exception dst_exception = { }; int err, err2; if (!nfs_server_capable(inode, NFS_CAP_CLONE)) return -EOPNOTSUPP; src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); if (IS_ERR(src_lock)) return PTR_ERR(src_lock); src_exception.inode = file_inode(src_f); src_exception.state = src_lock->open_context->state; dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); if (IS_ERR(dst_lock)) { err = PTR_ERR(dst_lock); goto out_put_src_lock; } dst_exception.inode = file_inode(dst_f); dst_exception.state = dst_lock->open_context->state; do { err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, src_offset, dst_offset, count); if (err == -ENOTSUPP || err == -EOPNOTSUPP) { NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; err = -EOPNOTSUPP; break; } err2 = nfs4_handle_exception(server, err, &src_exception); err = nfs4_handle_exception(server, err, &dst_exception); if (!err) err = err2; } while (src_exception.retry || dst_exception.retry); nfs_put_lock_context(dst_lock); out_put_src_lock: nfs_put_lock_context(src_lock); return err; }
/* * Write a page synchronously. * Offset is the data offset within the page. */ static int nfs_writepage_sync(struct file *file, struct inode *inode, struct page *page, unsigned int offset, unsigned int count) { struct rpc_cred *cred = NULL; loff_t base; unsigned int wsize = NFS_SERVER(inode)->wsize; int result, refresh = 0, written = 0, flags; u8 *buffer; struct nfs_fattr fattr; struct nfs_writeverf verf; if (file) cred = get_rpccred(nfs_file_cred(file)); if (!cred) cred = get_rpccred(NFS_I(inode)->mm_cred); dprintk("NFS: nfs_writepage_sync(%x/%Ld %d@%Ld)\n", inode->i_dev, (long long)NFS_FILEID(inode), count, (long long)(page_offset(page) + offset)); base = page_offset(page) + offset; flags = ((IS_SWAPFILE(inode)) ? NFS_RW_SWAP : 0) | NFS_RW_SYNC; do { if (count < wsize && !IS_SWAPFILE(inode)) wsize = count; result = NFS_PROTO(inode)->write(inode, cred, &fattr, flags, offset, wsize, page, &verf); nfs_write_attributes(inode, &fattr); if (result < 0) { /* Must mark the page invalid after I/O error */ ClearPageUptodate(page); goto io_error; } if (result != wsize) printk("NFS: short write, wsize=%u, result=%d\n", wsize, result); refresh = 1; buffer += wsize; base += wsize; offset += wsize; written += wsize; count -= wsize; /* * If we've extended the file, update the inode * now so we don't invalidate the cache. */ if (base > inode->i_size) inode->i_size = base; } while (count); if (PageError(page)) ClearPageError(page); io_error: if (cred) put_rpccred(cred); return written? written : result; }