| /* |
| * linux/fs/nfs/proc.c |
| * |
| * Copyright (C) 1992, 1993, 1994 Rick Sladkey |
| * |
| * OS-independent nfs remote procedure call functions |
| * |
| * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers |
| * so at last we can have decent(ish) throughput off a |
| * Sun server. |
| * |
| * Coding optimized and cleaned up by Florian La Roche. |
| * Note: Error returns are optimized for NFS_OK, which isn't translated via |
| * nfs_stat_to_errno(), but happens to be already the right return code. |
| * |
| * Also, the code currently doesn't check the size of the packet, when |
| * it decodes the packet. |
| * |
| * Feel free to fix it and mail me the diffs if it worries you. |
| * |
| * Completely rewritten to support the new RPC call interface; |
| * rewrote and moved the entire XDR stuff to xdr.c |
| * --Olaf Kirch June 1996 |
| * |
| * The code below initializes all auto variables explicitly, otherwise |
| * it will fail to work as a module (gcc generates a memset call for an |
| * incomplete struct). |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/param.h> |
| #include <linux/slab.h> |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| #include <linux/utsname.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/in.h> |
| #include <linux/pagemap.h> |
| #include <linux/sunrpc/clnt.h> |
| #include <linux/nfs.h> |
| #include <linux/nfs2.h> |
| #include <linux/nfs_fs.h> |
| |
| #define NFSDBG_FACILITY NFSDBG_PROC |
| |
| /* |
| * Bare-bones access to getattr: this is for nfs_read_super. |
| */ |
| static int |
| nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr) |
| { |
| int status; |
| |
| dprintk("NFS call getroot\n"); |
| fattr->valid = 0; |
| status = rpc_call(server->client, NFSPROC_GETATTR, fhandle, fattr, 0); |
| dprintk("NFS reply getroot\n"); |
| return status; |
| } |
| |
| /* |
| * One function for each procedure in the NFS protocol. |
| */ |
| static int |
| nfs_proc_getattr(struct inode *inode, struct nfs_fattr *fattr) |
| { |
| int status; |
| |
| dprintk("NFS call getattr\n"); |
| fattr->valid = 0; |
| status = rpc_call(NFS_CLIENT(inode), NFSPROC_GETATTR, |
| NFS_FH(inode), fattr, 0); |
| dprintk("NFS reply getattr\n"); |
| return status; |
| } |
| |
| static int |
| nfs_proc_setattr(struct inode *inode, struct nfs_fattr *fattr, |
| struct iattr *sattr) |
| { |
| struct nfs_sattrargs arg = { NFS_FH(inode), sattr }; |
| int status; |
| |
| dprintk("NFS call setattr\n"); |
| fattr->valid = 0; |
| status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0); |
| dprintk("NFS reply setattr\n"); |
| 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 = { NFS_FH(dir), name->name, name->len }; |
| struct nfs_diropok res = { fhandle, 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 = { NFS_FH(inode), PAGE_CACHE_SIZE, &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 inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, int flags, |
| unsigned int base, unsigned int count, |
| struct page *page, int *eofp) |
| { |
| u64 offset = page_offset(page) + base; |
| struct nfs_readargs arg = { NFS_FH(inode), offset, count, |
| base, &page }; |
| struct nfs_readres res = { fattr, count, 0}; |
| struct rpc_message msg = { NFSPROC_READ, &arg, &res, cred }; |
| int status; |
| |
| dprintk("NFS call read %d @ %Ld\n", count, (long long)offset); |
| fattr->valid = 0; |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); |
| |
| dprintk("NFS reply read: %d\n", status); |
| *eofp = res.eof; |
| return status; |
| } |
| |
| static int |
| nfs_proc_write(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, int how, |
| unsigned int base, unsigned int count, |
| struct page *page, struct nfs_writeverf *verf) |
| { |
| u64 offset = page_offset(page) + base; |
| struct nfs_writeargs arg = { NFS_FH(inode), offset, count, |
| NFS_FILE_SYNC, base, &page }; |
| struct nfs_writeres res = {fattr, verf, count}; |
| struct rpc_message msg = { NFSPROC_WRITE, &arg, &res, cred }; |
| int status, flags = 0; |
| |
| dprintk("NFS call write %d @ %Ld\n", count, (long long)offset); |
| fattr->valid = 0; |
| if (how & NFS_RW_SWAP) |
| flags |= NFS_RPC_SWAPFLAGS; |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); |
| |
| dprintk("NFS reply write: %d\n", status); |
| verf->committed = NFS_FILE_SYNC; /* NFSv2 always syncs data */ |
| return status < 0? status : count; |
| } |
| |
| static int |
| 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 = { NFS_FH(dir), name->name, |
| name->len, sattr }; |
| struct nfs_diropok res = { fhandle, 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); |
| return 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 = { NFS_FH(dir), name->name, |
| name->len, sattr }; |
| struct nfs_diropok res = { fhandle, 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 = 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 = { NFS_FH(dir), name->name, name->len }; |
| struct rpc_message msg = { NFSPROC_REMOVE, &arg, NULL, 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 = NFSPROC_REMOVE; |
| msg->rpc_argp = arg; |
| return 0; |
| } |
| |
| static void |
| nfs_proc_unlink_done(struct dentry *dir, struct rpc_message *msg) |
| { |
| if (msg->rpc_argp) { |
| NFS_CACHEINV(dir->d_inode); |
| kfree(msg->rpc_argp); |
| } |
| } |
| |
| 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 = { NFS_FH(old_dir), old_name->name, |
| old_name->len, |
| NFS_FH(new_dir), new_name->name, |
| 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 = { NFS_FH(inode), NFS_FH(dir), |
| name->name, 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 = { NFS_FH(dir), name->name, name->len, |
| path->name, path->len, 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 = { NFS_FH(dir), name->name, name->len, |
| sattr }; |
| struct nfs_diropok res = { fhandle, 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 = { NFS_FH(dir), name->name, 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 inode *dir, struct rpc_cred *cred, |
| __u64 cookie, struct page *page, |
| unsigned int count, int plus) |
| { |
| struct nfs_readdirargs arg = { NFS_FH(dir), cookie, count, &page }; |
| struct rpc_message msg = { NFSPROC_READDIR, &arg, NULL, cred }; |
| int status; |
| |
| 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); |
| return status; |
| } |
| |
| static int |
| nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int status; |
| |
| dprintk("NFS call statfs\n"); |
| memset((char *)info, 0, sizeof(*info)); |
| status = rpc_call(server->client, NFSPROC_STATFS, fhandle, info, 0); |
| dprintk("NFS reply statfs: %d\n", status); |
| return status; |
| } |
| |
| extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); |
| |
| struct nfs_rpc_ops nfs_v2_clientops = { |
| 2, /* protocol version */ |
| nfs_proc_get_root, |
| nfs_proc_getattr, |
| nfs_proc_setattr, |
| nfs_proc_lookup, |
| NULL, /* access */ |
| nfs_proc_readlink, |
| nfs_proc_read, |
| nfs_proc_write, |
| NULL, /* commit */ |
| nfs_proc_create, |
| nfs_proc_remove, |
| nfs_proc_unlink_setup, |
| nfs_proc_unlink_done, |
| nfs_proc_rename, |
| nfs_proc_link, |
| nfs_proc_symlink, |
| nfs_proc_mkdir, |
| nfs_proc_rmdir, |
| nfs_proc_readdir, |
| nfs_proc_mknod, |
| nfs_proc_statfs, |
| nfs_decode_dirent, |
| }; |