From 46e045034336a2cc90c1798cd7cc07af744ddfd6 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Wed, 19 Apr 2000 04:00:00 +0000 Subject: Merge with Linux 2.3.99-pre4. --- fs/nfs/nfs3proc.c | 477 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 477 insertions(+) create mode 100644 fs/nfs/nfs3proc.c (limited to 'fs/nfs/nfs3proc.c') diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c new file mode 100644 index 000000000..67de662a6 --- /dev/null +++ b/fs/nfs/nfs3proc.c @@ -0,0 +1,477 @@ +/* + * linux/fs/nfs/nfs3proc.c + * + * Client-side NFSv3 procedures stubs. + * + * Copyright (C) 1997, Olaf Kirch + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define NFSDBG_FACILITY NFSDBG_PROC + +/* + * Bare-bones access to getattr: this is for nfs_read_super. + */ +static int +nfs3_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, NFS3PROC_GETATTR, fhandle, fattr, 0); + dprintk("NFS reply getroot\n"); + return status; +} + +/* + * One function for each procedure in the NFS protocol. + */ +static int +nfs3_proc_getattr(struct dentry *dentry, struct nfs_fattr *fattr) +{ + int status; + + dprintk("NFS call getattr\n"); + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dentry->d_inode), NFS3PROC_GETATTR, + NFS_FH(dentry), fattr, 0); + dprintk("NFS reply getattr\n"); + return status; +} + +static int +nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, + struct iattr *sattr) +{ + struct nfs3_sattrargs arg = { NFS_FH(dentry), sattr, 0, 0 }; + int status; + + dprintk("NFS call setattr\n"); + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dentry->d_inode), NFS3PROC_SETATTR, &arg, fattr, 0); + dprintk("NFS reply setattr\n"); + return status; +} + +static int +nfs3_proc_lookup(struct dentry *dir, struct qstr *name, + struct nfs_fh *fhandle, struct nfs_fattr *fattr) +{ + struct nfs_fattr dir_attr; + struct nfs3_diropargs arg = { NFS_FH(dir), name->name, name->len }; + struct nfs3_diropres res = { &dir_attr, fhandle, fattr }; + int status; + + dprintk("NFS call lookup %s\n", name->name); + dir_attr.valid = 0; + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_LOOKUP, &arg, &res, 0); + if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_GETATTR, + fhandle, fattr, 0); + dprintk("NFS reply lookup: %d\n", status); + nfs_refresh_inode(dir->d_inode, &dir_attr); + return status; +} + +static int +nfs3_proc_access(struct dentry *dentry, int mode, int ruid) +{ + struct nfs_fattr fattr; + struct nfs3_accessargs arg = { NFS_FH(dentry), 0 }; + struct nfs3_accessres res = { &fattr, 0 }; + int status, flags; + + dprintk("NFS call access\n"); + fattr.valid = 0; + + if (mode & MAY_READ) + arg.access |= NFS3_ACCESS_READ; + if (S_ISDIR(dentry->d_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; + } + flags = (ruid) ? RPC_CALL_REALUID : 0; + status = rpc_call(NFS_CLIENT(dentry->d_inode), NFS3PROC_ACCESS, &arg, &res, flags); + nfs_refresh_inode(dentry->d_inode, &fattr); + dprintk("NFS reply access\n"); + + if (status == 0 && (arg.access & res.access) != arg.access) + status = -EACCES; + return status; +} + +static int +nfs3_proc_readlink(struct dentry *dentry, void *buffer, unsigned int buflen) +{ + struct nfs_fattr fattr; + struct nfs3_readlinkargs args = { NFS_FH(dentry), buffer, buflen }; + struct nfs3_readlinkres res = { &fattr, buffer, buflen }; + int status; + + dprintk("NFS call readlink\n"); + fattr.valid = 0; + status = rpc_call(NFS_CLIENT(dentry->d_inode), NFS3PROC_READLINK, + &args, &res, 0); + nfs_refresh_inode(dentry->d_inode, &fattr); + dprintk("NFS reply readlink: %d\n", status); + return status; +} + +static int +nfs3_proc_read(struct dentry *dentry, struct nfs_fattr *fattr, int flags, + loff_t offset, unsigned int count, void *buffer, int *eofp) +{ + struct nfs_readargs arg = { NFS_FH(dentry), offset, count, 1, + {{buffer, count}, {0,0}, {0,0}, {0,0}, + {0,0}, {0,0}, {0,0}, {0,0}} }; + struct nfs_readres res = { fattr, count, 0 }; + struct rpc_message msg = { NFS3PROC_READ, &arg, &res, NULL }; + int status; + + dprintk("NFS call read %d @ %Ld\n", count, (long long)offset); + fattr->valid = 0; + status = rpc_call_sync(NFS_CLIENT(dentry->d_inode), &msg, flags); + dprintk("NFS reply read: %d\n", status); + *eofp = res.eof; + return status; +} + +static int +nfs3_proc_write(struct dentry *dentry, struct nfs_fattr *fattr, int flags, + loff_t offset, unsigned int count, + void *buffer, struct nfs_writeverf *verf) +{ + struct nfs_writeargs arg = { NFS_FH(dentry), offset, count, + NFS_FILE_SYNC, 1, + {{buffer, count}, {0,0}, {0,0}, {0,0}, + {0,0}, {0,0}, {0,0}, {0,0}} }; + struct nfs_writeres res = { fattr, verf, 0 }; + struct rpc_message msg = { NFS3PROC_WRITE, &arg, &res, NULL }; + int status, rpcflags = 0; + + dprintk("NFS call write %d @ %Ld\n", count, (long long)offset); + fattr->valid = 0; + if (flags & NFS_RW_SWAP) + rpcflags |= NFS_RPC_SWAPFLAGS; + arg.stable = (flags & NFS_RW_SYNC) ? NFS_FILE_SYNC : NFS_UNSTABLE; + + status = rpc_call_sync(NFS_CLIENT(dentry->d_inode), &msg, rpcflags); + + dprintk("NFS reply read: %d\n", status); + return status < 0? status : res.count; +} + +/* + * Create a regular file. + * For now, we don't implement O_EXCL. + */ +static int +nfs3_proc_create(struct dentry *dir, struct qstr *name, struct iattr *sattr, + int flags, struct nfs_fh *fhandle, struct nfs_fattr *fattr) +{ + struct nfs_fattr dir_attr; + struct nfs3_createargs arg = { NFS_FH(dir), name->name, name->len, + sattr, 0, { 0, 0 } }; + struct nfs3_diropres res = { &dir_attr, fhandle, fattr }; + int status; + + dprintk("NFS call create %s\n", 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; + } + +again: + dir_attr.valid = 0; + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_CREATE, &arg, &res, 0); + nfs_refresh_inode(dir->d_inode, &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 exit; + } + goto again; + } + +exit: + dprintk("NFS reply create: %d\n", status); + + /* When we created the file with exclusive semantics, make + * sure we set the attributes afterwards. */ + if (status == 0 && arg.createmode == NFS3_CREATE_EXCLUSIVE) { + struct nfs3_sattrargs arg = { fhandle, sattr, 0, 0 }; + dprintk("NFS call setattr (post-create)\n"); + + /* 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) */ + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_SETATTR, + &arg, fattr, 0); + dprintk("NFS reply setattr (post-create): %d\n", status); + } + + return status; +} + +static int +nfs3_proc_remove(struct dentry *dir, struct qstr *name) +{ + struct nfs_fattr dir_attr; + struct nfs3_diropargs arg = { NFS_FH(dir), name->name, name->len }; + struct rpc_message msg = { NFS3PROC_REMOVE, &arg, &dir_attr, NULL }; + int status; + + dprintk("NFS call remove %s\n", name->name); + dir_attr.valid = 0; + status = rpc_call_sync(NFS_CLIENT(dir->d_inode), &msg, 0); + nfs_refresh_inode(dir->d_inode, &dir_attr); + dprintk("NFS reply remove: %d\n", status); + return status; +} + +static int +nfs3_proc_rename(struct dentry *old_dir, struct qstr *old_name, + struct dentry *new_dir, struct qstr *new_name) +{ + struct nfs_fattr old_dir_attr, new_dir_attr; + struct nfs3_renameargs arg = { NFS_FH(old_dir), + old_name->name, old_name->len, + NFS_FH(new_dir), + new_name->name, new_name->len }; + struct nfs3_renameres res = { &old_dir_attr, &new_dir_attr }; + int status; + + dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); + old_dir_attr.valid = 0; + new_dir_attr.valid = 0; + status = rpc_call(NFS_CLIENT(old_dir->d_inode), NFS3PROC_RENAME, &arg, &res, 0); + nfs_refresh_inode(old_dir->d_inode, &old_dir_attr); + nfs_refresh_inode(new_dir->d_inode, &new_dir_attr); + dprintk("NFS reply rename: %d\n", status); + return status; +} + +static int +nfs3_proc_link(struct dentry *dentry, struct dentry *dir, struct qstr *name) +{ + struct nfs_fattr dir_attr, fattr; + struct nfs3_linkargs arg = { NFS_FH(dentry), NFS_FH(dir), + name->name, name->len }; + struct nfs3_linkres res = { &dir_attr, &fattr }; + int status; + + dprintk("NFS call link %s\n", name->name); + dir_attr.valid = 0; + fattr.valid = 0; + status = rpc_call(NFS_CLIENT(dentry->d_inode), NFS3PROC_LINK, &arg, &res, 0); + nfs_refresh_inode(dir->d_inode, &dir_attr); + nfs_refresh_inode(dentry->d_inode, &fattr); + dprintk("NFS reply link: %d\n", status); + return status; +} + +static int +nfs3_proc_symlink(struct dentry *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 = { NFS_FH(dir), name->name, name->len, + path->name, path->len, sattr }; + struct nfs3_diropres res = { &dir_attr, fhandle, fattr }; + int status; + + dprintk("NFS call symlink %s -> %s\n", name->name, path->name); + dir_attr.valid = 0; + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_SYMLINK, &arg, &res, 0); + nfs_refresh_inode(dir->d_inode, &dir_attr); + dprintk("NFS reply symlink: %d\n", status); + return status; +} + +static int +nfs3_proc_mkdir(struct dentry *dir, struct qstr *name, struct iattr *sattr, + struct nfs_fh *fhandle, struct nfs_fattr *fattr) +{ + struct nfs_fattr dir_attr; + struct nfs3_createargs arg = { NFS_FH(dir), name->name, name->len, + sattr, 0, { 0, 0 } }; + struct nfs3_diropres res = { &dir_attr, fhandle, fattr }; + int status; + + dprintk("NFS call mkdir %s\n", name->name); + dir_attr.valid = 0; + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_MKDIR, &arg, &res, 0); + nfs_refresh_inode(dir->d_inode, &dir_attr); + dprintk("NFS reply mkdir: %d\n", status); + return status; +} + +static int +nfs3_proc_rmdir(struct dentry *dir, struct qstr *name) +{ + struct nfs_fattr dir_attr; + struct nfs3_diropargs arg = { NFS_FH(dir), name->name, name->len }; + int status; + + dprintk("NFS call rmdir %s\n", name->name); + dir_attr.valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_RMDIR, &arg, &dir_attr, 0); + nfs_refresh_inode(dir->d_inode, &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 *dir, u64 cookie, void *entry, + unsigned int size, int plus) +{ + struct nfs_fattr dir_attr; + struct nfs3_readdirargs arg = { NFS_FH(dir), cookie, {0, 0}, 0, 0, 0 }; + struct nfs3_readdirres res = { &dir_attr, 0, 0, 0, 0 }; + struct rpc_message msg = { NFS3PROC_READDIR, &arg, &res, NULL }; + u32 *verf = NFS_COOKIEVERF(dir->d_inode); + int status; + + arg.buffer = entry; + arg.bufsiz = size; + arg.verf[0] = verf[0]; + arg.verf[1] = verf[1]; + arg.plus = plus; + res.buffer = entry; + res.bufsiz = size; + res.verf = verf; + res.plus = plus; + + if (plus) + msg.rpc_proc = NFS3PROC_READDIRPLUS; + + dprintk("NFS call readdir%s %d\n", + plus? "plus" : "", (unsigned int) cookie); + + dir_attr.valid = 0; + status = rpc_call_sync(NFS_CLIENT(dir->d_inode), &msg, 0); + nfs_refresh_inode(dir->d_inode, &dir_attr); + dprintk("NFS reply readdir: %d\n", status); + return status; +} + +static int +nfs3_proc_mknod(struct dentry *dir, struct qstr *name, struct iattr *sattr, + dev_t rdev, struct nfs_fh *fh, struct nfs_fattr *fattr) +{ + struct nfs_fattr dir_attr; + struct nfs3_mknodargs arg = { NFS_FH(dir), name->name, name->len, 0, + sattr, rdev }; + struct nfs3_diropres res = { &dir_attr, fh, fattr }; + 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 %x\n", name->name, rdev); + dir_attr.valid = 0; + fattr->valid = 0; + status = rpc_call(NFS_CLIENT(dir->d_inode), NFS3PROC_MKNOD, &arg, &res, 0); + nfs_refresh_inode(dir->d_inode, &dir_attr); + dprintk("NFS reply mknod: %d\n", status); + return status; +} + +/* + * This is a combo call of fsstat and fsinfo + */ +static int +nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info) +{ + int status; + + dprintk("NFS call fsstat\n"); + memset((char *)info, 0, sizeof(*info)); + status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, info, 0); + if (status < 0) + goto error; + status = rpc_call(server->client, NFS3PROC_FSINFO, fhandle, info, 0); + +error: + dprintk("NFS reply statfs: %d\n", status); + return status; +} + +extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); + +struct nfs_rpc_ops nfs_v3_clientops = { + 3, /* protocol version */ + nfs3_proc_get_root, + nfs3_proc_getattr, + nfs3_proc_setattr, + nfs3_proc_lookup, + nfs3_proc_access, + nfs3_proc_readlink, + nfs3_proc_read, + nfs3_proc_write, + NULL, /* commit */ + nfs3_proc_create, + nfs3_proc_remove, + nfs3_proc_rename, + nfs3_proc_link, + nfs3_proc_symlink, + nfs3_proc_mkdir, + nfs3_proc_rmdir, + nfs3_proc_readdir, + nfs3_proc_mknod, + nfs3_proc_statfs, + nfs3_decode_dirent, +}; -- cgit v1.2.3