/*
* See comments for nfs_proc_create regarding failed operations.
*/
static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
struct iattr attr;
struct nfs_fattr fattr;
struct nfs_fh fhandle;
int error;
dfprintk(VFS, "NFS: mkdir(%x/%ld, %s\n",
dir->i_dev, dir->i_ino, dentry->d_name.name);
attr.ia_valid = ATTR_MODE;
attr.ia_mode = mode | S_IFDIR;
#if 0
/*
* Always drop the dentry, we can't always depend on
* the fattr returned by the server (AIX seems to be
* broken). We're better off doing another lookup than
* depending on potentially bogus information.
*/
d_drop(dentry);
#endif
nfs_zap_caches(dir);
error = NFS_PROTO(dir)->mkdir(dir, &dentry->d_name, &attr, &fhandle,
&fattr);
if (!error)
error = nfs_instantiate(dentry, &fhandle, &fattr);
else
d_drop(dentry);
return error;
}
/*
* Following a failed create operation, we drop the dentry rather
* than retain a negative dentry. This avoids a problem in the event
* that the operation succeeded on the server, but an error in the
* reply path made it appear to have failed.
*/
static int nfs_create(struct inode *dir, struct dentry *dentry, int mode)
{
struct iattr attr;
struct nfs_fattr fattr;
struct nfs_fh fhandle;
int error;
dfprintk(VFS, "NFS: create(%x/%ld, %s\n",
dir->i_dev, dir->i_ino, dentry->d_name.name);
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
/*
* The 0 argument passed into the create function should one day
* contain the O_EXCL flag if requested. This allows NFSv3 to
* select the appropriate create strategy. Currently open_namei
* does not pass the create flags.
*/
nfs_zap_caches(dir);
error = NFS_PROTO(dir)->create(dir, &dentry->d_name,
&attr, 0, &fhandle, &fattr);
if (!error)
error = nfs_instantiate(dentry, &fhandle, &fattr);
else
d_drop(dentry);
return error;
}
static int
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags, struct nfs_open_context *ctx)
{
struct nfs_createdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_CREATE],
};
int status = -ENOMEM;
;
data = nfs_alloc_createdata(dir, dentry, sattr);
if (data == NULL)
goto out;
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
nfs_free_createdata(data);
out:
;
return status;
}
static int
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags)
{
struct nfs_createdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_CREATE],
};
int status = -ENOMEM;
dprintk("NFS call create %s\n", dentry->d_name.name);
data = nfs_alloc_createdata(dir, dentry, sattr);
if (data == NULL)
goto out;
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
nfs_free_createdata(data);
out:
dprintk("NFS reply create: %d\n", status);
return status;
}
/*
* See comments for nfs_proc_create regarding failed operations.
*/
static int
nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
{
struct iattr attr;
struct nfs_fattr fattr;
struct nfs_fh fhandle;
int error;
dfprintk(VFS, "NFS: mknod(%s/%ld, %s\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name);
if (!new_valid_dev(rdev))
return -EINVAL;
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
lock_kernel();
nfs_begin_data_update(dir);
error = NFS_PROTO(dir)->mknod(dir, &dentry->d_name, &attr, rdev,
&fhandle, &fattr);
nfs_end_data_update(dir);
if (!error)
error = nfs_instantiate(dentry, &fhandle, &fattr);
else
d_drop(dentry);
unlock_kernel();
return error;
}
static int
nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
struct iattr attr;
struct nfs_fattr sym_attr;
struct nfs_fh sym_fh;
struct qstr qsymname;
int error;
dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s)\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name, symname);
error = -ENAMETOOLONG;
switch (NFS_PROTO(dir)->version) {
case 2:
if (strlen(symname) > NFS2_MAXPATHLEN)
goto out;
break;
case 3:
if (strlen(symname) > NFS3_MAXPATHLEN)
goto out;
default:
break;
}
#ifdef NFS_PARANOIA
if (dentry->d_inode)
printk("nfs_proc_symlink: %s/%s not negative!\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
#endif
/*
* Fill in the sattr for the call.
* Note: SunOS 4.1.2 crashes if the mode isn't initialized!
*/
attr.ia_valid = ATTR_MODE;
attr.ia_mode = S_IFLNK | S_IRWXUGO;
qsymname.name = symname;
qsymname.len = strlen(symname);
lock_kernel();
nfs_begin_data_update(dir);
error = NFS_PROTO(dir)->symlink(dir, &dentry->d_name, &qsymname,
&attr, &sym_fh, &sym_attr);
nfs_end_data_update(dir);
if (!error) {
error = nfs_instantiate(dentry, &sym_fh, &sym_attr);
} else {
if (error == -EEXIST)
printk("nfs_proc_symlink: %s/%s already exists??\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
d_drop(dentry);
}
unlock_kernel();
out:
return error;
}
static int
nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
struct iattr attr;
struct nfs_fattr sym_attr;
struct nfs_fh sym_fh;
struct qstr qsymname;
unsigned int maxlen;
int error;
dfprintk(VFS, "NFS: symlink(%x/%ld, %s, %s)\n",
dir->i_dev, dir->i_ino, dentry->d_name.name, symname);
error = -ENAMETOOLONG;
maxlen = (NFS_PROTO(dir)->version==2) ? NFS2_MAXPATHLEN : NFS3_MAXPATHLEN;
if (strlen(symname) > maxlen)
goto out;
#ifdef NFS_PARANOIA
if (dentry->d_inode)
printk("nfs_proc_symlink: %s/%s not negative!\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
#endif
/*
* Fill in the sattr for the call.
* Note: SunOS 4.1.2 crashes if the mode isn't initialized!
*/
attr.ia_valid = ATTR_MODE;
attr.ia_mode = S_IFLNK | S_IRWXUGO;
qsymname.name = symname;
qsymname.len = strlen(symname);
nfs_zap_caches(dir);
error = NFS_PROTO(dir)->symlink(dir, &dentry->d_name, &qsymname,
&attr, &sym_fh, &sym_attr);
if (!error) {
error = nfs_instantiate(dentry, &sym_fh, &sym_attr);
} else {
if (error == -EEXIST)
printk("nfs_proc_symlink: %s/%s already exists??\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
d_drop(dentry);
}
out:
return error;
}
/*
* 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_createdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_CREATE],
};
umode_t mode;
int status = -ENOMEM;
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 */
}
data = nfs_alloc_createdata(dir, dentry, sattr);
if (data == NULL)
goto out;
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == -EINVAL && S_ISFIFO(mode)) {
sattr->ia_mode = mode;
nfs_fattr_init(data->res.fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
}
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
nfs_free_createdata(data);
out:
dprintk("NFS reply mknod: %d\n", status);
return status;
}
/*
* See comments for nfs_proc_create regarding failed operations.
*/
static int nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
{
struct iattr attr;
struct nfs_fattr fattr;
struct nfs_fh fhandle;
int error;
dfprintk(VFS, "NFS: mknod(%x/%ld, %s\n",
dir->i_dev, dir->i_ino, dentry->d_name.name);
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
nfs_zap_caches(dir);
error = NFS_PROTO(dir)->mknod(dir, &dentry->d_name, &attr, rdev,
&fhandle, &fattr);
if (!error)
error = nfs_instantiate(dentry, &fhandle, &fattr);
else
d_drop(dentry);
return error;
}
static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
struct nfs_linkargs arg = {
.fromfh = NFS_FH(inode),
.tofh = NFS_FH(dir),
.toname = name->name,
.tolen = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_LINK],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call link %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_mark_for_revalidate(inode);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply link: %d\n", status);
return status;
}
static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
unsigned int len, struct iattr *sattr)
{
struct nfs_fh *fh;
struct nfs_fattr *fattr;
struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir),
.fromname = dentry->d_name.name,
.fromlen = dentry->d_name.len,
.pages = &page,
.pathlen = len,
.sattr = sattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
.rpc_argp = &arg,
};
int status = -ENAMETOOLONG;
dprintk("NFS call symlink %s\n", dentry->d_name.name);
if (len > NFS2_MAXPATHLEN)
goto out;
fh = nfs_alloc_fhandle();
fattr = nfs_alloc_fattr();
status = -ENOMEM;
if (fh == NULL || fattr == NULL)
goto out_free;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
/*
* V2 SYMLINK requests don't return any attributes. Setting the
* filehandle size to zero indicates to nfs_instantiate that it
* should fill in the data with a LOOKUP call on the wire.
*/
if (status == 0)
status = nfs_instantiate(dentry, fh, fattr, NULL);
out_free:
nfs_free_fattr(fattr);
nfs_free_fhandle(fh);
out:
dprintk("NFS reply symlink: %d\n", status);
return status;
}
static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
struct nfs_createdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
};
int status = -ENOMEM;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
data = nfs_alloc_createdata(dir, dentry, sattr);
if (data == NULL)
goto out;
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
nfs_free_createdata(data);
out:
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
struct nfs_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call rmdir %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
/*
* The READDIR implementation is somewhat hackish - we pass a temporary
* buffer to the encode function, which installs it in the receive
* the receive iovec. The decode function just parses the reply to make
* sure it is syntactically correct; the entries itself are decoded
* from nfs_readdir by calling the decode_entry function directly.
*/
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.count = count,
.pages = pages,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READDIR],
.rpc_argp = &arg,
.rpc_cred = cred,
};
int status;
dprintk("NFS call readdir %d\n", (unsigned int)cookie);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_invalidate_atime(dir);
dprintk("NFS reply readdir: %d\n", status);
return status;
}
static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsstat *stat)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call statfs\n");
nfs_fattr_init(stat->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
if (status)
goto out;
stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
stat->tfiles = 0;
stat->ffiles = 0;
stat->afiles = 0;
out:
return status;
}
static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
if (status)
goto out;
info->rtmax = NFS_MAXDATA;
info->rtpref = fsinfo.tsize;
info->rtmult = fsinfo.bsize;
info->wtmax = NFS_MAXDATA;
info->wtpref = fsinfo.tsize;
info->wtmult = fsinfo.bsize;
info->dtpref = fsinfo.tsize;
info->maxfilesize = 0x7FFFFFFF;
info->lease_time = 0;
out:
return status;
}
static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *info)
{
info->max_link = 0;
info->max_namelen = NFS2_MAXNAMLEN;
return 0;
}
static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
struct inode *inode = data->header->inode;
nfs_invalidate_atime(inode);
if (task->tk_status >= 0) {
nfs_refresh_inode(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->res.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 void nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
rpc_call_start(task);
}
static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->header->inode;
if (task->tk_status >= 0)
nfs_post_op_update_inode_force_wcc(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 int
nfs3_proc_lookup(struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr,
struct nfs4_label *label)
{
struct nfs3_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct nfs3_diropres res = {
.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);
res.dir_attr = nfs_alloc_fattr();
if (res.dir_attr == NULL)
return -ENOMEM;
nfs_fattr_init(fattr);
zql_control_test(NFS_SERVER(dir));
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_refresh_inode(dir, res.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);
}
nfs_free_fattr(res.dir_attr);
dprintk("NFS reply lookup: %d\n", status);
return status;
}
static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
struct nfs3_accessargs arg = {
.fh = NFS_FH(inode),
};
struct nfs3_accessres res;
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 = -ENOMEM;
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;
}
res.fattr = nfs_alloc_fattr();
if (res.fattr == NULL)
goto out;
zql_control_test(NFS_SERVER(inode));
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_refresh_inode(inode, res.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;
}
nfs_free_fattr(res.fattr);
out:
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,
};
int status = -ENOMEM;
dprintk("NFS call readlink\n");
fattr = nfs_alloc_fattr();
if (fattr == NULL)
goto out;
msg.rpc_resp = fattr;
zql_control_test(NFS_SERVER(inode));
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_refresh_inode(inode, fattr);
nfs_free_fattr(fattr);
out:
dprintk("NFS reply readlink: %d\n", status);
return status;
}
struct nfs3_createdata {
struct rpc_message msg;
union {
struct nfs3_createargs create;
struct nfs3_mkdirargs mkdir;
struct nfs3_symlinkargs symlink;
struct nfs3_mknodargs mknod;
} arg;
struct nfs3_diropres res;
struct nfs_fh fh;
struct nfs_fattr fattr;
struct nfs_fattr dir_attr;
};
static struct nfs3_createdata *nfs3_alloc_createdata(void)
{
struct nfs3_createdata *data;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data != NULL) {
data->msg.rpc_argp = &data->arg;
data->msg.rpc_resp = &data->res;
data->res.fh = &data->fh;
data->res.fattr = &data->fattr;
data->res.dir_attr = &data->dir_attr;
nfs_fattr_init(data->res.fattr);
nfs_fattr_init(data->res.dir_attr);
}
return data;
}
static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
{
int status;
status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
nfs_post_op_update_inode(dir, data->res.dir_attr);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
return status;
}
static void nfs3_free_createdata(struct nfs3_createdata *data)
{
kfree(data);
}
static int
nfs3_proc_lookup(struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs_fattr dir_attr;
struct nfs3_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct nfs3_diropres res = {
.dir_attr = &dir_attr,
.fh = fhandle,
.fattr = fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
dprintk("NFS call lookup %s\n", name->name);
nfs_fattr_init(&dir_attr);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
msg.rpc_argp = fhandle;
msg.rpc_resp = fattr;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
}
dprintk("NFS reply lookup: %d\n", status);
if (status >= 0)
status = nfs_refresh_inode(dir, &dir_attr);
return status;
}
static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
struct nfs_fattr fattr;
struct nfs3_accessargs arg = {
.fh = NFS_FH(inode),
};
struct nfs3_accessres res = {
.fattr = &fattr,
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = entry->cred,
};
int mode = entry->mask;
int status;
dprintk("NFS call access\n");
if (mode & MAY_READ)
arg.access |= NFS3_ACCESS_READ;
if (S_ISDIR(inode->i_mode)) {
if (mode & MAY_WRITE)
arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
if (mode & MAY_EXEC)
arg.access |= NFS3_ACCESS_LOOKUP;
} else {
if (mode & MAY_WRITE)
arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
if (mode & MAY_EXEC)
arg.access |= NFS3_ACCESS_EXECUTE;
}
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_refresh_inode(inode, &fattr);
if (status == 0) {
entry->mask = 0;
if (res.access & NFS3_ACCESS_READ)
entry->mask |= MAY_READ;
if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
entry->mask |= MAY_WRITE;
if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
entry->mask |= MAY_EXEC;
}
dprintk("NFS reply access: %d\n", status);
return status;
}
static int nfs3_proc_readlink(struct inode *inode, struct page *page,
unsigned int pgbase, unsigned int pglen)
{
struct nfs_fattr fattr;
struct nfs3_readlinkargs args = {
.fh = NFS_FH(inode),
.pgbase = pgbase,
.pglen = pglen,
.pages = &page
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
.rpc_argp = &args,
.rpc_resp = &fattr,
};
int status;
dprintk("NFS call readlink\n");
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_refresh_inode(inode, &fattr);
dprintk("NFS reply readlink: %d\n", status);
return status;
}
static int nfs3_proc_read(struct nfs_read_data *rdata)
{
int flags = rdata->flags;
struct inode * inode = rdata->inode;
struct nfs_fattr * fattr = rdata->res.fattr;
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_READ],
.rpc_argp = &rdata->args,
.rpc_resp = &rdata->res,
.rpc_cred = rdata->cred,
};
int status;
dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
(long long) rdata->args.offset);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
if (status >= 0)
nfs_refresh_inode(inode, fattr);
dprintk("NFS reply read: %d\n", status);
return status;
}
static int nfs3_proc_write(struct nfs_write_data *wdata)
{
int rpcflags = wdata->flags;
struct inode * inode = wdata->inode;
struct nfs_fattr * fattr = wdata->res.fattr;
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_WRITE],
.rpc_argp = &wdata->args,
.rpc_resp = &wdata->res,
.rpc_cred = wdata->cred,
};
int status;
dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
(long long) wdata->args.offset);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags);
if (status >= 0)
nfs_post_op_update_inode(inode, fattr);
dprintk("NFS reply write: %d\n", status);
return status < 0? status : wdata->res.count;
}
static int nfs3_proc_commit(struct nfs_write_data *cdata)
{
struct inode * inode = cdata->inode;
struct nfs_fattr * fattr = cdata->res.fattr;
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT],
.rpc_argp = &cdata->args,
.rpc_resp = &cdata->res,
.rpc_cred = cdata->cred,
};
int status;
dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
(long long) cdata->args.offset);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
if (status >= 0)
nfs_post_op_update_inode(inode, fattr);
dprintk("NFS reply commit: %d\n", status);
return status;
}
/*
* Create a regular file.
* For now, we don't implement O_EXCL.
*/
static int
nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags, struct nameidata *nd)
{
struct nfs_fh fhandle;
struct nfs_fattr fattr;
struct nfs_fattr dir_attr;
struct nfs3_createargs arg = {
.fh = NFS_FH(dir),
.name = dentry->d_name.name,
.len = dentry->d_name.len,
.sattr = sattr,
};
struct nfs3_diropres res = {
.dir_attr = &dir_attr,
.fh = &fhandle,
.fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE],
.rpc_argp = &arg,
.rpc_resp = &res,
};
mode_t mode = sattr->ia_mode;
int status;
dprintk("NFS call create %s\n", dentry->d_name.name);
arg.createmode = NFS3_CREATE_UNCHECKED;
if (flags & O_EXCL) {
arg.createmode = NFS3_CREATE_EXCLUSIVE;
arg.verifier[0] = jiffies;
arg.verifier[1] = current->pid;
}
sattr->ia_mode &= ~current->fs->umask;
again:
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_refresh_inode(dir, &dir_attr);
/* If the server doesn't support the exclusive creation semantics,
* try again with simple 'guarded' mode. */
if (status == NFSERR_NOTSUPP) {
switch (arg.createmode) {
case NFS3_CREATE_EXCLUSIVE:
arg.createmode = NFS3_CREATE_GUARDED;
break;
case NFS3_CREATE_GUARDED:
arg.createmode = NFS3_CREATE_UNCHECKED;
break;
case NFS3_CREATE_UNCHECKED:
goto out;
}
goto again;
}
if (status == 0)
status = nfs_instantiate(dentry, &fhandle, &fattr);
if (status != 0)
goto out;
/* When we created the file with exclusive semantics, make
* sure we set the attributes afterwards. */
if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
dprintk("NFS call setattr (post-create)\n");
if (!(sattr->ia_valid & ATTR_ATIME_SET))
sattr->ia_valid |= ATTR_ATIME;
if (!(sattr->ia_valid & ATTR_MTIME_SET))
sattr->ia_valid |= ATTR_MTIME;
/* Note: we could use a guarded setattr here, but I'm
* not sure this buys us anything (and I'd have
* to revamp the NFSv3 XDR code) */
status = nfs3_proc_setattr(dentry, &fattr, sattr);
if (status == 0)
nfs_setattr_update_inode(dentry->d_inode, sattr);
nfs_refresh_inode(dentry->d_inode, &fattr);
dprintk("NFS reply setattr (post-create): %d\n", status);
}
if (status != 0)
goto out;
status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
dprintk("NFS reply create: %d\n", status);
return status;
}
static int
nfs3_proc_remove(struct inode *dir, struct qstr *name)
{
struct nfs_fattr dir_attr;
struct nfs3_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
.rpc_argp = &arg,
.rpc_resp = &dir_attr,
};
int status;
dprintk("NFS call remove %s\n", name->name);
nfs_fattr_init(&dir_attr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
dprintk("NFS reply remove: %d\n", status);
return status;
}
static int
nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
{
struct unlinkxdr {
struct nfs3_diropargs arg;
struct nfs_fattr res;
} *ptr;
ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return -ENOMEM;
ptr->arg.fh = NFS_FH(dir->d_inode);
ptr->arg.name = name->name;
ptr->arg.len = name->len;
nfs_fattr_init(&ptr->res);
msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
msg->rpc_argp = &ptr->arg;
msg->rpc_resp = &ptr->res;
return 0;
}
static int
nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
{
struct rpc_message *msg = &task->tk_msg;
struct nfs_fattr *dir_attr;
if (nfs3_async_handle_jukebox(task, dir->d_inode))
return 1;
if (msg->rpc_argp) {
dir_attr = (struct nfs_fattr*)msg->rpc_resp;
nfs_post_op_update_inode(dir->d_inode, dir_attr);
kfree(msg->rpc_argp);
}
return 0;
}
static int
nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_fattr old_dir_attr, new_dir_attr;
struct nfs3_renameargs arg = {
.fromfh = NFS_FH(old_dir),
.fromname = old_name->name,
.fromlen = old_name->len,
.tofh = NFS_FH(new_dir),
.toname = new_name->name,
.tolen = new_name->len
};
struct nfs3_renameres res = {
.fromattr = &old_dir_attr,
.toattr = &new_dir_attr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
nfs_fattr_init(&old_dir_attr);
nfs_fattr_init(&new_dir_attr);
status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
nfs_post_op_update_inode(old_dir, &old_dir_attr);
nfs_post_op_update_inode(new_dir, &new_dir_attr);
dprintk("NFS reply rename: %d\n", status);
return status;
}
static int
nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
struct nfs_fattr dir_attr, fattr;
struct nfs3_linkargs arg = {
.fromfh = NFS_FH(inode),
.tofh = NFS_FH(dir),
.toname = name->name,
.tolen = name->len
};
struct nfs3_linkres res = {
.dir_attr = &dir_attr,
.fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
dprintk("NFS call link %s\n", name->name);
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
nfs_post_op_update_inode(inode, &fattr);
dprintk("NFS reply link: %d\n", status);
return status;
}
static int
nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
struct iattr *sattr, struct nfs_fh *fhandle,
struct nfs_fattr *fattr)
{
struct nfs_fattr dir_attr;
struct nfs3_symlinkargs arg = {
.fromfh = NFS_FH(dir),
.fromname = name->name,
.fromlen = name->len,
.topath = path->name,
.tolen = path->len,
.sattr = sattr
};
struct nfs3_diropres res = {
.dir_attr = &dir_attr,
.fh = fhandle,
.fattr = fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
if (path->len > NFS3_MAXPATHLEN)
return -ENAMETOOLONG;
dprintk("NFS call symlink %s -> %s\n", name->name, path->name);
nfs_fattr_init(&dir_attr);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
dprintk("NFS reply symlink: %d\n", status);
return status;
}
static int
nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
struct nfs_fh fhandle;
struct nfs_fattr fattr, dir_attr;
struct nfs3_mkdirargs arg = {
.fh = NFS_FH(dir),
.name = dentry->d_name.name,
.len = dentry->d_name.len,
.sattr = sattr
};
struct nfs3_diropres res = {
.dir_attr = &dir_attr,
.fh = &fhandle,
.fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int mode = sattr->ia_mode;
int status;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
sattr->ia_mode &= ~current->fs->umask;
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
if (status != 0)
goto out;
status = nfs_instantiate(dentry, &fhandle, &fattr);
if (status != 0)
goto out;
status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
static int
nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
{
struct nfs_fattr dir_attr;
struct nfs3_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
.rpc_argp = &arg,
.rpc_resp = &dir_attr,
};
int status;
dprintk("NFS call rmdir %s\n", name->name);
nfs_fattr_init(&dir_attr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
/*
* The READDIR implementation is somewhat hackish - we pass the user buffer
* to the encode function, which installs it in the receive iovec.
* The decode function itself doesn't perform any decoding, it just makes
* sure the reply is syntactically correct.
*
* Also note that this implementation handles both plain readdir and
* readdirplus.
*/
static int
nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page *page, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs_fattr dir_attr;
u32 *verf = NFS_COOKIEVERF(dir);
struct nfs3_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.verf = {verf[0], verf[1]},
.plus = plus,
.count = count,
.pages = &page
};
struct nfs3_readdirres res = {
.dir_attr = &dir_attr,
.verf = verf,
.plus = plus
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = cred
};
int status;
lock_kernel();
if (plus)
msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
dprintk("NFS call readdir%s %d\n",
plus? "plus" : "", (unsigned int) cookie);
nfs_fattr_init(&dir_attr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_refresh_inode(dir, &dir_attr);
dprintk("NFS reply readdir: %d\n", status);
unlock_kernel();
return status;
}
static int
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
dev_t rdev)
{
struct nfs_fh fh;
struct nfs_fattr fattr, dir_attr;
struct nfs3_mknodargs arg = {
.fh = NFS_FH(dir),
.name = dentry->d_name.name,
.len = dentry->d_name.len,
.sattr = sattr,
.rdev = rdev
};
struct nfs3_diropres res = {
.dir_attr = &dir_attr,
.fh = &fh,
.fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD],
.rpc_argp = &arg,
.rpc_resp = &res,
};
mode_t mode = sattr->ia_mode;
int status;
switch (sattr->ia_mode & S_IFMT) {
case S_IFBLK: arg.type = NF3BLK; break;
case S_IFCHR: arg.type = NF3CHR; break;
case S_IFIFO: arg.type = NF3FIFO; break;
case S_IFSOCK: arg.type = NF3SOCK; break;
default: return -EINVAL;
}
dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
MAJOR(rdev), MINOR(rdev));
sattr->ia_mode &= ~current->fs->umask;
nfs_fattr_init(&dir_attr);
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
if (status != 0)
goto out;
status = nfs_instantiate(dentry, &fh, &fattr);
if (status != 0)
goto out;
status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
dprintk("NFS reply mknod: %d\n", status);
return status;
}
static int
nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsstat *stat)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
.rpc_argp = fhandle,
.rpc_resp = stat,
};
int status;
dprintk("NFS call fsstat\n");
nfs_fattr_init(stat->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
return status;
}
static int
nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
.rpc_argp = fhandle,
.rpc_resp = info,
};
int status;
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
status = rpc_call_sync(server->client_sys, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
return status;
}
static int
nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *info)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
.rpc_argp = fhandle,
.rpc_resp = info,
};
int status;
dprintk("NFS call pathconf\n");
nfs_fattr_init(info->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply pathconf: %d\n", status);
return status;
}
static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
if (nfs3_async_handle_jukebox(task, data->inode))
return -EAGAIN;
/* Call back common NFS readpage processing */
if (task->tk_status >= 0)
nfs_refresh_inode(data->inode, &data->fattr);
return 0;
}
static void nfs3_proc_read_setup(struct nfs_read_data *data)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_READ],
.rpc_argp = &data->args,
.rpc_resp = &data->res,
.rpc_cred = data->cred,
};
rpc_call_setup(&data->task, &msg, 0);
}
static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
if (nfs3_async_handle_jukebox(task, data->inode))
return -EAGAIN;
if (task->tk_status >= 0)
nfs_post_op_update_inode(data->inode, data->res.fattr);
return 0;
}
static void nfs3_proc_write_setup(struct nfs_write_data *data, int how)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_WRITE],
.rpc_argp = &data->args,
.rpc_resp = &data->res,
.rpc_cred = data->cred,
};
data->args.stable = NFS_UNSTABLE;
if (how & FLUSH_STABLE) {
data->args.stable = NFS_FILE_SYNC;
if (NFS_I(data->inode)->ncommit)
data->args.stable = NFS_DATA_SYNC;
}
/* Finalize the task. */
rpc_call_setup(&data->task, &msg, 0);
}
static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
{
if (nfs3_async_handle_jukebox(task, data->inode))
return -EAGAIN;
if (task->tk_status >= 0)
nfs_post_op_update_inode(data->inode, data->res.fattr);
return 0;
}
static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT],
.rpc_argp = &data->args,
.rpc_resp = &data->res,
.rpc_cred = data->cred,
};
rpc_call_setup(&data->task, &msg, 0);
}
static int
nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
}
struct nfs_rpc_ops nfs_v3_clientops = {
.version = 3, /* protocol version */
.dentry_ops = &nfs_dentry_operations,
.dir_inode_ops = &nfs3_dir_inode_operations,
.file_inode_ops = &nfs3_file_inode_operations,
.getroot = nfs3_proc_get_root,
.getattr = nfs3_proc_getattr,
.setattr = nfs3_proc_setattr,
.lookup = nfs3_proc_lookup,
.access = nfs3_proc_access,
.readlink = nfs3_proc_readlink,
.read = nfs3_proc_read,
.write = nfs3_proc_write,
.commit = nfs3_proc_commit,
.create = nfs3_proc_create,
.remove = nfs3_proc_remove,
.unlink_setup = nfs3_proc_unlink_setup,
.unlink_done = nfs3_proc_unlink_done,
.rename = nfs3_proc_rename,
.link = nfs3_proc_link,
.symlink = nfs3_proc_symlink,
.mkdir = nfs3_proc_mkdir,
.rmdir = nfs3_proc_rmdir,
.readdir = nfs3_proc_readdir,
.mknod = nfs3_proc_mknod,
.statfs = nfs3_proc_statfs,
.fsinfo = nfs3_proc_fsinfo,
.pathconf = nfs3_proc_pathconf,
.decode_dirent = nfs3_decode_dirent,
.read_setup = nfs3_proc_read_setup,
.read_done = nfs3_read_done,
.write_setup = nfs3_proc_write_setup,
.write_done = nfs3_write_done,
.commit_setup = nfs3_proc_commit_setup,
.commit_done = nfs3_commit_done,
.file_open = nfs_open,
.file_release = nfs_release,
.lock = nfs3_proc_lock,
.clear_acl_cache = nfs3_forget_cached_acls,
};
static int
nfs_proc_remove(struct inode *dir, struct qstr *name)
{
struct nfs_removeargs arg = {
.fh = NFS_FH(dir),
.name.len = name->len,
.name.name = name->name,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call remove %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply remove: %d\n", status);
return status;
}
static void
nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
{
msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
}
static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
if (nfs_async_handle_expired_key(task))
return 0;
nfs_mark_for_revalidate(dir);
return 1;
}
static void
nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
{
msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
}
static int
nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
struct inode *new_dir)
{
if (nfs_async_handle_expired_key(task))
return 0;
nfs_mark_for_revalidate(old_dir);
nfs_mark_for_revalidate(new_dir);
return 1;
}
static int
nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_renameargs arg = {
.old_dir = NFS_FH(old_dir),
.old_name = old_name,
.new_dir = NFS_FH(new_dir),
.new_name = new_name,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_RENAME],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
nfs_mark_for_revalidate(old_dir);
nfs_mark_for_revalidate(new_dir);
dprintk("NFS reply rename: %d\n", status);
return status;
}
static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
struct nfs_linkargs arg = {
.fromfh = NFS_FH(inode),
.tofh = NFS_FH(dir),
.toname = name->name,
.tolen = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_LINK],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call link %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_mark_for_revalidate(inode);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply link: %d\n", status);
return status;
}
static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
unsigned int len, struct iattr *sattr)
{
struct nfs_fh *fh;
struct nfs_fattr *fattr;
struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir),
.fromname = dentry->d_name.name,
.fromlen = dentry->d_name.len,
.pages = &page,
.pathlen = len,
.sattr = sattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
.rpc_argp = &arg,
};
int status = -ENAMETOOLONG;
dprintk("NFS call symlink %s\n", dentry->d_name.name);
if (len > NFS2_MAXPATHLEN)
goto out;
fh = nfs_alloc_fhandle();
fattr = nfs_alloc_fattr();
status = -ENOMEM;
if (fh == NULL || fattr == NULL)
goto out_free;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
/*
* V2 SYMLINK requests don't return any attributes. Setting the
* filehandle size to zero indicates to nfs_instantiate that it
* should fill in the data with a LOOKUP call on the wire.
*/
if (status == 0)
status = nfs_instantiate(dentry, fh, fattr);
out_free:
nfs_free_fattr(fattr);
nfs_free_fhandle(fh);
out:
dprintk("NFS reply symlink: %d\n", status);
return status;
}
static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
struct nfs_createdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
};
int status = -ENOMEM;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
data = nfs_alloc_createdata(dir, dentry, sattr);
if (data == NULL)
goto out;
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
nfs_free_createdata(data);
out:
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
struct nfs_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call rmdir %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
/*
* The READDIR implementation is somewhat hackish - we pass a temporary
* buffer to the encode function, which installs it in the receive
* the receive iovec. The decode function just parses the reply to make
* sure it is syntactically correct; the entries itself are decoded
* from nfs_readdir by calling the decode_entry function directly.
*/
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.count = count,
.pages = pages,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READDIR],
.rpc_argp = &arg,
.rpc_cred = cred,
};
int status;
dprintk("NFS call readdir %d\n", (unsigned int)cookie);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_invalidate_atime(dir);
dprintk("NFS reply readdir: %d\n", status);
return status;
}
static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsstat *stat)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call statfs\n");
nfs_fattr_init(stat->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
if (status)
goto out;
stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
stat->tfiles = 0;
stat->ffiles = 0;
stat->afiles = 0;
out:
return status;
}
static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
if (status)
goto out;
info->rtmax = NFS_MAXDATA;
info->rtpref = fsinfo.tsize;
info->rtmult = fsinfo.bsize;
info->wtmax = NFS_MAXDATA;
info->wtpref = fsinfo.tsize;
info->wtmult = fsinfo.bsize;
info->dtpref = fsinfo.tsize;
info->maxfilesize = 0x7FFFFFFF;
info->lease_time = 0;
out:
return status;
}
static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *info)
{
info->max_link = 0;
info->max_namelen = NFS2_MAXNAMLEN;
return 0;
}
static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
if (nfs_async_handle_expired_key(task))
return -EAGAIN;
nfs_invalidate_atime(data->inode);
if (task->tk_status >= 0) {
nfs_refresh_inode(data->inode, data->res.fattr);
/* Emulate the eof flag, which isn't normally needed in NFSv2
* as it is guaranteed to always return the file attributes
*/
if (data->args.offset + data->args.count >= data->res.fattr->size)
data->res.eof = 1;
}
return 0;
}
static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
}
static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
if (nfs_async_handle_expired_key(task))
return -EAGAIN;
if (task->tk_status >= 0)
nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
return 0;
}
static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
data->args.stable = NFS_FILE_SYNC;
msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
}
static void
nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
BUG();
}
static int
nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
struct inode *inode = filp->f_path.dentry->d_inode;
return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
}
/* Helper functions for NFS lock bounds checking */
#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
static int nfs_lock_check_bounds(const struct file_lock *fl)
{
__s32 start, end;
start = (__s32)fl->fl_start;
if ((loff_t)start != fl->fl_start)
goto out_einval;
if (fl->fl_end != OFFSET_MAX) {
end = (__s32)fl->fl_end;
if ((loff_t)end != fl->fl_end)
goto out_einval;
} else
end = NFS_LOCK32_OFFSET_MAX;
if (start < 0 || start > end)
goto out_einval;
return 0;
out_einval:
return -EINVAL;
}
const struct nfs_rpc_ops nfs_v2_clientops = {
.version = 2, /* protocol version */
.dentry_ops = &nfs_dentry_operations,
.dir_inode_ops = &nfs_dir_inode_operations,
.file_inode_ops = &nfs_file_inode_operations,
.getroot = nfs_proc_get_root,
.getattr = nfs_proc_getattr,
.setattr = nfs_proc_setattr,
.lookup = nfs_proc_lookup,
.access = NULL, /* access */
.readlink = nfs_proc_readlink,
.create = nfs_proc_create,
.remove = nfs_proc_remove,
.unlink_setup = nfs_proc_unlink_setup,
.unlink_done = nfs_proc_unlink_done,
.rename = nfs_proc_rename,
.rename_setup = nfs_proc_rename_setup,
.rename_done = nfs_proc_rename_done,
.link = nfs_proc_link,
.symlink = nfs_proc_symlink,
.mkdir = nfs_proc_mkdir,
.rmdir = nfs_proc_rmdir,
.readdir = nfs_proc_readdir,
.mknod = nfs_proc_mknod,
.statfs = nfs_proc_statfs,
.fsinfo = nfs_proc_fsinfo,
.pathconf = nfs_proc_pathconf,
.decode_dirent = nfs2_decode_dirent,
.read_setup = nfs_proc_read_setup,
.read_done = nfs_read_done,
.write_setup = nfs_proc_write_setup,
.write_done = nfs_write_done,
.commit_setup = nfs_proc_commit_setup,
.lock = nfs_proc_lock,
.lock_check_bounds = nfs_lock_check_bounds,
.close_context = nfs_close_context,
.init_client = nfs_init_client,
};
static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
struct nfs_linkargs arg = {
.fromfh = NFS_FH(inode),
.tofh = NFS_FH(dir),
.toname = name->name,
.tolen = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_LINK],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call link %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_mark_for_revalidate(inode);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply link: %d\n", status);
return status;
}
static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
unsigned int len, struct iattr *sattr)
{
struct nfs_fh *fh;
struct nfs_fattr *fattr;
struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir),
.fromname = dentry->d_name.name,
.fromlen = dentry->d_name.len,
.pages = &page,
.pathlen = len,
.sattr = sattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
.rpc_argp = &arg,
};
int status = -ENAMETOOLONG;
dprintk("NFS call symlink %s\n", dentry->d_name.name);
if (len > NFS2_MAXPATHLEN)
goto out;
fh = nfs_alloc_fhandle();
fattr = nfs_alloc_fattr();
status = -ENOMEM;
if (fh == NULL || fattr == NULL)
goto out_free;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
/*
*/
if (status == 0)
status = nfs_instantiate(dentry, fh, fattr);
out_free:
nfs_free_fattr(fattr);
nfs_free_fhandle(fh);
out:
dprintk("NFS reply symlink: %d\n", status);
return status;
}
static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
struct nfs_createdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
};
int status = -ENOMEM;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
data = nfs_alloc_createdata(dir, dentry, sattr);
if (data == NULL)
goto out;
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
nfs_free_createdata(data);
out:
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
struct nfs_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call rmdir %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
/*
*/
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.count = count,
.pages = pages,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READDIR],
.rpc_argp = &arg,
.rpc_cred = cred,
};
int status;
dprintk("NFS call readdir %d\n", (unsigned int)cookie);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_invalidate_atime(dir);
dprintk("NFS reply readdir: %d\n", status);
return status;
}
static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsstat *stat)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call statfs\n");
nfs_fattr_init(stat->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
if (status)
goto out;
stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
stat->tfiles = 0;
stat->ffiles = 0;
stat->afiles = 0;
out:
return status;
}
static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
if (status)
goto out;
info->rtmax = NFS_MAXDATA;
info->rtpref = fsinfo.tsize;
info->rtmult = fsinfo.bsize;
info->wtmax = NFS_MAXDATA;
info->wtpref = fsinfo.tsize;
info->wtmult = fsinfo.bsize;
info->dtpref = fsinfo.tsize;
info->maxfilesize = 0x7FFFFFFF;
info->lease_time = 0;
out:
return status;
}
static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *info)
{
info->max_link = 0;
info->max_namelen = NFS2_MAXNAMLEN;
return 0;
}
static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
if (nfs_async_handle_expired_key(task))
return -EAGAIN;
nfs_invalidate_atime(data->inode);
if (task->tk_status >= 0) {
nfs_refresh_inode(data->inode, data->res.fattr);
/*
*/
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 void nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
rpc_call_start(task);
}
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)
{
/* */
data->args.stable = NFS_FILE_SYNC;
msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
}
static int
nfs_proc_lookup(struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct nfs_diropok res = {
.fh = fhandle,
.fattr = fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
dprintk("NFS call lookup %s\n", name->name);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
dprintk("NFS reply lookup: %d\n", status);
return status;
}
static int nfs_proc_readlink(struct inode *inode, struct page *page,
unsigned int pgbase, unsigned int pglen)
{
struct nfs_readlinkargs args = {
.fh = NFS_FH(inode),
.pgbase = pgbase,
.pglen = pglen,
.pages = &page
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READLINK],
.rpc_argp = &args,
};
int status;
dprintk("NFS call readlink\n");
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
dprintk("NFS reply readlink: %d\n", status);
return status;
}
static int nfs_proc_read(struct nfs_read_data *rdata)
{
int flags = rdata->flags;
struct inode * inode = rdata->inode;
struct nfs_fattr * fattr = rdata->res.fattr;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READ],
.rpc_argp = &rdata->args,
.rpc_resp = &rdata->res,
.rpc_cred = rdata->cred,
};
int status;
dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
(long long) rdata->args.offset);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
if (status >= 0) {
nfs_refresh_inode(inode, fattr);
/* Emulate the eof flag, which isn't normally needed in NFSv2
* as it is guaranteed to always return the file attributes
*/
if (rdata->args.offset + rdata->args.count >= fattr->size)
rdata->res.eof = 1;
}
dprintk("NFS reply read: %d\n", status);
return status;
}
static int nfs_proc_write(struct nfs_write_data *wdata)
{
int flags = wdata->flags;
struct inode * inode = wdata->inode;
struct nfs_fattr * fattr = wdata->res.fattr;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_WRITE],
.rpc_argp = &wdata->args,
.rpc_resp = &wdata->res,
.rpc_cred = wdata->cred,
};
int status;
dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
(long long) wdata->args.offset);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
if (status >= 0) {
nfs_post_op_update_inode(inode, fattr);
wdata->res.count = wdata->args.count;
wdata->verf.committed = NFS_FILE_SYNC;
}
dprintk("NFS reply write: %d\n", status);
return status < 0? status : wdata->res.count;
}
static int
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags, struct nameidata *nd)
{
struct nfs_fh fhandle;
struct nfs_fattr fattr;
struct nfs_createargs arg = {
.fh = NFS_FH(dir),
.name = dentry->d_name.name,
.len = dentry->d_name.len,
.sattr = sattr
};
struct nfs_diropok res = {
.fh = &fhandle,
.fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_CREATE],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
nfs_fattr_init(&fattr);
dprintk("NFS call create %s\n", dentry->d_name.name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
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_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
.rpc_argp = &arg,
};
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 int
nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
{
struct nfs_diropargs *arg;
arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL);
if (!arg)
return -ENOMEM;
arg->fh = NFS_FH(dir->d_inode);
arg->name = name->name;
arg->len = name->len;
msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
msg->rpc_argp = arg;
return 0;
}
static int
nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
{
struct rpc_message *msg = &task->tk_msg;
if (msg->rpc_argp) {
nfs_mark_for_revalidate(dir->d_inode);
kfree(msg->rpc_argp);
}
return 0;
}
static int
nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_renameargs arg = {
.fromfh = NFS_FH(old_dir),
.fromname = old_name->name,
.fromlen = old_name->len,
.tofh = NFS_FH(new_dir),
.toname = new_name->name,
.tolen = new_name->len
};
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 qstr *name, struct qstr *path,
struct iattr *sattr, struct nfs_fh *fhandle,
struct nfs_fattr *fattr)
{
struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir),
.fromname = name->name,
.fromlen = name->len,
.topath = path->name,
.tolen = path->len,
.sattr = sattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
.rpc_argp = &arg,
};
int status;
if (path->len > NFS2_MAXPATHLEN)
return -ENAMETOOLONG;
dprintk("NFS call symlink %s -> %s\n", name->name, path->name);
nfs_fattr_init(fattr);
fhandle->size = 0;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply symlink: %d\n", status);
return status;
}
static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
struct nfs_fh fhandle;
struct nfs_fattr fattr;
struct nfs_createargs arg = {
.fh = NFS_FH(dir),
.name = dentry->d_name.name,
.len = dentry->d_name.len,
.sattr = sattr
};
struct nfs_diropok res = {
.fh = &fhandle,
.fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, &fhandle, &fattr);
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
struct nfs_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
.rpc_argp = &arg,
};
int status;
dprintk("NFS call rmdir %s\n", name->name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
dprintk("NFS reply rmdir: %d\n", status);
return status;
}
/*
* The READDIR implementation is somewhat hackish - we pass a temporary
* buffer to the encode function, which installs it in the receive
* the receive iovec. The decode function just parses the reply to make
* sure it is syntactically correct; the entries itself are decoded
* from nfs_readdir by calling the decode_entry function directly.
*/
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page *page, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.count = count,
.pages = &page,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READDIR],
.rpc_argp = &arg,
.rpc_cred = cred,
};
int status;
lock_kernel();
dprintk("NFS call readdir %d\n", (unsigned int)cookie);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
dprintk("NFS reply readdir: %d\n", status);
unlock_kernel();
return status;
}
static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsstat *stat)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call statfs\n");
nfs_fattr_init(stat->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
if (status)
goto out;
stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
stat->tfiles = 0;
stat->ffiles = 0;
stat->afiles = 0;
out:
return status;
}
static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct nfs2_fsstat fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
.rpc_argp = fhandle,
.rpc_resp = &fsinfo,
};
int status;
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
if (status)
goto out;
info->rtmax = NFS_MAXDATA;
info->rtpref = fsinfo.tsize;
info->rtmult = fsinfo.bsize;
info->wtmax = NFS_MAXDATA;
info->wtpref = fsinfo.tsize;
info->wtmult = fsinfo.bsize;
info->dtpref = fsinfo.tsize;
info->maxfilesize = 0x7FFFFFFF;
info->lease_time = 0;
out:
return status;
}
static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *info)
{
info->max_link = 0;
info->max_namelen = NFS2_MAXNAMLEN;
return 0;
}
static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
if (task->tk_status >= 0) {
nfs_refresh_inode(data->inode, data->res.fattr);
/* Emulate the eof flag, which isn't normally needed in NFSv2
* as it is guaranteed to always return the file attributes
*/
if (data->args.offset + data->args.count >= data->res.fattr->size)
data->res.eof = 1;
}
return 0;
}
static void nfs_proc_read_setup(struct nfs_read_data *data)
{
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READ],
.rpc_argp = &data->args,
.rpc_resp = &data->res,
.rpc_cred = data->cred,
};
rpc_call_setup(&data->task, &msg, 0);
}
static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
if (task->tk_status >= 0)
nfs_post_op_update_inode(data->inode, data->res.fattr);
return 0;
}
static void nfs_proc_write_setup(struct nfs_write_data *data, int how)
{
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_WRITE],
.rpc_argp = &data->args,
.rpc_resp = &data->res,
.rpc_cred = data->cred,
};
/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
data->args.stable = NFS_FILE_SYNC;
/* Finalize the task. */
rpc_call_setup(&data->task, &msg, 0);
}
static void
nfs_proc_commit_setup(struct nfs_write_data *data, int how)
{
BUG();
}
static int
nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
}
struct nfs_rpc_ops nfs_v2_clientops = {
.version = 2, /* protocol version */
.dentry_ops = &nfs_dentry_operations,
.dir_inode_ops = &nfs_dir_inode_operations,
.file_inode_ops = &nfs_file_inode_operations,
.getroot = nfs_proc_get_root,
.getattr = nfs_proc_getattr,
.setattr = nfs_proc_setattr,
.lookup = nfs_proc_lookup,
.access = NULL, /* access */
.readlink = nfs_proc_readlink,
.read = nfs_proc_read,
.write = nfs_proc_write,
.commit = NULL, /* commit */
.create = nfs_proc_create,
.remove = nfs_proc_remove,
.unlink_setup = nfs_proc_unlink_setup,
.unlink_done = nfs_proc_unlink_done,
.rename = nfs_proc_rename,
.link = nfs_proc_link,
.symlink = nfs_proc_symlink,
.mkdir = nfs_proc_mkdir,
.rmdir = nfs_proc_rmdir,
.readdir = nfs_proc_readdir,
.mknod = nfs_proc_mknod,
.statfs = nfs_proc_statfs,
.fsinfo = nfs_proc_fsinfo,
.pathconf = nfs_proc_pathconf,
.decode_dirent = nfs_decode_dirent,
.read_setup = nfs_proc_read_setup,
.read_done = nfs_read_done,
.write_setup = nfs_proc_write_setup,
.write_done = nfs_write_done,
.commit_setup = nfs_proc_commit_setup,
.file_open = nfs_open,
.file_release = nfs_release,
.lock = nfs_proc_lock,
};
