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Split new NFS proxy implementation into multiple files

master
Vitaliy Filippov 2024-01-27 16:48:51 +03:00
parent 8cdc38805b
commit 181795d748
16 changed files with 2634 additions and 2475 deletions
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14
src/CMakeLists.txt
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@ -213,7 +213,19 @@ target_link_libraries(vitastor-kv-stress
# vitastor-nfs
add_executable(vitastor-nfs
nfs_proxy.cpp
nfs_conn.cpp
nfs_kv.cpp
nfs_kv_create.cpp
nfs_kv_fsstat.cpp
nfs_kv_getattr.cpp
nfs_kv_link.cpp
nfs_kv_lookup.cpp
nfs_kv_read.cpp
nfs_kv_readdir.cpp
nfs_kv_remove.cpp
nfs_kv_rename.cpp
nfs_kv_setattr.cpp
nfs_kv_write.cpp
nfs_mount.cpp
nfs_portmap.cpp
sha256.c
nfs/xdr_impl.cpp

2474
src/nfs_conn.cpp
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File diff suppressed because it is too large Load Diff

144
src/nfs_kv.cpp Normal file
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@ -0,0 +1,144 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - common functions
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
nfsstat3 vitastor_nfs_map_err(int err)
{
return (err == EINVAL ? NFS3ERR_INVAL
: (err == ENOENT ? NFS3ERR_NOENT
: (err == ENOSPC ? NFS3ERR_NOSPC
: (err == EEXIST ? NFS3ERR_EXIST
: (err == EIO ? NFS3ERR_IO : (err ? NFS3ERR_IO : NFS3_OK))))));
}
nfstime3 nfstime_from_str(const std::string & s)
{
nfstime3 t;
auto p = s.find(".");
if (p != std::string::npos)
{
t.seconds = stoull_full(s.substr(0, p), 10);
t.nseconds = stoull_full(s.substr(p+1), 10);
p = s.size()-p-1;
for (; p < 9; p++)
t.nseconds *= 10;
for (; p > 9; p--)
t.nseconds /= 10;
}
else
t.seconds = stoull_full(s, 10);
return t;
}
std::string nfstime_to_str(nfstime3 t)
{
char buf[32];
snprintf(buf, sizeof(buf), "%u.%09u", t.seconds, t.nseconds);
return buf;
}
int kv_map_type(const std::string & type)
{
return (type == "" || type == "file" ? NF3REG :
(type == "dir" ? NF3DIR :
(type == "blk" ? NF3BLK :
(type == "chr" ? NF3CHR :
(type == "link" ? NF3LNK :
(type == "sock" ? NF3SOCK :
(type == "fifo" ? NF3FIFO : -1)))))));
}
fattr3 get_kv_attributes(nfs_client_t *self, uint64_t ino, json11::Json attrs)
{
auto type = kv_map_type(attrs["type"].string_value());
auto mode = attrs["mode"].uint64_value();
auto nlink = attrs["nlink"].uint64_value();
nfstime3 mtime = nfstime_from_str(attrs["mtime"].string_value());
nfstime3 atime = attrs["atime"].is_null() ? mtime : nfstime_from_str(attrs["atime"].string_value());
// FIXME In theory we could store the binary structure itself instead of JSON
return (fattr3){
.type = (type == 0 ? NF3REG : (ftype3)type),
.mode = (attrs["mode"].is_null() ? (type == NF3DIR ? 0755 : 0644) : (uint32_t)mode),
.nlink = (nlink == 0 ? 1 : (uint32_t)nlink),
.uid = (uint32_t)attrs["uid"].uint64_value(),
.gid = (uint32_t)attrs["gid"].uint64_value(),
.size = (type == NF3DIR ? 4096 : attrs["size"].uint64_value()),
.used = (type == NF3DIR ? 4096 : attrs["alloc"].uint64_value()),
.rdev = (type == NF3BLK || type == NF3CHR
? (specdata3){ (uint32_t)attrs["major"].uint64_value(), (uint32_t)attrs["minor"].uint64_value() }
: (specdata3){}),
.fsid = self->parent->fsid,
.fileid = ino,
.atime = atime,
.mtime = mtime,
.ctime = mtime,
};
}
std::string kv_direntry_key(uint64_t dir_ino, const std::string & filename)
{
// encode as: d <length> <hex dir_ino> / <filename>
char key[24] = { 0 };
snprintf(key, sizeof(key), "d-%jx/", dir_ino);
int n = strnlen(key, sizeof(key)-1) - 3;
if (n < 10)
key[1] = '0'+n;
else
key[1] = 'A'+(n-10);
return (char*)key + filename;
}
std::string kv_direntry_filename(const std::string & key)
{
// decode as: d <length> <hex dir_ino> / <filename>
auto pos = key.find("/");
if (pos != std::string::npos)
return key.substr(pos+1);
return key;
}
std::string kv_inode_key(uint64_t ino)
{
char key[24] = { 0 };
snprintf(key, sizeof(key), "i-%jx", ino);
int n = strnlen(key, sizeof(key)-1) - 2;
if (n < 10)
key[1] = '0'+n;
else
key[1] = 'A'+(n-10);
return std::string(key, n+2);
}
std::string kv_fh(uint64_t ino)
{
return "S"+std::string((char*)&ino, 8);
}
uint64_t kv_fh_inode(const std::string & fh)
{
if (fh.size() == 1 && fh[0] == 'R')
{
return 1;
}
else if (fh.size() == 9 && fh[0] == 'S')
{
return *(uint64_t*)&fh[1];
}
else if (fh.size() > 17 && fh[0] == 'I')
{
return *(uint64_t*)&fh[fh.size()-8];
}
return 0;
}
bool kv_fh_valid(const std::string & fh)
{
return fh == KV_ROOT_HANDLE || fh.size() == 9 && fh[0] == 'S' || fh.size() > 17 && fh[0] == 'I';
}

328
src/nfs_kv_create.cpp Normal file
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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - CREATE, MKDIR, SYMLINK, MKNOD
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
void allocate_new_id(nfs_client_t *self, std::function<void(int res, uint64_t new_id)> cb)
{
if (self->parent->fs_next_id <= self->parent->fs_allocated_id)
{
cb(0, self->parent->fs_next_id++);
return;
}
else if (self->parent->fs_next_id > self->parent->fs_inode_count)
{
cb(-ENOSPC, 0);
return;
}
self->parent->db->get(KV_NEXT_ID_KEY, [=](int res, const std::string & prev_str)
{
if (res < 0 && res != -ENOENT)
{
cb(res, 0);
return;
}
uint64_t prev_val = stoull_full(prev_str);
if (prev_val >= self->parent->fs_inode_count)
{
cb(-ENOSPC, 0);
return;
}
if (prev_val < 1)
{
prev_val = 1;
}
uint64_t new_val = prev_val + self->parent->id_alloc_batch_size;
if (new_val >= self->parent->fs_inode_count)
{
new_val = self->parent->fs_inode_count;
}
self->parent->db->set(KV_NEXT_ID_KEY, std::to_string(new_val), [=](int res)
{
if (res == -EAGAIN)
{
// CAS failure - retry
allocate_new_id(self, cb);
}
else if (res < 0)
{
cb(res, 0);
}
else
{
self->parent->fs_next_id = prev_val+2;
self->parent->fs_allocated_id = new_val;
cb(0, prev_val+1);
}
}, [prev_val](int res, const std::string & value)
{
// FIXME: Allow to modify value from CAS callback? ("update" query)
return res < 0 || stoull_full(value) == prev_val;
});
});
}
struct kv_create_state
{
nfs_client_t *self = NULL;
rpc_op_t *rop = NULL;
bool exclusive = false;
uint64_t verf = 0;
uint64_t dir_ino = 0;
std::string filename;
uint64_t new_id = 0;
json11::Json::object attrobj;
json11::Json attrs;
std::string direntry_text;
uint64_t dup_ino = 0;
std::function<void(int res)> cb;
};
static void kv_do_create(kv_create_state *st)
{
if (st->self->parent->trace)
fprintf(stderr, "[%d] CREATE %ju/%s ATTRS %s\n", st->self->nfs_fd, st->dir_ino, st->filename.c_str(), json11::Json(st->attrobj).dump().c_str());
if (st->filename == "" || st->filename.find("/") != std::string::npos)
{
auto cb = std::move(st->cb);
cb(-EINVAL);
return;
}
// Generate inode ID
allocate_new_id(st->self, [st](int res, uint64_t new_id)
{
if (res < 0)
{
auto cb = std::move(st->cb);
cb(res);
return;
}
st->new_id = new_id;
auto direntry = json11::Json::object{ { "ino", st->new_id } };
if (st->attrobj["type"].string_value() == "dir")
{
direntry["type"] = "dir";
}
st->attrs = std::move(st->attrobj);
st->direntry_text = json11::Json(direntry).dump().c_str();
// Set direntry
st->self->parent->db->set(kv_direntry_key(st->dir_ino, st->filename), st->direntry_text, [st](int res)
{
if (res < 0)
{
st->self->parent->unallocated_ids.push_back(st->new_id);
if (res == -EAGAIN)
{
if (st->dup_ino)
{
st->new_id = st->dup_ino;
res = 0;
}
else
res = -EEXIST;
}
else
fprintf(stderr, "create %ju/%s failed: %s (code %d)\n", st->dir_ino, st->filename.c_str(), strerror(-res), res);
auto cb = std::move(st->cb);
cb(res);
}
else
{
st->self->parent->db->set(kv_inode_key(st->new_id), st->attrs.dump().c_str(), [st](int res)
{
if (res == -EAGAIN)
{
res = -EEXIST;
}
if (res < 0)
{
st->self->parent->db->del(kv_direntry_key(st->dir_ino, st->filename), [st, res](int del_res)
{
if (!del_res)
{
st->self->parent->unallocated_ids.push_back(st->new_id);
}
auto cb = std::move(st->cb);
cb(res);
}, [st](int res, const std::string & value)
{
return res != -ENOENT && value == st->direntry_text;
});
}
else
{
auto cb = std::move(st->cb);
cb(0);
}
}, [st](int res, const std::string & value)
{
return res == -ENOENT;
});
}
}, [st](int res, const std::string & value)
{
// CAS compare - check that the key doesn't exist
if (res == 0)
{
std::string err;
auto direntry = json11::Json::parse(value, err);
if (err != "")
{
fprintf(stderr, "Invalid JSON in direntry %s = %s: %s, overwriting\n",
kv_direntry_key(st->dir_ino, st->filename).c_str(), value.c_str(), err.c_str());
return true;
}
if (st->exclusive && direntry["verf"].uint64_value() == st->verf)
{
st->dup_ino = direntry["ino"].uint64_value();
return false;
}
return false;
}
return true;
});
});
}
static void kv_create_setattr(json11::Json::object & attrobj, sattr3 & sattr)
{
if (sattr.mode.set_it)
attrobj["mode"] = (uint64_t)sattr.mode.mode;
if (sattr.uid.set_it)
attrobj["uid"] = (uint64_t)sattr.uid.uid;
if (sattr.gid.set_it)
attrobj["gid"] = (uint64_t)sattr.gid.gid;
if (sattr.atime.set_it)
attrobj["atime"] = nfstime_to_str(sattr.atime.atime);
if (sattr.mtime.set_it)
attrobj["mtime"] = nfstime_to_str(sattr.mtime.mtime);
}
template<class T, class Tok> static void kv_create_reply(kv_create_state *st, int res)
{
T *reply = (T*)st->rop->reply;
if (res < 0)
{
*reply = (T){ .status = vitastor_nfs_map_err(-res) };
}
else
{
*reply = (T){
.status = NFS3_OK,
.resok = (Tok){
.obj = {
.handle_follows = 1,
.handle = xdr_copy_string(st->rop->xdrs, kv_fh(st->new_id)),
},
.obj_attributes = {
.attributes_follow = 1,
.attributes = get_kv_attributes(st->self, st->new_id, st->attrs),
},
},
};
}
rpc_queue_reply(st->rop);
delete st;
}
int kv_nfs3_create_proc(void *opaque, rpc_op_t *rop)
{
kv_create_state *st = new kv_create_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
auto args = (CREATE3args*)rop->request;
st->exclusive = args->how.mode == NFS_EXCLUSIVE;
st->verf = st->exclusive ? *(uint64_t*)&args->how.verf : 0;
st->dir_ino = kv_fh_inode(args->where.dir);
st->filename = args->where.name;
if (args->how.mode == NFS_EXCLUSIVE)
{
st->attrobj["verf"] = *(uint64_t*)&args->how.verf;
}
else if (args->how.mode == NFS_UNCHECKED)
{
kv_create_setattr(st->attrobj, args->how.obj_attributes);
if (args->how.obj_attributes.size.set_it)
{
st->attrobj["size"] = (uint64_t)args->how.obj_attributes.size.size;
st->attrobj["empty"] = true;
}
}
st->cb = [st](int res) { kv_create_reply<CREATE3res, CREATE3resok>(st, res); };
kv_do_create(st);
return 1;
}
int kv_nfs3_mkdir_proc(void *opaque, rpc_op_t *rop)
{
kv_create_state *st = new kv_create_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
auto args = (MKDIR3args*)rop->request;
st->dir_ino = kv_fh_inode(args->where.dir);
st->filename = args->where.name;
st->attrobj["type"] = "dir";
st->attrobj["parent_ino"] = st->dir_ino;
kv_create_setattr(st->attrobj, args->attributes);
st->cb = [st](int res) { kv_create_reply<MKDIR3res, MKDIR3resok>(st, res); };
kv_do_create(st);
return 1;
}
int kv_nfs3_symlink_proc(void *opaque, rpc_op_t *rop)
{
kv_create_state *st = new kv_create_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
auto args = (SYMLINK3args*)rop->request;
st->dir_ino = kv_fh_inode(args->where.dir);
st->filename = args->where.name;
st->attrobj["type"] = "link";
st->attrobj["symlink"] = (std::string)args->symlink.symlink_data;
kv_create_setattr(st->attrobj, args->symlink.symlink_attributes);
st->cb = [st](int res) { kv_create_reply<SYMLINK3res, SYMLINK3resok>(st, res); };
kv_do_create(st);
return 1;
}
int kv_nfs3_mknod_proc(void *opaque, rpc_op_t *rop)
{
kv_create_state *st = new kv_create_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
auto args = (MKNOD3args*)rop->request;
st->dir_ino = kv_fh_inode(args->where.dir);
st->filename = args->where.name;
if (args->what.type == NF3CHR || args->what.type == NF3BLK)
{
st->attrobj["type"] = (args->what.type == NF3CHR ? "chr" : "blk");
st->attrobj["major"] = (uint64_t)args->what.chr_device.spec.specdata1;
st->attrobj["minor"] = (uint64_t)args->what.chr_device.spec.specdata2;
kv_create_setattr(st->attrobj, args->what.chr_device.dev_attributes);
}
else if (args->what.type == NF3SOCK || args->what.type == NF3FIFO)
{
st->attrobj["type"] = (args->what.type == NF3SOCK ? "sock" : "fifo");
kv_create_setattr(st->attrobj, args->what.sock_attributes);
}
else
{
*(MKNOD3res*)rop->reply = (MKNOD3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
delete st;
return 0;
}
st->cb = [st](int res) { kv_create_reply<MKNOD3res, MKNOD3resok>(st, res); };
kv_do_create(st);
return 1;
}

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src/nfs_kv_fsstat.cpp Normal file
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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - FSSTAT, FSINFO, PATHCONF
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
// Get file system statistics
int kv_nfs3_fsstat_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
//FSSTAT3args *args = (FSSTAT3args*)rop->request;
if (self->parent->trace)
fprintf(stderr, "[%d] FSSTAT\n", self->nfs_fd);
FSSTAT3res *reply = (FSSTAT3res*)rop->reply;
uint64_t tbytes = 0, fbytes = 0;
auto pst_it = self->parent->pool_stats.find(self->parent->default_pool_id);
if (pst_it != self->parent->pool_stats.end())
{
auto ttb = pst_it->second["total_raw_tb"].number_value();
auto ftb = (pst_it->second["total_raw_tb"].number_value() - pst_it->second["used_raw_tb"].number_value());
tbytes = ttb / pst_it->second["raw_to_usable"].number_value() * ((uint64_t)2<<40);
fbytes = ftb / pst_it->second["raw_to_usable"].number_value() * ((uint64_t)2<<40);
}
*reply = (FSSTAT3res){
.status = NFS3_OK,
.resok = (FSSTAT3resok){
.obj_attributes = {
.attributes_follow = 0,
//.attributes = get_root_attributes(self),
},
.tbytes = tbytes, // total bytes
.fbytes = fbytes, // free bytes
.abytes = fbytes, // available bytes
.tfiles = (size3)(1 << 31), // maximum total files
.ffiles = (size3)(1 << 31), // free files
.afiles = (size3)(1 << 31), // available files
.invarsec = 0,
},
};
rpc_queue_reply(rop);
return 0;
}
int kv_nfs3_fsinfo_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
FSINFO3args *args = (FSINFO3args*)rop->request;
FSINFO3res *reply = (FSINFO3res*)rop->reply;
if (self->parent->trace)
fprintf(stderr, "[%d] FSINFO %s\n", self->nfs_fd, std::string(args->fsroot).c_str());
if (args->fsroot != KV_ROOT_HANDLE)
{
*reply = (FSINFO3res){ .status = NFS3ERR_INVAL };
}
else
{
// Fill info
*reply = (FSINFO3res){
.status = NFS3_OK,
.resok = (FSINFO3resok){
.obj_attributes = {
.attributes_follow = 0,
//.attributes = get_root_attributes(self),
},
.rtmax = 128*1024*1024,
.rtpref = 128*1024*1024,
.rtmult = 4096,
.wtmax = 128*1024*1024,
.wtpref = 128*1024*1024,
.wtmult = 4096,
.dtpref = 128,
.maxfilesize = 0x7fffffffffffffff,
.time_delta = {
.seconds = 1,
.nseconds = 0,
},
.properties = FSF3_SYMLINK | FSF3_HOMOGENEOUS,
},
};
}
rpc_queue_reply(rop);
return 0;
}
int kv_nfs3_pathconf_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
PATHCONF3args *args = (PATHCONF3args*)rop->request;
PATHCONF3res *reply = (PATHCONF3res*)rop->reply;
if (self->parent->trace)
fprintf(stderr, "[%d] PATHCONF %s\n", self->nfs_fd, std::string(args->object).c_str());
if (args->object != KV_ROOT_HANDLE)
{
*reply = (PATHCONF3res){ .status = NFS3ERR_INVAL };
}
else
{
// Fill info
*reply = (PATHCONF3res){
.status = NFS3_OK,
.resok = (PATHCONF3resok){
.obj_attributes = {
// Without at least one reference to a non-constant value (local variable or something else),
// with gcc 8 we get "internal compiler error: side-effects element in no-side-effects CONSTRUCTOR" here
// FIXME: get rid of this after raising compiler requirement
.attributes_follow = 0,
//.attributes = get_root_attributes(self),
},
.linkmax = 0,
.name_max = 255,
.no_trunc = TRUE,
.chown_restricted = FALSE,
.case_insensitive = FALSE,
.case_preserving = TRUE,
},
};
}
rpc_queue_reply(rop);
return 0;
}
nfs_client_t::nfs_client_t()
{
struct rpc_service_proc_t pt[] = {
{NFS_PROGRAM, NFS_V3, NFS3_NULL, nfs3_null_proc, NULL, 0, NULL, 0, this},
{NFS_PROGRAM, NFS_V3, NFS3_GETATTR, kv_nfs3_getattr_proc, (xdrproc_t)xdr_GETATTR3args, sizeof(GETATTR3args), (xdrproc_t)xdr_GETATTR3res, sizeof(GETATTR3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_SETATTR, kv_nfs3_setattr_proc, (xdrproc_t)xdr_SETATTR3args, sizeof(SETATTR3args), (xdrproc_t)xdr_SETATTR3res, sizeof(SETATTR3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_LOOKUP, kv_nfs3_lookup_proc, (xdrproc_t)xdr_LOOKUP3args, sizeof(LOOKUP3args), (xdrproc_t)xdr_LOOKUP3res, sizeof(LOOKUP3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_ACCESS, nfs3_access_proc, (xdrproc_t)xdr_ACCESS3args, sizeof(ACCESS3args), (xdrproc_t)xdr_ACCESS3res, sizeof(ACCESS3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_READLINK, kv_nfs3_readlink_proc, (xdrproc_t)xdr_READLINK3args, sizeof(READLINK3args), (xdrproc_t)xdr_READLINK3res, sizeof(READLINK3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_READ, kv_nfs3_read_proc, (xdrproc_t)xdr_READ3args, sizeof(READ3args), (xdrproc_t)xdr_READ3res, sizeof(READ3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_WRITE, kv_nfs3_write_proc, (xdrproc_t)xdr_WRITE3args, sizeof(WRITE3args), (xdrproc_t)xdr_WRITE3res, sizeof(WRITE3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_CREATE, kv_nfs3_create_proc, (xdrproc_t)xdr_CREATE3args, sizeof(CREATE3args), (xdrproc_t)xdr_CREATE3res, sizeof(CREATE3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_MKDIR, kv_nfs3_mkdir_proc, (xdrproc_t)xdr_MKDIR3args, sizeof(MKDIR3args), (xdrproc_t)xdr_MKDIR3res, sizeof(MKDIR3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_SYMLINK, kv_nfs3_symlink_proc, (xdrproc_t)xdr_SYMLINK3args, sizeof(SYMLINK3args), (xdrproc_t)xdr_SYMLINK3res, sizeof(SYMLINK3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_MKNOD, kv_nfs3_mknod_proc, (xdrproc_t)xdr_MKNOD3args, sizeof(MKNOD3args), (xdrproc_t)xdr_MKNOD3res, sizeof(MKNOD3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_REMOVE, kv_nfs3_remove_proc, (xdrproc_t)xdr_REMOVE3args, sizeof(REMOVE3args), (xdrproc_t)xdr_REMOVE3res, sizeof(REMOVE3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_RMDIR, kv_nfs3_rmdir_proc, (xdrproc_t)xdr_RMDIR3args, sizeof(RMDIR3args), (xdrproc_t)xdr_RMDIR3res, sizeof(RMDIR3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_RENAME, kv_nfs3_rename_proc, (xdrproc_t)xdr_RENAME3args, sizeof(RENAME3args), (xdrproc_t)xdr_RENAME3res, sizeof(RENAME3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_LINK, kv_nfs3_link_proc, (xdrproc_t)xdr_LINK3args, sizeof(LINK3args), (xdrproc_t)xdr_LINK3res, sizeof(LINK3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_READDIR, kv_nfs3_readdir_proc, (xdrproc_t)xdr_READDIR3args, sizeof(READDIR3args), (xdrproc_t)xdr_READDIR3res, sizeof(READDIR3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_READDIRPLUS, kv_nfs3_readdirplus_proc, (xdrproc_t)xdr_READDIRPLUS3args, sizeof(READDIRPLUS3args), (xdrproc_t)xdr_READDIRPLUS3res, sizeof(READDIRPLUS3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_FSSTAT, kv_nfs3_fsstat_proc, (xdrproc_t)xdr_FSSTAT3args, sizeof(FSSTAT3args), (xdrproc_t)xdr_FSSTAT3res, sizeof(FSSTAT3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_FSINFO, kv_nfs3_fsinfo_proc, (xdrproc_t)xdr_FSINFO3args, sizeof(FSINFO3args), (xdrproc_t)xdr_FSINFO3res, sizeof(FSINFO3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_PATHCONF, kv_nfs3_pathconf_proc, (xdrproc_t)xdr_PATHCONF3args, sizeof(PATHCONF3args), (xdrproc_t)xdr_PATHCONF3res, sizeof(PATHCONF3res), this},
{NFS_PROGRAM, NFS_V3, NFS3_COMMIT, nfs3_commit_proc, (xdrproc_t)xdr_COMMIT3args, sizeof(COMMIT3args), (xdrproc_t)xdr_COMMIT3res, sizeof(COMMIT3res), this},
{MOUNT_PROGRAM, MOUNT_V3, MOUNT3_NULL, nfs3_null_proc, NULL, 0, NULL, 0, this},
{MOUNT_PROGRAM, MOUNT_V3, MOUNT3_MNT, mount3_mnt_proc, (xdrproc_t)xdr_nfs_dirpath, sizeof(nfs_dirpath), (xdrproc_t)xdr_nfs_mountres3, sizeof(nfs_mountres3), this},
{MOUNT_PROGRAM, MOUNT_V3, MOUNT3_DUMP, mount3_dump_proc, NULL, 0, (xdrproc_t)xdr_nfs_mountlist, sizeof(nfs_mountlist), this},
{MOUNT_PROGRAM, MOUNT_V3, MOUNT3_UMNT, mount3_umnt_proc, (xdrproc_t)xdr_nfs_dirpath, sizeof(nfs_dirpath), NULL, 0, this},
{MOUNT_PROGRAM, MOUNT_V3, MOUNT3_UMNTALL, mount3_umntall_proc, NULL, 0, NULL, 0, this},
{MOUNT_PROGRAM, MOUNT_V3, MOUNT3_EXPORT, mount3_export_proc, NULL, 0, (xdrproc_t)xdr_nfs_exports, sizeof(nfs_exports), this},
};
for (int i = 0; i < sizeof(pt)/sizeof(pt[0]); i++)
{
proc_table.insert(pt[i]);
}
}
nfs_client_t::~nfs_client_t()
{
}

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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - GETATTR
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
// Attributes are always stored in the inode
void kv_read_inode(nfs_client_t *self, uint64_t ino,
std::function<void(int res, const std::string & value, json11::Json ientry)> cb,
bool allow_cache)
{
auto key = kv_inode_key(ino);
self->parent->db->get(key, [=](int res, const std::string & value)
{
if (ino == KV_ROOT_INODE && res == -ENOENT)
{
// Allow root inode to not exist
cb(0, "", json11::Json(json11::Json::object{ { "type", "dir" } }));
return;
}
if (res < 0)
{
if (res != -ENOENT)
fprintf(stderr, "Error reading inode %s: %s (code %d)\n", kv_inode_key(ino).c_str(), strerror(-res), res);
cb(res, "", json11::Json());
return;
}
std::string err;
auto attrs = json11::Json::parse(value, err);
if (err != "")
{
fprintf(stderr, "Invalid JSON in inode %s = %s: %s\n", kv_inode_key(ino).c_str(), value.c_str(), err.c_str());
res = -EIO;
}
cb(res, value, attrs);
}, allow_cache);
}
int kv_nfs3_getattr_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
GETATTR3args *args = (GETATTR3args*)rop->request;
GETATTR3res *reply = (GETATTR3res*)rop->reply;
std::string fh = args->object;
auto ino = kv_fh_inode(fh);
if (self->parent->trace)
fprintf(stderr, "[%d] GETATTR %ju\n", self->nfs_fd, ino);
if (!kv_fh_valid(fh))
{
*reply = (GETATTR3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
return 0;
}
kv_read_inode(self, ino, [=](int res, const std::string & value, json11::Json attrs)
{
if (res < 0)
{
*reply = (GETATTR3res){ .status = vitastor_nfs_map_err(-res) };
}
else
{
*reply = (GETATTR3res){
.status = NFS3_OK,
.resok = (GETATTR3resok){
.obj_attributes = get_kv_attributes(self, ino, attrs),
},
};
}
rpc_queue_reply(rop);
});
return 1;
}

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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - LINK
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
struct nfs_kv_link_state
{
nfs_client_t *self = NULL;
rpc_op_t *rop = NULL;
uint64_t ino = 0;
uint64_t dir_ino = 0;
std::string filename;
std::string ientry_text;
json11::Json ientry;
bool retrying = false;
int wait = 0;
int res = 0, res2 = 0;
std::function<void(int)> cb;
};
static void nfs_kv_continue_link(nfs_kv_link_state *st, int state)
{
// 1) Read the source inode
// 2) If it's a directory - fail with -EISDIR
// 3) Create the new direntry with the same inode reference
// 4) Update the inode entry with refcount++
// 5) Retry update if CAS failed but the inode exists
// 6) Otherwise fail and remove the new direntry
// Yeah we may leave a bad direntry if we crash
// But the other option is to possibly leave an inode with too big refcount
if (state == 0) {}
else if (state == 1) goto resume_1;
else if (state == 2) goto resume_2;
else if (state == 3) goto resume_3;
else if (state == 4) goto resume_4;
else
{
fprintf(stderr, "BUG: invalid state in nfs_kv_continue_link()");
abort();
}
resume_0:
// Check that the source inode exists and is not a directory
st->wait = st->retrying ? 1 : 2;
st->res2 = 0;
kv_read_inode(st->self, st->ino, [st](int res, const std::string & value, json11::Json attrs)
{
st->res = res == 0 ? (attrs["type"].string_value() == "dir" ? -EISDIR : 0) : res;
st->ientry_text = value;
st->ientry = attrs;
if (!--st->wait)
nfs_kv_continue_link(st, 1);
});
if (!st->retrying)
{
// Check that the new directory exists
kv_read_inode(st->self, st->dir_ino, [st](int res, const std::string & value, json11::Json attrs)
{
st->res2 = res == 0 ? (attrs["type"].string_value() == "dir" ? 0 : -ENOTDIR) : res;
if (!--st->wait)
nfs_kv_continue_link(st, 1);
});
}
return;
resume_1:
if (st->res < 0 || st->res2 < 0)
{
auto cb = std::move(st->cb);
cb(st->res < 0 ? st->res : st->res2);
return;
}
// Write the new direntry
if (!st->retrying)
{
st->self->parent->db->set(kv_direntry_key(st->dir_ino, st->filename),
json11::Json(json11::Json::object{ { "ino", st->ino } }).dump(), [st](int res)
{
st->res = res;
nfs_kv_continue_link(st, 2);
}, [st](int res, const std::string & old_value)
{
return res == -ENOENT;
});
return;
resume_2:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
}
// Increase inode refcount
{
auto new_ientry = st->ientry.object_items();
auto nlink = new_ientry["nlink"].uint64_value();
new_ientry["nlink"] = nlink ? nlink+1 : 2;
st->ientry = new_ientry;
}
st->self->parent->db->set(kv_inode_key(st->ino), st->ientry.dump(), [st](int res)
{
st->res = res;
nfs_kv_continue_link(st, 3);
}, [st](int res, const std::string & old_value)
{
st->res2 = res;
return res == 0 && old_value == st->ientry_text;
});
return;
resume_3:
if (st->res2 == -ENOENT)
{
st->res = -ENOENT;
}
if (st->res == -EAGAIN)
{
// Re-read inode and retry
st->retrying = true;
goto resume_0;
}
if (st->res < 0)
{
// Maybe inode was deleted in the meantime, delete our direntry
st->self->parent->db->del(kv_direntry_key(st->dir_ino, st->filename), [st](int res)
{
st->res2 = res;
nfs_kv_continue_link(st, 4);
});
return;
resume_4:
if (st->res2 < 0)
{
fprintf(stderr, "Warning: failed to delete new linked direntry %ju/%s: %s (code %d)\n",
st->dir_ino, st->filename.c_str(), strerror(-st->res2), st->res2);
}
}
auto cb = std::move(st->cb);
cb(st->res);
}
// FIXME: We'll need some tests for the FS
int kv_nfs3_link_proc(void *opaque, rpc_op_t *rop)
{
auto st = new nfs_kv_link_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
LINK3args *args = (LINK3args*)rop->request;
st->ino = kv_fh_inode(args->file);
st->dir_ino = kv_fh_inode(args->link.dir);
st->filename = args->link.name;
if (st->self->parent->trace)
fprintf(stderr, "[%d] LINK %ju -> %ju/%s\n", st->self->nfs_fd, st->ino, st->dir_ino, st->filename.c_str());
if (!st->ino || !st->dir_ino || st->filename == "")
{
LINK3res *reply = (LINK3res*)rop->reply;
*reply = (LINK3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
delete st;
return 0;
}
st->cb = [st](int res)
{
LINK3res *reply = (LINK3res*)st->rop->reply;
if (res < 0)
{
*reply = (LINK3res){ .status = vitastor_nfs_map_err(res) };
}
else
{
*reply = (LINK3res){
.status = NFS3_OK,
.resok = (LINK3resok){
.file_attributes = (post_op_attr){
.attributes_follow = 1,
.attributes = get_kv_attributes(st->self, st->ino, st->ientry),
},
},
};
}
rpc_queue_reply(st->rop);
delete st;
};
nfs_kv_continue_link(st, 0);
return 1;
}

109
src/nfs_kv_lookup.cpp Normal file
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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - LOOKUP, READLINK
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
int kv_nfs3_lookup_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
LOOKUP3args *args = (LOOKUP3args*)rop->request;
LOOKUP3res *reply = (LOOKUP3res*)rop->reply;
inode_t dir_ino = kv_fh_inode(args->what.dir);
std::string filename = args->what.name;
if (self->parent->trace)
fprintf(stderr, "[%d] LOOKUP %ju/%s\n", self->nfs_fd, dir_ino, filename.c_str());
if (!dir_ino || filename == "")
{
*reply = (LOOKUP3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
return 0;
}
self->parent->db->get(kv_direntry_key(dir_ino, filename), [=](int res, const std::string & value)
{
if (res < 0)
{
*reply = (LOOKUP3res){ .status = vitastor_nfs_map_err(-res) };
rpc_queue_reply(rop);
return;
}
std::string err;
auto direntry = json11::Json::parse(value, err);
if (err != "")
{
fprintf(stderr, "Invalid JSON in direntry %s = %s: %s\n", kv_direntry_key(dir_ino, filename).c_str(), value.c_str(), err.c_str());
*reply = (LOOKUP3res){ .status = NFS3ERR_IO };
rpc_queue_reply(rop);
return;
}
uint64_t ino = direntry["ino"].uint64_value();
kv_read_inode(self, ino, [=](int res, const std::string & value, json11::Json ientry)
{
if (res < 0)
{
*reply = (LOOKUP3res){ .status = vitastor_nfs_map_err(res == -ENOENT ? -EIO : res) };
rpc_queue_reply(rop);
return;
}
*reply = (LOOKUP3res){
.status = NFS3_OK,
.resok = (LOOKUP3resok){
.object = xdr_copy_string(rop->xdrs, kv_fh(ino)),
.obj_attributes = {
.attributes_follow = 1,
.attributes = get_kv_attributes(self, ino, ientry),
},
},
};
rpc_queue_reply(rop);
});
});
return 1;
}
int kv_nfs3_readlink_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
READLINK3args *args = (READLINK3args*)rop->request;
if (self->parent->trace)
fprintf(stderr, "[%d] READLINK %ju\n", self->nfs_fd, kv_fh_inode(args->symlink));
READLINK3res *reply = (READLINK3res*)rop->reply;
if (!kv_fh_valid(args->symlink) || args->symlink == KV_ROOT_HANDLE)
{
// Invalid filehandle or trying to read symlink from root entry
*reply = (READLINK3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
return 0;
}
kv_read_inode(self, kv_fh_inode(args->symlink), [=](int res, const std::string & value, json11::Json attrs)
{
if (res < 0)
{
*reply = (READLINK3res){ .status = vitastor_nfs_map_err(-res) };
}
else if (attrs["type"] != "link")
{
*reply = (READLINK3res){ .status = NFS3ERR_INVAL };
}
else
{
*reply = (READLINK3res){
.status = NFS3_OK,
.resok = (READLINK3resok){
.data = xdr_copy_string(rop->xdrs, attrs["symlink"].string_value()),
},
};
}
rpc_queue_reply(rop);
});
return 1;
}

69
src/nfs_kv_read.cpp Normal file
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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - READ
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
int kv_nfs3_read_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
READ3args *args = (READ3args*)rop->request;
READ3res *reply = (READ3res*)rop->reply;
inode_t ino = kv_fh_inode(args->file);
if (args->count > MAX_REQUEST_SIZE || !ino)
{
*reply = (READ3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
return 0;
}
uint64_t alignment = self->parent->cli->st_cli.global_bitmap_granularity;
auto pool_cfg = self->parent->cli->st_cli.pool_config.find(INODE_POOL(self->parent->fs_base_inode));
if (pool_cfg != self->parent->cli->st_cli.pool_config.end())
{
alignment = pool_cfg->second.bitmap_granularity;
}
uint64_t aligned_offset = args->offset - (args->offset % alignment);
uint64_t aligned_count = args->offset + args->count;
if (aligned_count % alignment)
aligned_count = aligned_count + alignment - (aligned_count % alignment);
aligned_count -= aligned_offset;
void *buf = malloc_or_die(aligned_count);
xdr_add_malloc(rop->xdrs, buf);
cluster_op_t *op = new cluster_op_t;
op->opcode = OSD_OP_READ;
op->inode = self->parent->fs_base_inode + ino;
op->offset = aligned_offset;
op->len = aligned_count;
op->iov.push_back(buf, aligned_count);
*reply = (READ3res){ .status = NFS3_OK };
reply->resok.data.data = (char*)buf + args->offset - aligned_offset;
reply->resok.data.size = args->count;
op->callback = [rop](cluster_op_t *op)
{
READ3res *reply = (READ3res*)rop->reply;
if (op->retval != op->len)
{
*reply = (READ3res){ .status = vitastor_nfs_map_err(-op->retval) };
}
else
{
auto & reply_ok = reply->resok;
// reply_ok.data.data is already set above
reply_ok.count = reply_ok.data.size;
reply_ok.eof = 0;
}
rpc_queue_reply(rop);
delete op;
};
self->parent->cli->execute(op);
return 1;
}

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src/nfs_kv_readdir.cpp Normal file
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// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - READDIR, READDIRPLUS
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
static unsigned len_pad4(unsigned len)
{
return len + (len&3 ? 4-(len&3) : 0);
}
struct nfs_kv_readdir_state
{
nfs_client_t *self = NULL;
rpc_op_t *rop = NULL;
// Request:
bool is_plus = false;
uint64_t cookie = 0;
uint64_t cookieverf = 0;
uint64_t dir_ino = 0;
uint64_t maxcount = 0;
std::function<void(int)> cb;
// State:
int res = 0;
std::string prefix, start;
void *list_handle;
uint64_t parent_ino = 0;
std::string ientry_text, parent_ientry_text;
json11::Json ientry, parent_ientry;
std::string cur_key, cur_value;
int reply_size = 0;
int to_skip = 0;
uint64_t offset = 0;
int getattr_running = 0, getattr_cur = 0;
// Result:
bool eof = false;
//uint64_t cookieverf = 0; // same field
std::vector<entryplus3> entries;
};
static void nfs_kv_continue_readdir(nfs_kv_readdir_state *st, int state);
static void kv_getattr_next(nfs_kv_readdir_state *st)
{
while (st->is_plus && st->getattr_cur < st->entries.size() && st->getattr_running < st->self->parent->readdir_getattr_parallel)
{
auto idx = st->getattr_cur++;
st->getattr_running++;
kv_read_inode(st->self, st->entries[idx].fileid, [st, idx](int res, const std::string & value, json11::Json ientry)
{
if (res == 0)
{
st->entries[idx].name_attributes = (post_op_attr){
// FIXME: maybe do not read parent attributes and leave them to a GETATTR?
.attributes_follow = 1,
.attributes = get_kv_attributes(st->self, st->entries[idx].fileid, ientry),
};
}
st->getattr_running--;
kv_getattr_next(st);
if (st->getattr_running == 0 && !st->list_handle)
{
nfs_kv_continue_readdir(st, 4);
}
});
}
}
static void nfs_kv_continue_readdir(nfs_kv_readdir_state *st, int state)
{
if (state == 0) {}
else if (state == 1) goto resume_1;
else if (state == 2) goto resume_2;
else if (state == 3) goto resume_3;
else if (state == 4) goto resume_4;
else
{
fprintf(stderr, "BUG: invalid state in nfs_kv_continue_readdir()");
abort();
}
// Limit results based on maximum reply size
// Sadly we have to calculate reply size by hand
// reply without entries is 4+4+(dir_attributes ? sizeof(fattr3) : 0)+8+4 bytes
st->reply_size = 20;
if (st->reply_size > st->maxcount)
{
// Error, too small max reply size
auto cb = std::move(st->cb);
cb(-NFS3ERR_TOOSMALL);
return;
}
// Add . and ..
if (st->cookie <= 1)
{
kv_read_inode(st->self, st->dir_ino, [st](int res, const std::string & value, json11::Json ientry)
{
st->res = res;
st->ientry_text = value;
st->ientry = ientry;
nfs_kv_continue_readdir(st, 1);
});
return;
resume_1:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
if (st->cookie == 0)
{
auto fh = kv_fh(st->dir_ino);
auto entry_size = 20 + 4/*len_pad4(".")*/ + (st->is_plus ? 8 + 88 + len_pad4(fh.size()) : 0);
if (st->reply_size + entry_size > st->maxcount)
{
auto cb = std::move(st->cb);
cb(-NFS3ERR_TOOSMALL);
return;
}
entryplus3 dot = {};
dot.name = xdr_copy_string(st->rop->xdrs, ".");
dot.fileid = st->dir_ino;
dot.name_attributes = (post_op_attr){
.attributes_follow = 1,
.attributes = get_kv_attributes(st->self, st->dir_ino, st->ientry),
};
dot.name_handle = (post_op_fh3){
.handle_follows = 1,
.handle = xdr_copy_string(st->rop->xdrs, fh),
};
st->entries.push_back(dot);
st->reply_size += entry_size;
}
st->parent_ino = st->ientry["parent_ino"].uint64_value();
if (st->parent_ino)
{
kv_read_inode(st->self, st->ientry["parent_ino"].uint64_value(), [st](int res, const std::string & value, json11::Json ientry)
{
st->res = res;
st->parent_ientry_text = value;
st->parent_ientry = ientry;
nfs_kv_continue_readdir(st, 2);
});
return;
resume_2:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
}
auto fh = kv_fh(st->parent_ino);
auto entry_size = 20 + 4/*len_pad4("..")*/ + (st->is_plus ? 8 + 88 + len_pad4(fh.size()) : 0);
if (st->reply_size + entry_size > st->maxcount)
{
st->eof = false;
auto cb = std::move(st->cb);
cb(0);
return;
}
entryplus3 dotdot = {};
dotdot.name = xdr_copy_string(st->rop->xdrs, "..");
dotdot.fileid = st->dir_ino;
dotdot.name_attributes = (post_op_attr){
// FIXME: maybe do not read parent attributes and leave them to a GETATTR?
.attributes_follow = 1,
.attributes = get_kv_attributes(st->self,
st->parent_ino ? st->parent_ino : st->dir_ino,
st->parent_ino ? st->parent_ientry : st->ientry),
};
dotdot.name_handle = (post_op_fh3){
.handle_follows = 1,
.handle = xdr_copy_string(st->rop->xdrs, fh),
};
st->entries.push_back(dotdot);
st->reply_size += entry_size;
}
st->prefix = kv_direntry_key(st->dir_ino, "");
st->eof = true;
st->start = st->prefix;
if (st->cookie > 1)
{
auto lc_it = st->self->parent->list_cookies.find((list_cookie_t){ st->dir_ino, st->cookieverf, st->cookie });
if (lc_it != st->self->parent->list_cookies.end())
{
st->start = lc_it->second.key;
st->to_skip = 1;
st->offset = st->cookie;
}
else
{
st->to_skip = st->cookie-2;
st->offset = 2;
st->cookieverf = ((uint64_t)lrand48() | ((uint64_t)lrand48() << 31) | ((uint64_t)lrand48() << 62));
}
}
else
{
st->to_skip = 0;
st->offset = 2;
st->cookieverf = ((uint64_t)lrand48() | ((uint64_t)lrand48() << 31) | ((uint64_t)lrand48() << 62));
}
{
auto lc_it = st->self->parent->list_cookies.lower_bound((list_cookie_t){ st->dir_ino, st->cookieverf, 0 });
if (lc_it != st->self->parent->list_cookies.end() &&
lc_it->first.dir_ino == st->dir_ino &&
lc_it->first.cookieverf == st->cookieverf &&
lc_it->first.cookie < st->cookie)
{
auto lc_start = lc_it;
while (lc_it != st->self->parent->list_cookies.end() && lc_it->first.cookieverf == st->cookieverf)
{
lc_it++;
}
st->self->parent->list_cookies.erase(lc_start, lc_it);
}
}
st->getattr_cur = st->entries.size();
st->list_handle = st->self->parent->db->list_start(st->start);
st->self->parent->db->list_next(st->list_handle, [=](int res, const std::string & key, const std::string & value)
{
st->res = res;
st->cur_key = key;
st->cur_value = value;
nfs_kv_continue_readdir(st, 3);
});
return;
while (st->list_handle)
{
st->self->parent->db->list_next(st->list_handle, NULL);
return;
resume_3:
if (st->res == -ENOENT || st->cur_key.size() > st->prefix.size() || st->cur_key.substr(0, st->prefix.size()) != st->prefix)
{
st->self->parent->db->list_close(st->list_handle);
st->list_handle = NULL;
break;
}
if (st->to_skip > 0)
{
st->to_skip--;
continue;
}
std::string err;
auto direntry = json11::Json::parse(st->cur_value, err);
if (err != "")
{
fprintf(stderr, "readdir: direntry %s contains invalid JSON: %s, skipping\n",
st->cur_key.c_str(), st->cur_value.c_str());
continue;
}
auto ino = direntry["ino"].uint64_value();
auto name = kv_direntry_filename(st->cur_key);
auto fh = kv_fh(ino);
// 1 entry3 is (8+4+(filename_len+3)/4*4+8) bytes
// 1 entryplus3 is (8+4+(filename_len+3)/4*4+8
// + 4+(name_attributes ? (sizeof(fattr3) = 84) : 0)
// + 4+(name_handle ? 4+(handle_len+3)/4*4 : 0)) bytes
auto entry_size = 20 + len_pad4(name.size()) + (st->is_plus ? 8 + 88 + len_pad4(fh.size()) : 0);
if (st->reply_size + entry_size > st->maxcount)
{
st->eof = false;
st->self->parent->db->list_close(st->list_handle);
st->list_handle = NULL;
break;
}
st->reply_size += entry_size;
auto idx = st->entries.size();
st->entries.push_back((entryplus3){});
auto entry = &st->entries[idx];
entry->name = xdr_copy_string(st->rop->xdrs, name);
entry->fileid = ino;
entry->cookie = st->offset++;
st->self->parent->list_cookies[(list_cookie_t){ st->dir_ino, st->cookieverf, entry->cookie }] = { .key = entry->name };
if (st->is_plus)
{
entry->name_handle = (post_op_fh3){
.handle_follows = 1,
.handle = xdr_copy_string(st->rop->xdrs, fh),
};
kv_getattr_next(st);
}
st->self->parent->db->list_next(st->list_handle, NULL);
}
resume_4:
while (st->getattr_running > 0)
{
return;
}
void *prev = NULL;
for (int i = 0; i < st->entries.size(); i++)
{
entryplus3 *entry = &st->entries[i];
if (prev)
{
if (st->is_plus)
((entryplus3*)prev)->nextentry = entry;
else
((entry3*)prev)->nextentry = (entry3*)entry;
}
prev = entry;
}
// Send reply
auto cb = std::move(st->cb);
cb(0);
}
static void nfs3_readdir_common(void *opaque, rpc_op_t *rop, bool is_plus)
{
auto st = new nfs_kv_readdir_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
st->is_plus = is_plus;
if (st->is_plus)
{
READDIRPLUS3args *args = (READDIRPLUS3args*)rop->request;
st->dir_ino = kv_fh_inode(args->dir);
st->cookie = args->cookie;
st->cookieverf = *((uint64_t*)args->cookieverf);
st->maxcount = args->maxcount;
}
else
{
READDIR3args *args = ((READDIR3args*)rop->request);
st->dir_ino = kv_fh_inode(args->dir);
st->cookie = args->cookie;
st->cookieverf = *((uint64_t*)args->cookieverf);
st->maxcount = args->count;
}
if (st->self->parent->trace)
fprintf(stderr, "[%d] READDIR %ju VERF %jx OFFSET %ju LIMIT %ju\n", st->self->nfs_fd, st->dir_ino, st->cookieverf, st->cookie, st->maxcount);
st->cb = [st](int res)
{
if (st->is_plus)
{
READDIRPLUS3res *reply = (READDIRPLUS3res*)st->rop->reply;
*reply = (READDIRPLUS3res){ .status = vitastor_nfs_map_err(res) };
*(uint64_t*)(reply->resok.cookieverf) = st->cookieverf;
reply->resok.reply.entries = st->entries.size() ? &st->entries[0] : NULL;
reply->resok.reply.eof = st->eof;
}
else
{
READDIR3res *reply = (READDIR3res*)st->rop->reply;
*reply = (READDIR3res){ .status = vitastor_nfs_map_err(res) };
*(uint64_t*)(reply->resok.cookieverf) = st->cookieverf;
reply->resok.reply.entries = st->entries.size() ? (entry3*)&st->entries[0] : NULL;
reply->resok.reply.eof = st->eof;
}
rpc_queue_reply(st->rop);
delete st;
};
nfs_kv_continue_readdir(st, 0);
}
int kv_nfs3_readdir_proc(void *opaque, rpc_op_t *rop)
{
nfs3_readdir_common(opaque, rop, false);
return 0;
}
int kv_nfs3_readdirplus_proc(void *opaque, rpc_op_t *rop)
{
nfs3_readdir_common(opaque, rop, true);
return 0;
}

316
src/nfs_kv_remove.cpp Normal file
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@ -0,0 +1,316 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - REMOVE, RMDIR
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
struct kv_del_state
{
nfs_client_t *self = NULL;
rpc_op_t *rop = NULL;
uint64_t dir_ino = 0;
std::string filename;
uint64_t ino = 0;
void *list_handle = NULL;
std::string prefix, list_key, direntry_text, ientry_text;
json11::Json direntry, ientry;
int type = 0;
bool is_rmdir = false;
bool rm_data = false;
int res = 0, res2 = 0;
std::function<void(int)> cb;
};
static void nfs_kv_continue_delete(kv_del_state *st, int state)
{
// Overall algorithm:
// 1) Get inode attributes and check that it's not a directory (REMOVE)
// 2) Get inode attributes and check that it is a directory (RMDIR)
// 3) Delete direntry with CAS
// 4) Check that the directory didn't contain files (RMDIR) and restore it if it did
// 5) Reduce inode refcount by 1 or delete inode
// 6) If regular file and inode is deleted: delete data
if (state == 0) {}
else if (state == 1) goto resume_1;
else if (state == 2) goto resume_2;
else if (state == 3) goto resume_3;
else if (state == 4) goto resume_4;
else if (state == 5) goto resume_5;
else if (state == 6) goto resume_6;
else if (state == 7) goto resume_7;
else
{
fprintf(stderr, "BUG: invalid state in nfs_kv_continue_delete()");
abort();
}
st->self->parent->db->get(kv_direntry_key(st->dir_ino, st->filename), [st](int res, const std::string & value)
{
st->res = res;
st->direntry_text = value;
nfs_kv_continue_delete(st, 1);
});
return;
resume_1:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
{
std::string err;
st->direntry = json11::Json::parse(st->direntry_text, err);
if (err != "")
{
fprintf(stderr, "Invalid JSON in direntry %s = %s: %s, deleting\n",
kv_direntry_key(st->dir_ino, st->filename).c_str(), st->direntry_text.c_str(), err.c_str());
// Just delete direntry and skip inode
}
else
{
st->ino = st->direntry["ino"].uint64_value();
}
}
// Get inode
st->self->parent->db->get(kv_inode_key(st->ino), [st](int res, const std::string & value)
{
st->res = res;
st->ientry_text = value;
nfs_kv_continue_delete(st, 2);
});
return;
resume_2:
if (st->res < 0)
{
fprintf(stderr, "error reading inode %s: %s (code %d)\n",
kv_inode_key(st->ino).c_str(), strerror(-st->res), st->res);
auto cb = std::move(st->cb);
cb(st->res);
return;
}
{
std::string err;
st->ientry = json11::Json::parse(st->ientry_text, err);
if (err != "")
{
fprintf(stderr, "Invalid JSON in inode %s = %s: %s, treating as a regular file\n",
kv_inode_key(st->ino).c_str(), st->ientry_text.c_str(), err.c_str());
}
}
// (1-2) Check type
st->type = kv_map_type(st->ientry["type"].string_value());
if (st->type == -1 || st->is_rmdir != (st->type == NF3DIR))
{
auto cb = std::move(st->cb);
cb(st->is_rmdir ? -ENOTDIR : -EISDIR);
return;
}
// (3) Delete direntry with CAS
st->self->parent->db->del(kv_direntry_key(st->dir_ino, st->filename), [st](int res)
{
st->res = res;
nfs_kv_continue_delete(st, 3);
}, [st](int res, const std::string & value)
{
return value == st->direntry_text;
});
return;
resume_3:
if (st->res == -EAGAIN)
{
// CAS failure, restart from the beginning
nfs_kv_continue_delete(st, 0);
return;
}
else if (st->res < 0 && st->res != -ENOENT)
{
fprintf(stderr, "failed to remove direntry %s: %s (code %d)\n",
kv_direntry_key(st->dir_ino, st->filename).c_str(), strerror(-st->res), st->res);
auto cb = std::move(st->cb);
cb(st->res);
return;
}
if (!st->ino)
{
// direntry contained invalid JSON and was deleted, finish
auto cb = std::move(st->cb);
cb(0);
return;
}
if (st->is_rmdir)
{
// (4) Check if directory actually is not empty
st->list_handle = st->self->parent->db->list_start(kv_direntry_key(st->ino, ""));
st->self->parent->db->list_next(st->list_handle, [st](int res, const std::string & key, const std::string & value)
{
st->res = res;
st->list_key = key;
st->self->parent->db->list_close(st->list_handle);
nfs_kv_continue_delete(st, 4);
});
return;
resume_4:
st->prefix = kv_direntry_key(st->ino, "");
if (st->res == -ENOENT || st->list_key.size() < st->prefix.size() || st->list_key.substr(0, st->prefix.size()) != st->prefix)
{
// OK, directory is empty
}
else
{
// Not OK, restore direntry
st->self->parent->db->del(kv_direntry_key(st->dir_ino, st->filename), [st](int res)
{
st->res2 = res;
nfs_kv_continue_delete(st, 5);
}, [st](int res, const std::string & value)
{
return res == -ENOENT;
});
return;
resume_5:
if (st->res2 < 0)
{
fprintf(stderr, "failed to restore direntry %s (%s): %s (code %d)",
kv_direntry_key(st->dir_ino, st->filename).c_str(), st->direntry_text.c_str(), strerror(-st->res2), st->res2);
fprintf(stderr, " - inode %ju may be left as garbage\n", st->ino);
}
if (st->res < 0)
{
fprintf(stderr, "failed to list entries from %s: %s (code %d)\n",
kv_direntry_key(st->ino, "").c_str(), strerror(-st->res), st->res);
}
auto cb = std::move(st->cb);
cb(st->res < 0 ? st->res : -ENOTEMPTY);
return;
}
}
// (5) Reduce inode refcount by 1 or delete inode
if (st->ientry["nlink"].uint64_value() > 1)
{
auto copy = st->ientry.object_items();
copy["nlink"] = st->ientry["nlink"].uint64_value()-1;
st->self->parent->db->set(kv_inode_key(st->ino), json11::Json(copy).dump(), [st](int res)
{
st->res = res;
nfs_kv_continue_delete(st, 6);
}, [st](int res, const std::string & old_value)
{
return old_value == st->ientry_text;
});
}
else
{
st->self->parent->db->del(kv_inode_key(st->ino), [st](int res)
{
st->res = res;
nfs_kv_continue_delete(st, 6);
}, [st](int res, const std::string & old_value)
{
return old_value == st->ientry_text;
});
}
return;
resume_6:
if (st->res < 0)
{
// Assume EAGAIN is OK, maybe someone created a hard link in the meantime
auto cb = std::move(st->cb);
cb(st->res == -EAGAIN ? 0 : st->res);
return;
}
// (6) If regular file and inode is deleted: delete data
if ((!st->type || st->type == NF3REG) && st->ientry["nlink"].uint64_value() <= 1)
{
// Remove data
st->self->parent->cmd->loop_and_wait(st->self->parent->cmd->start_rm_data(json11::Json::object {
{ "inode", INODE_NO_POOL(st->self->parent->fs_base_inode + st->ino) },
{ "pool", (uint64_t)INODE_POOL(st->self->parent->fs_base_inode + st->ino) },
}), [st](const cli_result_t & r)
{
if (r.err)
{
fprintf(stderr, "Failed to remove inode %jx data: %s (code %d)\n",
st->ino, r.text.c_str(), r.err);
}
st->res = r.err;
nfs_kv_continue_delete(st, 7);
});
return;
resume_7:
auto cb = std::move(st->cb);
cb(st->res);
return;
}
auto cb = std::move(st->cb);
cb(0);
}
int kv_nfs3_remove_proc(void *opaque, rpc_op_t *rop)
{
kv_del_state *st = new kv_del_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
REMOVE3res *reply = (REMOVE3res*)rop->reply;
REMOVE3args *args = (REMOVE3args*)rop->request;
st->dir_ino = kv_fh_inode(args->object.dir);
st->filename = args->object.name;
if (st->self->parent->trace)
fprintf(stderr, "[%d] REMOVE %ju/%s\n", st->self->nfs_fd, st->dir_ino, st->filename.c_str());
if (!st->dir_ino)
{
*reply = (REMOVE3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
delete st;
return 0;
}
st->cb = [st](int res)
{
*((REMOVE3res*)st->rop->reply) = (REMOVE3res){
.status = vitastor_nfs_map_err(res),
};
rpc_queue_reply(st->rop);
delete st;
};
nfs_kv_continue_delete(st, 0);
return 1;
}
int kv_nfs3_rmdir_proc(void *opaque, rpc_op_t *rop)
{
kv_del_state *st = new kv_del_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
RMDIR3args *args = (RMDIR3args*)rop->request;
RMDIR3res *reply = (RMDIR3res*)rop->reply;
st->dir_ino = kv_fh_inode(args->object.dir);
st->filename = args->object.name;
st->is_rmdir = true;
if (st->self->parent->trace)
fprintf(stderr, "[%d] RMDIR %ju/%s\n", st->self->nfs_fd, st->dir_ino, st->filename.c_str());
if (!st->dir_ino)
{
*reply = (RMDIR3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
delete st;
return 0;
}
st->cb = [st](int res)
{
*((RMDIR3res*)st->rop->reply) = (RMDIR3res){
.status = vitastor_nfs_map_err(res),
};
rpc_queue_reply(st->rop);
delete st;
};
nfs_kv_continue_delete(st, 0);
return 1;
}

211
src/nfs_kv_rename.cpp Normal file
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@ -0,0 +1,211 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - RENAME
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
struct nfs_kv_rename_state
{
nfs_client_t *self = NULL;
rpc_op_t *rop = NULL;
uint64_t old_dir_ino = 0, new_dir_ino = 0;
std::string old_name, new_name;
std::string old_direntry_text;
std::string ientry_text;
json11::Json direntry, ientry;
int res = 0, res2 = 0;
std::function<void(int)> cb;
};
static void nfs_kv_continue_rename(nfs_kv_rename_state *st, int state)
{
// Simplified algorithm (non-atomic and without ENOTDIR/EISDIR):
// 1) Check if the target directory exists
// 2) Delete & save (using CAS) the source direntry
// 3) Write the target direntry using CAS, fail if it already exists
// 4) Restore the source direntry on failure
// Atomic version would require something like a journal
if (state == 0) {}
else if (state == 1) goto resume_1;
else if (state == 2) goto resume_2;
else if (state == 3) goto resume_3;
else if (state == 4) goto resume_4;
else if (state == 5) goto resume_5;
else if (state == 6) goto resume_6;
else
{
fprintf(stderr, "BUG: invalid state in nfs_kv_continue_rename()");
abort();
}
kv_read_inode(st->self, st->new_dir_ino, [st](int res, const std::string & value, json11::Json attrs)
{
st->res = res == 0 ? (attrs["type"].string_value() == "dir" ? 0 : -ENOTDIR) : res;
nfs_kv_continue_rename(st, 1);
});
return;
resume_1:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
// Read & delete the old direntry
st->self->parent->db->del(kv_direntry_key(st->old_dir_ino, st->old_name), [st](int res)
{
st->res = res;
nfs_kv_continue_rename(st, 2);
}, [=](int res, const std::string & old_value)
{
st->res = res;
st->old_direntry_text = old_value;
return true;
});
return;
resume_2:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
{
std::string err;
st->direntry = json11::Json::parse(st->old_direntry_text, err);
if (err != "")
{
fprintf(stderr, "Invalid JSON in direntry %s = %s: %s\n",
kv_direntry_key(st->old_dir_ino, st->old_name).c_str(),
st->old_direntry_text.c_str(), err.c_str());
}
}
if (st->direntry["type"].string_value() == "dir" &&
st->direntry["ino"].uint64_value() != 0 &&
st->new_dir_ino != st->old_dir_ino)
{
// Read & check inode
kv_read_inode(st->self, st->direntry["ino"].uint64_value(), [st](int res, const std::string & value, json11::Json ientry)
{
st->res = res;
st->ientry_text = value;
st->ientry = ientry;
nfs_kv_continue_rename(st, 3);
});
return;
resume_3:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
// Change parent reference
{
auto ientry_new = st->ientry.object_items();
ientry_new["parent_ino"] = st->new_dir_ino;
st->self->parent->db->set(kv_inode_key(st->direntry["ino"].uint64_value()), json11::Json(ientry_new).dump(), [st](int res)
{
st->res = res;
nfs_kv_continue_rename(st, 4);
}, [st](int res, const std::string & old_value)
{
return old_value == st->ientry_text;
});
}
return;
resume_4:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
}
st->self->parent->db->set(kv_direntry_key(st->new_dir_ino, st->new_name), st->old_direntry_text, [st](int res)
{
st->res = res;
nfs_kv_continue_rename(st, 5);
}, [st](int res, const std::string & old_value)
{
return res == -ENOENT;
});
return;
resume_5:
if (st->res < 0)
{
if (st->res == -EAGAIN)
st->res = -EEXIST;
st->res2 = st->res;
st->self->parent->db->set(kv_direntry_key(st->old_dir_ino, st->old_name), st->old_direntry_text, [st](int res)
{
st->res = res;
nfs_kv_continue_rename(st, 6);
}, [st](int res, const std::string & old_value)
{
return res == -ENOENT;
});
return;
resume_6:
if (st->res < 0)
{
if (st->res == -EAGAIN)
st->res = -EEXIST;
fprintf(stderr, "error restoring %s = %s after failed rename: %s (code %d)\n",
kv_direntry_key(st->old_dir_ino, st->old_name).c_str(), st->old_direntry_text.c_str(),
strerror(-st->res), st->res);
}
auto cb = std::move(st->cb);
cb(st->res2);
return;
}
auto cb = std::move(st->cb);
cb(st->res);
}
int kv_nfs3_rename_proc(void *opaque, rpc_op_t *rop)
{
auto st = new nfs_kv_rename_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
RENAME3args *args = (RENAME3args*)rop->request;
st->old_dir_ino = kv_fh_inode(args->from.dir);
st->new_dir_ino = kv_fh_inode(args->to.dir);
st->old_name = args->from.name;
st->new_name = args->to.name;
if (st->self->parent->trace)
fprintf(stderr, "[%d] RENAME %ju/%s -> %ju/%s\n", st->self->nfs_fd, st->old_dir_ino, st->old_name.c_str(), st->new_dir_ino, st->new_name.c_str());
if (!st->old_dir_ino || !st->new_dir_ino || st->old_name == "" || st->new_name == "")
{
RENAME3res *reply = (RENAME3res*)rop->reply;
*reply = (RENAME3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
delete st;
return 0;
}
if (st->old_dir_ino == st->new_dir_ino && st->old_name == st->new_name)
{
RENAME3res *reply = (RENAME3res*)rop->reply;
*reply = (RENAME3res){ .status = NFS3_OK };
rpc_queue_reply(st->rop);
delete st;
return 0;
}
st->cb = [st](int res)
{
RENAME3res *reply = (RENAME3res*)st->rop->reply;
*reply = (RENAME3res){ .status = vitastor_nfs_map_err(res) };
rpc_queue_reply(st->rop);
delete st;
};
nfs_kv_continue_rename(st, 0);
return 1;
}

187
src/nfs_kv_setattr.cpp Normal file
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@ -0,0 +1,187 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - SETATTR
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
struct nfs_kv_setattr_state
{
nfs_client_t *self = NULL;
rpc_op_t *rop = NULL;
uint64_t ino = 0;
uint64_t old_size = 0, new_size = 0;
json11::Json::object set_attrs;
int res = 0, cas_res = 0;
std::string ientry_text;
json11::Json ientry;
json11::Json::object new_attrs;
std::function<void(int)> cb;
};
static void nfs_kv_continue_setattr(nfs_kv_setattr_state *st, int state)
{
if (state == 0) {}
else if (state == 1) goto resume_1;
else if (state == 2) goto resume_2;
else if (state == 3) goto resume_3;
else
{
fprintf(stderr, "BUG: invalid state in nfs_kv_continue_setattr()");
abort();
}
resume_0:
kv_read_inode(st->self, st->ino, [st](int res, const std::string & value, json11::Json attrs)
{
st->res = res;
st->ientry_text = value;
st->ientry = attrs;
nfs_kv_continue_setattr(st, 1);
});
return;
resume_1:
if (st->res < 0)
{
auto cb = std::move(st->cb);
cb(st->res);
return;
}
if (st->ientry["type"].string_value() == "link" ||
st->ientry["type"].string_value() != "file" &&
st->ientry["type"].string_value() != "" &&
!st->set_attrs["size"].is_null())
{
auto cb = std::move(st->cb);
cb(-EINVAL);
return;
}
// Now we can update it
st->new_attrs = st->ientry.object_items();
st->old_size = st->ientry["size"].uint64_value();
for (auto & kv: st->set_attrs)
{
if (kv.first == "size")
{
st->new_size = kv.second.uint64_value();
}
st->new_attrs[kv.first] = kv.second;
}
st->self->parent->db->set(kv_inode_key(st->ino), json11::Json(st->new_attrs).dump(), [st](int res)
{
st->res = res;
nfs_kv_continue_setattr(st, 2);
}, [st](int res, const std::string & cas_value)
{
st->cas_res = res;
return (res == 0 || res == -ENOENT && st->ino == KV_ROOT_INODE) && cas_value == st->ientry_text;
});
return;
resume_2:
if (st->cas_res == -ENOENT)
{
st->res = -ENOENT;
}
if (st->res == -EAGAIN)
{
// Retry
fprintf(stderr, "CAS failure during setattr, retrying\n");
goto resume_0;
}
if (st->res < 0)
{
fprintf(stderr, "Failed to update inode %ju: %s (code %d)\n", st->ino, strerror(-st->res), st->res);
auto cb = std::move(st->cb);
cb(st->res);
return;
}
if (!st->set_attrs["size"].is_null() &&
st->ientry["size"].uint64_value() > st->set_attrs["size"].uint64_value())
{
// Delete extra data when downsizing
st->self->parent->cmd->loop_and_wait(st->self->parent->cmd->start_rm_data(json11::Json::object {
{ "inode", INODE_NO_POOL(st->self->parent->fs_base_inode + st->ino) },
{ "pool", (uint64_t)INODE_POOL(st->self->parent->fs_base_inode + st->ino) },
{ "min_offset", st->set_attrs["size"].uint64_value() },
}), [st](const cli_result_t & r)
{
if (r.err)
{
fprintf(stderr, "Failed to truncate inode %ju: %s (code %d)\n",
st->ino, r.text.c_str(), r.err);
}
st->res = r.err;
nfs_kv_continue_setattr(st, 3);
});
return;
}
resume_3:
auto cb = std::move(st->cb);
cb(0);
}
int kv_nfs3_setattr_proc(void *opaque, rpc_op_t *rop)
{
nfs_kv_setattr_state *st = new nfs_kv_setattr_state;
st->self = (nfs_client_t*)opaque;
st->rop = rop;
auto args = (SETATTR3args*)rop->request;
auto reply = (SETATTR3res*)rop->reply;
std::string fh = args->object;
if (!kv_fh_valid(fh))
{
*reply = (SETATTR3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
delete st;
return 0;
}
st->ino = kv_fh_inode(fh);
if (args->new_attributes.size.set_it)
st->set_attrs["size"] = args->new_attributes.size.size;
if (args->new_attributes.mode.set_it)
st->set_attrs["mode"] = (uint64_t)args->new_attributes.mode.mode;
if (args->new_attributes.uid.set_it)
st->set_attrs["uid"] = (uint64_t)args->new_attributes.uid.uid;
if (args->new_attributes.gid.set_it)
st->set_attrs["gid"] = (uint64_t)args->new_attributes.gid.gid;
if (args->new_attributes.atime.set_it)
st->set_attrs["atime"] = nfstime_to_str(args->new_attributes.atime.atime);
if (args->new_attributes.mtime.set_it)
st->set_attrs["mtime"] = nfstime_to_str(args->new_attributes.mtime.mtime);
fprintf(stderr, "SETATTR %ju ATTRS %s\n", st->ino, json11::Json(st->set_attrs).dump().c_str());
st->cb = [st](int res)
{
auto reply = (SETATTR3res*)st->rop->reply;
if (res < 0)
{
*reply = (SETATTR3res){
.status = vitastor_nfs_map_err(res),
};
}
else
{
*reply = (SETATTR3res){
.status = NFS3_OK,
.resok = (SETATTR3resok){
.obj_wcc = (wcc_data){
.after = (post_op_attr){
.attributes_follow = 1,
.attributes = get_kv_attributes(st->self, st->ino, st->new_attrs),
},
},
},
};
}
rpc_queue_reply(st->rop);
delete st;
};
nfs_kv_continue_setattr(st, 0);
return 1;
}

266
src/nfs_kv_write.cpp Normal file
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@ -0,0 +1,266 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy over VitastorKV database - WRITE
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
static void nfs_resize_write(nfs_client_t *self, rpc_op_t *rop, uint64_t inode, uint64_t new_size, uint64_t offset, uint64_t count, void *buf);
int kv_nfs3_write_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
WRITE3args *args = (WRITE3args*)rop->request;
WRITE3res *reply = (WRITE3res*)rop->reply;
inode_t ino = kv_fh_inode(args->file);
if (!ino)
{
*reply = (WRITE3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
return 0;
}
if (args->count > MAX_REQUEST_SIZE)
{
*reply = (WRITE3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
return 0;
}
uint64_t count = args->count > args->data.size ? args->data.size : args->count;
uint64_t alignment = self->parent->cli->st_cli.global_bitmap_granularity;
auto pool_cfg = self->parent->cli->st_cli.pool_config.find(INODE_POOL(self->parent->fs_base_inode));
if (pool_cfg != self->parent->cli->st_cli.pool_config.end())
{
alignment = pool_cfg->second.bitmap_granularity;
}
// Pre-fill reply
*reply = (WRITE3res){
.status = NFS3_OK,
.resok = (WRITE3resok){
//.file_wcc = ...,
.count = (unsigned)count,
},
};
if ((args->offset % alignment) != 0 || (count % alignment) != 0)
{
// Unaligned write, requires read-modify-write
uint64_t aligned_offset = args->offset - (args->offset % alignment);
uint64_t aligned_count = args->offset + args->count;
if (aligned_count % alignment)
aligned_count = aligned_count + alignment - (aligned_count % alignment);
aligned_count -= aligned_offset;
void *buf = malloc_or_die(aligned_count);
xdr_add_malloc(rop->xdrs, buf);
// Read
cluster_op_t *op = new cluster_op_t;
op->opcode = OSD_OP_READ;
op->inode = self->parent->fs_base_inode + ino;
op->offset = aligned_offset;
op->len = aligned_count;
op->iov.push_back(buf, aligned_count);
op->callback = [self, rop, count](cluster_op_t *op)
{
if (op->retval != op->len)
{
WRITE3res *reply = (WRITE3res*)rop->reply;
*reply = (WRITE3res){ .status = vitastor_nfs_map_err(-op->retval) };
rpc_queue_reply(rop);
return;
}
void *buf = op->iov.buf[0].iov_base;
WRITE3args *args = (WRITE3args*)rop->request;
memcpy((uint8_t*)buf + args->offset - op->offset, args->data.data, count);
nfs_resize_write(self, rop, op->inode, args->offset+count, op->offset, op->len, buf);
delete op;
};
self->parent->cli->execute(op);
}
else
{
nfs_resize_write(self, rop, ino, args->offset+count, args->offset, count, args->data.data);
}
return 1;
}
static void complete_extend_write(nfs_client_t *self, rpc_op_t *rop, inode_t inode, int res)
{
WRITE3args *args = (WRITE3args*)rop->request;
WRITE3res *reply = (WRITE3res*)rop->reply;
if (res < 0)
{
*reply = (WRITE3res){ .status = vitastor_nfs_map_err(res) };
rpc_queue_reply(rop);
return;
}
bool imm = self->parent->cli->get_immediate_commit(inode);
reply->resok.committed = args->stable != UNSTABLE || imm ? FILE_SYNC : UNSTABLE;
*(uint64_t*)reply->resok.verf = self->parent->server_id;
if (args->stable != UNSTABLE && !imm)
{
// Client requested a stable write. Add an fsync
auto op = new cluster_op_t;
op->opcode = OSD_OP_SYNC;
op->callback = [rop](cluster_op_t *op)
{
if (op->retval != 0)
{
WRITE3res *reply = (WRITE3res*)rop->reply;
*reply = (WRITE3res){ .status = vitastor_nfs_map_err(-op->retval) };
}
delete op;
rpc_queue_reply(rop);
};
self->parent->cli->execute(op);
}
else
{
rpc_queue_reply(rop);
}
}
static void complete_extend_inode(nfs_client_t *self, uint64_t inode, uint64_t new_size, int err)
{
auto ext_it = self->extend_writes.lower_bound((extend_size_t){ .inode = inode, .new_size = 0 });
while (ext_it != self->extend_writes.end() &&
ext_it->first.inode == inode &&
ext_it->first.new_size <= new_size)
{
ext_it->second.resize_res = err;
if (ext_it->second.write_res <= 0)
{
complete_extend_write(self, ext_it->second.rop, inode, ext_it->second.write_res < 0
? ext_it->second.write_res : ext_it->second.resize_res);
self->extend_writes.erase(ext_it++);
}
else
ext_it++;
}
}
static void extend_inode(nfs_client_t *self, uint64_t inode)
{
// Send an extend request
auto ext = &self->extends[inode];
self->parent->db->set(kv_inode_key(inode), json11::Json(ext->attrs).dump().c_str(), [=](int res)
{
if (res < 0 && res != -EAGAIN)
{
fprintf(stderr, "Error extending inode %ju to %ju bytes: %s (code %d)\n", inode, ext->cur_extend, strerror(-res), res);
}
if (res == -EAGAIN || ext->next_extend > ext->cur_extend)
{
// Multiple concurrent resize requests received, try to repeat
kv_read_inode(self, inode, [=](int res, const std::string & value, json11::Json attrs)
{
auto new_size = ext->next_extend > ext->cur_extend ? ext->next_extend : ext->cur_extend;
if (res == 0 && attrs["size"].uint64_value() < new_size)
{
ext->old_ientry = value;
ext->attrs = attrs.object_items();
ext->cur_extend = new_size;
ext->attrs["size"] = new_size;
extend_inode(self, inode);
}
else
{
if (res < 0)
{
fprintf(stderr, "Error extending inode %ju to %ju bytes: %s (code %d)\n", inode, ext->cur_extend, strerror(-res), res);
}
ext->cur_extend = ext->next_extend = 0;
complete_extend_inode(self, inode, attrs["size"].uint64_value(), res);
}
});
return;
}
auto new_size = ext->cur_extend;
ext->cur_extend = ext->next_extend = 0;
complete_extend_inode(self, inode, new_size, res);
});
}
static void nfs_do_write(nfs_client_t *self, std::multimap<extend_size_t, extend_write_t>::iterator ewr_it,
rpc_op_t *rop, uint64_t inode, uint64_t offset, uint64_t count, void *buf)
{
cluster_op_t *op = new cluster_op_t;
op->opcode = OSD_OP_WRITE;
op->inode = self->parent->fs_base_inode + inode;
op->offset = offset;
op->len = count;
op->iov.push_back(buf, count);
op->callback = [self, ewr_it, rop](cluster_op_t *op)
{
auto inode = op->inode;
int write_res = op->retval < 0 ? op->retval : (op->retval != op->len ? -ERANGE : 0);
if (ewr_it == self->extend_writes.end())
{
complete_extend_write(self, rop, inode, write_res);
}
else
{
ewr_it->second.write_res = write_res;
if (ewr_it->second.resize_res <= 0)
{
complete_extend_write(self, rop, inode, write_res < 0 ? write_res : ewr_it->second.resize_res);
self->extend_writes.erase(ewr_it);
}
}
};
self->parent->cli->execute(op);
}
static void nfs_resize_write(nfs_client_t *self, rpc_op_t *rop, uint64_t inode, uint64_t new_size, uint64_t offset, uint64_t count, void *buf)
{
// Check if we have to resize the inode during write
kv_read_inode(self, inode, [=](int res, const std::string & value, json11::Json attrs)
{
if (res < 0)
{
*(WRITE3res*)rop->reply = (WRITE3res){ .status = vitastor_nfs_map_err(-res) };
rpc_queue_reply(rop);
}
else if (kv_map_type(attrs["type"].string_value()) != NF3REG)
{
*(WRITE3res*)rop->reply = (WRITE3res){ .status = NFS3ERR_INVAL };
rpc_queue_reply(rop);
}
else if (attrs["size"].uint64_value() < new_size)
{
auto ewr_it = self->extend_writes.emplace((extend_size_t){
.inode = inode,
.new_size = new_size,
}, (extend_write_t){
.rop = rop,
.resize_res = 1,
.write_res = 1,
});
auto ext = &self->extends[inode];
if (ext->cur_extend > 0)
{
// Already resizing, just wait
if (ext->next_extend < new_size)
ext->next_extend = new_size;
}
else
{
ext->old_ientry = value;
ext->attrs = attrs.object_items();
ext->cur_extend = new_size;
ext->attrs["size"] = new_size;
extend_inode(self, inode);
}
nfs_do_write(self, ewr_it, rop, inode, offset, count, buf);
}
else
{
nfs_do_write(self, self->extend_writes.end(), rop, inode, offset, count, buf);
}
});
}

115
src/nfs_mount.cpp Normal file
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@ -0,0 +1,115 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
//
// NFS proxy - common NULL, ACCESS, COMMIT, DUMP, EXPORT, MNT, UMNT, UMNTALL
#include <sys/time.h>
#include "str_util.h"
#include "nfs_proxy.h"
#include "nfs/nfs.h"
#include "cli.h"
int nfs3_null_proc(void *opaque, rpc_op_t *rop)
{
rpc_queue_reply(rop);
return 0;
}
int nfs3_access_proc(void *opaque, rpc_op_t *rop)
{
//nfs_client_t *self = (nfs_client_t*)opaque;
ACCESS3args *args = (ACCESS3args*)rop->request;
ACCESS3res *reply = (ACCESS3res*)rop->reply;
*reply = (ACCESS3res){
.status = NFS3_OK,
.resok = (ACCESS3resok){
.access = args->access,
},
};
rpc_queue_reply(rop);
return 0;
}
int nfs3_commit_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
//COMMIT3args *args = (COMMIT3args*)rop->request;
cluster_op_t *op = new cluster_op_t;
// fsync. we don't know how to fsync a single inode, so just fsync everything
op->opcode = OSD_OP_SYNC;
op->callback = [self, rop](cluster_op_t *op)
{
COMMIT3res *reply = (COMMIT3res*)rop->reply;
*reply = (COMMIT3res){ .status = vitastor_nfs_map_err(op->retval) };
*(uint64_t*)reply->resok.verf = self->parent->server_id;
rpc_queue_reply(rop);
};
self->parent->cli->execute(op);
return 1;
}
int mount3_mnt_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
//nfs_dirpath *args = (nfs_dirpath*)rop->request;
if (self->parent->trace)
fprintf(stderr, "[%d] MNT\n", self->nfs_fd);
nfs_mountres3 *reply = (nfs_mountres3*)rop->reply;
u_int flavor = RPC_AUTH_NONE;
reply->fhs_status = MNT3_OK;
reply->mountinfo.fhandle = xdr_copy_string(rop->xdrs, KV_ROOT_HANDLE);
reply->mountinfo.auth_flavors.auth_flavors_len = 1;
reply->mountinfo.auth_flavors.auth_flavors_val = (u_int*)xdr_copy_string(rop->xdrs, (char*)&flavor, sizeof(u_int)).data;
rpc_queue_reply(rop);
return 0;
}
int mount3_dump_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
if (self->parent->trace)
fprintf(stderr, "[%d] DUMP\n", self->nfs_fd);
nfs_mountlist *reply = (nfs_mountlist*)rop->reply;
*reply = (struct nfs_mountbody*)malloc_or_die(sizeof(struct nfs_mountbody));
xdr_add_malloc(rop->xdrs, *reply);
(*reply)->ml_hostname = xdr_copy_string(rop->xdrs, "127.0.0.1");
(*reply)->ml_directory = xdr_copy_string(rop->xdrs, self->parent->export_root);
(*reply)->ml_next = NULL;
rpc_queue_reply(rop);
return 0;
}
int mount3_umnt_proc(void *opaque, rpc_op_t *rop)
{
//nfs_client_t *self = (nfs_client_t*)opaque;
//nfs_dirpath *arg = (nfs_dirpath*)rop->request;
// do nothing
rpc_queue_reply(rop);
return 0;
}
int mount3_umntall_proc(void *opaque, rpc_op_t *rop)
{
// do nothing
rpc_queue_reply(rop);
return 0;
}
int mount3_export_proc(void *opaque, rpc_op_t *rop)
{
nfs_client_t *self = (nfs_client_t*)opaque;
nfs_exports *reply = (nfs_exports*)rop->reply;
*reply = (struct nfs_exportnode*)calloc_or_die(1, sizeof(struct nfs_exportnode) + sizeof(struct nfs_groupnode));
xdr_add_malloc(rop->xdrs, *reply);
(*reply)->ex_dir = xdr_copy_string(rop->xdrs, self->parent->export_root);
(*reply)->ex_groups = (struct nfs_groupnode*)(reply+1);
(*reply)->ex_groups->gr_name = xdr_copy_string(rop->xdrs, "127.0.0.1");
(*reply)->ex_groups->gr_next = NULL;
(*reply)->ex_next = NULL;
rpc_queue_reply(rop);
return 0;
}

54
src/nfs_proxy.h
View File

@ -7,6 +7,9 @@
#include "kv_db.h"
#define RPC_INIT_BUF_SIZE 32768
#define MAX_REQUEST_SIZE 128*1024*1024
#define TRUE 1
#define FALSE 0
class cli_tool_t;
@ -156,3 +159,54 @@ public:
bool deref();
void stop();
};
// FIXME: Move to "impl"
#include "nfs/nfs.h"
#define KV_ROOT_INODE 1
#define KV_NEXT_ID_KEY "id"
#define KV_ROOT_HANDLE "R"
nfsstat3 vitastor_nfs_map_err(int err);
nfstime3 nfstime_from_str(const std::string & s);
std::string nfstime_to_str(nfstime3 t);
int kv_map_type(const std::string & type);
fattr3 get_kv_attributes(nfs_client_t *self, uint64_t ino, json11::Json attrs);
std::string kv_direntry_key(uint64_t dir_ino, const std::string & filename);
std::string kv_direntry_filename(const std::string & key);
std::string kv_inode_key(uint64_t ino);
std::string kv_fh(uint64_t ino);
uint64_t kv_fh_inode(const std::string & fh);
bool kv_fh_valid(const std::string & fh);
void allocate_new_id(nfs_client_t *self, std::function<void(int res, uint64_t new_id)> cb);
void kv_read_inode(nfs_client_t *self, uint64_t ino,
std::function<void(int res, const std::string & value, json11::Json ientry)> cb,
bool allow_cache = false);
int kv_nfs3_getattr_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_setattr_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_lookup_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_readlink_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_read_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_write_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_create_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_mkdir_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_symlink_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_mknod_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_remove_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_rmdir_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_rename_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_link_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_readdir_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_readdirplus_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_fsstat_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_fsinfo_proc(void *opaque, rpc_op_t *rop);
int kv_nfs3_pathconf_proc(void *opaque, rpc_op_t *rop);
int nfs3_access_proc(void *opaque, rpc_op_t *rop);
int nfs3_null_proc(void *opaque, rpc_op_t *rop);
int nfs3_commit_proc(void *opaque, rpc_op_t *rop);
int mount3_mnt_proc(void *opaque, rpc_op_t *rop);
int mount3_dump_proc(void *opaque, rpc_op_t *rop);
int mount3_umnt_proc(void *opaque, rpc_op_t *rop);
int mount3_umntall_proc(void *opaque, rpc_op_t *rop);
int mount3_export_proc(void *opaque, rpc_op_t *rop);