/**
* @brief Callback for NFS3 write done
*
* @param[in] obj Object being acted on
* @param[in] ret Return status of call
* @param[in] write_data Data for write call
* @param[in] caller_data Data for caller
*/
static void _9p_write_cb(struct fsal_obj_handle *obj, fsal_status_t ret,
void *write_data, void *caller_data)
{
struct _9p_write_data *data = caller_data;
struct fsal_io_arg *write_arg = write_data;
/* Fixup ERR_FSAL_SHARE_DENIED status */
if (ret.major == ERR_FSAL_SHARE_DENIED)
ret = fsalstat(ERR_FSAL_LOCKED, 0);
data->ret = ret;
if (data->client) {
op_ctx->client = data->client;
server_stats_io_done(write_arg->iov[0].iov_len,
write_arg->io_amount, FSAL_IS_ERROR(ret),
false);
}
}
int _9p_read(struct _9p_request_data *req9p, u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
char *databuffer;
u16 *msgtag = NULL;
u32 *fid = NULL;
u64 *offset = NULL;
u32 *count = NULL;
u32 outcount = 0;
struct _9p_fid *pfid = NULL;
size_t read_size = 0;
bool eof_met;
fsal_status_t fsal_status;
/* uint64_t stable_flag = CACHE_INODE_SAFE_WRITE_TO_FS; */
bool sync = false;
/* Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, fid, u32);
_9p_getptr(cursor, offset, u64);
_9p_getptr(cursor, count, u32);
LogDebug(COMPONENT_9P, "TREAD: tag=%u fid=%u offset=%llu count=%u",
(u32) *msgtag, *fid, (unsigned long long)*offset, *count);
if (*fid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, msgtag, ERANGE, plenout, preply);
pfid = req9p->pconn->fids[*fid];
/* Make sure the requested amount of data respects negotiated msize */
if (*count + _9P_ROOM_RREAD > req9p->pconn->msize)
return _9p_rerror(req9p, msgtag, ERANGE, plenout, preply);
/* Check that it is a valid fid */
if (pfid == NULL || pfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *fid);
return _9p_rerror(req9p, msgtag, EIO, plenout, preply);
}
_9p_init_opctx(pfid, req9p);
/* Start building the reply already
* So we don't need to use an intermediate data buffer
*/
_9p_setinitptr(cursor, preply, _9P_RREAD);
_9p_setptr(cursor, msgtag, u16);
databuffer = _9p_getbuffertofill(cursor);
/* Do the job */
if (pfid->xattr != NULL) {
/* Copy the value cached during xattrwalk */
if (*offset > pfid->xattr->xattr_size)
return _9p_rerror(req9p, msgtag, EINVAL, plenout,
preply);
if (pfid->xattr->xattr_write != _9P_XATTR_READ_ONLY)
return _9p_rerror(req9p, msgtag, EINVAL, plenout,
preply);
read_size = MIN(*count,
pfid->xattr->xattr_size - *offset);
memcpy(databuffer,
pfid->xattr->xattr_content + *offset,
read_size);
outcount = read_size;
} else {
if (pfid->pentry->fsal->m_ops.support_ex(pfid->pentry)) {
/* Call the new fsal_read */
fsal_status = fsal_read2(pfid->pentry,
false,
pfid->state,
*offset,
*count,
&read_size,
databuffer,
&eof_met,
NULL);
} else {
/* Call legacy fsal_rdwr */
fsal_status = fsal_rdwr(pfid->pentry,
FSAL_IO_READ,
*offset,
*count,
&read_size,
databuffer,
&eof_met,
&sync,
NULL);
}
/* Get the handle, for stats */
struct gsh_client *client = req9p->pconn->client;
if (client == NULL) {
LogDebug(COMPONENT_9P,
"Cannot get client block for 9P request");
} else {
op_ctx->client = client;
server_stats_io_done(*count, read_size,
FSAL_IS_ERROR(fsal_status), false);
}
if (FSAL_IS_ERROR(fsal_status))
return _9p_rerror(req9p, msgtag,
_9p_tools_errno(fsal_status),
plenout, preply);
outcount = (u32) read_size;
}
_9p_setfilledbuffer(cursor, outcount);
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P, "RREAD: tag=%u fid=%u offset=%llu count=%u",
(u32) *msgtag, *fid, (unsigned long long)*offset, *count);
/**
* @todo read statistics accounting goes here
* modeled on nfs I/O statistics
*/
return 1;
}
int _9p_write(struct _9p_request_data *req9p, u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
u16 *msgtag = NULL;
u32 *fid = NULL;
u64 *offset = NULL;
u32 *count = NULL;
u32 outcount = 0;
struct _9p_fid *pfid = NULL;
size_t size;
size_t written_size = 0;
bool eof_met;
cache_inode_status_t cache_status = CACHE_INODE_SUCCESS;
/* bool sync = true; */
bool sync = false;
char *databuffer = NULL;
/* fsal_status_t fsal_status; */
/* Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, fid, u32);
_9p_getptr(cursor, offset, u64);
_9p_getptr(cursor, count, u32);
databuffer = cursor;
LogDebug(COMPONENT_9P, "TWRITE: tag=%u fid=%u offset=%llu count=%u",
(u32) *msgtag, *fid, (unsigned long long)*offset, *count);
if (*fid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, msgtag, ERANGE, plenout, preply);
pfid = req9p->pconn->fids[*fid];
/* Make sure the requested amount of data respects negotiated msize */
if (*count + _9P_ROOM_TWRITE > req9p->pconn->msize)
return _9p_rerror(req9p, msgtag, ERANGE, plenout, preply);
/* Check that it is a valid fid */
if (pfid == NULL || pfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *fid);
return _9p_rerror(req9p, msgtag, EIO, plenout, preply);
}
_9p_init_opctx(pfid, req9p);
if ((op_ctx->export_perms->options &
EXPORT_OPTION_WRITE_ACCESS) == 0)
return _9p_rerror(req9p, msgtag, EROFS, plenout, preply);
/* Do the job */
size = *count;
if (pfid->specdata.xattr.xattr_content != NULL) {
memcpy(pfid->specdata.xattr.xattr_content + (*offset),
databuffer, size);
pfid->specdata.xattr.xattr_offset += size;
pfid->specdata.xattr.xattr_write = true;
/* ADD CODE TO DETECT GAP */
#if 0
fsal_status =
pfid->pentry->obj_handle->ops->setextattr_value_by_id(
pfid->pentry->obj_handle,
&pfid->op_context,
pfid->specdata.xattr.xattr_id,
xattrval, size + 1);
if (FSAL_IS_ERROR(fsal_status))
return _9p_rerror(req9p, msgtag,
_9p_tools_errno
(cache_inode_error_convert
(fsal_status)), plenout, preply);
#endif
outcount = *count;
} else {
cache_status = cache_inode_rdwr(pfid->pentry, CACHE_INODE_WRITE,
*offset, size, &written_size,
databuffer, &eof_met, &sync,
NULL);
/* Get the handle, for stats */
struct gsh_client *client = req9p->pconn->client;
if (client == NULL) {
LogDebug(COMPONENT_9P,
"Cannot get client block for 9P request");
} else {
op_ctx->client = client;
server_stats_io_done(size,
written_size,
(cache_status ==
CACHE_INODE_SUCCESS) ?
true : false,
true);
}
if (cache_status != CACHE_INODE_SUCCESS)
return _9p_rerror(req9p, msgtag,
_9p_tools_errno(cache_status),
plenout, preply);
outcount = (u32) written_size;
}
/* Build the reply */
_9p_setinitptr(cursor, preply, _9P_RWRITE);
_9p_setptr(cursor, msgtag, u16);
_9p_setvalue(cursor, outcount, u32);
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P,
"RWRITE: tag=%u fid=%u offset=%llu input count=%u output count=%u",
(u32) *msgtag, *fid, (unsigned long long)*offset, *count,
outcount);
/**
* @todo write statistics accounting goes here
* modeled on nfs I/O stats
*/
return 1;
}
static int nfs4_read(struct nfs_argop4 *op, compound_data_t *data,
struct nfs_resop4 *resp, fsal_io_direction_t io,
struct io_info *info)
{
READ4args * const arg_READ4 = &op->nfs_argop4_u.opread;
READ4res * const res_READ4 = &resp->nfs_resop4_u.opread;
uint64_t size = 0;
size_t read_size = 0;
uint64_t offset = 0;
bool eof_met = false;
void *bufferdata = NULL;
fsal_status_t fsal_status = {0, 0};
state_t *state_found = NULL;
state_t *state_open = NULL;
struct fsal_obj_handle *obj = NULL;
bool sync = false;
bool anonymous_started = false;
state_owner_t *owner = NULL;
bool bypass = false;
uint64_t MaxRead = atomic_fetch_uint64_t(&op_ctx->ctx_export->MaxRead);
uint64_t MaxOffsetRead =
atomic_fetch_uint64_t(
&op_ctx->ctx_export->MaxOffsetRead);
/* Say we are managing NFS4_OP_READ */
resp->resop = NFS4_OP_READ;
res_READ4->status = NFS4_OK;
/* Do basic checks on a filehandle Only files can be read */
if ((data->minorversion > 0)
&& nfs4_Is_Fh_DSHandle(&data->currentFH)) {
if (io == FSAL_IO_READ)
return op_dsread(op, data, resp);
else
return op_dsread_plus(op, data, resp, info);
}
res_READ4->status = nfs4_sanity_check_FH(data, REGULAR_FILE, true);
if (res_READ4->status != NFS4_OK)
return res_READ4->status;
obj = data->current_obj;
/* Check stateid correctness and get pointer to state (also
checks for special stateids) */
res_READ4->status =
nfs4_Check_Stateid(&arg_READ4->stateid, obj, &state_found, data,
STATEID_SPECIAL_ANY, 0, false, "READ");
if (res_READ4->status != NFS4_OK)
return res_READ4->status;
/* NB: After this point, if state_found == NULL, then the
stateid is all-0 or all-1 */
if (state_found != NULL) {
struct state_deleg *sdeleg;
if (info)
info->io_advise = state_found->state_data.io_advise;
switch (state_found->state_type) {
case STATE_TYPE_SHARE:
state_open = state_found;
/* Note this causes an extra refcount, but it
* simplifies logic below.
*/
inc_state_t_ref(state_open);
/**
* @todo FSF: need to check against existing locks
*/
break;
case STATE_TYPE_LOCK:
state_open = state_found->state_data.lock.openstate;
inc_state_t_ref(state_open);
/**
* @todo FSF: should check that write is in
* range of an byte range lock...
*/
break;
case STATE_TYPE_DELEG:
/* Check if the delegation state allows READ */
sdeleg = &state_found->state_data.deleg;
if (!(sdeleg->sd_type & OPEN_DELEGATE_READ) ||
(sdeleg->sd_state != DELEG_GRANTED)) {
/* Invalid delegation for this operation. */
LogDebug(COMPONENT_STATE,
"Delegation type:%d state:%d",
sdeleg->sd_type,
sdeleg->sd_state);
res_READ4->status = NFS4ERR_BAD_STATEID;
goto out;
}
state_open = NULL;
break;
default:
res_READ4->status = NFS4ERR_BAD_STATEID;
LogDebug(COMPONENT_NFS_V4_LOCK,
"READ with invalid statid of type %d",
state_found->state_type);
goto out;
}
/* This is a read operation, this means that the file
MUST have been opened for reading */
if (state_open != NULL
&& (state_open->state_data.share.
share_access & OPEN4_SHARE_ACCESS_READ) == 0) {
/* Even if file is open for write, the client
* may do accidently read operation (caching).
* Because of this, READ is allowed if not
* explicitly denied. See page 112 in RFC 7530
* for more details.
*/
if (state_open->state_data.share.
share_deny & OPEN4_SHARE_DENY_READ) {
/* Bad open mode, return NFS4ERR_OPENMODE */
res_READ4->status = NFS4ERR_OPENMODE;
if (isDebug(COMPONENT_NFS_V4_LOCK)) {
char str[LOG_BUFF_LEN] = "\0";
struct display_buffer dspbuf = {
sizeof(str), str, str};
display_stateid(&dspbuf, state_found);
LogDebug(COMPONENT_NFS_V4_LOCK,
"READ %s doesn't have OPEN4_SHARE_ACCESS_READ",
str);
}
goto out;
}
}
/**
* @todo : this piece of code looks a bit suspicious
* (see Rong's mail)
*
* @todo: ACE: This works for now. How do we want to
* handle owner confirmation across NFSv4.0/NFSv4.1?
* Do we want to mark every NFSv4.1 owner
* pre-confirmed, or make the check conditional on
* minorversion like we do here?
*/
switch (state_found->state_type) {
case STATE_TYPE_SHARE:
if (data->minorversion == 0 &&
!state_owner_confirmed(state_found)) {
res_READ4->status = NFS4ERR_BAD_STATEID;
goto out;
}
break;
case STATE_TYPE_LOCK:
case STATE_TYPE_DELEG:
break;
default:
/* Sanity check: all other types are illegal.
* we should not got that place (similar check
* above), anyway it costs nothing to add this
* test */
res_READ4->status = NFS4ERR_BAD_STATEID;
goto out;
}
} else {
/* Special stateid, no open state, check to see if any
share conflicts */
state_open = NULL;
/* Special stateid, no open state, check to see if any share
* conflicts The stateid is all-0 or all-1
*/
bypass = arg_READ4->stateid.seqid != 0;
res_READ4->status = nfs4_Errno_state(
state_share_anonymous_io_start(
obj,
OPEN4_SHARE_ACCESS_READ,
arg_READ4->stateid.seqid != 0
? SHARE_BYPASS_READ
: SHARE_BYPASS_NONE));
if (res_READ4->status != NFS4_OK)
goto out;
anonymous_started = true;
}
/* Need to permission check the read. */
fsal_status = obj->obj_ops.test_access(obj, FSAL_READ_ACCESS,
NULL, NULL, true);
if (fsal_status.major == ERR_FSAL_ACCESS) {
/* Test for execute permission */
fsal_status = fsal_access(obj,
FSAL_MODE_MASK_SET(FSAL_X_OK) |
FSAL_ACE4_MASK_SET
(FSAL_ACE_PERM_EXECUTE));
}
if (FSAL_IS_ERROR(fsal_status)) {
res_READ4->status = nfs4_Errno_status(fsal_status);
goto done;
}
/* Get the size and offset of the read operation */
offset = arg_READ4->offset;
size = arg_READ4->count;
if (MaxOffsetRead < UINT64_MAX) {
LogFullDebug(COMPONENT_NFS_V4,
"Read offset=%" PRIu64
" size=%" PRIu64 " MaxOffSet=%" PRIu64,
offset, size,
MaxOffsetRead);
if ((offset + size) > MaxOffsetRead) {
LogEvent(COMPONENT_NFS_V4,
"A client tryed to violate max file size %"
PRIu64 " for exportid #%hu",
MaxOffsetRead,
op_ctx->ctx_export->export_id);
res_READ4->status = NFS4ERR_FBIG;
goto done;
}
}
if (size > MaxRead) {
/* the client asked for too much data, this should normally
not happen because client will get FATTR4_MAXREAD value
at mount time */
if (info == NULL ||
info->io_content.what != NFS4_CONTENT_HOLE) {
LogFullDebug(COMPONENT_NFS_V4,
"read requested size = %"PRIu64
" read allowed size = %" PRIu64,
size, MaxRead);
size = MaxRead;
}
}
/* If size == 0, no I/O is to be made and everything is
alright */
if (size == 0) {
/* A size = 0 can not lead to EOF */
res_READ4->READ4res_u.resok4.eof = false;
res_READ4->READ4res_u.resok4.data.data_len = 0;
res_READ4->READ4res_u.resok4.data.data_val = NULL;
res_READ4->status = NFS4_OK;
goto done;
}
/* Some work is to be done */
bufferdata = gsh_malloc_aligned(4096, size);
if (!anonymous_started && data->minorversion == 0) {
owner = get_state_owner_ref(state_found);
if (owner != NULL) {
op_ctx->clientid =
&owner->so_owner.so_nfs4_owner.so_clientid;
}
}
if (obj->fsal->m_ops.support_ex(obj)) {
/* Call the new fsal_read2 */
fsal_status = fsal_read2(obj, bypass, state_found, offset, size,
&read_size, bufferdata, &eof_met,
info);
} else {
/* Call legacy fsal_rdwr */
fsal_status = fsal_rdwr(obj, io, offset, size, &read_size,
bufferdata, &eof_met, &sync, info);
}
if (FSAL_IS_ERROR(fsal_status)) {
res_READ4->status = nfs4_Errno_status(fsal_status);
gsh_free(bufferdata);
res_READ4->READ4res_u.resok4.data.data_val = NULL;
goto done;
}
if (!eof_met) {
/** @todo FSF: add a config option for this behavior?
*/
/* Need to check against filesize for ESXi clients */
struct attrlist attrs;
fsal_prepare_attrs(&attrs, ATTR_SIZE);
if (!FSAL_IS_ERROR(obj->obj_ops.getattrs(obj, &attrs)))
eof_met = (offset + read_size) >= attrs.filesize;
/* Done with the attrs */
fsal_release_attrs(&attrs);
}
if (!anonymous_started && data->minorversion == 0)
op_ctx->clientid = NULL;
res_READ4->READ4res_u.resok4.data.data_len = read_size;
res_READ4->READ4res_u.resok4.data.data_val = bufferdata;
LogFullDebug(COMPONENT_NFS_V4,
"NFS4_OP_READ: offset = %" PRIu64
" read length = %zu eof=%u", offset, read_size, eof_met);
/* Is EOF met or not ? */
res_READ4->READ4res_u.resok4.eof = eof_met;
/* Say it is ok */
res_READ4->status = NFS4_OK;
done:
if (anonymous_started)
state_share_anonymous_io_done(obj, OPEN4_SHARE_ACCESS_READ);
server_stats_io_done(size, read_size,
(res_READ4->status == NFS4_OK) ? true : false,
false);
out:
if (owner != NULL)
dec_state_owner_ref(owner);
if (state_found != NULL)
dec_state_t_ref(state_found);
if (state_open != NULL)
dec_state_t_ref(state_open);
return res_READ4->status;
} /* nfs4_op_read */
static int nfs4_write(struct nfs_argop4 *op, compound_data_t *data,
struct nfs_resop4 *resp, fsal_io_direction_t io,
struct io_info *info)
{
WRITE4args * const arg_WRITE4 = &op->nfs_argop4_u.opwrite;
WRITE4res * const res_WRITE4 = &resp->nfs_resop4_u.opwrite;
uint64_t size = 0;
size_t written_size = 0;
uint64_t offset;
bool eof_met;
bool sync = false;
void *bufferdata;
stable_how4 stable_how;
state_t *state_found = NULL;
state_t *state_open = NULL;
fsal_status_t fsal_status = {0, 0};
struct fsal_obj_handle *obj = NULL;
bool anonymous_started = false;
struct gsh_buffdesc verf_desc;
state_owner_t *owner = NULL;
uint64_t MaxWrite =
atomic_fetch_uint64_t(&op_ctx->ctx_export->MaxWrite);
uint64_t MaxOffsetWrite =
atomic_fetch_uint64_t(&op_ctx->ctx_export->MaxOffsetWrite);
/* Lock are not supported */
resp->resop = NFS4_OP_WRITE;
res_WRITE4->status = NFS4_OK;
if ((data->minorversion > 0)
&& (nfs4_Is_Fh_DSHandle(&data->currentFH))) {
if (io == FSAL_IO_WRITE)
return op_dswrite(op, data, resp);
else
return op_dswrite_plus(op, data, resp, info);
}
/*
* Do basic checks on a filehandle
* Only files can be written
*/
res_WRITE4->status = nfs4_sanity_check_FH(data, REGULAR_FILE, true);
if (res_WRITE4->status != NFS4_OK)
return res_WRITE4->status;
/* if quota support is active, then we should check is the FSAL
allows inode creation or not */
fsal_status = op_ctx->fsal_export->exp_ops.check_quota(
op_ctx->fsal_export,
op_ctx->ctx_export->fullpath,
FSAL_QUOTA_INODES);
if (FSAL_IS_ERROR(fsal_status)) {
res_WRITE4->status = NFS4ERR_DQUOT;
return res_WRITE4->status;
}
/* vnode to manage is the current one */
obj = data->current_obj;
/* Check stateid correctness and get pointer to state
* (also checks for special stateids)
*/
res_WRITE4->status = nfs4_Check_Stateid(&arg_WRITE4->stateid,
obj,
&state_found,
data,
STATEID_SPECIAL_ANY,
0,
false,
"WRITE");
if (res_WRITE4->status != NFS4_OK)
return res_WRITE4->status;
/* NB: After this points, if state_found == NULL, then
* the stateid is all-0 or all-1
*/
if (state_found != NULL) {
struct state_deleg *sdeleg;
if (info)
info->io_advise = state_found->state_data.io_advise;
switch (state_found->state_type) {
case STATE_TYPE_SHARE:
state_open = state_found;
/* Note this causes an extra refcount, but it
* simplifies logic below.
*/
inc_state_t_ref(state_open);
/** @todo FSF: need to check against existing locks */
break;
case STATE_TYPE_LOCK:
state_open = state_found->state_data.lock.openstate;
inc_state_t_ref(state_open);
/**
* @todo FSF: should check that write is in range of an
* exclusive lock...
*/
break;
case STATE_TYPE_DELEG:
/* Check if the delegation state allows READ */
sdeleg = &state_found->state_data.deleg;
if (!(sdeleg->sd_type & OPEN_DELEGATE_WRITE) ||
(sdeleg->sd_state != DELEG_GRANTED)) {
/* Invalid delegation for this operation. */
LogDebug(COMPONENT_STATE,
"Delegation type:%d state:%d",
sdeleg->sd_type,
sdeleg->sd_state);
res_WRITE4->status = NFS4ERR_BAD_STATEID;
return res_WRITE4->status;
}
state_open = NULL;
break;
case STATE_TYPE_LAYOUT:
state_open = NULL;
break;
default:
res_WRITE4->status = NFS4ERR_BAD_STATEID;
LogDebug(COMPONENT_NFS_V4_LOCK,
"WRITE with invalid stateid of type %d",
(int)state_found->state_type);
return res_WRITE4->status;
}
/* This is a write operation, this means that the file
* MUST have been opened for writing
*/
if (state_open != NULL &&
(state_open->state_data.share.share_access &
OPEN4_SHARE_ACCESS_WRITE) == 0) {
/* Bad open mode, return NFS4ERR_OPENMODE */
res_WRITE4->status = NFS4ERR_OPENMODE;
if (isDebug(COMPONENT_NFS_V4_LOCK)) {
char str[LOG_BUFF_LEN] = "\0";
struct display_buffer dspbuf = {
sizeof(str), str, str};
display_stateid(&dspbuf, state_found);
LogDebug(COMPONENT_NFS_V4_LOCK,
"WRITE %s doesn't have OPEN4_SHARE_ACCESS_WRITE",
str);
}
goto out;
}
} else {
/* Special stateid, no open state, check to see if any
* share conflicts
*/
state_open = NULL;
/* Special stateid, no open state, check to see if any share
* conflicts The stateid is all-0 or all-1
*/
res_WRITE4->status = nfs4_Errno_state(
state_share_anonymous_io_start(
obj,
OPEN4_SHARE_ACCESS_WRITE,
SHARE_BYPASS_NONE));
if (res_WRITE4->status != NFS4_OK)
goto out;
anonymous_started = true;
}
/* Need to permission check the write. */
fsal_status = obj->obj_ops.test_access(obj, FSAL_WRITE_ACCESS,
NULL, NULL, true);
if (FSAL_IS_ERROR(fsal_status)) {
res_WRITE4->status = nfs4_Errno_status(fsal_status);
goto done;
}
/* Get the characteristics of the I/O to be made */
offset = arg_WRITE4->offset;
size = arg_WRITE4->data.data_len;
stable_how = arg_WRITE4->stable;
LogFullDebug(COMPONENT_NFS_V4,
"offset = %" PRIu64 " length = %" PRIu64 " stable = %d",
offset, size, stable_how);
if (MaxOffsetWrite < UINT64_MAX) {
LogFullDebug(COMPONENT_NFS_V4,
"Write offset=%" PRIu64 " count=%" PRIu64
" MaxOffSet=%" PRIu64, offset, size,
MaxOffsetWrite);
if ((offset + size) > MaxOffsetWrite) {
LogEvent(COMPONENT_NFS_V4,
"A client tryed to violate max file size %"
PRIu64 " for exportid #%hu",
MaxOffsetWrite,
op_ctx->ctx_export->export_id);
res_WRITE4->status = NFS4ERR_FBIG;
goto done;
}
}
if (size > MaxWrite) {
/*
* The client asked for too much data, we
* must restrict him
*/
if (info == NULL ||
info->io_content.what != NFS4_CONTENT_HOLE) {
LogFullDebug(COMPONENT_NFS_V4,
"write requested size = %" PRIu64
" write allowed size = %" PRIu64,
size, MaxWrite);
size = MaxWrite;
}
}
/* Where are the data ? */
bufferdata = arg_WRITE4->data.data_val;
LogFullDebug(COMPONENT_NFS_V4,
"offset = %" PRIu64 " length = %" PRIu64,
offset, size);
/* if size == 0 , no I/O) are actually made and everything is alright */
if (size == 0) {
res_WRITE4->WRITE4res_u.resok4.count = 0;
res_WRITE4->WRITE4res_u.resok4.committed = FILE_SYNC4;
verf_desc.addr = res_WRITE4->WRITE4res_u.resok4.writeverf;
verf_desc.len = sizeof(verifier4);
op_ctx->fsal_export->exp_ops.get_write_verifier(
op_ctx->fsal_export, &verf_desc);
res_WRITE4->status = NFS4_OK;
goto done;
}
if (arg_WRITE4->stable == UNSTABLE4)
sync = false;
else
sync = true;
if (!anonymous_started && data->minorversion == 0) {
owner = get_state_owner_ref(state_found);
if (owner != NULL) {
op_ctx->clientid =
&owner->so_owner.so_nfs4_owner.so_clientid;
}
}
if (obj->fsal->m_ops.support_ex(obj)) {
/* Call the new fsal_write */
fsal_status = fsal_write2(obj, false, state_found, offset, size,
&written_size, bufferdata, &sync,
info);
} else {
/* Call legacy fsal_rdwr */
fsal_status = fsal_rdwr(obj, io, offset, size, &written_size,
bufferdata, &eof_met, &sync, info);
}
if (FSAL_IS_ERROR(fsal_status)) {
LogDebug(COMPONENT_NFS_V4, "write returned %s",
fsal_err_txt(fsal_status));
res_WRITE4->status = nfs4_Errno_status(fsal_status);
goto done;
}
if (!anonymous_started && data->minorversion == 0)
op_ctx->clientid = NULL;
/* Set the returned value */
if (sync)
res_WRITE4->WRITE4res_u.resok4.committed = FILE_SYNC4;
else
res_WRITE4->WRITE4res_u.resok4.committed = UNSTABLE4;
res_WRITE4->WRITE4res_u.resok4.count = written_size;
verf_desc.addr = res_WRITE4->WRITE4res_u.resok4.writeverf;
verf_desc.len = sizeof(verifier4);
op_ctx->fsal_export->exp_ops.get_write_verifier(op_ctx->fsal_export,
&verf_desc);
res_WRITE4->status = NFS4_OK;
done:
if (anonymous_started)
state_share_anonymous_io_done(obj, OPEN4_SHARE_ACCESS_WRITE);
server_stats_io_done(size, written_size,
(res_WRITE4->status == NFS4_OK) ? true : false,
true);
out:
if (owner != NULL)
dec_state_owner_ref(owner);
if (state_found != NULL)
dec_state_t_ref(state_found);
if (state_open != NULL)
dec_state_t_ref(state_open);
return res_WRITE4->status;
} /* nfs4_op_write */
