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linux/fs/afs/fsclient.c
David Howells e49c7b2f6d afs: Build an abstraction around an "operation" concept 
Turn the afs_operation struct into the main way that most fileserver
operations are managed.  Various things are added to the struct, including
the following:

 (1) All the parameters and results of the relevant operations are moved
     into it, removing corresponding fields from the afs_call struct.
     afs_call gets a pointer to the op.

 (2) The target volume is made the main focus of the operation, rather than
     the target vnode(s), and a bunch of op->vnode->volume are made
     op->volume instead.

 (3) Two vnode records are defined (op->file[]) for the vnode(s) involved
     in most operations.  The vnode record (struct afs_vnode_param)
     contains:

	- The vnode pointer.

	- The fid of the vnode to be included in the parameters or that was
          returned in the reply (eg. FS.MakeDir).

	- The status and callback information that may be returned in the
     	  reply about the vnode.

	- Callback break and data version tracking for detecting
          simultaneous third-parth changes.

 (4) Pointers to dentries to be updated with new inodes.

 (5) An operations table pointer.  The table includes pointers to functions
     for issuing AFS and YFS-variant RPCs, handling the success and abort
     of an operation and handling post-I/O-lock local editing of a
     directory.

To make this work, the following function restructuring is made:

 (A) The rotation loop that issues calls to fileservers that can be found
     in each function that wants to issue an RPC (such as afs_mkdir()) is
     extracted out into common code, in a new file called fs_operation.c.

 (B) The rotation loops, such as the one in afs_mkdir(), are replaced with
     a much smaller piece of code that allocates an operation, sets the
     parameters and then calls out to the common code to do the actual
     work.

 (C) The code for handling the success and failure of an operation are
     moved into operation functions (as (5) above) and these are called
     from the core code at appropriate times.

 (D) The pseudo inode getting stuff used by the dynamic root code is moved
     over into dynroot.c.

 (E) struct afs_iget_data is absorbed into the operation struct and
     afs_iget() expects to be given an op pointer and a vnode record.

 (F) Point (E) doesn't work for the root dir of a volume, but we know the
     FID in advance (it's always vnode 1, unique 1), so a separate inode
     getter, afs_root_iget(), is provided to special-case that.

 (G) The inode status init/update functions now also take an op and a vnode
     record.

 (H) The RPC marshalling functions now, for the most part, just take an
     afs_operation struct as their only argument.  All the data they need
     is held there.  The result delivery functions write their answers
     there as well.

 (I) The call is attached to the operation and then the operation core does
     the waiting.

And then the new operation code is, for the moment, made to just initialise
the operation, get the appropriate vnode I/O locks and do the same rotation
loop as before.

This lays the foundation for the following changes in the future:

 (*) Overhauling the rotation (again).

 (*) Support for asynchronous I/O, where the fileserver rotation must be
     done asynchronously also.

Signed-off-by: David Howells <dhowells@redhat.com>
2020-06-04 15:37:17 +01:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/* AFS File Server client stubs
*
* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/circ_buf.h>
#include <linux/iversion.h>
#include "internal.h"
#include "afs_fs.h"
#include "xdr_fs.h"
/*
* decode an AFSFid block
*/
static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
{
const __be32 *bp = *_bp;
fid->vid = ntohl(*bp++);
fid->vnode = ntohl(*bp++);
fid->unique = ntohl(*bp++);
*_bp = bp;
}
/*
* Dump a bad file status record.
*/
static void xdr_dump_bad(const __be32 *bp)
{
__be32 x[4];
int i;
pr_notice("AFS XDR: Bad status record\n");
for (i = 0; i < 5 * 4 * 4; i += 16) {
memcpy(x, bp, 16);
bp += 4;
pr_notice("%03x: %08x %08x %08x %08x\n",
i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
}
memcpy(x, bp, 4);
pr_notice("0x50: %08x\n", ntohl(x[0]));
}
/*
* decode an AFSFetchStatus block
*/
static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
struct afs_call *call,
struct afs_status_cb *scb)
{
const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
struct afs_file_status *status = &scb->status;
bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
u64 data_version, size;
u32 type, abort_code;
abort_code = ntohl(xdr->abort_code);
if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
if (xdr->if_version == htonl(0) &&
abort_code != 0 &&
inline_error) {
/* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
* whereby it doesn't set the interface version in the error
* case.
*/
status->abort_code = abort_code;
scb->have_error = true;
goto advance;
}
pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
goto bad;
}
if (abort_code != 0 && inline_error) {
status->abort_code = abort_code;
scb->have_error = true;
goto advance;
}
type = ntohl(xdr->type);
switch (type) {
case AFS_FTYPE_FILE:
case AFS_FTYPE_DIR:
case AFS_FTYPE_SYMLINK:
status->type = type;
break;
default:
goto bad;
}
status->nlink = ntohl(xdr->nlink);
status->author = ntohl(xdr->author);
status->owner = ntohl(xdr->owner);
status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
status->anon_access = ntohl(xdr->anon_access);
status->mode = ntohl(xdr->mode) & S_IALLUGO;
status->group = ntohl(xdr->group);
status->lock_count = ntohl(xdr->lock_count);
status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
status->mtime_client.tv_nsec = 0;
status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
status->mtime_server.tv_nsec = 0;
size = (u64)ntohl(xdr->size_lo);
size |= (u64)ntohl(xdr->size_hi) << 32;
status->size = size;
data_version = (u64)ntohl(xdr->data_version_lo);
data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
status->data_version = data_version;
scb->have_status = true;
advance:
*_bp = (const void *)*_bp + sizeof(*xdr);
return;
bad:
xdr_dump_bad(*_bp);
afs_protocol_error(call, afs_eproto_bad_status);
goto advance;
}
static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
{
return ktime_divns(call->reply_time, NSEC_PER_SEC) + expiry;
}
static void xdr_decode_AFSCallBack(const __be32 **_bp,
struct afs_call *call,
struct afs_status_cb *scb)
{
struct afs_callback *cb = &scb->callback;
const __be32 *bp = *_bp;
bp++; /* version */
cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
bp++; /* type */
scb->have_cb = true;
*_bp = bp;
}
/*
* decode an AFSVolSync block
*/
static void xdr_decode_AFSVolSync(const __be32 **_bp,
struct afs_volsync *volsync)
{
const __be32 *bp = *_bp;
u32 creation;
creation = ntohl(*bp++);
bp++; /* spare2 */
bp++; /* spare3 */
bp++; /* spare4 */
bp++; /* spare5 */
bp++; /* spare6 */
*_bp = bp;
if (volsync)
volsync->creation = creation;
}
/*
* encode the requested attributes into an AFSStoreStatus block
*/
static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
{
__be32 *bp = *_bp;
u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
mask = 0;
if (attr->ia_valid & ATTR_MTIME) {
mask |= AFS_SET_MTIME;
mtime = attr->ia_mtime.tv_sec;
}
if (attr->ia_valid & ATTR_UID) {
mask |= AFS_SET_OWNER;
owner = from_kuid(&init_user_ns, attr->ia_uid);
}
if (attr->ia_valid & ATTR_GID) {
mask |= AFS_SET_GROUP;
group = from_kgid(&init_user_ns, attr->ia_gid);
}
if (attr->ia_valid & ATTR_MODE) {
mask |= AFS_SET_MODE;
mode = attr->ia_mode & S_IALLUGO;
}
*bp++ = htonl(mask);
*bp++ = htonl(mtime);
*bp++ = htonl(owner);
*bp++ = htonl(group);
*bp++ = htonl(mode);
*bp++ = 0; /* segment size */
*_bp = bp;
}
/*
* decode an AFSFetchVolumeStatus block
*/
static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
struct afs_volume_status *vs)
{
const __be32 *bp = *_bp;
vs->vid = ntohl(*bp++);
vs->parent_id = ntohl(*bp++);
vs->online = ntohl(*bp++);
vs->in_service = ntohl(*bp++);
vs->blessed = ntohl(*bp++);
vs->needs_salvage = ntohl(*bp++);
vs->type = ntohl(*bp++);
vs->min_quota = ntohl(*bp++);
vs->max_quota = ntohl(*bp++);
vs->blocks_in_use = ntohl(*bp++);
vs->part_blocks_avail = ntohl(*bp++);
vs->part_max_blocks = ntohl(*bp++);
vs->vol_copy_date = 0;
vs->vol_backup_date = 0;
*_bp = bp;
}
/*
* deliver reply data to an FS.FetchStatus
*/
static int afs_deliver_fs_fetch_status(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSCallBack(&bp, call, &vp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.FetchStatus operation type
*/
static const struct afs_call_type afs_RXFSFetchStatus = {
.name = "FS.FetchStatus",
.op = afs_FS_FetchStatus,
.deliver = afs_deliver_fs_fetch_status,
.destructor = afs_flat_call_destructor,
};
/*
* fetch the status information for a file
*/
void afs_fs_fetch_status(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &afs_RXFSFetchStatus,
16, (21 + 3 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHSTATUS);
bp[1] = htonl(vp->fid.vid);
bp[2] = htonl(vp->fid.vnode);
bp[3] = htonl(vp->fid.unique);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.FetchData
*/
static int afs_deliver_fs_fetch_data(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[0];
struct afs_read *req = op->fetch.req;
const __be32 *bp;
unsigned int size;
int ret;
_enter("{%u,%zu/%llu}",
call->unmarshall, iov_iter_count(call->iter), req->actual_len);
switch (call->unmarshall) {
case 0:
req->actual_len = 0;
req->index = 0;
req->offset = req->pos & (PAGE_SIZE - 1);
call->unmarshall++;
if (call->operation_ID == FSFETCHDATA64) {
afs_extract_to_tmp64(call);
} else {
call->tmp_u = htonl(0);
afs_extract_to_tmp(call);
}
/* Fall through */
/* extract the returned data length */
case 1:
_debug("extract data length");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
req->actual_len = be64_to_cpu(call->tmp64);
_debug("DATA length: %llu", req->actual_len);
req->remain = min(req->len, req->actual_len);
if (req->remain == 0)
goto no_more_data;
call->unmarshall++;
begin_page:
ASSERTCMP(req->index, <, req->nr_pages);
if (req->remain > PAGE_SIZE - req->offset)
size = PAGE_SIZE - req->offset;
else
size = req->remain;
call->bvec[0].bv_len = size;
call->bvec[0].bv_offset = req->offset;
call->bvec[0].bv_page = req->pages[req->index];
iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size);
ASSERTCMP(size, <=, PAGE_SIZE);
/* Fall through */
/* extract the returned data */
case 2:
_debug("extract data %zu/%llu",
iov_iter_count(call->iter), req->remain);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
req->remain -= call->bvec[0].bv_len;
req->offset += call->bvec[0].bv_len;
ASSERTCMP(req->offset, <=, PAGE_SIZE);
if (req->offset == PAGE_SIZE) {
req->offset = 0;
req->index++;
if (req->remain > 0)
goto begin_page;
}
ASSERTCMP(req->remain, ==, 0);
if (req->actual_len <= req->len)
goto no_more_data;
/* Discard any excess data the server gave us */
afs_extract_discard(call, req->actual_len - req->len);
call->unmarshall = 3;
/* Fall through */
case 3:
_debug("extract discard %zu/%llu",
iov_iter_count(call->iter), req->actual_len - req->len);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
no_more_data:
call->unmarshall = 4;
afs_extract_to_buf(call, (21 + 3 + 6) * 4);
/* Fall through */
/* extract the metadata */
case 4:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSCallBack(&bp, call, &vp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
req->data_version = vp->scb.status.data_version;
req->file_size = vp->scb.status.size;
call->unmarshall++;
case 5:
break;
}
for (; req->index < req->nr_pages; req->index++) {
if (req->offset < PAGE_SIZE)
zero_user_segment(req->pages[req->index],
req->offset, PAGE_SIZE);
req->offset = 0;
}
if (req->page_done)
for (req->index = 0; req->index < req->nr_pages; req->index++)
req->page_done(req);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.FetchData operation type
*/
static const struct afs_call_type afs_RXFSFetchData = {
.name = "FS.FetchData",
.op = afs_FS_FetchData,
.deliver = afs_deliver_fs_fetch_data,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSFetchData64 = {
.name = "FS.FetchData64",
.op = afs_FS_FetchData64,
.deliver = afs_deliver_fs_fetch_data,
.destructor = afs_flat_call_destructor,
};
/*
* fetch data from a very large file
*/
static void afs_fs_fetch_data64(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_read *req = op->fetch.req;
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHDATA64);
bp[1] = htonl(vp->fid.vid);
bp[2] = htonl(vp->fid.vnode);
bp[3] = htonl(vp->fid.unique);
bp[4] = htonl(upper_32_bits(req->pos));
bp[5] = htonl(lower_32_bits(req->pos));
bp[6] = 0;
bp[7] = htonl(lower_32_bits(req->len));
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* fetch data from a file
*/
void afs_fs_fetch_data(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct afs_read *req = op->fetch.req;
__be32 *bp;
if (upper_32_bits(req->pos) ||
upper_32_bits(req->len) ||
upper_32_bits(req->pos + req->len))
return afs_fs_fetch_data64(op);
_enter("");
call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHDATA);
bp[1] = htonl(vp->fid.vid);
bp[2] = htonl(vp->fid.vnode);
bp[3] = htonl(vp->fid.unique);
bp[4] = htonl(lower_32_bits(req->pos));
bp[5] = htonl(lower_32_bits(req->len));
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.CreateFile or an FS.MakeDir
*/
static int afs_deliver_fs_create_vnode(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFid(&bp, &op->file[1].fid);
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_AFSCallBack(&bp, call, &vp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.CreateFile and FS.MakeDir operation type
*/
static const struct afs_call_type afs_RXFSCreateFile = {
.name = "FS.CreateFile",
.op = afs_FS_CreateFile,
.deliver = afs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* Create a file.
*/
void afs_fs_create_file(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t namesz, reqsz, padsz;
__be32 *bp;
_enter("");
namesz = name->len;
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz + (6 * 4);
call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile,
reqsz, (3 + 21 + 21 + 3 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSCREATEFILE);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name->name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
*bp++ = htonl(op->mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
*bp++ = 0; /* segment size */
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
static const struct afs_call_type afs_RXFSMakeDir = {
.name = "FS.MakeDir",
.op = afs_FS_MakeDir,
.deliver = afs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* Create a new directory
*/
void afs_fs_make_dir(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t namesz, reqsz, padsz;
__be32 *bp;
_enter("");
namesz = name->len;
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz + (6 * 4);
call = afs_alloc_flat_call(op->net, &afs_RXFSMakeDir,
reqsz, (3 + 21 + 21 + 3 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSMAKEDIR);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name->name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
*bp++ = htonl(op->mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
*bp++ = 0; /* segment size */
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to any operation that returns status and volume sync.
*/
static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[0];
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.RemoveFile operation type
*/
static const struct afs_call_type afs_RXFSRemoveFile = {
.name = "FS.RemoveFile",
.op = afs_FS_RemoveFile,
.deliver = afs_deliver_fs_file_status_and_vol,
.destructor = afs_flat_call_destructor,
};
/*
* Remove a file.
*/
void afs_fs_remove_file(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t namesz, reqsz, padsz;
__be32 *bp;
_enter("");
namesz = name->len;
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz;
call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveFile,
reqsz, (21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSREMOVEFILE);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name->name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
static const struct afs_call_type afs_RXFSRemoveDir = {
.name = "FS.RemoveDir",
.op = afs_FS_RemoveDir,
.deliver = afs_deliver_fs_file_status_and_vol,
.destructor = afs_flat_call_destructor,
};
/*
* Remove a directory.
*/
void afs_fs_remove_dir(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t namesz, reqsz, padsz;
__be32 *bp;
_enter("");
namesz = name->len;
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz;
call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveDir,
reqsz, (21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSREMOVEDIR);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name->name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.Link
*/
static int afs_deliver_fs_link(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.Link operation type
*/
static const struct afs_call_type afs_RXFSLink = {
.name = "FS.Link",
.op = afs_FS_Link,
.deliver = afs_deliver_fs_link,
.destructor = afs_flat_call_destructor,
};
/*
* make a hard link
*/
void afs_fs_link(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
struct afs_call *call;
size_t namesz, reqsz, padsz;
__be32 *bp;
_enter("");
namesz = name->len;
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz + (3 * 4);
call = afs_alloc_flat_call(op->net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSLINK);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name->name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
trace_afs_make_fs_call1(call, &vp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.Symlink
*/
static int afs_deliver_fs_symlink(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFid(&bp, &vp->fid);
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.Symlink operation type
*/
static const struct afs_call_type afs_RXFSSymlink = {
.name = "FS.Symlink",
.op = afs_FS_Symlink,
.deliver = afs_deliver_fs_symlink,
.destructor = afs_flat_call_destructor,
};
/*
* create a symbolic link
*/
void afs_fs_symlink(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t namesz, reqsz, padsz, c_namesz, c_padsz;
__be32 *bp;
_enter("");
namesz = name->len;
padsz = (4 - (namesz & 3)) & 3;
c_namesz = strlen(op->create.symlink);
c_padsz = (4 - (c_namesz & 3)) & 3;
reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
call = afs_alloc_flat_call(op->net, &afs_RXFSSymlink, reqsz,
(3 + 21 + 21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSYMLINK);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name->name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(c_namesz);
memcpy(bp, op->create.symlink, c_namesz);
bp = (void *) bp + c_namesz;
if (c_padsz > 0) {
memset(bp, 0, c_padsz);
bp = (void *) bp + c_padsz;
}
*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
*bp++ = htonl(op->mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = htonl(S_IRWXUGO); /* unix mode */
*bp++ = 0; /* segment size */
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.Rename
*/
static int afs_deliver_fs_rename(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *orig_dvp = &op->file[0];
struct afs_vnode_param *new_dvp = &op->file[1];
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
/* If the two dirs are the same, we have two copies of the same status
* report, so we just decode it twice.
*/
xdr_decode_AFSFetchStatus(&bp, call, &orig_dvp->scb);
xdr_decode_AFSFetchStatus(&bp, call, &new_dvp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.Rename operation type
*/
static const struct afs_call_type afs_RXFSRename = {
.name = "FS.Rename",
.op = afs_FS_Rename,
.deliver = afs_deliver_fs_rename,
.destructor = afs_flat_call_destructor,
};
/*
* Rename/move a file or directory.
*/
void afs_fs_rename(struct afs_operation *op)
{
struct afs_vnode_param *orig_dvp = &op->file[0];
struct afs_vnode_param *new_dvp = &op->file[1];
const struct qstr *orig_name = &op->dentry->d_name;
const struct qstr *new_name = &op->dentry_2->d_name;
struct afs_call *call;
size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
__be32 *bp;
_enter("");
o_namesz = orig_name->len;
o_padsz = (4 - (o_namesz & 3)) & 3;
n_namesz = new_name->len;
n_padsz = (4 - (n_namesz & 3)) & 3;
reqsz = (4 * 4) +
4 + o_namesz + o_padsz +
(3 * 4) +
4 + n_namesz + n_padsz;
call = afs_alloc_flat_call(op->net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSRENAME);
*bp++ = htonl(orig_dvp->fid.vid);
*bp++ = htonl(orig_dvp->fid.vnode);
*bp++ = htonl(orig_dvp->fid.unique);
*bp++ = htonl(o_namesz);
memcpy(bp, orig_name->name, o_namesz);
bp = (void *) bp + o_namesz;
if (o_padsz > 0) {
memset(bp, 0, o_padsz);
bp = (void *) bp + o_padsz;
}
*bp++ = htonl(new_dvp->fid.vid);
*bp++ = htonl(new_dvp->fid.vnode);
*bp++ = htonl(new_dvp->fid.unique);
*bp++ = htonl(n_namesz);
memcpy(bp, new_name->name, n_namesz);
bp = (void *) bp + n_namesz;
if (n_padsz > 0) {
memset(bp, 0, n_padsz);
bp = (void *) bp + n_padsz;
}
trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to FS.StoreData or FS.StoreStatus
*/
static int afs_deliver_fs_store_data(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[0];
const __be32 *bp;
int ret;
_enter("");
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.StoreData operation type
*/
static const struct afs_call_type afs_RXFSStoreData = {
.name = "FS.StoreData",
.op = afs_FS_StoreData,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSStoreData64 = {
.name = "FS.StoreData64",
.op = afs_FS_StoreData64,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
/*
* store a set of pages to a very large file
*/
static void afs_fs_store_data64(struct afs_operation *op,
loff_t pos, loff_t size, loff_t i_size)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64,
(4 + 6 + 3 * 2) * 4,
(21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
call->send_pages = true;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA64);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
*bp++ = htonl(AFS_SET_MTIME); /* mask */
*bp++ = htonl(op->mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = 0; /* unix mode */
*bp++ = 0; /* segment size */
*bp++ = htonl(upper_32_bits(pos));
*bp++ = htonl(lower_32_bits(pos));
*bp++ = htonl(upper_32_bits(size));
*bp++ = htonl(lower_32_bits(size));
*bp++ = htonl(upper_32_bits(i_size));
*bp++ = htonl(lower_32_bits(i_size));
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* store a set of pages
*/
void afs_fs_store_data(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
loff_t size, pos, i_size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
size = (loff_t)op->store.last_to - (loff_t)op->store.first_offset;
if (op->store.first != op->store.last)
size += (loff_t)(op->store.last - op->store.first) << PAGE_SHIFT;
pos = (loff_t)op->store.first << PAGE_SHIFT;
pos += op->store.first_offset;
i_size = i_size_read(&vp->vnode->vfs_inode);
if (pos + size > i_size)
i_size = size + pos;
_debug("size %llx, at %llx, i_size %llx",
(unsigned long long) size, (unsigned long long) pos,
(unsigned long long) i_size);
if (upper_32_bits(pos) || upper_32_bits(i_size) || upper_32_bits(size) ||
upper_32_bits(pos + size))
return afs_fs_store_data64(op, pos, size, i_size);
call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData,
(4 + 6 + 3) * 4,
(21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
call->send_pages = true;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
*bp++ = htonl(AFS_SET_MTIME); /* mask */
*bp++ = htonl(op->mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = 0; /* unix mode */
*bp++ = 0; /* segment size */
*bp++ = htonl(lower_32_bits(pos));
*bp++ = htonl(lower_32_bits(size));
*bp++ = htonl(lower_32_bits(i_size));
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* FS.StoreStatus operation type
*/
static const struct afs_call_type afs_RXFSStoreStatus = {
.name = "FS.StoreStatus",
.op = afs_FS_StoreStatus,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSStoreData_as_Status = {
.name = "FS.StoreData",
.op = afs_FS_StoreData,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
.name = "FS.StoreData64",
.op = afs_FS_StoreData64,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
/*
* set the attributes on a very large file, using FS.StoreData rather than
* FS.StoreStatus so as to alter the file size also
*/
static void afs_fs_setattr_size64(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct iattr *attr = op->setattr.attr;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
ASSERT(attr->ia_valid & ATTR_SIZE);
call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64_as_Status,
(4 + 6 + 3 * 2) * 4,
(21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA64);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
xdr_encode_AFS_StoreStatus(&bp, attr);
*bp++ = htonl(upper_32_bits(attr->ia_size)); /* position of start of write */
*bp++ = htonl(lower_32_bits(attr->ia_size));
*bp++ = 0; /* size of write */
*bp++ = 0;
*bp++ = htonl(upper_32_bits(attr->ia_size)); /* new file length */
*bp++ = htonl(lower_32_bits(attr->ia_size));
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
* so as to alter the file size also
*/
static void afs_fs_setattr_size(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct iattr *attr = op->setattr.attr;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
ASSERT(attr->ia_valid & ATTR_SIZE);
if (upper_32_bits(attr->ia_size))
return afs_fs_setattr_size64(op);
call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData_as_Status,
(4 + 6 + 3) * 4,
(21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
xdr_encode_AFS_StoreStatus(&bp, attr);
*bp++ = htonl(attr->ia_size); /* position of start of write */
*bp++ = 0; /* size of write */
*bp++ = htonl(attr->ia_size); /* new file length */
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* set the attributes on a file, using FS.StoreData if there's a change in file
* size, and FS.StoreStatus otherwise
*/
void afs_fs_setattr(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct iattr *attr = op->setattr.attr;
__be32 *bp;
if (attr->ia_valid & ATTR_SIZE)
return afs_fs_setattr_size(op);
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &afs_RXFSStoreStatus,
(4 + 6) * 4,
(21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTORESTATUS);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
xdr_encode_AFS_StoreStatus(&bp, op->setattr.attr);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.GetVolumeStatus
*/
static int afs_deliver_fs_get_volume_status(struct afs_call *call)
{
struct afs_operation *op = call->op;
const __be32 *bp;
char *p;
u32 size;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
call->unmarshall++;
afs_extract_to_buf(call, 12 * 4);
/* Fall through */
/* extract the returned status record */
case 1:
_debug("extract status");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs);
call->unmarshall++;
afs_extract_to_tmp(call);
/* Fall through */
/* extract the volume name length */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
call->count = ntohl(call->tmp);
_debug("volname length: %u", call->count);
if (call->count >= AFSNAMEMAX)
return afs_protocol_error(call, afs_eproto_volname_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_to_buf(call, size);
call->unmarshall++;
/* Fall through */
/* extract the volume name */
case 3:
_debug("extract volname");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
p = call->buffer;
p[call->count] = 0;
_debug("volname '%s'", p);
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* extract the offline message length */
case 4:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
call->count = ntohl(call->tmp);
_debug("offline msg length: %u", call->count);
if (call->count >= AFSNAMEMAX)
return afs_protocol_error(call, afs_eproto_offline_msg_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_to_buf(call, size);
call->unmarshall++;
/* Fall through */
/* extract the offline message */
case 5:
_debug("extract offline");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
p = call->buffer;
p[call->count] = 0;
_debug("offline '%s'", p);
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* extract the message of the day length */
case 6:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
call->count = ntohl(call->tmp);
_debug("motd length: %u", call->count);
if (call->count >= AFSNAMEMAX)
return afs_protocol_error(call, afs_eproto_motd_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_to_buf(call, size);
call->unmarshall++;
/* Fall through */
/* extract the message of the day */
case 7:
_debug("extract motd");
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
p = call->buffer;
p[call->count] = 0;
_debug("motd '%s'", p);
call->unmarshall++;
case 8:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* FS.GetVolumeStatus operation type
*/
static const struct afs_call_type afs_RXFSGetVolumeStatus = {
.name = "FS.GetVolumeStatus",
.op = afs_FS_GetVolumeStatus,
.deliver = afs_deliver_fs_get_volume_status,
.destructor = afs_flat_call_destructor,
};
/*
* fetch the status of a volume
*/
void afs_fs_get_volume_status(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &afs_RXFSGetVolumeStatus, 2 * 4,
max(12 * 4, AFSOPAQUEMAX + 1));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSGETVOLUMESTATUS);
bp[1] = htonl(vp->fid.vid);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
*/
static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
{
struct afs_operation *op = call->op;
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.SetLock operation type
*/
static const struct afs_call_type afs_RXFSSetLock = {
.name = "FS.SetLock",
.op = afs_FS_SetLock,
.deliver = afs_deliver_fs_xxxx_lock,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
/*
* FS.ExtendLock operation type
*/
static const struct afs_call_type afs_RXFSExtendLock = {
.name = "FS.ExtendLock",
.op = afs_FS_ExtendLock,
.deliver = afs_deliver_fs_xxxx_lock,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
/*
* FS.ReleaseLock operation type
*/
static const struct afs_call_type afs_RXFSReleaseLock = {
.name = "FS.ReleaseLock",
.op = afs_FS_ReleaseLock,
.deliver = afs_deliver_fs_xxxx_lock,
.destructor = afs_flat_call_destructor,
};
/*
* Set a lock on a file
*/
void afs_fs_set_lock(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSETLOCK);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
*bp++ = htonl(op->lock.type);
trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* extend a lock on a file
*/
void afs_fs_extend_lock(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSEXTENDLOCK);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* release a lock on a file
*/
void afs_fs_release_lock(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSRELEASELOCK);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to an FS.GiveUpAllCallBacks operation.
*/
static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
{
return afs_transfer_reply(call);
}
/*
* FS.GiveUpAllCallBacks operation type
*/
static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
.name = "FS.GiveUpAllCallBacks",
.op = afs_FS_GiveUpAllCallBacks,
.deliver = afs_deliver_fs_give_up_all_callbacks,
.destructor = afs_flat_call_destructor,
};
/*
* Flush all the callbacks we have on a server.
*/
int afs_fs_give_up_all_callbacks(struct afs_net *net,
struct afs_server *server,
struct afs_addr_cursor *ac,
struct key *key)
{
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
if (!call)
return -ENOMEM;
call->key = key;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSGIVEUPALLCALLBACKS);
call->server = afs_use_server(server, afs_server_trace_give_up_cb);
afs_make_call(ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, ac);
}
/*
* Deliver reply data to an FS.GetCapabilities operation.
*/
static int afs_deliver_fs_get_capabilities(struct afs_call *call)
{
u32 count;
int ret;
_enter("{%u,%zu}", call->unmarshall, iov_iter_count(call->iter));
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* Extract the capabilities word count */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
count = ntohl(call->tmp);
call->count = count;
call->count2 = count;
afs_extract_discard(call, count * sizeof(__be32));
call->unmarshall++;
/* Fall through */
/* Extract capabilities words */
case 2:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
/* TODO: Examine capabilities */
call->unmarshall++;
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* FS.GetCapabilities operation type
*/
static const struct afs_call_type afs_RXFSGetCapabilities = {
.name = "FS.GetCapabilities",
.op = afs_FS_GetCapabilities,
.deliver = afs_deliver_fs_get_capabilities,
.done = afs_fileserver_probe_result,
.destructor = afs_flat_call_destructor,
};
/*
* Probe a fileserver for the capabilities that it supports. This RPC can
* reply with up to 196 words. The operation is asynchronous and if we managed
* to allocate a call, true is returned the result is delivered through the
* ->done() - otherwise we return false to indicate we didn't even try.
*/
bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server,
struct afs_addr_cursor *ac, struct key *key)
{
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
if (!call)
return false;
call->key = key;
call->server = afs_use_server(server, afs_server_trace_get_caps);
call->upgrade = true;
call->async = true;
call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSGETCAPABILITIES);
trace_afs_make_fs_call(call, NULL);
afs_make_call(ac, call, GFP_NOFS);
afs_put_call(call);
return true;
}
/*
* Deliver reply data to an FS.InlineBulkStatus call
*/
static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_status_cb *scb;
const __be32 *bp;
u32 tmp;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* Extract the file status count and array in two steps */
case 1:
_debug("extract status count");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
tmp = ntohl(call->tmp);
_debug("status count: %u/%u", tmp, op->nr_files);
if (tmp != op->nr_files)
return afs_protocol_error(call, afs_eproto_ibulkst_count);
call->count = 0;
call->unmarshall++;
more_counts:
afs_extract_to_buf(call, 21 * sizeof(__be32));
/* Fall through */
case 2:
_debug("extract status array %u", call->count);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
switch (call->count) {
case 0:
scb = &op->file[0].scb;
break;
case 1:
scb = &op->file[1].scb;
break;
default:
scb = &op->more_files[call->count - 2].scb;
break;
}
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, scb);
call->count++;
if (call->count < op->nr_files)
goto more_counts;
call->count = 0;
call->unmarshall++;
afs_extract_to_tmp(call);
/* Fall through */
/* Extract the callback count and array in two steps */
case 3:
_debug("extract CB count");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
tmp = ntohl(call->tmp);
_debug("CB count: %u", tmp);
if (tmp != op->nr_files)
return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
call->count = 0;
call->unmarshall++;
more_cbs:
afs_extract_to_buf(call, 3 * sizeof(__be32));
/* Fall through */
case 4:
_debug("extract CB array");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
_debug("unmarshall CB array");
switch (call->count) {
case 0:
scb = &op->file[0].scb;
break;
case 1:
scb = &op->file[1].scb;
break;
default:
scb = &op->more_files[call->count - 2].scb;
break;
}
bp = call->buffer;
xdr_decode_AFSCallBack(&bp, call, scb);
call->count++;
if (call->count < op->nr_files)
goto more_cbs;
afs_extract_to_buf(call, 6 * sizeof(__be32));
call->unmarshall++;
/* Fall through */
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSVolSync(&bp, &op->volsync);
call->unmarshall++;
case 6:
break;
}
_leave(" = 0 [done]");
return 0;
}
static void afs_done_fs_inline_bulk_status(struct afs_call *call)
{
if (call->error == -ECONNABORTED &&
call->abort_code == RX_INVALID_OPERATION)
set_bit(AFS_SERVER_FL_NO_IBULK, &call->server->flags);
}
/*
* FS.InlineBulkStatus operation type
*/
static const struct afs_call_type afs_RXFSInlineBulkStatus = {
.name = "FS.InlineBulkStatus",
.op = afs_FS_InlineBulkStatus,
.deliver = afs_deliver_fs_inline_bulk_status,
.done = afs_done_fs_inline_bulk_status,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for up to 50 files
*/
void afs_fs_inline_bulk_status(struct afs_operation *op)
{
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
struct afs_call *call;
__be32 *bp;
int i;
if (test_bit(AFS_SERVER_FL_NO_IBULK, &op->cbi->server->flags)) {
op->error = -ENOTSUPP;
return;
}
_enter(",%x,{%llx:%llu},%u",
key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
call = afs_alloc_flat_call(op->net, &afs_RXFSInlineBulkStatus,
(2 + op->nr_files * 3) * 4,
21 * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSINLINEBULKSTATUS);
*bp++ = htonl(op->nr_files);
*bp++ = htonl(dvp->fid.vid);
*bp++ = htonl(dvp->fid.vnode);
*bp++ = htonl(dvp->fid.unique);
*bp++ = htonl(vp->fid.vid);
*bp++ = htonl(vp->fid.vnode);
*bp++ = htonl(vp->fid.unique);
for (i = 0; i < op->nr_files - 2; i++) {
*bp++ = htonl(op->more_files[i].fid.vid);
*bp++ = htonl(op->more_files[i].fid.vnode);
*bp++ = htonl(op->more_files[i].fid.unique);
}
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* deliver reply data to an FS.FetchACL
*/
static int afs_deliver_fs_fetch_acl(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[0];
struct afs_acl *acl;
const __be32 *bp;
unsigned int size;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* extract the returned data length */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
size = call->count2 = ntohl(call->tmp);
size = round_up(size, 4);
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
op->acl = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
call->unmarshall++;
/* Fall through */
/* extract the returned data */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_buf(call, (21 + 6) * 4);
call->unmarshall++;
/* Fall through */
/* extract the metadata */
case 3:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_AFSVolSync(&bp, &op->volsync);
call->unmarshall++;
case 4:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* FS.FetchACL operation type
*/
static const struct afs_call_type afs_RXFSFetchACL = {
.name = "FS.FetchACL",
.op = afs_FS_FetchACL,
.deliver = afs_deliver_fs_fetch_acl,
};
/*
* Fetch the ACL for a file.
*/
void afs_fs_fetch_acl(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHACL);
bp[1] = htonl(vp->fid.vid);
bp[2] = htonl(vp->fid.vnode);
bp[3] = htonl(vp->fid.unique);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_KERNEL);
}
/*
* FS.StoreACL operation type
*/
static const struct afs_call_type afs_RXFSStoreACL = {
.name = "FS.StoreACL",
.op = afs_FS_StoreACL,
.deliver = afs_deliver_fs_file_status_and_vol,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the ACL for a file.
*/
void afs_fs_store_acl(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
const struct afs_acl *acl = op->acl;
size_t size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
size = round_up(acl->size, 4);
call = afs_alloc_flat_call(op->net, &afs_RXFSStoreACL,
5 * 4 + size, (21 + 6) * 4);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSSTOREACL);
bp[1] = htonl(vp->fid.vid);
bp[2] = htonl(vp->fid.vnode);
bp[3] = htonl(vp->fid.unique);
bp[4] = htonl(acl->size);
memcpy(&bp[5], acl->data, acl->size);
if (acl->size != size)
memset((void *)&bp[5] + acl->size, 0, size - acl->size);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_KERNEL);
}
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