forked from luck/tmp_suning_uos_patched
416351f28d
Make some miscellaneous changes to the AFS filesystem: (1) Assert RCU barriers on module exit to make sure RCU has finished with callbacks in this module. (2) Correctly handle the AFS server returning a zero-length read. (3) Split out data zapping calls into one function (afs_zap_data). (4) Rename some afs_file_*() functions to afs_*() where they apply to non-regular files too. (5) Be consistent about the presentation of volume ID:vnode ID in debugging output. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
942 lines
22 KiB
C
942 lines
22 KiB
C
/* AFS File Server client stubs
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*
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* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/circ_buf.h>
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#include "internal.h"
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#include "afs_fs.h"
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/*
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* decode an AFSFid block
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*/
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static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
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{
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const __be32 *bp = *_bp;
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fid->vid = ntohl(*bp++);
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fid->vnode = ntohl(*bp++);
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fid->unique = ntohl(*bp++);
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*_bp = bp;
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}
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/*
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* decode an AFSFetchStatus block
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*/
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static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
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struct afs_file_status *status,
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struct afs_vnode *vnode)
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{
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const __be32 *bp = *_bp;
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umode_t mode;
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u64 data_version, size;
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u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
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#define EXTRACT(DST) \
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do { \
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u32 x = ntohl(*bp++); \
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changed |= DST - x; \
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DST = x; \
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} while (0)
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status->if_version = ntohl(*bp++);
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EXTRACT(status->type);
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EXTRACT(status->nlink);
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size = ntohl(*bp++);
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data_version = ntohl(*bp++);
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EXTRACT(status->author);
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EXTRACT(status->owner);
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EXTRACT(status->caller_access); /* call ticket dependent */
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EXTRACT(status->anon_access);
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EXTRACT(status->mode);
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EXTRACT(status->parent.vnode);
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EXTRACT(status->parent.unique);
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bp++; /* seg size */
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status->mtime_client = ntohl(*bp++);
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status->mtime_server = ntohl(*bp++);
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EXTRACT(status->group);
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bp++; /* sync counter */
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data_version |= (u64) ntohl(*bp++) << 32;
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bp++; /* lock count */
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size |= (u64) ntohl(*bp++) << 32;
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bp++; /* spare 4 */
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*_bp = bp;
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if (size != status->size) {
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status->size = size;
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changed |= true;
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}
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status->mode &= S_IALLUGO;
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_debug("vnode time %lx, %lx",
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status->mtime_client, status->mtime_server);
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if (vnode) {
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status->parent.vid = vnode->fid.vid;
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if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
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_debug("vnode changed");
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i_size_write(&vnode->vfs_inode, size);
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vnode->vfs_inode.i_uid = status->owner;
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vnode->vfs_inode.i_gid = status->group;
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vnode->vfs_inode.i_version = vnode->fid.unique;
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vnode->vfs_inode.i_nlink = status->nlink;
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mode = vnode->vfs_inode.i_mode;
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mode &= ~S_IALLUGO;
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mode |= status->mode;
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barrier();
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vnode->vfs_inode.i_mode = mode;
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}
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vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
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vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
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vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
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}
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if (status->data_version != data_version) {
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status->data_version = data_version;
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if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
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_debug("vnode modified %llx on {%x:%u}",
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(unsigned long long) data_version,
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vnode->fid.vid, vnode->fid.vnode);
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set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
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set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
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}
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}
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}
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/*
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* decode an AFSCallBack block
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*/
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static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
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{
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const __be32 *bp = *_bp;
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vnode->cb_version = ntohl(*bp++);
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vnode->cb_expiry = ntohl(*bp++);
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vnode->cb_type = ntohl(*bp++);
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vnode->cb_expires = vnode->cb_expiry + get_seconds();
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*_bp = bp;
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}
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static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
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struct afs_callback *cb)
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{
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const __be32 *bp = *_bp;
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cb->version = ntohl(*bp++);
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cb->expiry = ntohl(*bp++);
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cb->type = ntohl(*bp++);
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*_bp = bp;
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}
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/*
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* decode an AFSVolSync block
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*/
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static void xdr_decode_AFSVolSync(const __be32 **_bp,
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struct afs_volsync *volsync)
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{
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const __be32 *bp = *_bp;
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volsync->creation = ntohl(*bp++);
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bp++; /* spare2 */
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bp++; /* spare3 */
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bp++; /* spare4 */
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bp++; /* spare5 */
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bp++; /* spare6 */
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*_bp = bp;
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}
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/*
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* deliver reply data to an FS.FetchStatus
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*/
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static int afs_deliver_fs_fetch_status(struct afs_call *call,
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struct sk_buff *skb, bool last)
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{
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struct afs_vnode *vnode = call->reply;
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const __be32 *bp;
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_enter(",,%u", last);
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afs_transfer_reply(call, skb);
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if (!last)
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return 0;
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if (call->reply_size != call->reply_max)
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return -EBADMSG;
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/* unmarshall the reply once we've received all of it */
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bp = call->buffer;
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xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
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xdr_decode_AFSCallBack(&bp, vnode);
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if (call->reply2)
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xdr_decode_AFSVolSync(&bp, call->reply2);
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_leave(" = 0 [done]");
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return 0;
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}
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/*
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* FS.FetchStatus operation type
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*/
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static const struct afs_call_type afs_RXFSFetchStatus = {
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.name = "FS.FetchStatus",
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.deliver = afs_deliver_fs_fetch_status,
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.abort_to_error = afs_abort_to_error,
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.destructor = afs_flat_call_destructor,
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};
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/*
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* fetch the status information for a file
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*/
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int afs_fs_fetch_file_status(struct afs_server *server,
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struct key *key,
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struct afs_vnode *vnode,
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struct afs_volsync *volsync,
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const struct afs_wait_mode *wait_mode)
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{
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struct afs_call *call;
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__be32 *bp;
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_enter(",%x,{%x:%u},,",
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key_serial(key), vnode->fid.vid, vnode->fid.vnode);
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call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
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if (!call)
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return -ENOMEM;
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call->key = key;
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call->reply = vnode;
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call->reply2 = volsync;
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call->service_id = FS_SERVICE;
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call->port = htons(AFS_FS_PORT);
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/* marshall the parameters */
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bp = call->request;
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bp[0] = htonl(FSFETCHSTATUS);
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bp[1] = htonl(vnode->fid.vid);
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bp[2] = htonl(vnode->fid.vnode);
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bp[3] = htonl(vnode->fid.unique);
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return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
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}
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/*
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* deliver reply data to an FS.FetchData
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*/
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static int afs_deliver_fs_fetch_data(struct afs_call *call,
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struct sk_buff *skb, bool last)
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{
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struct afs_vnode *vnode = call->reply;
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const __be32 *bp;
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struct page *page;
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void *buffer;
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int ret;
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_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
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switch (call->unmarshall) {
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case 0:
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call->offset = 0;
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call->unmarshall++;
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/* extract the returned data length */
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case 1:
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_debug("extract data length");
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ret = afs_extract_data(call, skb, last, &call->tmp, 4);
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switch (ret) {
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case 0: break;
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case -EAGAIN: return 0;
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default: return ret;
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}
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call->count = ntohl(call->tmp);
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_debug("DATA length: %u", call->count);
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if (call->count > PAGE_SIZE)
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return -EBADMSG;
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call->offset = 0;
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call->unmarshall++;
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/* extract the returned data */
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case 2:
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_debug("extract data");
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if (call->count > 0) {
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page = call->reply3;
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buffer = kmap_atomic(page, KM_USER0);
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ret = afs_extract_data(call, skb, last, buffer,
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call->count);
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kunmap_atomic(buffer, KM_USER0);
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switch (ret) {
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case 0: break;
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case -EAGAIN: return 0;
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default: return ret;
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}
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}
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call->offset = 0;
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call->unmarshall++;
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/* extract the metadata */
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case 3:
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ret = afs_extract_data(call, skb, last, call->buffer,
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(21 + 3 + 6) * 4);
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switch (ret) {
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case 0: break;
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case -EAGAIN: return 0;
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default: return ret;
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}
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bp = call->buffer;
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xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
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xdr_decode_AFSCallBack(&bp, vnode);
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if (call->reply2)
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xdr_decode_AFSVolSync(&bp, call->reply2);
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call->offset = 0;
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call->unmarshall++;
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case 4:
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_debug("trailer");
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if (skb->len != 0)
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return -EBADMSG;
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break;
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}
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if (!last)
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return 0;
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if (call->count < PAGE_SIZE) {
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_debug("clear");
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page = call->reply3;
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buffer = kmap_atomic(page, KM_USER0);
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memset(buffer + call->count, 0, PAGE_SIZE - call->count);
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kunmap_atomic(buffer, KM_USER0);
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}
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_leave(" = 0 [done]");
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return 0;
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}
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/*
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* FS.FetchData operation type
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*/
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static const struct afs_call_type afs_RXFSFetchData = {
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.name = "FS.FetchData",
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.deliver = afs_deliver_fs_fetch_data,
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.abort_to_error = afs_abort_to_error,
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.destructor = afs_flat_call_destructor,
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};
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/*
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* fetch data from a file
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*/
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int afs_fs_fetch_data(struct afs_server *server,
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struct key *key,
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struct afs_vnode *vnode,
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off_t offset, size_t length,
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struct page *buffer,
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const struct afs_wait_mode *wait_mode)
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{
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struct afs_call *call;
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__be32 *bp;
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_enter("");
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call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
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if (!call)
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return -ENOMEM;
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call->key = key;
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call->reply = vnode;
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call->reply2 = NULL; /* volsync */
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call->reply3 = buffer;
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call->service_id = FS_SERVICE;
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call->port = htons(AFS_FS_PORT);
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/* marshall the parameters */
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bp = call->request;
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bp[0] = htonl(FSFETCHDATA);
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bp[1] = htonl(vnode->fid.vid);
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bp[2] = htonl(vnode->fid.vnode);
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bp[3] = htonl(vnode->fid.unique);
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bp[4] = htonl(offset);
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bp[5] = htonl(length);
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return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
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}
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/*
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* deliver reply data to an FS.GiveUpCallBacks
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*/
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static int afs_deliver_fs_give_up_callbacks(struct afs_call *call,
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struct sk_buff *skb, bool last)
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{
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_enter(",{%u},%d", skb->len, last);
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if (skb->len > 0)
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return -EBADMSG; /* shouldn't be any reply data */
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return 0;
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}
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/*
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* FS.GiveUpCallBacks operation type
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*/
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static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
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.name = "FS.GiveUpCallBacks",
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.deliver = afs_deliver_fs_give_up_callbacks,
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.abort_to_error = afs_abort_to_error,
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.destructor = afs_flat_call_destructor,
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};
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/*
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* give up a set of callbacks
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* - the callbacks are held in the server->cb_break ring
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*/
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int afs_fs_give_up_callbacks(struct afs_server *server,
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const struct afs_wait_mode *wait_mode)
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{
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struct afs_call *call;
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size_t ncallbacks;
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__be32 *bp, *tp;
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int loop;
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ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
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ARRAY_SIZE(server->cb_break));
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_enter("{%zu},", ncallbacks);
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if (ncallbacks == 0)
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return 0;
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if (ncallbacks > AFSCBMAX)
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ncallbacks = AFSCBMAX;
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_debug("break %zu callbacks", ncallbacks);
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call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
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12 + ncallbacks * 6 * 4, 0);
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if (!call)
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return -ENOMEM;
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call->service_id = FS_SERVICE;
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call->port = htons(AFS_FS_PORT);
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/* marshall the parameters */
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bp = call->request;
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tp = bp + 2 + ncallbacks * 3;
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*bp++ = htonl(FSGIVEUPCALLBACKS);
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*bp++ = htonl(ncallbacks);
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*tp++ = htonl(ncallbacks);
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atomic_sub(ncallbacks, &server->cb_break_n);
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for (loop = ncallbacks; loop > 0; loop--) {
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struct afs_callback *cb =
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&server->cb_break[server->cb_break_tail];
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*bp++ = htonl(cb->fid.vid);
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*bp++ = htonl(cb->fid.vnode);
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*bp++ = htonl(cb->fid.unique);
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*tp++ = htonl(cb->version);
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*tp++ = htonl(cb->expiry);
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*tp++ = htonl(cb->type);
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smp_mb();
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server->cb_break_tail =
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(server->cb_break_tail + 1) &
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(ARRAY_SIZE(server->cb_break) - 1);
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}
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ASSERT(ncallbacks > 0);
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wake_up_nr(&server->cb_break_waitq, ncallbacks);
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return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
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}
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|
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/*
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* deliver reply data to an FS.CreateFile or an FS.MakeDir
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*/
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static int afs_deliver_fs_create_vnode(struct afs_call *call,
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struct sk_buff *skb, bool last)
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{
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struct afs_vnode *vnode = call->reply;
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const __be32 *bp;
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_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
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afs_transfer_reply(call, skb);
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if (!last)
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return 0;
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if (call->reply_size != call->reply_max)
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return -EBADMSG;
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|
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/* unmarshall the reply once we've received all of it */
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bp = call->buffer;
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xdr_decode_AFSFid(&bp, call->reply2);
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xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
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xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
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xdr_decode_AFSCallBack_raw(&bp, call->reply4);
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/* xdr_decode_AFSVolSync(&bp, call->replyX); */
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_leave(" = 0 [done]");
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return 0;
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}
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|
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/*
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* FS.CreateFile and FS.MakeDir operation type
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*/
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static const struct afs_call_type afs_RXFSCreateXXXX = {
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.name = "FS.CreateXXXX",
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.deliver = afs_deliver_fs_create_vnode,
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.abort_to_error = afs_abort_to_error,
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.destructor = afs_flat_call_destructor,
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};
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/*
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* create a file or make a directory
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*/
|
|
int afs_fs_create(struct afs_server *server,
|
|
struct key *key,
|
|
struct afs_vnode *vnode,
|
|
const char *name,
|
|
umode_t mode,
|
|
struct afs_fid *newfid,
|
|
struct afs_file_status *newstatus,
|
|
struct afs_callback *newcb,
|
|
const struct afs_wait_mode *wait_mode)
|
|
{
|
|
struct afs_call *call;
|
|
size_t namesz, reqsz, padsz;
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
namesz = strlen(name);
|
|
padsz = (4 - (namesz & 3)) & 3;
|
|
reqsz = (5 * 4) + namesz + padsz + (6 * 4);
|
|
|
|
call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
|
|
(3 + 21 + 21 + 3 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = key;
|
|
call->reply = vnode;
|
|
call->reply2 = newfid;
|
|
call->reply3 = newstatus;
|
|
call->reply4 = newcb;
|
|
call->service_id = FS_SERVICE;
|
|
call->port = htons(AFS_FS_PORT);
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
*bp++ = htonl(namesz);
|
|
memcpy(bp, name, namesz);
|
|
bp = (void *) bp + namesz;
|
|
if (padsz > 0) {
|
|
memset(bp, 0, padsz);
|
|
bp = (void *) bp + padsz;
|
|
}
|
|
*bp++ = htonl(AFS_SET_MODE);
|
|
*bp++ = 0; /* mtime */
|
|
*bp++ = 0; /* owner */
|
|
*bp++ = 0; /* group */
|
|
*bp++ = htonl(mode & S_IALLUGO); /* unix mode */
|
|
*bp++ = 0; /* segment size */
|
|
|
|
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.RemoveFile or FS.RemoveDir
|
|
*/
|
|
static int afs_deliver_fs_remove(struct afs_call *call,
|
|
struct sk_buff *skb, bool last)
|
|
{
|
|
struct afs_vnode *vnode = call->reply;
|
|
const __be32 *bp;
|
|
|
|
_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
|
|
|
|
afs_transfer_reply(call, skb);
|
|
if (!last)
|
|
return 0;
|
|
|
|
if (call->reply_size != call->reply_max)
|
|
return -EBADMSG;
|
|
|
|
/* unmarshall the reply once we've received all of it */
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
|
|
/* xdr_decode_AFSVolSync(&bp, call->replyX); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.RemoveDir/FS.RemoveFile operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSRemoveXXXX = {
|
|
.name = "FS.RemoveXXXX",
|
|
.deliver = afs_deliver_fs_remove,
|
|
.abort_to_error = afs_abort_to_error,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* remove a file or directory
|
|
*/
|
|
int afs_fs_remove(struct afs_server *server,
|
|
struct key *key,
|
|
struct afs_vnode *vnode,
|
|
const char *name,
|
|
bool isdir,
|
|
const struct afs_wait_mode *wait_mode)
|
|
{
|
|
struct afs_call *call;
|
|
size_t namesz, reqsz, padsz;
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
namesz = strlen(name);
|
|
padsz = (4 - (namesz & 3)) & 3;
|
|
reqsz = (5 * 4) + namesz + padsz;
|
|
|
|
call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = key;
|
|
call->reply = vnode;
|
|
call->service_id = FS_SERVICE;
|
|
call->port = htons(AFS_FS_PORT);
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
*bp++ = htonl(namesz);
|
|
memcpy(bp, name, namesz);
|
|
bp = (void *) bp + namesz;
|
|
if (padsz > 0) {
|
|
memset(bp, 0, padsz);
|
|
bp = (void *) bp + padsz;
|
|
}
|
|
|
|
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.Link
|
|
*/
|
|
static int afs_deliver_fs_link(struct afs_call *call,
|
|
struct sk_buff *skb, bool last)
|
|
{
|
|
struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
|
|
const __be32 *bp;
|
|
|
|
_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
|
|
|
|
afs_transfer_reply(call, skb);
|
|
if (!last)
|
|
return 0;
|
|
|
|
if (call->reply_size != call->reply_max)
|
|
return -EBADMSG;
|
|
|
|
/* unmarshall the reply once we've received all of it */
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
|
|
xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode);
|
|
/* xdr_decode_AFSVolSync(&bp, call->replyX); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.Link operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSLink = {
|
|
.name = "FS.Link",
|
|
.deliver = afs_deliver_fs_link,
|
|
.abort_to_error = afs_abort_to_error,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* make a hard link
|
|
*/
|
|
int afs_fs_link(struct afs_server *server,
|
|
struct key *key,
|
|
struct afs_vnode *dvnode,
|
|
struct afs_vnode *vnode,
|
|
const char *name,
|
|
const struct afs_wait_mode *wait_mode)
|
|
{
|
|
struct afs_call *call;
|
|
size_t namesz, reqsz, padsz;
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
namesz = strlen(name);
|
|
padsz = (4 - (namesz & 3)) & 3;
|
|
reqsz = (5 * 4) + namesz + padsz + (3 * 4);
|
|
|
|
call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = key;
|
|
call->reply = dvnode;
|
|
call->reply2 = vnode;
|
|
call->service_id = FS_SERVICE;
|
|
call->port = htons(AFS_FS_PORT);
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSLINK);
|
|
*bp++ = htonl(dvnode->fid.vid);
|
|
*bp++ = htonl(dvnode->fid.vnode);
|
|
*bp++ = htonl(dvnode->fid.unique);
|
|
*bp++ = htonl(namesz);
|
|
memcpy(bp, name, namesz);
|
|
bp = (void *) bp + namesz;
|
|
if (padsz > 0) {
|
|
memset(bp, 0, padsz);
|
|
bp = (void *) bp + padsz;
|
|
}
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.Symlink
|
|
*/
|
|
static int afs_deliver_fs_symlink(struct afs_call *call,
|
|
struct sk_buff *skb, bool last)
|
|
{
|
|
struct afs_vnode *vnode = call->reply;
|
|
const __be32 *bp;
|
|
|
|
_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
|
|
|
|
afs_transfer_reply(call, skb);
|
|
if (!last)
|
|
return 0;
|
|
|
|
if (call->reply_size != call->reply_max)
|
|
return -EBADMSG;
|
|
|
|
/* unmarshall the reply once we've received all of it */
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFid(&bp, call->reply2);
|
|
xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
|
|
/* xdr_decode_AFSVolSync(&bp, call->replyX); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.Symlink operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSSymlink = {
|
|
.name = "FS.Symlink",
|
|
.deliver = afs_deliver_fs_symlink,
|
|
.abort_to_error = afs_abort_to_error,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* create a symbolic link
|
|
*/
|
|
int afs_fs_symlink(struct afs_server *server,
|
|
struct key *key,
|
|
struct afs_vnode *vnode,
|
|
const char *name,
|
|
const char *contents,
|
|
struct afs_fid *newfid,
|
|
struct afs_file_status *newstatus,
|
|
const struct afs_wait_mode *wait_mode)
|
|
{
|
|
struct afs_call *call;
|
|
size_t namesz, reqsz, padsz, c_namesz, c_padsz;
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
namesz = strlen(name);
|
|
padsz = (4 - (namesz & 3)) & 3;
|
|
|
|
c_namesz = strlen(contents);
|
|
c_padsz = (4 - (c_namesz & 3)) & 3;
|
|
|
|
reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
|
|
|
|
call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
|
|
(3 + 21 + 21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = key;
|
|
call->reply = vnode;
|
|
call->reply2 = newfid;
|
|
call->reply3 = newstatus;
|
|
call->service_id = FS_SERVICE;
|
|
call->port = htons(AFS_FS_PORT);
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSYMLINK);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
*bp++ = htonl(namesz);
|
|
memcpy(bp, name, namesz);
|
|
bp = (void *) bp + namesz;
|
|
if (padsz > 0) {
|
|
memset(bp, 0, padsz);
|
|
bp = (void *) bp + padsz;
|
|
}
|
|
*bp++ = htonl(c_namesz);
|
|
memcpy(bp, contents, 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);
|
|
*bp++ = 0; /* mtime */
|
|
*bp++ = 0; /* owner */
|
|
*bp++ = 0; /* group */
|
|
*bp++ = htonl(S_IRWXUGO); /* unix mode */
|
|
*bp++ = 0; /* segment size */
|
|
|
|
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.Rename
|
|
*/
|
|
static int afs_deliver_fs_rename(struct afs_call *call,
|
|
struct sk_buff *skb, bool last)
|
|
{
|
|
struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
|
|
const __be32 *bp;
|
|
|
|
_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
|
|
|
|
afs_transfer_reply(call, skb);
|
|
if (!last)
|
|
return 0;
|
|
|
|
if (call->reply_size != call->reply_max)
|
|
return -EBADMSG;
|
|
|
|
/* unmarshall the reply once we've received all of it */
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode);
|
|
if (new_dvnode != orig_dvnode)
|
|
xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode);
|
|
/* xdr_decode_AFSVolSync(&bp, call->replyX); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.Rename operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSRename = {
|
|
.name = "FS.Rename",
|
|
.deliver = afs_deliver_fs_rename,
|
|
.abort_to_error = afs_abort_to_error,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* create a symbolic link
|
|
*/
|
|
int afs_fs_rename(struct afs_server *server,
|
|
struct key *key,
|
|
struct afs_vnode *orig_dvnode,
|
|
const char *orig_name,
|
|
struct afs_vnode *new_dvnode,
|
|
const char *new_name,
|
|
const struct afs_wait_mode *wait_mode)
|
|
{
|
|
struct afs_call *call;
|
|
size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
o_namesz = strlen(orig_name);
|
|
o_padsz = (4 - (o_namesz & 3)) & 3;
|
|
|
|
n_namesz = strlen(new_name);
|
|
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(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = key;
|
|
call->reply = orig_dvnode;
|
|
call->reply2 = new_dvnode;
|
|
call->service_id = FS_SERVICE;
|
|
call->port = htons(AFS_FS_PORT);
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSRENAME);
|
|
*bp++ = htonl(orig_dvnode->fid.vid);
|
|
*bp++ = htonl(orig_dvnode->fid.vnode);
|
|
*bp++ = htonl(orig_dvnode->fid.unique);
|
|
*bp++ = htonl(o_namesz);
|
|
memcpy(bp, orig_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_dvnode->fid.vid);
|
|
*bp++ = htonl(new_dvnode->fid.vnode);
|
|
*bp++ = htonl(new_dvnode->fid.unique);
|
|
*bp++ = htonl(n_namesz);
|
|
memcpy(bp, new_name, n_namesz);
|
|
bp = (void *) bp + n_namesz;
|
|
if (n_padsz > 0) {
|
|
memset(bp, 0, n_padsz);
|
|
bp = (void *) bp + n_padsz;
|
|
}
|
|
|
|
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
|
|
}
|