forked from Minki/linux
d2ddc776a4
The current code assumes that volumes and servers are per-cell and are
never shared, but this is not enforced, and, indeed, public cells do exist
that are aliases of each other. Further, an organisation can, say, set up
a public cell and a private cell with overlapping, but not identical, sets
of servers. The difference is purely in the database attached to the VL
servers.
The current code will malfunction if it sees a server in two cells as it
assumes global address -> server record mappings and that each server is in
just one cell.
Further, each server may have multiple addresses - and may have addresses
of different families (IPv4 and IPv6, say).
To this end, the following structural changes are made:
(1) Server record management is overhauled:
(a) Server records are made independent of cell. The namespace keeps
track of them, volume records have lists of them and each vnode
has a server on which its callback interest currently resides.
(b) The cell record no longer keeps a list of servers known to be in
that cell.
(c) The server records are now kept in a flat list because there's no
single address to sort on.
(d) Server records are now keyed by their UUID within the namespace.
(e) The addresses for a server are obtained with the VL.GetAddrsU
rather than with VL.GetEntryByName, using the server's UUID as a
parameter.
(f) Cached server records are garbage collected after a period of
non-use and are counted out of existence before purging is allowed
to complete. This protects the work functions against rmmod.
(g) The servers list is now in /proc/fs/afs/servers.
(2) Volume record management is overhauled:
(a) An RCU-replaceable server list is introduced. This tracks both
servers and their coresponding callback interests.
(b) The superblock is now keyed on cell record and numeric volume ID.
(c) The volume record is now tied to the superblock which mounts it,
and is activated when mounted and deactivated when unmounted.
This makes it easier to handle the cache cookie without causing a
double-use in fscache.
(d) The volume record is loaded from the VLDB using VL.GetEntryByNameU
to get the server UUID list.
(e) The volume name is updated if it is seen to have changed when the
volume is updated (the update is keyed on the volume ID).
(3) The vlocation record is got rid of and VLDB records are no longer
cached. Sufficient information is stored in the volume record, though
an update to a volume record is now no longer shared between related
volumes (volumes come in bundles of three: R/W, R/O and backup).
and the following procedural changes are made:
(1) The fileserver cursor introduced previously is now fleshed out and
used to iterate over fileservers and their addresses.
(2) Volume status is checked during iteration, and the server list is
replaced if a change is detected.
(3) Server status is checked during iteration, and the address list is
replaced if a change is detected.
(4) The abort code is saved into the address list cursor and -ECONNABORTED
returned in afs_make_call() if a remote abort happened rather than
translating the abort into an error message. This allows actions to
be taken depending on the abort code more easily.
(a) If a VMOVED abort is seen then this is handled by rechecking the
volume and restarting the iteration.
(b) If a VBUSY, VRESTARTING or VSALVAGING abort is seen then this is
handled by sleeping for a short period and retrying and/or trying
other servers that might serve that volume. A message is also
displayed once until the condition has cleared.
(c) If a VOFFLINE abort is seen, then this is handled as VBUSY for the
moment.
(d) If a VNOVOL abort is seen, the volume is rechecked in the VLDB to
see if it has been deleted; if not, the fileserver is probably
indicating that the volume couldn't be attached and needs
salvaging.
(e) If statfs() sees one of these aborts, it does not sleep, but
rather returns an error, so as not to block the umount program.
(5) The fileserver iteration functions in vnode.c are now merged into
their callers and more heavily macroised around the cursor. vnode.c
is removed.
(6) Operations on a particular vnode are serialised on that vnode because
the server will lock that vnode whilst it operates on it, so a second
op sent will just have to wait.
(7) Fileservers are probed with FS.GetCapabilities before being used.
This is where service upgrade will be done.
(8) A callback interest on a fileserver is set up before an FS operation
is performed and passed through to afs_make_call() so that it can be
set on the vnode if the operation returns a callback. The callback
interest is passed through to afs_iget() also so that it can be set
there too.
In general, record updating is done on an as-needed basis when we try to
access servers, volumes or vnodes rather than offloading it to work items
and special threads.
Notes:
(1) Pre AFS-3.4 servers are no longer supported, though this can be added
back if necessary (AFS-3.4 was released in 1998).
(2) VBUSY is retried forever for the moment at intervals of 1s.
(3) /proc/fs/afs/<cell>/servers no longer exists.
Signed-off-by: David Howells <dhowells@redhat.com>
1900 lines
44 KiB
C
1900 lines
44 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/slab.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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* We need somewhere to discard into in case the server helpfully returns more
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* than we asked for in FS.FetchData{,64}.
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*/
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static u8 afs_discard_buffer[64];
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static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
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{
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call->cbi = afs_get_cb_interest(cbi);
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}
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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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afs_dataversion_t *store_version)
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{
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afs_dataversion_t expected_version;
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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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bool changed = false;
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kuid_t owner;
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kgid_t group;
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if (vnode)
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write_seqlock(&vnode->cb_lock);
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#define EXTRACT(DST) \
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do { \
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u32 x = ntohl(*bp++); \
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if (DST != x) \
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changed |= true; \
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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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owner = make_kuid(&init_user_ns, ntohl(*bp++));
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changed |= !uid_eq(owner, status->owner);
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status->owner = 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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bp++; /* parent.vnode */
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bp++; /* 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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group = make_kgid(&init_user_ns, ntohl(*bp++));
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changed |= !gid_eq(group, status->group);
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status->group = group;
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bp++; /* sync counter */
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data_version |= (u64) ntohl(*bp++) << 32;
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EXTRACT(status->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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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_generation = vnode->fid.unique;
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set_nlink(&vnode->vfs_inode, 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_client;
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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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vnode->vfs_inode.i_version = data_version;
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}
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expected_version = status->data_version;
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if (store_version)
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expected_version = *store_version;
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if (expected_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_DIR_MODIFIED, &vnode->flags);
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set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
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}
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} else if (store_version) {
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status->data_version = data_version;
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}
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if (vnode)
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write_sequnlock(&vnode->cb_lock);
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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(struct afs_call *call,
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struct afs_vnode *vnode,
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const __be32 **_bp)
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{
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struct afs_cb_interest *old, *cbi = call->cbi;
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const __be32 *bp = *_bp;
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u32 cb_expiry;
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write_seqlock(&vnode->cb_lock);
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if (call->cb_break == (vnode->cb_break + cbi->server->cb_s_break)) {
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vnode->cb_version = ntohl(*bp++);
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cb_expiry = ntohl(*bp++);
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vnode->cb_type = ntohl(*bp++);
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vnode->cb_expires_at = cb_expiry + ktime_get_real_seconds();
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old = vnode->cb_interest;
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if (old != call->cbi) {
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vnode->cb_interest = cbi;
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cbi = old;
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}
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set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
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} else {
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bp += 3;
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}
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write_sequnlock(&vnode->cb_lock);
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call->cbi = cbi;
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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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* encode the requested attributes into an AFSStoreStatus block
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*/
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static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
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{
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__be32 *bp = *_bp;
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u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
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mask = 0;
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if (attr->ia_valid & ATTR_MTIME) {
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mask |= AFS_SET_MTIME;
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mtime = attr->ia_mtime.tv_sec;
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}
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if (attr->ia_valid & ATTR_UID) {
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mask |= AFS_SET_OWNER;
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owner = from_kuid(&init_user_ns, attr->ia_uid);
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}
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if (attr->ia_valid & ATTR_GID) {
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mask |= AFS_SET_GROUP;
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group = from_kgid(&init_user_ns, attr->ia_gid);
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}
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if (attr->ia_valid & ATTR_MODE) {
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mask |= AFS_SET_MODE;
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mode = attr->ia_mode & S_IALLUGO;
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}
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*bp++ = htonl(mask);
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*bp++ = htonl(mtime);
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*bp++ = htonl(owner);
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*bp++ = htonl(group);
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*bp++ = htonl(mode);
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*bp++ = 0; /* segment size */
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*_bp = bp;
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}
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/*
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* decode an AFSFetchVolumeStatus block
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*/
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static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
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struct afs_volume_status *vs)
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{
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const __be32 *bp = *_bp;
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vs->vid = ntohl(*bp++);
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vs->parent_id = ntohl(*bp++);
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vs->online = ntohl(*bp++);
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vs->in_service = ntohl(*bp++);
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vs->blessed = ntohl(*bp++);
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vs->needs_salvage = ntohl(*bp++);
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vs->type = ntohl(*bp++);
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vs->min_quota = ntohl(*bp++);
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vs->max_quota = ntohl(*bp++);
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vs->blocks_in_use = ntohl(*bp++);
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vs->part_blocks_avail = ntohl(*bp++);
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vs->part_max_blocks = ntohl(*bp++);
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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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{
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struct afs_vnode *vnode = call->reply[0];
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const __be32 *bp;
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int ret;
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ret = afs_transfer_reply(call);
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if (ret < 0)
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return ret;
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_enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
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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, NULL);
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xdr_decode_AFSCallBack(call, vnode, &bp);
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if (call->reply[1])
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xdr_decode_AFSVolSync(&bp, call->reply[1]);
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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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.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_fs_cursor *fc, struct afs_volsync *volsync)
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{
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struct afs_vnode *vnode = fc->vnode;
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struct afs_call *call;
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struct afs_net *net = afs_v2net(vnode);
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__be32 *bp;
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_enter(",%x,{%x:%u},,",
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key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
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call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
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if (!call) {
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fc->ac.error = -ENOMEM;
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return -ENOMEM;
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}
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call->key = fc->key;
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call->reply[0] = vnode;
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call->reply[1] = volsync;
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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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call->cb_break = fc->cb_break;
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afs_use_fs_server(call, fc->cbi);
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return afs_make_call(&fc->ac, call, GFP_NOFS, false);
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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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{
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struct afs_vnode *vnode = call->reply[0];
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struct afs_read *req = call->reply[2];
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const __be32 *bp;
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unsigned int size;
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void *buffer;
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int ret;
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_enter("{%u,%zu/%u;%llu/%llu}",
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call->unmarshall, call->offset, call->count,
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req->remain, req->actual_len);
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switch (call->unmarshall) {
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case 0:
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req->actual_len = 0;
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call->offset = 0;
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call->unmarshall++;
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if (call->operation_ID != FSFETCHDATA64) {
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call->unmarshall++;
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goto no_msw;
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}
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/* extract the upper part of the returned data length of an
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* FSFETCHDATA64 op (which should always be 0 using this
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* client) */
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case 1:
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_debug("extract data length (MSW)");
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ret = afs_extract_data(call, &call->tmp, 4, true);
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if (ret < 0)
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return ret;
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req->actual_len = ntohl(call->tmp);
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req->actual_len <<= 32;
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call->offset = 0;
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call->unmarshall++;
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no_msw:
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/* extract the returned data length */
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case 2:
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_debug("extract data length");
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ret = afs_extract_data(call, &call->tmp, 4, true);
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if (ret < 0)
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return ret;
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req->actual_len |= ntohl(call->tmp);
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_debug("DATA length: %llu", req->actual_len);
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req->remain = req->actual_len;
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call->offset = req->pos & (PAGE_SIZE - 1);
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req->index = 0;
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if (req->actual_len == 0)
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goto no_more_data;
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call->unmarshall++;
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begin_page:
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ASSERTCMP(req->index, <, req->nr_pages);
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if (req->remain > PAGE_SIZE - call->offset)
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size = PAGE_SIZE - call->offset;
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else
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size = req->remain;
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call->count = call->offset + size;
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ASSERTCMP(call->count, <=, PAGE_SIZE);
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req->remain -= size;
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|
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/* extract the returned data */
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case 3:
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_debug("extract data %llu/%llu %zu/%u",
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req->remain, req->actual_len, call->offset, call->count);
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buffer = kmap(req->pages[req->index]);
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ret = afs_extract_data(call, buffer, call->count, true);
|
|
kunmap(req->pages[req->index]);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (call->offset == PAGE_SIZE) {
|
|
if (req->page_done)
|
|
req->page_done(call, req);
|
|
req->index++;
|
|
if (req->remain > 0) {
|
|
call->offset = 0;
|
|
if (req->index >= req->nr_pages) {
|
|
call->unmarshall = 4;
|
|
goto begin_discard;
|
|
}
|
|
goto begin_page;
|
|
}
|
|
}
|
|
goto no_more_data;
|
|
|
|
/* Discard any excess data the server gave us */
|
|
begin_discard:
|
|
case 4:
|
|
size = min_t(loff_t, sizeof(afs_discard_buffer), req->remain);
|
|
call->count = size;
|
|
_debug("extract discard %llu/%llu %zu/%u",
|
|
req->remain, req->actual_len, call->offset, call->count);
|
|
|
|
call->offset = 0;
|
|
ret = afs_extract_data(call, afs_discard_buffer, call->count, true);
|
|
req->remain -= call->offset;
|
|
if (ret < 0)
|
|
return ret;
|
|
if (req->remain > 0)
|
|
goto begin_discard;
|
|
|
|
no_more_data:
|
|
call->offset = 0;
|
|
call->unmarshall = 5;
|
|
|
|
/* extract the metadata */
|
|
case 5:
|
|
ret = afs_extract_data(call, call->buffer,
|
|
(21 + 3 + 6) * 4, false);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
|
|
xdr_decode_AFSCallBack(call, vnode, &bp);
|
|
if (call->reply[1])
|
|
xdr_decode_AFSVolSync(&bp, call->reply[1]);
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
case 6:
|
|
break;
|
|
}
|
|
|
|
for (; req->index < req->nr_pages; req->index++) {
|
|
if (call->count < PAGE_SIZE)
|
|
zero_user_segment(req->pages[req->index],
|
|
call->count, PAGE_SIZE);
|
|
if (req->page_done)
|
|
req->page_done(call, req);
|
|
call->count = 0;
|
|
}
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
static void afs_fetch_data_destructor(struct afs_call *call)
|
|
{
|
|
struct afs_read *req = call->reply[2];
|
|
|
|
afs_put_read(req);
|
|
afs_flat_call_destructor(call);
|
|
}
|
|
|
|
/*
|
|
* FS.FetchData operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSFetchData = {
|
|
.name = "FS.FetchData",
|
|
.deliver = afs_deliver_fs_fetch_data,
|
|
.destructor = afs_fetch_data_destructor,
|
|
};
|
|
|
|
static const struct afs_call_type afs_RXFSFetchData64 = {
|
|
.name = "FS.FetchData64",
|
|
.deliver = afs_deliver_fs_fetch_data,
|
|
.destructor = afs_fetch_data_destructor,
|
|
};
|
|
|
|
/*
|
|
* fetch data from a very large file
|
|
*/
|
|
static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->reply[1] = NULL; /* volsync */
|
|
call->reply[2] = req;
|
|
call->operation_ID = FSFETCHDATA64;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
bp[0] = htonl(FSFETCHDATA64);
|
|
bp[1] = htonl(vnode->fid.vid);
|
|
bp[2] = htonl(vnode->fid.vnode);
|
|
bp[3] = htonl(vnode->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));
|
|
|
|
atomic_inc(&req->usage);
|
|
call->cb_break = fc->cb_break;
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* fetch data from a file
|
|
*/
|
|
int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__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(fc, req);
|
|
|
|
_enter("");
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->reply[1] = NULL; /* volsync */
|
|
call->reply[2] = req;
|
|
call->operation_ID = FSFETCHDATA;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
bp[0] = htonl(FSFETCHDATA);
|
|
bp[1] = htonl(vnode->fid.vid);
|
|
bp[2] = htonl(vnode->fid.vnode);
|
|
bp[3] = htonl(vnode->fid.unique);
|
|
bp[4] = htonl(lower_32_bits(req->pos));
|
|
bp[5] = htonl(lower_32_bits(req->len));
|
|
|
|
atomic_inc(&req->usage);
|
|
call->cb_break = fc->cb_break;
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.CreateFile or an FS.MakeDir
|
|
*/
|
|
static int afs_deliver_fs_create_vnode(struct afs_call *call)
|
|
{
|
|
struct afs_vnode *vnode = call->reply[0];
|
|
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, call->reply[1]);
|
|
xdr_decode_AFSFetchStatus(&bp, call->reply[2], NULL, NULL);
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
|
|
xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.CreateFile and FS.MakeDir operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSCreateXXXX = {
|
|
.name = "FS.CreateXXXX",
|
|
.deliver = afs_deliver_fs_create_vnode,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* create a file or make a directory
|
|
*/
|
|
int afs_fs_create(struct afs_fs_cursor *fc,
|
|
const char *name,
|
|
umode_t mode,
|
|
struct afs_fid *newfid,
|
|
struct afs_file_status *newstatus,
|
|
struct afs_callback *newcb)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
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(net, &afs_RXFSCreateXXXX, reqsz,
|
|
(3 + 21 + 21 + 3 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->reply[1] = newfid;
|
|
call->reply[2] = newstatus;
|
|
call->reply[3] = newcb;
|
|
|
|
/* 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 | AFS_SET_MTIME);
|
|
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
|
|
*bp++ = 0; /* owner */
|
|
*bp++ = 0; /* group */
|
|
*bp++ = htonl(mode & S_IALLUGO); /* unix mode */
|
|
*bp++ = 0; /* segment size */
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.RemoveFile or FS.RemoveDir
|
|
*/
|
|
static int afs_deliver_fs_remove(struct afs_call *call)
|
|
{
|
|
struct afs_vnode *vnode = call->reply[0];
|
|
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, &vnode->status, vnode, NULL);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
_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,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* remove a file or directory
|
|
*/
|
|
int afs_fs_remove(struct afs_fs_cursor *fc, const char *name, bool isdir)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
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(net, &afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.Link
|
|
*/
|
|
static int afs_deliver_fs_link(struct afs_call *call)
|
|
{
|
|
struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[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, &vnode->status, vnode, NULL);
|
|
xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
_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,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* make a hard link
|
|
*/
|
|
int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
|
|
const char *name)
|
|
{
|
|
struct afs_vnode *dvnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
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(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = dvnode;
|
|
call->reply[1] = vnode;
|
|
|
|
/* 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);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.Symlink
|
|
*/
|
|
static int afs_deliver_fs_symlink(struct afs_call *call)
|
|
{
|
|
struct afs_vnode *vnode = call->reply[0];
|
|
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, call->reply[1]);
|
|
xdr_decode_AFSFetchStatus(&bp, call->reply[2], NULL, NULL);
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
_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,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* create a symbolic link
|
|
*/
|
|
int afs_fs_symlink(struct afs_fs_cursor *fc,
|
|
const char *name,
|
|
const char *contents,
|
|
struct afs_fid *newfid,
|
|
struct afs_file_status *newstatus)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
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(net, &afs_RXFSSymlink, reqsz,
|
|
(3 + 21 + 21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->reply[1] = newfid;
|
|
call->reply[2] = newstatus;
|
|
|
|
/* 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 | AFS_SET_MTIME);
|
|
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
|
|
*bp++ = 0; /* owner */
|
|
*bp++ = 0; /* group */
|
|
*bp++ = htonl(S_IRWXUGO); /* unix mode */
|
|
*bp++ = 0; /* segment size */
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.Rename
|
|
*/
|
|
static int afs_deliver_fs_rename(struct afs_call *call)
|
|
{
|
|
struct afs_vnode *orig_dvnode = call->reply[0], *new_dvnode = call->reply[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, &orig_dvnode->status, orig_dvnode, NULL);
|
|
if (new_dvnode != orig_dvnode)
|
|
xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
|
|
NULL);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
_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,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* create a symbolic link
|
|
*/
|
|
int afs_fs_rename(struct afs_fs_cursor *fc,
|
|
const char *orig_name,
|
|
struct afs_vnode *new_dvnode,
|
|
const char *new_name)
|
|
{
|
|
struct afs_vnode *orig_dvnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(orig_dvnode);
|
|
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(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = orig_dvnode;
|
|
call->reply[1] = new_dvnode;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.StoreData
|
|
*/
|
|
static int afs_deliver_fs_store_data(struct afs_call *call)
|
|
{
|
|
struct afs_vnode *vnode = call->reply[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, &vnode->status, vnode,
|
|
&call->store_version);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
afs_pages_written_back(vnode, call);
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.StoreData operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSStoreData = {
|
|
.name = "FS.StoreData",
|
|
.deliver = afs_deliver_fs_store_data,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
static const struct afs_call_type afs_RXFSStoreData64 = {
|
|
.name = "FS.StoreData64",
|
|
.deliver = afs_deliver_fs_store_data,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* store a set of pages to a very large file
|
|
*/
|
|
static int afs_fs_store_data64(struct afs_fs_cursor *fc,
|
|
struct afs_writeback *wb,
|
|
pgoff_t first, pgoff_t last,
|
|
unsigned offset, unsigned to,
|
|
loff_t size, loff_t pos, loff_t i_size)
|
|
{
|
|
struct afs_vnode *vnode = wb->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter(",%x,{%x:%u},,",
|
|
key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
|
|
(4 + 6 + 3 * 2) * 4,
|
|
(21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->wb = wb;
|
|
call->key = wb->key;
|
|
call->reply[0] = vnode;
|
|
call->mapping = vnode->vfs_inode.i_mapping;
|
|
call->first = first;
|
|
call->last = last;
|
|
call->first_offset = offset;
|
|
call->last_to = to;
|
|
call->send_pages = true;
|
|
call->store_version = vnode->status.data_version + 1;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSTOREDATA64);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
*bp++ = htonl(AFS_SET_MTIME); /* mask */
|
|
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
|
|
*bp++ = 0; /* owner */
|
|
*bp++ = 0; /* group */
|
|
*bp++ = 0; /* unix mode */
|
|
*bp++ = 0; /* segment size */
|
|
|
|
*bp++ = htonl(pos >> 32);
|
|
*bp++ = htonl((u32) pos);
|
|
*bp++ = htonl(size >> 32);
|
|
*bp++ = htonl((u32) size);
|
|
*bp++ = htonl(i_size >> 32);
|
|
*bp++ = htonl((u32) i_size);
|
|
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* store a set of pages
|
|
*/
|
|
int afs_fs_store_data(struct afs_fs_cursor *fc, struct afs_writeback *wb,
|
|
pgoff_t first, pgoff_t last,
|
|
unsigned offset, unsigned to)
|
|
{
|
|
struct afs_vnode *vnode = wb->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
loff_t size, pos, i_size;
|
|
__be32 *bp;
|
|
|
|
_enter(",%x,{%x:%u},,",
|
|
key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
|
|
|
|
size = (loff_t)to - (loff_t)offset;
|
|
if (first != last)
|
|
size += (loff_t)(last - first) << PAGE_SHIFT;
|
|
pos = (loff_t)first << PAGE_SHIFT;
|
|
pos += offset;
|
|
|
|
i_size = i_size_read(&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 (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
|
|
return afs_fs_store_data64(fc, wb, first, last, offset, to,
|
|
size, pos, i_size);
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
|
|
(4 + 6 + 3) * 4,
|
|
(21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->wb = wb;
|
|
call->key = wb->key;
|
|
call->reply[0] = vnode;
|
|
call->mapping = vnode->vfs_inode.i_mapping;
|
|
call->first = first;
|
|
call->last = last;
|
|
call->first_offset = offset;
|
|
call->last_to = to;
|
|
call->send_pages = true;
|
|
call->store_version = vnode->status.data_version + 1;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSTOREDATA);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
*bp++ = htonl(AFS_SET_MTIME); /* mask */
|
|
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
|
|
*bp++ = 0; /* owner */
|
|
*bp++ = 0; /* group */
|
|
*bp++ = 0; /* unix mode */
|
|
*bp++ = 0; /* segment size */
|
|
|
|
*bp++ = htonl(pos);
|
|
*bp++ = htonl(size);
|
|
*bp++ = htonl(i_size);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.StoreStatus
|
|
*/
|
|
static int afs_deliver_fs_store_status(struct afs_call *call)
|
|
{
|
|
afs_dataversion_t *store_version;
|
|
struct afs_vnode *vnode = call->reply[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 */
|
|
store_version = NULL;
|
|
if (call->operation_ID == FSSTOREDATA)
|
|
store_version = &call->store_version;
|
|
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
|
|
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.StoreStatus operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSStoreStatus = {
|
|
.name = "FS.StoreStatus",
|
|
.deliver = afs_deliver_fs_store_status,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
static const struct afs_call_type afs_RXFSStoreData_as_Status = {
|
|
.name = "FS.StoreData",
|
|
.deliver = afs_deliver_fs_store_status,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
|
|
.name = "FS.StoreData64",
|
|
.deliver = afs_deliver_fs_store_status,
|
|
.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 int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter(",%x,{%x:%u},,",
|
|
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
|
|
|
|
ASSERT(attr->ia_valid & ATTR_SIZE);
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
|
|
(4 + 6 + 3 * 2) * 4,
|
|
(21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->store_version = vnode->status.data_version + 1;
|
|
call->operation_ID = FSSTOREDATA;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSTOREDATA64);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
xdr_encode_AFS_StoreStatus(&bp, attr);
|
|
|
|
*bp++ = 0; /* position of start of write */
|
|
*bp++ = 0;
|
|
*bp++ = 0; /* size of write */
|
|
*bp++ = 0;
|
|
*bp++ = htonl(attr->ia_size >> 32); /* new file length */
|
|
*bp++ = htonl((u32) attr->ia_size);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
|
|
* so as to alter the file size also
|
|
*/
|
|
static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter(",%x,{%x:%u},,",
|
|
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
|
|
|
|
ASSERT(attr->ia_valid & ATTR_SIZE);
|
|
if (attr->ia_size >> 32)
|
|
return afs_fs_setattr_size64(fc, attr);
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
|
|
(4 + 6 + 3) * 4,
|
|
(21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->store_version = vnode->status.data_version + 1;
|
|
call->operation_ID = FSSTOREDATA;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSTOREDATA);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
xdr_encode_AFS_StoreStatus(&bp, attr);
|
|
|
|
*bp++ = 0; /* position of start of write */
|
|
*bp++ = 0; /* size of write */
|
|
*bp++ = htonl(attr->ia_size); /* new file length */
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* set the attributes on a file, using FS.StoreData if there's a change in file
|
|
* size, and FS.StoreStatus otherwise
|
|
*/
|
|
int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
if (attr->ia_valid & ATTR_SIZE)
|
|
return afs_fs_setattr_size(fc, attr);
|
|
|
|
_enter(",%x,{%x:%u},,",
|
|
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
|
|
(4 + 6) * 4,
|
|
(21 + 6) * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->operation_ID = FSSTORESTATUS;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSTORESTATUS);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
xdr_encode_AFS_StoreStatus(&bp, attr);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.GetVolumeStatus
|
|
*/
|
|
static int afs_deliver_fs_get_volume_status(struct afs_call *call)
|
|
{
|
|
const __be32 *bp;
|
|
char *p;
|
|
int ret;
|
|
|
|
_enter("{%u}", call->unmarshall);
|
|
|
|
switch (call->unmarshall) {
|
|
case 0:
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the returned status record */
|
|
case 1:
|
|
_debug("extract status");
|
|
ret = afs_extract_data(call, call->buffer,
|
|
12 * 4, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
bp = call->buffer;
|
|
xdr_decode_AFSFetchVolumeStatus(&bp, call->reply[1]);
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the volume name length */
|
|
case 2:
|
|
ret = afs_extract_data(call, &call->tmp, 4, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
call->count = ntohl(call->tmp);
|
|
_debug("volname length: %u", call->count);
|
|
if (call->count >= AFSNAMEMAX)
|
|
return -EBADMSG;
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the volume name */
|
|
case 3:
|
|
_debug("extract volname");
|
|
if (call->count > 0) {
|
|
ret = afs_extract_data(call, call->reply[2],
|
|
call->count, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
p = call->reply[2];
|
|
p[call->count] = 0;
|
|
_debug("volname '%s'", p);
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the volume name padding */
|
|
if ((call->count & 3) == 0) {
|
|
call->unmarshall++;
|
|
goto no_volname_padding;
|
|
}
|
|
call->count = 4 - (call->count & 3);
|
|
|
|
case 4:
|
|
ret = afs_extract_data(call, call->buffer,
|
|
call->count, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
no_volname_padding:
|
|
|
|
/* extract the offline message length */
|
|
case 5:
|
|
ret = afs_extract_data(call, &call->tmp, 4, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
call->count = ntohl(call->tmp);
|
|
_debug("offline msg length: %u", call->count);
|
|
if (call->count >= AFSNAMEMAX)
|
|
return -EBADMSG;
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the offline message */
|
|
case 6:
|
|
_debug("extract offline");
|
|
if (call->count > 0) {
|
|
ret = afs_extract_data(call, call->reply[2],
|
|
call->count, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
p = call->reply[2];
|
|
p[call->count] = 0;
|
|
_debug("offline '%s'", p);
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the offline message padding */
|
|
if ((call->count & 3) == 0) {
|
|
call->unmarshall++;
|
|
goto no_offline_padding;
|
|
}
|
|
call->count = 4 - (call->count & 3);
|
|
|
|
case 7:
|
|
ret = afs_extract_data(call, call->buffer,
|
|
call->count, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
no_offline_padding:
|
|
|
|
/* extract the message of the day length */
|
|
case 8:
|
|
ret = afs_extract_data(call, &call->tmp, 4, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
call->count = ntohl(call->tmp);
|
|
_debug("motd length: %u", call->count);
|
|
if (call->count >= AFSNAMEMAX)
|
|
return -EBADMSG;
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the message of the day */
|
|
case 9:
|
|
_debug("extract motd");
|
|
if (call->count > 0) {
|
|
ret = afs_extract_data(call, call->reply[2],
|
|
call->count, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
p = call->reply[2];
|
|
p[call->count] = 0;
|
|
_debug("motd '%s'", p);
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* extract the message of the day padding */
|
|
call->count = (4 - (call->count & 3)) & 3;
|
|
|
|
case 10:
|
|
ret = afs_extract_data(call, call->buffer,
|
|
call->count, false);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
case 11:
|
|
break;
|
|
}
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* destroy an FS.GetVolumeStatus call
|
|
*/
|
|
static void afs_get_volume_status_call_destructor(struct afs_call *call)
|
|
{
|
|
kfree(call->reply[2]);
|
|
call->reply[2] = NULL;
|
|
afs_flat_call_destructor(call);
|
|
}
|
|
|
|
/*
|
|
* FS.GetVolumeStatus operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSGetVolumeStatus = {
|
|
.name = "FS.GetVolumeStatus",
|
|
.deliver = afs_deliver_fs_get_volume_status,
|
|
.destructor = afs_get_volume_status_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* fetch the status of a volume
|
|
*/
|
|
int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
|
|
struct afs_volume_status *vs)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
void *tmpbuf;
|
|
|
|
_enter("");
|
|
|
|
tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
|
|
if (!tmpbuf)
|
|
return -ENOMEM;
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
|
|
if (!call) {
|
|
kfree(tmpbuf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
call->reply[1] = vs;
|
|
call->reply[2] = tmpbuf;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
bp[0] = htonl(FSGETVOLUMESTATUS);
|
|
bp[1] = htonl(vnode->fid.vid);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
|
|
*/
|
|
static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
|
|
{
|
|
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, call->reply[X]); */
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.SetLock operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSSetLock = {
|
|
.name = "FS.SetLock",
|
|
.deliver = afs_deliver_fs_xxxx_lock,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* FS.ExtendLock operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSExtendLock = {
|
|
.name = "FS.ExtendLock",
|
|
.deliver = afs_deliver_fs_xxxx_lock,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* FS.ReleaseLock operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSReleaseLock = {
|
|
.name = "FS.ReleaseLock",
|
|
.deliver = afs_deliver_fs_xxxx_lock,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* Set a lock on a file
|
|
*/
|
|
int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSSETLOCK);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
*bp++ = htonl(type);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* extend a lock on a file
|
|
*/
|
|
int afs_fs_extend_lock(struct afs_fs_cursor *fc)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSEXTENDLOCK);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* release a lock on a file
|
|
*/
|
|
int afs_fs_release_lock(struct afs_fs_cursor *fc)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_call *call;
|
|
struct afs_net *net = afs_v2net(vnode);
|
|
__be32 *bp;
|
|
|
|
_enter("");
|
|
|
|
call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
|
|
if (!call)
|
|
return -ENOMEM;
|
|
|
|
call->key = fc->key;
|
|
call->reply[0] = vnode;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSRELEASELOCK);
|
|
*bp++ = htonl(vnode->fid.vid);
|
|
*bp++ = htonl(vnode->fid.vnode);
|
|
*bp++ = htonl(vnode->fid.unique);
|
|
|
|
afs_use_fs_server(call, fc->cbi);
|
|
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* 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",
|
|
.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);
|
|
|
|
/* Can't take a ref on server */
|
|
return afs_make_call(ac, call, GFP_NOFS, false);
|
|
}
|
|
|
|
/*
|
|
* 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/%u}", call->unmarshall, call->offset, call->count);
|
|
|
|
again:
|
|
switch (call->unmarshall) {
|
|
case 0:
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* Extract the capabilities word count */
|
|
case 1:
|
|
ret = afs_extract_data(call, &call->tmp,
|
|
1 * sizeof(__be32),
|
|
true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
count = ntohl(call->tmp);
|
|
|
|
call->count = count;
|
|
call->count2 = count;
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
|
|
/* Extract capabilities words */
|
|
case 2:
|
|
count = min(call->count, 16U);
|
|
ret = afs_extract_data(call, call->buffer,
|
|
count * sizeof(__be32),
|
|
call->count > 16);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* TODO: Examine capabilities */
|
|
|
|
call->count -= count;
|
|
if (call->count > 0)
|
|
goto again;
|
|
call->offset = 0;
|
|
call->unmarshall++;
|
|
break;
|
|
}
|
|
|
|
_leave(" = 0 [done]");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FS.GetCapabilities operation type
|
|
*/
|
|
static const struct afs_call_type afs_RXFSGetCapabilities = {
|
|
.name = "FS.GetCapabilities",
|
|
.deliver = afs_deliver_fs_get_capabilities,
|
|
.destructor = afs_flat_call_destructor,
|
|
};
|
|
|
|
/*
|
|
* Probe a fileserver for the capabilities that it supports. This can
|
|
* return up to 196 words.
|
|
*/
|
|
int 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 -ENOMEM;
|
|
|
|
call->key = key;
|
|
|
|
/* marshall the parameters */
|
|
bp = call->request;
|
|
*bp++ = htonl(FSGETCAPABILITIES);
|
|
|
|
/* Can't take a ref on server */
|
|
return afs_make_call(ac, call, GFP_NOFS, false);
|
|
}
|