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提交 0c3a5ac2 编写于 作者: D David Howells
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afs: Make it possible to get the data version in readpage 

Store the data version number indicated by an FS.FetchData op into the read
request structure so that it's accessible by the page reader.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
上级 5800db81
隐藏空白更改
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Showing with 59 addition and 44 deletion
fs/afs/flock.c
浏览文件 @ 0c3a5ac2
......@@ -613,7 +613,7 @@ static int afs_do_getlk(struct file *file, struct file_lock *fl)
posix_test_lock(file, fl);
if (fl->fl_type == F_UNLCK) {
/* no local locks; consult the server */
ret = afs_fetch_status(vnode, key);
ret = afs_fetch_status(vnode, key, false);
if (ret < 0)
goto error;
......
fs/afs/fsclient.c
浏览文件 @ 0c3a5ac2
......@@ -69,9 +69,9 @@ static void xdr_dump_bad(const __be32 *bp)
static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
struct afs_file_status *status,
struct afs_vnode *vnode,
afs_dataversion_t *store_version)
const afs_dataversion_t *expected_version,
afs_dataversion_t *_version)
{
afs_dataversion_t expected_version;
const __be32 *bp = *_bp;
umode_t mode;
u64 data_version, size;
......@@ -136,6 +136,8 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
changed |= true;
}
status->mode &= S_IALLUGO;
if (_version)
*_version = data_version;
_debug("vnode time %lx, %lx",
status->mtime_client, status->mtime_server);
......@@ -162,12 +164,8 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
inode_set_iversion_raw(&vnode->vfs_inode, data_version);
}
expected_version = status->data_version;
if (store_version)
expected_version = *store_version;
if (expected_version != data_version) {
status->data_version = data_version;
status->data_version = data_version;
if (expected_version && *expected_version != data_version) {
if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
_debug("vnode modified %llx on {%x:%u}",
(unsigned long long) data_version,
......@@ -175,8 +173,6 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
set_bit(AFS_VNODE_DIR_MODIFIED, &vnode->flags);
set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
}
} else if (store_version) {
status->data_version = data_version;
}
out:
......@@ -323,7 +319,8 @@ static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
/* 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, &vnode->status, vnode,
&call->expected_version, NULL);
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
xdr_decode_AFSVolSync(&bp, call->reply[1]);
......@@ -345,7 +342,8 @@ static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
/*
* fetch the status information for a file
*/
int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync)
int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
bool new_inode)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
......@@ -365,6 +363,7 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = volsync;
call->expected_version = new_inode ? 1 : vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -500,7 +499,9 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
return ret;
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
&vnode->status.data_version,
&req->new_version);
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
xdr_decode_AFSVolSync(&bp, call->reply[1]);
......@@ -570,6 +571,7 @@ static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
call->reply[0] = vnode;
call->reply[1] = NULL; /* volsync */
call->reply[2] = req;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -614,6 +616,7 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
call->reply[0] = vnode;
call->reply[1] = NULL; /* volsync */
call->reply[2] = req;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -649,8 +652,9 @@ static int afs_deliver_fs_create_vnode(struct afs_call *call)
/* 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_AFSFetchStatus(&bp, call->reply[2], NULL, NULL, NULL);
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
&call->expected_version, NULL);
xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
......@@ -708,6 +712,7 @@ int afs_fs_create(struct afs_fs_cursor *fc,
call->reply[1] = newfid;
call->reply[2] = newstatus;
call->reply[3] = newcb;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -751,7 +756,8 @@ static int afs_deliver_fs_remove(struct afs_call *call)
/* 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, &vnode->status, vnode,
&call->expected_version, NULL);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
......@@ -800,6 +806,7 @@ int afs_fs_remove(struct afs_fs_cursor *fc, const char *name, bool isdir)
call->key = fc->key;
call->reply[0] = vnode;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -837,8 +844,9 @@ static int afs_deliver_fs_link(struct afs_call *call)
/* 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_AFSFetchStatus(&bp, &vnode->status, vnode, NULL, NULL);
xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode,
&call->expected_version, NULL);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
......@@ -880,6 +888,7 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
call->key = fc->key;
call->reply[0] = dvnode;
call->reply[1] = vnode;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -921,8 +930,9 @@ static int afs_deliver_fs_symlink(struct afs_call *call)
/* 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_AFSFetchStatus(&bp, call->reply[2], NULL, NULL, NULL);
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
&call->expected_version, NULL);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
......@@ -973,6 +983,7 @@ int afs_fs_symlink(struct afs_fs_cursor *fc,
call->reply[0] = vnode;
call->reply[1] = newfid;
call->reply[2] = newstatus;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -1023,10 +1034,11 @@ static int afs_deliver_fs_rename(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode,
&call->expected_version, NULL);
if (new_dvnode != orig_dvnode)
xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
NULL);
&call->expected_version_2, NULL);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
......@@ -1077,6 +1089,8 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
call->key = fc->key;
call->reply[0] = orig_dvnode;
call->reply[1] = new_dvnode;
call->expected_version = orig_dvnode->status.data_version;
call->expected_version_2 = new_dvnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -1126,7 +1140,7 @@ static int afs_deliver_fs_store_data(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
&call->store_version);
&call->expected_version, NULL);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
afs_pages_written_back(vnode, call);
......@@ -1183,7 +1197,7 @@ static int afs_fs_store_data64(struct afs_fs_cursor *fc,
call->first_offset = offset;
call->last_to = to;
call->send_pages = true;
call->store_version = vnode->status.data_version + 1;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
......@@ -1258,7 +1272,7 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
call->first_offset = offset;
call->last_to = to;
call->send_pages = true;
call->store_version = vnode->status.data_version + 1;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
......@@ -1288,7 +1302,6 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
*/
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;
......@@ -1300,12 +1313,9 @@ static int afs_deliver_fs_store_status(struct afs_call *call)
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_AFSFetchStatus(&bp, &vnode->status, vnode,
&call->expected_version, NULL);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
......@@ -1360,7 +1370,7 @@ static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
call->key = fc->key;
call->reply[0] = vnode;
call->store_version = vnode->status.data_version + 1;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
......@@ -1409,7 +1419,7 @@ static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
call->key = fc->key;
call->reply[0] = vnode;
call->store_version = vnode->status.data_version + 1;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
......@@ -1454,6 +1464,7 @@ int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
call->key = fc->key;
call->reply[0] = vnode;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
......@@ -2004,7 +2015,8 @@ static int afs_deliver_fs_fetch_status(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFetchStatus(&bp, status, vnode, NULL);
xdr_decode_AFSFetchStatus(&bp, status, vnode,
&call->expected_version, NULL);
callback[call->count].version = ntohl(bp[0]);
callback[call->count].expiry = ntohl(bp[1]);
callback[call->count].type = ntohl(bp[2]);
......@@ -2056,6 +2068,7 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc,
call->reply[1] = status;
call->reply[2] = callback;
call->reply[3] = volsync;
call->expected_version = 1; /* vnode->status.data_version */
/* marshall the parameters */
bp = call->request;
......@@ -2116,7 +2129,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
statuses = call->reply[1];
xdr_decode_AFSFetchStatus(&bp, &statuses[call->count],
call->count == 0 ? vnode : NULL,
NULL);
NULL, NULL);
call->count++;
if (call->count < call->count2)
......
fs/afs/inode.c
浏览文件 @ 0c3a5ac2
......@@ -105,7 +105,7 @@ static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
/*
* Fetch file status from the volume.
*/
int afs_fetch_status(struct afs_vnode *vnode, struct key *key)
int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool new_inode)
{
struct afs_fs_cursor fc;
int ret;
......@@ -119,7 +119,7 @@ int afs_fetch_status(struct afs_vnode *vnode, struct key *key)
if (afs_begin_vnode_operation(&fc, vnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = vnode->cb_break + vnode->cb_s_break;
afs_fs_fetch_file_status(&fc, NULL);
afs_fs_fetch_file_status(&fc, NULL, new_inode);
}
afs_check_for_remote_deletion(&fc, fc.vnode);
......@@ -307,7 +307,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
if (!status) {
/* it's a remotely extant inode */
ret = afs_fetch_status(vnode, key);
ret = afs_fetch_status(vnode, key, true);
if (ret < 0)
goto bad_inode;
} else {
......@@ -432,7 +432,7 @@ int afs_validate(struct afs_vnode *vnode, struct key *key)
* access */
if (!test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
_debug("not promised");
ret = afs_fetch_status(vnode, key);
ret = afs_fetch_status(vnode, key, false);
if (ret < 0) {
if (ret == -ENOENT) {
set_bit(AFS_VNODE_DELETED, &vnode->flags);
......
fs/afs/internal.h
浏览文件 @ 0c3a5ac2
......@@ -122,7 +122,8 @@ struct afs_call {
u32 operation_ID; /* operation ID for an incoming call */
u32 count; /* count for use in unmarshalling */
__be32 tmp; /* place to extract temporary data */
afs_dataversion_t store_version; /* updated version expected from store */
afs_dataversion_t expected_version; /* Updated version expected from store */
afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */
};
struct afs_call_type {
......@@ -173,6 +174,7 @@ struct afs_read {
loff_t len; /* How much we're asking for */
loff_t actual_len; /* How much we're actually getting */
loff_t remain; /* Amount remaining */
afs_dataversion_t new_version; /* Version number returned by server */
atomic_t usage;
unsigned int index; /* Which page we're reading into */
unsigned int nr_pages;
......@@ -702,7 +704,7 @@ extern int afs_flock(struct file *, int, struct file_lock *);
/*
* fsclient.c
*/
extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *);
extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t,
......@@ -735,7 +737,7 @@ extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
/*
* inode.c
*/
extern int afs_fetch_status(struct afs_vnode *, struct key *);
extern int afs_fetch_status(struct afs_vnode *, struct key *, bool);
extern int afs_iget5_test(struct inode *, void *);
extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
extern struct inode *afs_iget(struct super_block *, struct key *,
......
fs/afs/security.c
浏览文件 @ 0c3a5ac2
......@@ -322,7 +322,7 @@ int afs_check_permit(struct afs_vnode *vnode, struct key *key,
*/
_debug("no valid permit");
ret = afs_fetch_status(vnode, key);
ret = afs_fetch_status(vnode, key, false);
if (ret < 0) {
*_access = 0;
_leave(" = %d", ret);
......
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