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Diffstat (limited to 'fs/afs/fsclient.c')
-rw-r--r--fs/afs/fsclient.c100
1 files changed, 56 insertions, 44 deletions
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 5907601aafd0..50929cb91732 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -138,10 +138,6 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
u64 data_version, size;
u32 type, abort_code;
u8 flags = 0;
- int ret;
-
- if (vnode)
- write_seqlock(&vnode->cb_lock);
abort_code = ntohl(xdr->abort_code);
@@ -154,8 +150,7 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
* case.
*/
status->abort_code = abort_code;
- ret = 0;
- goto out;
+ return 0;
}
pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
@@ -164,8 +159,7 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
if (abort_code != 0 && inline_error) {
status->abort_code = abort_code;
- ret = 0;
- goto out;
+ return 0;
}
type = ntohl(xdr->type);
@@ -235,17 +229,35 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
flags);
}
- ret = 0;
-
-out:
- if (vnode)
- write_sequnlock(&vnode->cb_lock);
- return ret;
+ return 0;
bad:
xdr_dump_bad(*_bp);
- ret = afs_protocol_error(call, -EBADMSG);
- goto out;
+ return afs_protocol_error(call, -EBADMSG);
+}
+
+/*
+ * Decode the file status. We need to lock the target vnode if we're going to
+ * update its status so that stat() sees the attributes update atomically.
+ */
+static int afs_decode_status(struct afs_call *call,
+ const __be32 **_bp,
+ struct afs_file_status *status,
+ struct afs_vnode *vnode,
+ const afs_dataversion_t *expected_version,
+ struct afs_read *read_req)
+{
+ int ret;
+
+ if (!vnode)
+ return xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
+ expected_version, read_req);
+
+ write_seqlock(&vnode->cb_lock);
+ ret = xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
+ expected_version, read_req);
+ write_sequnlock(&vnode->cb_lock);
+ return ret;
}
/*
@@ -387,8 +399,8 @@ 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;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
@@ -568,8 +580,8 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
return ret;
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &vnode->status.data_version, req) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &vnode->status.data_version, req) < 0)
return afs_protocol_error(call, -EBADMSG);
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
@@ -721,9 +733,9 @@ 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]);
- if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) < 0 ||
- xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL) < 0 ||
+ afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -827,8 +839,8 @@ static int afs_deliver_fs_remove(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -917,9 +929,9 @@ static int afs_deliver_fs_link(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode, NULL, NULL) < 0 ||
- xdr_decode_AFSFetchStatus(call, &bp, &dvnode->status, dvnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL) < 0 ||
+ afs_decode_status(call, &bp, &dvnode->status, dvnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1004,9 +1016,9 @@ 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]);
- if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) ||
- xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL) ||
+ afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1110,12 +1122,12 @@ static int afs_deliver_fs_rename(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &orig_dvnode->status, orig_dvnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &orig_dvnode->status, orig_dvnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
if (new_dvnode != orig_dvnode &&
- xdr_decode_AFSFetchStatus(call, &bp, &new_dvnode->status, new_dvnode,
- &call->expected_version_2, NULL) < 0)
+ afs_decode_status(call, &bp, &new_dvnode->status, new_dvnode,
+ &call->expected_version_2, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1219,8 +1231,8 @@ static int afs_deliver_fs_store_data(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1395,8 +1407,8 @@ static int afs_deliver_fs_store_status(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -2097,8 +2109,8 @@ 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(call, &bp, status, vnode,
- &call->expected_version, NULL);
+ afs_decode_status(call, &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]);
@@ -2209,9 +2221,9 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
bp = call->buffer;
statuses = call->reply[1];
- if (xdr_decode_AFSFetchStatus(call, &bp, &statuses[call->count],
- call->count == 0 ? vnode : NULL,
- NULL, NULL) < 0)
+ if (afs_decode_status(call, &bp, &statuses[call->count],
+ call->count == 0 ? vnode : NULL,
+ NULL, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
call->count++;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 04:39:58 +0100