aboutsummaryrefslogtreecommitdiff
path: root/fs/afs/fsclient.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/afs/fsclient.c')
-rw-r--r--fs/afs/fsclient.c183
1 files changed, 172 insertions, 11 deletions
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 5dff1308b6f..c2e930ec288 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -10,6 +10,7 @@
*/
#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/circ_buf.h>
#include "internal.h"
@@ -41,6 +42,8 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
umode_t mode;
u64 data_version, size;
u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
+ kuid_t owner;
+ kgid_t group;
#define EXTRACT(DST) \
do { \
@@ -55,7 +58,9 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
size = ntohl(*bp++);
data_version = ntohl(*bp++);
EXTRACT(status->author);
- EXTRACT(status->owner);
+ owner = make_kuid(&init_user_ns, ntohl(*bp++));
+ changed |= !uid_eq(owner, status->owner);
+ status->owner = owner;
EXTRACT(status->caller_access); /* call ticket dependent */
EXTRACT(status->anon_access);
EXTRACT(status->mode);
@@ -64,10 +69,12 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
bp++; /* seg size */
status->mtime_client = ntohl(*bp++);
status->mtime_server = ntohl(*bp++);
- EXTRACT(status->group);
+ group = make_kgid(&init_user_ns, ntohl(*bp++));
+ changed |= !gid_eq(group, status->group);
+ status->group = group;
bp++; /* sync counter */
data_version |= (u64) ntohl(*bp++) << 32;
- bp++; /* lock count */
+ EXTRACT(status->lock_count);
size |= (u64) ntohl(*bp++) << 32;
bp++; /* spare 4 */
*_bp = bp;
@@ -88,8 +95,8 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
i_size_write(&vnode->vfs_inode, size);
vnode->vfs_inode.i_uid = status->owner;
vnode->vfs_inode.i_gid = status->group;
- vnode->vfs_inode.i_version = vnode->fid.unique;
- vnode->vfs_inode.i_nlink = status->nlink;
+ vnode->vfs_inode.i_generation = vnode->fid.unique;
+ set_nlink(&vnode->vfs_inode, status->nlink);
mode = vnode->vfs_inode.i_mode;
mode &= ~S_IALLUGO;
@@ -101,6 +108,7 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
+ vnode->vfs_inode.i_version = data_version;
}
expected_version = status->data_version;
@@ -179,12 +187,12 @@ static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
if (attr->ia_valid & ATTR_UID) {
mask |= AFS_SET_OWNER;
- owner = attr->ia_uid;
+ owner = from_kuid(&init_user_ns, attr->ia_uid);
}
if (attr->ia_valid & ATTR_GID) {
mask |= AFS_SET_GROUP;
- group = attr->ia_gid;
+ group = from_kgid(&init_user_ns, attr->ia_gid);
}
if (attr->ia_valid & ATTR_MODE) {
@@ -363,10 +371,10 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call,
_debug("extract data");
if (call->count > 0) {
page = call->reply3;
- buffer = kmap_atomic(page, KM_USER0);
+ buffer = kmap_atomic(page);
ret = afs_extract_data(call, skb, last, buffer,
call->count);
- kunmap_atomic(buffer, KM_USER0);
+ kunmap_atomic(buffer);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
@@ -409,9 +417,9 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call,
if (call->count < PAGE_SIZE) {
_debug("clear");
page = call->reply3;
- buffer = kmap_atomic(page, KM_USER0);
+ buffer = kmap_atomic(page);
memset(buffer + call->count, 0, PAGE_SIZE - call->count);
- kunmap_atomic(buffer, KM_USER0);
+ kunmap_atomic(buffer);
}
_leave(" = 0 [done]");
@@ -1748,3 +1756,156 @@ int afs_fs_get_volume_status(struct afs_server *server,
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
}
+
+/*
+ * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
+ */
+static int afs_deliver_fs_xxxx_lock(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _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,
+ .abort_to_error = afs_abort_to_error,
+ .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,
+ .abort_to_error = afs_abort_to_error,
+ .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,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * get a lock on a file
+ */
+int afs_fs_set_lock(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ afs_lock_type_t type,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ __be32 *bp;
+
+ _enter("");
+
+ call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSSETLOCK);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+ *bp++ = htonl(type);
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * extend a lock on a file
+ */
+int afs_fs_extend_lock(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ __be32 *bp;
+
+ _enter("");
+
+ call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSEXTENDLOCK);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * release a lock on a file
+ */
+int afs_fs_release_lock(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ __be32 *bp;
+
+ _enter("");
+
+ call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSRELEASELOCK);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-11 03:39:49 +0000