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-rw-r--r--fs/ceph/locks.c61
-rw-r--r--fs/ceph/super.c1
-rw-r--r--fs/ceph/super.h1
3 files changed, 43 insertions, 20 deletions
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index f91a569a20fb..d94ba0df9f4d 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -2,11 +2,31 @@
#include <linux/file.h>
#include <linux/namei.h>
+#include <linux/random.h>
#include "super.h"
#include "mds_client.h"
#include <linux/ceph/pagelist.h>
+static u64 lock_secret;
+
+static inline u64 secure_addr(void *addr)
+{
+ u64 v = lock_secret ^ (u64)(unsigned long)addr;
+ /*
+ * Set the most significant bit, so that MDS knows the 'owner'
+ * is sufficient to identify the owner of lock. (old code uses
+ * both 'owner' and 'pid')
+ */
+ v |= (1ULL << 63);
+ return v;
+}
+
+void __init ceph_flock_init(void)
+{
+ get_random_bytes(&lock_secret, sizeof(lock_secret));
+}
+
/**
* Implement fcntl and flock locking functions.
*/
@@ -14,11 +34,11 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file,
int cmd, u8 wait, struct file_lock *fl)
{
struct inode *inode = file_inode(file);
- struct ceph_mds_client *mdsc =
- ceph_sb_to_client(inode->i_sb)->mdsc;
+ struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
struct ceph_mds_request *req;
int err;
u64 length = 0;
+ u64 owner;
req = ceph_mdsc_create_request(mdsc, operation, USE_AUTH_MDS);
if (IS_ERR(req))
@@ -32,25 +52,27 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file,
else
length = fl->fl_end - fl->fl_start + 1;
- dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, "
- "length: %llu, wait: %d, type: %d", (int)lock_type,
- (int)operation, (u64)fl->fl_pid, fl->fl_start,
- length, wait, fl->fl_type);
+ if (lock_type == CEPH_LOCK_FCNTL)
+ owner = secure_addr(fl->fl_owner);
+ else
+ owner = secure_addr(fl->fl_file);
+
+ dout("ceph_lock_message: rule: %d, op: %d, owner: %llx, pid: %llu, "
+ "start: %llu, length: %llu, wait: %d, type: %d", (int)lock_type,
+ (int)operation, owner, (u64)fl->fl_pid, fl->fl_start, length,
+ wait, fl->fl_type);
req->r_args.filelock_change.rule = lock_type;
req->r_args.filelock_change.type = cmd;
+ req->r_args.filelock_change.owner = cpu_to_le64(owner);
req->r_args.filelock_change.pid = cpu_to_le64((u64)fl->fl_pid);
- /* This should be adjusted, but I'm not sure if
- namespaces actually get id numbers*/
- req->r_args.filelock_change.pid_namespace =
- cpu_to_le64((u64)(unsigned long)fl->fl_nspid);
req->r_args.filelock_change.start = cpu_to_le64(fl->fl_start);
req->r_args.filelock_change.length = cpu_to_le64(length);
req->r_args.filelock_change.wait = wait;
err = ceph_mdsc_do_request(mdsc, inode, req);
- if ( operation == CEPH_MDS_OP_GETFILELOCK){
+ if (operation == CEPH_MDS_OP_GETFILELOCK) {
fl->fl_pid = le64_to_cpu(req->r_reply_info.filelock_reply->pid);
if (CEPH_LOCK_SHARED == req->r_reply_info.filelock_reply->type)
fl->fl_type = F_RDLCK;
@@ -93,8 +115,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
if (__mandatory_lock(file->f_mapping->host) && fl->fl_type != F_UNLCK)
return -ENOLCK;
- fl->fl_nspid = get_pid(task_tgid(current));
- dout("ceph_lock, fl_pid:%d", fl->fl_pid);
+ dout("ceph_lock, fl_owner: %p", fl->fl_owner);
/* set wait bit as appropriate, then make command as Ceph expects it*/
if (IS_GETLK(cmd))
@@ -111,7 +132,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
err = ceph_lock_message(CEPH_LOCK_FCNTL, op, file, lock_cmd, wait, fl);
if (!err) {
- if ( op != CEPH_MDS_OP_GETFILELOCK ){
+ if (op != CEPH_MDS_OP_GETFILELOCK) {
dout("mds locked, locking locally");
err = posix_lock_file(file, fl, NULL);
if (err && (CEPH_MDS_OP_SETFILELOCK == op)) {
@@ -145,8 +166,7 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
if (__mandatory_lock(file->f_mapping->host) && fl->fl_type != F_UNLCK)
return -ENOLCK;
- fl->fl_nspid = get_pid(task_tgid(current));
- dout("ceph_flock, fl_pid:%d", fl->fl_pid);
+ dout("ceph_flock, fl_file: %p", fl->fl_file);
if (IS_SETLKW(cmd))
wait = 1;
@@ -289,13 +309,14 @@ int lock_to_ceph_filelock(struct file_lock *lock,
struct ceph_filelock *cephlock)
{
int err = 0;
-
cephlock->start = cpu_to_le64(lock->fl_start);
cephlock->length = cpu_to_le64(lock->fl_end - lock->fl_start + 1);
cephlock->client = cpu_to_le64(0);
- cephlock->pid = cpu_to_le64(lock->fl_pid);
- cephlock->pid_namespace =
- cpu_to_le64((u64)(unsigned long)lock->fl_nspid);
+ cephlock->pid = cpu_to_le64((u64)lock->fl_pid);
+ if (lock->fl_flags & FL_POSIX)
+ cephlock->owner = cpu_to_le64(secure_addr(lock->fl_owner));
+ else
+ cephlock->owner = cpu_to_le64(secure_addr(lock->fl_file));
switch (lock->fl_type) {
case F_RDLCK:
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 10a4ccbf38da..06150fd745ac 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -1026,6 +1026,7 @@ static int __init init_ceph(void)
if (ret)
goto out;
+ ceph_flock_init();
ceph_xattr_init();
ret = register_filesystem(&ceph_fs_type);
if (ret)
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 70bb183385b7..7866cd05a6bb 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -871,6 +871,7 @@ extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
extern const struct export_operations ceph_export_ops;
/* locks.c */
+extern __init void ceph_flock_init(void);
extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-27 20:12:58 +0000