hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

cifs: OFD locks do not conflict with eachothers 

RHBZ 1484130

Update cifs_find_fid_lock_conflict() to recognize that
ODF locks do not conflict with eachother.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2018-10-04 09:24:38 +10:00 committed by Steve French
parent ff526d8605
commit 9645759ce6
3 changed files with 25 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/cifs/cifsglob.h
View File

@ -1074,7 +1074,8 @@ struct cifsLockInfo {
__u64 offset;
__u64 length;
__u32 pid;
__u32 type;
__u16 type;
__u16 flags;
};
/*

2
fs/cifs/cifsproto.h
View File

@ -219,7 +219,7 @@ extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon);
extern void cifs_reopen_persistent_handles(struct cifs_tcon *tcon);
extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u8 type,
__u64 length, __u8 type, __u16 flags,
struct cifsLockInfo **conf_lock,
int rw_check);
extern void cifs_add_pending_open(struct cifs_fid *fid,

35
fs/cifs/file.c
View File

@ -864,7 +864,7 @@ int cifs_closedir(struct inode *inode, struct file *file)
}
static struct cifsLockInfo *
cifs_lock_init(__u64 offset, __u64 length, __u8 type)
cifs_lock_init(__u64 offset, __u64 length, __u8 type, __u16 flags)
{
struct cifsLockInfo *lock =
kmalloc(sizeof(struct cifsLockInfo), GFP_KERNEL);
@ -874,6 +874,7 @@ cifs_lock_init(__u64 offset, __u64 length, __u8 type)
lock->length = length;
lock->type = type;
lock->pid = current->tgid;
lock->flags = flags;
INIT_LIST_HEAD(&lock->blist);
init_waitqueue_head(&lock->block_q);
return lock;
@ -896,7 +897,8 @@ cifs_del_lock_waiters(struct cifsLockInfo *lock)
/* @rw_check : 0 - no op, 1 - read, 2 - write */
static bool
cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
__u64 length, __u8 type, struct cifsFileInfo *cfile,
__u64 length, __u8 type, __u16 flags,
struct cifsFileInfo *cfile,
struct cifsLockInfo **conf_lock, int rw_check)
{
struct cifsLockInfo *li;
@ -918,6 +920,10 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
((server->ops->compare_fids(cfile, cur_cfile) &&
current->tgid == li->pid) || type == li->type))
continue;
if (rw_check == CIFS_LOCK_OP &&
(flags & FL_OFDLCK) && (li->flags & FL_OFDLCK) &&
server->ops->compare_fids(cfile, cur_cfile))
continue;
if (conf_lock)
*conf_lock = li;
return true;
@ -927,8 +933,8 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
bool
cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
__u8 type, struct cifsLockInfo **conf_lock,
int rw_check)
__u8 type, __u16 flags,
struct cifsLockInfo **conf_lock, int rw_check)
{
bool rc = false;
struct cifs_fid_locks *cur;
@ -936,7 +942,8 @@ cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
list_for_each_entry(cur, &cinode->llist, llist) {
rc = cifs_find_fid_lock_conflict(cur, offset, length, type,
cfile, conf_lock, rw_check);
flags, cfile, conf_lock,
rw_check);
if (rc)
break;
}
@ -964,7 +971,8 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
down_read(&cinode->lock_sem);
exist = cifs_find_lock_conflict(cfile, offset, length, type,
&conf_lock, CIFS_LOCK_OP);
flock->fl_flags, &conf_lock,
CIFS_LOCK_OP);
if (exist) {
flock->fl_start = conf_lock->offset;
flock->fl_end = conf_lock->offset + conf_lock->length - 1;
@ -1011,7 +1019,8 @@ try_again:
down_write(&cinode->lock_sem);
exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length,
lock->type, &conf_lock, CIFS_LOCK_OP);
lock->type, lock->flags, &conf_lock,
CIFS_LOCK_OP);
if (!exist && cinode->can_cache_brlcks) {
list_add_tail(&lock->llist, &cfile->llist->locks);
up_write(&cinode->lock_sem);
@ -1321,7 +1330,7 @@ cifs_read_flock(struct file_lock *flock, __u32 *type, int *lock, int *unlock,
cifs_dbg(FYI, "Lease on file - not implemented yet\n");
if (flock->fl_flags &
(~(FL_POSIX | FL_FLOCK | FL_SLEEP |
FL_ACCESS | FL_LEASE | FL_CLOSE)))
FL_ACCESS | FL_LEASE | FL_CLOSE | FL_OFDLCK)))
cifs_dbg(FYI, "Unknown lock flags 0x%x\n", flock->fl_flags);
*type = server->vals->large_lock_type;
@ -1584,7 +1593,8 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
if (lock) {
struct cifsLockInfo *lock;
lock = cifs_lock_init(flock->fl_start, length, type);
lock = cifs_lock_init(flock->fl_start, length, type,
flock->fl_flags);
if (!lock)
return -ENOMEM;
@ -1653,7 +1663,6 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock)
cifs_read_flock(flock, &type, &lock, &unlock, &wait_flag,
tcon->ses->server);
cifs_sb = CIFS_FILE_SB(file);
netfid = cfile->fid.netfid;
cinode = CIFS_I(file_inode(file));
@ -2817,8 +2826,8 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from)
goto out;
if (!cifs_find_lock_conflict(cfile, iocb->ki_pos, iov_iter_count(from),
server->vals->exclusive_lock_type, NULL,
CIFS_WRITE_OP))
server->vals->exclusive_lock_type, 0,
NULL, CIFS_WRITE_OP))
rc = __generic_file_write_iter(iocb, from);
else
rc = -EACCES;
@ -3388,7 +3397,7 @@ cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to)
down_read(&cinode->lock_sem);
if (!cifs_find_lock_conflict(cfile, iocb->ki_pos, iov_iter_count(to),
tcon->ses->server->vals->shared_lock_type,
NULL, CIFS_READ_OP))
0, NULL, CIFS_READ_OP))
rc = generic_file_read_iter(iocb, to);
up_read(&cinode->lock_sem);
return rc;