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locks: give posix_test_lock same interface as ->lock

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posix_test_lock() and ->lock() do the same job but have gratuitously
different interfaces.  Modify posix_test_lock() so the two agree,
simplifying some code in the process.

Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
This commit is contained in:
Marc Eshel 2007-02-21 00:55:18 -05:00 committed by J. Bruce Fields
parent 70cc6487a4
commit 9d6a8c5c21
8 changed files with 32 additions and 51 deletions
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3
fs/fuse/file.c
View file

@ -738,8 +738,7 @@ static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl)
if (cmd == F_GETLK) {
if (fc->no_lock) {
if (!posix_test_lock(file, fl, fl))
fl->fl_type = F_UNLCK;
posix_test_lock(file, fl);
err = 0;
} else
err = fuse_getlk(file, fl);

8
fs/gfs2/locking/nolock/main.c
View file

@ -164,13 +164,7 @@ static void nolock_unhold_lvb(void *lock, char *lvb)
static int nolock_plock_get(void *lockspace, struct lm_lockname *name,
struct file *file, struct file_lock *fl)
{
struct file_lock tmp;
int ret;
ret = posix_test_lock(file, fl, &tmp);
fl->fl_type = F_UNLCK;
if (ret)
memcpy(fl, &tmp, sizeof(struct file_lock));
posix_test_lock(file, fl);
return 0;
}

7
fs/gfs2/ops_file.c
View file

@ -513,12 +513,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
if (sdp->sd_args.ar_localflocks) {
if (IS_GETLK(cmd)) {
struct file_lock tmp;
int ret;
ret = posix_test_lock(file, fl, &tmp);
fl->fl_type = F_UNLCK;
if (ret)
memcpy(fl, &tmp, sizeof(struct file_lock));
posix_test_lock(file, fl);
return 0;
} else {
return posix_lock_file_wait(file, fl);

13
fs/lockd/svclock.c
View file

@ -426,15 +426,18 @@ nlmsvc_testlock(struct nlm_file *file, struct nlm_lock *lock,
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end);
if (posix_test_lock(file->f_file, &lock->fl, &conflock->fl)) {
if (posix_test_lock(file->f_file, &lock->fl)) {
dprintk("lockd: conflicting lock(ty=%d, %Ld-%Ld)\n",
conflock->fl.fl_type,
(long long)conflock->fl.fl_start,
(long long)conflock->fl.fl_end);
lock->fl.fl_type,
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end);
conflock->caller = "somehost"; /* FIXME */
conflock->len = strlen(conflock->caller);
conflock->oh.len = 0; /* don't return OH info */
conflock->svid = conflock->fl.fl_pid;
conflock->svid = lock->fl.fl_pid;
conflock->fl.fl_type = lock->fl.fl_type;
conflock->fl.fl_start = lock->fl.fl_start;
conflock->fl.fl_end = lock->fl.fl_end;
return nlm_lck_denied;
}

37
fs/locks.c
View file

@ -666,11 +666,11 @@ static int locks_block_on_timeout(struct file_lock *blocker, struct file_lock *w
}
int
posix_test_lock(struct file *filp, struct file_lock *fl,
struct file_lock *conflock)
posix_test_lock(struct file *filp, struct file_lock *fl)
{
struct file_lock *cfl;
fl->fl_type = F_UNLCK;
lock_kernel();
for (cfl = filp->f_path.dentry->d_inode->i_flock; cfl; cfl = cfl->fl_next) {
if (!IS_POSIX(cfl))
@ -679,7 +679,7 @@ posix_test_lock(struct file *filp, struct file_lock *fl,
break;
}
if (cfl) {
__locks_copy_lock(conflock, cfl);
__locks_copy_lock(fl, cfl);
unlock_kernel();
return 1;
}
@ -1648,7 +1648,7 @@ static void posix_lock_to_flock64(struct flock64 *flock, struct file_lock *fl)
*/
int fcntl_getlk(struct file *filp, struct flock __user *l)
{
struct file_lock *fl, cfl, file_lock;
struct file_lock file_lock;
struct flock flock;
int error;
@ -1667,15 +1667,12 @@ int fcntl_getlk(struct file *filp, struct flock __user *l)
error = filp->f_op->lock(filp, F_GETLK, &file_lock);
if (error < 0)
goto out;
else
fl = (file_lock.fl_type == F_UNLCK ? NULL : &file_lock);
} else {
fl = (posix_test_lock(filp, &file_lock, &cfl) ? &cfl : NULL);
}
} else
posix_test_lock(filp, &file_lock);
flock.l_type = F_UNLCK;
if (fl != NULL) {
error = posix_lock_to_flock(&flock, fl);
flock.l_type = file_lock.fl_type;
if (file_lock.fl_type != F_UNLCK) {
error = posix_lock_to_flock(&flock, &file_lock);
if (error)
goto out;
}
@ -1785,7 +1782,7 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
*/
int fcntl_getlk64(struct file *filp, struct flock64 __user *l)
{
struct file_lock *fl, cfl, file_lock;
struct file_lock file_lock;
struct flock64 flock;
int error;
@ -1804,15 +1801,13 @@ int fcntl_getlk64(struct file *filp, struct flock64 __user *l)
error = filp->f_op->lock(filp, F_GETLK, &file_lock);
if (error < 0)
goto out;
else
fl = (file_lock.fl_type == F_UNLCK ? NULL : &file_lock);
} else {
fl = (posix_test_lock(filp, &file_lock, &cfl) ? &cfl : NULL);
}
} else
posix_test_lock(filp, &file_lock);
flock.l_type = F_UNLCK;
if (fl != NULL)
posix_lock_to_flock64(&flock, fl);
flock.l_type = file_lock.fl_type;
if (file_lock.fl_type != F_UNLCK)
posix_lock_to_flock64(&flock, &file_lock);
error = -EFAULT;
if (!copy_to_user(l, &flock, sizeof(flock)))
error = 0;

7
fs/nfs/file.c
View file

@ -391,17 +391,12 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
{
struct file_lock cfl;
struct inode *inode = filp->f_mapping->host;
int status = 0;
lock_kernel();
/* Try local locking first */
if (posix_test_lock(filp, fl, &cfl)) {
fl->fl_start = cfl.fl_start;
fl->fl_end = cfl.fl_end;
fl->fl_type = cfl.fl_type;
fl->fl_pid = cfl.fl_pid;
if (posix_test_lock(filp, fl)) {
goto out;
}

6
fs/nfsd/nfs4state.c
View file

@ -2813,7 +2813,6 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct inode *inode;
struct file file;
struct file_lock file_lock;
struct file_lock conflock;
__be32 status;
if (nfs4_in_grace())
@ -2878,9 +2877,10 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
file.f_path.dentry = cstate->current_fh.fh_dentry;
status = nfs_ok;
if (posix_test_lock(&file, &file_lock, &conflock)) {
posix_test_lock(&file, &file_lock);
if (file_lock.fl_type != F_UNLCK) {
status = nfserr_denied;
nfs4_set_lock_denied(&conflock, &lockt->lt_denied);
nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
}
out:
nfs4_unlock_state();

2
include/linux/fs.h
View file

@ -851,7 +851,7 @@ extern void locks_init_lock(struct file_lock *);
extern void locks_copy_lock(struct file_lock *, struct file_lock *);
extern void locks_remove_posix(struct file *, fl_owner_t);
extern void locks_remove_flock(struct file *);
extern int posix_test_lock(struct file *, struct file_lock *, struct file_lock *);
extern int posix_test_lock(struct file *, struct file_lock *);
extern int posix_lock_file_conf(struct file *, struct file_lock *, struct file_lock *);
extern int posix_lock_file(struct file *, struct file_lock *);
extern int posix_lock_file_wait(struct file *, struct file_lock *);