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authorMarc Eshel <eshel@almaden.ibm.com>2007-02-21 00:55:18 -0500
committerJ. Bruce Fields <bfields@citi.umich.edu>2007-05-06 17:39:00 -0400
commit9d6a8c5c213e34c475e72b245a8eb709258e968c (patch)
tree96110535c2bd9485129c0753a9e0f012083b220f /fs/locks.c
parent70cc6487a4e08b8698c0e2ec935fb48d10490162 (diff)
downloadlwn-9d6a8c5c213e34c475e72b245a8eb709258e968c.tar.gz
lwn-9d6a8c5c213e34c475e72b245a8eb709258e968c.zip
locks: give posix_test_lock same interface as ->lock
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>
Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c37
1 files changed, 16 insertions, 21 deletions
diff --git a/fs/locks.c b/fs/locks.c
index b07e6e6f819b..749a0dc7cd4b 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -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 @@ out:
*/
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;