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locks: pass the cmd value to fcntl_getlk/getlk64

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Once we introduce file private locks, we'll need to know what cmd value
was used, as that affects the ownership and whether a conflict would
arise.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Change-Id: Iaeb8233ae25bde5ef0049118ff94e4a9e0f02214
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
This commit is contained in:
Jeff Layton
2021-02-07 08:50:38 +01:00
committed by Francescodario Cuzzocrea
parent 4ca30f15a3
commit ee35812c91
3 changed files with 10 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/fcntl.c
+2 -2
View File
@@ -382,7 +382,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
err = setfl(fd, filp, arg);
break;
case F_GETLK:
err = fcntl_getlk(filp, (struct flock __user *) arg);
err = fcntl_getlk(filp, cmd, (struct flock __user *) arg);
break;
case F_SETLK:
case F_SETLKW:
@@ -512,7 +512,7 @@ SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
switch (cmd) {
case F_GETLK64:
err = fcntl_getlk64(filp, (struct flock64 __user *) arg);
err = fcntl_getlk64(filp, cmd, (struct flock64 __user *) arg);
break;
case F_SETLK64:
case F_SETLKW64:
fs/locks.c
+2 -2
View File
@@ -1732,7 +1732,7 @@ static void posix_lock_to_flock64(struct flock64 *flock, struct file_lock *fl)
/* Report the first existing lock that would conflict with l.
* This implements the F_GETLK command of fcntl().
*/
int fcntl_getlk(struct file *filp, struct flock __user *l)
int fcntl_getlk(struct file *filp, unsigned int cmd, struct flock __user *l)
{
struct file_lock file_lock;
struct flock flock;
@@ -1917,7 +1917,7 @@ out:
/* Report the first existing lock that would conflict with l.
* This implements the F_GETLK command of fcntl().
*/
int fcntl_getlk64(struct file *filp, struct flock64 __user *l)
int fcntl_getlk64(struct file *filp, unsigned int cmd, struct flock64 __user *l)
{
struct file_lock file_lock;
struct flock64 flock;
include/linux/fs.h
+6 -4
View File
@@ -1247,12 +1247,12 @@ struct file_lock {
extern void send_sigio(struct fown_struct *fown, int fd, int band);
#ifdef CONFIG_FILE_LOCKING
extern int fcntl_getlk(struct file *, struct flock __user *);
extern int fcntl_getlk(struct file *, unsigned int, struct flock __user *);
extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
struct flock __user *);
#if BITS_PER_LONG == 32
extern int fcntl_getlk64(struct file *, struct flock64 __user *);
extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 __user *);
extern int fcntl_setlk64(unsigned int, struct file *, unsigned int,
struct flock64 __user *);
#endif
@@ -1288,7 +1288,8 @@ extern void locks_delete_block(struct file_lock *waiter);
extern void lock_flocks(void);
extern void unlock_flocks(void);
#else /* !CONFIG_FILE_LOCKING */
static inline int fcntl_getlk(struct file *file, struct flock __user *user)
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
struct flock __user *user)
{
return -EINVAL;
}
@@ -1300,7 +1301,8 @@ static inline int fcntl_setlk(unsigned int fd, struct file *file,
}
#if BITS_PER_LONG == 32
static inline int fcntl_getlk64(struct file *file, struct flock64 __user *user)
static inline int fcntl_getlk64(struct file *file, unsigned int cmd,
struct flock64 __user *user)
{
return -EINVAL;
}