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-rw-r--r--fs/compat.c35
-rw-r--r--fs/fcntl.c35
-rw-r--r--fs/locks.c54
3 files changed, 104 insertions, 20 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 6af20de2c1a3..f340dcf11f68 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -399,12 +399,28 @@ static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *u
}
#endif
+static unsigned int
+convert_fcntl_cmd(unsigned int cmd)
+{
+ switch (cmd) {
+ case F_GETLK64:
+ return F_GETLK;
+ case F_SETLK64:
+ return F_SETLK;
+ case F_SETLKW64:
+ return F_SETLKW;
+ }
+
+ return cmd;
+}
+
asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
unsigned long arg)
{
mm_segment_t old_fs;
struct flock f;
long ret;
+ unsigned int conv_cmd;
switch (cmd) {
case F_GETLK:
@@ -441,16 +457,18 @@ asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
case F_GETLK64:
case F_SETLK64:
case F_SETLKW64:
+ case F_GETLKP:
+ case F_SETLKP:
+ case F_SETLKPW:
ret = get_compat_flock64(&f, compat_ptr(arg));
if (ret != 0)
break;
old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
- ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
- (unsigned long)&f);
+ conv_cmd = convert_fcntl_cmd(cmd);
+ ret = sys_fcntl(fd, conv_cmd, (unsigned long)&f);
set_fs(old_fs);
- if (cmd == F_GETLK64 && ret == 0) {
+ if ((conv_cmd == F_GETLK || conv_cmd == F_GETLKP) && ret == 0) {
/* need to return lock information - see above for commentary */
if (f.l_start > COMPAT_LOFF_T_MAX)
ret = -EOVERFLOW;
@@ -471,8 +489,15 @@ asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
unsigned long arg)
{
- if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
+ switch (cmd) {
+ case F_GETLK64:
+ case F_SETLK64:
+ case F_SETLKW64:
+ case F_GETLKP:
+ case F_SETLKP:
+ case F_SETLKPW:
return -EINVAL;
+ }
return compat_sys_fcntl64(fd, cmd, arg);
}
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 7ef7f2d2b608..9ead1596399a 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -272,9 +272,19 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
case F_SETFL:
err = setfl(fd, filp, arg);
break;
+#if BITS_PER_LONG != 32
+ /* 32-bit arches must use fcntl64() */
+ case F_GETLKP:
+#endif
case F_GETLK:
err = fcntl_getlk(filp, cmd, (struct flock __user *) arg);
break;
+#if BITS_PER_LONG != 32
+ /* 32-bit arches must use fcntl64() */
+ case F_SETLKP:
+ case F_SETLKPW:
+#endif
+ /* Fallthrough */
case F_SETLK:
case F_SETLKW:
err = fcntl_setlk(fd, filp, cmd, (struct flock __user *) arg);
@@ -388,17 +398,20 @@ SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
goto out1;
switch (cmd) {
- case F_GETLK64:
- err = fcntl_getlk64(f.file, cmd, (struct flock64 __user *) arg);
- break;
- case F_SETLK64:
- case F_SETLKW64:
- err = fcntl_setlk64(fd, f.file, cmd,
- (struct flock64 __user *) arg);
- break;
- default:
- err = do_fcntl(fd, cmd, arg, f.file);
- break;
+ case F_GETLK64:
+ case F_GETLKP:
+ err = fcntl_getlk64(f.file, cmd, (struct flock64 __user *) arg);
+ break;
+ case F_SETLK64:
+ case F_SETLKW64:
+ case F_SETLKP:
+ case F_SETLKPW:
+ err = fcntl_setlk64(fd, f.file, cmd,
+ (struct flock64 __user *) arg);
+ break;
+ default:
+ err = do_fcntl(fd, cmd, arg, f.file);
+ break;
}
out1:
fdput(f);
diff --git a/fs/locks.c b/fs/locks.c
index ed9fb769b88e..3b54b98236ee 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1930,6 +1930,12 @@ int fcntl_getlk(struct file *filp, unsigned int cmd, struct flock __user *l)
if (error)
goto out;
+ if (cmd == F_GETLKP) {
+ cmd = F_GETLK;
+ file_lock.fl_flags |= FL_FILE_PVT;
+ file_lock.fl_owner = (fl_owner_t)filp;
+ }
+
error = vfs_test_lock(filp, &file_lock);
if (error)
goto out;
@@ -2049,10 +2055,26 @@ again:
error = flock_to_posix_lock(filp, file_lock, &flock);
if (error)
goto out;
- if (cmd == F_SETLKW) {
+
+ /*
+ * If the cmd is requesting file-private locks, then set the
+ * FL_FILE_PVT flag and override the owner.
+ */
+ switch (cmd) {
+ case F_SETLKP:
+ cmd = F_SETLK;
+ file_lock->fl_flags |= FL_FILE_PVT;
+ file_lock->fl_owner = (fl_owner_t)filp;
+ break;
+ case F_SETLKPW:
+ cmd = F_SETLKW;
+ file_lock->fl_flags |= FL_FILE_PVT;
+ file_lock->fl_owner = (fl_owner_t)filp;
+ /* Fallthrough */
+ case F_SETLKW:
file_lock->fl_flags |= FL_SLEEP;
}
-
+
error = do_lock_file_wait(filp, cmd, file_lock);
/*
@@ -2098,6 +2120,12 @@ int fcntl_getlk64(struct file *filp, unsigned int cmd, struct flock64 __user *l)
if (error)
goto out;
+ if (cmd == F_GETLKP) {
+ cmd = F_GETLK64;
+ file_lock.fl_flags |= FL_FILE_PVT;
+ file_lock.fl_owner = (fl_owner_t)filp;
+ }
+
error = vfs_test_lock(filp, &file_lock);
if (error)
goto out;
@@ -2150,10 +2178,26 @@ again:
error = flock64_to_posix_lock(filp, file_lock, &flock);
if (error)
goto out;
- if (cmd == F_SETLKW64) {
+
+ /*
+ * If the cmd is requesting file-private locks, then set the
+ * FL_FILE_PVT flag and override the owner.
+ */
+ switch (cmd) {
+ case F_SETLKP:
+ cmd = F_SETLK64;
+ file_lock->fl_flags |= FL_FILE_PVT;
+ file_lock->fl_owner = (fl_owner_t)filp;
+ break;
+ case F_SETLKPW:
+ cmd = F_SETLKW64;
+ file_lock->fl_flags |= FL_FILE_PVT;
+ file_lock->fl_owner = (fl_owner_t)filp;
+ /* Fallthrough */
+ case F_SETLKW64:
file_lock->fl_flags |= FL_SLEEP;
}
-
+
error = do_lock_file_wait(filp, cmd, file_lock);
/*
@@ -2221,6 +2265,8 @@ void locks_remove_file(struct file *filp)
if (!inode->i_flock)
return;
+ locks_remove_posix(filp, (fl_owner_t)filp);
+
if (filp->f_op->flock) {
struct file_lock fl = {
.fl_pid = current->tgid,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 05:11:37 +0000