fs: track fl_owner for leases
Just like for other lock types we should allow different owners to have
a read lease on a file. Currently this can't happen, but with the addition
of pNFS layout leases we'll need this feature.
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/locks.c b/fs/locks.c
index 4d0d411..22ac769 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1661,7 +1661,8 @@
*/
error = -EAGAIN;
list_for_each_entry(fl, &ctx->flc_lease, fl_list) {
- if (fl->fl_file == filp) {
+ if (fl->fl_file == filp &&
+ fl->fl_owner == lease->fl_owner) {
my_fl = fl;
continue;
}
@@ -1721,7 +1722,7 @@
return error;
}
-static int generic_delete_lease(struct file *filp)
+static int generic_delete_lease(struct file *filp, void *owner)
{
int error = -EAGAIN;
struct file_lock *fl, *victim = NULL;
@@ -1737,7 +1738,8 @@
spin_lock(&ctx->flc_lock);
list_for_each_entry(fl, &ctx->flc_lease, fl_list) {
- if (fl->fl_file == filp) {
+ if (fl->fl_file == filp &&
+ fl->fl_owner == owner) {
victim = fl;
break;
}
@@ -1778,7 +1780,7 @@
switch (arg) {
case F_UNLCK:
- return generic_delete_lease(filp);
+ return generic_delete_lease(filp, *priv);
case F_RDLCK:
case F_WRLCK:
if (!(*flp)->fl_lmops->lm_break) {
@@ -1857,7 +1859,7 @@
int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
{
if (arg == F_UNLCK)
- return vfs_setlease(filp, F_UNLCK, NULL, NULL);
+ return vfs_setlease(filp, F_UNLCK, NULL, (void **)&filp);
return do_fcntl_add_lease(fd, filp, arg);
}