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Diffstat (limited to 'fs/ceph/caps.c')
-rw-r--r--fs/ceph/caps.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 102192c90edd..d17bde5d4f9a 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2780,12 +2780,17 @@ int ceph_get_caps(struct file *filp, int need, int want,
struct ceph_file_info *fi = filp->private_data;
struct inode *inode = file_inode(filp);
struct ceph_inode_info *ci = ceph_inode(inode);
+ struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
int ret, _got, flags;
ret = ceph_pool_perm_check(inode, need);
if (ret < 0)
return ret;
+ if ((fi->fmode & CEPH_FILE_MODE_WR) &&
+ fi->filp_gen != READ_ONCE(fsc->filp_gen))
+ return -EBADF;
+
while (true) {
if (endoff > 0)
check_max_size(inode, endoff);
@@ -2814,6 +2819,14 @@ int ceph_get_caps(struct file *filp, int need, int want,
if (ret == -EAGAIN)
continue;
}
+
+ if ((fi->fmode & CEPH_FILE_MODE_WR) &&
+ fi->filp_gen != READ_ONCE(fsc->filp_gen)) {
+ if (ret >= 0 && _got)
+ ceph_put_cap_refs(ci, _got);
+ return -EBADF;
+ }
+
if (ret < 0) {
if (ret == -ESTALE) {
/* session was killed, try renew caps */