posix: reserve option behavior is not correct while using fallocate

Problem: storage.reserve option is not working correctly while
         disk space is allocate throguh fallocate

Solution: In posix_disk_space_check_thread_proc after every 5 sec interval
          it calls posix_disk_space_check to monitor disk space and set the
          flag in posix priv.In 5 sec timestamp user can create big file with
          fallocate that can reach posix reserve limit and no error is shown on
          terminal even limit has reached.
          To resolve the same call posix_disk_space for every fallocate fop
          instead to call by a thread after 5 second

BUG: 1560411
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
Change-Id: I39ba9390e2e6d084eedbf3bcf45cd6d708591577

1 files changed, 9 insertions, 0 deletions

diff --git a/xlators/storage/posix/src/posix-inode-fd-ops.c b/xlators/storage/posix/src/posix-inode-fd-ops.c
index 62f2c2aa1ee..ff82eb19f2d 100644
--- a/xlators/storage/posix/src/posix-inode-fd-ops.c
+++ b/xlators/storage/posix/src/posix-inode-fd-ops.c
@@ -602,6 +602,15 @@ posix_do_fallocate (call_frame_t *frame, xlator_t *this, fd_t *fd,
         VALIDATE_OR_GOTO (fd, out);
 
         priv = this->private;
+
+        /* fallocate case is special so call posix_disk_space_check separately
+           for every fallocate fop instead of calling posix_disk_space with
+           thread after every 5 sec sleep to working correctly storage.reserve
+           option behaviour
+        */
+        if (priv->disk_reserve)
+                posix_disk_space_check (this);
+
         DISK_SPACE_CHECK_AND_GOTO (frame, priv, xdata, ret, ret, out);
 
         ret = posix_fd_ctx_get (fd, this, &pfd, &op_errno);