lustre: opened file can't have negative dentry

... and ll_md_close() gets inode already equal to file_inode(file),
along with ll_file_release()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index 3f00a40..c3be2f2 100644 (file)
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -266,6 +266,10 @@ static int ll_md_close(struct obd_export *md_exp, struct inode *inode,
 {
        struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
        struct ll_inode_info *lli = ll_i2info(inode);
+       int lockmode;
+       __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
+       struct lustre_handle lockh;
+       ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
        int rc = 0;
 
        /* clear group lock, if present */
@@ -292,39 +296,26 @@ static int ll_md_close(struct obd_export *md_exp, struct inode *inode,
 
        /* Let's see if we have good enough OPEN lock on the file and if
           we can skip talking to MDS */
-       if (file->f_dentry->d_inode) { /* Can this ever be false? */
-               int lockmode;
-               __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK;
-               struct lustre_handle lockh;
-               struct inode *inode = file->f_dentry->d_inode;
-               ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_OPEN}};
-
-               mutex_lock(&lli->lli_och_mutex);
-               if (fd->fd_omode & FMODE_WRITE) {
-                       lockmode = LCK_CW;
-                       LASSERT(lli->lli_open_fd_write_count);
-                       lli->lli_open_fd_write_count--;
-               } else if (fd->fd_omode & FMODE_EXEC) {
-                       lockmode = LCK_PR;
-                       LASSERT(lli->lli_open_fd_exec_count);
-                       lli->lli_open_fd_exec_count--;
-               } else {
-                       lockmode = LCK_CR;
-                       LASSERT(lli->lli_open_fd_read_count);
-                       lli->lli_open_fd_read_count--;
-               }
-               mutex_unlock(&lli->lli_och_mutex);
 
-               if (!md_lock_match(md_exp, flags, ll_inode2fid(inode),
-                                  LDLM_IBITS, &policy, lockmode,
-                                  &lockh)) {
-                       rc = ll_md_real_close(file->f_dentry->d_inode,
-                                             fd->fd_omode);
-               }
+       mutex_lock(&lli->lli_och_mutex);
+       if (fd->fd_omode & FMODE_WRITE) {
+               lockmode = LCK_CW;
+               LASSERT(lli->lli_open_fd_write_count);
+               lli->lli_open_fd_write_count--;
+       } else if (fd->fd_omode & FMODE_EXEC) {
+               lockmode = LCK_PR;
+               LASSERT(lli->lli_open_fd_exec_count);
+               lli->lli_open_fd_exec_count--;
        } else {
-               CERROR("Releasing a file %p with negative dentry %p. Name %s",
-                      file, file->f_dentry, file->f_dentry->d_name.name);
+               lockmode = LCK_CR;
+               LASSERT(lli->lli_open_fd_read_count);
+               lli->lli_open_fd_read_count--;
        }
+       mutex_unlock(&lli->lli_och_mutex);
+
+       if (!md_lock_match(md_exp, flags, ll_inode2fid(inode),
+                          LDLM_IBITS, &policy, lockmode, &lockh))
+               rc = ll_md_real_close(inode, fd->fd_omode);
 
 out:
        LUSTRE_FPRIVATE(file) = NULL;