[linux-cifs-client] [PATCH] cifs: add comments explaining cifs_new_fileinfo behavior
Suresh Jayaraman
sjayaraman at suse.de
Mon May 10 08:30:05 MDT 2010
The comments make it clear the otherwise subtle behavior of cifs_new_fileinfo().
Signed-off-by: Suresh Jayaraman <sjayaraman at suse.de>
--
fs/cifs/dir.c | 18 ++++++++++++++++--
1 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index d791d07..bd363df 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -129,6 +129,12 @@ cifs_bp_rename_retry:
return full_path;
}
+/*
+ * When called with struct file pointer set to NULL, there is no way we could
+ * update file->private_data, but getting it stuck on openFileList provides a
+ * way to access it from cifs_fill_filedata and thereby set file->private_data
+ * from cifs_open.
+ */
struct cifsFileInfo *
cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
struct file *file, struct vfsmount *mnt, unsigned int oflags)
@@ -251,6 +257,10 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
cifs_fattr_to_inode(*pinode, &fattr);
}
+ /*
+ * cifs_fill_filedata() takes care of setting cifsFileInfo pointer to
+ * file->private_data.
+ */
if (mnt)
cifs_new_fileinfo(*pinode, *pnetfid, NULL, mnt, oflags);
@@ -466,8 +476,12 @@ cifs_create_set_dentry:
/* mknod case - do not leave file open */
CIFSSMBClose(xid, tcon, fileHandle);
} else if (!(posix_create) && (newinode)) {
- cifs_new_fileinfo(newinode, fileHandle, NULL,
- nd->path.mnt, oflags);
+ /*
+ * cifs_fill_filedata() takes care of setting cifsFileInfo
+ * pointer to file->private_data.
+ */
+ cifs_new_fileinfo(newinode, fileHandle, NULL, nd->path.mnt,
+ oflags);
}
cifs_create_out:
kfree(buf);
More information about the linux-cifs-client
mailing list