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authorJeff Layton <jlayton@redhat.com>2010-06-16 21:40:16 +0400
committerJeff Layton <jlayton@redhat.com>2010-06-16 21:40:16 +0400
commit6ca9f3bae8b1854794dfa63cdd3b88b7dfe24c13 (patch)
treeb2f880172b2e23ca4f57bef5e2141c062351d6ec /fs/cifs/dir.c
parent2422f676fb78942d054f7e7a2c3ceaeb7945d814 (diff)
downloadlinux-6ca9f3bae8b1854794dfa63cdd3b88b7dfe24c13.tar.xz
cifs: pass instantiated filp back after open call
The current scheme of sticking open files on a list and assuming that cifs_open will scoop them off of it is broken and leads to "Busy inodes after umount..." errors at unmount time. The problem is that there is no guarantee that cifs_open will always be called after a ->lookup or ->create operation. If there are permissions or other problems, then it's quite likely that it *won't* be called. Fix this by fully instantiating the filp whenever the file is created and pass that filp back to the VFS. If there is a problem, the VFS can clean up the references. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-and-Tested-by: Suresh Jayaraman <sjayaraman@suse.de>
Diffstat (limited to 'fs/cifs/dir.c')
-rw-r--r--fs/cifs/dir.c35
1 files changed, 27 insertions, 8 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index f49afb9980e7..e7ae78b66fa1 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/namei.h>
#include <linux/mount.h>
+#include <linux/file.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
@@ -184,6 +185,8 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
}
write_unlock(&GlobalSMBSeslock);
+ file->private_data = pCifsFile;
+
return pCifsFile;
}
@@ -463,14 +466,22 @@ cifs_create_set_dentry:
if (newinode && nd && (nd->flags & LOOKUP_OPEN)) {
struct cifsFileInfo *pfile_info;
- /*
- * cifs_fill_filedata() takes care of setting cifsFileInfo
- * pointer to file->private_data.
- */
- pfile_info = cifs_new_fileinfo(newinode, fileHandle, NULL,
+ struct file *filp;
+
+ filp = lookup_instantiate_filp(nd, direntry, generic_file_open);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ CIFSSMBClose(xid, tcon, fileHandle);
+ goto cifs_create_out;
+ }
+
+ pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp,
nd->path.mnt, oflags);
- if (pfile_info == NULL)
+ if (pfile_info == NULL) {
+ fput(filp);
+ CIFSSMBClose(xid, tcon, fileHandle);
rc = -ENOMEM;
+ }
} else {
CIFSSMBClose(xid, tcon, fileHandle);
}
@@ -717,15 +728,23 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
direntry->d_op = &cifs_dentry_ops;
d_add(direntry, newInode);
if (posix_open) {
- cfile = cifs_new_fileinfo(newInode, fileHandle, NULL,
+ filp = lookup_instantiate_filp(nd, direntry,
+ generic_file_open);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ CIFSSMBClose(xid, pTcon, fileHandle);
+ goto lookup_out;
+ }
+
+ cfile = cifs_new_fileinfo(newInode, fileHandle, filp,
nd->path.mnt,
nd->intent.open.flags);
if (cfile == NULL) {
+ fput(filp);
CIFSSMBClose(xid, pTcon, fileHandle);
rc = -ENOMEM;
goto lookup_out;
}
- filp = lookup_instantiate_filp(nd, direntry, NULL);
}
/* since paths are not looked up by component - the parent
directories are presumed to be good here */