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authorSteve French <sfrench@us.ibm.com>2007-09-11 07:50:53 +0200
committerSteve French <sfrench@us.ibm.com>2007-09-11 07:50:53 +0200
commit4efa53f0907bb4378015c129a2c11b8d3a90bce2 (patch)
tree030c88b99de6caaf58cee600c5d697460c215b6c /fs
parent[CIFS] Fix oops in find_writable_file (diff)
downloadlinux-4efa53f0907bb4378015c129a2c11b8d3a90bce2.tar.xz
linux-4efa53f0907bb4378015c129a2c11b8d3a90bce2.zip
[CIFS] lock inode open file list in close in case racing with open
Harmless since it only protected turning off caching for the inode, but cleaner to lock around this in case we have a close racing with open. Signed-off-by: Shaggy <shaggy@us.ibm.com> CC: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/file.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index b1807fd1ac40..792549193865 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -545,6 +545,7 @@ int cifs_close(struct inode *inode, struct file *file)
} else
rc = -EBADF;
+ read_lock(&GlobalSMBSeslock);
if (list_empty(&(CIFS_I(inode)->openFileList))) {
cFYI(1, ("closing last open instance for inode %p", inode));
/* if the file is not open we do not know if we can cache info
@@ -552,6 +553,7 @@ int cifs_close(struct inode *inode, struct file *file)
CIFS_I(inode)->clientCanCacheRead = FALSE;
CIFS_I(inode)->clientCanCacheAll = FALSE;
}
+ read_unlock(&GlobalSMBSeslock);
if ((rc == 0) && CIFS_I(inode)->write_behind_rc)
rc = CIFS_I(inode)->write_behind_rc;
FreeXid(xid);