> Why not include it inlined in the mail body?
Inlined as requested.
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index c6aad77..aaa6f37 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -618,6 +618,26 @@ static loff_t cifs_llseek(struct file *file,
loff_t offset, int origin)
return generic_file_llseek_unlocked(file, offset, origin);
}
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
+{
+ /* note that this is called by vfs setlease with the BKL held
+ although I doubt that BKL is needed here in cifs */
+
+ if (!(S_ISREG(inode->i_mode))
+ return -EINVAL;
+
+ /* check if file is oplocked */
+ if (((arg == F_RDLCK) &&
+ (CIFS_I(file->f_path.dentry->d_inode)->clientCanCacheRead)) ||
+ ((arg == F_WRLCK) &&
+ (CIFS_I(file->f_path.dentry->d_inode)->clientCanCacheAll)))
+ return generic_setlease(file, arg, lease);
+ else
+ return -EAGAIN;
+}
+#endif
+
struct file_system_type cifs_fs_type = {
.owner = THIS_MODULE,
.name = "cifs",
@@ -696,6 +716,7 @@ const struct file_operations cifs_file_ops = {
#ifdef CONFIG_CIFS_EXPERIMENTAL
.dir_notify = cifs_dir_notify,
+ .setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -716,6 +737,7 @@ const struct file_operations cifs_file_direct_ops = {
.llseek = cifs_llseek,
#ifdef CONFIG_CIFS_EXPERIMENTAL
.dir_notify = cifs_dir_notify,
+ .setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
const struct file_operations cifs_file_nobrl_ops = {
@@ -736,6 +758,7 @@ const struct file_operations cifs_file_nobrl_ops = {
#ifdef CONFIG_CIFS_EXPERIMENTAL
.dir_notify = cifs_dir_notify,
+ .setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -755,6 +778,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
.llseek = cifs_llseek,
#ifdef CONFIG_CIFS_EXPERIMENTAL
.dir_notify = cifs_dir_notify,
+ .setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -946,6 +970,12 @@ static int cifs_oplock_thread(void *dummyarg)
the call */
/* mutex_lock(&inode->i_mutex);*/
if (S_ISREG(inode->i_mode)) {
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ if (CIFS_I(inode)->clientCanCacheAll == 0)
+ break_lease(inode, FMODE_READ);
+ else if (CIFS_I(inode)->clientCanCacheRead == 0)
+ break_lease(inode, FMODE_WRITE);
+#endif
rc = filemap_fdatawrite(inode->i_mapping);
if (CIFS_I(inode)->clientCanCacheRead == 0) {
waitrc = filemap_fdatawait(
> On Wed, Oct 22, 2008 at 6:03 AM, Steve French <smfrench@xxxxxxxxx> wrote:
>> fcntl(F_SETLEASE) currently is not exported by cifs (nor by local file
>> systems) so cifs grants leases based on how other local processes have
>> opened the file not by whether the file is cacheable (oplocked). This
>> adds the check to make sure that the file is cacheable on the client
>> before checking whether we can grant the lease locally
>> (generic_setlease).
--
Thanks,
Steve
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