1 files changed, 15 insertions, 2 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 582d66ca6da5..136af8a08f45 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -513,6 +513,17 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf,
         return written;
 }
 
+static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+{
+        /* origin == SEEK_END => we must revalidate the cached file length */
+        if (origin == 2) {
+                int retval = cifs_revalidate(file->f_dentry);
+                if (retval < 0)
+                        return (loff_t)retval;
+        }
+        return remote_llseek(file, offset, origin);
+}
+
 static struct file_system_type cifs_fs_type = {
         .owner = THIS_MODULE,
         .name = "cifs",
@@ -586,6 +597,7 @@ struct file_operations cifs_file_ops = {
         .flush = cifs_flush,
         .mmap  = cifs_file_mmap,
         .sendfile = generic_file_sendfile,
+        .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
         .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -609,7 +621,7 @@ struct file_operations cifs_file_direct_ops = {
 #ifdef CONFIG_CIFS_POSIX
         .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+        .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
         .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
@@ -627,6 +639,7 @@ struct file_operations cifs_file_nobrl_ops = {
         .flush = cifs_flush,
         .mmap  = cifs_file_mmap,
         .sendfile = generic_file_sendfile,
+        .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
         .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -649,7 +662,7 @@ struct file_operations cifs_file_direct_nobrl_ops = {
 #ifdef CONFIG_CIFS_POSIX
         .ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
-
+        .llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
         .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */