enable fallocate punch hole ("fallocate -p") for SMB3

[deliverable/linux.git] / fs / cifs / cifsfs.c

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 0a4a4d7d407efeb4299b73e1f366013b65c33523..155347e190f93d651e494b11773d4b1ab6c7b91c 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -207,6 +207,19 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
        return 0;
 }
 
+static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
+{
+       struct super_block *sb = file->f_path.dentry->d_sb;
+       struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+       struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+       struct TCP_Server_Info *server = tcon->ses->server;
+
+       if (server->ops->fallocate)
+               return server->ops->fallocate(file, tcon, mode, off, len);
+
+       return -EOPNOTSUPP;
+}
+
 static int cifs_permission(struct inode *inode, int mask)
 {
        struct cifs_sb_info *cifs_sb;
@@ -909,6 +922,7 @@ const struct file_operations cifs_file_ops = {
        .unlocked_ioctl = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
        .setlease = cifs_setlease,
+       .fallocate = cifs_fallocate,
 };
 
 const struct file_operations cifs_file_strict_ops = {
@@ -928,6 +942,7 @@ const struct file_operations cifs_file_strict_ops = {
        .unlocked_ioctl = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
        .setlease = cifs_setlease,
+       .fallocate = cifs_fallocate,
 };
 
 const struct file_operations cifs_file_direct_ops = {
@@ -948,6 +963,7 @@ const struct file_operations cifs_file_direct_ops = {
 #endif /* CONFIG_CIFS_POSIX */
        .llseek = cifs_llseek,
        .setlease = cifs_setlease,
+       .fallocate = cifs_fallocate,
 };
 
 const struct file_operations cifs_file_nobrl_ops = {
@@ -966,6 +982,7 @@ const struct file_operations cifs_file_nobrl_ops = {
        .unlocked_ioctl = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
        .setlease = cifs_setlease,
+       .fallocate = cifs_fallocate,
 };
 
 const struct file_operations cifs_file_strict_nobrl_ops = {
@@ -984,6 +1001,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
        .unlocked_ioctl = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
        .setlease = cifs_setlease,
+       .fallocate = cifs_fallocate,
 };
 
 const struct file_operations cifs_file_direct_nobrl_ops = {
@@ -1003,6 +1021,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
 #endif /* CONFIG_CIFS_POSIX */
        .llseek = cifs_llseek,
        .setlease = cifs_setlease,
+       .fallocate = cifs_fallocate,
 };
 
 const struct file_operations cifs_dir_ops = {