From 2f1afe25997fc28027ae95d89ccf03e1eef2dca1 Mon Sep 17 00:00:00 2001
From: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Date: Thu, 22 Jun 2017 22:52:05 -0500
Subject: [PATCH] cifs: Use smb 2 - 3 and cifsacl mount options getacl
functions
Git-commit: 2f1afe25997fc28027ae95d89ccf03e1eef2dca1
Patch-mainline: v4.13-rc1
References: bsc#1051510, bsc#1144333
Fill in smb2/3 query acl functions in ops structures and use them.
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
fs/cifs/smb2ops.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 116 insertions(+)
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 88fda3f5d105..f1d9c191c4e4 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1288,6 +1288,107 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
return rc;
}
+static struct cifs_ntsd *
+get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
+ const struct cifs_fid *cifsfid, u32 *pacllen)
+{
+ struct cifs_ntsd *pntsd = NULL;
+ unsigned int xid;
+ int rc = -EOPNOTSUPP;
+ struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+
+ if (IS_ERR(tlink))
+ return ERR_CAST(tlink);
+
+ xid = get_xid();
+ cifs_dbg(FYI, "trying to get acl\n");
+
+ rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
+ cifsfid->volatile_fid, (void **)&pntsd, pacllen);
+ free_xid(xid);
+
+ cifs_put_tlink(tlink);
+
+ cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
+ if (rc)
+ return ERR_PTR(rc);
+ return pntsd;
+
+}
+
+static struct cifs_ntsd *
+get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
+ const char *path, u32 *pacllen)
+{
+ struct cifs_ntsd *pntsd = NULL;
+ u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+ unsigned int xid;
+ int rc;
+ struct cifs_tcon *tcon;
+ struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+ struct cifs_fid fid;
+ struct cifs_open_parms oparms;
+ __le16 *utf16_path;
+
+ cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
+ if (IS_ERR(tlink))
+ return ERR_CAST(tlink);
+
+ tcon = tlink_tcon(tlink);
+ xid = get_xid();
+
+ if (backup_cred(cifs_sb))
+ oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
+ else
+ oparms.create_options = 0;
+
+ utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+ if (!utf16_path)
+ return ERR_PTR(-ENOMEM);
+
+ oparms.tcon = tcon;
+ oparms.desired_access = READ_CONTROL;
+ oparms.disposition = FILE_OPEN;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
+ kfree(utf16_path);
+ if (!rc) {
+ rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
+ fid.volatile_fid, (void **)&pntsd, pacllen);
+ SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+ }
+
+ cifs_put_tlink(tlink);
+ free_xid(xid);
+
+ cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
+ if (rc)
+ return ERR_PTR(rc);
+ return pntsd;
+}
+
+/* Retrieve an ACL from the server */
+static struct cifs_ntsd *
+get_smb2_acl(struct cifs_sb_info *cifs_sb,
+ struct inode *inode, const char *path,
+ u32 *pacllen)
+{
+ struct cifs_ntsd *pntsd = NULL;
+ struct cifsFileInfo *open_file = NULL;
+
+ if (inode)
+ open_file = find_readable_file(CIFS_I(inode), true);
+ if (!open_file)
+ return get_smb2_acl_by_path(cifs_sb, path, pacllen);
+
+ pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
+ cifsFileInfo_put(open_file);
+ return pntsd;
+}
+
+
static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
loff_t offset, loff_t len, bool keep_size)
{
@@ -2393,6 +2494,11 @@ struct smb_version_operations smb20_operations = {
.dir_needs_close = smb2_dir_needs_close,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_ACL
+ .get_acl = get_smb2_acl,
+ .get_acl_by_fid = get_smb2_acl_by_fid,
+/* .set_acl = set_smb3_acl, */
+#endif /* CIFS_ACL */
};
struct smb_version_operations smb21_operations = {
@@ -2477,6 +2583,11 @@ struct smb_version_operations smb21_operations = {
.enum_snapshots = smb3_enum_snapshots,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_ACL
+ .get_acl = get_smb2_acl,
+ .get_acl_by_fid = get_smb2_acl_by_fid,
+/* .set_acl = set_smb3_acl, */
+#endif /* CIFS_ACL */
};
struct smb_version_operations smb30_operations = {
@@ -2571,6 +2682,11 @@ struct smb_version_operations smb30_operations = {
.receive_transform = smb3_receive_transform,
.get_dfs_refer = smb2_get_dfs_refer,
.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_ACL
+ .get_acl = get_smb2_acl,
+ .get_acl_by_fid = get_smb2_acl_by_fid,
+/* .set_acl = set_smb3_acl, */
+#endif /* CIFS_ACL */
};
#ifdef CONFIG_CIFS_SMB311
--
2.16.4