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SMB3: Backup intent flag missing for directory opens with backupuid mounts

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When "backup intent" is requested on the mount (e.g. backupuid or
backupgid mount options), the corresponding flag needs to be set
on opens of directories (and files) but was missing in some
places causing access denied trying to enumerate and backup
servers.

Fixes kernel bugzilla #200953
https://bugzilla.kernel.org/show_bug.cgi?id=200953

Reported-and-tested-by: <whh@rubrik.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Steve French 2018-08-27 17:04:13 -05:00
parent c15e3f19a6
commit 5e19697b56
2 changed files with 22 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/cifs/inode.c
View File

@ -467,6 +467,8 @@ cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
oparms.cifs_sb = cifs_sb;
oparms.desired_access = GENERIC_READ;
oparms.create_options = CREATE_NOT_DIR;
if (backup_cred(cifs_sb))
oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
oparms.disposition = FILE_OPEN;
oparms.path = path;
oparms.fid = &fid;

15
fs/cifs/smb2ops.c
View File

@ -630,6 +630,9 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
@ -779,6 +782,9 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_EA;
oparms.disposition = FILE_OPEN;
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
@ -858,6 +864,9 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
oparms.tcon = tcon;
oparms.desired_access = FILE_WRITE_EA;
oparms.disposition = FILE_OPEN;
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
@ -1453,6 +1462,9 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
oparms.disposition = FILE_OPEN;
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
oparms.fid = fid;
oparms.reconnect = false;
@ -1857,6 +1869,9 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
if (backup_cred(cifs_sb))
oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
else
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;