diff options
| -rw-r--r-- | fs/cifs/smb2ops.c | 116 |
1 files changed, 116 insertions, 0 deletions
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 |