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path: root/fs/smb/client/smb2inode.c
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Diffstat (limited to 'fs/smb/client/smb2inode.c')
-rw-r--r--fs/smb/client/smb2inode.c89
1 files changed, 88 insertions, 1 deletions
diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c
index 7dfd3eb3847b..a11a2a693c51 100644
--- a/fs/smb/client/smb2inode.c
+++ b/fs/smb/client/smb2inode.c
@@ -176,6 +176,7 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
struct kvec *out_iov, int *out_buftype, struct dentry *dentry)
{
+ struct smb2_create_rsp *create_rsp = NULL;
struct smb2_query_info_rsp *qi_rsp = NULL;
struct smb2_compound_vars *vars = NULL;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
@@ -265,7 +266,13 @@ replay_again:
num_rqst++;
rc = 0;
- for (i = 0; i < num_cmds; i++) {
+ i = 0;
+
+ /* Skip the leading explicit OPEN operation */
+ if (num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY)
+ i++;
+
+ for (; i < num_cmds; i++) {
/* Operation */
switch (cmds[i]) {
case SMB2_OP_QUERY_INFO:
@@ -584,6 +591,8 @@ replay_again:
goto finished;
}
num_rqst++;
+ trace_smb3_query_wsl_ea_compound_enter(xid, tcon->tid,
+ ses->Suid, full_path);
break;
default:
cifs_dbg(VFS, "Invalid command\n");
@@ -638,6 +647,29 @@ finished:
}
tmp_rc = rc;
+
+ if (rc == 0 && num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) {
+ create_rsp = rsp_iov[0].iov_base;
+ idata = in_iov[0].iov_base;
+ idata->fi.CreationTime = create_rsp->CreationTime;
+ idata->fi.LastAccessTime = create_rsp->LastAccessTime;
+ idata->fi.LastWriteTime = create_rsp->LastWriteTime;
+ idata->fi.ChangeTime = create_rsp->ChangeTime;
+ idata->fi.Attributes = create_rsp->FileAttributes;
+ idata->fi.AllocationSize = create_rsp->AllocationSize;
+ idata->fi.EndOfFile = create_rsp->EndofFile;
+ if (le32_to_cpu(idata->fi.NumberOfLinks) == 0)
+ idata->fi.NumberOfLinks = cpu_to_le32(1); /* dummy value */
+ idata->fi.DeletePending = 0;
+ idata->fi.Directory = !!(le32_to_cpu(create_rsp->FileAttributes) & ATTR_DIRECTORY);
+
+ /* smb2_parse_contexts() fills idata->fi.IndexNumber */
+ rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch,
+ oparms->fid->lease_key, &oplock, &idata->fi, NULL);
+ if (rc)
+ cifs_dbg(VFS, "rc: %d parsing context of compound op\n", rc);
+ }
+
for (i = 0; i < num_cmds; i++) {
char *buf = rsp_iov[i + i].iov_base;
@@ -648,6 +680,7 @@ finished:
switch (cmds[i]) {
case SMB2_OP_QUERY_INFO:
idata = in_iov[i].iov_base;
+ idata->contains_posix_file_info = false;
if (rc == 0 && cfile && cfile->symlink_target) {
idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
if (!idata->symlink_target)
@@ -671,6 +704,7 @@ finished:
break;
case SMB2_OP_POSIX_QUERY_INFO:
idata = in_iov[i].iov_base;
+ idata->contains_posix_file_info = true;
if (rc == 0 && cfile && cfile->symlink_target) {
idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
if (!idata->symlink_target)
@@ -768,6 +802,7 @@ finished:
idata = in_iov[i].iov_base;
idata->reparse.io.iov = *iov;
idata->reparse.io.buftype = resp_buftype[i + 1];
+ idata->contains_posix_file_info = false; /* BB VERIFY */
rbuf = reparse_buf_ptr(iov);
if (IS_ERR(rbuf)) {
rc = PTR_ERR(rbuf);
@@ -789,6 +824,7 @@ finished:
case SMB2_OP_QUERY_WSL_EA:
if (!rc) {
idata = in_iov[i].iov_base;
+ idata->contains_posix_file_info = false;
qi_rsp = rsp_iov[i + 1].iov_base;
data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset);
size[0] = le32_to_cpu(qi_rsp->OutputBufferLength);
@@ -972,6 +1008,43 @@ int smb2_query_path_info(const unsigned int xid,
case 0:
rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
break;
+ case -EACCES:
+ /*
+ * If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with
+ * STATUS_ACCESS_DENIED then it means that caller does not have permission to
+ * open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue
+ * SMB2_OP_QUERY_INFO command.
+ *
+ * There is an alternative way how to query limited information about path but still
+ * suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful
+ * response subset of query information.
+ *
+ * So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED
+ * access which will grant the maximum possible access to the file and the response
+ * will contain required query information for stat() syscall.
+ */
+
+ if (tcon->posix_extensions)
+ break;
+
+ num_cmds = 1;
+ cmds[0] = SMB2_OP_OPEN_QUERY;
+ in_iov[0].iov_base = data;
+ in_iov[0].iov_len = sizeof(*data);
+ oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, MAXIMUM_ALLOWED,
+ FILE_OPEN, create_options, ACL_NO_MODE);
+ free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
+ rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
+ &oparms, in_iov, cmds, num_cmds,
+ cfile, out_iov, out_buftype, NULL);
+
+ hdr = out_iov[0].iov_base;
+ if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
+ goto out;
+
+ if (!rc)
+ rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
+ break;
case -EOPNOTSUPP:
/*
* BB TODO: When support for special files added to Samba
@@ -1008,6 +1081,11 @@ int smb2_query_path_info(const unsigned int xid,
else
rc = -EOPNOTSUPP;
}
+
+ if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) {
+ bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY;
+ rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb);
+ }
break;
case -EREMOTE:
break;
@@ -1262,6 +1340,15 @@ struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
int rc;
int i;
+ /*
+ * If server filesystem does not support reparse points then do not
+ * attempt to create reparse point. This will prevent creating unusable
+ * empty object on the server.
+ */
+ if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS))
+ if (!tcon->posix_extensions)
+ return ERR_PTR(-EOPNOTSUPP);
+
oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
SYNCHRONIZE | DELETE |
FILE_READ_ATTRIBUTES |
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-21 04:13:17 +0300