3 fixes to ksmbd server

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Merge tag '5.18-rc3-ksmbd-fixes' of git://git.samba.org/ksmbd

Pull ksmbd server fixes from Steve French:

 - cap maximum sector size reported to avoid mount problems

 - reference count fix

 - fix filename rename race

* tag '5.18-rc3-ksmbd-fixes' of git://git.samba.org/ksmbd:
  ksmbd: set fixed sector size to FS_SECTOR_SIZE_INFORMATION
  ksmbd: increment reference count of parent fp
  ksmbd: remove filename in ksmbd_file

fs/ksmbd/misc.c

@@ -158,19 +158,41 @@ out:
  * Return : windows path string or error
  */
 
-char *convert_to_nt_pathname(char *filename)
+char *convert_to_nt_pathname(struct ksmbd_share_config *share,
+			     struct path *path)
 {
-	char *ab_pathname;
+	char *pathname, *ab_pathname, *nt_pathname;
+	int share_path_len = share->path_sz;
 
-	if (strlen(filename) == 0)
-		filename = "\\";
+	pathname = kmalloc(PATH_MAX, GFP_KERNEL);
+	if (!pathname)
+		return ERR_PTR(-EACCES);
 
-	ab_pathname = kstrdup(filename, GFP_KERNEL);
-	if (!ab_pathname)
-		return NULL;
+	ab_pathname = d_path(path, pathname, PATH_MAX);
+	if (IS_ERR(ab_pathname)) {
+		nt_pathname = ERR_PTR(-EACCES);
+		goto free_pathname;
+	}
 
-	ksmbd_conv_path_to_windows(ab_pathname);
-	return ab_pathname;
+	if (strncmp(ab_pathname, share->path, share_path_len)) {
+		nt_pathname = ERR_PTR(-EACCES);
+		goto free_pathname;
+	}
+
+	nt_pathname = kzalloc(strlen(&ab_pathname[share_path_len]) + 2, GFP_KERNEL);
+	if (!nt_pathname) {
+		nt_pathname = ERR_PTR(-ENOMEM);
+		goto free_pathname;
+	}
+	if (ab_pathname[share_path_len] == '\0')
+		strcpy(nt_pathname, "/");
+	strcat(nt_pathname, &ab_pathname[share_path_len]);
+
+	ksmbd_conv_path_to_windows(nt_pathname);
+
+free_pathname:
+	kfree(pathname);
+	return nt_pathname;
 }
 
 int get_nlink(struct kstat *st)

fs/ksmbd/misc.h

@@ -14,7 +14,8 @@ struct ksmbd_file;
 int match_pattern(const char *str, size_t len, const char *pattern);
 int ksmbd_validate_filename(char *filename);
 int parse_stream_name(char *filename, char **stream_name, int *s_type);
-char *convert_to_nt_pathname(char *filename);
+char *convert_to_nt_pathname(struct ksmbd_share_config *share,
+			     struct path *path);
 int get_nlink(struct kstat *st);
 void ksmbd_conv_path_to_unix(char *path);
 void ksmbd_strip_last_slash(char *path);

fs/ksmbd/oplock.c

@@ -1694,33 +1694,3 @@ out:
 	read_unlock(&lease_list_lock);
 	return ret_op;
 }
-
-int smb2_check_durable_oplock(struct ksmbd_file *fp,
-			      struct lease_ctx_info *lctx, char *name)
-{
-	struct oplock_info *opinfo = opinfo_get(fp);
-	int ret = 0;
-
-	if (opinfo && opinfo->is_lease) {
-		if (!lctx) {
-			pr_err("open does not include lease\n");
-			ret = -EBADF;
-			goto out;
-		}
-		if (memcmp(opinfo->o_lease->lease_key, lctx->lease_key,
-			   SMB2_LEASE_KEY_SIZE)) {
-			pr_err("invalid lease key\n");
-			ret = -EBADF;
-			goto out;
-		}
-		if (name && strcmp(fp->filename, name)) {
-			pr_err("invalid name reconnect %s\n", name);
-			ret = -EINVAL;
-			goto out;
-		}
-	}
-out:
-	if (opinfo)
-		opinfo_put(opinfo);
-	return ret;
-}

fs/ksmbd/oplock.h

@@ -124,6 +124,4 @@ struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn,
 int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci,
 			struct lease_ctx_info *lctx);
 void destroy_lease_table(struct ksmbd_conn *conn);
-int smb2_check_durable_oplock(struct ksmbd_file *fp,
-			      struct lease_ctx_info *lctx, char *name);
 #endif /* __KSMBD_OPLOCK_H */

fs/ksmbd/smb2pdu.c

@@ -11,6 +11,7 @@
 #include <linux/statfs.h>
 #include <linux/ethtool.h>
 #include <linux/falloc.h>
+#include <linux/mount.h>
 
 #include "glob.h"
 #include "smbfsctl.h"
@@ -2918,7 +2919,6 @@ int smb2_open(struct ksmbd_work *work)
 		goto err_out;
 	}
 
-	fp->filename = name;
 	fp->cdoption = req->CreateDisposition;
 	fp->daccess = daccess;
 	fp->saccess = req->ShareAccess;
@@ -3270,14 +3270,13 @@ err_out1:
 		if (!rsp->hdr.Status)
 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
 
-		if (!fp || !fp->filename)
-			kfree(name);
 		if (fp)
 			ksmbd_fd_put(work, fp);
 		smb2_set_err_rsp(work);
 		ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
 	}
 
+	kfree(name);
 	kfree(lc);
 
 	return 0;
@@ -3895,8 +3894,6 @@ int smb2_query_dir(struct ksmbd_work *work)
 		ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
 	}
 
-	ksmbd_debug(SMB, "Directory name is %s\n", dir_fp->filename);
-
 	if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
 		ksmbd_debug(SMB, "Restart directory scan\n");
 		generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
@@ -4390,9 +4387,9 @@ static int get_file_all_info(struct ksmbd_work *work,
 		return -EACCES;
 	}
 
-	filename = convert_to_nt_pathname(fp->filename);
-	if (!filename)
-		return -ENOMEM;
+	filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
+	if (IS_ERR(filename))
+		return PTR_ERR(filename);
 
 	inode = file_inode(fp->filp);
 	generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
@@ -4999,15 +4996,17 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,
 	case FS_SECTOR_SIZE_INFORMATION:
 	{
 		struct smb3_fs_ss_info *info;
+		unsigned int sector_size =
+			min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
 
 		info = (struct smb3_fs_ss_info *)(rsp->Buffer);
 
-		info->LogicalBytesPerSector = cpu_to_le32(stfs.f_bsize);
+		info->LogicalBytesPerSector = cpu_to_le32(sector_size);
 		info->PhysicalBytesPerSectorForAtomicity =
-				cpu_to_le32(stfs.f_bsize);
-		info->PhysicalBytesPerSectorForPerf = cpu_to_le32(stfs.f_bsize);
+				cpu_to_le32(sector_size);
+		info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
 		info->FSEffPhysicalBytesPerSectorForAtomicity =
-				cpu_to_le32(stfs.f_bsize);
+				cpu_to_le32(sector_size);
 		info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
 				    SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
 		info->ByteOffsetForSectorAlignment = 0;
@@ -5683,8 +5682,7 @@ static int set_file_allocation_info(struct ksmbd_work *work,
 		size = i_size_read(inode);
 		rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
 		if (rc) {
-			pr_err("truncate failed! filename : %s, err %d\n",
-			       fp->filename, rc);
+			pr_err("truncate failed!, err %d\n", rc);
 			return rc;
 		}
 		if (size < alloc_blks * 512)
@@ -5714,12 +5712,10 @@ static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 	 * truncated range.
 	 */
 	if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
-		ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
-			    fp->filename, newsize);
+		ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
 		rc = ksmbd_vfs_truncate(work, fp, newsize);
 		if (rc) {
-			ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
-				    fp->filename, rc);
+			ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
 			if (rc != -EAGAIN)
 				rc = -EBADF;
 			return rc;
@@ -5765,8 +5761,10 @@ static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 	if (parent_fp) {
 		if (parent_fp->daccess & FILE_DELETE_LE) {
 			pr_err("parent dir is opened with delete access\n");
+			ksmbd_fd_put(work, parent_fp);
 			return -ESHARE;
 		}
+		ksmbd_fd_put(work, parent_fp);
 	}
 next:
 	return smb2_rename(work, fp, user_ns, rename_info,

fs/ksmbd/vfs.c

@@ -398,8 +398,7 @@ int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,
 
 	nbytes = kernel_read(filp, rbuf, count, pos);
 	if (nbytes < 0) {
-		pr_err("smb read failed for (%s), err = %zd\n",
-		       fp->filename, nbytes);
+		pr_err("smb read failed, err = %zd\n", nbytes);
 		return nbytes;
 	}
 
@@ -875,8 +874,7 @@ int ksmbd_vfs_truncate(struct ksmbd_work *work,
 
 	err = vfs_truncate(&filp->f_path, size);
 	if (err)
-		pr_err("truncate failed for filename : %s err %d\n",
-		       fp->filename, err);
+		pr_err("truncate failed, err %d\n", err);
 	return err;
 }
 

fs/ksmbd/vfs_cache.c

@@ -328,7 +328,6 @@ static void __ksmbd_close_fd(struct ksmbd_file_table *ft, struct ksmbd_file *fp)
 		kfree(smb_lock);
 	}
 
-	kfree(fp->filename);
 	if (ksmbd_stream_fd(fp))
 		kfree(fp->stream.name);
 	kmem_cache_free(filp_cache, fp);
@@ -497,6 +496,7 @@ struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode)
 	list_for_each_entry(lfp, &ci->m_fp_list, node) {
 		if (inode == file_inode(lfp->filp)) {
 			atomic_dec(&ci->m_count);
+			lfp = ksmbd_fp_get(lfp);
 			read_unlock(&ci->m_lock);
 			return lfp;
 		}

fs/ksmbd/vfs_cache.h

@@ -62,7 +62,6 @@ struct ksmbd_inode {
 
 struct ksmbd_file {
 	struct file			*filp;
-	char				*filename;
 	u64				persistent_id;
 	u64				volatile_id;