From: Mikhail Pershin <mpershin@whamcloud.com>
Date: Tue, 4 Jul 2023 19:13:58 +0000 (+0300)
Subject: EX-7786 test: get size before fallback to generic
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=ccb1207c0e538919522773ab7ae043175e520e85;p=fs%2Flustre-release.git

EX-7786 test: get size before fallback to generic

If ll_file_seek() falls back to generic_file_llseek_size()
then make sure inode size is reliable

Test-Parameters: testlist=sanity env=ONLY=460f,ONLY_REPEAT=4 clientdistro=el9.1
Signed-off-by: Mikhail Pershin <mpershin@whamcloud.com>
Change-Id: Ieb8c90e66fb19675ba41f0147c0d9cdaf29ea20a
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/51564
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
---

diff --git a/lustre/llite/file.c b/lustre/llite/file.c
index 8006b8f..62a71e2 100644
--- a/lustre/llite/file.c
+++ b/lustre/llite/file.c
@@ -4826,12 +4826,16 @@ static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
 				   CL_FSYNC_LOCAL, 0);
 
 		retval = ll_lseek(file, offset, origin);
-		if (retval >= 0)
+		if (retval >= 0) {
 			retval = vfs_setpos(file, retval, maxbytes);
-		else if (retval == -EOPNOTSUPP)
+		} else if (retval == -EOPNOTSUPP) {
+			retval = ll_glimpse_size(inode);
+			if (retval)
+				RETURN(retval);
 			retval = generic_file_llseek_size(file, offset,
 							  origin, maxbytes,
 							  i_size_read(inode));
+		}
 	} else {
 		retval = generic_file_llseek_size(file, offset, origin,
 						  maxbytes, eof);