LU-14301 llite: return EOPNOTSUPP if fallocate is not supported

[fs/lustre-release.git] / lustre / llite / file.c

diff --git a/lustre/llite/file.c b/lustre/llite/file.c
index 2da3896..2e78b2d 100644 (file)
--- a/lustre/llite/file.c
+++ b/lustre/llite/file.c
@@ -5083,6 +5083,14 @@ long ll_fallocate(struct file *filp, int mode, loff_t offset, loff_t len)
        ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FALLOCATE, 1);
 
        rc = cl_falloc(inode, mode, offset, len);
+       /*
+        * ENOTSUPP (524) is an NFSv3 specific error code erroneously
+        * used by Lustre in several places. Retuning it here would
+        * confuse applications that explicity test for EOPNOTSUPP
+        * (95) and fall back to ftruncate().
+        */
+       if (rc == -ENOTSUPP)
+               rc = -EOPNOTSUPP;
 
        RETURN(rc);
 }