glusterfs/SOURCES/0273-cluster-ec-Fix-reopen-flags-to-avoid-misbehavior.patch
2021-09-09 17:41:22 +00:00

87 lines
2.9 KiB
Diff

From d5f931b334ac7abccaf30d277ce3ca9cfae0da5b Mon Sep 17 00:00:00 2001
From: Pranith Kumar K <pkarampu@redhat.com>
Date: Mon, 29 Jul 2019 14:08:37 +0530
Subject: [PATCH 273/276] cluster/ec: Fix reopen flags to avoid misbehavior
Problem:
when a file needs to be re-opened O_APPEND and O_EXCL
flags are not filtered in EC.
- O_APPEND should be filtered because EC doesn't send O_APPEND below EC for
open to make sure writes happen on the individual fragments instead of at the
end of the file.
- O_EXCL should be filtered because shd could have created the file so even
when file exists open should succeed
- O_CREAT should be filtered because open happens with gfid as parameter. So
open fop will create just the gfid which will lead to problems.
Fix:
Filter out these two flags in reopen.
Upstream-patch:https://review.gluster.org/#/c/glusterfs/+/23121/
Change-Id: Ia280470fcb5188a09caa07bf665a2a94bce23bc4
fixes: bz#1735514
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/177977
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
xlators/cluster/ec/src/ec-common.c | 4 +++-
xlators/cluster/ec/src/ec-inode-write.c | 7 +++++--
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/xlators/cluster/ec/src/ec-common.c b/xlators/cluster/ec/src/ec-common.c
index 28b31c9..5fb4610 100644
--- a/xlators/cluster/ec/src/ec-common.c
+++ b/xlators/cluster/ec/src/ec-common.c
@@ -101,6 +101,7 @@ ec_fix_open(ec_fop_data_t *fop, uintptr_t mask)
{
uintptr_t need_open = 0;
int ret = 0;
+ int32_t flags = 0;
loc_t loc = {
0,
};
@@ -121,6 +122,7 @@ ec_fix_open(ec_fop_data_t *fop, uintptr_t mask)
goto out;
}
+ flags = fop->fd->flags & (~(O_TRUNC | O_APPEND | O_CREAT | O_EXCL));
if (IA_IFDIR == fop->fd->inode->ia_type) {
ec_opendir(fop->frame, fop->xl, need_open,
EC_MINIMUM_ONE | EC_FOP_NO_PROPAGATE_ERROR, NULL, NULL,
@@ -128,7 +130,7 @@ ec_fix_open(ec_fop_data_t *fop, uintptr_t mask)
} else {
ec_open(fop->frame, fop->xl, need_open,
EC_MINIMUM_ONE | EC_FOP_NO_PROPAGATE_ERROR, NULL, NULL, &loc,
- fop->fd->flags & (~O_TRUNC), fop->fd, NULL);
+ flags, fop->fd, NULL);
}
out:
diff --git a/xlators/cluster/ec/src/ec-inode-write.c b/xlators/cluster/ec/src/ec-inode-write.c
index 4f35b6d..2f28e11 100644
--- a/xlators/cluster/ec/src/ec-inode-write.c
+++ b/xlators/cluster/ec/src/ec-inode-write.c
@@ -1985,10 +1985,13 @@ ec_get_lock_good_mask(inode_t *inode, xlator_t *xl)
LOCK(&inode->lock);
{
ictx = __ec_inode_get(inode, xl);
- lock = ictx->inode_lock;
+ if (ictx)
+ lock = ictx->inode_lock;
}
UNLOCK(&inode->lock);
- return lock->good_mask;
+ if (lock)
+ return lock->good_mask;
+ return 0;
}
void
--
1.8.3.1