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