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From 5b628662aa823770179c5592c182dd8b6acc9b1d Mon Sep 17 00:00:00 2001
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From: N Balachandran <nbalacha@redhat.com>
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Date: Thu, 23 Aug 2018 18:38:01 +0530
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Subject: [PATCH 359/359] storage/posix: Increment trusted.pgfid in posix_mknod
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The value of trusted.pgfid.xx was always set to 1
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in posix_mknod. This is incorrect if posix_mknod
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calls posix_create_link_if_gfid_exists.
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upstream patch: https://review.gluster.org/#/c/glusterfs/+/20875/
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> Change-Id: Ibe87ca6f155846b9a7c7abbfb1eb8b6a99a5eb68
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> fixes: bz#1619720
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> Signed-off-by: N Balachandran <nbalacha@redhat.com>
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Change-Id: Iaa7ad44b918eed28718f62c312f2d8edf01b9256
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BUG: 1620765
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Signed-off-by: N Balachandran <nbalacha@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/147891
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Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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---
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 tests/bugs/posix/bug-1619720.t    | 57 +++++++++++++++++++++++++++++++++++++++
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 xlators/storage/posix/src/posix.c | 18 ++++++++++---
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 2 files changed, 71 insertions(+), 4 deletions(-)
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 create mode 100755 tests/bugs/posix/bug-1619720.t
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diff --git a/tests/bugs/posix/bug-1619720.t b/tests/bugs/posix/bug-1619720.t
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new file mode 100755
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index 0000000..5e0d0f7
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--- /dev/null
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+++ b/tests/bugs/posix/bug-1619720.t
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@@ -0,0 +1,57 @@
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+#!/bin/bash
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+
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+. $(dirname $0)/../../include.rc
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+. $(dirname $0)/../../dht.rc
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+
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+cleanup;
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+
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+
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+# Test steps:
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+# The test checks to make sure that the trusted.pgfid.xx xattr is set on
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+# both the linkto and data files post the final rename.
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+# The test creates files file-1 and file-3 so that src_hashed = dst_hashed,
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+# src_cached = dst_cached and xxx_hashed != xxx_cached.
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+# It then renames file-1 to file-3 which triggers the posix_mknod call
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+# which updates the trusted.pgfid.xx xattr.
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+
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+
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+TEST glusterd
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+TEST pidof glusterd
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+
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+TEST $CLI volume create $V0 $H0:$B0/${V0}0 $H0:$B0/${V0}1
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+TEST $CLI volume start $V0
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+TEST $CLI volume set $V0 storage.build-pgfid on
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+
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+## Mount FUSE
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+TEST glusterfs -s $H0 --volfile-id $V0 $M0;
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+
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+TEST mkdir $M0/tmp
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+
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+
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+
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+# Not the best way to do this but I need files which hash to the same subvol and
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+# whose cached subvols are the same.
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+# In a 2 subvol distributed volume, file-{1,3} hash to the same subvol.
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+# file-2 will hash to the other subvol
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+
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+TEST touch $M0/tmp/file-2
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+pgfid_xattr_name=$(getfattr -m "trusted.pgfid.*" $B0/${V0}1/tmp/file-2 | grep "trusted.pgfid")
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+echo $pgfid_xattr_name
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+
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+
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+TEST mv $M0/tmp/file-2 $M0/tmp/file-1
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+TEST touch $M0/tmp/file-2
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+TEST mv $M0/tmp/file-2 $M0/tmp/file-3
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+
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+# At this point, both the file-1 and file-3 data files exist on one subvol
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+# and both linkto files on the other
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+
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+TEST mv -f $M0/tmp/file-1 $M0/tmp/file-3
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+
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+TEST getfattr -n $pgfid_xattr_name $B0/${V0}0/tmp/file-3
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+TEST getfattr -n $pgfid_xattr_name $B0/${V0}1/tmp/file-3
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+
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+# Not required for the test but an extra check if required.
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+# The linkto file was not renamed Without the fix.
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+#TEST mv $M0/tmp/file-3 $M0/tmp/file-6
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+cleanup;
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diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c
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index 28d2e6f..5088469 100644
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--- a/xlators/storage/posix/src/posix.c
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+++ b/xlators/storage/posix/src/posix.c
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@@ -1427,6 +1427,7 @@ posix_mknod (call_frame_t *frame, xlator_t *this,
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         gf_boolean_t          entry_created   = _gf_false, gfid_set = _gf_false;
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         gf_boolean_t          linked          = _gf_false;
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         gf_loglevel_t         level           = GF_LOG_NONE;
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+        posix_inode_ctx_t     *ctx            = NULL;
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         DECLARE_OLD_FS_ID_VAR;
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@@ -1556,10 +1557,20 @@ post_op:
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         if (priv->update_pgfid_nlinks) {
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                 MAKE_PGFID_XATTR_KEY (pgfid_xattr_key, PGFID_XATTR_KEY_PREFIX,
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                                       loc->pargfid);
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-                nlink_samepgfid = 1;
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+                op_ret = posix_inode_ctx_get_all (loc->inode, this, &ctx;;
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+                if (op_ret < 0) {
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+                        op_errno = ENOMEM;
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+                        goto out;
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+                }
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-                SET_PGFID_XATTR (real_path, pgfid_xattr_key, nlink_samepgfid,
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-                                 XATTR_CREATE, op_ret, this, ignore);
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+                pthread_mutex_lock (&ctx->pgfid_lock);
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+                {
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+                        LINK_MODIFY_PGFID_XATTR (real_path, pgfid_xattr_key,
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+                                                 nlink_samepgfid, 0, op_ret,
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+                                                 this, unlock);
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+                }
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+unlock:
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+                pthread_mutex_unlock (&ctx->pgfid_lock);
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         }
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         if (priv->gfid2path) {
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@@ -1567,7 +1578,6 @@ post_op:
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                                            loc->name);
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         }
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-ignore:
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         op_ret = posix_entry_create_xattr_set (this, real_path, xdata);
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         if (op_ret) {
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                 if (errno != EEXIST)
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-- 
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1.8.3.1
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