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0f33feda70
glusterfs/0563-features-shard-Use-fd-lookup-post-file-open.patch
James Antill 0f33feda70 Import rpm: c8s
2023-02-27 13:17:02 -05:00

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From a19fa252942938a308ffa655fca3814d0660c6e2 Mon Sep 17 00:00:00 2001
From: Vinayakswami Hariharmath <vharihar@redhat.com>
Date: Wed, 3 Jun 2020 18:58:56 +0530
Subject: [PATCH 563/584] features/shard: Use fd lookup post file open
Issue:
When a process has the open fd and the same file is
unlinked in middle of the operations, then file based
lookup fails with ENOENT or stale file
Solution:
When the file already open and fd is available, use fstat
to get the file attributes
Backport of:
> Upstream-patch: https://review.gluster.org/#/c/glusterfs/+/24528/
> Change-Id: I0e83aee9f11b616dcfe13769ebfcda6742e4e0f4
> Fixes: #1281
> Signed-off-by: Vinayakswami Hariharmath <vharihar@redhat.com>
BUG: 1925425
Change-Id: I0e83aee9f11b616dcfe13769ebfcda6742e4e0f4
Signed-off-by: Vinayakswami Hariharmath <vharihar@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/c/rhs-glusterfs/+/244957
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
tests/bugs/shard/issue-1281.t | 34 +++++++++++
xlators/features/shard/src/shard.c | 119 +++++++++++++++++++++++--------------
2 files changed, 110 insertions(+), 43 deletions(-)
create mode 100644 tests/bugs/shard/issue-1281.t
diff --git a/tests/bugs/shard/issue-1281.t b/tests/bugs/shard/issue-1281.t
new file mode 100644
index 0000000..9704caa
--- /dev/null
+++ b/tests/bugs/shard/issue-1281.t
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 $H0:$B0/${V0}{0,1}
+TEST $CLI volume set $V0 features.shard on
+TEST $CLI volume set $V0 performance.quick-read off
+TEST $CLI volume set $V0 performance.io-cache off
+TEST $CLI volume set $V0 performance.read-ahead off
+TEST $CLI volume set $V0 performance.write-behind off
+TEST $CLI volume start $V0
+
+TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0
+
+#Open a file and store descriptor in fd = 5
+exec 5>$M0/foo
+
+#Unlink the same file which is opened in prev step
+TEST unlink $M0/foo
+
+#Write something on the file using the open fd = 5
+echo "issue-1281" >&5
+
+#Write on the descriptor should be succesful
+EXPECT 0 echo $?
+
+#Close the fd = 5
+exec 5>&-
+
+cleanup
diff --git a/xlators/features/shard/src/shard.c b/xlators/features/shard/src/shard.c
index c5cc224..2ba4528 100644
--- a/xlators/features/shard/src/shard.c
+++ b/xlators/features/shard/src/shard.c
@@ -1653,26 +1653,24 @@ err:
}
int
-shard_lookup_base_file_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
- int32_t op_ret, int32_t op_errno, inode_t *inode,
- struct iatt *buf, dict_t *xdata,
- struct iatt *postparent)
+shard_set_iattr_invoke_post_handler(call_frame_t *frame, xlator_t *this,
+ inode_t *inode, int32_t op_ret,
+ int32_t op_errno, struct iatt *buf,
+ dict_t *xdata)
{
int ret = -1;
int32_t mask = SHARD_INODE_WRITE_MASK;
- shard_local_t *local = NULL;
+ shard_local_t *local = frame->local;
shard_inode_ctx_t ctx = {
0,
};
- local = frame->local;
-
if (op_ret < 0) {
gf_msg(this->name, GF_LOG_ERROR, op_errno,
SHARD_MSG_BASE_FILE_LOOKUP_FAILED,
"Lookup on base file"
" failed : %s",
- loc_gfid_utoa(&(local->loc)));
+ uuid_utoa(inode->gfid));
local->op_ret = op_ret;
local->op_errno = op_errno;
goto unwind;
@@ -1706,18 +1704,57 @@ unwind:
}
int
-shard_lookup_base_file(call_frame_t *frame, xlator_t *this, loc_t *loc,
- shard_post_fop_handler_t handler)
+shard_fstat_base_file_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct iatt *buf,
+ dict_t *xdata)
+{
+ shard_local_t *local = frame->local;
+
+ shard_set_iattr_invoke_post_handler(frame, this, local->fd->inode, op_ret,
+ op_errno, buf, xdata);
+ return 0;
+}
+
+int
+shard_lookup_base_file_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, inode_t *inode,
+ struct iatt *buf, dict_t *xdata,
+ struct iatt *postparent)
+{
+ /* In case of op_ret < 0, inode passed to this function will be NULL
+ ex: in case of op_errno = ENOENT. So refer prefilled inode data
+ which is part of local.
+ Note: Reassigning/overriding the inode passed to this cbk with inode
+ which is part of *struct shard_local_t* won't cause any issue as
+ both inodes have same reference/address as of the inode passed */
+ inode = ((shard_local_t *)frame->local)->loc.inode;
+
+ shard_set_iattr_invoke_post_handler(frame, this, inode, op_ret, op_errno,
+ buf, xdata);
+ return 0;
+}
+
+/* This function decides whether to make file based lookup or
+ * fd based lookup (fstat) depending on the 3rd and 4th arg.
+ * If fd != NULL and loc == NULL then call is for fstat
+ * If fd == NULL and loc != NULL then call is for file based
+ * lookup. Please pass args based on the requirement.
+ */
+int
+shard_refresh_base_file(call_frame_t *frame, xlator_t *this, loc_t *loc,
+ fd_t *fd, shard_post_fop_handler_t handler)
{
int ret = -1;
+ inode_t *inode = NULL;
shard_local_t *local = NULL;
dict_t *xattr_req = NULL;
gf_boolean_t need_refresh = _gf_false;
local = frame->local;
local->handler = handler;
+ inode = fd ? fd->inode : loc->inode;
- ret = shard_inode_ctx_fill_iatt_from_cache(loc->inode, this, &local->prebuf,
+ ret = shard_inode_ctx_fill_iatt_from_cache(inode, this, &local->prebuf,
&need_refresh);
/* By this time, inode ctx should have been created either in create,
* mknod, readdirp or lookup. If not it is a bug!
@@ -1726,7 +1763,7 @@ shard_lookup_base_file(call_frame_t *frame, xlator_t *this, loc_t *loc,
gf_msg_debug(this->name, 0,
"Skipping lookup on base file: %s"
"Serving prebuf off the inode ctx cache",
- uuid_utoa(loc->gfid));
+ uuid_utoa(inode->gfid));
goto out;
}
@@ -1737,10 +1774,14 @@ shard_lookup_base_file(call_frame_t *frame, xlator_t *this, loc_t *loc,
goto out;
}
- SHARD_MD_READ_FOP_INIT_REQ_DICT(this, xattr_req, loc->gfid, local, out);
+ SHARD_MD_READ_FOP_INIT_REQ_DICT(this, xattr_req, inode->gfid, local, out);
- STACK_WIND(frame, shard_lookup_base_file_cbk, FIRST_CHILD(this),
- FIRST_CHILD(this)->fops->lookup, loc, xattr_req);
+ if (fd)
+ STACK_WIND(frame, shard_fstat_base_file_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->fstat, fd, xattr_req);
+ else
+ STACK_WIND(frame, shard_lookup_base_file_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lookup, loc, xattr_req);
dict_unref(xattr_req);
return 0;
@@ -2718,8 +2759,8 @@ shard_truncate(call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset,
local->resolver_base_inode = loc->inode;
GF_ATOMIC_INIT(local->delta_blocks, 0);
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_truncate_handler);
+ shard_refresh_base_file(frame, this, &local->loc, NULL,
+ shard_post_lookup_truncate_handler);
return 0;
err:
@@ -2774,8 +2815,8 @@ shard_ftruncate(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
local->resolver_base_inode = fd->inode;
GF_ATOMIC_INIT(local->delta_blocks, 0);
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_truncate_handler);
+ shard_refresh_base_file(frame, this, NULL, fd,
+ shard_post_lookup_truncate_handler);
return 0;
err:
shard_common_failure_unwind(GF_FOP_FTRUNCATE, frame, -1, ENOMEM);
@@ -2919,8 +2960,8 @@ shard_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
if (!local->xattr_req)
goto err;
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_link_handler);
+ shard_refresh_base_file(frame, this, &local->loc, NULL,
+ shard_post_lookup_link_handler);
return 0;
err:
shard_common_failure_unwind(GF_FOP_LINK, frame, -1, ENOMEM);
@@ -4249,8 +4290,8 @@ shard_post_inodelk_fop_handler(call_frame_t *frame, xlator_t *this)
switch (local->fop) {
case GF_FOP_UNLINK:
case GF_FOP_RENAME:
- shard_lookup_base_file(frame, this, &local->int_inodelk.loc,
- shard_post_lookup_base_shard_rm_handler);
+ shard_refresh_base_file(frame, this, &local->int_inodelk.loc, NULL,
+ shard_post_lookup_base_shard_rm_handler);
break;
default:
gf_msg(this->name, GF_LOG_WARNING, 0, SHARD_MSG_INVALID_FOP,
@@ -4505,8 +4546,8 @@ shard_rename_src_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
if (local->block_size) {
local->tmp_loc.inode = inode_new(this->itable);
gf_uuid_copy(local->tmp_loc.gfid, (local->loc.inode)->gfid);
- shard_lookup_base_file(frame, this, &local->tmp_loc,
- shard_post_rename_lookup_handler);
+ shard_refresh_base_file(frame, this, &local->tmp_loc, NULL,
+ shard_post_rename_lookup_handler);
} else {
shard_rename_cbk(frame, this);
}
@@ -5242,8 +5283,8 @@ shard_readv(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
local->loc.inode = inode_ref(fd->inode);
gf_uuid_copy(local->loc.gfid, fd->inode->gfid);
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_readv_handler);
+ shard_refresh_base_file(frame, this, NULL, fd,
+ shard_post_lookup_readv_handler);
return 0;
err:
shard_common_failure_unwind(GF_FOP_READ, frame, -1, ENOMEM);
@@ -6046,8 +6087,8 @@ shard_fsync(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync,
local->loc.inode = inode_ref(fd->inode);
gf_uuid_copy(local->loc.gfid, fd->inode->gfid);
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_fsync_handler);
+ shard_refresh_base_file(frame, this, NULL, fd,
+ shard_post_lookup_fsync_handler);
return 0;
err:
shard_common_failure_unwind(GF_FOP_FSYNC, frame, -1, ENOMEM);
@@ -6420,12 +6461,8 @@ shard_common_remove_xattr(call_frame_t *frame, xlator_t *this,
if (xdata)
local->xattr_req = dict_ref(xdata);
- /* To-Do: Switch from LOOKUP which is path-based, to FSTAT if the fop is
- * on an fd. This comes under a generic class of bugs in shard tracked by
- * bz #1782428.
- */
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_remove_xattr_handler);
+ shard_refresh_base_file(frame, this, loc, fd,
+ shard_post_lookup_remove_xattr_handler);
return 0;
err:
shard_common_failure_unwind(fop, frame, -1, op_errno);
@@ -6662,12 +6699,8 @@ shard_common_set_xattr(call_frame_t *frame, xlator_t *this, glusterfs_fop_t fop,
if (xdata)
local->xattr_rsp = dict_ref(xdata);
- /* To-Do: Switch from LOOKUP which is path-based, to FSTAT if the fop is
- * on an fd. This comes under a generic class of bugs in shard tracked by
- * bz #1782428.
- */
- shard_lookup_base_file(frame, this, &local->loc,
- shard_post_lookup_set_xattr_handler);
+ shard_refresh_base_file(frame, this, loc, fd,
+ shard_post_lookup_set_xattr_handler);
return 0;
err:
shard_common_failure_unwind(fop, frame, -1, op_errno);
@@ -6951,8 +6984,8 @@ shard_common_inode_write_begin(call_frame_t *frame, xlator_t *this,
local->loc.inode = inode_ref(fd->inode);
gf_uuid_copy(local->loc.gfid, fd->inode->gfid);
- shard_lookup_base_file(frame, this, &local->loc,
- shard_common_inode_write_post_lookup_handler);
+ shard_refresh_base_file(frame, this, NULL, fd,
+ shard_common_inode_write_post_lookup_handler);
return 0;
out:
shard_common_failure_unwind(fop, frame, -1, ENOMEM);
--
1.8.3.1
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