This is a note to let you know that I've just added the patch titled
ceph: add a dedicated private data for netfs rreq
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ceph-add-a-dedicated-private-data-for-netfs-rreq.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 23ee27dce30e7d3091d6c3143b79f48dab6f9a3e Mon Sep 17 00:00:00 2001
From: Xiubo Li <xiubli@xxxxxxxxxx>
Date: Wed, 10 May 2023 19:55:46 +0800
Subject: ceph: add a dedicated private data for netfs rreq
From: Xiubo Li <xiubli@xxxxxxxxxx>
commit 23ee27dce30e7d3091d6c3143b79f48dab6f9a3e upstream.
We need to save the 'f_ra.ra_pages' to expand the readahead window
later.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 49870056005c ("ceph: convert ceph_readpages to ceph_readahead")
Link: https://lore.kernel.org/ceph-devel/20230504082510.247-1-sehuww@xxxxxxxxxxxxxxxx
Link: https://www.spinics.net/lists/ceph-users/msg76183.html
Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx>
Reviewed-and-tested-by: Hu Weiwen <sehuww@xxxxxxxxxxxxxxxx>
Reviewed-by: Milind Changire <mchangir@xxxxxxxxxx>
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ceph/addr.c | 45 ++++++++++++++++++++++++++++++++++-----------
fs/ceph/super.h | 13 +++++++++++++
2 files changed, 47 insertions(+), 11 deletions(-)
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -362,18 +362,28 @@ static int ceph_init_request(struct netf
{
struct inode *inode = rreq->inode;
int got = 0, want = CEPH_CAP_FILE_CACHE;
+ struct ceph_netfs_request_data *priv;
int ret = 0;
if (rreq->origin != NETFS_READAHEAD)
return 0;
+ priv = kzalloc(sizeof(*priv), GFP_NOFS);
+ if (!priv)
+ return -ENOMEM;
+
if (file) {
struct ceph_rw_context *rw_ctx;
struct ceph_file_info *fi = file->private_data;
+ priv->file_ra_pages = file->f_ra.ra_pages;
+ priv->file_ra_disabled = file->f_mode & FMODE_RANDOM;
+
rw_ctx = ceph_find_rw_context(fi);
- if (rw_ctx)
+ if (rw_ctx) {
+ rreq->netfs_priv = priv;
return 0;
+ }
}
/*
@@ -383,27 +393,40 @@ static int ceph_init_request(struct netf
ret = ceph_try_get_caps(inode, CEPH_CAP_FILE_RD, want, true, &got);
if (ret < 0) {
dout("start_read %p, error getting cap\n", inode);
- return ret;
+ goto out;
}
if (!(got & want)) {
dout("start_read %p, no cache cap\n", inode);
- return -EACCES;
+ ret = -EACCES;
+ goto out;
+ }
+ if (ret == 0) {
+ ret = -EACCES;
+ goto out;
}
- if (ret == 0)
- return -EACCES;
- rreq->netfs_priv = (void *)(uintptr_t)got;
- return 0;
+ priv->caps = got;
+ rreq->netfs_priv = priv;
+
+out:
+ if (ret < 0)
+ kfree(priv);
+
+ return ret;
}
static void ceph_netfs_free_request(struct netfs_io_request *rreq)
{
- struct ceph_inode_info *ci = ceph_inode(rreq->inode);
- int got = (uintptr_t)rreq->netfs_priv;
+ struct ceph_netfs_request_data *priv = rreq->netfs_priv;
+
+ if (!priv)
+ return;
- if (got)
- ceph_put_cap_refs(ci, got);
+ if (priv->caps)
+ ceph_put_cap_refs(ceph_inode(rreq->inode), priv->caps);
+ kfree(priv);
+ rreq->netfs_priv = NULL;
}
const struct netfs_request_ops ceph_netfs_ops = {
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -451,6 +451,19 @@ struct ceph_inode_info {
unsigned long i_work_mask;
};
+struct ceph_netfs_request_data {
+ int caps;
+
+ /*
+ * Maximum size of a file readahead request.
+ * The fadvise could update the bdi's default ra_pages.
+ */
+ unsigned int file_ra_pages;
+
+ /* Set it if fadvise disables file readahead entirely */
+ bool file_ra_disabled;
+};
+
static inline struct ceph_inode_info *
ceph_inode(const struct inode *inode)
{
Patches currently in stable-queue which might be from xiubli@xxxxxxxxxx are
queue-6.4/ceph-fix-blindly-expanding-the-readahead-windows.patch
queue-6.4/ceph-don-t-let-check_caps-skip-sending-responses-for-revoke-msgs.patch
queue-6.4/libceph-harden-msgr2.1-frame-segment-length-checks.patch
queue-6.4/ceph-add-a-dedicated-private-data-for-netfs-rreq.patch
