From: Jeff Layton <jlayton@kernel.org>
To: linux-kernel@vger.kernel.org, ceph-devel@vger.kernel.org
Cc: akpm@linux-foundation.org, idryomov@gmail.com, zyan@redhat.com,
sage@redhat.com, agruenba@redhat.com
Subject: [PATCH 2/3] ceph: don't NULL terminate virtual xattr strings
Date: Fri, 14 Jun 2019 09:46:24 -0400 [thread overview]
Message-ID: <20190614134625.6870-3-jlayton@kernel.org> (raw)
In-Reply-To: <20190614134625.6870-1-jlayton@kernel.org>
The convention with xattrs is to not NULL terminate string data in the
value. Have ceph use snprintf_noterm to populate virtual xattrs.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/ceph/xattr.c | 44 +++++++++++++++++++++++---------------------
1 file changed, 23 insertions(+), 21 deletions(-)
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 6621d27e64f5..a1cd9613be98 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -71,13 +71,13 @@ static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
down_read(&osdc->lock);
pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
if (pool_name) {
- len = snprintf(buf, sizeof(buf),
+ len = snprintf_noterm(buf, sizeof(buf),
"stripe_unit=%u stripe_count=%u object_size=%u pool=",
ci->i_layout.stripe_unit, ci->i_layout.stripe_count,
ci->i_layout.object_size);
total_len = len + strlen(pool_name);
} else {
- len = snprintf(buf, sizeof(buf),
+ len = snprintf_noterm(buf, sizeof(buf),
"stripe_unit=%u stripe_count=%u object_size=%u pool=%lld",
ci->i_layout.stripe_unit, ci->i_layout.stripe_count,
ci->i_layout.object_size, (unsigned long long)pool);
@@ -115,19 +115,19 @@ static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci,
char *val, size_t size)
{
- return snprintf(val, size, "%u", ci->i_layout.stripe_unit);
+ return snprintf_noterm(val, size, "%u", ci->i_layout.stripe_unit);
}
static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci,
char *val, size_t size)
{
- return snprintf(val, size, "%u", ci->i_layout.stripe_count);
+ return snprintf_noterm(val, size, "%u", ci->i_layout.stripe_count);
}
static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci,
char *val, size_t size)
{
- return snprintf(val, size, "%u", ci->i_layout.object_size);
+ return snprintf_noterm(val, size, "%u", ci->i_layout.object_size);
}
static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci,
@@ -142,9 +142,10 @@ static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci,
down_read(&osdc->lock);
pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
if (pool_name)
- ret = snprintf(val, size, "%s", pool_name);
+ ret = snprintf_noterm(val, size, "%s", pool_name);
else
- ret = snprintf(val, size, "%lld", (unsigned long long)pool);
+ ret = snprintf_noterm(val, size, "%lld",
+ (unsigned long long)pool);
up_read(&osdc->lock);
return ret;
}
@@ -155,7 +156,7 @@ static size_t ceph_vxattrcb_layout_pool_namespace(struct ceph_inode_info *ci,
int ret = 0;
struct ceph_string *ns = ceph_try_get_string(ci->i_layout.pool_ns);
if (ns) {
- ret = snprintf(val, size, "%.*s", (int)ns->len, ns->str);
+ ret = snprintf_noterm(val, size, "%.*s", (int)ns->len, ns->str);
ceph_put_string(ns);
}
return ret;
@@ -166,49 +167,50 @@ static size_t ceph_vxattrcb_layout_pool_namespace(struct ceph_inode_info *ci,
static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs);
+ return snprintf_noterm(val, size, "%lld", ci->i_files + ci->i_subdirs);
}
static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_files);
+ return snprintf_noterm(val, size, "%lld", ci->i_files);
}
static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_subdirs);
+ return snprintf_noterm(val, size, "%lld", ci->i_subdirs);
}
static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs);
+ return snprintf_noterm(val, size, "%lld",
+ ci->i_rfiles + ci->i_rsubdirs);
}
static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_rfiles);
+ return snprintf_noterm(val, size, "%lld", ci->i_rfiles);
}
static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_rsubdirs);
+ return snprintf_noterm(val, size, "%lld", ci->i_rsubdirs);
}
static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld", ci->i_rbytes);
+ return snprintf_noterm(val, size, "%lld", ci->i_rbytes);
}
static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld.%09ld", ci->i_rctime.tv_sec,
+ return snprintf_noterm(val, size, "%lld.%09ld", ci->i_rctime.tv_sec,
ci->i_rctime.tv_nsec);
}
@@ -221,7 +223,7 @@ static bool ceph_vxattrcb_dir_pin_exists(struct ceph_inode_info *ci)
static size_t ceph_vxattrcb_dir_pin(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%d", (int)ci->i_dir_pin);
+ return snprintf_noterm(val, size, "%d", (int)ci->i_dir_pin);
}
/* quotas */
@@ -241,20 +243,20 @@ static bool ceph_vxattrcb_quota_exists(struct ceph_inode_info *ci)
static size_t ceph_vxattrcb_quota(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "max_bytes=%llu max_files=%llu",
+ return snprintf_noterm(val, size, "max_bytes=%llu max_files=%llu",
ci->i_max_bytes, ci->i_max_files);
}
static size_t ceph_vxattrcb_quota_max_bytes(struct ceph_inode_info *ci,
char *val, size_t size)
{
- return snprintf(val, size, "%llu", ci->i_max_bytes);
+ return snprintf_noterm(val, size, "%llu", ci->i_max_bytes);
}
static size_t ceph_vxattrcb_quota_max_files(struct ceph_inode_info *ci,
char *val, size_t size)
{
- return snprintf(val, size, "%llu", ci->i_max_files);
+ return snprintf_noterm(val, size, "%llu", ci->i_max_files);
}
/* snapshots */
@@ -266,7 +268,7 @@ static bool ceph_vxattrcb_snap_btime_exists(struct ceph_inode_info *ci)
static size_t ceph_vxattrcb_snap_btime(struct ceph_inode_info *ci, char *val,
size_t size)
{
- return snprintf(val, size, "%lld.%09ld", ci->i_snap_btime.tv_sec,
+ return snprintf_noterm(val, size, "%lld.%09ld", ci->i_snap_btime.tv_sec,
ci->i_snap_btime.tv_nsec);
}
--
2.21.0
next prev parent reply other threads:[~2019-06-14 13:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 13:46 [PATCH 0/3] ceph: don't NULL terminate virtual xattr values Jeff Layton
2019-06-14 13:46 ` [PATCH 1/3] lib/vsprintf: add snprintf_noterm Jeff Layton
2019-06-15 2:41 ` Yan, Zheng
2019-06-15 2:58 ` Joe Perches
2019-06-15 11:08 ` Jeff Layton
2019-06-15 10:58 ` Jeff Layton
2019-06-14 13:46 ` Jeff Layton [this message]
2019-06-14 13:46 ` [PATCH 3/3] ceph: return -ERANGE if virtual xattr value didn't fit in buffer Jeff Layton
2019-06-14 16:56 ` [PATCH 0/3] ceph: don't NULL terminate virtual xattr values Andreas Gruenbacher
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190614134625.6870-3-jlayton@kernel.org \
--to=jlayton@kernel.org \
--cc=agruenba@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=ceph-devel@vger.kernel.org \
--cc=idryomov@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=sage@redhat.com \
--cc=zyan@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox