From: Jingbo Xu <jefflexu@linux.alibaba.com>
To: xiang@kernel.org, chao@kernel.org, huyue2@coolpad.com,
linux-erofs@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH v5 2/6] erofs: enhance erofs_xattr_iter_fixup() helper
Date: Thu, 1 Jun 2023 10:43:43 +0800 [thread overview]
Message-ID: <20230601024347.108469-3-jefflexu@linux.alibaba.com> (raw)
In-Reply-To: <20230601024347.108469-1-jefflexu@linux.alibaba.com>
Enhance erofs_xattr_iter_fixup() helper so that it could be reused in
the situation where it.ofs could not span the block boundary.
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
---
fs/erofs/xattr.c | 73 ++++++++++++++++++++----------------------------
1 file changed, 31 insertions(+), 42 deletions(-)
diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index d9e041d27a35..0fd574e94c8b 100644
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -29,6 +29,24 @@ struct xattr_iter {
unsigned int ofs;
};
+static inline int erofs_xattr_iter_fixup(struct xattr_iter *it, bool nospan)
+{
+ if (it->ofs < it->sb->s_blocksize)
+ return 0;
+
+ if (nospan && it->ofs != it->sb->s_blocksize) {
+ DBG_BUGON(1);
+ return -EFSCORRUPTED;
+ }
+
+ it->blkaddr += erofs_blknr(it->sb, it->ofs);
+ it->kaddr = erofs_bread(&it->buf, it->blkaddr, EROFS_KMAP);
+ if (IS_ERR(it->kaddr))
+ return PTR_ERR(it->kaddr);
+ it->ofs = erofs_blkoff(it->sb, it->ofs);
+ return 0;
+}
+
static int erofs_init_inode_xattrs(struct inode *inode)
{
struct erofs_inode *const vi = EROFS_I(inode);
@@ -80,6 +98,7 @@ static int erofs_init_inode_xattrs(struct inode *inode)
goto out_unlock;
}
+ it.sb = sb;
it.buf = __EROFS_BUF_INITIALIZER;
erofs_init_metabuf(&it.buf, sb);
it.blkaddr = erofs_blknr(sb, erofs_iloc(inode) + vi->inode_isize);
@@ -106,18 +125,11 @@ static int erofs_init_inode_xattrs(struct inode *inode)
it.ofs += sizeof(struct erofs_xattr_ibody_header);
for (i = 0; i < vi->xattr_shared_count; ++i) {
- if (it.ofs >= sb->s_blocksize) {
- /* cannot be unaligned */
- DBG_BUGON(it.ofs != sb->s_blocksize);
-
- it.kaddr = erofs_bread(&it.buf, ++it.blkaddr, EROFS_KMAP);
- if (IS_ERR(it.kaddr)) {
- kfree(vi->xattr_shared_xattrs);
- vi->xattr_shared_xattrs = NULL;
- ret = PTR_ERR(it.kaddr);
- goto out_unlock;
- }
- it.ofs = 0;
+ ret = erofs_xattr_iter_fixup(&it, true);
+ if (ret) {
+ kfree(vi->xattr_shared_xattrs);
+ vi->xattr_shared_xattrs = NULL;
+ goto out_unlock;
}
vi->xattr_shared_xattrs[i] =
le32_to_cpu(*(__le32 *)(it.kaddr + it.ofs));
@@ -150,19 +162,6 @@ struct xattr_iter_handlers {
unsigned int len);
};
-static inline int xattr_iter_fixup(struct xattr_iter *it)
-{
- if (it->ofs < it->sb->s_blocksize)
- return 0;
-
- it->blkaddr += erofs_blknr(it->sb, it->ofs);
- it->kaddr = erofs_bread(&it->buf, it->blkaddr, EROFS_KMAP);
- if (IS_ERR(it->kaddr))
- return PTR_ERR(it->kaddr);
- it->ofs = erofs_blkoff(it->sb, it->ofs);
- return 0;
-}
-
static int inline_xattr_iter_begin(struct xattr_iter *it,
struct inode *inode)
{
@@ -199,7 +198,7 @@ static int xattr_foreach(struct xattr_iter *it,
int err;
/* 0. fixup blkaddr, ofs, ipage */
- err = xattr_iter_fixup(it);
+ err = erofs_xattr_iter_fixup(it, false);
if (err)
return err;
@@ -234,14 +233,9 @@ static int xattr_foreach(struct xattr_iter *it,
processed = 0;
while (processed < entry.e_name_len) {
- if (it->ofs >= it->sb->s_blocksize) {
- DBG_BUGON(it->ofs > it->sb->s_blocksize);
-
- err = xattr_iter_fixup(it);
- if (err)
- goto out;
- it->ofs = 0;
- }
+ err = erofs_xattr_iter_fixup(it, true);
+ if (err)
+ goto out;
slice = min_t(unsigned int, it->sb->s_blocksize - it->ofs,
entry.e_name_len - processed);
@@ -269,14 +263,9 @@ static int xattr_foreach(struct xattr_iter *it,
}
while (processed < value_sz) {
- if (it->ofs >= it->sb->s_blocksize) {
- DBG_BUGON(it->ofs > it->sb->s_blocksize);
-
- err = xattr_iter_fixup(it);
- if (err)
- goto out;
- it->ofs = 0;
- }
+ err = erofs_xattr_iter_fixup(it, true);
+ if (err)
+ goto out;
slice = min_t(unsigned int, it->sb->s_blocksize - it->ofs,
value_sz - processed);
--
2.19.1.6.gb485710b
next prev parent reply other threads:[~2023-06-01 2:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-01 2:43 [PATCH v5 0/6] erofs: cleanup of xattr handling Jingbo Xu
2023-06-01 2:43 ` [PATCH v5 1/6] erofs: convert erofs_read_metabuf() to erofs_bread() for xattr Jingbo Xu
2023-06-01 3:01 ` Gao Xiang
2023-06-01 2:43 ` Jingbo Xu [this message]
2023-06-01 3:03 ` [PATCH v5 2/6] erofs: enhance erofs_xattr_iter_fixup() helper Gao Xiang
2023-06-01 2:43 ` [PATCH v5 3/6] erofs: unify xattr_iter structures Jingbo Xu
2023-06-01 3:26 ` Gao Xiang
2023-06-01 2:43 ` [PATCH v5 4/6] erofs: make the size of read data stored in buffer_ofs Jingbo Xu
2023-06-01 3:29 ` Gao Xiang
2023-06-01 2:43 ` [PATCH v5 5/6] erofs: unify inline/share xattr iterators for listxattr/getxattr Jingbo Xu
2023-06-01 2:43 ` [PATCH v5 6/6] erofs: use separate xattr parsers " Jingbo Xu
2023-06-01 3:37 ` Gao Xiang
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=20230601024347.108469-3-jefflexu@linux.alibaba.com \
--to=jefflexu@linux.alibaba.com \
--cc=chao@kernel.org \
--cc=huyue2@coolpad.com \
--cc=linux-erofs@lists.ozlabs.org \
--cc=linux-kernel@vger.kernel.org \
--cc=xiang@kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).