From: Dmitry Kadashev <[email protected]>
To: Jens Axboe <[email protected]>,
Alexander Viro <[email protected]>,
Christian Brauner <[email protected]>,
Linus Torvalds <[email protected]>
Cc: [email protected], [email protected],
Dmitry Kadashev <[email protected]>
Subject: [PATCH v2 06/14] namei: clean up do_mkdirat retry logic
Date: Thu, 15 Jul 2021 17:45:28 +0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
No functional changes, just move the main logic to a helper function to
make the whole thing easier to follow.
Cc: Linus Torvalds <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Christian Brauner <[email protected]>
Suggested-by: Linus Torvalds <[email protected]>
Link: https://lore.kernel.org/io-uring/CAHk-=wijsw1QSsQHFu_6dEoZEr_zvT7++WJWohcuEkLqqXBGrQ@mail.gmail.com/
Signed-off-by: Dmitry Kadashev <[email protected]>
---
fs/namei.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c
index 54dbd1e38298..50ab1cd00983 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3850,18 +3850,16 @@ int vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
}
EXPORT_SYMBOL(vfs_mkdir);
-int do_mkdirat(int dfd, struct filename *name, umode_t mode)
+static int try_mkdirat(int dfd, struct filename *name, umode_t mode,
+ unsigned int lookup_flags)
{
struct dentry *dentry;
struct path path;
int error;
- unsigned int lookup_flags = LOOKUP_DIRECTORY;
-retry:
dentry = __filename_create(dfd, name, &path, lookup_flags);
- error = PTR_ERR(dentry);
if (IS_ERR(dentry))
- goto out;
+ return PTR_ERR(dentry);
if (!IS_POSIXACL(path.dentry->d_inode))
mode &= ~current_umask();
@@ -3873,11 +3871,18 @@ int do_mkdirat(int dfd, struct filename *name, umode_t mode)
mode);
}
done_path_create(&path, dentry);
-out:
- if (unlikely(retry_estale(error, lookup_flags))) {
- lookup_flags |= LOOKUP_REVAL;
- goto retry;
- }
+
+ return error;
+}
+
+int do_mkdirat(int dfd, struct filename *name, umode_t mode)
+{
+ int error;
+
+ error = try_mkdirat(dfd, name, mode, 0);
+ if (unlikely(retry_estale(error, 0)))
+ error = try_mkdirat(dfd, name, mode, LOOKUP_REVAL);
+
putname(name);
return error;
}
--
2.30.2
next prev parent reply other threads:[~2021-07-15 10:45 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-15 10:45 [PATCH v2 00/14] namei: clean up retry logic in various do_* functions Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 01/14] namei: prepare do_rmdir for refactoring Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 02/14] namei: clean up do_rmdir retry logic Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 03/14] namei: prepare do_unlinkat for refactoring Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 04/14] namei: clean up do_unlinkat retry logic Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 05/14] namei: prepare do_mkdirat for refactoring Dmitry Kadashev
2021-07-15 10:45 ` Dmitry Kadashev [this message]
2021-07-15 10:45 ` [PATCH v2 07/14] namei: prepare do_mknodat " Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 08/14] namei: clean up do_mknodat retry logic Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 09/14] namei: prepare do_symlinkat for refactoring Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 10/14] namei: clean up do_symlinkat retry logic Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 11/14] namei: prepare do_linkat for refactoring Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 12/14] namei: clean up do_linkat retry logic Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 13/14] namei: prepare do_renameat2 for refactoring Dmitry Kadashev
2021-07-15 10:45 ` [PATCH v2 14/14] namei: clean up do_renameat2 retry logic Dmitry Kadashev
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