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From: Jeff Layton <jlayton@redhat.com>
To: viro@zeniv.linux.org.uk
Cc: linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org,
	linux-kernel@vger.kernel.org, michael.brantley@deshaw.com,
	hch@infradead.org, miklos@szeredi.hu, pstaubach@exagrid.com
Subject: [PATCH v8 02/32] vfs: make fstatat retry on ESTALE errors from getattr call
Date: Sat, 27 Oct 2012 08:33:09 -0400	[thread overview]
Message-ID: <1351341219-17837-3-git-send-email-jlayton@redhat.com> (raw)
In-Reply-To: <1351341219-17837-1-git-send-email-jlayton@redhat.com>

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 fs/stat.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/fs/stat.c b/fs/stat.c
index eae4946..c97a17e 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -74,7 +74,8 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
 {
 	struct path path;
 	int error = -EINVAL;
-	int lookup_flags = 0;
+	unsigned int try = 0;
+	unsigned int lookup_flags = 0;
 
 	if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
 		      AT_EMPTY_PATH)) != 0)
@@ -85,12 +86,15 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
 	if (flag & AT_EMPTY_PATH)
 		lookup_flags |= LOOKUP_EMPTY;
 
-	error = user_path_at(dfd, filename, lookup_flags, &path);
-	if (error)
-		goto out;
+	do {
+		error = user_path_at(dfd, filename, lookup_flags, &path);
+		if (error)
+			break;
 
-	error = vfs_getattr(path.mnt, path.dentry, stat);
-	path_put(&path);
+		error = vfs_getattr(path.mnt, path.dentry, stat);
+		path_put(&path);
+		lookup_flags |= LOOKUP_REVAL;
+	} while (retry_estale(error, try++));
 out:
 	return error;
 }
-- 
1.7.11.7


  parent reply	other threads:[~2012-10-27 12:33 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-27 12:33 [PATCH v8 00/32] vfs: add the ability to retry lookup and operation to most path-based syscalls Jeff Layton
2012-10-27 12:33 ` [PATCH v8 01/32] vfs: add a retry_estale helper function to handle retries on ESTALE Jeff Layton
2012-10-27 12:33 ` Jeff Layton [this message]
2012-10-27 12:33 ` [PATCH v8 03/32] vfs: fix readlinkat to retry " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 04/32] vfs: add new "reval" argument to kern_path_create and user_path_create Jeff Layton
2012-10-27 12:33 ` [PATCH v8 05/32] vfs: fix mknodat to retry on ESTALE errors Jeff Layton
2012-10-27 12:33 ` [PATCH v8 06/32] vfs: fix mkdir " Jeff Layton
2012-10-27 12:33   ` Jeff Layton
2012-10-27 12:33 ` [PATCH v8 07/32] vfs: fix symlinkat " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 08/32] vfs: fix linkat " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 09/32] vfs: add a reval argument to user_path_parent Jeff Layton
2012-10-27 12:33 ` [PATCH v8 10/32] vfs: make rmdir retry on ESTALE errors Jeff Layton
2012-10-27 12:33   ` Jeff Layton
2012-10-27 12:33 ` [PATCH v8 11/32] vfs: make do_unlinkat " Jeff Layton
2012-10-30 16:14   ` J. Bruce Fields
2012-10-30 16:14     ` J. Bruce Fields
2012-10-30 16:33     ` Jeff Layton
2012-10-30 16:33       ` Jeff Layton
2012-10-30 19:28       ` J. Bruce Fields
2012-10-30 19:28         ` J. Bruce Fields
2012-10-30 19:45         ` Jeff Layton
2012-10-30 19:45           ` Jeff Layton
2012-10-27 12:33 ` [PATCH v8 12/32] vfs: fix renameat to " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 13/32] vfs: have do_sys_truncate retry once on an ESTALE error Jeff Layton
2012-10-27 12:33 ` [PATCH v8 14/32] vfs: have faccessat " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 15/32] vfs: have chdir retry lookup and call once on " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 16/32] vfs: make chroot retry " Jeff Layton
2012-10-27 12:33   ` Jeff Layton
2012-10-27 12:33 ` [PATCH v8 17/32] vfs: make fchmodat retry once on ESTALE errors Jeff Layton
2012-10-27 12:33 ` [PATCH v8 18/32] vfs: make fchownat " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 19/32] vfs: fix user_statfs to " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 20/32] vfs: allow utimensat() calls to retry once on an ESTALE error Jeff Layton
2012-10-27 12:33 ` [PATCH v8 21/32] vfs: allow setxattr to retry once on ESTALE errors Jeff Layton
2012-10-27 12:33   ` Jeff Layton
2012-10-27 12:33 ` [PATCH v8 22/32] vfs: allow lsetxattr() " Jeff Layton
2012-10-27 12:33   ` Jeff Layton
2012-10-27 12:33 ` [PATCH v8 23/32] vfs: make getxattr retry once on an ESTALE error Jeff Layton
2012-10-27 12:33 ` [PATCH v8 24/32] vfs: make lgetxattr retry once on ESTALE Jeff Layton
2012-10-27 12:33 ` [PATCH v8 25/32] vfs: make listxattr retry once on ESTALE error Jeff Layton
2012-10-27 12:33 ` [PATCH v8 26/32] vfs: make llistxattr " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 27/32] vfs: make removexattr retry once on ESTALE Jeff Layton
2012-10-27 12:33 ` [PATCH v8 28/32] vfs: make lremovexattr retry once on ESTALE error Jeff Layton
2012-10-27 12:33 ` [PATCH v8 29/32] vfs: convert do_filp_open to use retry_estale helper Jeff Layton
2012-10-27 12:33 ` [PATCH v8 30/32] vfs: convert do_file_open_root " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 31/32] vfs: convert filename_lookup " Jeff Layton
2012-10-27 12:33 ` [PATCH v8 32/32] vfs: make number of ESTALE retries tunable Jeff Layton
2012-10-27 12:33   ` Jeff Layton

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