All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	linux-api@vger.kernel.org, David Howells <dhowells@redhat.com>,
	Theodore Ts'o <tytso@mit.edu>, Jaegeuk Kim <jaegeuk@kernel.org>,
	Victor Hsieh <victorhsieh@google.com>
Subject: [PATCH 4/4] docs: fs-verity: mention statx() support
Date: Tue, 29 Oct 2019 13:41:41 -0700	[thread overview]
Message-ID: <20191029204141.145309-5-ebiggers@kernel.org> (raw)
In-Reply-To: <20191029204141.145309-1-ebiggers@kernel.org>

From: Eric Biggers <ebiggers@google.com>

Document that the statx() system call can now be used to check whether a
file is a verity file.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 Documentation/filesystems/fsverity.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/filesystems/fsverity.rst b/Documentation/filesystems/fsverity.rst
index 42a0b6dd9e0b68..3355377a24398d 100644
--- a/Documentation/filesystems/fsverity.rst
+++ b/Documentation/filesystems/fsverity.rst
@@ -226,6 +226,14 @@ To do so, check for FS_VERITY_FL (0x00100000) in the returned flags.
 The verity flag is not settable via FS_IOC_SETFLAGS.  You must use
 FS_IOC_ENABLE_VERITY instead, since parameters must be provided.
 
+statx
+-----
+
+Since Linux v5.5, the statx() system call sets STATX_ATTR_VERITY if
+the file has fs-verity enabled.  This can perform better than
+FS_IOC_GETFLAGS and FS_IOC_MEASURE_VERITY because it doesn't require
+opening the file, and opening verity files can be expensive.
+
 Accessing verity files
 ======================
 
-- 
2.24.0.rc1.363.gb1bccd3e3d-goog


WARNING: multiple messages have this Message-ID (diff)
From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: Theodore Ts'o <tytso@mit.edu>,
	linux-api@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	David Howells <dhowells@redhat.com>,
	linux-fsdevel@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
	linux-ext4@vger.kernel.org, Victor Hsieh <victorhsieh@google.com>
Subject: [PATCH 4/4] docs: fs-verity: mention statx() support
Date: Tue, 29 Oct 2019 13:41:41 -0700	[thread overview]
Message-ID: <20191029204141.145309-5-ebiggers@kernel.org> (raw)
In-Reply-To: <20191029204141.145309-1-ebiggers@kernel.org>

From: Eric Biggers <ebiggers@google.com>

Document that the statx() system call can now be used to check whether a
file is a verity file.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 Documentation/filesystems/fsverity.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/filesystems/fsverity.rst b/Documentation/filesystems/fsverity.rst
index 42a0b6dd9e0b68..3355377a24398d 100644
--- a/Documentation/filesystems/fsverity.rst
+++ b/Documentation/filesystems/fsverity.rst
@@ -226,6 +226,14 @@ To do so, check for FS_VERITY_FL (0x00100000) in the returned flags.
 The verity flag is not settable via FS_IOC_SETFLAGS.  You must use
 FS_IOC_ENABLE_VERITY instead, since parameters must be provided.
 
+statx
+-----
+
+Since Linux v5.5, the statx() system call sets STATX_ATTR_VERITY if
+the file has fs-verity enabled.  This can perform better than
+FS_IOC_GETFLAGS and FS_IOC_MEASURE_VERITY because it doesn't require
+opening the file, and opening verity files can be expensive.
+
 Accessing verity files
 ======================
 
-- 
2.24.0.rc1.363.gb1bccd3e3d-goog

WARNING: multiple messages have this Message-ID (diff)
From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: Theodore Ts'o <tytso@mit.edu>,
	linux-api@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	David Howells <dhowells@redhat.com>,
	linux-fsdevel@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
	linux-ext4@vger.kernel.org, Victor Hsieh <victorhsieh@google.com>
Subject: [f2fs-dev] [PATCH 4/4] docs: fs-verity: mention statx() support
Date: Tue, 29 Oct 2019 13:41:41 -0700	[thread overview]
Message-ID: <20191029204141.145309-5-ebiggers@kernel.org> (raw)
In-Reply-To: <20191029204141.145309-1-ebiggers@kernel.org>

From: Eric Biggers <ebiggers@google.com>

Document that the statx() system call can now be used to check whether a
file is a verity file.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 Documentation/filesystems/fsverity.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/filesystems/fsverity.rst b/Documentation/filesystems/fsverity.rst
index 42a0b6dd9e0b68..3355377a24398d 100644
--- a/Documentation/filesystems/fsverity.rst
+++ b/Documentation/filesystems/fsverity.rst
@@ -226,6 +226,14 @@ To do so, check for FS_VERITY_FL (0x00100000) in the returned flags.
 The verity flag is not settable via FS_IOC_SETFLAGS.  You must use
 FS_IOC_ENABLE_VERITY instead, since parameters must be provided.
 
+statx
+-----
+
+Since Linux v5.5, the statx() system call sets STATX_ATTR_VERITY if
+the file has fs-verity enabled.  This can perform better than
+FS_IOC_GETFLAGS and FS_IOC_MEASURE_VERITY because it doesn't require
+opening the file, and opening verity files can be expensive.
+
 Accessing verity files
 ======================
 
-- 
2.24.0.rc1.363.gb1bccd3e3d-goog



_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

  parent reply	other threads:[~2019-10-29 20:43 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-29 20:41 [PATCH 0/4] statx: expose the fs-verity bit Eric Biggers
2019-10-29 20:41 ` [f2fs-dev] " Eric Biggers
2019-10-29 20:41 ` Eric Biggers
2019-10-29 20:41 ` [PATCH 1/4] statx: define STATX_ATTR_VERITY Eric Biggers
2019-10-29 20:41   ` [f2fs-dev] " Eric Biggers
2019-10-29 20:41   ` Eric Biggers
2019-10-30 18:26   ` Andreas Dilger
2019-11-07  1:44   ` Darrick J. Wong
2019-11-07  1:44     ` [f2fs-dev] " Darrick J. Wong
2019-11-07  1:44     ` Darrick J. Wong
2019-11-07  2:05     ` Andreas Dilger
2019-11-07 22:02     ` [man-pages RFC PATCH] statx.2: document STATX_ATTR_VERITY Eric Biggers
2019-11-07 22:02       ` [f2fs-dev] " Eric Biggers
2019-11-07 22:02       ` Eric Biggers
2019-11-08  0:47       ` Darrick J. Wong
2019-11-08  0:47         ` [f2fs-dev] " Darrick J. Wong
2019-11-08  0:47         ` Darrick J. Wong
2019-11-08  8:23       ` walter harms
2019-11-08 19:35         ` Eric Biggers
2019-11-08 19:35           ` [f2fs-dev] " Eric Biggers
2019-11-08 19:35           ` Eric Biggers
2019-11-09 19:34           ` walter harms
2019-11-13 20:31             ` Eric Biggers
2019-11-13 20:31               ` [f2fs-dev] " Eric Biggers
2019-11-13 20:31               ` Eric Biggers
2019-11-07 22:12     ` [PATCH 1/4] statx: define STATX_ATTR_VERITY Eric Biggers
2019-11-07 22:12       ` [f2fs-dev] " Eric Biggers
2019-11-07 22:12       ` Eric Biggers
2019-10-29 20:41 ` [PATCH 2/4] ext4: support STATX_ATTR_VERITY Eric Biggers
2019-10-29 20:41   ` [f2fs-dev] " Eric Biggers
2019-10-29 20:41   ` Eric Biggers
2019-10-30 18:27   ` Andreas Dilger
2019-10-29 20:41 ` [PATCH 3/4] f2fs: " Eric Biggers
2019-10-29 20:41   ` [f2fs-dev] " Eric Biggers
2019-10-29 20:41   ` Eric Biggers
2019-10-29 20:41 ` Eric Biggers [this message]
2019-10-29 20:41   ` [f2fs-dev] [PATCH 4/4] docs: fs-verity: mention statx() support Eric Biggers
2019-10-29 20:41   ` Eric Biggers
2019-11-06 21:57 ` [PATCH 0/4] statx: expose the fs-verity bit Eric Biggers
2019-11-06 21:57   ` [f2fs-dev] " Eric Biggers
2019-11-06 21:57   ` Eric Biggers
2019-11-13 20:20 ` Eric Biggers
2019-11-13 20:20   ` [f2fs-dev] " Eric Biggers
2019-11-13 20:20   ` Eric Biggers

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=20191029204141.145309-5-ebiggers@kernel.org \
    --to=ebiggers@kernel.org \
    --cc=dhowells@redhat.com \
    --cc=jaegeuk@kernel.org \
    --cc=linux-api@vger.kernel.org \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-f2fs-devel@lists.sourceforge.net \
    --cc=linux-fscrypt@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=tytso@mit.edu \
    --cc=victorhsieh@google.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.