All of lore.kernel.org
 help / color / mirror / Atom feed
From: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: arnd-r2nGTMty4D4@public.gmane.org
Cc: linux-afs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 12/12] fsinfo: CIFS: Return information through the filesystem info syscall
Date: Fri, 20 Nov 2015 14:56:51 +0000	[thread overview]
Message-ID: <20151120145651.18930.93196.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <20151120145422.18930.72662.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>

Return CIFS filesystem information through the filesystem info retrieval
system call.  This includes the following:

 (1) information about the capacity and resolution of the inode timestamps;

 (2) information about the supported IOC flags;

and unless AT_NO_ATTR_SYNC is specified:

 (3) the statfs information retrieved from the server.

We could also return the server and/or domain name.

[NOTE: THIS PATCH IS UNTESTED!]

Signed-off-by: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---

 fs/cifs/cifsfs.c       |   25 +++++++++++++++++++++++++
 fs/cifs/netmisc.c      |    4 ----
 fs/ntfs/time.h         |    2 --
 include/linux/time64.h |    2 ++
 4 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e739950ca084..213831972164 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -207,6 +207,30 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	return 0;
 }
 
+/*
+ * Read filesystem information.
+ */
+static int cifs_get_fsinfo(struct dentry *dentry, struct fsinfo *f,
+			   unsigned flags)
+{
+	f->f_namelen = PATH_MAX;
+
+	/* Times are signed 64-bit values with a granularity of 100ns
+	 * with a zero point of 1st Jan 1601.
+	 */
+	f->f_min_time = S64_MIN / 10000000 - NTFS_TIME_OFFSET;
+	f->f_max_time = S64_MAX / 10000000 - NTFS_TIME_OFFSET;
+	f->f_atime_gran_exponent = -7;
+	f->f_btime_gran_exponent = -7;
+	f->f_ctime_gran_exponent = -7;
+	f->f_mtime_gran_exponent = -7;
+
+	f->f_supported_ioc_flags =
+		FS_IMMUTABLE_FL | FS_COMPR_FL | FS_HIDDEN_FL |
+		FS_SYSTEM_FL | FS_ARCHIVE_FL;
+	return 0;
+}
+
 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
@@ -571,6 +595,7 @@ static int cifs_drop_inode(struct inode *inode)
 
 static const struct super_operations cifs_super_ops = {
 	.statfs = cifs_statfs,
+	.get_fsinfo	= cifs_get_fsinfo,
 	.alloc_inode = cifs_alloc_inode,
 	.destroy_inode = cifs_destroy_inode,
 	.drop_inode	= cifs_drop_inode,
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index abae6dd2c6b9..74fdbd8d824d 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -910,10 +910,6 @@ smbCalcSize(void *buf)
 		2 /* size of the bcc field */ + get_bcc(ptr));
 }
 
-/* The following are taken from fs/ntfs/util.c */
-
-#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
-
 /*
  * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
  * into Unix UTC (based 1970-01-01, in seconds).
diff --git a/fs/ntfs/time.h b/fs/ntfs/time.h
index 01233989d5d1..7b546d0615ca 100644
--- a/fs/ntfs/time.h
+++ b/fs/ntfs/time.h
@@ -27,8 +27,6 @@
 
 #include "endian.h"
 
-#define NTFS_TIME_OFFSET ((s64)(369 * 365 + 89) * 24 * 3600 * 10000000)
-
 /**
  * utc2ntfs - convert Linux UTC time to NTFS time
  * @ts:		Linux UTC time to convert to NTFS time
diff --git a/include/linux/time64.h b/include/linux/time64.h
index 367d5af899e8..a12f6384febf 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -6,6 +6,8 @@
 
 typedef __s64 time64_t;
 
+#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
+
 /*
  * This wants to go into uapi/linux/time.h once we agreed about the
  * userspace interfaces.

--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

WARNING: multiple messages have this Message-ID
From: David Howells <dhowells@redhat.com>
To: arnd@arndb.de
Cc: linux-afs@vger.kernel.org, linux-nfs@vger.kernel.org,
	linux-cifs@vger.kernel.org, samba-technical@lists.samba.org,
	linux-kernel@vger.kernel.org, dhowells@redhat.com,
	linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org
Subject: [PATCH 12/12] fsinfo: CIFS: Return information through the filesystem info syscall
Date: Fri, 20 Nov 2015 14:56:51 +0000	[thread overview]
Message-ID: <20151120145651.18930.93196.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <20151120145422.18930.72662.stgit@warthog.procyon.org.uk>

Return CIFS filesystem information through the filesystem info retrieval
system call.  This includes the following:

 (1) information about the capacity and resolution of the inode timestamps;

 (2) information about the supported IOC flags;

and unless AT_NO_ATTR_SYNC is specified:

 (3) the statfs information retrieved from the server.

We could also return the server and/or domain name.

[NOTE: THIS PATCH IS UNTESTED!]

Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/cifs/cifsfs.c       |   25 +++++++++++++++++++++++++
 fs/cifs/netmisc.c      |    4 ----
 fs/ntfs/time.h         |    2 --
 include/linux/time64.h |    2 ++
 4 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e739950ca084..213831972164 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -207,6 +207,30 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	return 0;
 }
 
+/*
+ * Read filesystem information.
+ */
+static int cifs_get_fsinfo(struct dentry *dentry, struct fsinfo *f,
+			   unsigned flags)
+{
+	f->f_namelen = PATH_MAX;
+
+	/* Times are signed 64-bit values with a granularity of 100ns
+	 * with a zero point of 1st Jan 1601.
+	 */
+	f->f_min_time = S64_MIN / 10000000 - NTFS_TIME_OFFSET;
+	f->f_max_time = S64_MAX / 10000000 - NTFS_TIME_OFFSET;
+	f->f_atime_gran_exponent = -7;
+	f->f_btime_gran_exponent = -7;
+	f->f_ctime_gran_exponent = -7;
+	f->f_mtime_gran_exponent = -7;
+
+	f->f_supported_ioc_flags =
+		FS_IMMUTABLE_FL | FS_COMPR_FL | FS_HIDDEN_FL |
+		FS_SYSTEM_FL | FS_ARCHIVE_FL;
+	return 0;
+}
+
 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
@@ -571,6 +595,7 @@ static int cifs_drop_inode(struct inode *inode)
 
 static const struct super_operations cifs_super_ops = {
 	.statfs = cifs_statfs,
+	.get_fsinfo	= cifs_get_fsinfo,
 	.alloc_inode = cifs_alloc_inode,
 	.destroy_inode = cifs_destroy_inode,
 	.drop_inode	= cifs_drop_inode,
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index abae6dd2c6b9..74fdbd8d824d 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -910,10 +910,6 @@ smbCalcSize(void *buf)
 		2 /* size of the bcc field */ + get_bcc(ptr));
 }
 
-/* The following are taken from fs/ntfs/util.c */
-
-#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
-
 /*
  * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
  * into Unix UTC (based 1970-01-01, in seconds).
diff --git a/fs/ntfs/time.h b/fs/ntfs/time.h
index 01233989d5d1..7b546d0615ca 100644
--- a/fs/ntfs/time.h
+++ b/fs/ntfs/time.h
@@ -27,8 +27,6 @@
 
 #include "endian.h"
 
-#define NTFS_TIME_OFFSET ((s64)(369 * 365 + 89) * 24 * 3600 * 10000000)
-
 /**
  * utc2ntfs - convert Linux UTC time to NTFS time
  * @ts:		Linux UTC time to convert to NTFS time
diff --git a/include/linux/time64.h b/include/linux/time64.h
index 367d5af899e8..a12f6384febf 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -6,6 +6,8 @@
 
 typedef __s64 time64_t;
 
+#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
+
 /*
  * This wants to go into uapi/linux/time.h once we agreed about the
  * userspace interfaces.


  parent reply	other threads:[~2015-11-20 14:56 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-20 14:54 [RFC][PATCH 00/12] Enhanced file stat system call David Howells
2015-11-20 14:54 ` [PATCH 01/12] Ext4: Fix extended timestamp encoding and decoding David Howells
     [not found]   ` <20151120145434.18930.89755.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2015-11-24 17:37     ` Andreas Dilger
2015-11-24 17:37       ` Andreas Dilger
2015-11-24 19:36   ` Theodore Ts'o
     [not found]     ` <20151124193646.GA3482-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2015-11-24 20:10       ` Arnd Bergmann
2015-11-24 20:10         ` Arnd Bergmann
2015-11-29  2:45         ` Theodore Ts'o
2015-11-29  2:45           ` Theodore Ts'o
     [not found]           ` <20151129024555.GA31968-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2015-11-29 21:30             ` Arnd Bergmann
2015-11-29 21:30               ` Arnd Bergmann
2015-11-30 14:16               ` Theodore Ts'o
     [not found]                 ` <20151130141605.GA4316-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2015-11-30 14:37                   ` Arnd Bergmann
2015-11-30 14:37                     ` Arnd Bergmann
2015-11-30 14:46                 ` Elmar Stellnberger
2015-11-26 15:28       ` David Howells
2015-11-26 15:28         ` David Howells
2015-11-20 14:54 ` [PATCH 02/12] statx: Provide IOC flags for Windows fs attributes David Howells
     [not found]   ` <20151120145447.18930.5308.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2015-11-24 19:52     ` Theodore Ts'o
2015-11-24 19:52       ` Theodore Ts'o
2015-11-26 15:35   ` David Howells
     [not found]   ` <7976.1448552129-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2015-11-26 16:01     ` David Howells
2015-11-26 16:01       ` David Howells
2015-11-26 22:10     ` Andreas Dilger
2015-11-26 22:10       ` Andreas Dilger
2015-11-20 14:54 ` [PATCH 03/12] statx: Add a system call to make enhanced file info available David Howells
     [not found]   ` <20151120145457.18930.79678.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2015-11-24 20:21     ` Dave Chinner
2015-11-24 20:21       ` Dave Chinner
2015-12-04 12:06     ` Pavel Machek
2015-12-04 12:06       ` Pavel Machek
2015-12-21 23:21   ` David Howells
2015-11-20 14:55 ` [PATCH 04/12] statx: AFS: Return enhanced file attributes David Howells
2015-11-20 14:55 ` [PATCH 05/12] statx: Ext4: " David Howells
2015-11-20 14:55 ` [PATCH 06/12] statx: NFS: " David Howells
2015-11-20 14:55 ` [PATCH 07/12] statx: CIFS: Return enhanced attributes David Howells
2015-11-24 17:33   ` Steve French
2015-11-24 17:34   ` Steve French
2015-11-24 17:34     ` Steve French
2015-11-20 14:56 ` [PATCH 08/12] fsinfo: Add a system call to make enhanced filesystem info available David Howells
2015-11-20 14:56 ` [PATCH 09/12] fsinfo: Ext4: Return information through the filesystem info syscall David Howells
2015-11-20 14:56 ` [PATCH 10/12] fsinfo: AFS: " David Howells
2015-11-20 14:56 ` [PATCH 11/12] fsinfo: NFS: " David Howells
     [not found] ` <20151120145422.18930.72662.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2015-11-20 14:56   ` David Howells [this message]
2015-11-20 14:56     ` [PATCH 12/12] fsinfo: CIFS: " David Howells
2015-11-24  8:11   ` [RFC][PATCH 00/12] Enhanced file stat system call Christoph Hellwig
2015-11-24  8:11     ` Christoph Hellwig
2015-11-20 16:19 ` Martin Steigerwald
2015-11-24  8:13   ` Christoph Hellwig
2015-11-24  8:48     ` Martin Steigerwald
2015-11-24  8:50       ` Christoph Hellwig
2015-11-20 16:28 ` David Howells
2015-11-20 16:28   ` David Howells
2015-11-20 16:35   ` Martin Steigerwald
     [not found]   ` <4495.1448036915-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2015-11-25 17:51     ` J. Bruce Fields
2015-11-25 17:51       ` J. Bruce Fields
     [not found]       ` <20151125175153.GA30335-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2015-11-25 19:30         ` Andreas Dilger
2015-11-25 19:30           ` Andreas Dilger
2015-11-20 16:50 ` Casey Schaufler
     [not found]   ` <564F4F4E.8060603-iSGtlc1asvQWG2LlvL+J4A@public.gmane.org>
2015-11-24  8:15     ` Christoph Hellwig
2015-11-24  8:15       ` Christoph Hellwig
2015-11-24 14:43       ` Casey Schaufler
2015-11-24 16:28   ` Andreas Dilger
2015-11-26 15:19 ` David Howells
2015-11-26 22:06   ` Andreas Dilger

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=20151120145651.18930.93196.stgit@warthog.procyon.org.uk \
    --to=dhowells-h+wxahxf7alqt0dzr+alfa@public.gmane.org \
    --cc=arnd-r2nGTMty4D4@public.gmane.org \
    --cc=linux-afs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org \
    --subject='Re: [PATCH 12/12] fsinfo: CIFS: Return information through the filesystem info syscall' \
    /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

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.