* [PATCH 1/3] fs: XFS_IOC_FS[SG]SETXATTR to FS_IOC_FS[SG]ETXATTR promotion
2016-01-04 5:54 [PATCH 0/3] fs: FS_IOC_FS[GS]ETXATTR promotion Dave Chinner
@ 2016-01-04 5:54 ` Dave Chinner
2016-01-16 21:22 ` Theodore Ts'o
2016-01-04 5:54 ` [PATCH 2/3] xfs: use FS_XFLAG definitions directly Dave Chinner
2016-01-04 5:54 ` [PATCH 3/3] xfs: introduce per-inode DAX enablement Dave Chinner
2 siblings, 1 reply; 12+ messages in thread
From: Dave Chinner @ 2016-01-04 5:54 UTC (permalink / raw)
To: xfs; +Cc: linux-fsdevel, ext4
From: Dave Chinner <dchinner@redhat.com>
Hoist the ioctl definitions for the XFS_IOC_FS[SG]SETXATTR API from
fs/xfs/libxfs/xfs_fs.h to include/uapi/linux/fs.h so that the ioctls
can be used by all filesystems, not just XFS. This enables
(initially) ext4 to use the ioctl to set project IDs on inodes.
Based-on-patch-from: Li Xi <lixi@ddn.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/libxfs/xfs_fs.h | 51 +++++++++++++++++--------------------------------
include/uapi/linux/fs.h | 32 +++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+), 33 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index b2b73a9..dd29d0a 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -36,38 +36,23 @@ struct dioattr {
#endif
/*
- * Structure for XFS_IOC_FSGETXATTR[A] and XFS_IOC_FSSETXATTR.
+ * Flags for the bs_xflags/fsx_xflags field in FS_IOC_FS[GS]ETXATTR[A]
*/
-#ifndef HAVE_FSXATTR
-struct fsxattr {
- __u32 fsx_xflags; /* xflags field value (get/set) */
- __u32 fsx_extsize; /* extsize field value (get/set)*/
- __u32 fsx_nextents; /* nextents field value (get) */
- __u32 fsx_projid; /* project identifier (get/set) */
- unsigned char fsx_pad[12];
-};
-#endif
-
-/*
- * Flags for the bs_xflags/fsx_xflags field
- * There should be a one-to-one correspondence between these flags and the
- * XFS_DIFLAG_s.
- */
-#define XFS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
-#define XFS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
-#define XFS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
-#define XFS_XFLAG_APPEND 0x00000010 /* all writes append */
-#define XFS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
-#define XFS_XFLAG_NOATIME 0x00000040 /* do not update access time */
-#define XFS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
-#define XFS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
-#define XFS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
-#define XFS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
-#define XFS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
-#define XFS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
-#define XFS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
-#define XFS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
-#define XFS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
+#define XFS_XFLAG_REALTIME FS_XFLAG_REALTIME
+#define XFS_XFLAG_PREALLOC FS_XFLAG_PREALLOC
+#define XFS_XFLAG_IMMUTABLE FS_XFLAG_IMMUTABLE
+#define XFS_XFLAG_APPEND FS_XFLAG_APPEND
+#define XFS_XFLAG_SYNC FS_XFLAG_SYNC
+#define XFS_XFLAG_NOATIME FS_XFLAG_NOATIME
+#define XFS_XFLAG_NODUMP FS_XFLAG_NODUMP
+#define XFS_XFLAG_RTINHERIT FS_XFLAG_RTINHERIT
+#define XFS_XFLAG_PROJINHERIT FS_XFLAG_PROJINHERIT
+#define XFS_XFLAG_NOSYMLINKS FS_XFLAG_NOSYMLINKS
+#define XFS_XFLAG_EXTSIZE FS_XFLAG_EXTSIZE
+#define XFS_XFLAG_EXTSZINHERIT FS_XFLAG_EXTSZINHERIT
+#define XFS_XFLAG_NODEFRAG FS_XFLAG_NODEFRAG
+#define XFS_XFLAG_FILESTREAM FS_XFLAG_FILESTREAM
+#define XFS_XFLAG_HASATTR FS_XFLAG_HASATTR
/*
* Structure for XFS_IOC_GETBMAP.
@@ -514,8 +499,8 @@ typedef struct xfs_swapext
#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
#define XFS_IOC_DIOINFO _IOR ('X', 30, struct dioattr)
-#define XFS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
-#define XFS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
+#define XFS_IOC_FSGETXATTR FS_IOC_FSGETXATTR
+#define XFS_IOC_FSSETXATTR FS_IOC_FSSETXATTR
#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
#define XFS_IOC_GETBMAP _IOWR('X', 38, struct getbmap)
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index f15d980..df175dd 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -110,6 +110,36 @@ struct inodes_stat_t {
#define MS_MGC_VAL 0xC0ED0000
#define MS_MGC_MSK 0xffff0000
+/*
+ * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
+ */
+struct fsxattr {
+ __u32 fsx_xflags; /* xflags field value (get/set) */
+ __u32 fsx_extsize; /* extsize field value (get/set)*/
+ __u32 fsx_nextents; /* nextents field value (get) */
+ __u32 fsx_projid; /* project identifier (get/set) */
+ unsigned char fsx_pad[12];
+};
+
+/*
+ * Flags for the fsx_xflags field
+ */
+#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
+#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
+#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
+#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
+#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
+#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
+#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
+#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
+#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
+#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
+#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
+#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
+#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
+#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
+#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
+
/* the read-only stuff doesn't really belong here, but any other place is
probably as bad and I don't want to create yet another include file. */
@@ -169,6 +199,8 @@ struct inodes_stat_t {
#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
#define FS_IOC32_GETVERSION _IOR('v', 1, int)
#define FS_IOC32_SETVERSION _IOW('v', 2, int)
+#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
+#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
/*
* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
--
2.5.0
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 2/3] xfs: use FS_XFLAG definitions directly
2016-01-04 5:54 [PATCH 0/3] fs: FS_IOC_FS[GS]ETXATTR promotion Dave Chinner
2016-01-04 5:54 ` [PATCH 1/3] fs: XFS_IOC_FS[SG]SETXATTR to FS_IOC_FS[SG]ETXATTR promotion Dave Chinner
@ 2016-01-04 5:54 ` Dave Chinner
2016-01-16 21:22 ` Theodore Ts'o
2016-01-04 5:54 ` [PATCH 3/3] xfs: introduce per-inode DAX enablement Dave Chinner
2 siblings, 1 reply; 12+ messages in thread
From: Dave Chinner @ 2016-01-04 5:54 UTC (permalink / raw)
To: xfs; +Cc: linux-fsdevel, ext4
From: Dave Chinner <dchinner@redhat.com>
Now that the ioctls have been hoisted up to the VFS level, use
the VFs definitions directly and remove the XFS specific definitions
completely. Userspace is going to have to handle the change of this
interface separately, so removing the definitions from xfs_fs.h is
not an issue here at all.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/libxfs/xfs_format.h | 2 --
fs/xfs/libxfs/xfs_fs.h | 19 ------------
fs/xfs/xfs_inode.c | 32 ++++++++++----------
fs/xfs/xfs_ioctl.c | 74 +++++++++++++++++++++++-----------------------
4 files changed, 53 insertions(+), 74 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 8774498..f28eeab 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -984,8 +984,6 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
/*
* Values for di_flags
- * There should be a one-to-one correspondence between these flags and the
- * XFS_XFLAG_s.
*/
#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index dd29d0a..fffe3d0 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -36,25 +36,6 @@ struct dioattr {
#endif
/*
- * Flags for the bs_xflags/fsx_xflags field in FS_IOC_FS[GS]ETXATTR[A]
- */
-#define XFS_XFLAG_REALTIME FS_XFLAG_REALTIME
-#define XFS_XFLAG_PREALLOC FS_XFLAG_PREALLOC
-#define XFS_XFLAG_IMMUTABLE FS_XFLAG_IMMUTABLE
-#define XFS_XFLAG_APPEND FS_XFLAG_APPEND
-#define XFS_XFLAG_SYNC FS_XFLAG_SYNC
-#define XFS_XFLAG_NOATIME FS_XFLAG_NOATIME
-#define XFS_XFLAG_NODUMP FS_XFLAG_NODUMP
-#define XFS_XFLAG_RTINHERIT FS_XFLAG_RTINHERIT
-#define XFS_XFLAG_PROJINHERIT FS_XFLAG_PROJINHERIT
-#define XFS_XFLAG_NOSYMLINKS FS_XFLAG_NOSYMLINKS
-#define XFS_XFLAG_EXTSIZE FS_XFLAG_EXTSIZE
-#define XFS_XFLAG_EXTSZINHERIT FS_XFLAG_EXTSZINHERIT
-#define XFS_XFLAG_NODEFRAG FS_XFLAG_NODEFRAG
-#define XFS_XFLAG_FILESTREAM FS_XFLAG_FILESTREAM
-#define XFS_XFLAG_HASATTR FS_XFLAG_HASATTR
-
-/*
* Structure for XFS_IOC_GETBMAP.
* On input, fill in bmv_offset and bmv_length of the first structure
* to indicate the area of interest in the file, and bmv_entries with
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 8ee3939..ca9ca5a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -616,33 +616,33 @@ _xfs_dic2xflags(
if (di_flags & XFS_DIFLAG_ANY) {
if (di_flags & XFS_DIFLAG_REALTIME)
- flags |= XFS_XFLAG_REALTIME;
+ flags |= FS_XFLAG_REALTIME;
if (di_flags & XFS_DIFLAG_PREALLOC)
- flags |= XFS_XFLAG_PREALLOC;
+ flags |= FS_XFLAG_PREALLOC;
if (di_flags & XFS_DIFLAG_IMMUTABLE)
- flags |= XFS_XFLAG_IMMUTABLE;
+ flags |= FS_XFLAG_IMMUTABLE;
if (di_flags & XFS_DIFLAG_APPEND)
- flags |= XFS_XFLAG_APPEND;
+ flags |= FS_XFLAG_APPEND;
if (di_flags & XFS_DIFLAG_SYNC)
- flags |= XFS_XFLAG_SYNC;
+ flags |= FS_XFLAG_SYNC;
if (di_flags & XFS_DIFLAG_NOATIME)
- flags |= XFS_XFLAG_NOATIME;
+ flags |= FS_XFLAG_NOATIME;
if (di_flags & XFS_DIFLAG_NODUMP)
- flags |= XFS_XFLAG_NODUMP;
+ flags |= FS_XFLAG_NODUMP;
if (di_flags & XFS_DIFLAG_RTINHERIT)
- flags |= XFS_XFLAG_RTINHERIT;
+ flags |= FS_XFLAG_RTINHERIT;
if (di_flags & XFS_DIFLAG_PROJINHERIT)
- flags |= XFS_XFLAG_PROJINHERIT;
+ flags |= FS_XFLAG_PROJINHERIT;
if (di_flags & XFS_DIFLAG_NOSYMLINKS)
- flags |= XFS_XFLAG_NOSYMLINKS;
+ flags |= FS_XFLAG_NOSYMLINKS;
if (di_flags & XFS_DIFLAG_EXTSIZE)
- flags |= XFS_XFLAG_EXTSIZE;
+ flags |= FS_XFLAG_EXTSIZE;
if (di_flags & XFS_DIFLAG_EXTSZINHERIT)
- flags |= XFS_XFLAG_EXTSZINHERIT;
+ flags |= FS_XFLAG_EXTSZINHERIT;
if (di_flags & XFS_DIFLAG_NODEFRAG)
- flags |= XFS_XFLAG_NODEFRAG;
+ flags |= FS_XFLAG_NODEFRAG;
if (di_flags & XFS_DIFLAG_FILESTREAM)
- flags |= XFS_XFLAG_FILESTREAM;
+ flags |= FS_XFLAG_FILESTREAM;
}
return flags;
@@ -655,7 +655,7 @@ xfs_ip2xflags(
xfs_icdinode_t *dic = &ip->i_d;
return _xfs_dic2xflags(dic->di_flags) |
- (XFS_IFORK_Q(ip) ? XFS_XFLAG_HASATTR : 0);
+ (XFS_IFORK_Q(ip) ? FS_XFLAG_HASATTR : 0);
}
uint
@@ -663,7 +663,7 @@ xfs_dic2xflags(
xfs_dinode_t *dip)
{
return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) |
- (XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0);
+ (XFS_DFORK_Q(dip) ? FS_XFLAG_HASATTR : 0);
}
/*
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index d42738d..94b35eb3 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -859,25 +859,25 @@ xfs_merge_ioc_xflags(
unsigned int xflags = start;
if (flags & FS_IMMUTABLE_FL)
- xflags |= XFS_XFLAG_IMMUTABLE;
+ xflags |= FS_XFLAG_IMMUTABLE;
else
- xflags &= ~XFS_XFLAG_IMMUTABLE;
+ xflags &= ~FS_XFLAG_IMMUTABLE;
if (flags & FS_APPEND_FL)
- xflags |= XFS_XFLAG_APPEND;
+ xflags |= FS_XFLAG_APPEND;
else
- xflags &= ~XFS_XFLAG_APPEND;
+ xflags &= ~FS_XFLAG_APPEND;
if (flags & FS_SYNC_FL)
- xflags |= XFS_XFLAG_SYNC;
+ xflags |= FS_XFLAG_SYNC;
else
- xflags &= ~XFS_XFLAG_SYNC;
+ xflags &= ~FS_XFLAG_SYNC;
if (flags & FS_NOATIME_FL)
- xflags |= XFS_XFLAG_NOATIME;
+ xflags |= FS_XFLAG_NOATIME;
else
- xflags &= ~XFS_XFLAG_NOATIME;
+ xflags &= ~FS_XFLAG_NOATIME;
if (flags & FS_NODUMP_FL)
- xflags |= XFS_XFLAG_NODUMP;
+ xflags |= FS_XFLAG_NODUMP;
else
- xflags &= ~XFS_XFLAG_NODUMP;
+ xflags &= ~FS_XFLAG_NODUMP;
return xflags;
}
@@ -948,33 +948,33 @@ xfs_set_diflags(
/* can't set PREALLOC this way, just preserve it */
di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
- if (xflags & XFS_XFLAG_IMMUTABLE)
+ if (xflags & FS_XFLAG_IMMUTABLE)
di_flags |= XFS_DIFLAG_IMMUTABLE;
- if (xflags & XFS_XFLAG_APPEND)
+ if (xflags & FS_XFLAG_APPEND)
di_flags |= XFS_DIFLAG_APPEND;
- if (xflags & XFS_XFLAG_SYNC)
+ if (xflags & FS_XFLAG_SYNC)
di_flags |= XFS_DIFLAG_SYNC;
- if (xflags & XFS_XFLAG_NOATIME)
+ if (xflags & FS_XFLAG_NOATIME)
di_flags |= XFS_DIFLAG_NOATIME;
- if (xflags & XFS_XFLAG_NODUMP)
+ if (xflags & FS_XFLAG_NODUMP)
di_flags |= XFS_DIFLAG_NODUMP;
- if (xflags & XFS_XFLAG_NODEFRAG)
+ if (xflags & FS_XFLAG_NODEFRAG)
di_flags |= XFS_DIFLAG_NODEFRAG;
- if (xflags & XFS_XFLAG_FILESTREAM)
+ if (xflags & FS_XFLAG_FILESTREAM)
di_flags |= XFS_DIFLAG_FILESTREAM;
if (S_ISDIR(ip->i_d.di_mode)) {
- if (xflags & XFS_XFLAG_RTINHERIT)
+ if (xflags & FS_XFLAG_RTINHERIT)
di_flags |= XFS_DIFLAG_RTINHERIT;
- if (xflags & XFS_XFLAG_NOSYMLINKS)
+ if (xflags & FS_XFLAG_NOSYMLINKS)
di_flags |= XFS_DIFLAG_NOSYMLINKS;
- if (xflags & XFS_XFLAG_EXTSZINHERIT)
+ if (xflags & FS_XFLAG_EXTSZINHERIT)
di_flags |= XFS_DIFLAG_EXTSZINHERIT;
- if (xflags & XFS_XFLAG_PROJINHERIT)
+ if (xflags & FS_XFLAG_PROJINHERIT)
di_flags |= XFS_DIFLAG_PROJINHERIT;
} else if (S_ISREG(ip->i_d.di_mode)) {
- if (xflags & XFS_XFLAG_REALTIME)
+ if (xflags & FS_XFLAG_REALTIME)
di_flags |= XFS_DIFLAG_REALTIME;
- if (xflags & XFS_XFLAG_EXTSIZE)
+ if (xflags & FS_XFLAG_EXTSIZE)
di_flags |= XFS_DIFLAG_EXTSIZE;
}
@@ -988,19 +988,19 @@ xfs_diflags_to_linux(
struct inode *inode = VFS_I(ip);
unsigned int xflags = xfs_ip2xflags(ip);
- if (xflags & XFS_XFLAG_IMMUTABLE)
+ if (xflags & FS_XFLAG_IMMUTABLE)
inode->i_flags |= S_IMMUTABLE;
else
inode->i_flags &= ~S_IMMUTABLE;
- if (xflags & XFS_XFLAG_APPEND)
+ if (xflags & FS_XFLAG_APPEND)
inode->i_flags |= S_APPEND;
else
inode->i_flags &= ~S_APPEND;
- if (xflags & XFS_XFLAG_SYNC)
+ if (xflags & FS_XFLAG_SYNC)
inode->i_flags |= S_SYNC;
else
inode->i_flags &= ~S_SYNC;
- if (xflags & XFS_XFLAG_NOATIME)
+ if (xflags & FS_XFLAG_NOATIME)
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
@@ -1016,11 +1016,11 @@ xfs_ioctl_setattr_xflags(
/* Can't change realtime flag if any extents are allocated. */
if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
- XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
+ XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
return -EINVAL;
/* If realtime flag is set then must have realtime device */
- if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
+ if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
(ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
return -EINVAL;
@@ -1031,7 +1031,7 @@ xfs_ioctl_setattr_xflags(
* we have appropriate permission.
*/
if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
- (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
+ (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
!capable(CAP_LINUX_IMMUTABLE))
return -EPERM;
@@ -1095,8 +1095,8 @@ out_cancel:
* extent size hint validation is somewhat cumbersome. Rules are:
*
* 1. extent size hint is only valid for directories and regular files
- * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
- * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
+ * 2. FS_XFLAG_EXTSIZE is only valid for regular files
+ * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
* 4. can only be changed on regular files if no extents are allocated
* 5. can be changed on directories at any time
* 6. extsize hint of 0 turns off hints, clears inode flags.
@@ -1112,10 +1112,10 @@ xfs_ioctl_setattr_check_extsize(
{
struct xfs_mount *mp = ip->i_mount;
- if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
+ if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
return -EINVAL;
- if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
+ if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
!S_ISDIR(ip->i_d.di_mode))
return -EINVAL;
@@ -1132,7 +1132,7 @@ xfs_ioctl_setattr_check_extsize(
return -EINVAL;
if (XFS_IS_REALTIME_INODE(ip) ||
- (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
+ (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
} else {
size = mp->m_sb.sb_blocksize;
@@ -1143,7 +1143,7 @@ xfs_ioctl_setattr_check_extsize(
if (fa->fsx_extsize % size)
return -EINVAL;
} else
- fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
+ fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
return 0;
}
@@ -1168,7 +1168,7 @@ xfs_ioctl_setattr_check_projid(
if (xfs_get_projid(ip) != fa->fsx_projid)
return -EINVAL;
- if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
+ if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
return -EINVAL;
--
2.5.0
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH 2/3] xfs: use FS_XFLAG definitions directly
2016-01-04 5:54 ` [PATCH 2/3] xfs: use FS_XFLAG definitions directly Dave Chinner
@ 2016-01-16 21:22 ` Theodore Ts'o
0 siblings, 0 replies; 12+ messages in thread
From: Theodore Ts'o @ 2016-01-16 21:22 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, ext4, xfs
On Mon, Jan 04, 2016 at 04:54:51PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> Now that the ioctls have been hoisted up to the VFS level, use
> the VFs definitions directly and remove the XFS specific definitions
> completely. Userspace is going to have to handle the change of this
> interface separately, so removing the definitions from xfs_fs.h is
> not an issue here at all.
>
> Signed-off-by: Dave Chinner <dchinner@redhat.com>
Looks good to me.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
- Ted
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-04 5:54 [PATCH 0/3] fs: FS_IOC_FS[GS]ETXATTR promotion Dave Chinner
2016-01-04 5:54 ` [PATCH 1/3] fs: XFS_IOC_FS[SG]SETXATTR to FS_IOC_FS[SG]ETXATTR promotion Dave Chinner
2016-01-04 5:54 ` [PATCH 2/3] xfs: use FS_XFLAG definitions directly Dave Chinner
@ 2016-01-04 5:54 ` Dave Chinner
2016-01-16 21:22 ` Theodore Ts'o
` (2 more replies)
2 siblings, 3 replies; 12+ messages in thread
From: Dave Chinner @ 2016-01-04 5:54 UTC (permalink / raw)
To: xfs; +Cc: linux-fsdevel, ext4
From: Dave Chinner <dchinner@redhat.com>
Rather than just being able to turn DAX on and off via a mount
option, some applications may only want to enable DAX for certain
performance critical files in a filesystem.
This patch introduces a new inode flag to enable DAX in the v3 inode
di_flags2 field. It adds support for setting and clearing flags in
the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the
S_DAX inode flag appropriately when it is seen.
When this flag is set on a directory, it acts as an "inherit flag".
That is, inodes created in the directory will automatically inherit
the on-disk inode DAX flag, enabling administrators to set up
directory heirarchies that automatically use DAX. Setting this flag
on an empty root directory will make the entire filesystem use DAX
by default.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/libxfs/xfs_format.h | 9 +++++++++
fs/xfs/xfs_inode.c | 32 +++++++++++++++++++++++---------
fs/xfs/xfs_ioctl.c | 18 +++++++++++++++++-
fs/xfs/xfs_iops.c | 4 ++--
include/uapi/linux/fs.h | 1 +
5 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index f28eeab..b4ae7ce 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -1024,6 +1024,15 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM)
/*
+ * Values for di_flags2 These start by being exposed to userspace in the upper
+ * 16 bits of the XFS_XFLAG_s range.
+ */
+#define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */
+#define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT)
+
+#define XFS_DIFLAG2_ANY (XFS_DIFLAG2_DAX)
+
+/*
* Inode number format:
* low inopblog bits - offset in block
* next agblklog bits - block number in ag
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index ca9ca5a..8929908 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -610,7 +610,9 @@ __xfs_iflock(
STATIC uint
_xfs_dic2xflags(
- __uint16_t di_flags)
+ __uint16_t di_flags,
+ uint64_t di_flags2,
+ bool has_attr)
{
uint flags = 0;
@@ -645,25 +647,32 @@ _xfs_dic2xflags(
flags |= FS_XFLAG_FILESTREAM;
}
+ if (di_flags2 & XFS_DIFLAG2_ANY) {
+ if (di_flags2 & XFS_DIFLAG2_DAX)
+ flags |= FS_XFLAG_DAX;
+ }
+
+ if (has_attr)
+ flags |= FS_XFLAG_HASATTR;
+
return flags;
}
uint
xfs_ip2xflags(
- xfs_inode_t *ip)
+ struct xfs_inode *ip)
{
- xfs_icdinode_t *dic = &ip->i_d;
+ struct xfs_icdinode *dic = &ip->i_d;
- return _xfs_dic2xflags(dic->di_flags) |
- (XFS_IFORK_Q(ip) ? FS_XFLAG_HASATTR : 0);
+ return _xfs_dic2xflags(dic->di_flags, dic->di_flags2, XFS_IFORK_Q(ip));
}
uint
xfs_dic2xflags(
- xfs_dinode_t *dip)
+ struct xfs_dinode *dip)
{
- return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) |
- (XFS_DFORK_Q(dip) ? FS_XFLAG_HASATTR : 0);
+ return _xfs_dic2xflags(be16_to_cpu(dip->di_flags),
+ be64_to_cpu(dip->di_flags2), XFS_DFORK_Q(dip));
}
/*
@@ -862,7 +871,8 @@ xfs_ialloc(
case S_IFREG:
case S_IFDIR:
if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) {
- uint di_flags = 0;
+ uint64_t di_flags2 = 0;
+ uint di_flags = 0;
if (S_ISDIR(mode)) {
if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT)
@@ -898,7 +908,11 @@ xfs_ialloc(
di_flags |= XFS_DIFLAG_NODEFRAG;
if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM)
di_flags |= XFS_DIFLAG_FILESTREAM;
+ if (pip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
+ di_flags2 |= XFS_DIFLAG2_DAX;
+
ip->i_d.di_flags |= di_flags;
+ ip->i_d.di_flags2 |= di_flags2;
}
/* FALLTHROUGH */
case S_IFLNK:
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 94b35eb3..478d04e 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -945,6 +945,7 @@ xfs_set_diflags(
unsigned int xflags)
{
unsigned int di_flags;
+ uint64_t di_flags2;
/* can't set PREALLOC this way, just preserve it */
di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
@@ -977,8 +978,18 @@ xfs_set_diflags(
if (xflags & FS_XFLAG_EXTSIZE)
di_flags |= XFS_DIFLAG_EXTSIZE;
}
-
ip->i_d.di_flags = di_flags;
+
+ /* diflags2 only valid for v3 inodes. */
+ if (ip->i_d.di_version < 3)
+ return;
+
+ di_flags2 = 0;
+ if (xflags & FS_XFLAG_DAX)
+ di_flags2 |= XFS_DIFLAG2_DAX;
+
+ ip->i_d.di_flags2 = di_flags2;
+
}
STATIC void
@@ -1004,6 +1015,11 @@ xfs_diflags_to_linux(
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
+ if (xflags & FS_XFLAG_DAX)
+ inode->i_flags |= S_DAX;
+ else
+ inode->i_flags &= ~S_DAX;
+
}
static int
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 245268a..a1b8af1 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1201,8 +1201,8 @@ xfs_diflags_to_iflags(
inode->i_flags |= S_SYNC;
if (flags & XFS_DIFLAG_NOATIME)
inode->i_flags |= S_NOATIME;
- /* XXX: Also needs an on-disk per inode flag! */
- if (ip->i_mount->m_flags & XFS_MOUNT_DAX)
+ if (ip->i_mount->m_flags & XFS_MOUNT_DAX ||
+ ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
inode->i_flags |= S_DAX;
}
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index df175dd..4cad4c8 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -138,6 +138,7 @@ struct fsxattr {
#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
+#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
/* the read-only stuff doesn't really belong here, but any other place is
--
2.5.0
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-04 5:54 ` [PATCH 3/3] xfs: introduce per-inode DAX enablement Dave Chinner
@ 2016-01-16 21:22 ` Theodore Ts'o
2016-01-21 16:37 ` Dan Williams
2016-01-22 0:45 ` Darrick J. Wong
2 siblings, 0 replies; 12+ messages in thread
From: Theodore Ts'o @ 2016-01-16 21:22 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, ext4, xfs
On Mon, Jan 04, 2016 at 04:54:52PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> Rather than just being able to turn DAX on and off via a mount
> option, some applications may only want to enable DAX for certain
> performance critical files in a filesystem.
>
> This patch introduces a new inode flag to enable DAX in the v3 inode
> di_flags2 field. It adds support for setting and clearing flags in
> the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the
> S_DAX inode flag appropriately when it is seen.
>
> When this flag is set on a directory, it acts as an "inherit flag".
> That is, inodes created in the directory will automatically inherit
> the on-disk inode DAX flag, enabling administrators to set up
> directory heirarchies that automatically use DAX. Setting this flag
> on an empty root directory will make the entire filesystem use DAX
> by default.
>
> Signed-off-by: Dave Chinner <dchinner@redhat.com>
Looks good to me.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
- Ted
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-04 5:54 ` [PATCH 3/3] xfs: introduce per-inode DAX enablement Dave Chinner
2016-01-16 21:22 ` Theodore Ts'o
@ 2016-01-21 16:37 ` Dan Williams
2016-01-21 21:58 ` Dave Chinner
2016-01-22 0:45 ` Darrick J. Wong
2 siblings, 1 reply; 12+ messages in thread
From: Dan Williams @ 2016-01-21 16:37 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, ext4, xfs
On Sun, Jan 3, 2016 at 9:54 PM, Dave Chinner <david@fromorbit.com> wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> Rather than just being able to turn DAX on and off via a mount
> option, some applications may only want to enable DAX for certain
> performance critical files in a filesystem.
>
> This patch introduces a new inode flag to enable DAX in the v3 inode
> di_flags2 field. It adds support for setting and clearing flags in
> the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the
> S_DAX inode flag appropriately when it is seen.
>
> When this flag is set on a directory, it acts as an "inherit flag".
> That is, inodes created in the directory will automatically inherit
> the on-disk inode DAX flag, enabling administrators to set up
> directory heirarchies that automatically use DAX. Setting this flag
> on an empty root directory will make the entire filesystem use DAX
> by default.
When switching from page-cache to DAX, don't we need to flush existing
page cache mappings and remap directly? Or, is the thought that
userspace needs to comprehend the presence of mixed mappings after
changing S_DAX?
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-21 16:37 ` Dan Williams
@ 2016-01-21 21:58 ` Dave Chinner
2016-01-21 22:53 ` Dan Williams
0 siblings, 1 reply; 12+ messages in thread
From: Dave Chinner @ 2016-01-21 21:58 UTC (permalink / raw)
To: Dan Williams; +Cc: linux-fsdevel, ext4, xfs
On Thu, Jan 21, 2016 at 08:37:11AM -0800, Dan Williams wrote:
> On Sun, Jan 3, 2016 at 9:54 PM, Dave Chinner <david@fromorbit.com> wrote:
> > From: Dave Chinner <dchinner@redhat.com>
> >
> > Rather than just being able to turn DAX on and off via a mount
> > option, some applications may only want to enable DAX for certain
> > performance critical files in a filesystem.
> >
> > This patch introduces a new inode flag to enable DAX in the v3 inode
> > di_flags2 field. It adds support for setting and clearing flags in
> > the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the
> > S_DAX inode flag appropriately when it is seen.
> >
> > When this flag is set on a directory, it acts as an "inherit flag".
> > That is, inodes created in the directory will automatically inherit
> > the on-disk inode DAX flag, enabling administrators to set up
> > directory heirarchies that automatically use DAX. Setting this flag
> > on an empty root directory will make the entire filesystem use DAX
> > by default.
>
> When switching from page-cache to DAX, don't we need to flush existing
> page cache mappings and remap directly? Or, is the thought that
> userspace needs to comprehend the presence of mixed mappings after
> changing S_DAX?
The change should be transparent to userspace. In general, I don't
expect users to change the behaviour of files that are in active use
(why would you do that?). This patch is really just introducing the
flag, the userspace API and making it propagate correctly via the
on-disk format. We'll fix up whatever problems with switching it
on/off dynamically as we go, like we do with most experimental
features once the on-disk behaviour is sorted out.
i.e. I've already got a couple of fixes we need to add to this - the
DAX flag is only valid on CRC enabled filesystems, so we need to
check that in the ioctl (general problem with using di_flags2 field,
not DAX flag specific issue). Adding a code to sync and unmap when
changing the flag is probably also necessary in the ioctl - I don't
have code to do that yet, but I have been thinking about it...
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-21 21:58 ` Dave Chinner
@ 2016-01-21 22:53 ` Dan Williams
2016-01-29 22:20 ` Dave Chinner
0 siblings, 1 reply; 12+ messages in thread
From: Dan Williams @ 2016-01-21 22:53 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, Matthew Wilcox, ext4, XFS Developers
On Thu, Jan 21, 2016 at 1:58 PM, Dave Chinner <david@fromorbit.com> wrote:
> On Thu, Jan 21, 2016 at 08:37:11AM -0800, Dan Williams wrote:
>> On Sun, Jan 3, 2016 at 9:54 PM, Dave Chinner <david@fromorbit.com> wrote:
>> > From: Dave Chinner <dchinner@redhat.com>
>> >
>> > Rather than just being able to turn DAX on and off via a mount
>> > option, some applications may only want to enable DAX for certain
>> > performance critical files in a filesystem.
>> >
>> > This patch introduces a new inode flag to enable DAX in the v3 inode
>> > di_flags2 field. It adds support for setting and clearing flags in
>> > the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the
>> > S_DAX inode flag appropriately when it is seen.
>> >
>> > When this flag is set on a directory, it acts as an "inherit flag".
>> > That is, inodes created in the directory will automatically inherit
>> > the on-disk inode DAX flag, enabling administrators to set up
>> > directory heirarchies that automatically use DAX. Setting this flag
>> > on an empty root directory will make the entire filesystem use DAX
>> > by default.
>>
>> When switching from page-cache to DAX, don't we need to flush existing
>> page cache mappings and remap directly? Or, is the thought that
>> userspace needs to comprehend the presence of mixed mappings after
>> changing S_DAX?
>
> The change should be transparent to userspace. In general, I don't
> expect users to change the behaviour of files that are in active use
> (why would you do that?).
If by accident someone tries to dynamically change S_DAX while
existing mappings are established I think the kernel should just
return EBUSY. I was not proposing we support it as a first-class
operation.
> This patch is really just introducing the
> flag, the userspace API and making it propagate correctly via the
> on-disk format. We'll fix up whatever problems with switching it
> on/off dynamically as we go, like we do with most experimental
> features once the on-disk behaviour is sorted out.
Ok.
> i.e. I've already got a couple of fixes we need to add to this - the
> DAX flag is only valid on CRC enabled filesystems,
I assume for torn-write protection? The CRC limitation makes sense,
but we theoretically could get the same effect by using a separate
logdev that does not tear writes, right?
> so we need to
> check that in the ioctl (general problem with using di_flags2 field,
> not DAX flag specific issue). Adding a code to sync and unmap when
> changing the flag is probably also necessary in the ioctl - I don't
> have code to do that yet, but I have been thinking about it...
Matthew and I have also talked about a modification of mincore(2) to
interrogate the effective mapping mode. It seems we'll need that or
something like it given the growing list of caveats with setting up a
DAX mapping.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-21 22:53 ` Dan Williams
@ 2016-01-29 22:20 ` Dave Chinner
0 siblings, 0 replies; 12+ messages in thread
From: Dave Chinner @ 2016-01-29 22:20 UTC (permalink / raw)
To: Dan Williams; +Cc: linux-fsdevel, Matthew Wilcox, ext4, XFS Developers
On Thu, Jan 21, 2016 at 02:53:06PM -0800, Dan Williams wrote:
> On Thu, Jan 21, 2016 at 1:58 PM, Dave Chinner <david@fromorbit.com> wrote:
> > On Thu, Jan 21, 2016 at 08:37:11AM -0800, Dan Williams wrote:
> >> On Sun, Jan 3, 2016 at 9:54 PM, Dave Chinner <david@fromorbit.com> wrote:
> > i.e. I've already got a couple of fixes we need to add to this - the
> > DAX flag is only valid on CRC enabled filesystems,
>
> I assume for torn-write protection? The CRC limitation makes sense,
> but we theoretically could get the same effect by using a separate
> logdev that does not tear writes, right?
No, it requires the CRC enabled format because there isn't any
flag space left in the v2 inode and so we need v3 inodes to store
the flag.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: introduce per-inode DAX enablement
2016-01-04 5:54 ` [PATCH 3/3] xfs: introduce per-inode DAX enablement Dave Chinner
2016-01-16 21:22 ` Theodore Ts'o
2016-01-21 16:37 ` Dan Williams
@ 2016-01-22 0:45 ` Darrick J. Wong
2 siblings, 0 replies; 12+ messages in thread
From: Darrick J. Wong @ 2016-01-22 0:45 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, ext4, xfs
On Mon, Jan 04, 2016 at 04:54:52PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> Rather than just being able to turn DAX on and off via a mount
> option, some applications may only want to enable DAX for certain
> performance critical files in a filesystem.
>
> This patch introduces a new inode flag to enable DAX in the v3 inode
> di_flags2 field. It adds support for setting and clearing flags in
> the di_flags2 field via the XFS_IOC_FSSETXATTR ioctl, and sets the
> S_DAX inode flag appropriately when it is seen.
>
> When this flag is set on a directory, it acts as an "inherit flag".
> That is, inodes created in the directory will automatically inherit
> the on-disk inode DAX flag, enabling administrators to set up
> directory heirarchies that automatically use DAX. Setting this flag
> on an empty root directory will make the entire filesystem use DAX
> by default.
>
> Signed-off-by: Dave Chinner <dchinner@redhat.com>
> ---
> fs/xfs/libxfs/xfs_format.h | 9 +++++++++
> fs/xfs/xfs_inode.c | 32 +++++++++++++++++++++++---------
> fs/xfs/xfs_ioctl.c | 18 +++++++++++++++++-
> fs/xfs/xfs_iops.c | 4 ++--
> include/uapi/linux/fs.h | 1 +
> 5 files changed, 52 insertions(+), 12 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
> index f28eeab..b4ae7ce 100644
> --- a/fs/xfs/libxfs/xfs_format.h
> +++ b/fs/xfs/libxfs/xfs_format.h
> @@ -1024,6 +1024,15 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
> XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM)
>
> /*
> + * Values for di_flags2 These start by being exposed to userspace in the upper
"Values for di_flags2. These are exposed to userspace in the..."
> + * 16 bits of the XFS_XFLAG_s range.
> + */
> +#define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */
> +#define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT)
> +
> +#define XFS_DIFLAG2_ANY (XFS_DIFLAG2_DAX)
Heh, I was gonna use bit 0 for reflink and bit 1 for cowextszhint. Well, I'll
move them up by one.
"cowextszhint"... in which language is that a word? ;)
--D
> +
> +/*
> * Inode number format:
> * low inopblog bits - offset in block
> * next agblklog bits - block number in ag
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index ca9ca5a..8929908 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -610,7 +610,9 @@ __xfs_iflock(
>
> STATIC uint
> _xfs_dic2xflags(
> - __uint16_t di_flags)
> + __uint16_t di_flags,
> + uint64_t di_flags2,
> + bool has_attr)
> {
> uint flags = 0;
>
> @@ -645,25 +647,32 @@ _xfs_dic2xflags(
> flags |= FS_XFLAG_FILESTREAM;
> }
>
> + if (di_flags2 & XFS_DIFLAG2_ANY) {
> + if (di_flags2 & XFS_DIFLAG2_DAX)
> + flags |= FS_XFLAG_DAX;
> + }
> +
> + if (has_attr)
> + flags |= FS_XFLAG_HASATTR;
> +
> return flags;
> }
>
> uint
> xfs_ip2xflags(
> - xfs_inode_t *ip)
> + struct xfs_inode *ip)
> {
> - xfs_icdinode_t *dic = &ip->i_d;
> + struct xfs_icdinode *dic = &ip->i_d;
>
> - return _xfs_dic2xflags(dic->di_flags) |
> - (XFS_IFORK_Q(ip) ? FS_XFLAG_HASATTR : 0);
> + return _xfs_dic2xflags(dic->di_flags, dic->di_flags2, XFS_IFORK_Q(ip));
> }
>
> uint
> xfs_dic2xflags(
> - xfs_dinode_t *dip)
> + struct xfs_dinode *dip)
> {
> - return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) |
> - (XFS_DFORK_Q(dip) ? FS_XFLAG_HASATTR : 0);
> + return _xfs_dic2xflags(be16_to_cpu(dip->di_flags),
> + be64_to_cpu(dip->di_flags2), XFS_DFORK_Q(dip));
> }
>
> /*
> @@ -862,7 +871,8 @@ xfs_ialloc(
> case S_IFREG:
> case S_IFDIR:
> if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) {
> - uint di_flags = 0;
> + uint64_t di_flags2 = 0;
> + uint di_flags = 0;
>
> if (S_ISDIR(mode)) {
> if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT)
> @@ -898,7 +908,11 @@ xfs_ialloc(
> di_flags |= XFS_DIFLAG_NODEFRAG;
> if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM)
> di_flags |= XFS_DIFLAG_FILESTREAM;
> + if (pip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
> + di_flags2 |= XFS_DIFLAG2_DAX;
> +
> ip->i_d.di_flags |= di_flags;
> + ip->i_d.di_flags2 |= di_flags2;
> }
> /* FALLTHROUGH */
> case S_IFLNK:
> diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> index 94b35eb3..478d04e 100644
> --- a/fs/xfs/xfs_ioctl.c
> +++ b/fs/xfs/xfs_ioctl.c
> @@ -945,6 +945,7 @@ xfs_set_diflags(
> unsigned int xflags)
> {
> unsigned int di_flags;
> + uint64_t di_flags2;
>
> /* can't set PREALLOC this way, just preserve it */
> di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
> @@ -977,8 +978,18 @@ xfs_set_diflags(
> if (xflags & FS_XFLAG_EXTSIZE)
> di_flags |= XFS_DIFLAG_EXTSIZE;
> }
> -
> ip->i_d.di_flags = di_flags;
> +
> + /* diflags2 only valid for v3 inodes. */
> + if (ip->i_d.di_version < 3)
> + return;
> +
> + di_flags2 = 0;
> + if (xflags & FS_XFLAG_DAX)
> + di_flags2 |= XFS_DIFLAG2_DAX;
> +
> + ip->i_d.di_flags2 = di_flags2;
> +
> }
>
> STATIC void
> @@ -1004,6 +1015,11 @@ xfs_diflags_to_linux(
> inode->i_flags |= S_NOATIME;
> else
> inode->i_flags &= ~S_NOATIME;
> + if (xflags & FS_XFLAG_DAX)
> + inode->i_flags |= S_DAX;
> + else
> + inode->i_flags &= ~S_DAX;
> +
> }
>
> static int
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index 245268a..a1b8af1 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -1201,8 +1201,8 @@ xfs_diflags_to_iflags(
> inode->i_flags |= S_SYNC;
> if (flags & XFS_DIFLAG_NOATIME)
> inode->i_flags |= S_NOATIME;
> - /* XXX: Also needs an on-disk per inode flag! */
> - if (ip->i_mount->m_flags & XFS_MOUNT_DAX)
> + if (ip->i_mount->m_flags & XFS_MOUNT_DAX ||
> + ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
> inode->i_flags |= S_DAX;
> }
>
> diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
> index df175dd..4cad4c8 100644
> --- a/include/uapi/linux/fs.h
> +++ b/include/uapi/linux/fs.h
> @@ -138,6 +138,7 @@ struct fsxattr {
> #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
> #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
> #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
> +#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
> #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
>
> /* the read-only stuff doesn't really belong here, but any other place is
> --
> 2.5.0
>
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 12+ messages in thread