This is version 3 of the hole punching series I''ve been posting. Not much has changed, the history is below V2->V3 -FALLOC_FL_PUNCH_HOLE must also have FALLOC_FL_KEEP_SIZE in order to work -formatting fixes V1->V2 -Hole punching doesn''t change file size -Fixed the mode checks in ext4/btrfs/gfs2 so they do what they are supposed to I''ve updated my local copies of the xfsprogs patches I have to test this to use KEEP_SIZE and PUNCH_HOLE together, I''ll post them after it looks like these patches are good to go, including the manpage update. The xfstest I wrote ran fine both on xfs and btrfs (failing on btrfs obviously). Thanks, Josef
Hole punching has already been implemented by XFS and OCFS2, and has the potential to be implemented on both BTRFS and EXT4 so we need a generic way to get to this feature. The simplest way in my mind is to add FALLOC_FL_PUNCH_HOLE to fallocate() since it already looks like the normal fallocate() operation. I''ve tested this patch with XFS and BTRFS to make sure XFS did what it''s supposed to do and that BTRFS failed like it was supposed to. Thank you, Signed-off-by: Josef Bacik <josef@redhat.com> --- fs/open.c | 7 ++++++- include/linux/falloc.h | 1 + 2 files changed, 7 insertions(+), 1 deletions(-) diff --git a/fs/open.c b/fs/open.c index 4197b9e..5b6ef7e 100644 --- a/fs/open.c +++ b/fs/open.c @@ -223,7 +223,12 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len) return -EINVAL; /* Return error if mode is not supported */ - if (mode && !(mode & FALLOC_FL_KEEP_SIZE)) + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) + return -EOPNOTSUPP; + + /* Punch hole must have keep size set */ + if ((mode & FALLOC_FL_PUNCH_HOLE) && + !(mode & FALLOC_FL_KEEP_SIZE)) return -EOPNOTSUPP; if (!(file->f_mode & FMODE_WRITE)) diff --git a/include/linux/falloc.h b/include/linux/falloc.h index 3c15510..73e0b62 100644 --- a/include/linux/falloc.h +++ b/include/linux/falloc.h @@ -2,6 +2,7 @@ #define _FALLOC_H_ #define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */ +#define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */ #ifdef __KERNEL__ -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Josef Bacik
2010-Nov-18 01:46 UTC
[PATCH 2/6] XFS: handle hole punching via fallocate properly
This patch simply allows XFS to handle the hole punching flag in fallocate
properly. I''ve tested this with a little program that does a bunch of
random
hole punching with FL_KEEP_SIZE and without it to make sure it does the right
thing. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
---
fs/xfs/linux-2.6/xfs_iops.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 96107ef..07d2164 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -516,6 +516,7 @@ xfs_vn_fallocate(
loff_t new_size = 0;
xfs_flock64_t bf;
xfs_inode_t *ip = XFS_I(inode);
+ int cmd = XFS_IOC_RESVSP;
/* preallocation on directories not yet supported */
error = -ENODEV;
@@ -528,6 +529,9 @@ xfs_vn_fallocate(
xfs_ilock(ip, XFS_IOLOCK_EXCL);
+ if (mode & FALLOC_FL_PUNCH_HOLE)
+ cmd = XFS_IOC_UNRESVSP;
+
/* check the new inode size is valid before allocating */
if (!(mode & FALLOC_FL_KEEP_SIZE) &&
offset + len > i_size_read(inode)) {
@@ -537,8 +541,7 @@ xfs_vn_fallocate(
goto out_unlock;
}
- error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
- 0, XFS_ATTR_NOLOCK);
+ error = -xfs_change_file_space(ip, cmd, &bf, 0, XFS_ATTR_NOLOCK);
if (error)
goto out_unlock;
--
1.6.6.1
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Josef Bacik
2010-Nov-18 01:46 UTC
[PATCH 3/6] Ocfs2: handle hole punching via fallocate properly
This patch just makes ocfs2 use its UNRESERVP ioctl when we get the hole punch flag in fallocate. I didn''t test it, but it seems simple enough. Thanks, Acked-by: Jan Kara <jack@suse.cz> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Josef Bacik <josef@redhat.com> --- fs/ocfs2/file.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 77b4c04..ad23a18 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1992,6 +1992,7 @@ static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct ocfs2_space_resv sr; int change_size = 1; + int cmd = OCFS2_IOC_RESVSP64; if (!ocfs2_writes_unwritten_extents(osb)) return -EOPNOTSUPP; @@ -2002,12 +2003,15 @@ static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, if (mode & FALLOC_FL_KEEP_SIZE) change_size = 0; + if (mode & FALLOC_FL_PUNCH_HOLE) + cmd = OCFS2_IOC_UNRESVSP64; + sr.l_whence = 0; sr.l_start = (s64)offset; sr.l_len = (s64)len; - return __ocfs2_change_file_space(NULL, inode, offset, - OCFS2_IOC_RESVSP64, &sr, change_size); + return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, + change_size); } int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, -- 1.6.6.1
Ext4 doesn''t have the ability to punch holes yet, so make sure we return EOPNOTSUPP if we try to use hole punching through fallocate. This support can be added later. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> --- fs/ext4/extents.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 0554c48..35bca73 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3622,6 +3622,10 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len) struct ext4_map_blocks map; unsigned int credits, blkbits = inode->i_blkbits; + /* We only support the FALLOC_FL_KEEP_SIZE mode */ + if (mode && (mode != FALLOC_FL_KEEP_SIZE)) + return -EOPNOTSUPP; + /* * currently supporting (pre)allocate mode for extent-based * files _only_ -- 1.6.6.1
Btrfs doesn''t have the ability to punch holes yet, so make sure we return EOPNOTSUPP if we try to use hole punching through fallocate. This support can be added later. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> --- fs/btrfs/inode.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 78877d7..6f08892 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6936,6 +6936,10 @@ static long btrfs_fallocate(struct inode *inode, int mode, alloc_start = offset & ~mask; alloc_end = (offset + len + mask) & ~mask; + /* We only support the FALLOC_FL_KEEP_SIZE mode */ + if (mode && (mode != FALLOC_FL_KEEP_SIZE)) + return -EOPNOTSUPP; + /* * wait for ordered IO before we have any locks. We''ll loop again * below with the locks held. -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Gfs2 doesn''t have the ability to punch holes yet, so make sure we return EOPNOTSUPP if we try to use hole punching through fallocate. This support can be added later. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> --- fs/gfs2/ops_inode.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 12cbea7..65cb5f6 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -1439,6 +1439,10 @@ static long gfs2_fallocate(struct inode *inode, int mode, loff_t offset, loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift; next = (next + 1) << sdp->sd_sb.sb_bsize_shift; + /* We only support the FALLOC_FL_KEEP_SIZE mode */ + if (mode && (mode != FALLOC_FL_KEEP_SIZE)) + return -EOPNOTSUPP; + offset = (offset >> sdp->sd_sb.sb_bsize_shift) << sdp->sd_sb.sb_bsize_shift; -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed 17-11-10 20:46:15, Josef Bacik wrote:> Hole punching has already been implemented by XFS and OCFS2, and has the > potential to be implemented on both BTRFS and EXT4 so we need a generic way to > get to this feature. The simplest way in my mind is to add FALLOC_FL_PUNCH_HOLE > to fallocate() since it already looks like the normal fallocate() operation. > I''ve tested this patch with XFS and BTRFS to make sure XFS did what it''s > supposed to do and that BTRFS failed like it was supposed to. Thank you,Looks nice now. Acked-by: Jan Kara <jack@suse.cz> Honza> > Signed-off-by: Josef Bacik <josef@redhat.com> > --- > fs/open.c | 7 ++++++- > include/linux/falloc.h | 1 + > 2 files changed, 7 insertions(+), 1 deletions(-) > > diff --git a/fs/open.c b/fs/open.c > index 4197b9e..5b6ef7e 100644 > --- a/fs/open.c > +++ b/fs/open.c > @@ -223,7 +223,12 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len) > return -EINVAL; > > /* Return error if mode is not supported */ > - if (mode && !(mode & FALLOC_FL_KEEP_SIZE)) > + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) > + return -EOPNOTSUPP; > + > + /* Punch hole must have keep size set */ > + if ((mode & FALLOC_FL_PUNCH_HOLE) && > + !(mode & FALLOC_FL_KEEP_SIZE)) > return -EOPNOTSUPP; > > if (!(file->f_mode & FMODE_WRITE)) > diff --git a/include/linux/falloc.h b/include/linux/falloc.h > index 3c15510..73e0b62 100644 > --- a/include/linux/falloc.h > +++ b/include/linux/falloc.h > @@ -2,6 +2,7 @@ > #define _FALLOC_H_ > > #define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */ > +#define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */ > > #ifdef __KERNEL__ > > -- > 1.6.6.1 >-- Jan Kara <jack@suse.cz> SUSE Labs, CR
On Wed, Nov 17, 2010 at 08:46:14PM -0500, Josef Bacik wrote:> This is version 3 of the hole punching series I''ve been posting. Not much has > changed, the history is below > > V2->V3 > -FALLOC_FL_PUNCH_HOLE must also have FALLOC_FL_KEEP_SIZE in order to work > -formatting fixes > > V1->V2 > -Hole punching doesn''t change file size > -Fixed the mode checks in ext4/btrfs/gfs2 so they do what they are supposed to > > I''ve updated my local copies of the xfsprogs patches I have to test this to use > KEEP_SIZE and PUNCH_HOLE together, I''ll post them after it looks like these > patches are good to go, including the manpage update. The xfstest I wrote ran > fine both on xfs and btrfs (failing on btrfs obviously). Thanks, >I''d like to try and get this into the next merge window, it seems everybody is happy with it so far, any other comments? Provided everybody is ok with it, how would you like me to send it to you Linus? Would you prefer a pull request or will you just pull the patches off the mailinglist? Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html