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author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-10-30 10:47:26 +1100 |
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committer | Dave Chinner <david@fromorbit.com> | 2018-10-30 10:47:26 +1100 |
commit | 3fc9f5e409319e994d113cf1327ba6ab147423c2 (patch) | |
tree | c4829da4dca97ee610fb059363fef6362ab65bd2 /fs/xfs/xfs_file.c | |
parent | 7a6ccf004e234c01fb2a11771de9837c9ff3d56d (diff) | |
download | linux-3fc9f5e409319e994d113cf1327ba6ab147423c2.tar.gz linux-3fc9f5e409319e994d113cf1327ba6ab147423c2.tar.bz2 linux-3fc9f5e409319e994d113cf1327ba6ab147423c2.zip |
xfs: remove xfs_reflink_remap_range
Since xfs_file_remap_range is a thin wrapper, move the contents of
xfs_reflink_remap_range into the shell. This cuts down on the vfs
calls being made from internal xfs code.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_file.c')
-rw-r--r-- | fs/xfs/xfs_file.c | 65 |
1 files changed, 56 insertions, 9 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 7d42ab8fe6e1..53c9ab8fb777 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -919,20 +919,67 @@ out_unlock: return error; } -STATIC loff_t + +loff_t xfs_file_remap_range( - struct file *file_in, - loff_t pos_in, - struct file *file_out, - loff_t pos_out, - loff_t len, - unsigned int remap_flags) + struct file *file_in, + loff_t pos_in, + struct file *file_out, + loff_t pos_out, + loff_t len, + unsigned int remap_flags) { + struct inode *inode_in = file_inode(file_in); + struct xfs_inode *src = XFS_I(inode_in); + struct inode *inode_out = file_inode(file_out); + struct xfs_inode *dest = XFS_I(inode_out); + struct xfs_mount *mp = src->i_mount; + loff_t remapped = 0; + xfs_extlen_t cowextsize; + int ret; + if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) return -EINVAL; - return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, - len, remap_flags); + if (!xfs_sb_version_hasreflink(&mp->m_sb)) + return -EOPNOTSUPP; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -EIO; + + /* Prepare and then clone file data. */ + ret = xfs_reflink_remap_prep(file_in, pos_in, file_out, pos_out, + &len, remap_flags); + if (ret < 0 || len == 0) + return ret; + + trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); + + ret = xfs_reflink_remap_blocks(src, pos_in, dest, pos_out, len, + &remapped); + if (ret) + goto out_unlock; + + /* + * Carry the cowextsize hint from src to dest if we're sharing the + * entire source file to the entire destination file, the source file + * has a cowextsize hint, and the destination file does not. + */ + cowextsize = 0; + if (pos_in == 0 && len == i_size_read(inode_in) && + (src->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE) && + pos_out == 0 && len >= i_size_read(inode_out) && + !(dest->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) + cowextsize = src->i_d.di_cowextsize; + + ret = xfs_reflink_update_dest(dest, pos_out + len, cowextsize, + remap_flags); + +out_unlock: + xfs_reflink_remap_unlock(file_in, file_out); + if (ret) + trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_); + return remapped > 0 ? remapped : ret; } STATIC int |