diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-09-01 11:25:43 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-09-17 18:55:30 -0700 |
| commit | 07b7328f66eb82d292d7686fb534a5c313b23f34 (patch) | |
| tree | fa0316dc136acc4b8d8e3fd749c7817688373344 | |
| parent | b8d21abec50754dd717428dd1fed9957f181abf2 (diff) | |
xfs: implement FALLOC_FL_ZEROINIT_RANGE
Implement this new fallocate mode so that persistent memory users can,
upon receipt of a pmem poison notification, cause the pmem to be
reinitialized to a known value (zero) and clear any hardware poison
state that might be lurking.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
| -rw-r--r-- | fs/xfs/xfs_bmap_util.c | 22 | ||||
| -rw-r--r-- | fs/xfs/xfs_bmap_util.h | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_file.c | 9 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 1 |
4 files changed, 32 insertions, 2 deletions
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index f7804d3bba73..b1678a051e48 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -1004,6 +1004,28 @@ xfs_flush_unmap_range( } int +xfs_file_zeroinit_space( + struct xfs_inode *ip, + xfs_off_t offset, + xfs_off_t len) +{ + struct inode *inode = VFS_I(ip); + int error; + + trace_xfs_zeroinit_file_space(ip, offset, len); + + if (IS_DAX(inode)) + error = dax_zeroinit_range(inode, offset, len, + &xfs_read_iomap_ops); + else + error = iomap_zeroout_range(inode, offset, len, + &xfs_read_iomap_ops); + if (error == -ECANCELED) + return -EOPNOTSUPP; + return error; +} + +int xfs_free_file_space( struct xfs_inode *ip, xfs_off_t offset, diff --git a/fs/xfs/xfs_bmap_util.h b/fs/xfs/xfs_bmap_util.h index ff7dc1d9298a..6435c1ef8a92 100644 --- a/fs/xfs/xfs_bmap_util.h +++ b/fs/xfs/xfs_bmap_util.h @@ -61,6 +61,8 @@ int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset, xfs_off_t len); int xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset, xfs_off_t len); +int xfs_file_zeroinit_space(struct xfs_inode *ip, xfs_off_t offset, + xfs_off_t length); /* EOF block manipulation functions */ bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force); diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 959a3bed1dcd..a1f92395a5f0 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -987,6 +987,7 @@ xfs_break_layouts( #define XFS_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | \ + FALLOC_FL_ZEROINIT_RANGE | \ FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE | \ FALLOC_FL_MAP_FREE_SPACE) @@ -1039,13 +1040,17 @@ xfs_file_fallocate( * handled at the right time by xfs_prepare_shift(). */ if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE | - FALLOC_FL_COLLAPSE_RANGE)) { + FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZEROINIT_RANGE)) { error = xfs_flush_unmap_range(ip, offset, len); if (error) goto out_unlock; } - if (mode & FALLOC_FL_PUNCH_HOLE) { + if (mode & FALLOC_FL_ZEROINIT_RANGE) { + error = xfs_file_zeroinit_space(ip, offset, len); + if (error) + goto out_unlock; + } else if (mode & FALLOC_FL_PUNCH_HOLE) { /* Unshare around the region to punch, if needed. */ if (xfs_inode_needs_cow_around(ip)) { error = xfs_file_cow_around(ip, offset, len); diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index e66e0282c96c..0d44b873f813 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -1557,6 +1557,7 @@ DEFINE_SIMPLE_IO_EVENT(xfs_end_io_direct_write_append); DEFINE_SIMPLE_IO_EVENT(xfs_alloc_file_space); DEFINE_SIMPLE_IO_EVENT(xfs_free_file_space); DEFINE_SIMPLE_IO_EVENT(xfs_zero_file_space); +DEFINE_SIMPLE_IO_EVENT(xfs_zeroinit_file_space); DEFINE_SIMPLE_IO_EVENT(xfs_collapse_file_space); DEFINE_SIMPLE_IO_EVENT(xfs_insert_file_space); DEFINE_SIMPLE_IO_EVENT(xfs_map_free_rt_space); |