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xfs: XFS_DAS_LEAF_REPLACE state only needed if !LARP

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We can skip the REPLACE state when LARP is enabled, but that means
the XFS_DAS_FLIP_LFLAG state is now poorly named - it indicates
something that has been done rather than what the state is going to
do. Rename it to "REMOVE_OLD" to indicate that we are now going to
perform removal of the old attr.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Allison Henderson<allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner 2022-05-12 15:12:55 +10:00 committed by Dave Chinner
parent 7d03533629
commit 411b434a63
3 changed files with 75 additions and 54 deletions
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81
fs/xfs/libxfs/xfs_attr.c
View File

@ -295,6 +295,26 @@ out:
return error;
}
/*
* When we bump the state to REPLACE, we may actually need to skip over the
* state. When LARP mode is enabled, we don't need to run the atomic flags flip,
* so we skip straight over the REPLACE state and go on to REMOVE_OLD.
*/
static void
xfs_attr_dela_state_set_replace(
struct xfs_attr_item *attr,
enum xfs_delattr_state replace)
{
struct xfs_da_args *args = attr->xattri_da_args;
ASSERT(replace == XFS_DAS_LEAF_REPLACE ||
replace == XFS_DAS_NODE_REPLACE);
attr->xattri_dela_state = replace;
if (xfs_has_larp(args->dp->i_mount))
attr->xattri_dela_state++;
}
static int
xfs_attr_leaf_addname(
struct xfs_attr_item *attr)
@ -337,7 +357,7 @@ xfs_attr_leaf_addname(
attr->xattri_dela_state = XFS_DAS_LEAF_SET_RMT;
error = -EAGAIN;
} else if (args->op_flags & XFS_DA_OP_RENAME) {
attr->xattri_dela_state = XFS_DAS_LEAF_REPLACE;
xfs_attr_dela_state_set_replace(attr, XFS_DAS_LEAF_REPLACE);
error = -EAGAIN;
} else {
attr->xattri_dela_state = XFS_DAS_DONE;
@ -368,7 +388,7 @@ xfs_attr_node_addname(
attr->xattri_dela_state = XFS_DAS_NODE_SET_RMT;
error = -EAGAIN;
} else if (args->op_flags & XFS_DA_OP_RENAME) {
attr->xattri_dela_state = XFS_DAS_NODE_REPLACE;
xfs_attr_dela_state_set_replace(attr, XFS_DAS_NODE_REPLACE);
error = -EAGAIN;
} else {
attr->xattri_dela_state = XFS_DAS_DONE;
@ -395,8 +415,11 @@ xfs_attr_rmtval_alloc(
error = xfs_attr_rmtval_set_blk(attr);
if (error)
return error;
error = -EAGAIN;
goto out;
/* Roll the transaction only if there is more to allocate. */
if (attr->xattri_blkcnt > 0) {
error = -EAGAIN;
goto out;
}
}
error = xfs_attr_rmtval_set_value(args);
@ -407,6 +430,13 @@ xfs_attr_rmtval_alloc(
if (!(args->op_flags & XFS_DA_OP_RENAME)) {
error = xfs_attr3_leaf_clearflag(args);
attr->xattri_dela_state = XFS_DAS_DONE;
} else {
/*
* We are running a REPLACE operation, so we need to bump the
* state to the step in that operation.
*/
attr->xattri_dela_state++;
xfs_attr_dela_state_set_replace(attr, attr->xattri_dela_state);
}
out:
trace_xfs_attr_rmtval_alloc(attr->xattri_dela_state, args->dp);
@ -428,7 +458,6 @@ xfs_attr_set_iter(
struct xfs_inode *dp = args->dp;
struct xfs_buf *bp = NULL;
int forkoff, error = 0;
struct xfs_mount *mp = args->dp->i_mount;
/* State machine switch */
next_state:
@ -458,37 +487,29 @@ next_state:
return error;
if (attr->xattri_dela_state == XFS_DAS_DONE)
break;
attr->xattri_dela_state++;
fallthrough;
goto next_state;
case XFS_DAS_LEAF_REPLACE:
case XFS_DAS_NODE_REPLACE:
/*
* If this is an atomic rename operation, we must "flip" the
* incomplete flags on the "new" and "old" attribute/value pairs
* so that one disappears and one appears atomically. Then we
* must remove the "old" attribute/value pair.
*
* In a separate transaction, set the incomplete flag on the
* "old" attr and clear the incomplete flag on the "new" attr.
* We must "flip" the incomplete flags on the "new" and "old"
* attribute/value pairs so that one disappears and one appears
* atomically. Then we must remove the "old" attribute/value
* pair.
*/
if (!xfs_has_larp(mp)) {
error = xfs_attr3_leaf_flipflags(args);
if (error)
return error;
/*
* Commit the flag value change and start the next trans
* in series at FLIP_FLAG.
*/
error = -EAGAIN;
attr->xattri_dela_state++;
break;
}
error = xfs_attr3_leaf_flipflags(args);
if (error)
return error;
/*
* Commit the flag value change and start the next trans
* in series at REMOVE_OLD.
*/
error = -EAGAIN;
attr->xattri_dela_state++;
fallthrough;
case XFS_DAS_FLIP_LFLAG:
case XFS_DAS_FLIP_NFLAG:
break;
case XFS_DAS_LEAF_REMOVE_OLD:
case XFS_DAS_NODE_REMOVE_OLD:
/*
* Dismantle the "old" attribute/value pair by removing a
* "remote" value (if it exists).

44
fs/xfs/libxfs/xfs_attr.h
View File

@ -455,7 +455,7 @@ enum xfs_delattr_state {
XFS_DAS_LEAF_SET_RMT, /* set a remote xattr from a leaf */
XFS_DAS_LEAF_ALLOC_RMT, /* We are allocating remote blocks */
XFS_DAS_LEAF_REPLACE, /* Perform replace ops on a leaf */
XFS_DAS_FLIP_LFLAG, /* Flipped leaf INCOMPLETE attr flag */
XFS_DAS_LEAF_REMOVE_OLD, /* Start removing old attr from leaf */
XFS_DAS_RM_LBLK, /* A rename is removing leaf blocks */
XFS_DAS_RD_LEAF, /* Read in the new leaf */
@ -463,7 +463,7 @@ enum xfs_delattr_state {
XFS_DAS_NODE_SET_RMT, /* set a remote xattr from a node */
XFS_DAS_NODE_ALLOC_RMT, /* We are allocating remote blocks */
XFS_DAS_NODE_REPLACE, /* Perform replace ops on a node */
XFS_DAS_FLIP_NFLAG, /* Flipped node INCOMPLETE attr flag */
XFS_DAS_NODE_REMOVE_OLD, /* Start removing old attr from node */
XFS_DAS_RM_NBLK, /* A rename is removing node blocks */
XFS_DAS_CLR_FLAG, /* Clear incomplete flag */
@ -471,26 +471,26 @@ enum xfs_delattr_state {
};
#define XFS_DAS_STRINGS \
{ XFS_DAS_UNINIT, "XFS_DAS_UNINIT" }, \
{ XFS_DAS_SF_ADD, "XFS_DAS_SF_ADD" }, \
{ XFS_DAS_LEAF_ADD, "XFS_DAS_LEAF_ADD" }, \
{ XFS_DAS_NODE_ADD, "XFS_DAS_NODE_ADD" }, \
{ XFS_DAS_RMTBLK, "XFS_DAS_RMTBLK" }, \
{ XFS_DAS_RM_NAME, "XFS_DAS_RM_NAME" }, \
{ XFS_DAS_RM_SHRINK, "XFS_DAS_RM_SHRINK" }, \
{ XFS_DAS_LEAF_SET_RMT, "XFS_DAS_LEAF_SET_RMT" }, \
{ XFS_DAS_LEAF_ALLOC_RMT, "XFS_DAS_LEAF_ALLOC_RMT" }, \
{ XFS_DAS_LEAF_REPLACE, "XFS_DAS_LEAF_REPLACE" }, \
{ XFS_DAS_FLIP_LFLAG, "XFS_DAS_FLIP_LFLAG" }, \
{ XFS_DAS_RM_LBLK, "XFS_DAS_RM_LBLK" }, \
{ XFS_DAS_RD_LEAF, "XFS_DAS_RD_LEAF" }, \
{ XFS_DAS_NODE_SET_RMT, "XFS_DAS_NODE_SET_RMT" }, \
{ XFS_DAS_NODE_ALLOC_RMT, "XFS_DAS_NODE_ALLOC_RMT" }, \
{ XFS_DAS_NODE_REPLACE, "XFS_DAS_NODE_REPLACE" }, \
{ XFS_DAS_FLIP_NFLAG, "XFS_DAS_FLIP_NFLAG" }, \
{ XFS_DAS_RM_NBLK, "XFS_DAS_RM_NBLK" }, \
{ XFS_DAS_CLR_FLAG, "XFS_DAS_CLR_FLAG" }, \
{ XFS_DAS_DONE, "XFS_DAS_DONE" }
{ XFS_DAS_UNINIT, "XFS_DAS_UNINIT" }, \
{ XFS_DAS_SF_ADD, "XFS_DAS_SF_ADD" }, \
{ XFS_DAS_LEAF_ADD, "XFS_DAS_LEAF_ADD" }, \
{ XFS_DAS_NODE_ADD, "XFS_DAS_NODE_ADD" }, \
{ XFS_DAS_RMTBLK, "XFS_DAS_RMTBLK" }, \
{ XFS_DAS_RM_NAME, "XFS_DAS_RM_NAME" }, \
{ XFS_DAS_RM_SHRINK, "XFS_DAS_RM_SHRINK" }, \
{ XFS_DAS_LEAF_SET_RMT, "XFS_DAS_LEAF_SET_RMT" }, \
{ XFS_DAS_LEAF_ALLOC_RMT, "XFS_DAS_LEAF_ALLOC_RMT" }, \
{ XFS_DAS_LEAF_REPLACE, "XFS_DAS_LEAF_REPLACE" }, \
{ XFS_DAS_LEAF_REMOVE_OLD, "XFS_DAS_LEAF_REMOVE_OLD" }, \
{ XFS_DAS_RM_LBLK, "XFS_DAS_RM_LBLK" }, \
{ XFS_DAS_RD_LEAF, "XFS_DAS_RD_LEAF" }, \
{ XFS_DAS_NODE_SET_RMT, "XFS_DAS_NODE_SET_RMT" }, \
{ XFS_DAS_NODE_ALLOC_RMT, "XFS_DAS_NODE_ALLOC_RMT" }, \
{ XFS_DAS_NODE_REPLACE, "XFS_DAS_NODE_REPLACE" }, \
{ XFS_DAS_NODE_REMOVE_OLD, "XFS_DAS_NODE_REMOVE_OLD" }, \
{ XFS_DAS_RM_NBLK, "XFS_DAS_RM_NBLK" }, \
{ XFS_DAS_CLR_FLAG, "XFS_DAS_CLR_FLAG" }, \
{ XFS_DAS_DONE, "XFS_DAS_DONE" }
/*
* Defines for xfs_attr_item.xattri_flags

4
fs/xfs/xfs_trace.h
View File

@ -4139,13 +4139,13 @@ TRACE_DEFINE_ENUM(XFS_DAS_RM_SHRINK);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_SET_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_ALLOC_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REPLACE);
TRACE_DEFINE_ENUM(XFS_DAS_FLIP_LFLAG);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_OLD);
TRACE_DEFINE_ENUM(XFS_DAS_RM_LBLK);
TRACE_DEFINE_ENUM(XFS_DAS_RD_LEAF);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_SET_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_ALLOC_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_REPLACE);
TRACE_DEFINE_ENUM(XFS_DAS_FLIP_NFLAG);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_OLD);
TRACE_DEFINE_ENUM(XFS_DAS_RM_NBLK);
TRACE_DEFINE_ENUM(XFS_DAS_CLR_FLAG);