On 05/07/2018 03:59 PM, Darrick J. Wong wrote:
On Sun, May 06, 2018 at 10:24:39AM -0700, Allison Henderson wrote:
These routines set up set and start a new deferred attribute
operation. These functions are meant to be called by other
code needing to initiate a deferred attribute operation. We
will use these routines later in the parent pointer patches.
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_attr.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_attr.h | 5 ++++
2 files changed, 74 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 2f295ca..adbcef2 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -468,6 +468,42 @@ xfs_attr_set(
return error;
}
+/* Sets an attribute for an inode as a deferred operation */
+int
+xfs_attr_set_deferred(
+ struct xfs_inode *dp,
+ struct xfs_defer_ops *dfops,
+ void *name,
+ unsigned int namelen,
+ void *value,
+ unsigned int valuelen,
+ int flags)
+{
+
+ struct xfs_attr_item *new;
+ char *name_value;
+
+ if (!namelen || !valuelen) {
+ ASSERT(0);
+ return -EFSCORRUPTED;
+ }
+
+ new = kmem_alloc(XFS_ATTR_ITEM_SIZEOF(namelen, valuelen),
+ KM_SLEEP|KM_NOFS);
+ name_value = ((char *)new) + sizeof(struct xfs_attr_item);
+ memset(new, 0, XFS_ATTR_ITEM_SIZEOF(namelen, valuelen));
+ new->xattri_ip = dp;
+ new->xattri_op_flags = XFS_ATTR_OP_FLAGS_SET;
+ new->xattri_name_len = namelen;
+ new->xattri_value_len = valuelen;
+ new->xattri_flags = flags;
+ memcpy(&name_value[0], name, namelen);
+ memcpy(&name_value[namelen], value, valuelen);
If we're going to keep the inode locked across _defer_finish rolls then
we need to xfs_defer_ijoin the inode to the dfops so that the inode is
relogged in each transaction, which prevents the log tail from being
pinned unnecessarily. xfs_bmap.c does a similar thing with the deferred
map/unmap intents.
+
+ xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
+
+ return 0;
+}
/*
* Generic handler routine to remove a name from an attribute list.
@@ -560,6 +596,39 @@ xfs_attr_remove(
return error;
}
+/* Removes an attribute for an inode as a deferred operation */
+int
+xfs_attr_remove_deferred(
+ struct xfs_inode *dp,
+ struct xfs_defer_ops *dfops,
+ void *name,
+ unsigned int namelen,
+ int flags)
+{
+
+ struct xfs_attr_item *new;
+ char *name_value;
+
+ if (!namelen) {
+ ASSERT(0);
+ return -EFSCORRUPTED;
+ }
+
+ new = kmem_alloc(XFS_ATTR_ITEM_SIZEOF(namelen, 0), KM_SLEEP|KM_NOFS);
+ name_value = ((char *)new) + sizeof(struct xfs_attr_item);
+ memset(new, 0, XFS_ATTR_ITEM_SIZEOF(namelen, 0));
+ new->xattri_ip = dp;
+ new->xattri_op_flags = XFS_ATTR_OP_FLAGS_REMOVE;
+ new->xattri_name_len = namelen;
+ new->xattri_value_len = 0;
+ new->xattri_flags = flags;
+ memcpy(name_value, name, namelen);
Same here.
--D
Ok, I will add in the xfs_defer_ijoin's. Thx!
Allison
+ xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
+
+ return 0;
+}
+
/*========================================================================
* External routines when attribute list is inside the inode
*========================================================================*/
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 33b33d3..ec26565 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -183,5 +183,10 @@ int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
int xfs_attr_args_init(struct xfs_da_args *args, struct xfs_inode *dp,
const unsigned char *name, int flags);
int xfs_attr_calc_size(struct xfs_da_args *args, int *local);
+int xfs_attr_set_deferred(struct xfs_inode *dp, struct xfs_defer_ops *dfops,
+ void *name, unsigned int name_len, void *value,
+ unsigned int valuelen, int flags);
+int xfs_attr_remove_deferred(struct xfs_inode *dp, struct xfs_defer_ops *dfops,
+ void *name, unsigned int namelen, int flags);
#endif /* __XFS_ATTR_H__ */
--
2.7.4
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