From: Allison Henderson <allison.henderson@xxxxxxxxxx>
Add parent pointer attribute during xfs_create, and subroutines to
initialize attributes
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
[djwong: shorten names, adjust to new format]
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/Makefile | 1
fs/xfs/libxfs/xfs_attr.c | 4 +-
fs/xfs/libxfs/xfs_attr.h | 4 +-
fs/xfs/libxfs/xfs_parent.c | 101 +++++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_parent.h | 41 +++++++++++++++-
fs/xfs/libxfs/xfs_trans_space.c | 52 ++++++++++++++++++++
fs/xfs/libxfs/xfs_trans_space.h | 9 ++-
fs/xfs/scrub/tempfile.c | 2 -
fs/xfs/xfs_inode.c | 33 ++++++++++---
fs/xfs/xfs_super.c | 10 ++++
fs/xfs/xfs_xattr.c | 4 +-
fs/xfs/xfs_xattr.h | 2 +
12 files changed, 246 insertions(+), 17 deletions(-)
create mode 100644 fs/xfs/libxfs/xfs_trans_space.c
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 3f2b9dfb1358..662cf1002639 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -51,6 +51,7 @@ xfs-y += $(addprefix libxfs/, \
xfs_symlink_remote.o \
xfs_trans_inode.o \
xfs_trans_resv.o \
+ xfs_trans_space.o \
xfs_types.o \
)
# xfs_rtbitmap is shared with libxfs
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 0d381b3e828a..af04bdbb9881 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -895,7 +895,7 @@ xfs_attr_lookup(
return error;
}
-static int
+int
xfs_attr_intent_init(
struct xfs_da_args *args,
unsigned int op_flags, /* op flag (set or remove) */
@@ -913,7 +913,7 @@ xfs_attr_intent_init(
}
/* Sets an attribute for an inode as a deferred operation */
-static int
+int
xfs_attr_defer_add(
struct xfs_da_args *args)
{
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index d2165c85f16b..d77c132ff546 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -549,6 +549,7 @@ int xfs_inode_hasattr(struct xfs_inode *ip);
bool xfs_attr_is_leaf(struct xfs_inode *ip);
int xfs_attr_get_ilocked(struct xfs_da_args *args);
int xfs_attr_get(struct xfs_da_args *args);
+int xfs_attr_defer_add(struct xfs_da_args *args);
int xfs_attr_set(struct xfs_da_args *args);
int xfs_attr_set_iter(struct xfs_attr_intent *attr);
int xfs_attr_remove_iter(struct xfs_attr_intent *attr);
@@ -557,7 +558,8 @@ bool xfs_attr_namecheck(struct xfs_mount *mp, const void *name, size_t length,
int xfs_attr_calc_size(struct xfs_da_args *args, int *local);
void xfs_init_attr_trans(struct xfs_da_args *args, struct xfs_trans_res *tres,
unsigned int *total);
-
+int xfs_attr_intent_init(struct xfs_da_args *args, unsigned int op_flags,
+ struct xfs_attr_intent **attr);
/*
* Check to see if the attr should be upgraded from non-existent or shortform to
* single-leaf-block attribute list.
diff --git a/fs/xfs/libxfs/xfs_parent.c b/fs/xfs/libxfs/xfs_parent.c
index 3d9f5051f87b..e90e428c047b 100644
--- a/fs/xfs/libxfs/xfs_parent.c
+++ b/fs/xfs/libxfs/xfs_parent.c
@@ -28,6 +28,8 @@
#include "xfs_parent.h"
#include "xfs_trans_space.h"
+struct kmem_cache *xfs_parent_intent_cache;
+
/*
* Parent pointer attribute handling.
*
@@ -90,3 +92,102 @@ xfs_parent_valuecheck(
return true;
}
+
+/* Initializes a xfs_parent_name_rec to be stored as an attribute name. */
+static inline void
+xfs_init_parent_name_rec(
+ struct xfs_parent_name_rec *rec,
+ const struct xfs_inode *dp,
+ const struct xfs_name *name,
+ struct xfs_inode *ip)
+{
+ rec->p_ino = cpu_to_be64(dp->i_ino);
+ rec->p_gen = cpu_to_be32(VFS_IC(dp)->i_generation);
+ rec->p_namehash = cpu_to_be32(xfs_dir2_hashname(dp->i_mount, name));
+}
+
+/* Point the da args value fields at the non-key parts of a parent pointer. */
+static inline void
+xfs_init_parent_davalue(
+ struct xfs_da_args *args,
+ const struct xfs_name *name)
+{
+ args->valuelen = name->len;
+ args->value = (void *)name->name;
+}
+
+/*
+ * Allocate memory to control a logged parent pointer update as part of a
+ * dirent operation.
+ */
+int
+__xfs_parent_init(
+ struct xfs_mount *mp,
+ struct xfs_parent_defer **parentp)
+{
+ struct xfs_parent_defer *parent;
+ int error;
+
+ error = xfs_attr_grab_log_assist(mp);
+ if (error)
+ return error;
+
+ parent = kmem_cache_zalloc(xfs_parent_intent_cache, GFP_KERNEL);
+ if (!parent) {
+ xfs_attr_rele_log_assist(mp);
+ return -ENOMEM;
+ }
+
+ /* init parent da_args */
+ parent->args.geo = mp->m_attr_geo;
+ parent->args.whichfork = XFS_ATTR_FORK;
+ parent->args.attr_filter = XFS_ATTR_PARENT;
+ parent->args.op_flags = XFS_DA_OP_OKNOENT | XFS_DA_OP_LOGGED |
+ XFS_DA_OP_NVLOOKUP;
+ parent->args.name = (const uint8_t *)&parent->rec;
+ parent->args.namelen = sizeof(struct xfs_parent_name_rec);
+
+ *parentp = parent;
+ return 0;
+}
+
+static inline xfs_dahash_t
+xfs_parent_hashname(
+ struct xfs_inode *ip,
+ const struct xfs_parent_defer *parent)
+{
+ return xfs_da_hashname((const void *)&parent->rec,
+ sizeof(struct xfs_parent_name_rec));
+}
+
+/* Add a parent pointer to reflect a dirent addition. */
+int
+xfs_parent_add(
+ struct xfs_trans *tp,
+ struct xfs_parent_defer *parent,
+ struct xfs_inode *dp,
+ const struct xfs_name *parent_name,
+ struct xfs_inode *child)
+{
+ struct xfs_da_args *args = &parent->args;
+
+ xfs_init_parent_name_rec(&parent->rec, dp, parent_name, child);
+ args->hashval = xfs_parent_hashname(dp, parent);
+
+ args->trans = tp;
+ args->dp = child;
+
+ xfs_init_parent_davalue(&parent->args, parent_name);
+
+ return xfs_attr_defer_add(args);
+}
+
+/* Cancel a parent pointer operation. */
+void
+__xfs_parent_cancel(
+ struct xfs_mount *mp,
+ struct xfs_parent_defer *parent)
+{
+ xlog_drop_incompat_feat(mp->m_log, XLOG_INCOMPAT_FEAT_XATTRS);
+ kmem_cache_free(xfs_parent_intent_cache, parent);
+}
diff --git a/fs/xfs/libxfs/xfs_parent.h b/fs/xfs/libxfs/xfs_parent.h
index 6e2a2528d2d8..43551956508a 100644
--- a/fs/xfs/libxfs/xfs_parent.h
+++ b/fs/xfs/libxfs/xfs_parent.h
@@ -13,4 +13,43 @@ bool xfs_parent_namecheck(struct xfs_mount *mp,
bool xfs_parent_valuecheck(struct xfs_mount *mp, const void *value,
size_t valuelen);
-#endif /* __XFS_PARENT_H__ */
+extern struct kmem_cache *xfs_parent_intent_cache;
+
+/*
+ * Dynamically allocd structure used to wrap the needed data to pass around
+ * the defer ops machinery
+ */
+struct xfs_parent_defer {
+ struct xfs_parent_name_rec rec;
+ struct xfs_da_args args;
+};
+
+int __xfs_parent_init(struct xfs_mount *mp, struct xfs_parent_defer **parentp);
+
+static inline int
+xfs_parent_start(
+ struct xfs_mount *mp,
+ struct xfs_parent_defer **pp)
+{
+ *pp = NULL;
+
+ if (xfs_has_parent(mp))
+ return __xfs_parent_init(mp, pp);
+ return 0;
+}
+
+int xfs_parent_add(struct xfs_trans *tp, struct xfs_parent_defer *parent,
+ struct xfs_inode *dp, const struct xfs_name *parent_name,
+ struct xfs_inode *child);
+void __xfs_parent_cancel(struct xfs_mount *mp, struct xfs_parent_defer *parent);
+
+static inline void
+xfs_parent_finish(
+ struct xfs_mount *mp,
+ struct xfs_parent_defer *p)
+{
+ if (p)
+ __xfs_parent_cancel(mp, p);
+}
+
+#endif /* __XFS_PARENT_H__ */
diff --git a/fs/xfs/libxfs/xfs_trans_space.c b/fs/xfs/libxfs/xfs_trans_space.c
new file mode 100644
index 000000000000..90532c3fa205
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_trans_space.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_da_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_da_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_trans_space.h"
+
+/* Calculate the disk space required to add a parent pointer. */
+unsigned int
+xfs_parent_calc_space_res(
+ struct xfs_mount *mp,
+ unsigned int namelen)
+{
+ /*
+ * Parent pointers are always the first attr in an attr tree, and never
+ * larger than a block
+ */
+ return XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) +
+ XFS_NEXTENTADD_SPACE_RES(mp, namelen, XFS_ATTR_FORK);
+}
+
+unsigned int
+xfs_create_space_res(
+ struct xfs_mount *mp,
+ unsigned int namelen)
+{
+ unsigned int ret;
+
+ ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen);
+ if (xfs_has_parent(mp))
+ ret += xfs_parent_calc_space_res(mp, namelen);
+
+ return ret;
+}
+
+unsigned int
+xfs_mkdir_space_res(
+ struct xfs_mount *mp,
+ unsigned int namelen)
+{
+ return xfs_create_space_res(mp, namelen);
+}
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index 9640fc232c14..6cda87153b38 100644
--- a/fs/xfs/libxfs/xfs_trans_space.h
+++ b/fs/xfs/libxfs/xfs_trans_space.h
@@ -80,8 +80,6 @@
/* This macro is not used - see inline code in xfs_attr_set */
#define XFS_ATTRSET_SPACE_RES(mp, v) \
(XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) + XFS_B_TO_FSB(mp, v))
-#define XFS_CREATE_SPACE_RES(mp,nl) \
- (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_DIOSTRAT_SPACE_RES(mp, v) \
(XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
#define XFS_GROWFS_SPACE_RES(mp) \
@@ -90,8 +88,6 @@
((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
#define XFS_LINK_SPACE_RES(mp,nl) \
XFS_DIRENTER_SPACE_RES(mp,nl)
-#define XFS_MKDIR_SPACE_RES(mp,nl) \
- (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_QM_DQALLOC_SPACE_RES(mp) \
(XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + \
XFS_DQUOT_CLUSTER_SIZE_FSB)
@@ -106,5 +102,10 @@
#define XFS_IFREE_SPACE_RES(mp) \
(xfs_has_finobt(mp) ? M_IGEO(mp)->inobt_maxlevels : 0)
+unsigned int xfs_parent_calc_space_res(struct xfs_mount *mp,
+ unsigned int namelen);
+
+unsigned int xfs_create_space_res(struct xfs_mount *mp, unsigned int namelen);
+unsigned int xfs_mkdir_space_res(struct xfs_mount *mp, unsigned int namelen);
#endif /* __XFS_TRANS_SPACE_H__ */
diff --git a/fs/xfs/scrub/tempfile.c b/fs/xfs/scrub/tempfile.c
index 6c3e338f1118..d6705d9933d7 100644
--- a/fs/xfs/scrub/tempfile.c
+++ b/fs/xfs/scrub/tempfile.c
@@ -71,7 +71,7 @@ xrep_tempfile_create(
return error;
if (is_dir) {
- resblks = XFS_MKDIR_SPACE_RES(mp, 0);
+ resblks = xfs_mkdir_space_res(mp, 0);
tres = &M_RES(mp)->tr_mkdir;
} else {
resblks = XFS_IALLOC_SPACE_RES(mp);
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index ba89b879e7d6..8e7e763345a6 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -40,6 +40,8 @@
#include "xfs_log_priv.h"
#include "xfs_health.h"
#include "xfs_pnfs.h"
+#include "xfs_parent.h"
+#include "xfs_xattr.h"
struct kmem_cache *xfs_inode_cache;
@@ -1018,7 +1020,7 @@ xfs_dir_hook_del(
int
xfs_create(
struct mnt_idmap *idmap,
- xfs_inode_t *dp,
+ struct xfs_inode *dp,
struct xfs_name *name,
umode_t mode,
dev_t rdev,
@@ -1030,7 +1032,7 @@ xfs_create(
struct xfs_inode *ip = NULL;
struct xfs_trans *tp = NULL;
int error;
- bool unlock_dp_on_error = false;
+ bool unlock_dp_on_error = false;
prid_t prid;
struct xfs_dquot *udqp = NULL;
struct xfs_dquot *gdqp = NULL;
@@ -1038,6 +1040,7 @@ xfs_create(
struct xfs_trans_res *tres;
uint resblks;
xfs_ino_t ino;
+ struct xfs_parent_defer *parent;
trace_xfs_create(dp, name);
@@ -1057,13 +1060,17 @@ xfs_create(
return error;
if (is_dir) {
- resblks = XFS_MKDIR_SPACE_RES(mp, name->len);
+ resblks = xfs_mkdir_space_res(mp, name->len);
tres = &M_RES(mp)->tr_mkdir;
} else {
- resblks = XFS_CREATE_SPACE_RES(mp, name->len);
+ resblks = xfs_create_space_res(mp, name->len);
tres = &M_RES(mp)->tr_create;
}
+ error = xfs_parent_start(mp, &parent);
+ if (error)
+ goto out_release_dquots;
+
/*
* Initially assume that the file does not exist and
* reserve the resources for that case. If that is not
@@ -1079,7 +1086,7 @@ xfs_create(
resblks, &tp);
}
if (error)
- goto out_release_dquots;
+ goto out_parent;
xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
unlock_dp_on_error = true;
@@ -1089,6 +1096,7 @@ xfs_create(
* entry pointing to them, but a directory also the "." entry
* pointing to itself.
*/
+ init_xattrs = init_xattrs || xfs_has_parent(mp);
error = xfs_dialloc(&tp, dp->i_ino, mode, &ino);
if (!error)
error = xfs_init_new_inode(idmap, tp, dp, ino, mode,
@@ -1122,6 +1130,16 @@ xfs_create(
xfs_bumplink(tp, dp);
}
+ /*
+ * If we have parent pointers, we need to add the attribute containing
+ * the parent information now.
+ */
+ if (parent) {
+ error = xfs_parent_add(tp, parent, dp, name, ip);
+ if (error)
+ goto out_trans_cancel;
+ }
+
/*
* Create ip with a reference from dp, and add '.' and '..' references
* if it's a directory.
@@ -1154,6 +1172,7 @@ xfs_create(
*ipp = ip;
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ xfs_parent_finish(mp, parent);
return 0;
out_trans_cancel:
@@ -1169,6 +1188,8 @@ xfs_create(
xfs_finish_inode_setup(ip);
xfs_irele(ip);
}
+ out_parent:
+ xfs_parent_finish(mp, parent);
out_release_dquots:
xfs_qm_dqrele(udqp);
xfs_qm_dqrele(gdqp);
@@ -1224,7 +1245,7 @@ xfs_create_tmpfile(
error = xfs_dialloc(&tp, dp->i_ino, mode, &ino);
if (!error)
error = xfs_init_new_inode(idmap, tp, dp, ino, mode,
- 0, 0, prid, false, &ip);
+ 0, 0, prid, xfs_has_parent(mp), &ip);
if (error)
goto out_trans_cancel;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 829662819e7f..85b62743364d 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -44,6 +44,7 @@
#include "xfs_dahash_test.h"
#include "scrub/rcbag_btree.h"
#include "xfs_swapext_item.h"
+#include "xfs_parent.h"
#include <linux/magic.h>
#include <linux/fs_context.h>
@@ -2157,8 +2158,16 @@ xfs_init_caches(void)
if (!xfs_sxi_cache)
goto out_destroy_sxd_cache;
+ xfs_parent_intent_cache = kmem_cache_create("xfs_parent_intent",
+ sizeof(struct xfs_parent_defer),
+ 0, 0, NULL);
+ if (!xfs_parent_intent_cache)
+ goto out_destroy_sxi_cache;
+
return 0;
+ out_destroy_sxi_cache:
+ kmem_cache_destroy(xfs_sxi_cache);
out_destroy_sxd_cache:
kmem_cache_destroy(xfs_sxd_cache);
out_destroy_iul_cache:
@@ -2219,6 +2228,7 @@ xfs_destroy_caches(void)
* destroy caches.
*/
rcu_barrier();
+ kmem_cache_destroy(xfs_parent_intent_cache);
kmem_cache_destroy(xfs_sxd_cache);
kmem_cache_destroy(xfs_sxi_cache);
kmem_cache_destroy(xfs_iunlink_cache);
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 5704fada042e..b4fa2663f8b6 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -27,7 +27,7 @@
* they must release the permission by calling xlog_drop_incompat_feat
* when they're done.
*/
-static inline int
+int
xfs_attr_grab_log_assist(
struct xfs_mount *mp)
{
@@ -61,7 +61,7 @@ xfs_attr_grab_log_assist(
return error;
}
-static inline void
+void
xfs_attr_rele_log_assist(
struct xfs_mount *mp)
{
diff --git a/fs/xfs/xfs_xattr.h b/fs/xfs/xfs_xattr.h
index 2b09133b1b9b..7e0a2f3bb7f8 100644
--- a/fs/xfs/xfs_xattr.h
+++ b/fs/xfs/xfs_xattr.h
@@ -7,6 +7,8 @@
#define __XFS_XATTR_H__
int xfs_attr_change(struct xfs_da_args *args);
+int xfs_attr_grab_log_assist(struct xfs_mount *mp);
+void xfs_attr_rele_log_assist(struct xfs_mount *mp);
extern const struct xattr_handler *xfs_xattr_handlers[];
