On Sun, May 06, 2018 at 10:24:38AM -0700, Allison Henderson wrote:
This patch adds two new log item types for setting or
removing attributes as deferred operations. The
xfs_attri_log_item logs an intent to set or remove an
attribute. The corresponding xfs_attrd_log_item holds
a reference to the xfs_attri_log_item and is freed once
the transaction is done. Both log items use a generic
xfs_attr_log_format structure that contains the attribute
name, value, flags, inode, and an op_flag that indicates
if the operations is a set or remove.
At the moment, this feature will only be used by the parent
pointer patch set which uses attributes to store information
about an inodes parent.
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
---
fs/xfs/Makefile | 2 +
fs/xfs/libxfs/xfs_attr.c | 5 +-
fs/xfs/libxfs/xfs_attr.h | 26 +-
fs/xfs/libxfs/xfs_defer.h | 1 +
fs/xfs/libxfs/xfs_log_format.h | 44 +++-
fs/xfs/libxfs/xfs_types.h | 1 +
fs/xfs/xfs_attr_item.c | 530 +++++++++++++++++++++++++++++++++++++++++
fs/xfs/xfs_attr_item.h | 119 +++++++++
fs/xfs/xfs_log_recover.c | 122 ++++++++++
fs/xfs/xfs_super.c | 1 +
fs/xfs/xfs_trans.h | 13 +
fs/xfs/xfs_trans_attr.c | 283 ++++++++++++++++++++++
12 files changed, 1142 insertions(+), 5 deletions(-)
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 7ceb41a..d3c0004 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -107,6 +107,7 @@ xfs-y += xfs_log.o \
xfs_bmap_item.o \
xfs_buf_item.o \
xfs_extfree_item.o \
+ xfs_attr_item.o \
xfs_icreate_item.o \
xfs_inode_item.o \
xfs_refcount_item.o \
@@ -116,6 +117,7 @@ xfs-y += xfs_log.o \
xfs_trans_bmap.o \
xfs_trans_buf.o \
xfs_trans_extfree.o \
+ xfs_trans_attr.o \
xfs_trans_inode.o \
xfs_trans_refcount.o \
xfs_trans_rmap.o \
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 514f4f8..2f295ca 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -41,6 +41,7 @@
#include "xfs_quota.h"
#include "xfs_trans_space.h"
#include "xfs_trace.h"
+#include "xfs_attr_item.h"
/*
* xfs_attr.c
@@ -74,7 +75,7 @@ STATIC int xfs_attr_fillstate(xfs_da_state_t *state);
STATIC int xfs_attr_refillstate(xfs_da_state_t *state);
-STATIC int
+int
xfs_attr_args_init(
struct xfs_da_args *args,
struct xfs_inode *dp,
@@ -326,7 +327,7 @@ xfs_attr_remove_args(
/*
* Calculate how many blocks we need for the new attribute,
*/
-STATIC int
+int
xfs_attr_calc_size(
struct xfs_da_args *args,
int *local)
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index ef6b47e..33b33d3 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -18,6 +18,8 @@
#ifndef __XFS_ATTR_H__
#define __XFS_ATTR_H__
+#include "libxfs/xfs_defer.h"
+
struct xfs_inode;
struct xfs_da_args;
struct xfs_attr_list_context;
@@ -90,6 +92,26 @@ typedef struct attrlist_ent { /* data from attr_list() */
} attrlist_ent_t;
/*
+ * List of attrs to commit later.
+ */
+struct xfs_attr_item {
+ struct xfs_inode *xattri_ip;
+ uint32_t xattri_op_flags;
+ uint32_t xattri_value_len; /* length of value */
+ uint32_t xattri_name_len; /* length of name */
+ uint32_t xattri_flags; /* attr flags */
+ struct list_head xattri_list;
You could shave four bytes off this structure's size by sorting the
fields in decreasing size order (e.g. put the xattri_list first).
+
+ /*
+ * A byte array follows the header containing the file name and
+ * attribute value.
+ */
+};
+
+#define XFS_ATTR_ITEM_SIZEOF(namelen, valuelen) \
+ (sizeof(struct xfs_attr_item) + (namelen) + (valuelen))
+
+/*
* Given a pointer to the (char*) buffer containing the attr_list() result,
* and an index, return a pointer to the indicated attribute in the buffer.
*/
@@ -158,6 +180,8 @@ int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
int xfs_attr_remove_args(struct xfs_da_args *args, int flags, bool roll_trans);
int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
int flags, struct attrlist_cursor_kern *cursor);
-
+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);
#endif /* __XFS_ATTR_H__ */
diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h
index 045beac..11e1690 100644
--- a/fs/xfs/libxfs/xfs_defer.h
+++ b/fs/xfs/libxfs/xfs_defer.h
@@ -55,6 +55,7 @@ enum xfs_defer_ops_type {
XFS_DEFER_OPS_TYPE_REFCOUNT,
XFS_DEFER_OPS_TYPE_RMAP,
XFS_DEFER_OPS_TYPE_FREE,
+ XFS_DEFER_OPS_TYPE_ATTR,
XFS_DEFER_OPS_TYPE_MAX,
};
diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
index 349d9f8..291e5ff 100644
--- a/fs/xfs/libxfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -116,7 +116,12 @@ static inline uint xlog_get_cycle(char *ptr)
#define XLOG_REG_TYPE_CUD_FORMAT 24
#define XLOG_REG_TYPE_BUI_FORMAT 25
#define XLOG_REG_TYPE_BUD_FORMAT 26
-#define XLOG_REG_TYPE_MAX 26
+#define XLOG_REG_TYPE_ATTRI_FORMAT 27
+#define XLOG_REG_TYPE_ATTRD_FORMAT 28
+#define XLOG_REG_TYPE_ATTR_NAME 29
+#define XLOG_REG_TYPE_ATTR_VALUE 30
+#define XLOG_REG_TYPE_MAX 31
+
/*
* Flags to log operation header
@@ -239,6 +244,8 @@ typedef struct xfs_trans_header {
#define XFS_LI_CUD 0x1243
#define XFS_LI_BUI 0x1244 /* bmbt update intent */
#define XFS_LI_BUD 0x1245
+#define XFS_LI_ATTRI 0x1246 /* attr set/remove intent*/
+#define XFS_LI_ATTRD 0x1247 /* attr set/remove done */
#define XFS_LI_TYPE_DESC \
{ XFS_LI_EFI, "XFS_LI_EFI" }, \
@@ -254,7 +261,9 @@ typedef struct xfs_trans_header {
{ XFS_LI_CUI, "XFS_LI_CUI" }, \
{ XFS_LI_CUD, "XFS_LI_CUD" }, \
{ XFS_LI_BUI, "XFS_LI_BUI" }, \
- { XFS_LI_BUD, "XFS_LI_BUD" }
+ { XFS_LI_BUD, "XFS_LI_BUD" }, \
+ { XFS_LI_ATTRI, "XFS_LI_ATTRI" }, \
+ { XFS_LI_ATTRD, "XFS_LI_ATTRD" }
/*
* Inode Log Item Format definitions.
@@ -852,4 +861,35 @@ struct xfs_icreate_log {
__be32 icl_gen; /* inode generation number to use */
};
+/*
+ * Flags for deferred attribute operations.
+ * Upper bits are flags, lower byte is type code
+ */
+#define XFS_ATTR_OP_FLAGS_SET 1 /* Set the attribute */
+#define XFS_ATTR_OP_FLAGS_REMOVE 2 /* Remove the attribute */
+#define XFS_ATTR_OP_FLAGS_TYPE_MASK 0x0FF /* Flags type mask */
+
+/*
+ * This is the structure used to lay out an attr log item in the
+ * log.
+ */
+struct xfs_attri_log_format {
+ uint16_t alfi_type; /* attri log item type */
+ uint16_t alfi_size; /* size of this item */
+ uint32_t __pad; /* pad to 64 bit aligned */
+ uint64_t alfi_id; /* attri identifier */
+ xfs_ino_t alfi_ino; /* the inode for this attr operation */
+ uint32_t alfi_op_flags; /* marks the op as a set or remove */
+ uint32_t alfi_name_len; /* attr name length */
+ uint32_t alfi_value_len; /* attr value length */
+ uint32_t alfi_attr_flags;/* attr flags */
+};
+
+struct xfs_attrd_log_format {
+ uint16_t alfd_type; /* attrd log item type */
+ uint16_t alfd_size; /* size of this item */
+ uint32_t __pad; /* pad to 64 bit aligned */
+ uint64_t alfd_alf_id; /* id of corresponding attrd */
+};
The size of these log structures, all the other on-disk metadata
structures, and possibly the ioctl structures needs to be checked in
xfs_ondisk.h so that we don't repeat the AGFL padding mess.
+
#endif /* __XFS_LOG_FORMAT_H__ */
diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h
index 3c56069..2905ce3 100644
--- a/fs/xfs/libxfs/xfs_types.h
+++ b/fs/xfs/libxfs/xfs_types.h
@@ -23,6 +23,7 @@ typedef uint32_t prid_t; /* project ID */
typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */
typedef uint32_t xfs_agino_t; /* inode # within allocation grp */
typedef uint32_t xfs_extlen_t; /* extent length in blocks */
+typedef uint32_t xfs_attrlen_t; /* attr length */
typedef uint32_t xfs_agnumber_t; /* allocation group number */
typedef int32_t xfs_extnum_t; /* # of extents in a file */
typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */
diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
new file mode 100644
index 0000000..7e986e8
--- /dev/null
+++ b/fs/xfs/xfs_attr_item.c
@@ -0,0 +1,530 @@
+/*
+ * Copyright (c) 2017 Oracle, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation Inc.
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_bit.h"
+#include "xfs_mount.h"
+#include "xfs_trans.h"
+#include "xfs_trans_priv.h"
+#include "xfs_buf_item.h"
+#include "xfs_attr_item.h"
+#include "xfs_log.h"
+#include "xfs_btree.h"
+#include "xfs_rmap.h"
+#include "xfs_inode.h"
+#include "xfs_icache.h"
+
+static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip)
+{
+ return container_of(lip, struct xfs_attri_log_item, item);
+}
+
+void
+xfs_attri_item_free(
+ struct xfs_attri_log_item *attrip)
+{
+ kmem_free(attrip->item.li_lv_shadow);
+ kmem_free(attrip);
+}
+
+/*
+ * This returns the number of iovecs needed to log the given attri item.
+ * We only need 1 iovec for an attri item. It just logs the attr_log_format
+ * structure.
+ */
+static inline int
+xfs_attri_item_sizeof(
+ struct xfs_attri_log_item *attrip)
+{
+ return sizeof(struct xfs_attri_log_format);
+}
+
+STATIC void
+xfs_attri_item_size(
+ struct xfs_log_item *lip,
+ int *nvecs,
+ int *nbytes)
+{
+ struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
+
+ *nvecs += 1;
+ *nbytes += xfs_attri_item_sizeof(attrip);
+
+ if (attrip->name_len > 0) {
+ *nvecs += 1;
+ nbytes += ATTR_NVEC_SIZE(attrip->name_len);
+ }
+
+ if (attrip->value_len > 0) {
+ *nvecs += 1;
+ nbytes += ATTR_NVEC_SIZE(attrip->value_len);
+ }
+}
+
+/*
+ * This is called to fill in the vector of log iovecs for the
+ * given attri log item. We use only 1 iovec, and we point that
+ * at the attri_log_format structure embedded in the attri item.
+ * It is at this point that we assert that all of the attr
+ * slots in the attri item have been filled.
+ */
+STATIC void
+xfs_attri_item_format(
+ struct xfs_log_item *lip,
+ struct xfs_log_vec *lv)
+{
+ struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
+ struct xfs_log_iovec *vecp = NULL;
+
+ attrip->format.alfi_type = XFS_LI_ATTRI;
+ attrip->format.alfi_size = 1;
+
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT,
+ &attrip->format,
+ xfs_attri_item_sizeof(attrip));
+ if (attrip->name_len > 0)
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME,
+ attrip->name, ATTR_NVEC_SIZE(attrip->name_len));
+
+ if (attrip->value_len > 0)
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE,
+ attrip->value,
+ ATTR_NVEC_SIZE(attrip->value_len));
+}
+
+
+/*
+ * Pinning has no meaning for an attri item, so just return.
+ */
+STATIC void
+xfs_attri_item_pin(
+ struct xfs_log_item *lip)
+{
+}
+
+/*
+ * The unpin operation is the last place an ATTRI is manipulated in the log. It
+ * is either inserted in the AIL or aborted in the event of a log I/O error. In
+ * either case, the ATTRI transaction has been successfully committed to make it
+ * this far. Therefore, we expect whoever committed the ATTRI to either
+ * construct and commit the ATTRD or drop the ATTRD's reference in the event of
+ * error. Simply drop the log's ATTRI reference now that the log is done with
+ * it.
+ */
+STATIC void
+xfs_attri_item_unpin(
+ struct xfs_log_item *lip,
+ int remove)
+{
+ struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
+
+ xfs_attri_release(attrip);
+}
+
+/*
+ * attri items have no locking or pushing. However, since ATTRIs are pulled
+ * from the AIL when their corresponding ATTRDs are committed to disk, their
+ * situation is very similar to being pinned. Return XFS_ITEM_PINNED so that
+ * the caller will eventually flush the log. This should help in getting the
+ * ATTRI out of the AIL.
+ */
+STATIC uint
+xfs_attri_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+{
+ return XFS_ITEM_PINNED;
+}
+
+/*
+ * The ATTRI has been either committed or aborted if the transaction has been
+ * cancelled. If the transaction was cancelled, an ATTRD isn't going to be
+ * constructed and thus we free the ATTRI here directly.
+ */
+STATIC void
+xfs_attri_item_unlock(
+ struct xfs_log_item *lip)
+{
+ if (lip->li_flags & XFS_LI_ABORTED)
+ xfs_attri_release(ATTRI_ITEM(lip));
+}
+
+/*
+ * The ATTRI is logged only once and cannot be moved in the log, so simply
+ * return the lsn at which it's been logged.
+ */
+STATIC xfs_lsn_t
+xfs_attri_item_committed(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+ return lsn;
+}
+
+STATIC void
+xfs_attri_item_committing(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+}
+
+/*
+ * This is the ops vector shared by all attri log items.
+ */
+static const struct xfs_item_ops xfs_attri_item_ops = {
+ .iop_size = xfs_attri_item_size,
+ .iop_format = xfs_attri_item_format,
+ .iop_pin = xfs_attri_item_pin,
+ .iop_unpin = xfs_attri_item_unpin,
+ .iop_unlock = xfs_attri_item_unlock,
+ .iop_committed = xfs_attri_item_committed,
+ .iop_push = xfs_attri_item_push,
+ .iop_committing = xfs_attri_item_committing
+};
+
+
+/*
+ * Allocate and initialize an attri item
+ */
+struct xfs_attri_log_item *
+xfs_attri_init(
+ struct xfs_mount *mp)
+
+{
+ struct xfs_attri_log_item *attrip;
+ uint size;
+
+ size = (uint)(sizeof(struct xfs_attri_log_item));
+ attrip = kmem_zalloc(size, KM_SLEEP);
+
+ xfs_log_item_init(mp, &(attrip->item), XFS_LI_ATTRI,
+ &xfs_attri_item_ops);
+ attrip->format.alfi_id = (uintptr_t)(void *)attrip;
+ atomic_set(&attrip->refcount, 2);
+
+ return attrip;
+}
+
+/*
+ * Copy an attr format buffer from the given buf, and into the destination
+ * attr format structure.
+ */
+int
+xfs_attri_copy_format(struct xfs_log_iovec *buf,
+ struct xfs_attri_log_format *dst_attr_fmt)
+{
+ struct xfs_attri_log_format *src_attr_fmt = buf->i_addr;
+ uint len = sizeof(struct xfs_attri_log_format);
+
+ if (buf->i_len == len) {
+ memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len);
+ return 0;
+ }
+ return -EFSCORRUPTED;
+}
+
+/*
+ * Copy an attr format buffer from the given buf, and into the destination
+ * attr format structure.
+ */
+int
+xfs_attrd_copy_format(struct xfs_log_iovec *buf,
+ struct xfs_attrd_log_format *dst_attr_fmt)
+{
+ struct xfs_attrd_log_format *src_attr_fmt = buf->i_addr;
+ uint len = sizeof(struct xfs_attrd_log_format);
+
+ if (buf->i_len == len) {
+ memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len);
+ return 0;
+ }
+ return -EFSCORRUPTED;
+}
+
+/*
+ * Freeing the attrip requires that we remove it from the AIL if it has already
+ * been placed there. However, the ATTRI may not yet have been placed in the AIL
+ * when called by xfs_attri_release() from ATTRD processing due to the ordering of
+ * committed vs unpin operations in bulk insert operations. Hence the reference
+ * count to ensure only the last caller frees the ATTRI.
+ */
+void
+xfs_attri_release(
+ struct xfs_attri_log_item *attrip)
+{
+ ASSERT(atomic_read(&attrip->refcount) > 0);
+ if (atomic_dec_and_test(&attrip->refcount)) {
+ xfs_trans_ail_remove(&attrip->item, SHUTDOWN_LOG_IO_ERROR);
+ xfs_attri_item_free(attrip);
+ }
+}
+
+static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip)
+{
+ return container_of(lip, struct xfs_attrd_log_item, item);
+}
+
+STATIC void
+xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp)
+{
+ kmem_free(attrdp->item.li_lv_shadow);
+ kmem_free(attrdp);
+}
+
+/*
+ * This returns the number of iovecs needed to log the given attrd item.
+ * We only need 1 iovec for an attrd item. It just logs the attr_log_format
+ * structure.
+ */
+static inline int
+xfs_attrd_item_sizeof(
+ struct xfs_attrd_log_item *attrdp)
+{
+ return sizeof(struct xfs_attrd_log_format);
+}
+
+STATIC void
+xfs_attrd_item_size(
+ struct xfs_log_item *lip,
+ int *nvecs,
+ int *nbytes)
+{
+ struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
+ *nvecs += 1;
+ *nbytes += xfs_attrd_item_sizeof(attrdp);
+
+ if (attrdp->name_len > 0) {
+ *nvecs += 1;
+ nbytes += attrdp->name_len;
+ }
+
+ if (attrdp->value_len > 0) {
+ *nvecs += 1;
+ nbytes += attrdp->value_len;
+ }
+}
+
+/*
+ * This is called to fill in the vector of log iovecs for the
+ * given attrd log item. We use only 1 iovec, and we point that
+ * at the attr_log_format structure embedded in the attrd item.
+ * It is at this point that we assert that all of the attr
+ * slots in the attrd item have been filled.
+ */
+STATIC void
+xfs_attrd_item_format(
+ struct xfs_log_item *lip,
+ struct xfs_log_vec *lv)
+{
+ struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
+ struct xfs_log_iovec *vecp = NULL;
+
+ attrdp->format.alfd_type = XFS_LI_ATTRD;
+ attrdp->format.alfd_size = 1;
+
+ xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT,
+ &attrdp->format,
+ xfs_attrd_item_sizeof(attrdp));
+}
+
+/*
+ * Pinning has no meaning for an attrd item, so just return.
+ */
+STATIC void
+xfs_attrd_item_pin(
+ struct xfs_log_item *lip)
+{
+}
+
+/*
+ * Since pinning has no meaning for an attrd item, unpinning does
+ * not either.
+ */
+STATIC void
+xfs_attrd_item_unpin(
+ struct xfs_log_item *lip,
+ int remove)
+{
+}
+
+/*
+ * There isn't much you can do to push on an attrd item. It is simply stuck
+ * waiting for the log to be flushed to disk.
+ */
+STATIC uint
+xfs_attrd_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+{
+ return XFS_ITEM_PINNED;
+}
+
+/*
+ * The ATTRD is either committed or aborted if the transaction is cancelled. If
+ * the transaction is cancelled, drop our reference to the ATTRI and free the
+ * ATTRD.
+ */
+STATIC void
+xfs_attrd_item_unlock(
+ struct xfs_log_item *lip)
+{
+ struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
+
+ if (lip->li_flags & XFS_LI_ABORTED) {
+ xfs_attri_release(attrdp->attrip);
+ xfs_attrd_item_free(attrdp);
+ }
+}
+
+/*
+ * When the attrd item is committed to disk, all we need to do is delete our
+ * reference to our partner attri item and then free ourselves. Since we're
+ * freeing ourselves we must return -1 to keep the transaction code from
+ * further referencing this item.
+ */
+STATIC xfs_lsn_t
+xfs_attrd_item_committed(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+ struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
+
+ /*
+ * Drop the ATTRI reference regardless of whether the ATTRD has been
+ * aborted. Once the ATTRD transaction is constructed, it is the sole
+ * responsibility of the ATTRD to release the ATTRI (even if the ATTRI
+ * is aborted due to log I/O error).
+ */
+ xfs_attri_release(attrdp->attrip);
+ xfs_attrd_item_free(attrdp);
+
+ return (xfs_lsn_t)-1;
+}
+
+STATIC void
+xfs_attrd_item_committing(
+ struct xfs_log_item *lip,
+ xfs_lsn_t lsn)
+{
+}
+
+/*
+ * This is the ops vector shared by all attrd log items.
+ */
+static const struct xfs_item_ops xfs_attrd_item_ops = {
+ .iop_size = xfs_attrd_item_size,
+ .iop_format = xfs_attrd_item_format,
+ .iop_pin = xfs_attrd_item_pin,
+ .iop_unpin = xfs_attrd_item_unpin,
+ .iop_unlock = xfs_attrd_item_unlock,
+ .iop_committed = xfs_attrd_item_committed,
+ .iop_push = xfs_attrd_item_push,
+ .iop_committing = xfs_attrd_item_committing
+};
+
+/*
+ * Allocate and initialize an attrd item
+ */
+struct xfs_attrd_log_item *
+xfs_attrd_init(
+ struct xfs_mount *mp,
+ struct xfs_attri_log_item *attrip)
+
+{
+ struct xfs_attrd_log_item *attrdp;
+ uint size;
+
+ size = (uint)(sizeof(struct xfs_attrd_log_item));
+ attrdp = kmem_zalloc(size, KM_SLEEP);
+
+ xfs_log_item_init(mp, &attrdp->item, XFS_LI_ATTRD,
+ &xfs_attrd_item_ops);
+ attrdp->attrip = attrip;
+ attrdp->format.alfd_alf_id = attrip->format.alfi_id;
+
+ return attrdp;
+}
+
+/*
+ * Process an attr intent item that was recovered from
+ * the log. We need to delete the attr that it describes.
+ */
+int
+xfs_attri_recover(
+ struct xfs_mount *mp,
+ struct xfs_attri_log_item *attrip)
+{
+ struct xfs_inode *ip;
+ struct xfs_attrd_log_item *attrdp;
+ struct xfs_trans *tp;
+ int error = 0;
+ struct xfs_attri_log_format *attrp;
+
+ ASSERT(!test_bit(XFS_ATTRI_RECOVERED, &attrip->flags));
+
+ /*
+ * First check the validity of the attr described by the
+ * ATTRI. If any are bad, then assume that all are bad and
+ * just toss the ATTRI. A valid attr must have a name length,
+ * a value length, and either a "set" or "remove" op flag
+ */
+ attrp = &attrip->format;
+ if (attrp->alfi_value_len == 0 ||
+ attrp->alfi_name_len == 0 ||
+ !(attrp->alfi_op_flags == XFS_ATTR_OP_FLAGS_SET ||
+ attrp->alfi_op_flags == XFS_ATTR_OP_FLAGS_REMOVE) ) {
The name/value len should be checked to ensure it isn't too long.
+ /*
+ * This will pull the ATTRI from the AIL and
+ * free the memory associated with it.
+ */
+ set_bit(XFS_ATTRI_RECOVERED, &attrip->flags);
+ xfs_attri_release(attrip);
+ return -EIO;
+ }
+
+ error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
+ if (error)
+ return error;
+ attrdp = xfs_trans_get_attrd(tp, attrip);
+ attrp = &attrip->format;
+
+ error = xfs_iget(mp, tp, attrp->alfi_ino, 0, 0, &ip);
+ if (error)
+ return error;
+
+ error = xfs_trans_attr(tp, attrdp, ip,
+ attrp->alfi_op_flags,
+ attrp->alfi_attr_flags,
+ attrp->alfi_name_len,
+ attrp->alfi_value_len,
+ attrip->name,
+ attrip->value);
+ if (error)
+ goto abort_error;
+
+
+ set_bit(XFS_ATTRI_RECOVERED, &attrip->flags);
+ error = xfs_trans_commit(tp);
+ return error;
+
+abort_error:
+ xfs_trans_cancel(tp);
+ return error;
+}
diff --git a/fs/xfs/xfs_attr_item.h b/fs/xfs/xfs_attr_item.h
new file mode 100644
index 0000000..6ff07cc
--- /dev/null
+++ b/fs/xfs/xfs_attr_item.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2017 Oracle, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation Inc.
+ */
+#ifndef __XFS_ATTR_ITEM_H__
+#define __XFS_ATTR_ITEM_H__
+
+/* kernel only ATTRI/ATTRD definitions */
+
+struct xfs_mount;
+struct kmem_zone;
+
+/*
+ * Max number of attrs in fast allocation path.
+ */
+#define XFS_ATTRI_MAX_FAST_ATTRS 1
+
+
+/*
+ * Define ATTR flag bits. Manipulated by set/clear/test_bit operators.
+ */
+#define XFS_ATTRI_RECOVERED 1
+
+
+/* nvecs must be in multiples of 4 */
+#define ATTR_NVEC_SIZE(size) (size == sizeof(int32_t) ? sizeof(int32_t) : \
+ size + sizeof(int32_t) - \
+ (size % sizeof(int32_t)))
+
+/*
+ * This is the "attr intention" log item. It is used to log the fact
+ * that some attrs need to be processed. It is used in conjunction with the
+ * "attr done" log item described below.
+ *
+ * The ATTRI is reference counted so that it is not freed prior to both the
+ * ATTRI and ATTRD being committed and unpinned. This ensures the ATTRI is
+ * inserted into the AIL even in the event of out of order ATTRI/ATTRD
+ * processing. In other words, an ATTRI is born with two references:
+ *
+ * 1.) an ATTRI held reference to track ATTRI AIL insertion
+ * 2.) an ATTRD held reference to track ATTRD commit
+ *
+ * On allocation, both references are the responsibility of the caller. Once
+ * the ATTRI is added to and dirtied in a transaction, ownership of reference
+ * one transfers to the transaction. The reference is dropped once the ATTRI is
+ * inserted to the AIL or in the event of failure along the way (e.g., commit
+ * failure, log I/O error, etc.). Note that the caller remains responsible for
+ * the ATTRD reference under all circumstances to this point. The caller has no
+ * means to detect failure once the transaction is committed, however.
+ * Therefore, an ATTRD is required after this point, even in the event of
+ * unrelated failure.
+ *
+ * Once an ATTRD is allocated and dirtied in a transaction, reference two
+ * transfers to the transaction. The ATTRD reference is dropped once it reaches
+ * the unpin handler. Similar to the ATTRI, the reference also drops in the
+ * event of commit failure or log I/O errors. Note that the ATTRD is not
+ * inserted in the AIL, so at this point both the ATTI and ATTRD are freed.
+ */
+struct xfs_attri_log_item {
+ xfs_log_item_t item;
+ atomic_t refcount;
+ unsigned long flags; /* misc flags */
+ int name_len;
+ void *name;
+ int value_len;
+ void *value;
+ struct xfs_attri_log_format format;
+};
+
+/*
+ * This is the "attr done" log item. It is used to log
+ * the fact that some attrs earlier mentioned in an attri item
+ * have been freed.
+ */
+struct xfs_attrd_log_item {
+ struct xfs_log_item item;
+ struct xfs_attri_log_item *attrip;
+ uint next_attr;
+ int name_len;
+ void *name;
+ int value_len;
+ void *value;
+ struct xfs_attrd_log_format format;
+};
+
+/*
+ * Max number of attrs in fast allocation path.
+ */
+#define XFS_ATTRD_MAX_FAST_ATTRS 1
+
+extern struct kmem_zone *xfs_attri_zone;
+extern struct kmem_zone *xfs_attrd_zone;
+
+struct xfs_attri_log_item *xfs_attri_init(struct xfs_mount *mp);
+struct xfs_attrd_log_item *xfs_attrd_init(struct xfs_mount *mp,
+ struct xfs_attri_log_item *attrip);
+int xfs_attri_copy_format(struct xfs_log_iovec *buf,
+ struct xfs_attri_log_format *dst_attri_fmt);
+int xfs_attrd_copy_format(struct xfs_log_iovec *buf,
+ struct xfs_attrd_log_format *dst_attrd_fmt);
+void xfs_attri_item_free(struct xfs_attri_log_item *attrip);
+void xfs_attri_release(struct xfs_attri_log_item *attrip);
+
+int xfs_attri_recover(struct xfs_mount *mp,
+ struct xfs_attri_log_item *attrip);
+
+#endif /* __XFS_ATTR_ITEM_H__ */
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 2b2383f..696b6ff 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -34,6 +34,7 @@
#include "xfs_log_recover.h"
#include "xfs_inode_item.h"
#include "xfs_extfree_item.h"
+#include "xfs_attr_item.h"
#include "xfs_trans_priv.h"
#include "xfs_alloc.h"
#include "xfs_ialloc.h"
@@ -1967,6 +1968,8 @@ xlog_recover_reorder_trans(
case XFS_LI_CUD:
case XFS_LI_BUI:
case XFS_LI_BUD:
+ case XFS_LI_ATTRI:
+ case XFS_LI_ATTRD:
trace_xfs_log_recover_item_reorder_tail(log,
trans, item, pass);
list_move_tail(&item->ri_list, &inode_list);
@@ -3497,6 +3500,92 @@ xlog_recover_efd_pass2(
return 0;
}
+STATIC int
+xlog_recover_attri_pass2(
+ struct xlog *log,
+ struct xlog_recover_item *item,
+ xfs_lsn_t lsn)
+{
+ int error;
+ struct xfs_mount *mp = log->l_mp;
+ struct xfs_attri_log_item *attrip;
+ struct xfs_attr_log_format *attri_formatp;
+
+ attri_formatp = item->ri_buf[0].i_addr;
+
+ attrip = xfs_attri_init(mp);
+ error = xfs_attri_copy_format(&item->ri_buf[0], &attrip->format);
+ if (error) {
+ xfs_attri_item_free(attrip);
+ return error;
+ }
+
+ spin_lock(&log->l_ailp->ail_lock);
+ /*
+ * The ATTRI has two references. One for the ATTRD and one for ATTRI to
+ * ensure it makes it into the AIL. Insert the ATTRI into the AIL
+ * directly and drop the ATTRI reference. Note that
+ * xfs_trans_ail_update() drops the AIL lock.
+ */
+ xfs_trans_ail_update(log->l_ailp, &attrip->item, lsn);
+ xfs_attri_release(attrip);
+ return 0;
+}
+
+
+/*
+ * This routine is called when an ATTRD format structure is found in a committed
+ * transaction in the log. Its purpose is to cancel the corresponding ATTRI if
+ * it was still in the log. To do this it searches the AIL for the ATTRI with
+ * an id equal to that in the ATTRD format structure. If we find it we drop
+ * the ATTRD reference, which removes the ATTRI from the AIL and frees it.
+ */
+STATIC int
+xlog_recover_attrd_pass2(
+ struct xlog *log,
+ struct xlog_recover_item *item)
+{
+ struct xfs_attrd_log_format *attrd_formatp;
+ struct xfs_attri_log_item *attrip = NULL;
+ struct xfs_log_item *lip;
+ uint64_t attri_id;
+ struct xfs_ail_cursor cur;
+ struct xfs_ail *ailp = log->l_ailp;
+
+ attrd_formatp = item->ri_buf[0].i_addr;
+ ASSERT((item->ri_buf[0].i_len ==
+ (sizeof(struct xfs_attrd_log_format))));
+ attri_id = attrd_formatp->alfd_alf_id;
+
+ /*
+ * Search for the ATTRI with the id in the ATTRD format structure in the
+ * AIL.
+ */
+ spin_lock(&ailp->ail_lock);
+ lip = xfs_trans_ail_cursor_first(ailp, &cur, 0);
+ while (lip != NULL) {
+ if (lip->li_type == XFS_LI_ATTRI) {
+ attrip = (struct xfs_attri_log_item *)lip;
+ if (attrip->format.alfi_id == attri_id) {
+ /*
+ * Drop the ATTRD reference to the ATTRI. This
+ * removes the ATTRI from the AIL and frees it.
+ */
+ spin_unlock(&ailp->ail_lock);
+ xfs_attri_release(attrip);
+ spin_lock(&ailp->ail_lock);
+ break;
+ }
+ }
+ lip = xfs_trans_ail_cursor_next(ailp, &cur);
+ }
+
+ xfs_trans_ail_cursor_done(&cur);
+ spin_unlock(&ailp->ail_lock);
+
+ return 0;
+}
+
/*
* This routine is called to create an in-core extent rmap update
* item from the rui format structure which was logged on disk.
@@ -4116,6 +4205,10 @@ xlog_recover_commit_pass2(
return xlog_recover_efi_pass2(log, item, trans->r_lsn);
case XFS_LI_EFD:
return xlog_recover_efd_pass2(log, item);
+ case XFS_LI_ATTRI:
+ return xlog_recover_attri_pass2(log, item, trans->r_lsn);
+ case XFS_LI_ATTRD:
+ return xlog_recover_attrd_pass2(log, item);
case XFS_LI_RUI:
return xlog_recover_rui_pass2(log, item, trans->r_lsn);
case XFS_LI_RUD:
@@ -4677,6 +4770,31 @@ xlog_recover_cancel_efi(
spin_lock(&ailp->ail_lock);
}
+/* Recover the ATTRI if necessary. */
+STATIC int
+xlog_recover_process_attri(
+ struct xfs_mount *mp,
+ struct xfs_ail *ailp,
+ struct xfs_log_item *lip)
+{
+ struct xfs_attri_log_item *attrip;
+ int error;
+
+ /*
+ * Skip ATTRIs that we've already processed.
+ */
+ attrip = container_of(lip, struct xfs_attri_log_item, item);
+ if (test_bit(XFS_ATTRI_RECOVERED, &attrip->flags))
+ return 0;
+
+ spin_unlock(&ailp->ail_lock);
+ error = xfs_attri_recover(mp, attrip);
+ spin_lock(&ailp->ail_lock);
+
+ return error;
+}
+
+
/* Recover the RUI if necessary. */
STATIC int
xlog_recover_process_rui(
@@ -4920,6 +5038,10 @@ xlog_recover_process_intents(
case XFS_LI_EFI:
error = xlog_recover_process_efi(log->l_mp, ailp, lip);
break;
+ case XFS_LI_ATTRI:
+ error = xlog_recover_process_attri(log->l_mp,
+ ailp, lip);
Pass the &dfops into xlog_recover_process_attri -> xfs_attri_recover ->
xfs_trans_attr so that deferred items generated during recovery of other
deferred items are finished in the correct order. More information is
in commit 509955823cc9 ("xfs: log recovery should replay deferred ops in
order").
+ break;
case XFS_LI_RUI:
error = xlog_recover_process_rui(log->l_mp, ailp, lip);
break;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index d714240..dce3baf 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -2077,6 +2077,7 @@ init_xfs_fs(void)
xfs_rmap_update_init_defer_op();
xfs_refcount_update_init_defer_op();
xfs_bmap_update_init_defer_op();
+ xfs_attr_init_defer_op();
xfs_dir_startup();
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 9d542df..abd0a46 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -40,6 +40,9 @@ struct xfs_cud_log_item;
struct xfs_defer_ops;
struct xfs_bui_log_item;
struct xfs_bud_log_item;
+struct xfs_attrd_log_item;
+struct xfs_attri_log_item;
+
typedef struct xfs_log_item {
struct list_head li_ail; /* AIL pointers */
@@ -223,12 +226,22 @@ void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
void xfs_extent_free_init_defer_op(void);
+void xfs_attr_init_defer_op(void);
+
struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *,
struct xfs_efi_log_item *,
uint);
int xfs_trans_free_extent(struct xfs_trans *,
struct xfs_efd_log_item *, xfs_fsblock_t,
xfs_extlen_t, struct xfs_owner_info *);
+struct xfs_attrd_log_item *
+xfs_trans_get_attrd(struct xfs_trans *tp,
+ struct xfs_attri_log_item *attrip);
+int xfs_trans_attr(struct xfs_trans *tp, struct xfs_attrd_log_item *attrdp,
+ struct xfs_inode *ip, uint32_t attr_op_flags,
+ uint32_t flags, uint32_t name_len, uint32_t value_len,
+ char *name, char *value);
+
int xfs_trans_commit(struct xfs_trans *);
int xfs_trans_roll(struct xfs_trans **);
int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
diff --git a/fs/xfs/xfs_trans_attr.c b/fs/xfs/xfs_trans_attr.c
new file mode 100644
index 0000000..8e3a0a0
--- /dev/null
+++ b/fs/xfs/xfs_trans_attr.c
@@ -0,0 +1,283 @@
+/*
+ * Copyright (c) 2017, Oracle Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation Inc.
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_bit.h"
+#include "xfs_mount.h"
+#include "xfs_defer.h"
+#include "xfs_trans.h"
+#include "xfs_trans_priv.h"
+#include "xfs_attr_item.h"
+#include "xfs_alloc.h"
+#include "xfs_bmap.h"
+#include "xfs_trace.h"
+#include "libxfs/xfs_da_format.h"
+#include "xfs_da_btree.h"
+#include "xfs_attr.h"
+#include "xfs_inode.h"
+#include "xfs_icache.h"
+#include "xfs_quota.h"
+
+/*
+ * This routine is called to allocate an "extent free done"
+ * log item that will hold nextents worth of extents. The
+ * caller must use all nextents extents, because we are not
+ * flexible about this at all.
+ */
+struct xfs_attrd_log_item *
+xfs_trans_get_attrd(struct xfs_trans *tp,
+ struct xfs_attri_log_item *attrip)
+{
+ struct xfs_attrd_log_item *attrdp;
+
+ ASSERT(tp != NULL);
+
+ attrdp = xfs_attrd_init(tp->t_mountp, attrip);
+ ASSERT(attrdp != NULL);
+
+ /*
+ * Get a log_item_desc to point at the new item.
+ */
+ xfs_trans_add_item(tp, &attrdp->item);
+ return attrdp;
+}
+
+/*
+ * Delete an attr and log it to the ATTRD. Note that the transaction is marked
+ * dirty regardless of whether the attr delete succeeds or fails to support the
+ * ATTRI/ATTRD lifecycle rules.
+ */
+int
+xfs_trans_attr(
+ struct xfs_trans *tp,
+ struct xfs_attrd_log_item *attrdp,
+ struct xfs_inode *ip,
+ uint32_t op_flags,
+ uint32_t flags,
+ uint32_t name_len,
+ uint32_t value_len,
+ char *name,
+ char *value)
+{
+ int error;
+ int local;
+ struct xfs_da_args args;
+ struct xfs_defer_ops dfops;
Whitespace problems between type and name (the three lines leading up to
this)?
+
+ error = xfs_attr_args_init(&args, ip, name, flags);
+ if (error)
+ return error;
+
+ xfs_defer_init(&dfops, &firstblock);
See above comment about passing a dfops into this function to preserve
correct finishing order of intents created by intent recovery.
+ args.name = name;
+ args.namelen = name_len;
+ args.hashval = xfs_da_hashname(args.name, args.namelen);
+ args.value = value;
+ args.valuelen = value_len;
+ args.dfops = &dfops;
+ args.firstblock = &firstblock;
+ args.op_flags = XFS_DA_OP_OKNOENT;
+ args.total = xfs_attr_calc_size(&args, &local);
+ args.trans = tp;
+ ASSERT(local);
+
+ error = xfs_qm_dqattach_locked(ip, 0);
+ if (error)
+ return error;
+
+ switch (op_flags) {
+ case XFS_ATTR_OP_FLAGS_SET:
+ args.op_flags |= XFS_DA_OP_ADDNAME;
+ error = xfs_attr_set_args(&args, flags,
+ leaf_bp, false);
+ break;
+ case XFS_ATTR_OP_FLAGS_REMOVE:
+ ASSERT(XFS_IFORK_Q((ip)));
+ error = xfs_attr_remove_args(&args, flags, false);
+ break;
+ default:
+ error = -EFSCORRUPTED;
+ }
+
+ if (error) {
+ xfs_defer_cancel(&dfops);
+ if (leaf_bp)
+ xfs_trans_brelse(args.trans, leaf_bp);
Leading whitespace problem (tabs not spacs)...
+ }
+
+ /*
+ * Mark the transaction dirty, even on error. This ensures the
+ * transaction is aborted, which:
+ *
+ * 1.) releases the ATTRI and frees the ATTRD
+ * 2.) shuts down the filesystem
+ */
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ attrdp->item.li_desc->lid_flags |= XFS_LID_DIRTY;
+ attrdp->name = name;
+ attrdp->value = value;
+ attrdp->name_len = name_len;
+ attrdp->value_len = value_len;
+ attrdp->next_attr++;
+
+ return error;
+}
+
+static int
+xfs_attr_diff_items(
+ void *priv,
+ struct list_head *a,
+ struct list_head *b)
+{
+ return 0;
+}
+
+/* Get an ATTRI. */
+STATIC void *
+xfs_attr_create_intent(
+ struct xfs_trans *tp,
+ unsigned int count)
+{
+ struct xfs_attri_log_item *attrip;
+
+ ASSERT(tp != NULL);
+ ASSERT(count == 1);
+
+ attrip = xfs_attri_init(tp->t_mountp);
+ ASSERT(attrip != NULL);
+
+ /*
+ * Get a log_item_desc to point at the new item.
+ */
+ xfs_trans_add_item(tp, &attrip->item);
+ return attrip;
+}
+
+/* Log an attr to the intent item. */
+STATIC void
+xfs_attr_log_item(
+ struct xfs_trans *tp,
+ void *intent,
+ struct list_head *item)
+{
+ struct xfs_attri_log_item *attrip = intent;
+ struct xfs_attr_item *free;
+ struct xfs_attri_log_format *attrp;
+ char *name_value;
+
+ free = container_of(item, struct xfs_attr_item, xattri_list);
+ name_value = ((char *)free) + sizeof(struct xfs_attr_item);
+
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ attrip->item.li_desc->lid_flags |= XFS_LID_DIRTY;
+
+ attrp = &attrip->format;
+ attrp->alfi_ino = free->xattri_ip->i_ino;
+ attrp->alfi_op_flags = free->xattri_op_flags;
+ attrp->alfi_value_len = free->xattri_value_len;
+ attrp->alfi_name_len = free->xattri_name_len;
+ attrp->alfi_attr_flags = free->xattri_flags;
+
+ attrip->name = name_value;
+ attrip->value = &name_value[free->xattri_name_len];
+ attrip->name_len = free->xattri_name_len;
+ attrip->value_len = free->xattri_value_len;
+}
+
+/* Get an ATTRD so we can process all the attrs. */
+STATIC void *
+xfs_attr_create_done(
+ struct xfs_trans *tp,
+ void *intent,
+ unsigned int count)
+{
+ return xfs_trans_get_attrd(tp, intent);
+}
+
+/* Process an attr. */
+STATIC int
+xfs_attr_finish_item(
+ struct xfs_trans *tp,
+ struct xfs_defer_ops *dop,
This dop really needs to be passed into xfs_trans_attr because any
deferred ops created as a side effect of finishing this deferred op
(e.g. if the attr set has to map a block into the attr fork and we have
rmapbt=1) then the deferred rmap update has to be done in the correct
order and in the same context as the original defer_ops.
In other words we don't support nested defer_ops just like we don't
support nested transactions because that's a mess to sort out.
--D
