[PATCH v2 01/23] xfs: Add new name to attri/d

Andrey Albershteyn
2023-04-04T14:56:02Z

From: Allison Henderson <allison.henderson@oracle.com>

This patch adds two new fields to the atti/d. They are nname and
nnamelen. This will be used for parent pointer updates since a
rename operation may cause the parent pointer to update both the
name and value. So we need to carry both the new name as well as
the target name in the attri/d.

Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/libxfs/xfs_attr.c | 12 ++-
fs/xfs/libxfs/xfs_attr.h | 4 +-
fs/xfs/libxfs/xfs_da_btree.h | 2 +
fs/xfs/libxfs/xfs_log_format.h | 6 +-
fs/xfs/xfs_attr_item.c | 135 +++++++++++++++++++++++++++------
fs/xfs/xfs_attr_item.h | 1 +
6 files changed, 133 insertions(+), 27 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index e28d93d232de..b1dbed7655e8 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -423,6 +423,12 @@ xfs_attr_complete_op(
args->op_flags &= ~XFS_DA_OP_REPLACE;
if (do_replace) {
args->attr_filter &= ~XFS_ATTR_INCOMPLETE;
+ if (args->new_namelen > 0) {
+ args->name = args->new_name;
+ args->namelen = args->new_namelen;
+ args->hashval = xfs_da_hashname(args->name,
+ args->namelen);
+ }
return replace_state;
}
return XFS_DAS_DONE;
@@ -922,9 +928,13 @@ xfs_attr_defer_replace(
struct xfs_da_args *args)
{
struct xfs_attr_intent *new;
+ int op_flag;
int error = 0;

- error = xfs_attr_intent_init(args, XFS_ATTRI_OP_FLAGS_REPLACE, &new);
+ op_flag = args->new_namelen == 0 ? XFS_ATTRI_OP_FLAGS_REPLACE :
+ XFS_ATTRI_OP_FLAGS_NVREPLACE;
+
+ error = xfs_attr_intent_init(args, op_flag, &new);
if (error)
return error;

diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 81be9b3e4004..3e81f3f48560 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -510,8 +510,8 @@ struct xfs_attr_intent {
struct xfs_da_args *xattri_da_args;

/*
- * Shared buffer containing the attr name and value so that the logging
- * code can share large memory buffers between log items.
+ * Shared buffer containing the attr name, new name, and value so that
+ * the logging code can share large memory buffers between log items.
*/
struct xfs_attri_log_nameval *xattri_nameval;

diff --git a/fs/xfs/libxfs/xfs_da_btree.h b/fs/xfs/libxfs/xfs_da_btree.h
index ffa3df5b2893..a4b29827603f 100644
--- a/fs/xfs/libxfs/xfs_da_btree.h
+++ b/fs/xfs/libxfs/xfs_da_btree.h
@@ -55,7 +55,9 @@ enum xfs_dacmp {
typedef struct xfs_da_args {
struct xfs_da_geometry *geo; /* da block geometry */
const uint8_t *name; /* string (maybe not NULL terminated) */
+ const uint8_t *new_name; /* new attr name */
int namelen; /* length of string (maybe no NULL) */
+ int new_namelen; /* new attr name len */
uint8_t filetype; /* filetype of inode for directories */
void *value; /* set of bytes (maybe contain NULLs) */
int valuelen; /* length of value */
diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
index f13e0809dc63..ae9c99762a24 100644
--- a/fs/xfs/libxfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -117,7 +117,8 @@ struct xfs_unmount_log_format {
#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 30
+#define XLOG_REG_TYPE_ATTR_NNAME 31
+#define XLOG_REG_TYPE_MAX 31

/*
@@ -957,6 +958,7 @@ struct xfs_icreate_log {
#define XFS_ATTRI_OP_FLAGS_SET 1 /* Set the attribute */
#define XFS_ATTRI_OP_FLAGS_REMOVE 2 /* Remove the attribute */
#define XFS_ATTRI_OP_FLAGS_REPLACE 3 /* Replace the attribute */
+#define XFS_ATTRI_OP_FLAGS_NVREPLACE 4 /* Replace attr name and val */
#define XFS_ATTRI_OP_FLAGS_TYPE_MASK 0xFF /* Flags type mask */

/*
@@ -974,7 +976,7 @@ struct xfs_icreate_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 */
+ uint32_t alfi_nname_len; /* attr new name length */
uint64_t alfi_id; /* attri identifier */
uint64_t alfi_ino; /* the inode for this attr operation */
uint32_t alfi_op_flags; /* marks the op as a set or remove */
diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
index 2788a6f2edcd..95e9ecbb4a67 100644
--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -75,6 +75,8 @@ static inline struct xfs_attri_log_nameval *
xfs_attri_log_nameval_alloc(
const void *name,
unsigned int name_len,
+ const void *nname,
+ unsigned int nname_len,
const void *value,
unsigned int value_len)
{
@@ -85,15 +87,25 @@ xfs_attri_log_nameval_alloc(
* this. But kvmalloc() utterly sucks, so we use our own version.
*/
nv = xlog_kvmalloc(sizeof(struct xfs_attri_log_nameval) +
- name_len + value_len);
+ name_len + nname_len + value_len);

nv->name.i_addr = nv + 1;
nv->name.i_len = name_len;
nv->name.i_type = XLOG_REG_TYPE_ATTR_NAME;
memcpy(nv->name.i_addr, name, name_len);

+ if (nname_len) {
+ nv->nname.i_addr = nv->name.i_addr + name_len;
+ nv->nname.i_len = nname_len;
+ memcpy(nv->nname.i_addr, nname, nname_len);
+ } else {
+ nv->nname.i_addr = NULL;
+ nv->nname.i_len = 0;
+ }
+ nv->nname.i_type = XLOG_REG_TYPE_ATTR_NNAME;
+
if (value_len) {
- nv->value.i_addr = nv->name.i_addr + name_len;
+ nv->value.i_addr = nv->name.i_addr + nname_len + name_len;
nv->value.i_len = value_len;
memcpy(nv->value.i_addr, value, value_len);
} else {
@@ -147,11 +159,15 @@ xfs_attri_item_size(
*nbytes += sizeof(struct xfs_attri_log_format) +
xlog_calc_iovec_len(nv->name.i_len);

- if (!nv->value.i_len)
- return;
+ if (nv->nname.i_len) {
+ *nvecs += 1;
+ *nbytes += xlog_calc_iovec_len(nv->nname.i_len);
+ }

- *nvecs += 1;
- *nbytes += xlog_calc_iovec_len(nv->value.i_len);
+ if (nv->value.i_len) {
+ *nvecs += 1;
+ *nbytes += xlog_calc_iovec_len(nv->value.i_len);
+ }
}

/*
@@ -181,6 +197,9 @@ xfs_attri_item_format(
ASSERT(nv->name.i_len > 0);
attrip->attri_format.alfi_size++;

+ if (nv->nname.i_len > 0)
+ attrip->attri_format.alfi_size++;
+
if (nv->value.i_len > 0)
attrip->attri_format.alfi_size++;

@@ -188,6 +207,10 @@ xfs_attri_item_format(
&attrip->attri_format,
sizeof(struct xfs_attri_log_format));
xlog_copy_from_iovec(lv, &vecp, &nv->name);
+
+ if (nv->nname.i_len > 0)
+ xlog_copy_from_iovec(lv, &vecp, &nv->nname);
+
if (nv->value.i_len > 0)
xlog_copy_from_iovec(lv, &vecp, &nv->value);
}
@@ -374,6 +397,7 @@ xfs_attr_log_item(
attrp->alfi_op_flags = attr->xattri_op_flags;
attrp->alfi_value_len = attr->xattri_nameval->value.i_len;
attrp->alfi_name_len = attr->xattri_nameval->name.i_len;
+ attrp->alfi_nname_len = attr->xattri_nameval->nname.i_len;
ASSERT(!(attr->xattri_da_args->attr_filter & ~XFS_ATTRI_FILTER_MASK));
attrp->alfi_attr_filter = attr->xattri_da_args->attr_filter;
}
@@ -415,7 +439,8 @@ xfs_attr_create_intent(
* deferred work state structure.
*/
attr->xattri_nameval = xfs_attri_log_nameval_alloc(args->name,
- args->namelen, args->value, args->valuelen);
+ args->namelen, args->new_name,
+ args->new_namelen, args->value, args->valuelen);
}

attrip = xfs_attri_init(mp, attr->xattri_nameval);
@@ -503,7 +528,8 @@ xfs_attri_validate(
unsigned int op = attrp->alfi_op_flags &
XFS_ATTRI_OP_FLAGS_TYPE_MASK;

- if (attrp->__pad != 0)
+ if (attrp->alfi_op_flags != XFS_ATTRI_OP_FLAGS_NVREPLACE &&
+ attrp->alfi_nname_len != 0)
return false;

if (attrp->alfi_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK)
@@ -517,6 +543,7 @@ xfs_attri_validate(
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
case XFS_ATTRI_OP_FLAGS_REMOVE:
+ case XFS_ATTRI_OP_FLAGS_NVREPLACE:
break;
default:
return false;
@@ -526,9 +553,14 @@ xfs_attri_validate(
return false;

if ((attrp->alfi_name_len > XATTR_NAME_MAX) ||
+ (attrp->alfi_nname_len > XATTR_NAME_MAX) ||
(attrp->alfi_name_len == 0))
return false;

+ if (op == XFS_ATTRI_OP_FLAGS_REMOVE &&
+ attrp->alfi_value_len != 0)
+ return false;
+
return xfs_verify_ino(mp, attrp->alfi_ino);
}

@@ -589,6 +621,8 @@ xfs_attri_item_recover(
args->whichfork = XFS_ATTR_FORK;
args->name = nv->name.i_addr;
args->namelen = nv->name.i_len;
+ args->new_name = nv->nname.i_addr;
+ args->new_namelen = nv->nname.i_len;
args->hashval = xfs_da_hashname(args->name, args->namelen);
args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK;
args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
@@ -599,6 +633,7 @@ xfs_attri_item_recover(
switch (attr->xattri_op_flags) {
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
+ case XFS_ATTRI_OP_FLAGS_NVREPLACE:
args->value = nv->value.i_addr;
args->valuelen = nv->value.i_len;
args->total = xfs_attr_calc_size(args, &local);
@@ -688,6 +723,7 @@ xfs_attri_item_relog(
new_attrp->alfi_op_flags = old_attrp->alfi_op_flags;
new_attrp->alfi_value_len = old_attrp->alfi_value_len;
new_attrp->alfi_name_len = old_attrp->alfi_name_len;
+ new_attrp->alfi_nname_len = old_attrp->alfi_nname_len;
new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter;

xfs_trans_add_item(tp, &new_attrip->attri_item);
@@ -710,48 +746,102 @@ xlog_recover_attri_commit_pass2(
const void *attr_value = NULL;
const void *attr_name;
size_t len;
-
- attri_formatp = item->ri_buf[0].i_addr;
- attr_name = item->ri_buf[1].i_addr;
+ const void *attr_nname = NULL;
+ int op, i = 0;

/* Validate xfs_attri_log_format before the large memory allocation */
len = sizeof(struct xfs_attri_log_format);
- if (item->ri_buf[0].i_len != len) {
+ if (item->ri_buf[i].i_len != len) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
- item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
+ item->ri_buf[i].i_addr, item->ri_buf[i].i_len);
return -EFSCORRUPTED;
}

+ attri_formatp = item->ri_buf[i].i_addr;
if (!xfs_attri_validate(mp, attri_formatp)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
- item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
+ item->ri_buf[i].i_addr, item->ri_buf[i].i_len);
return -EFSCORRUPTED;
}

+ op = attri_formatp->alfi_op_flags & XFS_ATTRI_OP_FLAGS_TYPE_MASK;
+ switch (op) {
+ case XFS_ATTRI_OP_FLAGS_SET:
+ case XFS_ATTRI_OP_FLAGS_REPLACE:
+ if (item->ri_total != 3) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+ break;
+ case XFS_ATTRI_OP_FLAGS_REMOVE:
+ if (item->ri_total != 2) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+ break;
+ case XFS_ATTRI_OP_FLAGS_NVREPLACE:
+ if (item->ri_total != 4) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+ break;
+ default:
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+
+ i++;
/* Validate the attr name */
- if (item->ri_buf[1].i_len !=
+ if (item->ri_buf[i].i_len !=
xlog_calc_iovec_len(attri_formatp->alfi_name_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
- item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
+ attri_formatp, len);
return -EFSCORRUPTED;
}

+ attr_name = item->ri_buf[i].i_addr;
if (!xfs_attr_namecheck(attr_name, attri_formatp->alfi_name_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
- item->ri_buf[1].i_addr, item->ri_buf[1].i_len);
+ item->ri_buf[i].i_addr, item->ri_buf[i].i_len);
return -EFSCORRUPTED;
}

+ i++;
+ if (attri_formatp->alfi_nname_len) {
+ /* Validate the attr nname */
+ if (item->ri_buf[i].i_len !=
+ xlog_calc_iovec_len(attri_formatp->alfi_nname_len)) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ item->ri_buf[i].i_addr,
+ item->ri_buf[i].i_len);
+ return -EFSCORRUPTED;
+ }
+
+ attr_nname = item->ri_buf[i].i_addr;
+ if (!xfs_attr_namecheck(attr_nname,
+ attri_formatp->alfi_nname_len)) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ item->ri_buf[i].i_addr,
+ item->ri_buf[i].i_len);
+ return -EFSCORRUPTED;
+ }
+ i++;
+ }
+
+
/* Validate the attr value, if present */
if (attri_formatp->alfi_value_len != 0) {
- if (item->ri_buf[2].i_len != xlog_calc_iovec_len(attri_formatp->alfi_value_len)) {
+ if (item->ri_buf[i].i_len != xlog_calc_iovec_len(attri_formatp->alfi_value_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
- item->ri_buf[0].i_addr,
- item->ri_buf[0].i_len);
+ attri_formatp, len);
return -EFSCORRUPTED;
}

- attr_value = item->ri_buf[2].i_addr;
+ attr_value = item->ri_buf[i].i_addr;
}

/*
@@ -760,7 +850,8 @@ xlog_recover_attri_commit_pass2(
* reference.
*/
nv = xfs_attri_log_nameval_alloc(attr_name,
- attri_formatp->alfi_name_len, attr_value,
+ attri_formatp->alfi_name_len, attr_nname,
+ attri_formatp->alfi_nname_len, attr_value,
attri_formatp->alfi_value_len);

attrip = xfs_attri_init(mp, nv);
diff --git a/fs/xfs/xfs_attr_item.h b/fs/xfs/xfs_attr_item.h
index 3280a7930287..24d4968dd6cc 100644
--- a/fs/xfs/xfs_attr_item.h
+++ b/fs/xfs/xfs_attr_item.h
@@ -13,6 +13,7 @@ struct kmem_zone;

struct xfs_attri_log_nameval {
struct xfs_log_iovec name;
+ struct xfs_log_iovec nname;
struct xfs_log_iovec value;
refcount_t refcount;

--
2.38.4