1
linux/fs/xfs/xfs_attr_item.c
Darrick J. Wong 97835e6866 xfs: fix xfs_init_attr_trans not handling explicit operation codes
When we were converting the attr code to use an explicit operation code
instead of keying off of attr->value being null, we forgot to change the
code that initializes the transaction reservation.  Split the function
into two helpers that handle the !remove and remove cases, then fix both
callsites to handle this correctly.

Fixes: c27411d4c6 ("xfs: make attr removal an explicit operation")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
2024-05-27 15:55:52 +05:30

1260 lines
34 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2022 Oracle. All Rights Reserved.
* Author: Allison Henderson <allison.henderson@oracle.com>
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_shared.h"
#include "xfs_mount.h"
#include "xfs_defer.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_bmap_btree.h"
#include "xfs_trans_priv.h"
#include "xfs_log.h"
#include "xfs_inode.h"
#include "xfs_da_format.h"
#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_attr_item.h"
#include "xfs_trace.h"
#include "xfs_trans_space.h"
#include "xfs_errortag.h"
#include "xfs_error.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
#include "xfs_parent.h"
struct kmem_cache *xfs_attri_cache;
struct kmem_cache *xfs_attrd_cache;
static const struct xfs_item_ops xfs_attri_item_ops;
static const struct xfs_item_ops xfs_attrd_item_ops;
static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_attri_log_item, attri_item);
}
/*
* Shared xattr name/value buffers for logged extended attribute operations
*
* When logging updates to extended attributes, we can create quite a few
* attribute log intent items for a single xattr update. To avoid cycling the
* memory allocator and memcpy overhead, the name (and value, for setxattr)
* are kept in a refcounted object that is shared across all related log items
* and the upper-level deferred work state structure. The shared buffer has
* a control structure, followed by the name, and then the value.
*/
static inline struct xfs_attri_log_nameval *
xfs_attri_log_nameval_get(
struct xfs_attri_log_nameval *nv)
{
if (!refcount_inc_not_zero(&nv->refcount))
return NULL;
return nv;
}
static inline void
xfs_attri_log_nameval_put(
struct xfs_attri_log_nameval *nv)
{
if (!nv)
return;
if (refcount_dec_and_test(&nv->refcount))
kvfree(nv);
}
static inline struct xfs_attri_log_nameval *
xfs_attri_log_nameval_alloc(
const void *name,
unsigned int name_len,
const void *new_name,
unsigned int new_name_len,
const void *value,
unsigned int value_len,
const void *new_value,
unsigned int new_value_len)
{
struct xfs_attri_log_nameval *nv;
/*
* This could be over 64kB in length, so we have to use kvmalloc() for
* this. But kvmalloc() utterly sucks, so we use our own version.
*/
nv = xlog_kvmalloc(sizeof(struct xfs_attri_log_nameval) +
name_len + new_name_len + value_len +
new_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 (new_name_len) {
nv->new_name.i_addr = nv->name.i_addr + name_len;
nv->new_name.i_len = new_name_len;
memcpy(nv->new_name.i_addr, new_name, new_name_len);
} else {
nv->new_name.i_addr = NULL;
nv->new_name.i_len = 0;
}
nv->new_name.i_type = XLOG_REG_TYPE_ATTR_NEWNAME;
if (value_len) {
nv->value.i_addr = nv->name.i_addr + name_len + new_name_len;
nv->value.i_len = value_len;
memcpy(nv->value.i_addr, value, value_len);
} else {
nv->value.i_addr = NULL;
nv->value.i_len = 0;
}
nv->value.i_type = XLOG_REG_TYPE_ATTR_VALUE;
if (new_value_len) {
nv->new_value.i_addr = nv->name.i_addr + name_len +
new_name_len + value_len;
nv->new_value.i_len = new_value_len;
memcpy(nv->new_value.i_addr, new_value, new_value_len);
} else {
nv->new_value.i_addr = NULL;
nv->new_value.i_len = 0;
}
nv->new_value.i_type = XLOG_REG_TYPE_ATTR_NEWVALUE;
refcount_set(&nv->refcount, 1);
return nv;
}
STATIC void
xfs_attri_item_free(
struct xfs_attri_log_item *attrip)
{
kvfree(attrip->attri_item.li_lv_shadow);
xfs_attri_log_nameval_put(attrip->attri_nameval);
kmem_cache_free(xfs_attri_cache, attrip);
}
/*
* 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.
*/
STATIC void
xfs_attri_release(
struct xfs_attri_log_item *attrip)
{
ASSERT(atomic_read(&attrip->attri_refcount) > 0);
if (!atomic_dec_and_test(&attrip->attri_refcount))
return;
xfs_trans_ail_delete(&attrip->attri_item, 0);
xfs_attri_item_free(attrip);
}
STATIC void
xfs_attri_item_size(
struct xfs_log_item *lip,
int *nvecs,
int *nbytes)
{
struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
*nvecs += 2;
*nbytes += sizeof(struct xfs_attri_log_format) +
xlog_calc_iovec_len(nv->name.i_len);
if (nv->new_name.i_len) {
*nvecs += 1;
*nbytes += xlog_calc_iovec_len(nv->new_name.i_len);
}
if (nv->value.i_len) {
*nvecs += 1;
*nbytes += xlog_calc_iovec_len(nv->value.i_len);
}
if (nv->new_value.i_len) {
*nvecs += 1;
*nbytes += xlog_calc_iovec_len(nv->new_value.i_len);
}
}
/*
* This is called to fill in the log iovecs for the given attri log
* item. We use 1 iovec for the attri_format_item, 1 for the name, and
* another for the value if it is present
*/
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;
struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
attrip->attri_format.alfi_type = XFS_LI_ATTRI;
attrip->attri_format.alfi_size = 1;
/*
* This size accounting must be done before copying the attrip into the
* iovec. If we do it after, the wrong size will be recorded to the log
* and we trip across assertion checks for bad region sizes later during
* the log recovery.
*/
ASSERT(nv->name.i_len > 0);
attrip->attri_format.alfi_size++;
if (nv->new_name.i_len > 0)
attrip->attri_format.alfi_size++;
if (nv->value.i_len > 0)
attrip->attri_format.alfi_size++;
if (nv->new_value.i_len > 0)
attrip->attri_format.alfi_size++;
xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT,
&attrip->attri_format,
sizeof(struct xfs_attri_log_format));
xlog_copy_from_iovec(lv, &vecp, &nv->name);
if (nv->new_name.i_len > 0)
xlog_copy_from_iovec(lv, &vecp, &nv->new_name);
if (nv->value.i_len > 0)
xlog_copy_from_iovec(lv, &vecp, &nv->value);
if (nv->new_value.i_len > 0)
xlog_copy_from_iovec(lv, &vecp, &nv->new_value);
}
/*
* 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)
{
xfs_attri_release(ATTRI_ITEM(lip));
}
STATIC void
xfs_attri_item_release(
struct xfs_log_item *lip)
{
xfs_attri_release(ATTRI_ITEM(lip));
}
/*
* Allocate and initialize an attri item. Caller may allocate an additional
* trailing buffer for name and value
*/
STATIC struct xfs_attri_log_item *
xfs_attri_init(
struct xfs_mount *mp,
struct xfs_attri_log_nameval *nv)
{
struct xfs_attri_log_item *attrip;
attrip = kmem_cache_zalloc(xfs_attri_cache, GFP_KERNEL | __GFP_NOFAIL);
/*
* Grab an extra reference to the name/value buffer for this log item.
* The caller retains its own reference!
*/
attrip->attri_nameval = xfs_attri_log_nameval_get(nv);
ASSERT(attrip->attri_nameval);
xfs_log_item_init(mp, &attrip->attri_item, XFS_LI_ATTRI,
&xfs_attri_item_ops);
attrip->attri_format.alfi_id = (uintptr_t)(void *)attrip;
atomic_set(&attrip->attri_refcount, 2);
return attrip;
}
static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_attrd_log_item, attrd_item);
}
STATIC void
xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp)
{
kvfree(attrdp->attrd_item.li_lv_shadow);
kmem_cache_free(xfs_attrd_cache, attrdp);
}
STATIC void
xfs_attrd_item_size(
struct xfs_log_item *lip,
int *nvecs,
int *nbytes)
{
*nvecs += 1;
*nbytes += sizeof(struct xfs_attrd_log_format);
}
/*
* This is called to fill in the log iovecs for the given attrd log item. We use
* only 1 iovec for the attrd_format, and we point that at the attr_log_format
* structure embedded in the attrd item.
*/
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->attrd_format.alfd_type = XFS_LI_ATTRD;
attrdp->attrd_format.alfd_size = 1;
xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT,
&attrdp->attrd_format,
sizeof(struct xfs_attrd_log_format));
}
/*
* The ATTRD is either committed or aborted if the transaction is canceled. If
* the transaction is canceled, drop our reference to the ATTRI and free the
* ATTRD.
*/
STATIC void
xfs_attrd_item_release(
struct xfs_log_item *lip)
{
struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip);
xfs_attri_release(attrdp->attrd_attrip);
xfs_attrd_item_free(attrdp);
}
static struct xfs_log_item *
xfs_attrd_item_intent(
struct xfs_log_item *lip)
{
return &ATTRD_ITEM(lip)->attrd_attrip->attri_item;
}
static inline unsigned int
xfs_attr_log_item_op(const struct xfs_attri_log_format *attrp)
{
return attrp->alfi_op_flags & XFS_ATTRI_OP_FLAGS_TYPE_MASK;
}
/* Log an attr to the intent item. */
STATIC void
xfs_attr_log_item(
struct xfs_trans *tp,
struct xfs_attri_log_item *attrip,
const struct xfs_attr_intent *attr)
{
struct xfs_attri_log_format *attrp;
struct xfs_attri_log_nameval *nv = attr->xattri_nameval;
struct xfs_da_args *args = attr->xattri_da_args;
/*
* At this point the xfs_attr_intent has been constructed, and we've
* created the log intent. Fill in the attri log item and log format
* structure with fields from this xfs_attr_intent
*/
attrp = &attrip->attri_format;
attrp->alfi_ino = args->dp->i_ino;
ASSERT(!(attr->xattri_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK));
attrp->alfi_op_flags = attr->xattri_op_flags;
attrp->alfi_value_len = nv->value.i_len;
switch (xfs_attr_log_item_op(attrp)) {
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
ASSERT(nv->value.i_len == nv->new_value.i_len);
attrp->alfi_igen = VFS_I(args->dp)->i_generation;
attrp->alfi_old_name_len = nv->name.i_len;
attrp->alfi_new_name_len = nv->new_name.i_len;
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
attrp->alfi_igen = VFS_I(args->dp)->i_generation;
fallthrough;
default:
attrp->alfi_name_len = nv->name.i_len;
break;
}
ASSERT(!(args->attr_filter & ~XFS_ATTRI_FILTER_MASK));
attrp->alfi_attr_filter = args->attr_filter;
}
/* Get an ATTRI. */
static struct xfs_log_item *
xfs_attr_create_intent(
struct xfs_trans *tp,
struct list_head *items,
unsigned int count,
bool sort)
{
struct xfs_mount *mp = tp->t_mountp;
struct xfs_attri_log_item *attrip;
struct xfs_attr_intent *attr;
struct xfs_da_args *args;
ASSERT(count == 1);
/*
* Each attr item only performs one attribute operation at a time, so
* this is a list of one
*/
attr = list_first_entry_or_null(items, struct xfs_attr_intent,
xattri_list);
args = attr->xattri_da_args;
if (!(args->op_flags & XFS_DA_OP_LOGGED))
return NULL;
/*
* Create a buffer to store the attribute name and value. This buffer
* will be shared between the higher level deferred xattr work state
* and the lower level xattr log items.
*/
if (!attr->xattri_nameval) {
/*
* Transfer our reference to the name/value buffer to the
* deferred work state structure.
*/
attr->xattri_nameval = xfs_attri_log_nameval_alloc(
args->name, args->namelen,
args->new_name, args->new_namelen,
args->value, args->valuelen,
args->new_value, args->new_valuelen);
}
attrip = xfs_attri_init(mp, attr->xattri_nameval);
xfs_attr_log_item(tp, attrip, attr);
return &attrip->attri_item;
}
static inline void
xfs_attr_free_item(
struct xfs_attr_intent *attr)
{
if (attr->xattri_da_state)
xfs_da_state_free(attr->xattri_da_state);
xfs_attri_log_nameval_put(attr->xattri_nameval);
if (attr->xattri_da_args->op_flags & XFS_DA_OP_RECOVERY)
kfree(attr);
else
kmem_cache_free(xfs_attr_intent_cache, attr);
}
static inline struct xfs_attr_intent *attri_entry(const struct list_head *e)
{
return list_entry(e, struct xfs_attr_intent, xattri_list);
}
/* Process an attr. */
STATIC int
xfs_attr_finish_item(
struct xfs_trans *tp,
struct xfs_log_item *done,
struct list_head *item,
struct xfs_btree_cur **state)
{
struct xfs_attr_intent *attr = attri_entry(item);
struct xfs_da_args *args;
int error;
args = attr->xattri_da_args;
/* Reset trans after EAGAIN cycle since the transaction is new */
args->trans = tp;
if (XFS_TEST_ERROR(false, args->dp->i_mount, XFS_ERRTAG_LARP)) {
error = -EIO;
goto out;
}
/* If an attr removal is trivially complete, we're done. */
if (attr->xattri_op_flags == XFS_ATTRI_OP_FLAGS_REMOVE &&
!xfs_inode_hasattr(args->dp)) {
error = 0;
goto out;
}
error = xfs_attr_set_iter(attr);
if (!error && attr->xattri_dela_state != XFS_DAS_DONE)
return -EAGAIN;
out:
xfs_attr_free_item(attr);
return error;
}
/* Abort all pending ATTRs. */
STATIC void
xfs_attr_abort_intent(
struct xfs_log_item *intent)
{
xfs_attri_release(ATTRI_ITEM(intent));
}
/* Cancel an attr */
STATIC void
xfs_attr_cancel_item(
struct list_head *item)
{
struct xfs_attr_intent *attr = attri_entry(item);
xfs_attr_free_item(attr);
}
STATIC bool
xfs_attri_item_match(
struct xfs_log_item *lip,
uint64_t intent_id)
{
return ATTRI_ITEM(lip)->attri_format.alfi_id == intent_id;
}
static inline bool
xfs_attri_validate_namelen(unsigned int namelen)
{
return namelen > 0 && namelen <= XATTR_NAME_MAX;
}
/* Is this recovered ATTRI format ok? */
static inline bool
xfs_attri_validate(
struct xfs_mount *mp,
struct xfs_attri_log_format *attrp)
{
unsigned int op = xfs_attr_log_item_op(attrp);
if (attrp->alfi_op_flags & ~XFS_ATTRI_OP_FLAGS_TYPE_MASK)
return false;
if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK)
return false;
if (!xfs_attr_check_namespace(attrp->alfi_attr_filter &
XFS_ATTR_NSP_ONDISK_MASK))
return false;
switch (op) {
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
if (!xfs_has_parent(mp))
return false;
if (attrp->alfi_value_len != sizeof(struct xfs_parent_rec))
return false;
if (!xfs_attri_validate_namelen(attrp->alfi_name_len))
return false;
if (!(attrp->alfi_attr_filter & XFS_ATTR_PARENT))
return false;
break;
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
if (!xfs_is_using_logged_xattrs(mp))
return false;
if (attrp->alfi_value_len > XATTR_SIZE_MAX)
return false;
if (!xfs_attri_validate_namelen(attrp->alfi_name_len))
return false;
break;
case XFS_ATTRI_OP_FLAGS_REMOVE:
if (!xfs_is_using_logged_xattrs(mp))
return false;
if (attrp->alfi_value_len != 0)
return false;
if (!xfs_attri_validate_namelen(attrp->alfi_name_len))
return false;
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
if (!xfs_has_parent(mp))
return false;
if (!xfs_attri_validate_namelen(attrp->alfi_old_name_len))
return false;
if (!xfs_attri_validate_namelen(attrp->alfi_new_name_len))
return false;
if (attrp->alfi_value_len != sizeof(struct xfs_parent_rec))
return false;
if (!(attrp->alfi_attr_filter & XFS_ATTR_PARENT))
return false;
break;
default:
return false;
}
return xfs_verify_ino(mp, attrp->alfi_ino);
}
static int
xfs_attri_iread_extents(
struct xfs_inode *ip)
{
struct xfs_trans *tp;
int error;
error = xfs_trans_alloc_empty(ip->i_mount, &tp);
if (error)
return error;
xfs_ilock(ip, XFS_ILOCK_EXCL);
error = xfs_iread_extents(tp, ip, XFS_ATTR_FORK);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_trans_cancel(tp);
return error;
}
static inline struct xfs_attr_intent *
xfs_attri_recover_work(
struct xfs_mount *mp,
struct xfs_defer_pending *dfp,
struct xfs_attri_log_format *attrp,
struct xfs_inode **ipp,
struct xfs_attri_log_nameval *nv)
{
struct xfs_attr_intent *attr;
struct xfs_da_args *args;
struct xfs_inode *ip;
int local;
int error;
/*
* Parent pointer attr items record the generation but regular logged
* xattrs do not; select the right iget function.
*/
switch (xfs_attr_log_item_op(attrp)) {
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
error = xlog_recover_iget_handle(mp, attrp->alfi_ino,
attrp->alfi_igen, &ip);
break;
default:
error = xlog_recover_iget(mp, attrp->alfi_ino, &ip);
break;
}
if (error) {
xfs_irele(ip);
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, attrp,
sizeof(*attrp));
return ERR_PTR(-EFSCORRUPTED);
}
if (xfs_inode_has_attr_fork(ip)) {
error = xfs_attri_iread_extents(ip);
if (error) {
xfs_irele(ip);
return ERR_PTR(error);
}
}
attr = kzalloc(sizeof(struct xfs_attr_intent) +
sizeof(struct xfs_da_args), GFP_KERNEL | __GFP_NOFAIL);
args = (struct xfs_da_args *)(attr + 1);
attr->xattri_da_args = args;
attr->xattri_op_flags = xfs_attr_log_item_op(attrp);
/*
* We're reconstructing the deferred work state structure from the
* recovered log item. Grab a reference to the name/value buffer and
* attach it to the new work state.
*/
attr->xattri_nameval = xfs_attri_log_nameval_get(nv);
ASSERT(attr->xattri_nameval);
args->dp = ip;
args->geo = mp->m_attr_geo;
args->whichfork = XFS_ATTR_FORK;
args->name = nv->name.i_addr;
args->namelen = nv->name.i_len;
args->new_name = nv->new_name.i_addr;
args->new_namelen = nv->new_name.i_len;
args->value = nv->value.i_addr;
args->valuelen = nv->value.i_len;
args->new_value = nv->new_value.i_addr;
args->new_valuelen = nv->new_value.i_len;
args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK;
args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT |
XFS_DA_OP_LOGGED;
args->owner = args->dp->i_ino;
xfs_attr_sethash(args);
switch (xfs_attr_intent_op(attr)) {
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
args->total = xfs_attr_calc_size(args, &local);
if (xfs_inode_hasattr(args->dp))
attr->xattri_dela_state = xfs_attr_init_replace_state(args);
else
attr->xattri_dela_state = xfs_attr_init_add_state(args);
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
case XFS_ATTRI_OP_FLAGS_REMOVE:
attr->xattri_dela_state = xfs_attr_init_remove_state(args);
break;
}
xfs_defer_add_item(dfp, &attr->xattri_list);
*ipp = ip;
return attr;
}
/*
* Process an attr intent item that was recovered from the log. We need to
* delete the attr that it describes.
*/
STATIC int
xfs_attr_recover_work(
struct xfs_defer_pending *dfp,
struct list_head *capture_list)
{
struct xfs_log_item *lip = dfp->dfp_intent;
struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip);
struct xfs_attr_intent *attr;
struct xfs_mount *mp = lip->li_log->l_mp;
struct xfs_inode *ip;
struct xfs_da_args *args;
struct xfs_trans *tp;
struct xfs_trans_res resv;
struct xfs_attri_log_format *attrp;
struct xfs_attri_log_nameval *nv = attrip->attri_nameval;
int error;
unsigned int total = 0;
/*
* 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.
*/
attrp = &attrip->attri_format;
if (!xfs_attri_validate(mp, attrp) ||
!xfs_attr_namecheck(attrp->alfi_attr_filter, nv->name.i_addr,
nv->name.i_len))
return -EFSCORRUPTED;
attr = xfs_attri_recover_work(mp, dfp, attrp, &ip, nv);
if (IS_ERR(attr))
return PTR_ERR(attr);
args = attr->xattri_da_args;
switch (xfs_attr_intent_op(attr)) {
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
resv = xfs_attr_set_resv(args);
total = args->total;
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
case XFS_ATTRI_OP_FLAGS_REMOVE:
resv = M_RES(mp)->tr_attrrm;
total = XFS_ATTRRM_SPACE_RES(mp);
break;
}
resv = xlog_recover_resv(&resv);
error = xfs_trans_alloc(mp, &resv, total, 0, XFS_TRANS_RESERVE, &tp);
if (error)
return error;
args->trans = tp;
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
error = xlog_recover_finish_intent(tp, dfp);
if (error == -EFSCORRUPTED)
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
&attrip->attri_format,
sizeof(attrip->attri_format));
if (error)
goto out_cancel;
error = xfs_defer_ops_capture_and_commit(tp, capture_list);
out_unlock:
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_irele(ip);
return error;
out_cancel:
xfs_trans_cancel(tp);
goto out_unlock;
}
/* Re-log an intent item to push the log tail forward. */
static struct xfs_log_item *
xfs_attr_relog_intent(
struct xfs_trans *tp,
struct xfs_log_item *intent,
struct xfs_log_item *done_item)
{
struct xfs_attri_log_item *old_attrip;
struct xfs_attri_log_item *new_attrip;
struct xfs_attri_log_format *new_attrp;
struct xfs_attri_log_format *old_attrp;
old_attrip = ATTRI_ITEM(intent);
old_attrp = &old_attrip->attri_format;
/*
* Create a new log item that shares the same name/value buffer as the
* old log item.
*/
new_attrip = xfs_attri_init(tp->t_mountp, old_attrip->attri_nameval);
new_attrp = &new_attrip->attri_format;
new_attrp->alfi_ino = old_attrp->alfi_ino;
new_attrp->alfi_igen = old_attrp->alfi_igen;
new_attrp->alfi_op_flags = old_attrp->alfi_op_flags;
new_attrp->alfi_value_len = old_attrp->alfi_value_len;
switch (xfs_attr_log_item_op(old_attrp)) {
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
new_attrp->alfi_new_name_len = old_attrp->alfi_new_name_len;
new_attrp->alfi_old_name_len = old_attrp->alfi_old_name_len;
break;
default:
new_attrp->alfi_name_len = old_attrp->alfi_name_len;
break;
}
new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter;
return &new_attrip->attri_item;
}
/* Get an ATTRD so we can process all the attrs. */
static struct xfs_log_item *
xfs_attr_create_done(
struct xfs_trans *tp,
struct xfs_log_item *intent,
unsigned int count)
{
struct xfs_attri_log_item *attrip;
struct xfs_attrd_log_item *attrdp;
attrip = ATTRI_ITEM(intent);
attrdp = kmem_cache_zalloc(xfs_attrd_cache, GFP_KERNEL | __GFP_NOFAIL);
xfs_log_item_init(tp->t_mountp, &attrdp->attrd_item, XFS_LI_ATTRD,
&xfs_attrd_item_ops);
attrdp->attrd_attrip = attrip;
attrdp->attrd_format.alfd_alf_id = attrip->attri_format.alfi_id;
return &attrdp->attrd_item;
}
void
xfs_attr_defer_add(
struct xfs_da_args *args,
enum xfs_attr_defer_op op)
{
struct xfs_attr_intent *new;
unsigned int log_op = 0;
bool is_pptr = args->attr_filter & XFS_ATTR_PARENT;
if (is_pptr) {
ASSERT(xfs_has_parent(args->dp->i_mount));
ASSERT((args->attr_filter & ~XFS_ATTR_PARENT) == 0);
ASSERT(args->op_flags & XFS_DA_OP_LOGGED);
ASSERT(args->valuelen == sizeof(struct xfs_parent_rec));
}
new = kmem_cache_zalloc(xfs_attr_intent_cache,
GFP_NOFS | __GFP_NOFAIL);
new->xattri_da_args = args;
/* Compute log operation from the higher level op and namespace. */
switch (op) {
case XFS_ATTR_DEFER_SET:
if (is_pptr)
log_op = XFS_ATTRI_OP_FLAGS_PPTR_SET;
else
log_op = XFS_ATTRI_OP_FLAGS_SET;
break;
case XFS_ATTR_DEFER_REPLACE:
if (is_pptr)
log_op = XFS_ATTRI_OP_FLAGS_PPTR_REPLACE;
else
log_op = XFS_ATTRI_OP_FLAGS_REPLACE;
break;
case XFS_ATTR_DEFER_REMOVE:
if (is_pptr)
log_op = XFS_ATTRI_OP_FLAGS_PPTR_REMOVE;
else
log_op = XFS_ATTRI_OP_FLAGS_REMOVE;
break;
default:
ASSERT(0);
break;
}
new->xattri_op_flags = log_op;
/* Set up initial attr operation state. */
switch (log_op) {
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
case XFS_ATTRI_OP_FLAGS_SET:
new->xattri_dela_state = xfs_attr_init_add_state(args);
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
ASSERT(args->new_valuelen == args->valuelen);
new->xattri_dela_state = xfs_attr_init_replace_state(args);
break;
case XFS_ATTRI_OP_FLAGS_REPLACE:
new->xattri_dela_state = xfs_attr_init_replace_state(args);
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
case XFS_ATTRI_OP_FLAGS_REMOVE:
new->xattri_dela_state = xfs_attr_init_remove_state(args);
break;
}
xfs_defer_add(args->trans, &new->xattri_list, &xfs_attr_defer_type);
trace_xfs_attr_defer_add(new->xattri_dela_state, args->dp);
}
const struct xfs_defer_op_type xfs_attr_defer_type = {
.name = "attr",
.max_items = 1,
.create_intent = xfs_attr_create_intent,
.abort_intent = xfs_attr_abort_intent,
.create_done = xfs_attr_create_done,
.finish_item = xfs_attr_finish_item,
.cancel_item = xfs_attr_cancel_item,
.recover_work = xfs_attr_recover_work,
.relog_intent = xfs_attr_relog_intent,
};
static inline void *
xfs_attri_validate_name_iovec(
struct xfs_mount *mp,
struct xfs_attri_log_format *attri_formatp,
const struct xfs_log_iovec *iovec,
unsigned int name_len)
{
if (iovec->i_len != xlog_calc_iovec_len(name_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, sizeof(*attri_formatp));
return NULL;
}
if (!xfs_attr_namecheck(attri_formatp->alfi_attr_filter, iovec->i_addr,
name_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, sizeof(*attri_formatp));
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
iovec->i_addr, iovec->i_len);
return NULL;
}
return iovec->i_addr;
}
static inline void *
xfs_attri_validate_value_iovec(
struct xfs_mount *mp,
struct xfs_attri_log_format *attri_formatp,
const struct xfs_log_iovec *iovec,
unsigned int value_len)
{
if (iovec->i_len != xlog_calc_iovec_len(value_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, sizeof(*attri_formatp));
return NULL;
}
if ((attri_formatp->alfi_attr_filter & XFS_ATTR_PARENT) &&
!xfs_parent_valuecheck(mp, iovec->i_addr, value_len)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, sizeof(*attri_formatp));
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
iovec->i_addr, iovec->i_len);
return NULL;
}
return iovec->i_addr;
}
STATIC int
xlog_recover_attri_commit_pass2(
struct xlog *log,
struct list_head *buffer_list,
struct xlog_recover_item *item,
xfs_lsn_t lsn)
{
struct xfs_mount *mp = log->l_mp;
struct xfs_attri_log_item *attrip;
struct xfs_attri_log_format *attri_formatp;
struct xfs_attri_log_nameval *nv;
const void *attr_name;
const void *attr_value = NULL;
const void *attr_new_name = NULL;
const void *attr_new_value = NULL;
size_t len;
unsigned int name_len = 0;
unsigned int value_len = 0;
unsigned int new_name_len = 0;
unsigned int new_value_len = 0;
unsigned 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[i].i_len != len) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
item->ri_buf[0].i_addr, item->ri_buf[0].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,
attri_formatp, len);
return -EFSCORRUPTED;
}
/* Check the number of log iovecs makes sense for the op code. */
op = xfs_attr_log_item_op(attri_formatp);
switch (op) {
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
/* Log item, attr name, attr value */
if (item->ri_total != 3) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
name_len = attri_formatp->alfi_name_len;
value_len = attri_formatp->alfi_value_len;
break;
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
/* Log item, attr name, attr value */
if (item->ri_total != 3) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
name_len = attri_formatp->alfi_name_len;
value_len = attri_formatp->alfi_value_len;
break;
case XFS_ATTRI_OP_FLAGS_REMOVE:
/* Log item, attr name */
if (item->ri_total != 2) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
name_len = attri_formatp->alfi_name_len;
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
/*
* Log item, attr name, new attr name, attr value, new attr
* value
*/
if (item->ri_total != 5) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
name_len = attri_formatp->alfi_old_name_len;
new_name_len = attri_formatp->alfi_new_name_len;
new_value_len = value_len = attri_formatp->alfi_value_len;
break;
default:
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
i++;
/* Validate the attr name */
attr_name = xfs_attri_validate_name_iovec(mp, attri_formatp,
&item->ri_buf[i], name_len);
if (!attr_name)
return -EFSCORRUPTED;
i++;
/* Validate the new attr name */
if (new_name_len > 0) {
attr_new_name = xfs_attri_validate_name_iovec(mp,
attri_formatp, &item->ri_buf[i],
new_name_len);
if (!attr_new_name)
return -EFSCORRUPTED;
i++;
}
/* Validate the attr value, if present */
if (value_len != 0) {
attr_value = xfs_attri_validate_value_iovec(mp, attri_formatp,
&item->ri_buf[i], value_len);
if (!attr_value)
return -EFSCORRUPTED;
i++;
}
/* Validate the new attr value, if present */
if (new_value_len != 0) {
attr_new_value = xfs_attri_validate_value_iovec(mp,
attri_formatp, &item->ri_buf[i],
new_value_len);
if (!attr_new_value)
return -EFSCORRUPTED;
i++;
}
/*
* Make sure we got the correct number of buffers for the operation
* that we just loaded.
*/
if (i != item->ri_total) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
switch (op) {
case XFS_ATTRI_OP_FLAGS_REMOVE:
/* Regular remove operations operate only on names. */
if (attr_value != NULL || value_len != 0) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
fallthrough;
case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
case XFS_ATTRI_OP_FLAGS_PPTR_SET:
case XFS_ATTRI_OP_FLAGS_SET:
case XFS_ATTRI_OP_FLAGS_REPLACE:
/*
* Regular xattr set/remove/replace operations require a name
* and do not take a newname. Values are optional for set and
* replace.
*
* Name-value set/remove operations must have a name, do not
* take a newname, and can take a value.
*/
if (attr_name == NULL || name_len == 0) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
break;
case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
/*
* Name-value replace operations require the caller to
* specify the old and new names and values explicitly.
* Values are optional.
*/
if (attr_name == NULL || name_len == 0) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
if (attr_new_name == NULL || new_name_len == 0) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
attri_formatp, len);
return -EFSCORRUPTED;
}
break;
}
/*
* Memory alloc failure will cause replay to abort. We attach the
* name/value buffer to the recovered incore log item and drop our
* reference.
*/
nv = xfs_attri_log_nameval_alloc(attr_name, name_len,
attr_new_name, new_name_len,
attr_value, value_len,
attr_new_value, new_value_len);
attrip = xfs_attri_init(mp, nv);
memcpy(&attrip->attri_format, attri_formatp, len);
xlog_recover_intent_item(log, &attrip->attri_item, lsn,
&xfs_attr_defer_type);
xfs_attri_log_nameval_put(nv);
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_commit_pass2(
struct xlog *log,
struct list_head *buffer_list,
struct xlog_recover_item *item,
xfs_lsn_t lsn)
{
struct xfs_attrd_log_format *attrd_formatp;
attrd_formatp = item->ri_buf[0].i_addr;
if (item->ri_buf[0].i_len != sizeof(struct xfs_attrd_log_format)) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
return -EFSCORRUPTED;
}
xlog_recover_release_intent(log, XFS_LI_ATTRI,
attrd_formatp->alfd_alf_id);
return 0;
}
static const struct xfs_item_ops xfs_attri_item_ops = {
.flags = XFS_ITEM_INTENT,
.iop_size = xfs_attri_item_size,
.iop_format = xfs_attri_item_format,
.iop_unpin = xfs_attri_item_unpin,
.iop_release = xfs_attri_item_release,
.iop_match = xfs_attri_item_match,
};
const struct xlog_recover_item_ops xlog_attri_item_ops = {
.item_type = XFS_LI_ATTRI,
.commit_pass2 = xlog_recover_attri_commit_pass2,
};
static const struct xfs_item_ops xfs_attrd_item_ops = {
.flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
XFS_ITEM_INTENT_DONE,
.iop_size = xfs_attrd_item_size,
.iop_format = xfs_attrd_item_format,
.iop_release = xfs_attrd_item_release,
.iop_intent = xfs_attrd_item_intent,
};
const struct xlog_recover_item_ops xlog_attrd_item_ops = {
.item_type = XFS_LI_ATTRD,
.commit_pass2 = xlog_recover_attrd_commit_pass2,
};