microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

ocfs2: Allocation in ocfs2_xa_prepare_entry(), values in ocfs2_xa_store_value() 

ocfs2_xa_prepare_entry() gets all the logic to add, remove, or modify
external value trees.  Now, when it exits, the entry is ready to receive
a value of any size.

ocfs2_xa_remove() is added to handle the complete removal of an entry.
It truncates the external value tree before calling
ocfs2_xa_remove_entry().

ocfs2_xa_store_inline_value() becomes ocfs2_xa_store_value().  It can
store any value.

ocfs2_xattr_set_entry() loses all the allocation logic and just uses
these functions.  ocfs2_xattr_set_value_outside() disappears.

ocfs2_xattr_set_in_bucket() uses these functions and makes
ocfs2_xattr_set_entry_in_bucket() obsolete.  That goes away, as does
ocfs2_xattr_bucket_set_value_outside() and
ocfs2_xattr_bucket_value_truncate().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Joel Becker 2009-08-18 20:26:41 -07:00
Родитель cf2bc80940
Коммит 73857ee0b5
1 изменённых файлов: 195 добавлений и 484 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

679
fs/ocfs2/xattr.c
Просмотреть файл

@ -573,24 +573,6 @@ static u32 ocfs2_xattr_name_hash(struct inode *inode,
return hash;
}
/*
* ocfs2_xattr_hash_entry()
*
* Compute the hash of an extended attribute.
*/
static void ocfs2_xattr_hash_entry(struct inode *inode,
struct ocfs2_xattr_header *header,
struct ocfs2_xattr_entry *entry)
{
u32 hash = 0;
char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len);
entry->xe_name_hash = cpu_to_le32(hash);
return;
}
static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
{
return namevalue_size(name_len, value_len) +
@ -1423,113 +1405,6 @@ out:
return ret;
}
static int ocfs2_xattr_cleanup(struct inode *inode,
handle_t *handle,
struct ocfs2_xattr_info *xi,
struct ocfs2_xattr_search *xs,
struct ocfs2_xattr_value_buf *vb,
size_t offs)
{
int ret = 0;
void *val = xs->base + offs;
size_t size = namevalue_size_xi(xi);
ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
goto out;
}
/* Decrease xattr count */
le16_add_cpu(&xs->header->xh_count, -1);
/* Remove the xattr entry and tree root which has already be set*/
memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
memset(val, 0, size);
ret = ocfs2_journal_dirty(handle, vb->vb_bh);
if (ret < 0)
mlog_errno(ret);
out:
return ret;
}
static int ocfs2_xattr_update_entry(struct inode *inode,
handle_t *handle,
struct ocfs2_xattr_info *xi,
struct ocfs2_xattr_search *xs,
struct ocfs2_xattr_value_buf *vb,
size_t offs)
{
int ret;
ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
goto out;
}
xs->here->xe_name_offset = cpu_to_le16(offs);
xs->here->xe_value_size = cpu_to_le64(xi->xi_value_len);
if (xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE)
ocfs2_xattr_set_local(xs->here, 1);
else
ocfs2_xattr_set_local(xs->here, 0);
ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
ret = ocfs2_journal_dirty(handle, vb->vb_bh);
if (ret < 0)
mlog_errno(ret);
out:
return ret;
}
/*
* ocfs2_xattr_set_value_outside()
*
* Set large size value in B tree.
*/
static int ocfs2_xattr_set_value_outside(struct inode *inode,
struct ocfs2_xattr_info *xi,
struct ocfs2_xattr_search *xs,
struct ocfs2_xattr_set_ctxt *ctxt,
struct ocfs2_xattr_value_buf *vb,
size_t offs)
{
void *val = xs->base + offs;
struct ocfs2_xattr_value_root *xv = NULL;
size_t size = namevalue_size_xi(xi);
int ret = 0;
memset(val, 0, size);
memcpy(val, xi->xi_name, xi->xi_name_len);
xv = (struct ocfs2_xattr_value_root *)
(val + OCFS2_XATTR_SIZE(xi->xi_name_len));
xv->xr_clusters = 0;
xv->xr_last_eb_blk = 0;
xv->xr_list.l_tree_depth = 0;
xv->xr_list.l_count = cpu_to_le16(1);
xv->xr_list.l_next_free_rec = 0;
vb->vb_xv = xv;
ret = ocfs2_xattr_value_truncate(inode, vb, xi->xi_value_len, ctxt);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb,
xi->xi_value, xi->xi_value_len);
if (ret < 0)
mlog_errno(ret);
return ret;
}
static int ocfs2_xa_check_space_helper(int needed_space, int free_start,
int num_entries)
{
@ -1640,6 +1515,7 @@ static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc,
int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
/* Value bufs are for value trees */
BUG_ON(ocfs2_xattr_is_local(loc->xl_entry));
BUG_ON(namevalue_size_xe(loc->xl_entry) !=
(name_size + OCFS2_XATTR_ROOT_SIZE));
@ -2001,6 +1877,33 @@ static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
.xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf,
};
static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int trunc_rc, access_rc;
struct ocfs2_xattr_value_buf vb;
ocfs2_xa_fill_value_buf(loc, &vb);
trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes,
ctxt);
/*
* The caller of ocfs2_xa_value_truncate() has already called
* ocfs2_xa_journal_access on the loc. However, The truncate code
* calls ocfs2_extend_trans(). This may commit the previous
* transaction and open a new one. If this is a bucket, truncate
* could leave only vb->vb_bh set up for journaling. Meanwhile,
* the caller is expecting to dirty the entire bucket. So we must
* reset the journal work. We do this even if truncate has failed,
* as it could have failed after committing the extend.
*/
access_rc = ocfs2_xa_journal_access(ctxt->handle, loc,
OCFS2_JOURNAL_ACCESS_WRITE);
/* Errors in truncate take precedence */
return trunc_rc ? trunc_rc : access_rc;
}
static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
{
int index, count;
@ -2028,6 +1931,88 @@ static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
}
}
static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int rc = 0;
if (!ocfs2_xattr_is_local(loc->xl_entry)) {
rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
if (rc) {
mlog_errno(rc);
goto out;
}
}
ocfs2_xa_remove_entry(loc);
out:
return rc;
}
static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc)
{
int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
char *nameval_buf;
nameval_buf = ocfs2_xa_offset_pointer(loc,
le16_to_cpu(loc->xl_entry->xe_name_offset));
memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE);
}
/*
* Take an existing entry and make it ready for the new value. This
* won't allocate space, but it may free space. It should be ready for
* ocfs2_xa_prepare_entry() to finish the work.
*/
static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc,
struct ocfs2_xattr_info *xi,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int rc = 0;
int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
char *nameval_buf;
int xe_local = ocfs2_xattr_is_local(loc->xl_entry);
int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE;
BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) !=
name_size);
nameval_buf = ocfs2_xa_offset_pointer(loc,
le16_to_cpu(loc->xl_entry->xe_name_offset));
if (xe_local) {
memset(nameval_buf + name_size, 0,
namevalue_size_xe(loc->xl_entry) - name_size);
if (!xi_local)
ocfs2_xa_install_value_root(loc);
} else {
if (xi_local) {
rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
if (rc < 0) {
mlog_errno(rc);
goto out;
}
memset(nameval_buf + name_size, 0,
namevalue_size_xe(loc->xl_entry) -
name_size);
} else if (le64_to_cpu(loc->xl_entry->xe_value_size) >
xi->xi_value_len) {
rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len,
ctxt);
if (rc < 0) {
mlog_errno(rc);
goto out;
}
}
}
loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
ocfs2_xattr_set_local(loc->xl_entry, xi_local);
out:
return rc;
}
/*
* Prepares loc->xl_entry to receive the new xattr. This includes
* properly setting up the name+value pair region. If loc->xl_entry
@ -2040,14 +2025,13 @@ static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
*/
static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
struct ocfs2_xattr_info *xi,
u32 name_hash)
u32 name_hash,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int rc = 0;
int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
char *nameval_buf;
if (!xi->xi_value) {
ocfs2_xa_remove_entry(loc);
rc = ocfs2_xa_remove(loc, ctxt);
goto out;
}
@ -2057,15 +2041,19 @@ static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
if (loc->xl_entry) {
if (ocfs2_xa_can_reuse_entry(loc, xi)) {
nameval_buf = ocfs2_xa_offset_pointer(loc,
le16_to_cpu(loc->xl_entry->xe_name_offset));
memset(nameval_buf + name_size, 0,
namevalue_size_xe(loc->xl_entry) - name_size);
loc->xl_entry->xe_value_size =
cpu_to_le64(xi->xi_value_len);
goto out;
rc = ocfs2_xa_reuse_entry(loc, xi, ctxt);
if (rc)
goto out;
goto alloc_value;
}
if (!ocfs2_xattr_is_local(loc->xl_entry)) {
rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
if (rc) {
mlog_errno(rc);
goto out;
}
}
ocfs2_xa_wipe_namevalue(loc);
} else
ocfs2_xa_add_entry(loc, name_hash);
@ -2075,33 +2063,50 @@ static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
* name+value pair back from the end.
*/
ocfs2_xa_add_namevalue(loc, xi);
if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
ocfs2_xa_install_value_root(loc);
alloc_value:
if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt);
if (rc < 0)
mlog_errno(rc);
}
out:
return rc;
}
/*
* Store the value portion of the name+value pair. This is either an
* inline value or the tree root of an external value.
* Store the value portion of the name+value pair. This will skip
* values that are stored externally. Their tree roots were set up
* by ocfs2_xa_prepare_entry().
*/
static void ocfs2_xa_store_inline_value(struct ocfs2_xa_loc *loc,
struct ocfs2_xattr_info *xi)
static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc,
struct ocfs2_xattr_info *xi,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int rc = 0;
int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
int inline_value_size = namevalue_size_xi(xi) - name_size;
const void *value = xi->xi_value;
char *nameval_buf;
struct ocfs2_xattr_value_buf vb;
if (!xi->xi_value)
return;
goto out;
if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
value = &def_xv;
inline_value_size = OCFS2_XATTR_ROOT_SIZE;
}
nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
memcpy(nameval_buf + name_size, value, inline_value_size);
if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
ocfs2_xa_fill_value_buf(loc, &vb);
rc = __ocfs2_xattr_set_value_outside(loc->xl_inode,
ctxt->handle, &vb,
xi->xi_value,
xi->xi_value_len);
} else
memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len);
out:
return rc;
}
static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
@ -2174,117 +2179,19 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
struct ocfs2_xattr_set_ctxt *ctxt,
int flag)
{
struct ocfs2_xattr_entry *last;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
size_t min_offs = xs->end - xs->base;
size_t size_l = 0;
handle_t *handle = ctxt->handle;
int free, i, ret;
int ret;
u32 name_hash = ocfs2_xattr_name_hash(inode, xi->xi_name,
xi->xi_name_len);
struct ocfs2_xa_loc loc;
struct ocfs2_xattr_value_buf vb = {
.vb_bh = xs->xattr_bh,
.vb_access = ocfs2_journal_access_di,
};
if (!(flag & OCFS2_INLINE_XATTR_FL)) {
if (!(flag & OCFS2_INLINE_XATTR_FL))
BUG_ON(xs->xattr_bh == xs->inode_bh);
vb.vb_access = ocfs2_journal_access_xb;
} else
else
BUG_ON(xs->xattr_bh != xs->inode_bh);
/* Compute min_offs, last and free space. */
last = xs->header->xh_entries;
for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
size_t offs = le16_to_cpu(last->xe_name_offset);
if (offs < min_offs)
min_offs = offs;
last += 1;
}
free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
if (free < 0)
return -EIO;
if (!xs->not_found)
free += ocfs2_xe_entry_usage(xs->here);
/* Check free space in inode or block */
if (xi->xi_value && (free < ocfs2_xi_entry_usage(xi))) {
ret = -ENOSPC;
goto out;
}
if (!xs->not_found) {
/* For existing extended attribute */
size_t size = namevalue_size_xe(xs->here);
size_t offs = le16_to_cpu(xs->here->xe_name_offset);
void *val = xs->base + offs;
if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
/* Replace existing local xattr with tree root */
ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
ctxt, &vb, offs);
if (ret < 0)
mlog_errno(ret);
goto out;
} else if (!ocfs2_xattr_is_local(xs->here)) {
/* For existing xattr which has value outside */
vb.vb_xv = (struct ocfs2_xattr_value_root *)
(val + OCFS2_XATTR_SIZE(xi->xi_name_len));
if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
/*
* If new value need set outside also,
* first truncate old value to new value,
* then set new value with set_value_outside().
*/
ret = ocfs2_xattr_value_truncate(inode,
&vb,
xi->xi_value_len,
ctxt);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
ret = ocfs2_xattr_update_entry(inode,
handle,
xi,
xs,
&vb,
offs);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
ret = __ocfs2_xattr_set_value_outside(inode,
handle,
&vb,
xi->xi_value,
xi->xi_value_len);
if (ret < 0)
mlog_errno(ret);
goto out;
} else {
/*
* If new value need set in local,
* just trucate old value to zero.
*/
ret = ocfs2_xattr_value_truncate(inode,
&vb,
0,
ctxt);
if (ret < 0)
mlog_errno(ret);
}
}
}
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
@ -2305,22 +2212,20 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
goto out;
}
/*
* Prepare our entry and insert the inline value. This will
* be a value tree root for values that are larger than
* OCFS2_XATTR_INLINE_SIZE.
*/
ret = ocfs2_xa_prepare_entry(&loc, xi, name_hash);
ret = ocfs2_xa_prepare_entry(&loc, xi, name_hash, ctxt);
if (ret) {
if (ret != -ENOSPC)
mlog_errno(ret);
goto out;
}
/* XXX For now, until we make ocfs2_xa_prepare_entry() primary */
BUG_ON(ret == -ENOSPC);
ocfs2_xa_store_inline_value(&loc, xi);
xs->here = loc.xl_entry;
ret = ocfs2_xa_store_value(&loc, xi, ctxt);
if (ret) {
mlog_errno(ret);
goto out;
}
ocfs2_xa_journal_dirty(handle, &loc);
if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
@ -2352,28 +2257,6 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
if (ret < 0)
mlog_errno(ret);
if (!ret && xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
/*
* Set value outside in B tree.
* This is the second step for value size > INLINE_SIZE.
*/
size_t offs = le16_to_cpu(xs->here->xe_name_offset);
ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt,
&vb, offs);
if (ret < 0) {
int ret2;
mlog_errno(ret);
/*
* If set value outside failed, we have to clean
* the junk tree root we have already set in local.
*/
ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
xi, xs, &vb, offs);
if (ret2 < 0)
mlog_errno(ret2);
}
}
out:
return ret;
}
@ -5353,61 +5236,6 @@ static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
return bucket_block(bucket, block_off) + offs;
}
/*
* Set the xattr entry in the specified bucket.
* The bucket is indicated by xs->bucket and it should have the enough
* space for the xattr insertion.
*/
static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
handle_t *handle,
struct ocfs2_xattr_info *xi,
struct ocfs2_xattr_search *xs,
u32 name_hash)
{
int ret;
u64 blkno;
struct ocfs2_xa_loc loc;
mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
(unsigned long)xi->xi_value_len, xi->xi_name_index,
(unsigned long long)bucket_blkno(xs->bucket));
if (!xs->bucket->bu_bhs[1]) {
blkno = bucket_blkno(xs->bucket);
ocfs2_xattr_bucket_relse(xs->bucket);
ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
if (ret) {
mlog_errno(ret);
goto out;
}
}
ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
xs->not_found ? NULL : xs->here);
ret = ocfs2_xa_journal_access(handle, &loc,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
ret = ocfs2_xa_prepare_entry(&loc, xi, name_hash);
if (ret) {
if (ret != -ENOSPC)
mlog_errno(ret);
goto out;
}
/* XXX For now, until we make ocfs2_xa_prepare_entry() primary */
BUG_ON(ret == -ENOSPC);
ocfs2_xa_store_inline_value(&loc, xi);
xs->here = loc.xl_entry;
ocfs2_xa_journal_dirty(handle, &loc);
out:
return ret;
}
/*
* Truncate the specified xe_off entry in xattr bucket.
* bucket is indicated by header_bh and len is the new length.
@ -5478,66 +5306,6 @@ out:
return ret;
}
static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
struct ocfs2_xattr_search *xs,
int len,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int ret, offset;
struct ocfs2_xattr_entry *xe = xs->here;
struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
offset = xe - xh->xh_entries;
ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
offset, len, ctxt);
if (ret)
mlog_errno(ret);
return ret;
}
static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
handle_t *handle,
struct ocfs2_xattr_search *xs,
char *val,
int value_len)
{
int ret, offset, block_off;
struct ocfs2_xattr_value_root *xv;
struct ocfs2_xattr_entry *xe = xs->here;
struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
void *base;
struct ocfs2_xattr_value_buf vb = {
.vb_access = ocfs2_journal_access,
};
BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, xh,
xe - xh->xh_entries,
&block_off,
&offset);
if (ret) {
mlog_errno(ret);
goto out;
}
base = bucket_block(xs->bucket, block_off);
xv = (struct ocfs2_xattr_value_root *)(base + offset +
OCFS2_XATTR_SIZE(xe->xe_name_len));
vb.vb_xv = xv;
vb.vb_bh = xs->bucket->bu_bhs[block_off];
ret = __ocfs2_xattr_set_value_outside(inode, handle,
&vb, val, value_len);
if (ret)
mlog_errno(ret);
out:
return ret;
}
static int ocfs2_rm_xattr_cluster(struct inode *inode,
struct buffer_head *root_bh,
u64 blkno,
@ -5636,41 +5404,8 @@ out:
return ret;
}
static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
handle_t *handle,
struct ocfs2_xattr_search *xs)
{
struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
struct ocfs2_xattr_entry *last = &xh->xh_entries[
le16_to_cpu(xh->xh_count) - 1];
int ret = 0;
ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
return;
}
/* Remove the old entry. */
memmove(xs->here, xs->here + 1,
(void *)last - (void *)xs->here);
memset(last, 0, sizeof(struct ocfs2_xattr_entry));
le16_add_cpu(&xh->xh_count, -1);
ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
}
/*
* Set the xattr name/value in the bucket specified in xs.
*
* As the new value in xi may be stored in the bucket or in an outside cluster,
* we divide the whole process into 3 steps:
* 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
* 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
* 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
* 4. If the clusters for the new outside value can't be allocated, we need
* to free the xattr we allocated in set.
*/
static int ocfs2_xattr_set_in_bucket(struct inode *inode,
struct ocfs2_xattr_info *xi,
@ -5678,70 +5413,46 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode,
struct ocfs2_xattr_set_ctxt *ctxt)
{
int ret;
size_t value_len;
char *val = (char *)xi->xi_value;
struct ocfs2_xattr_entry *xe = xs->here;
u64 blkno;
struct ocfs2_xa_loc loc;
u32 name_hash = ocfs2_xattr_name_hash(inode, xi->xi_name,
xi->xi_name_len);
value_len = xi->xi_value_len;
if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
/*
* We need to truncate the xattr storage first.
*
* If both the old and new value are stored to
* outside block, we only need to truncate
* the storage and then set the value outside.
*
* If the new value should be stored within block,
* we should free all the outside block first and
* the modification to the xattr block will be done
* by following steps.
*/
if (xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE)
value_len = 0;
ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
value_len,
ctxt);
if (ret)
if (!xs->bucket->bu_bhs[1]) {
blkno = bucket_blkno(xs->bucket);
ocfs2_xattr_bucket_relse(xs->bucket);
ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
if (ret) {
mlog_errno(ret);
goto out;
if (value_len)
goto set_value_outside;
}
/* So we have to handle the inside block change now. */
ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
name_hash);
if (ret) {
mlog_errno(ret);
goto out;
}
if (xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE)
goto out;
/* allocate the space now for the outside block storage. */
ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
value_len, ctxt);
if (ret) {
mlog_errno(ret);
if (xs->not_found) {
/*
* We can't allocate enough clusters for outside
* storage and we have allocated xattr already,
* so need to remove it.
*/
ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
}
}
ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
xs->not_found ? NULL : xs->here);
ret = ocfs2_xa_journal_access(ctxt->handle, &loc,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
set_value_outside:
ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
xs, val, value_len);
ret = ocfs2_xa_prepare_entry(&loc, xi, name_hash, ctxt);
if (ret) {
if (ret != -ENOSPC)
mlog_errno(ret);
goto out;
}
xs->here = loc.xl_entry;
ret = ocfs2_xa_store_value(&loc, xi, ctxt);
if (ret) {
mlog_errno(ret);
goto out;
}
ocfs2_xa_journal_dirty(ctxt->handle, &loc);
out:
return ret;
}