int status;
handle_t *handle;
struct ocfs2_dinode *di;
+ u64 cluster_bytes;
mlog_entry_void();
/*
* Do this before setting i_size.
*/
- status = ocfs2_zero_tail_for_truncate(inode, handle, new_i_size);
+ cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
+ status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
+ cluster_bytes);
if (status) {
mlog_errno(status);
goto out_commit;
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)new_i_size);
- unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
- truncate_inode_pages(inode->i_mapping, new_i_size);
-
fe = (struct ocfs2_dinode *) di_bh->b_data;
if (!OCFS2_IS_VALID_DINODE(fe)) {
OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
if (new_i_size == le64_to_cpu(fe->i_size))
goto bail;
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
/* This forces other nodes to sync and drop their pages. Do
* this even if we have a truncate without allocation change -
* ocfs2 cluster sizes can be much greater than page size, so
* we have to truncate them anyway. */
status = ocfs2_data_lock(inode, 1);
if (status < 0) {
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
mlog_errno(status);
goto bail;
}
+ unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(inode->i_mapping, new_i_size);
+
/* alright, we're going to need to do a full blown alloc size
* change. Orphan the inode so that recovery can complete the
* truncate if necessary. This does the task of marking
bail_unlock_data:
ocfs2_data_unlock(inode, 1);
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
bail:
mlog_exit(status);
struct inode *inode,
u32 *logical_offset,
u32 clusters_to_add,
+ int mark_unwritten,
struct buffer_head *fe_bh,
handle_t *handle,
struct ocfs2_alloc_context *data_ac,
enum ocfs2_alloc_restarted reason = RESTART_NONE;
u32 bit_off, num_bits;
u64 block;
+ u8 flags = 0;
BUG_ON(!clusters_to_add);
+ if (mark_unwritten)
+ flags = OCFS2_EXT_UNWRITTEN;
+
free_extents = ocfs2_num_free_extents(osb, inode, fe);
if (free_extents < 0) {
status = free_extents;
num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
status = ocfs2_insert_extent(osb, handle, inode, fe_bh,
*logical_offset, block, num_bits,
- meta_ac);
+ flags, meta_ac);
if (status < 0) {
mlog_errno(status);
goto leave;
* For a given allocation, determine which allocators will need to be
* accessed, and lock them, reserving the appropriate number of bits.
*
- * Called from ocfs2_extend_allocation() for file systems which don't
- * support holes, and from ocfs2_write() for file systems which
- * understand sparse inodes.
+ * Sparse file systems call this from ocfs2_write_begin_nolock()
+ * and ocfs2_allocate_unwritten_extents().
+ *
+ * File systems which don't support holes call this from
+ * ocfs2_extend_allocation().
*/
int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
- u32 clusters_to_add,
+ u32 clusters_to_add, u32 extents_to_split,
struct ocfs2_alloc_context **data_ac,
struct ocfs2_alloc_context **meta_ac)
{
- int ret, num_free_extents;
+ int ret = 0, num_free_extents;
+ unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
*meta_ac = NULL;
- *data_ac = NULL;
+ if (data_ac)
+ *data_ac = NULL;
+
+ BUG_ON(clusters_to_add != 0 && data_ac == NULL);
mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
- "clusters_to_add = %u\n",
+ "clusters_to_add = %u, extents_to_split = %u\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode),
- le32_to_cpu(di->i_clusters), clusters_to_add);
+ le32_to_cpu(di->i_clusters), clusters_to_add, extents_to_split);
num_free_extents = ocfs2_num_free_extents(osb, inode, di);
if (num_free_extents < 0) {
*
* Most of the time we'll only be seeing this 1 cluster at a time
* anyway.
+ *
+ * Always lock for any unwritten extents - we might want to
+ * add blocks during a split.
*/
if (!num_free_extents ||
- (ocfs2_sparse_alloc(osb) && num_free_extents < clusters_to_add)) {
+ (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) {
ret = ocfs2_reserve_new_metadata(osb, di, meta_ac);
if (ret < 0) {
if (ret != -ENOSPC)
}
}
+ if (clusters_to_add == 0)
+ goto out;
+
ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac);
if (ret < 0) {
if (ret != -ENOSPC)
return ret;
}
-static int ocfs2_extend_allocation(struct inode *inode,
- u32 clusters_to_add)
+static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
+ u32 clusters_to_add, int mark_unwritten)
{
int status = 0;
int restart_func = 0;
- int drop_alloc_sem = 0;
int credits;
- u32 prev_clusters, logical_start;
+ u32 prev_clusters;
struct buffer_head *bh = NULL;
struct ocfs2_dinode *fe = NULL;
handle_t *handle = NULL;
* This function only exists for file systems which don't
* support holes.
*/
- BUG_ON(ocfs2_sparse_alloc(osb));
+ BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh,
OCFS2_BH_CACHED, inode);
goto leave;
}
- logical_start = OCFS2_I(inode)->ip_clusters;
-
restart_all:
BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
- /* blocks peope in read/write from reading our allocation
- * until we're done changing it. We depend on i_mutex to block
- * other extend/truncate calls while we're here. Ordering wrt
- * start_trans is important here -- always do it before! */
- down_write(&OCFS2_I(inode)->ip_alloc_sem);
- drop_alloc_sem = 1;
-
- status = ocfs2_lock_allocators(inode, fe, clusters_to_add, &data_ac,
+ status = ocfs2_lock_allocators(inode, fe, clusters_to_add, 0, &data_ac,
&meta_ac);
if (status) {
mlog_errno(status);
inode,
&logical_start,
clusters_to_add,
+ mark_unwritten,
bh,
handle,
data_ac,
OCFS2_I(inode)->ip_clusters, i_size_read(inode));
leave:
- if (drop_alloc_sem) {
- up_write(&OCFS2_I(inode)->ip_alloc_sem);
- drop_alloc_sem = 0;
- }
if (handle) {
ocfs2_commit_trans(osb, handle);
handle = NULL;
return status;
}
+static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
+ u32 clusters_to_add, int mark_unwritten)
+{
+ int ret;
+
+ /*
+ * The alloc sem blocks peope in read/write from reading our
+ * allocation until we're done changing it. We depend on
+ * i_mutex to block other extend/truncate calls while we're
+ * here.
+ */
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+ ret = __ocfs2_extend_allocation(inode, logical_start, clusters_to_add,
+ mark_unwritten);
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+ return ret;
+}
+
/* Some parts of this taken from generic_cont_expand, which turned out
* to be too fragile to do exactly what we need without us having to
* worry about recursive locking in ->prepare_write() and
}
if (clusters_to_add) {
- ret = ocfs2_extend_allocation(inode, clusters_to_add);
+ ret = ocfs2_extend_allocation(inode,
+ OCFS2_I(inode)->ip_clusters,
+ clusters_to_add, 0);
if (ret < 0) {
mlog_errno(ret);
goto out_unlock;
goto bail_unlock;
}
+ /*
+ * This will intentionally not wind up calling vmtruncate(),
+ * since all the work for a size change has been done above.
+ * Otherwise, we could get into problems with truncate as
+ * ip_alloc_sem is used there to protect against i_size
+ * changes.
+ */
status = inode_setattr(inode, attr);
if (status < 0) {
mlog_errno(status);
return ret;
}
-static int ocfs2_write_remove_suid(struct inode *inode)
+static int __ocfs2_write_remove_suid(struct inode *inode,
+ struct buffer_head *bh)
{
int ret;
- struct buffer_head *bh = NULL;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
handle_t *handle;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di;
mlog_entry("(Inode %llu, mode 0%o)\n",
- (unsigned long long)oi->ip_blkno, inode->i_mode);
+ (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (handle == NULL) {
goto out;
}
- ret = ocfs2_read_block(osb, oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
- if (ret < 0) {
- mlog_errno(ret);
- goto out_trans;
- }
-
ret = ocfs2_journal_access(handle, inode, bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
mlog_errno(ret);
- goto out_bh;
+ goto out_trans;
}
inode->i_mode &= ~S_ISUID;
ret = ocfs2_journal_dirty(handle, bh);
if (ret < 0)
mlog_errno(ret);
-out_bh:
- brelse(bh);
+
out_trans:
ocfs2_commit_trans(osb, handle);
out:
return ret;
}
+static int ocfs2_write_remove_suid(struct inode *inode)
+{
+ int ret;
+ struct buffer_head *bh = NULL;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+
+ ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+ oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = __ocfs2_write_remove_suid(inode, bh);
+out:
+ brelse(bh);
+ return ret;
+}
+
+/*
+ * Allocate enough extents to cover the region starting at byte offset
+ * start for len bytes. Existing extents are skipped, any extents
+ * added are marked as "unwritten".
+ */
+static int ocfs2_allocate_unwritten_extents(struct inode *inode,
+ u64 start, u64 len)
+{
+ int ret;
+ u32 cpos, phys_cpos, clusters, alloc_size;
+
+ /*
+ * We consider both start and len to be inclusive.
+ */
+ cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
+ clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
+ clusters -= cpos;
+
+ while (clusters) {
+ ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
+ &alloc_size, NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * Hole or existing extent len can be arbitrary, so
+ * cap it to our own allocation request.
+ */
+ if (alloc_size > clusters)
+ alloc_size = clusters;
+
+ if (phys_cpos) {
+ /*
+ * We already have an allocation at this
+ * region so we can safely skip it.
+ */
+ goto next;
+ }
+
+ ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
+ if (ret) {
+ if (ret != -ENOSPC)
+ mlog_errno(ret);
+ goto out;
+ }
+
+next:
+ cpos += alloc_size;
+ clusters -= alloc_size;
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
+static int __ocfs2_remove_inode_range(struct inode *inode,
+ struct buffer_head *di_bh,
+ u32 cpos, u32 phys_cpos, u32 len,
+ struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+ int ret;
+ u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct inode *tl_inode = osb->osb_tl_inode;
+ handle_t *handle;
+ struct ocfs2_alloc_context *meta_ac = NULL;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+
+ ret = ocfs2_lock_allocators(inode, di, 0, 1, NULL, &meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ mutex_lock(&tl_inode->i_mutex);
+
+ if (ocfs2_truncate_log_needs_flush(osb)) {
+ ret = __ocfs2_flush_truncate_log(osb);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
+ if (handle == NULL) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_journal_access(handle, inode, di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_remove_extent(inode, di_bh, cpos, len, handle, meta_ac,
+ dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ OCFS2_I(inode)->ip_clusters -= len;
+ di->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
+
+ ret = ocfs2_journal_dirty(handle, di_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len);
+ if (ret)
+ mlog_errno(ret);
+
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+out:
+ mutex_unlock(&tl_inode->i_mutex);
+
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+
+ return ret;
+}
+
+/*
+ * Truncate a byte range, avoiding pages within partial clusters. This
+ * preserves those pages for the zeroing code to write to.
+ */
+static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
+ u64 byte_len)
+{
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ loff_t start, end;
+ struct address_space *mapping = inode->i_mapping;
+
+ start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
+ end = byte_start + byte_len;
+ end = end & ~(osb->s_clustersize - 1);
+
+ if (start < end) {
+ unmap_mapping_range(mapping, start, end - start, 0);
+ truncate_inode_pages_range(mapping, start, end - 1);
+ }
+}
+
+static int ocfs2_zero_partial_clusters(struct inode *inode,
+ u64 start, u64 len)
+{
+ int ret = 0;
+ u64 tmpend, end = start + len;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ unsigned int csize = osb->s_clustersize;
+ handle_t *handle;
+
+ /*
+ * The "start" and "end" values are NOT necessarily part of
+ * the range whose allocation is being deleted. Rather, this
+ * is what the user passed in with the request. We must zero
+ * partial clusters here. There's no need to worry about
+ * physical allocation - the zeroing code knows to skip holes.
+ */
+ mlog(0, "byte start: %llu, end: %llu\n",
+ (unsigned long long)start, (unsigned long long)end);
+
+ /*
+ * If both edges are on a cluster boundary then there's no
+ * zeroing required as the region is part of the allocation to
+ * be truncated.
+ */
+ if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
+ goto out;
+
+ handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+ if (handle == NULL) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * We want to get the byte offset of the end of the 1st cluster.
+ */
+ tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
+ if (tmpend > end)
+ tmpend = end;
+
+ mlog(0, "1st range: start: %llu, tmpend: %llu\n",
+ (unsigned long long)start, (unsigned long long)tmpend);
+
+ ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
+ if (ret)
+ mlog_errno(ret);
+
+ if (tmpend < end) {
+ /*
+ * This may make start and end equal, but the zeroing
+ * code will skip any work in that case so there's no
+ * need to catch it up here.
+ */
+ start = end & ~(osb->s_clustersize - 1);
+
+ mlog(0, "2nd range: start: %llu, end: %llu\n",
+ (unsigned long long)start, (unsigned long long)end);
+
+ ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
+ if (ret)
+ mlog_errno(ret);
+ }
+
+ ocfs2_commit_trans(osb, handle);
+out:
+ return ret;
+}
+
+static int ocfs2_remove_inode_range(struct inode *inode,
+ struct buffer_head *di_bh, u64 byte_start,
+ u64 byte_len)
+{
+ int ret = 0;
+ u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_cached_dealloc_ctxt dealloc;
+
+ ocfs2_init_dealloc_ctxt(&dealloc);
+
+ if (byte_len == 0)
+ return 0;
+
+ trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
+ trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
+ if (trunc_len >= trunc_start)
+ trunc_len -= trunc_start;
+ else
+ trunc_len = 0;
+
+ mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ (unsigned long long)byte_start,
+ (unsigned long long)byte_len, trunc_start, trunc_len);
+
+ ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ cpos = trunc_start;
+ while (trunc_len) {
+ ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
+ &alloc_size, NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (alloc_size > trunc_len)
+ alloc_size = trunc_len;
+
+ /* Only do work for non-holes */
+ if (phys_cpos != 0) {
+ ret = __ocfs2_remove_inode_range(inode, di_bh, cpos,
+ phys_cpos, alloc_size,
+ &dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ cpos += alloc_size;
+ trunc_len -= alloc_size;
+ }
+
+ ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
+
+out:
+ ocfs2_schedule_truncate_log_flush(osb, 1);
+ ocfs2_run_deallocs(osb, &dealloc);
+
+ return ret;
+}
+
+/*
+ * Parts of this function taken from xfs_change_file_space()
+ */
+int ocfs2_change_file_space(struct file *file, unsigned int cmd,
+ struct ocfs2_space_resv *sr)
+{
+ int ret;
+ s64 llen;
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct buffer_head *di_bh = NULL;
+ handle_t *handle;
+ unsigned long long max_off = ocfs2_max_file_offset(inode->i_sb->s_blocksize_bits);
+
+ if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
+ !ocfs2_writes_unwritten_extents(osb))
+ return -ENOTTY;
+ else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
+ !ocfs2_sparse_alloc(osb))
+ return -ENOTTY;
+
+ if (!S_ISREG(inode->i_mode))
+ return -EINVAL;
+
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+ return -EROFS;
+
+ mutex_lock(&inode->i_mutex);
+
+ /*
+ * This prevents concurrent writes on other nodes
+ */
+ ret = ocfs2_rw_lock(inode, 1);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_meta_lock(inode, &di_bh, 1);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_rw_unlock;
+ }
+
+ if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
+ ret = -EPERM;
+ goto out_meta_unlock;
+ }
+
+ switch (sr->l_whence) {
+ case 0: /*SEEK_SET*/
+ break;
+ case 1: /*SEEK_CUR*/
+ sr->l_start += file->f_pos;
+ break;
+ case 2: /*SEEK_END*/
+ sr->l_start += i_size_read(inode);
+ break;
+ default:
+ ret = -EINVAL;
+ goto out_meta_unlock;
+ }
+ sr->l_whence = 0;
+
+ llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
+
+ if (sr->l_start < 0
+ || sr->l_start > max_off
+ || (sr->l_start + llen) < 0
+ || (sr->l_start + llen) > max_off) {
+ ret = -EINVAL;
+ goto out_meta_unlock;
+ }
+
+ if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
+ if (sr->l_len <= 0) {
+ ret = -EINVAL;
+ goto out_meta_unlock;
+ }
+ }
+
+ if (should_remove_suid(file->f_path.dentry)) {
+ ret = __ocfs2_write_remove_suid(inode, di_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_meta_unlock;
+ }
+ }
+
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+ switch (cmd) {
+ case OCFS2_IOC_RESVSP:
+ case OCFS2_IOC_RESVSP64:
+ /*
+ * This takes unsigned offsets, but the signed ones we
+ * pass have been checked against overflow above.
+ */
+ ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
+ sr->l_len);
+ break;
+ case OCFS2_IOC_UNRESVSP:
+ case OCFS2_IOC_UNRESVSP64:
+ ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
+ sr->l_len);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_meta_unlock;
+ }
+
+ /*
+ * We update c/mtime for these changes
+ */
+ handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out_meta_unlock;
+ }
+
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+ ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
+ if (ret < 0)
+ mlog_errno(ret);
+
+ ocfs2_commit_trans(osb, handle);
+
+out_meta_unlock:
+ brelse(di_bh);
+ ocfs2_meta_unlock(inode, 1);
+out_rw_unlock:
+ ocfs2_rw_unlock(inode, 1);
+
+ mutex_unlock(&inode->i_mutex);
+out:
+ return ret;
+}
+
static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
loff_t *ppos,
size_t count,
*basep = base;
}
-static struct page * ocfs2_get_write_source(struct ocfs2_buffered_write_priv *bp,
+static struct page * ocfs2_get_write_source(char **ret_src_buf,
const struct iovec *cur_iov,
size_t iov_offset)
{
int ret;
- char *buf;
+ char *buf = cur_iov->iov_base + iov_offset;
struct page *src_page = NULL;
+ unsigned long off;
- buf = cur_iov->iov_base + iov_offset;
+ off = (unsigned long)(buf) & ~PAGE_CACHE_MASK;
if (!segment_eq(get_fs(), KERNEL_DS)) {
/*
(unsigned long)buf & PAGE_CACHE_MASK, 1,
0, 0, &src_page, NULL);
if (ret == 1)
- bp->b_src_buf = kmap(src_page);
+ *ret_src_buf = kmap(src_page) + off;
else
src_page = ERR_PTR(-EFAULT);
} else {
- bp->b_src_buf = buf;
+ *ret_src_buf = buf;
}
return src_page;
}
-static void ocfs2_put_write_source(struct ocfs2_buffered_write_priv *bp,
- struct page *page)
+static void ocfs2_put_write_source(struct page *page)
{
if (page) {
kunmap(page);
{
int ret = 0;
ssize_t copied, total = 0;
- size_t iov_offset = 0;
+ size_t iov_offset = 0, bytes;
+ loff_t pos;
const struct iovec *cur_iov = iov;
- struct ocfs2_buffered_write_priv bp;
- struct page *page;
+ struct page *user_page, *page;
+ char *buf, *dst;
+ void *fsdata;
/*
* handle partial DIO write. Adjust cur_iov if needed.
ocfs2_set_next_iovec(&cur_iov, &iov_offset, o_direct_written);
do {
- bp.b_cur_off = iov_offset;
- bp.b_cur_iov = cur_iov;
+ pos = *ppos;
- page = ocfs2_get_write_source(&bp, cur_iov, iov_offset);
- if (IS_ERR(page)) {
- ret = PTR_ERR(page);
+ user_page = ocfs2_get_write_source(&buf, cur_iov, iov_offset);
+ if (IS_ERR(user_page)) {
+ ret = PTR_ERR(user_page);
goto out;
}
- copied = ocfs2_buffered_write_cluster(file, *ppos, count,
- ocfs2_map_and_write_user_data,
- &bp);
+ /* Stay within our page boundaries */
+ bytes = min((PAGE_CACHE_SIZE - ((unsigned long)pos & ~PAGE_CACHE_MASK)),
+ (PAGE_CACHE_SIZE - ((unsigned long)buf & ~PAGE_CACHE_MASK)));
+ /* Stay within the vector boundary */
+ bytes = min_t(size_t, bytes, cur_iov->iov_len - iov_offset);
+ /* Stay within count */
+ bytes = min(bytes, count);
+
+ page = NULL;
+ ret = ocfs2_write_begin(file, file->f_mapping, pos, bytes, 0,
+ &page, &fsdata);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- ocfs2_put_write_source(&bp, page);
+ dst = kmap_atomic(page, KM_USER0);
+ memcpy(dst + (pos & (PAGE_CACHE_SIZE - 1)), buf, bytes);
+ kunmap_atomic(dst, KM_USER0);
+ flush_dcache_page(page);
+ ocfs2_put_write_source(user_page);
+ copied = ocfs2_write_end(file, file->f_mapping, pos, bytes,
+ bytes, page, fsdata);
if (copied < 0) {
mlog_errno(copied);
ret = copied;
}
total += copied;
- *ppos = *ppos + copied;
+ *ppos = pos + copied;
count -= copied;
ocfs2_set_next_iovec(&cur_iov, &iov_offset, copied);
struct pipe_buffer *buf,
struct splice_desc *sd)
{
- int ret, count, total = 0;
+ int ret, count;
ssize_t copied = 0;
- struct ocfs2_splice_write_priv sp;
+ struct file *file = sd->u.file;
+ unsigned int offset;
+ struct page *page = NULL;
+ void *fsdata;
+ char *src, *dst;
ret = buf->ops->confirm(pipe, buf);
if (ret)
goto out;
- sp.s_sd = sd;
- sp.s_buf = buf;
- sp.s_pipe = pipe;
- sp.s_offset = sd->pos & ~PAGE_CACHE_MASK;
- sp.s_buf_offset = buf->offset;
-
+ offset = sd->pos & ~PAGE_CACHE_MASK;
count = sd->len;
- if (count + sp.s_offset > PAGE_CACHE_SIZE)
- count = PAGE_CACHE_SIZE - sp.s_offset;
+ if (count + offset > PAGE_CACHE_SIZE)
+ count = PAGE_CACHE_SIZE - offset;
- do {
- /*
- * splice wants us to copy up to one page at a
- * time. For pagesize > cluster size, this means we
- * might enter ocfs2_buffered_write_cluster() more
- * than once, so keep track of our progress here.
- */
- copied = ocfs2_buffered_write_cluster(sd->u.file,
- (loff_t)sd->pos + total,
- count,
- ocfs2_map_and_write_splice_data,
- &sp);
- if (copied < 0) {
- mlog_errno(copied);
- ret = copied;
- goto out;
- }
+ ret = ocfs2_write_begin(file, file->f_mapping, sd->pos, count, 0,
+ &page, &fsdata);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- count -= copied;
- sp.s_offset += copied;
- sp.s_buf_offset += copied;
- total += copied;
- } while (count);
+ src = buf->ops->map(pipe, buf, 1);
+ dst = kmap_atomic(page, KM_USER1);
+ memcpy(dst + offset, src + buf->offset, count);
+ kunmap_atomic(page, KM_USER1);
+ buf->ops->unmap(pipe, buf, src);
- ret = 0;
+ copied = ocfs2_write_end(file, file->f_mapping, sd->pos, count, count,
+ page, fsdata);
+ if (copied < 0) {
+ mlog_errno(copied);
+ ret = copied;
+ goto out;
+ }
out:
- return total ? total : ret;
+ return copied ? copied : ret;
}
static ssize_t __ocfs2_file_splice_write(struct pipe_inode_info *pipe,
git.samba.org / sfrench / cifs-2.6.git / blobdiff