#include "xattr.h"
#include "acl.h"
#include "quota.h"
+#include "refcounttree.h"
#include "buffer_head_io.h"
goto out;
}
- ret = ocfs2_journal_access_di(handle, inode, bh,
+ ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
return ret;
}
+static int ocfs2_cow_file_pos(struct inode *inode,
+ struct buffer_head *fe_bh,
+ u64 offset)
+{
+ int status;
+ u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
+ unsigned int num_clusters = 0;
+ unsigned int ext_flags = 0;
+
+ /*
+ * If the new offset is aligned to the range of the cluster, there is
+ * no space for ocfs2_zero_range_for_truncate to fill, so no need to
+ * CoW either.
+ */
+ if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0)
+ return 0;
+
+ status = ocfs2_get_clusters(inode, cpos, &phys,
+ &num_clusters, &ext_flags);
+ if (status) {
+ mlog_errno(status);
+ goto out;
+ }
+
+ if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
+ goto out;
+
+ return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1);
+
+out:
+ return status;
+}
+
static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
struct inode *inode,
struct buffer_head *fe_bh,
mlog_entry_void();
+ /*
+ * We need to CoW the cluster contains the offset if it is reflinked
+ * since we will call ocfs2_zero_range_for_truncate later which will
+ * write "0" from offset to the end of the cluster.
+ */
+ status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
+ if (status) {
+ mlog_errno(status);
+ return status;
+ }
+
/* TODO: This needs to actually orphan the inode in this
* transaction. */
goto out;
}
- status = ocfs2_journal_access_di(handle, inode, fe_bh,
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
up_write(&OCFS2_I(inode)->ip_alloc_sem);
bail:
+ if (!status && OCFS2_I(inode)->ip_clusters == 0)
+ status = ocfs2_try_remove_refcount_tree(inode, di_bh);
mlog_exit(status);
return status;
int ret;
struct ocfs2_extent_tree et;
- ocfs2_init_dinode_extent_tree(&et, inode, fe_bh);
- ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
- clusters_to_add, mark_unwritten,
- &et, handle,
- data_ac, meta_ac, reason_ret);
+ ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh);
+ ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
+ clusters_to_add, mark_unwritten,
+ data_ac, meta_ac, reason_ret);
return ret;
}
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
clusters_to_add);
- ocfs2_init_dinode_extent_tree(&et, inode, bh);
+ ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh);
status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
&data_ac, &meta_ac);
if (status) {
/* reserve a write to the file entry early on - that we if we
* run out of credits in the allocation path, we can still
* update i_size. */
- status = ocfs2_journal_access_di(handle, inode, bh,
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out;
}
- ret = ocfs2_journal_access_di(handle, inode, bh,
+ ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
mlog_errno(ret);
struct address_space *mapping = inode->i_mapping;
struct ocfs2_extent_tree et;
- ocfs2_init_dinode_extent_tree(&et, inode, di_bh);
+ ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
ocfs2_init_dealloc_ctxt(&dealloc);
if (byte_len == 0)
OCFS2_IOC_RESVSP64, &sr, change_size);
}
+int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
+ size_t count)
+{
+ int ret = 0;
+ unsigned int extent_flags;
+ u32 cpos, clusters, extent_len, phys_cpos;
+ struct super_block *sb = inode->i_sb;
+
+ if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
+ !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL))
+ return 0;
+
+ cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
+ clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
+
+ while (clusters) {
+ ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
+ &extent_flags);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
+ ret = 1;
+ break;
+ }
+
+ if (extent_len > clusters)
+ extent_len = clusters;
+
+ clusters -= extent_len;
+ cpos += extent_len;
+ }
+out:
+ return ret;
+}
+
+static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
+ loff_t pos, size_t count,
+ int *meta_level)
+{
+ int ret;
+ struct buffer_head *di_bh = NULL;
+ u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
+ u32 clusters =
+ ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;
+
+ ret = ocfs2_inode_lock(inode, &di_bh, 1);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ *meta_level = 1;
+
+ ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX);
+ if (ret)
+ mlog_errno(ret);
+out:
+ brelse(di_bh);
+ return ret;
+}
+
static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
loff_t *ppos,
size_t count,
end = saved_pos + count;
+ ret = ocfs2_check_range_for_refcount(inode, saved_pos, count);
+ if (ret == 1) {
+ ocfs2_inode_unlock(inode, meta_level);
+ meta_level = -1;
+
+ ret = ocfs2_prepare_inode_for_refcount(inode,
+ saved_pos,
+ count,
+ &meta_level);
+ }
+
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out_unlock;
+ }
+
/*
* Skip the O_DIRECT checks if we don't need
* them.
*ppos = saved_pos;
out_unlock:
- ocfs2_inode_unlock(inode, meta_level);
+ if (meta_level >= 0)
+ ocfs2_inode_unlock(inode, meta_level);
out:
return ret;
git.openpandora.org / pandora-kernel.git / blobdiff