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-rw-r--r--fs/dax.c77
-rw-r--r--fs/ext2/inode.c7
-rw-r--r--fs/ext4/inode.c5
-rw-r--r--fs/iomap/buffered-io.c35
-rw-r--r--fs/xfs/xfs_iomap.c7
-rw-r--r--include/linux/dax.h7
6 files changed, 94 insertions, 44 deletions
diff --git a/fs/dax.c b/fs/dax.c
index d5db1297a0bb..43d58b4219fd 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1135,24 +1135,73 @@ static int dax_memzero(struct dax_device *dax_dev, pgoff_t pgoff,
return ret;
}
-s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap)
+static s64 dax_zero_iter(struct iomap_iter *iter, bool *did_zero)
{
- pgoff_t pgoff = dax_iomap_pgoff(iomap, pos);
- long rc, id;
- unsigned offset = offset_in_page(pos);
- unsigned size = min_t(u64, PAGE_SIZE - offset, length);
+ const struct iomap *iomap = &iter->iomap;
+ const struct iomap *srcmap = iomap_iter_srcmap(iter);
+ loff_t pos = iter->pos;
+ u64 length = iomap_length(iter);
+ s64 written = 0;
+
+ /* already zeroed? we're done. */
+ if (srcmap->type == IOMAP_HOLE || srcmap->type == IOMAP_UNWRITTEN)
+ return length;
+
+ do {
+ unsigned offset = offset_in_page(pos);
+ unsigned size = min_t(u64, PAGE_SIZE - offset, length);
+ pgoff_t pgoff = dax_iomap_pgoff(iomap, pos);
+ long rc;
+ int id;
- id = dax_read_lock();
- if (IS_ALIGNED(pos, PAGE_SIZE) && size == PAGE_SIZE)
- rc = dax_zero_page_range(iomap->dax_dev, pgoff, 1);
- else
- rc = dax_memzero(iomap->dax_dev, pgoff, offset, size);
- dax_read_unlock(id);
+ id = dax_read_lock();
+ if (IS_ALIGNED(pos, PAGE_SIZE) && size == PAGE_SIZE)
+ rc = dax_zero_page_range(iomap->dax_dev, pgoff, 1);
+ else
+ rc = dax_memzero(iomap->dax_dev, pgoff, offset, size);
+ dax_read_unlock(id);
- if (rc < 0)
- return rc;
- return size;
+ if (rc < 0)
+ return rc;
+ pos += size;
+ length -= size;
+ written += size;
+ if (did_zero)
+ *did_zero = true;
+ } while (length > 0);
+
+ return written;
+}
+
+int dax_zero_range(struct inode *inode, loff_t pos, loff_t len, bool *did_zero,
+ const struct iomap_ops *ops)
+{
+ struct iomap_iter iter = {
+ .inode = inode,
+ .pos = pos,
+ .len = len,
+ .flags = IOMAP_ZERO,
+ };
+ int ret;
+
+ while ((ret = iomap_iter(&iter, ops)) > 0)
+ iter.processed = dax_zero_iter(&iter, did_zero);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dax_zero_range);
+
+int dax_truncate_page(struct inode *inode, loff_t pos, bool *did_zero,
+ const struct iomap_ops *ops)
+{
+ unsigned int blocksize = i_blocksize(inode);
+ unsigned int off = pos & (blocksize - 1);
+
+ /* Block boundary? Nothing to do */
+ if (!off)
+ return 0;
+ return dax_zero_range(inode, pos, blocksize - off, did_zero, ops);
}
+EXPORT_SYMBOL_GPL(dax_truncate_page);
static loff_t dax_iomap_iter(const struct iomap_iter *iomi,
struct iov_iter *iter)
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 333fa62661d5..01d69618277d 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -36,6 +36,7 @@
#include <linux/iomap.h>
#include <linux/namei.h>
#include <linux/uio.h>
+#include <linux/dax.h>
#include "ext2.h"
#include "acl.h"
#include "xattr.h"
@@ -1297,9 +1298,9 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
inode_dio_wait(inode);
if (IS_DAX(inode)) {
- error = iomap_zero_range(inode, newsize,
- PAGE_ALIGN(newsize) - newsize, NULL,
- &ext2_iomap_ops);
+ error = dax_zero_range(inode, newsize,
+ PAGE_ALIGN(newsize) - newsize, NULL,
+ &ext2_iomap_ops);
} else if (test_opt(inode->i_sb, NOBH))
error = nobh_truncate_page(inode->i_mapping,
newsize, ext2_get_block);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index bfd3545f1e5d..d316a2009489 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -41,6 +41,7 @@
#include <linux/bitops.h>
#include <linux/iomap.h>
#include <linux/iversion.h>
+#include <linux/dax.h>
#include "ext4_jbd2.h"
#include "xattr.h"
@@ -3780,8 +3781,8 @@ static int ext4_block_zero_page_range(handle_t *handle,
length = max;
if (IS_DAX(inode)) {
- return iomap_zero_range(inode, from, length, NULL,
- &ext4_iomap_ops);
+ return dax_zero_range(inode, from, length, NULL,
+ &ext4_iomap_ops);
}
return __ext4_block_zero_page_range(handle, mapping, from, length);
}
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 1753c26c8e76..b1511255b4df 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -870,26 +870,8 @@ iomap_file_unshare(struct inode *inode, loff_t pos, loff_t len,
}
EXPORT_SYMBOL_GPL(iomap_file_unshare);
-static s64 __iomap_zero_iter(struct iomap_iter *iter, loff_t pos, u64 length)
-{
- struct page *page;
- int status;
- unsigned offset = offset_in_page(pos);
- unsigned bytes = min_t(u64, PAGE_SIZE - offset, length);
-
- status = iomap_write_begin(iter, pos, bytes, &page);
- if (status)
- return status;
-
- zero_user(page, offset, bytes);
- mark_page_accessed(page);
-
- return iomap_write_end(iter, pos, bytes, bytes, page);
-}
-
static loff_t iomap_zero_iter(struct iomap_iter *iter, bool *did_zero)
{
- struct iomap *iomap = &iter->iomap;
const struct iomap *srcmap = iomap_iter_srcmap(iter);
loff_t pos = iter->pos;
loff_t length = iomap_length(iter);
@@ -900,12 +882,19 @@ static loff_t iomap_zero_iter(struct iomap_iter *iter, bool *did_zero)
return length;
do {
- s64 bytes;
+ unsigned offset = offset_in_page(pos);
+ size_t bytes = min_t(u64, PAGE_SIZE - offset, length);
+ struct page *page;
+ int status;
- if (IS_DAX(iter->inode))
- bytes = dax_iomap_zero(pos, length, iomap);
- else
- bytes = __iomap_zero_iter(iter, pos, length);
+ status = iomap_write_begin(iter, pos, bytes, &page);
+ if (status)
+ return status;
+
+ zero_user(page, offset, bytes);
+ mark_page_accessed(page);
+
+ bytes = iomap_write_end(iter, pos, bytes, bytes, page);
if (bytes < 0)
return bytes;
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index d6d71ae9f2ae..6a0c3b307bd7 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -28,7 +28,6 @@
#include "xfs_dquot.h"
#include "xfs_reflink.h"
-
#define XFS_ALLOC_ALIGN(mp, off) \
(((off) >> mp->m_allocsize_log) << mp->m_allocsize_log)
@@ -1321,6 +1320,9 @@ xfs_zero_range(
{
struct inode *inode = VFS_I(ip);
+ if (IS_DAX(inode))
+ return dax_zero_range(inode, pos, len, did_zero,
+ &xfs_buffered_write_iomap_ops);
return iomap_zero_range(inode, pos, len, did_zero,
&xfs_buffered_write_iomap_ops);
}
@@ -1333,6 +1335,9 @@ xfs_truncate_page(
{
struct inode *inode = VFS_I(ip);
+ if (IS_DAX(inode))
+ return dax_truncate_page(inode, pos, did_zero,
+ &xfs_buffered_write_iomap_ops);
return iomap_truncate_page(inode, pos, did_zero,
&xfs_buffered_write_iomap_ops);
}
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 324363b798ec..b79036743e7f 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -14,6 +14,7 @@ typedef unsigned long dax_entry_t;
struct dax_device;
struct gendisk;
struct iomap_ops;
+struct iomap_iter;
struct iomap;
struct dax_operations {
@@ -170,6 +171,11 @@ static inline void dax_unlock_page(struct page *page, dax_entry_t cookie)
}
#endif
+int dax_zero_range(struct inode *inode, loff_t pos, loff_t len, bool *did_zero,
+ const struct iomap_ops *ops);
+int dax_truncate_page(struct inode *inode, loff_t pos, bool *did_zero,
+ const struct iomap_ops *ops);
+
#if IS_ENABLED(CONFIG_DAX)
int dax_read_lock(void);
void dax_read_unlock(int id);
@@ -204,7 +210,6 @@ vm_fault_t dax_finish_sync_fault(struct vm_fault *vmf,
int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
pgoff_t index);
-s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap);
static inline bool dax_mapping(struct address_space *mapping)
{
return mapping->host && IS_DAX(mapping->host);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 11:02:54 +0000