The patch titled
Subject: linux-next-rejects
has been removed from the -mm tree. Its filename was
linux-next-rejects.patch
This patch was dropped because it is obsolete
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: linux-next-rejects
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/read_write.c | 139 +++++++---------------------------------------
1 file changed, 23 insertions(+), 116 deletions(-)
--- a/fs/read_write.c~linux-next-rejects
+++ a/fs/read_write.c
@@ -1976,140 +1976,43 @@ loff_t do_clone_file_range(struct file *
(file_out->f_flags & O_APPEND))
return -EBADF;
- if (!file_in->f_op->clone_file_range)
+ if (!file_in->f_op->remap_file_range)
return -EOPNOTSUPP;
- ret = clone_verify_area(file_in, pos_in, len, false);
+ ret = remap_verify_area(file_in, pos_in, len, false);
if (ret)
return ret;
- ret = clone_verify_area(file_out, pos_out, len, true);
+ ret = remap_verify_area(file_out, pos_out, len, true);
if (ret)
return ret;
- if (pos_in + len > i_size_read(inode_in))
- return -EINVAL;
-
- ret = file_in->f_op->clone_file_range(file_in, pos_in,
- file_out, pos_out, len);
- if (!ret) {
- fsnotify_access(file_in);
- fsnotify_modify(file_out);
- }
+ ret = file_in->f_op->remap_file_range(file_in, pos_in,
+ file_out, pos_out, len, remap_flags);
+ if (ret < 0)
+ return ret;
+ fsnotify_access(file_in);
+ fsnotify_modify(file_out);
return ret;
}
EXPORT_SYMBOL(do_clone_file_range);
-int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
- struct file *file_out, loff_t pos_out, u64 len)
+loff_t vfs_clone_file_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ loff_t len, unsigned int remap_flags)
{
- int ret;
+ loff_t ret;
file_start_write(file_out);
- ret = do_clone_file_range(file_in, pos_in, file_out, pos_out, len);
+ ret = do_clone_file_range(file_in, pos_in, file_out, pos_out, len,
+ remap_flags);
file_end_write(file_out);
return ret;
}
EXPORT_SYMBOL(vfs_clone_file_range);
-/*
- * Read a page's worth of file data into the page cache. Return the page
- * locked.
- */
-static struct page *vfs_dedupe_get_page(struct inode *inode, loff_t offset)
-{
- struct address_space *mapping;
- struct page *page;
- pgoff_t n;
-
- n = offset >> PAGE_SHIFT;
- mapping = inode->i_mapping;
- page = read_mapping_page(mapping, n, NULL);
- if (IS_ERR(page))
- return page;
- if (!PageUptodate(page)) {
- put_page(page);
- return ERR_PTR(-EIO);
- }
- lock_page(page);
- return page;
-}
-
-/*
- * Compare extents of two files to see if they are the same.
- * Caller must have locked both inodes to prevent write races.
- */
-int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
- struct inode *dest, loff_t destoff,
- loff_t len, bool *is_same)
-{
- loff_t src_poff;
- loff_t dest_poff;
- void *src_addr;
- void *dest_addr;
- struct page *src_page;
- struct page *dest_page;
- loff_t cmp_len;
- bool same;
- int error;
-
- error = -EINVAL;
- same = true;
- while (len) {
- src_poff = srcoff & (PAGE_SIZE - 1);
- dest_poff = destoff & (PAGE_SIZE - 1);
- cmp_len = min(PAGE_SIZE - src_poff,
- PAGE_SIZE - dest_poff);
- cmp_len = min(cmp_len, len);
- if (cmp_len <= 0)
- goto out_error;
-
- src_page = vfs_dedupe_get_page(src, srcoff);
- if (IS_ERR(src_page)) {
- error = PTR_ERR(src_page);
- goto out_error;
- }
- dest_page = vfs_dedupe_get_page(dest, destoff);
- if (IS_ERR(dest_page)) {
- error = PTR_ERR(dest_page);
- unlock_page(src_page);
- put_page(src_page);
- goto out_error;
- }
- src_addr = kmap_atomic(src_page);
- dest_addr = kmap_atomic(dest_page);
-
- flush_dcache_page(src_page);
- flush_dcache_page(dest_page);
-
- if (memcmp(src_addr + src_poff, dest_addr + dest_poff, cmp_len))
- same = false;
-
- kunmap_atomic(dest_addr);
- kunmap_atomic(src_addr);
- unlock_page(dest_page);
- unlock_page(src_page);
- put_page(dest_page);
- put_page(src_page);
-
- if (!same)
- break;
-
- srcoff += cmp_len;
- destoff += cmp_len;
- len -= cmp_len;
- }
-
- *is_same = same;
- return 0;
-
-out_error:
- return error;
-}
-EXPORT_SYMBOL(vfs_dedupe_file_range_compare);
-
/* Check whether we are allowed to dedupe the destination file */
static bool allow_file_dedupe(struct file *file)
{
@@ -2124,16 +2027,20 @@ static bool allow_file_dedupe(struct fil
return false;
}
-int vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
- struct file *dst_file, loff_t dst_pos, u64 len)
+loff_t vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
+ struct file *dst_file, loff_t dst_pos,
+ loff_t len, unsigned int remap_flags)
{
- s64 ret;
+ loff_t ret;
+
+ WARN_ON_ONCE(remap_flags & ~(REMAP_FILE_DEDUP |
+ REMAP_FILE_CAN_SHORTEN));
ret = mnt_want_write_file(dst_file);
if (ret)
return ret;
- ret = clone_verify_area(dst_file, dst_pos, len, true);
+ ret = remap_verify_area(dst_file, dst_pos, len, true);
if (ret < 0)
goto out_drop_write;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
mm.patch
mm-page_owner-clamp-read-count-to-page_size-fix.patch
memory_hotplug-free-pages-as-higher-order-fix.patch
ipc-allow-boot-time-extension-of-ipcmni-from-32k-to-8m-checkpatch-fixes.patch
linux-next-git-rejects.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
