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authorRoss Zwisler <zwisler@chromium.org>2019-06-20 17:05:37 -0400
committerTheodore Ts'o <tytso@mit.edu>2019-06-20 17:05:37 -0400
commitaa0bfcd939c30617385ffa28682c062d78050eba (patch)
treeeab7b4e883e4045c94a24d7a1bdf13b579dc0759 /mm/filemap.c
parentc708b1c6de7f996b073bb3296af17f37881a09de (diff)
downloadlinux-aa0bfcd939c30617385ffa28682c062d78050eba.tar.bz2
mm: add filemap_fdatawait_range_keep_errors()
In the spirit of filemap_fdatawait_range() and filemap_fdatawait_keep_errors(), introduce filemap_fdatawait_range_keep_errors() which both takes a range upon which to wait and does not clear errors from the address space. Signed-off-by: Ross Zwisler <zwisler@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
Diffstat (limited to 'mm/filemap.c')
-rw-r--r--mm/filemap.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index df2006ba0cfa..e87252ca0835 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -554,6 +554,28 @@ int filemap_fdatawait_range(struct address_space *mapping, loff_t start_byte,
EXPORT_SYMBOL(filemap_fdatawait_range);
/**
+ * filemap_fdatawait_range_keep_errors - wait for writeback to complete
+ * @mapping: address space structure to wait for
+ * @start_byte: offset in bytes where the range starts
+ * @end_byte: offset in bytes where the range ends (inclusive)
+ *
+ * Walk the list of under-writeback pages of the given address space in the
+ * given range and wait for all of them. Unlike filemap_fdatawait_range(),
+ * this function does not clear error status of the address space.
+ *
+ * Use this function if callers don't handle errors themselves. Expected
+ * call sites are system-wide / filesystem-wide data flushers: e.g. sync(2),
+ * fsfreeze(8)
+ */
+int filemap_fdatawait_range_keep_errors(struct address_space *mapping,
+ loff_t start_byte, loff_t end_byte)
+{
+ __filemap_fdatawait_range(mapping, start_byte, end_byte);
+ return filemap_check_and_keep_errors(mapping);
+}
+EXPORT_SYMBOL(filemap_fdatawait_range_keep_errors);
+
+/**
* file_fdatawait_range - wait for writeback to complete
* @file: file pointing to address space structure to wait for
* @start_byte: offset in bytes where the range starts