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| author | Philip Withnall <pwithnall@endlessos.org> | 2023-03-17 13:16:02 +0000 |
|---|---|---|
| committer | Philip Withnall <pwithnall@endlessos.org> | 2023-05-09 13:53:44 +0100 |
| commit | 0da948a5d13faa9d39c2170125edf51bdce301aa (patch) | |
| tree | 3eaa48f935d22972affc7f2bfc9dd63680e7223b | |
| parent | 63e1e83c339aab6f2c48f6bb6a68fc6197510ce9 (diff) | |
| download | glib-0da948a5d13faa9d39c2170125edf51bdce301aa.tar.gz | |
gfile: Eliminate a stat() call from the file copy code
The start of the `g_file_copy()` implementation stats the source file to
find all the attributes to copy onto the destination file, so it makes
sense to get it to store the source file size at the same time.
This saves a subsequent `stat()` call on the source FD in the btrfs
reflink or splice code. Every little helps.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
| -rw-r--r-- | gio/gfile.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/gio/gfile.c b/gio/gfile.c index 94786c84a..4558f2d3b 100644 --- a/gio/gfile.c +++ b/gio/gfile.c @@ -2807,6 +2807,11 @@ g_file_build_attribute_list_for_copy (GFile *file, first = TRUE; s = g_string_new (""); + /* Always query the source file size, even though we can’t set that on the + * destination. This is useful for the copy functions. */ + first = FALSE; + g_string_append (s, G_FILE_ATTRIBUTE_STANDARD_SIZE); + if (attributes) { for (i = 0; i < attributes->n_infos; i++) @@ -3042,6 +3047,7 @@ retry: static gboolean splice_stream_with_progress (GInputStream *in, + GFileInfo *in_info, GOutputStream *out, GCancellable *cancellable, GFileProgressCallback progress_callback, @@ -3085,10 +3091,8 @@ splice_stream_with_progress (GInputStream *in, /* avoid performance impact of querying total size when it's not needed */ if (progress_callback) { - struct stat sbuf; - - if (fstat (fd_in, &sbuf) == 0) - total_size = sbuf.st_size; + g_assert (g_file_info_has_attribute (in_info, G_FILE_ATTRIBUTE_STANDARD_SIZE)); + total_size = g_file_info_get_size (in_info); } if (total_size == -1) @@ -3151,6 +3155,7 @@ splice_stream_with_progress (GInputStream *in, #ifdef __linux__ static gboolean btrfs_reflink_with_progress (GInputStream *in, + GFileInfo *in_info, GOutputStream *out, GFileInfo *info, GCancellable *cancellable, @@ -3169,10 +3174,8 @@ btrfs_reflink_with_progress (GInputStream *in, /* avoid performance impact of querying total size when it's not needed */ if (progress_callback) { - struct stat sbuf; - - if (fstat (fd_in, &sbuf) == 0) - total_size = sbuf.st_size; + g_assert (g_file_info_has_attribute (in_info, G_FILE_ATTRIBUTE_STANDARD_SIZE)); + total_size = g_file_info_get_size (in_info); } if (total_size == -1) @@ -3376,7 +3379,7 @@ file_copy_fallback (GFile *source, { GError *reflink_err = NULL; - if (!btrfs_reflink_with_progress (in, out, info, cancellable, + if (!btrfs_reflink_with_progress (in, info, out, info, cancellable, progress_callback, progress_callback_data, &reflink_err)) { @@ -3403,7 +3406,7 @@ file_copy_fallback (GFile *source, { GError *splice_err = NULL; - if (!splice_stream_with_progress (in, out, cancellable, + if (!splice_stream_with_progress (in, info, out, cancellable, progress_callback, progress_callback_data, &splice_err)) { |