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From 1328926a705fdb4728c1f255dd368de928736d39 Mon Sep 17 00:00:00 2001
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From: Kamil Dudka <kdudka@redhat.com>
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Date: Fri, 25 Sep 2015 16:09:39 +0200
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Subject: [PATCH 1/2] fts: introduce the FTS_NOLEAF flag
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The flag is needed to implement the -noleaf option of find.
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* lib/fts.c (link_count_optimize_ok): Implement the FTS_NOLEAF flag.
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* lib/fts_.h (FTS_NOLEAF): New macro, shifted conflicting constants.
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---
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gl/lib/fts.c | 4 ++++
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gl/lib/fts_.h | 12 +++++++++---
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2 files changed, 13 insertions(+), 3 deletions(-)
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diff --git a/gl/lib/fts.c b/gl/lib/fts.c
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index d2d404f..808466f 100644
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--- a/gl/lib/fts.c
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+++ b/gl/lib/fts.c
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@@ -736,6 +736,10 @@ filesystem_type (FTSENT const *p)
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struct dev_type *ent;
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struct statfs fs_buf;
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+ if (ISSET(FTS_NOLEAF))
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+ /* leaf optimization explicitly disabled by the FTS_NOLEAF flag */
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+ return 0;
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+
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/* If we're not in CWDFD mode, don't bother with this optimization,
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since the caller is not serious about performance. */
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if (!ISSET (FTS_CWDFD))
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diff --git a/gl/lib/fts_.h b/gl/lib/fts_.h
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index 63d4b74..f1d519b 100644
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--- a/gl/lib/fts_.h
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+++ b/gl/lib/fts_.h
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@@ -155,10 +155,16 @@ typedef struct {
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from input path names during fts_open initialization. */
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# define FTS_VERBATIM 0x1000
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-# define FTS_OPTIONMASK 0x1fff /* valid user option mask */
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+ /* Disable leaf optimization (which eliminates stat() calls during traversal,
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+ based on the count of nested directories stored in stat.st_nlink of each
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+ directory). Note that the optimization is by default enabled only for
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+ selected file systems, and only if the FTS_CWDFD flag is set. */
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+# define FTS_NOLEAF 0x2000
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-# define FTS_NAMEONLY 0x2000 /* (private) child names only */
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-# define FTS_STOP 0x4000 /* (private) unrecoverable error */
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+# define FTS_OPTIONMASK 0x3fff /* valid user option mask */
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+
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+# define FTS_NAMEONLY 0x4000 /* (private) child names only */
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+# define FTS_STOP 0x8000 /* (private) unrecoverable error */
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int fts_options; /* fts_open options, global flags */
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/* Map a directory's device number to a boolean. The boolean is
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--
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2.5.0
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From c186934e6e37ddadf7511abb9b1045192757618e Mon Sep 17 00:00:00 2001
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From: Kamil Dudka <kdudka@redhat.com>
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Date: Fri, 25 Sep 2015 19:13:15 +0200
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Subject: [PATCH 2/2] ftsfind: propagate the -noleaf option to FTS
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* find/ftsfind.c (find): Propagate the -noleaf option to FTS.
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---
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find/ftsfind.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/find/ftsfind.c b/find/ftsfind.c
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index 5159470..e34b672 100644
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--- a/find/ftsfind.c
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+++ b/find/ftsfind.c
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@@ -559,6 +559,9 @@ find (char *arg)
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if (options.stay_on_filesystem)
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ftsoptions |= FTS_XDEV;
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+ if (options.no_leaf_check)
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+ ftsoptions |= FTS_NOLEAF;
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+
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p = fts_open (arglist, ftsoptions, NULL);
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if (NULL == p)
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{
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--
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2.5.0
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