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[PATCH 2/6] xfstests: Add fallocate zero range operation to fsstress

To: linux-ext4@xxxxxxxxxxxxxxx
Subject: [PATCH 2/6] xfstests: Add fallocate zero range operation to fsstress
From: Lukas Czerner <lczerner@xxxxxxxxxx>
Date: Tue, 25 Feb 2014 20:15:24 +0100
Cc: xfs@xxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Lukas Czerner <lczerner@xxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1393355728-12056-1-git-send-email-lczerner@xxxxxxxxxx>
References: <1393355728-12056-1-git-send-email-lczerner@xxxxxxxxxx>
Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx>
---
 ltp/fsstress.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/ltp/fsstress.c b/ltp/fsstress.c
index c56f168..4c3368f 100644
--- a/ltp/fsstress.c
+++ b/ltp/fsstress.c
@@ -33,6 +33,9 @@
 /* Copy-paste from linux/falloc.h */
 #define FALLOC_FL_PUNCH_HOLE    0x02 /* de-allocates range */
 #endif
+#ifndef FALLOC_FL_ZERO_RANGE
+#define FALLOC_FL_ZERO_RANGE    0x10 /* zeroes range */
+#endif
 #endif
 #ifndef HAVE_ATTR_LIST
 #define attr_list(path, buf, size, flags, cursor) (errno = -ENOSYS, -1)
@@ -77,6 +80,7 @@ typedef enum {
        OP_MKDIR,
        OP_MKNOD,
        OP_PUNCH,
+       OP_ZERO,
        OP_READ,
        OP_READLINK,
        OP_RENAME,
@@ -162,6 +166,7 @@ void        link_f(int, long);
 void   mkdir_f(int, long);
 void   mknod_f(int, long);
 void   punch_f(int, long);
+void   zero_f(int, long);
 void   read_f(int, long);
 void   readlink_f(int, long);
 void   rename_f(int, long);
@@ -199,6 +204,7 @@ opdesc_t    ops[] = {
        { OP_MKDIR, "mkdir", mkdir_f, 2, 1 },
        { OP_MKNOD, "mknod", mknod_f, 2, 1 },
        { OP_PUNCH, "punch", punch_f, 1, 1 },
+       { OP_ZERO, "zero", zero_f, 1, 1 },
        { OP_READ, "read", read_f, 1, 0 },
        { OP_READLINK, "readlink", readlink_f, 1, 0 },
        { OP_RENAME, "rename", rename_f, 2, 1 },
@@ -2561,6 +2567,62 @@ punch_f(int opno, long r)
 }
 
 void
+zero_f(int opno, long r)
+{
+#ifdef FALLOCATE
+       int             e;
+       pathname_t      f;
+       int             fd;
+       __int64_t       lr;
+       off64_t         off;
+       off64_t         len;
+       struct stat64   stb;
+       int             v;
+       char            st[1024];
+       int mode = FALLOC_FL_ZERO_RANGE;
+
+       init_pathname(&f);
+       if (!get_fname(FT_REGFILE, r, &f, NULL, NULL, &v)) {
+               if (v)
+                       printf("%d/%d: zero range - no filename\n", procid, 
opno);
+               free_pathname(&f);
+               return;
+       }
+       fd = open_path(&f, O_RDWR);
+       e = fd < 0 ? errno : 0;
+       check_cwd();
+       if (fd < 0) {
+               if (v)
+                       printf("%d/%d: zero range - open %s failed %d\n",
+                               procid, opno, f.path, e);
+               free_pathname(&f);
+               return;
+       }
+       if (fstat64(fd, &stb) < 0) {
+               if (v)
+                       printf("%d/%d: zero range - fstat64 %s failed %d\n",
+                               procid, opno, f.path, errno);
+               free_pathname(&f);
+               close(fd);
+               return;
+       }
+       inode_info(st, sizeof(st), &stb, v);
+       lr = ((__int64_t)random() << 32) + random();
+       off = (off64_t)(lr % MIN(stb.st_size + (1024 * 1024), MAXFSIZE));
+       off %= maxfsize;
+       len = (off64_t)(random() % (1024 * 1024));
+       mode |= FALLOC_FL_KEEP_SIZE & random();
+       e = fallocate(fd, mode, (loff_t)off, (loff_t)len) < 0 ? errno : 0;
+       if (v)
+               printf("%d/%d: zero range(%d) %s %s %lld %lld %d\n",
+                      procid, opno, mode,
+                      f.path, st, (long long)off, (long long)len, e);
+       free_pathname(&f);
+       close(fd);
+#endif
+}
+
+void
 read_f(int opno, long r)
 {
        char            *buf;
-- 
1.8.3.1

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