{ FS_XFLAG_NODEFRAG, "f", "no-defrag" },
{ FS_XFLAG_FILESTREAM, "S", "filestream" },
{ FS_XFLAG_DAX, "x", "dax" },
+ { FS_XFLAG_COWEXTSIZE, "C", "cowextsize" },
{ 0, NULL, NULL }
};
-#define CHATTR_XFLAG_LIST "r"/*p*/"iasAdtPneEfSx"
+#define CHATTR_XFLAG_LIST "r"/*p*/"iasAdtPneEfSxC"
static void
lsattr_help(void)
" f -- do not include this file when defragmenting the filesystem\n"
" S -- enable filestreams allocator for this directory\n"
" x -- Use direct access (DAX) for data in this file\n"
+" C -- for files with shared blocks, observe the inode CoW extent size value\n"
"\n"
" Options:\n"
" -R -- recursively descend (useful when current file is a directory)\n"
" +/-f -- set/clear the no-defrag flag\n"
" +/-S -- set/clear the filestreams allocator flag\n"
" +/-x -- set/clear the direct access (DAX) flag\n"
+" +/-C -- set/clear the CoW extent-size flag\n"
" Note1: user must have certain capabilities to modify immutable/append-only.\n"
" Note2: immutable/append-only files cannot be deleted; removing these files\n"
" requires the immutable/append-only flag to be cleared first.\n"
--- /dev/null
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+/*
+ * If configure didn't find a struct fsxattr with fsx_cowextsize,
+ * disable the only other source (so far) of struct fsxattr. Thus,
+ * build with the internal definition of struct fsxattr, which has
+ * fsx_cowextsize.
+ */
+#include "platform_defs.h"
+#include "command.h"
+#include "init.h"
+#include "io.h"
+#include "input.h"
+#include "path.h"
+
+static cmdinfo_t cowextsize_cmd;
+static long cowextsize;
+
+static void
+cowextsize_help(void)
+{
+ printf(_(
+"\n"
+" report or modify preferred CoW extent size (in bytes) for the current path\n"
+"\n"
+" -R -- recursively descend (useful when current path is a directory)\n"
+" -D -- recursively descend, only modifying cowextsize on directories\n"
+"\n"));
+}
+
+static int
+get_cowextsize(const char *path, int fd)
+{
+ struct fsxattr fsx;
+
+ if ((xfsctl(path, fd, XFS_IOC_FSGETXATTR, &fsx)) < 0) {
+ printf("%s: XFS_IOC_FSGETXATTR %s: %s\n",
+ progname, path, strerror(errno));
+ return 0;
+ }
+ printf("[%u] %s\n", fsx.fsx_cowextsize, path);
+ return 0;
+}
+
+static int
+set_cowextsize(const char *path, int fd, long extsz)
+{
+ struct fsxattr fsx;
+ struct stat64 stat;
+
+ if (fstat64(fd, &stat) < 0) {
+ perror("fstat64");
+ return 0;
+ }
+ if ((xfsctl(path, fd, XFS_IOC_FSGETXATTR, &fsx)) < 0) {
+ printf("%s: XFS_IOC_FSGETXATTR %s: %s\n",
+ progname, path, strerror(errno));
+ return 0;
+ }
+
+ if (S_ISREG(stat.st_mode) || S_ISDIR(stat.st_mode)) {
+ fsx.fsx_xflags |= FS_XFLAG_COWEXTSIZE;
+ } else {
+ printf(_("invalid target file type - file %s\n"), path);
+ return 0;
+ }
+ fsx.fsx_cowextsize = extsz;
+
+ if ((xfsctl(path, fd, XFS_IOC_FSSETXATTR, &fsx)) < 0) {
+ printf("%s: XFS_IOC_FSSETXATTR %s: %s\n",
+ progname, path, strerror(errno));
+ return 0;
+ }
+
+ return 0;
+}
+
+static int
+get_cowextsize_callback(
+ const char *path,
+ const struct stat *stat,
+ int status,
+ struct FTW *data)
+{
+ int fd;
+
+ if (recurse_dir && !S_ISDIR(stat->st_mode))
+ return 0;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, _("%s: cannot open %s: %s\n"),
+ progname, path, strerror(errno));
+ } else {
+ get_cowextsize(path, fd);
+ close(fd);
+ }
+ return 0;
+}
+
+static int
+set_cowextsize_callback(
+ const char *path,
+ const struct stat *stat,
+ int status,
+ struct FTW *data)
+{
+ int fd;
+
+ if (recurse_dir && !S_ISDIR(stat->st_mode))
+ return 0;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, _("%s: cannot open %s: %s\n"),
+ progname, path, strerror(errno));
+ } else {
+ set_cowextsize(path, fd, cowextsize);
+ close(fd);
+ }
+ return 0;
+}
+
+static int
+cowextsize_f(
+ int argc,
+ char **argv)
+{
+ size_t blocksize, sectsize;
+ int c;
+
+ recurse_all = recurse_dir = 0;
+ init_cvtnum(&blocksize, §size);
+ while ((c = getopt(argc, argv, "DR")) != EOF) {
+ switch (c) {
+ case 'D':
+ recurse_all = 0;
+ recurse_dir = 1;
+ break;
+ case 'R':
+ recurse_all = 1;
+ recurse_dir = 0;
+ break;
+ default:
+ return command_usage(&cowextsize_cmd);
+ }
+ }
+
+ if (optind < argc) {
+ cowextsize = (long)cvtnum(blocksize, sectsize, argv[optind]);
+ if (cowextsize < 0) {
+ printf(_("non-numeric cowextsize argument -- %s\n"),
+ argv[optind]);
+ return 0;
+ }
+ } else {
+ cowextsize = -1;
+ }
+
+ if (recurse_all || recurse_dir)
+ nftw(file->name, (cowextsize >= 0) ?
+ set_cowextsize_callback : get_cowextsize_callback,
+ 100, FTW_PHYS | FTW_MOUNT | FTW_DEPTH);
+ else if (cowextsize >= 0)
+ set_cowextsize(file->name, file->fd, cowextsize);
+ else
+ get_cowextsize(file->name, file->fd);
+ return 0;
+}
+
+void
+cowextsize_init(void)
+{
+ cowextsize_cmd.name = "cowextsize";
+ cowextsize_cmd.cfunc = cowextsize_f;
+ cowextsize_cmd.args = _("[-D | -R] [cowextsize]");
+ cowextsize_cmd.argmin = 0;
+ cowextsize_cmd.argmax = -1;
+ cowextsize_cmd.flags = CMD_NOMAP_OK;
+ cowextsize_cmd.oneline =
+ _("get/set preferred CoW extent size (in bytes) for the open file");
+ cowextsize_cmd.help = cowextsize_help;
+
+ add_command(&cowextsize_cmd);
+}
projects / thirdparty / xfsprogs-dev.git / commitdiff
