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#include <dirent.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/xattr.h>
#include <unistd.h>
#include "libbcachefs/bcachefs_ioctl.h"
#include "cmds.h"
#include "libbcachefs.h"
static void propagate_recurse(int dirfd)
{
DIR *dir = fdopendir(dirfd);
struct dirent *d;
if (!dir) {
fprintf(stderr, "fdopendir() error: %m\n");
return;
}
while ((errno = 0), (d = readdir(dir))) {
if (!strcmp(d->d_name, ".") ||
!strcmp(d->d_name, ".."))
continue;
int ret = ioctl(dirfd, BCHFS_IOC_REINHERIT_ATTRS,
d->d_name);
if (ret < 0) {
fprintf(stderr, "error propagating attributes to %s: %m\n",
d->d_name);
continue;
}
if (!ret) /* did no work */
continue;
struct stat st = xfstatat(dirfd, d->d_name,
AT_SYMLINK_NOFOLLOW);
if (!S_ISDIR(st.st_mode))
continue;
int fd = openat(dirfd, d->d_name, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "error opening %s: %m\n", d->d_name);
continue;
}
propagate_recurse(fd);
}
if (errno)
die("readdir error: %m");
closedir(dir);
}
static void remove_bcachefs_attr(const char *path, const char *full_attr_name)
{
if (removexattr(path, full_attr_name) != 0) {
// EINVAL in case bcachefs-tools is newer than kernel
if (errno != ENODATA && errno != EINVAL) {
fprintf(stderr, "error removing attribute %s from %s: %m\n",
full_attr_name, path);
}
}
}
static void remove_all_bcachefs_attrs(const char *path)
{
unsigned i;
for (i = 0; i < bch2_opts_nr; i++) {
if (bch2_opt_table[i].flags & OPT_INODE) {
// Only works on empty directory.
if (strcmp(bch2_opt_table[i].attr.name, "casefold") == 0)
continue;
char *full_name = mprintf("bcachefs.%s", bch2_opt_table[i].attr.name);
remove_bcachefs_attr(path, full_name);
free(full_name);
}
}
}
static void do_setattr(char *path, struct bch_opt_strs opts, bool remove_all)
{
unsigned i;
if (remove_all) {
remove_all_bcachefs_attrs(path);
}
for (i = 0; i < bch2_opts_nr; i++) {
if (!opts.by_id[i])
continue;
char *n = mprintf("bcachefs.%s", bch2_opt_table[i].attr.name);
if (strcmp(opts.by_id[i], "-") == 0) {
remove_bcachefs_attr(path, n);
} else {
if (setxattr(path, n, opts.by_id[i], strlen(opts.by_id[i]), 0))
die("setxattr error: %m");
}
free(n);
}
struct stat st = xstat(path);
if (!S_ISDIR(st.st_mode))
return;
int dirfd = open(path, O_RDONLY);
if (dirfd < 0)
die("error opening %s: %m", path);
propagate_recurse(dirfd);
}
static void setattr_usage(void)
{
puts("bcachefs set-file-option - set attributes on files in a bcachefs filesystem\n"
"Usage: bcachefs set-file-option [OPTIONS]... <files>\n"
"\n"
"Options:");
bch2_opts_usage(OPT_INODE);
puts(" --remove-all Remove all file options\n"
" To remove specific options, use: --option=-\n"
" -h Display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_setattr(int argc, char *argv[])
{
unsigned i;
bool remove_all = false;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "--remove-all") == 0) {
remove_all = true;
bch_remove_arg_from_argv(&argc, argv, i);
i--;
}
}
struct bch_opt_strs opts =
bch2_cmdline_opts_get(&argc, argv, OPT_INODE);
for (i = 1; i < argc; i++)
if (argv[i][0] == '-') {
printf("invalid option %s\n", argv[i]);
setattr_usage();
exit(EXIT_FAILURE);
}
if (argc <= 1)
die("Please supply one or more files");
for (i = 1; i < argc; i++)
do_setattr(argv[i], opts, remove_all);
bch2_opt_strs_free(&opts);
return 0;
}
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