diff options
| -rw-r--r-- | bcachefs.c | 5 | ||||
| -rw-r--r-- | cmd_attr.c | 113 | ||||
| -rw-r--r-- | cmds.h | 2 |
3 files changed, 120 insertions, 0 deletions
@@ -69,6 +69,8 @@ static void usage(void) " migrate Migrate an existing filesystem to bcachefs, in place\n" " migrate-superblock Add default superblock, after bcachefs migrate\n" "\n" + "Commands for operating on files in a bcachefs filesystem:\n" + " setattr Set various per file attributes\n" "Debug:\n" "These commands work on offline, unmounted filesystems\n" " dump Dump filesystem metadata to a qcow2 image\n" @@ -198,6 +200,9 @@ int main(int argc, char *argv[]) if (!strcmp(cmd, "list")) return cmd_list(argc, argv); + if (!strcmp(cmd, "setattr")) + return cmd_setattr(argc, argv); + if (!strcmp(cmd, "--help")) { usage(); return 0; diff --git a/cmd_attr.c b/cmd_attr.c new file mode 100644 index 00000000..a3c82124 --- /dev/null +++ b/cmd_attr.c @@ -0,0 +1,113 @@ +#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; + + 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); + close(fd); + } + + if (errno) + die("readdir error: %m"); +} + +static void do_setattr(char *path, struct bch_opt_strs opts) +{ + unsigned i; + + 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 (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); + close(dirfd); +} + +static void setattr_usage(void) +{ + puts("bcachefs setattr - set attributes on files in a bcachefs filessytem\n" + "Usage: bcachefs setattr [OPTIONS]... <files>\n" + "\n" + "Options:"); + + bch2_opts_usage(OPT_INODE); + puts(" -h Display this help and exit\n" + "Report bugs to <linux-bcache@vger.kernel.org>"); +} + +int cmd_setattr(int argc, char *argv[]) +{ + struct bch_opt_strs opts = + bch2_cmdline_opts_get(&argc, argv, OPT_INODE); + unsigned i; + + 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); + + return 0; +} @@ -45,4 +45,6 @@ int cmd_migrate_superblock(int argc, char *argv[]); int cmd_version(int argc, char *argv[]); +int cmd_setattr(int argc, char *argv[]); + #endif /* _CMDS_H */ |