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https://github.com/versity/scoutfs.git
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9fc99a8c31
Add support for the inode index items which are replacing the seq walks from the old btree structures. We create the index items for the root inode, can print out the items, and add a commmand to walk the indices. Signed-off-by: Zach Brown <zab@versity.com>
92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <limits.h>
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#include "sparse.h"
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#include "util.h"
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#include "format.h"
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#include "ioctl.h"
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#include "cmd.h"
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static int ino_path_cmd(int argc, char **argv)
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{
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struct scoutfs_ioctl_ino_path args;
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char *endptr = NULL;
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char *path = NULL;
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char *curs = NULL;
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u64 ino;
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int ret;
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int fd;
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if (argc != 2) {
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fprintf(stderr, "must specify ino and path\n");
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return -EINVAL;
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}
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ino = strtoull(argv[0], &endptr, 0);
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if (*endptr != '\0' ||
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((ino == LLONG_MIN || ino == LLONG_MAX) && errno == ERANGE)) {
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fprintf(stderr, "error parsing inode number '%s'\n",
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argv[0]);
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return -EINVAL;
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}
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fd = open(argv[1], O_RDONLY);
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if (fd < 0) {
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ret = -errno;
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fprintf(stderr, "failed to open '%s': %s (%d)\n",
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argv[1], strerror(errno), errno);
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return ret;
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}
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path = malloc(PATH_MAX);
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if (!path) {
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fprintf(stderr, "couldn't allocate %d byte buffer\n", PATH_MAX);
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ret = -ENOMEM;
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goto out;
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}
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curs = calloc(1, SCOUTFS_IOC_INO_PATH_CURSOR_BYTES);
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if (!curs) {
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fprintf(stderr, "couldn't allocate %ld byte cursor\n",
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SCOUTFS_IOC_INO_PATH_CURSOR_BYTES);
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ret = -ENOMEM;
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goto out;
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}
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args.ino = ino;
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args.cursor_ptr = (intptr_t)curs;
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args.path_ptr = (intptr_t)path;
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args.cursor_bytes = SCOUTFS_IOC_INO_PATH_CURSOR_BYTES;
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args.path_bytes = PATH_MAX;
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do {
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ret = ioctl(fd, SCOUTFS_IOC_INO_PATH, &args);
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if (ret > 0)
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printf("%s\n", path);
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} while (ret > 0);
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if (ret < 0) {
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ret = -errno;
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fprintf(stderr, "inodes_since ioctl failed: %s (%d)\n",
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strerror(errno), errno);
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}
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out:
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free(path);
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free(curs);
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close(fd);
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return ret;
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};
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static void __attribute__((constructor)) ino_path_ctor(void)
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{
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cmd_register("ino-path", "<ino> <path>",
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"print paths that refer to inode #", ino_path_cmd);
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}
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