fit.c

  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 
  3 #include "common.h"
  4 
  5 #define BUFLEN 64
  6 #define DEVPATHSTR_SIZE 15
  7 
  8 static const char *const fit0 = "/dev/fit0";
  9 static const char *const fitrw = "/dev/fitrw";
 10 
 11 struct devpath {
 12         char prefix[5];
 13         char device[11];
 14 };
 15 
 16 struct fit_volume {
 17         struct volume v;
 18         union {
 19                 char devpathstr[DEVPATHSTR_SIZE+1];
 20                 struct devpath devpath;
 21         } dev;
 22 };
 23 
 24 static struct driver fit_driver;
 25 
 26 static int fit_volume_identify(struct volume *v)
 27 {
 28         struct fit_volume *p = container_of(v, struct fit_volume, v);
 29         int ret = FS_NONE;
 30         FILE *f;
 31 
 32         f = fopen(p->dev.devpathstr, "r");
 33         if (!f)
 34                 return ret;
 35 
 36         ret = block_file_identify(f, 0);
 37 
 38         fclose(f);
 39 
 40         return ret;
 41 }
 42 
 43 static int fit_volume_init(struct volume *v)
 44 {
 45         struct fit_volume *p = container_of(v, struct fit_volume, v);
 46         char voldir[BUFLEN];
 47         unsigned int volsize;
 48 
 49         snprintf(voldir, sizeof(voldir), "%s/%s", block_dir_name, p->dev.devpath.device);
 50 
 51         if (read_uint_from_file(voldir, "size", &volsize))
 52                 return -1;
 53 
 54         v->type = BLOCKDEV;
 55         v->size = volsize << 9; /* size is returned in sectors of 512 bytes */
 56         v->blk = p->dev.devpathstr;
 57 
 58         return block_volume_format(v, 0, p->dev.devpathstr);
 59 }
 60 
 61 static struct volume *fit_volume_find(char *name)
 62 {
 63         struct fit_volume *p;
 64         struct stat buf;
 65         const char *fname;
 66         int ret;
 67 
 68         if (!strcmp(name, "rootfs"))
 69                 fname = fit0;
 70         else if (!strcmp(name, "rootfs_data"))
 71                 fname = fitrw;
 72         else
 73                 return NULL;
 74 
 75         ret = stat(fname, &buf);
 76         if (ret)
 77                 return NULL;
 78 
 79         p = calloc(1, sizeof(struct fit_volume));
 80         if (!p)
 81                 return NULL;
 82 
 83         strncpy(p->dev.devpathstr, fname, DEVPATHSTR_SIZE);
 84         p->v.drv = &fit_driver;
 85         p->v.blk = p->dev.devpathstr;
 86         p->v.name = name;
 87 
 88         return &p->v;
 89 }
 90 
 91 static struct driver fit_driver = {
 92         .name = "fit",
 93         .priority = 30,
 94         .find = fit_volume_find,
 95         .init = fit_volume_init,
 96         .identify = fit_volume_identify,
 97 };
 98 
 99 DRIVER(fit_driver);
100
This page was automatically generated by LXR 0.3.1. • OpenWrt
OpenWrt.org Cross Reference

Sources/fstools/libfstools/fit.c
