src/vol/xfs_size_check.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /* Verify that the size of the XFS inode is large enough to hold the XFS
  11  * attribute for AFS inode parameters. Check all the mounted /vicep partitions.
  12  */
  13 #include <afsconfig.h>
  14 #include <afs/param.h>
  15
  16 #include <roken.h>
  17
  18 #ifdef AFS_SGI_XFS_IOPS_ENV
  19 #include <mntent.h>
  20 #include <afs/afsint.h>
  21 #include "ihandle.h"
  22 #include "partition.h"
  23 #include <afs/xfsattrs.h>
  24
  25 char *prog = "xfs_size_check";
  26
  27 /* Verify that the on disk XFS inodes on the partition are large enough to
  28  * hold the AFS attribute. Returns -1 if the attribute can't be set or is
  29  * too small to fit in the inode. Returns 0 if the attribute does fit in
  30  * the XFS inode.
  31  */
  32 #define VERIFY_ERROR   -1
  33 #define VERIFY_OK       0
  34 #define VERIFY_FIX      1
  35 static int
  36 VerifyXFSInodeSize(char *part)
  37 {
  38     afs_xfs_attr_t junk;
  39     int length = SIZEOF_XFS_ATTR_T;
  40     int fd;
  41     int code = VERIFY_ERROR;
  42     struct fsxattr fsx;
  43
  44     if (attr_set(part, AFS_XFS_ATTR, &junk, length, ATTR_ROOT) < 0) {
  45         if (errno == EPERM) {
  46             printf("Must be root to run %s\n", prog);
  47             exit(1);
  48         }
  49         return VERIFY_ERROR;
  50     }
  51
  52     if ((fd = open(part, O_RDONLY, 0)) < 0)
  53         goto done;
  54
  55     if (fcntl(fd, F_FSGETXATTRA, &fsx) < 0)
  56         goto done;
  57
  58     if (fsx.fsx_nextents == 0)
  59         code = VERIFY_OK;
  60     else
  61         code = VERIFY_FIX;
  62
  63   done:
  64     if (fd >= 0)
  65         close(fd);
  66     (void)attr_remove(part, AFS_XFS_ATTR, ATTR_ROOT);
  67
  68     return code;
  69 }
  70
  71 #define ALLOC_STEP 256
  72 #define NAME_SIZE 64
  73 typedef struct {
  74     char partName[NAME_SIZE];
  75     char devName[NAME_SIZE];
  76 } partInfo;
  77 partInfo *partList = NULL;
  78 int nParts = 0;
  79 int nAvail = 0;
  80
  81 int
  82 CheckPartitions()
  83 {
  84     int i;
  85     struct mntent *mntent;
  86     FILE *mfd;
  87     DIR *dirp;
  88     struct dirent *dp;
  89     struct stat status;
  90     int code;
  91
  92     if ((mfd = setmntent(MOUNTED, "r")) == NULL) {
  93         printf("Problems in getting mount entries(setmntent): %s\n",
  94                strerror(errno));
  95         exit(-1);
  96     }
  97     while (mntent = getmntent(mfd)) {
  98         char *part = mntent->mnt_dir;
  99
 100         if (!hasmntopt(mntent, MNTOPT_RW))
 101             continue;
 102
 103         if (strncmp(part, VICE_PARTITION_PREFIX, VICE_PREFIX_SIZE)) {
 104             continue;           /* Non /vicepx; ignore */
 105         }
 106         if (stat(part, &status) == -1) {
 107             printf("Couldn't find file system %s; ignored\n", part);
 108             continue;
 109         }
 110         if (!strcmp("xfs", status.st_fstype)) {
 111             code = VerifyXFSInodeSize(part);
 112             switch (code) {
 113             case VERIFY_OK:
 114                 break;
 115             case VERIFY_ERROR:
 116                 printf("%s: Can't check XFS inode size: %s\n",
 117                        strerror(errno));
 118                 break;
 119             case VERIFY_FIX:
 120                 if (nAvail <= nParts) {
 121                     nAvail += ALLOC_STEP;
 122                     if (nAvail == ALLOC_STEP)
 123                         partList = malloc(nAvail * sizeof(partInfo));
 124                     else
 125                         partList = realloc(partList,
 126                                            nAvail * sizeof(partInfo));
 127                     if (!partList) {
 128                         printf
 129                             ("Failed to %salloc %d bytes for partition list.\n",
 130                              (nAvail == ALLOC_STEP) ? "m" : "re",
 131                              nAvail * sizeof(partInfo));
 132                         exit(1);
 133                     }
 134                 }
 135                 (void)strcpy(partList[nParts].partName, part);
 136                 (void)strcpy(partList[nParts].devName, mntent->mnt_fsname);
 137                 nParts++;
 138                 break;
 139             default:
 140                 printf("Unknown return code %d from VerifyXFSInodeSize.\n",
 141                        code);
 142                 abort();
 143             }
 144         }
 145     }
 146     return nParts;
 147 }
 148
 149
 150 main(int ac, char **av)
 151 {
 152     int i;
 153     int code;
 154
 155     if (getuid()) {
 156         printf("Must be root to run %s.\n", prog);
 157         exit(1);
 158     }
 159
 160     code = CheckPartitions();
 161     if (code) {
 162         printf("Need to remake the following partitions:\n");
 163         for (i = 0; i < nParts; i++) {
 164             printf("%s: mkfs -t xfs -i size=512 -l size=4000b %s\n",
 165                    partList[i].partName, partList[i].devName);
 166         }
 167     }
 168     exit(code ? 1 : 0);
 169 }
 170
 171
 172 #else /* AFS_SGI_XFS_IOPS_ENV */
 173 main()
 174 {
 175     printf("%s only runs on XFS platforms.\n, prog");
 176     exit(1);
 177 }
 178 #endif /* AFS_SGI_XFS_IOPS_ENV */