src/vol/vol-salvage.h

   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 /*
  11  *      Module:         vol-salvage.h
  12  */
  13
  14 #ifndef __vol_salvage_h_
  15 #define __vol_salvage_h_
  16
  17 #define SalvageVersion "2.4"
  18
  19 #include "salvage.h"
  20 #include "volinodes.h"
  21
  22 /* salvager data structures */
  23 struct InodeSummary {           /* Inode summary file--an entry for each
  24                                  * volume in the inode file for a partition */
  25     VolumeId volumeId;          /* Volume id */
  26     VolumeId RWvolumeId;                /* RW volume associated */
  27     int index;                  /* index into inode file (0, 1, 2 ...) */
  28     int nInodes;                /* Number of inodes for this volume */
  29     int nSpecialInodes;         /* Number of special inodes, i.e.  volume
  30                                  * header, index, etc.  These are all
  31                                  * marked (viceinode.h) and will all be sorted
  32                                  * to the beginning of the information for
  33                                  * this volume.  Read-only volumes should
  34                                  * ONLY have special inodes (all the other
  35                                  * inodes look as if they belong to the
  36                                  * original RW volume). */
  37     Unique maxUniquifier;       /* The maximum uniquifier found in all the inodes.
  38                                  * This is only useful for RW volumes and is used
  39                                  * to compute a new volume uniquifier in the event
  40                                  * that the header needs to be recreated. The inode
  41                                  * uniquifier may be a truncated version of vnode
  42                                  * uniquifier (AFS_3DISPARES). The real maxUniquifer
  43                                  * is from the vnodes and later calcuated from it */
  44     struct VolumeSummary *volSummary;
  45     /* Either a pointer to the original volume
  46      * header summary, or constructed summary
  47      * information */
  48 };
  49 #define readOnly(isp)   ((isp)->volumeId != (isp)->RWvolumeId)
  50
  51 struct VolumeSummary {          /* Volume summary an entry for each
  52                                  * volume in a volume directory.
  53                                  * Assumption: one volume directory per
  54                                  * partition */
  55     struct VolumeHeader header;
  56     /* volume number, rw volume number, inode
  57      * numbers of each major component of
  58      * the volume */
  59     IHandle_t *volumeInfoHandle;
  60     char deleted;               /* did we delete this volume? */
  61     byte wouldNeedCallback;     /* set if the file server should issue
  62                                  * call backs for all the files in this volume when
  63                                  * the volume goes back on line */
  64     byte unused;                /* is this volume 'extra'? i.e. not referenced
  65                                  * by anything? */
  66 };
  67
  68 struct VnodeInfo {
  69     IHandle_t *handle;          /* Inode containing this index */
  70     afs_sfsize_t nVnodes;       /* Total number of vnodes in index */
  71     afs_sfsize_t nAllocatedVnodes;      /* Total number actually used */
  72     int volumeBlockCount;       /* Total number of blocks used by volume */
  73     Inode *inodes;              /* Directory only */
  74     struct VnodeEssence {
  75         short count;            /* Number of references to vnode; MUST BE SIGNED */
  76         unsigned claimed:1;     /* Set when a parent directory containing an entry
  77                                  * referencing this vnode is found.  The claim
  78                                  * is that the parent in "parent" can point to
  79                                  * this vnode, and no other */
  80         unsigned changed:1;     /* Set if any parameters (other than the count)
  81                                  * in the vnode change.   It is determined if the
  82                                  * link count has changed by noting whether it is
  83                                  * 0 after scanning all directories */
  84         unsigned salvaged:1;    /* Set if this directory vnode has already been salvaged. */
  85         unsigned todelete:1;    /* Set if this vnode is to be deleted (should not be claimed) */
  86         afs_fsize_t blockCount;
  87         /* Number of blocks (1K) used by this vnode,
  88          * approximately */
  89         VnodeId parent;         /* parent in vnode */
  90         Unique unique;          /* Must match entry! */
  91         char *name;             /* Name of directory entry */
  92         int modeBits;           /* File mode bits */
  93         Inode InodeNumber;      /* file's inode */
  94         int type;               /* File type */
  95         int author;             /* File author */
  96         int owner;              /* File owner */
  97         int group;              /* File group */
  98     } *vnodes;
  99 };
 100
 101 struct DirSummary {
 102     struct DirHandle dirHandle;
 103     VnodeId vnodeNumber;
 104     Unique unique;
 105     unsigned haveDot, haveDotDot;
 106     VolumeId rwVid;
 107     int copied;                 /* If the copy-on-write stuff has been applied */
 108     VnodeId parent;
 109     char *name;
 110     char *vname;
 111     IHandle_t *ds_linkH;
 112 };
 113
 114 struct SalvInfo;
 115
 116 #define ORPH_IGNORE 0
 117 #define ORPH_REMOVE 1
 118 #define ORPH_ATTACH 2
 119
 120
 121 /* command line options */
 122 extern int debug;                       /* -d flag */
 123 extern int Testing;                     /* -n flag */
 124 extern int ListInodeOption;             /* -i flag */
 125 extern int ShowRootFiles;               /* -r flag */
 126 extern int RebuildDirs;                 /* -sal flag */
 127 extern int Parallel;                    /* -para X flag */
 128 extern int PartsPerDisk;                /* Salvage up to 8 partitions on same disk sequentially */
 129 extern int forceR;                      /* -b flag */
 130 extern int ShowLog;                     /* -showlog flag */
 131 extern int ShowSuid;                    /* -showsuid flag */
 132 extern int ShowMounts;                  /* -showmounts flag */
 133 extern int orphans;                     /* -orphans option */
 134 extern int Showmode;
 135
 136 #define MAXPARALLEL     32
 137
 138 extern int OKToZap;                     /* -o flag */
 139 extern int ForceSalvage;                /* If salvage should occur despite the DONT_SALVAGE flag
 140                                          * in the volume header */
 141
 142
 143 #define ROOTINODE       2       /* Root inode of a 4.2 Unix file system
 144                                  * partition */
 145
 146
 147
 148 extern char * tmpdir;
 149
 150
 151 #ifdef AFS_NT40_ENV
 152 /* For NT, we can fork the per partition salvagers to gain the required
 153  * safety against Aborts. But there's too many complex data structures at
 154  * the per volume salvager layer to easilty copy the data across.
 155  * childJobNumber is resset from -1 to the job number if this is a
 156  * per partition child of the main salvager. This information is passed
 157  * out-of-band in the extra data area setup for the now unused parent/child
 158  * data transfer.
 159  */
 160 #define SALVAGER_MAGIC 0x00BBaaDD
 161 #define NOT_CHILD -1            /* job numbers start at 0 */
 162 /* If new options need to be passed to child, add them here. */
 163 typedef struct {
 164     int cj_magic;
 165     int cj_number;
 166     char cj_part[32];
 167 } childJob_t;
 168
 169 /* Child job this process is running. */
 170 extern childJob_t myjob;
 171
 172 extern int nt_SalvagePartition(char *partName, int jobn);
 173 extern int nt_SetupPartitionSalvage(void *datap, int len);
 174
 175 typedef struct {
 176     struct InodeSummary *svgp_inodeSummaryp;
 177     int svgp_count;
 178     struct SalvInfo *svgp_salvinfo;
 179 } SVGParms_t;
 180 #endif /* AFS_NT40_ENV */
 181
 182 extern int canfork;
 183
 184
 185 /* prototypes */
 186 extern void Exit(int code) AFS_NORETURN;
 187 extern int Fork(void);
 188 extern int Wait(char *prog);
 189 extern char *ToString(const char *s);
 190 extern int AskDAFS(void);
 191 extern void AskOffline(struct SalvInfo *salvinfo, VolumeId volumeId);
 192 extern void AskOnline(struct SalvInfo *salvinfo, VolumeId volumeId);
 193 extern void AskDelete(struct SalvInfo *salvinfo, VolumeId volumeId);
 194 extern void CheckLogFile(char * log_path);
 195 extern void ClearROInUseBit(struct VolumeSummary *summary);
 196 extern void CopyAndSalvage(struct SalvInfo *salvinfo, struct DirSummary *dir);
 197 extern int CopyInode(Device device, Inode inode1, Inode inode2, int rwvolume);
 198 extern void CopyOnWrite(struct SalvInfo *salvinfo, struct DirSummary *dir);
 199 extern void CountVolumeInodes(register struct ViceInodeInfo *ip, int maxInodes,
 200                        register struct InodeSummary *summary);
 201 extern void DeleteExtraVolumeHeaderFile(struct SalvInfo *salvinfo,
 202                                         struct VolumeSummary *vsp);
 203 extern void DistilVnodeEssence(struct SalvInfo *salvinfo, VolumeId vid,
 204                                VnodeClass class, Inode ino, Unique * maxu);
 205 extern int GetInodeSummary(struct SalvInfo *salvinfo, FD_t inodeFile,
 206                            VolumeId singleVolumeNumber);
 207 extern int GetVolumeSummary(struct SalvInfo *salvinfo,
 208                             VolumeId singleVolumeNumber);
 209 extern int JudgeEntry(void *dirVal, char *name, afs_int32 vnodeNumber,
 210                       afs_int32 unique);
 211 extern void MaybeZapVolume(struct SalvInfo *salvinfo, struct InodeSummary *isp,
 212                            char *message, int deleteMe, int check);
 213 extern void ObtainSalvageLock(void);
 214 extern void ObtainSharedSalvageLock(void);
 215 extern void PrintInodeList(struct SalvInfo *salvinfo);
 216 extern void PrintInodeSummary(struct SalvInfo *salvinfo);
 217 extern int QuickCheck(struct SalvInfo *salvinfo, struct InodeSummary *isp,
 218                       int nVols);
 219 extern void RemoveTheForce(char *path);
 220 extern void SalvageDir(struct SalvInfo *salvinfo, char *name, VolumeId rwVid,
 221                        struct VnodeInfo *dirVnodeInfo, IHandle_t * alinkH,
 222                        int i, struct DirSummary *rootdir, int *rootdirfound);
 223 extern void SalvageFileSysParallel(struct DiskPartition64 *partP);
 224 extern void SalvageFileSys(struct DiskPartition64 *partP, VolumeId singleVolumeNumber);
 225 extern void SalvageFileSys1(struct DiskPartition64 *partP,
 226                             VolumeId singleVolumeNumber);
 227 extern int SalvageHeader(struct SalvInfo *salvinfo, struct afs_inode_info *sp,
 228                         struct InodeSummary *isp, int check, int *deleteMe);
 229 extern int SalvageIndex(struct SalvInfo *salvinfo, Inode ino, VnodeClass class,
 230                         int RW, struct ViceInodeInfo *ip, int nInodes,
 231                         struct VolumeSummary *volSummary, int check);
 232 extern int SalvageVnodes(struct SalvInfo *salvinfo, struct InodeSummary *rwIsp,
 233                         struct InodeSummary *thisIsp,
 234                         struct ViceInodeInfo *inodes, int check);
 235 extern int SalvageVolume(struct SalvInfo *salvinfo, struct InodeSummary *rwIsp,
 236                          IHandle_t * alinkH);
 237 extern void DoSalvageVolumeGroup(struct SalvInfo *salvinfo,
 238                                  struct InodeSummary *isp, int nVols);
 239 #ifdef AFS_NT40_ENV
 240 extern void nt_SalvageVolumeGroup(struct SalvInfo *salvinfo, struct InodeSummary *isp, int nVols);
 241 #endif
 242 extern int SalvageVolumeHeaderFile(struct SalvInfo *salvinfo,
 243                                    struct InodeSummary *isp,
 244                                    struct ViceInodeInfo *inodes, int RW,
 245                                    int check, int *deleteMe);
 246 extern int UseTheForceLuke(char *path);
 247
 248
 249
 250 #endif /* __vol_salvage_h_ */