XRootD
XrdPssCks Class Reference

#include <XrdPssCks.hh>

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Public Member Functions

 XrdPssCks (XrdSysError *erP)
 
virtual ~XrdPssCks ()
 
virtual int Calc (const char *Pfn, XrdCksData &Cks, int doSet=1)
 
virtual int Config (const char *Token, char *Line)
 
virtual int Del (const char *Pfn, XrdCksData &Cks)
 
virtual int Get (const char *Pfn, XrdCksData &Cks)
 
virtual int Init (const char *ConfigFN, const char *DfltCalc=0)
 
virtual char * List (const char *Pfn, char *Buff, int Blen, char Sep=' ')
 
virtual const char * Name (int seqNum=0)
 
virtual int Set (const char *Pfn, XrdCksData &Cks, int myTime=0)
 
virtual int Size (const char *Name=0)
 
virtual int Ver (const char *Pfn, XrdCksData &Cks)
 
- Public Member Functions inherited from XrdCks
 XrdCks (XrdSysError *erP)
 Constructor. More...
 
virtual ~XrdCks ()
 Destructor. More...
 
virtual int Calc (const char *Xfn, XrdCksData &Cks, XrdCksPCB *pcbP, int doSet=1)
 
virtual XrdCksCalcObject (const char *name)
 
virtual int Ver (const char *Xfn, XrdCksData &Cks, XrdCksPCB *pcbP)
 

Additional Inherited Members

- Protected Attributes inherited from XrdCks
XrdSysErroreDest
 

Detailed Description

Definition at line 40 of file XrdPssCks.hh.

Constructor & Destructor Documentation

◆ XrdPssCks()

XrdPssCks::XrdPssCks ( XrdSysError erP)

Definition at line 79 of file XrdPssCks.cc.

79  : XrdCks(erP)
80 {
81 
82 // Prefill the native digests we support
83 //
84  csTab[0].Len = 4; strcpy(csTab[0].Name, "adler32");
85  csTab[1].Len = 4; strcpy(csTab[1].Name, "crc32");
86  csTab[2].Len = 16; strcpy(csTab[2].Name, "md5");
87  csLast = 2;
88 }
XrdCks(XrdSysError *erP)
Constructor.
Definition: XrdCks.hh:272
virtual const char * Name(int seqNum=0)
Definition: XrdPssCks.cc:185

References Name().

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◆ ~XrdPssCks()

virtual XrdPssCks::~XrdPssCks ( )
inlinevirtual

Definition at line 69 of file XrdPssCks.hh.

69 {}

Member Function Documentation

◆ Calc()

virtual int XrdPssCks::Calc ( const char *  Xfn,
XrdCksData Cks,
int  doSet = 1 
)
inlinevirtual

Calculate a new checksum for a physical file using the checksum algorithm named in the Cks parameter.

Parameters
XfnThe logical or physical name of the file to be checksumed.
CksFor input, it specifies the checksum algorithm to be used. For output, the checksum value is returned upon success.
doSetWhen true, the new value must replace any existing value in the Xfn's extended file attributes.
pcbPIn the second form, the pointer to the callback object. A nil pointer does not invoke any callback.
Returns
Success: zero with Cks structure holding the checksum value. Failure: -errno (see significant error numbers below).

Implements XrdCks.

Definition at line 44 of file XrdPssCks.hh.

45  {return Get(Pfn, Cks);}
virtual int Get(const char *Pfn, XrdCksData &Cks)
Definition: XrdPssCks.cc:106

References Get().

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◆ Config()

virtual int XrdPssCks::Config ( const char *  Token,
char *  Line 
)
inlinevirtual

Parse a configuration directives specific to the checksum manager.

Parameters
TokenPoints to the directive that triggered the call.
LineAll the characters after the directive.
Returns
Success: 1 Failure: 0

Implements XrdCks.

Definition at line 52 of file XrdPssCks.hh.

52 {return 1;}

◆ Del()

virtual int XrdPssCks::Del ( const char *  Xfn,
XrdCksData Cks 
)
inlinevirtual

Delete the checksum from the Xfn's xattrs.

Parameters
XfnThe logical or physical name of the file to be checksumed.
CksSpecifies the checksum type to delete.
Returns
Success: 0 Failure: -errno (see significant error numbers below).

Implements XrdCks.

Definition at line 47 of file XrdPssCks.hh.

48  {return -ENOTSUP;}

◆ Get()

int XrdPssCks::Get ( const char *  Xfn,
XrdCksData Cks 
)
virtual

Retreive the checksum from the Xfn's xattrs and return it and indicate whether or not it is stale (i.e. the file modification has changed or the name and length are not the expected values).

Parameters
XfnThe logical or physical name of the file to be checksumed.
CksFor input, it specifies the checksum type to return. For output, the checksum value is returned upon success.
Returns
Success: The length of the binary checksum in the Cks structure. Failure: -errno (see significant error numbers below).

Implements XrdCks.

Definition at line 106 of file XrdPssCks.cc.

107 {
108  EPNAME("GetCks");
109  static const int cksBLen = 256;
110  static const int urlBLen = 2048;
111  char cksBuff[cksBLen], pBuff[urlBLen], cgiBuff[32], *tP;
112  XrdOucTokenizer Resp(cksBuff);
113  time_t Mtime;
114  int rc, n;
115 
116 // Construct the cgi for digest type
117 //
118  n = snprintf(cgiBuff, sizeof(cgiBuff), "cks.type=%s", Cks.Name);
119  if (n >= (int)sizeof(cgiBuff)) return -ENAMETOOLONG;
120 
121 // Construct the correct url info
122 //
123  XrdPssUrlInfo uInfo(Cks.envP, Pfn, cgiBuff, false);
124  uInfo.setID();
125 
126 // Direct the path to the origin
127 //
128  if ((rc = XrdPssSys::P2URL(pBuff, sizeof(pBuff), uInfo))) return rc;
129 
130 // Do some debugging
131 //
132  DEBUG(uInfo.Tident(),"url="<<pBuff);
133 
134 // First step is to getthe checksum value
135 //
136  if ((rc = XrdPosixXrootd::QueryChksum(pBuff, Mtime, cksBuff, cksBLen)) <= 0)
137  return (rc ? -errno : -ENOTSUP);
138 
139 // Get the checksum name
140 //
141  if (!Resp.GetLine() || !(tP = Resp.GetToken()) || !(*tP)) return -ENOMSG;
142  if (!Cks.Set(tP)) return -ENOTSUP;
143 
144 // Now get the checksum value
145 //
146  if (!(tP = Resp.GetToken()) || !(*tP)) return -ENODATA;
147  if (!Cks.Set(tP, strlen(tP))) return -ENOTSUP;
148 
149 // Set remaining fields and return success
150 //
151  Cks.fmTime = static_cast<long long>(Mtime);
152  Cks.csTime = 0;
153  return Cks.Length;
154 }
#define DEBUG(x)
Definition: XrdBwmTrace.hh:54
#define EPNAME(x)
Definition: XrdBwmTrace.hh:56
#define ENODATA
Definition: XrdPssCks.cc:44
int Set(const char *csName)
Definition: XrdCksData.hh:81
char Length
Definition: XrdCksData.hh:52
char Name[NameSize]
Definition: XrdCksData.hh:44
static int QueryChksum(const char *path, time_t &mtime, char *buff, int blen)
static int P2URL(char *pbuff, int pblen, XrdPssUrlInfo &uInfo, bool doN2N=true)
Definition: XrdPss.cc:1376

References XrdCksData::csTime, DEBUG, ENODATA, EPNAME, XrdOucTokenizer::GetLine(), XrdOucTokenizer::GetToken(), XrdCksData::Length, XrdCksData::Name, XrdPssSys::P2URL(), XrdPosixXrootd::QueryChksum(), XrdCksData::Set(), XrdPssUrlInfo::setID(), and XrdPssUrlInfo::Tident().

Referenced by Calc(), and Ver().

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◆ Init()

int XrdPssCks::Init ( const char *  ConfigFN,
const char *  DfltCalc = 0 
)
virtual

Fully initialize the manager which includes loading any plugins.

Parameters
ConfigFNPoints to the configuration file path.
DfltCalcIs the default checksum and should be defaulted if NULL. The default implementation defaults this to adler32. A default is only needed should the checksum name in the XrdCksData object be omitted.
Returns
Success: 1 Failure: 0

Implements XrdCks.

Definition at line 160 of file XrdPssCks.cc.

161 {
162  int i;
163 
164 // See if we need to set the default calculation
165 //
166  if (DfltCalc)
167  {for (i = 0; i < csLast; i++) if (!strcmp(csTab[i].Name, DfltCalc)) break;
168  if (i >= csMax)
169  {eDest->Emsg("Config", DfltCalc, "cannot be made the default; "
170  "not supported.");
171  return 0;
172  }
173  if (i) {csInfo Temp = csTab[i]; csTab[i] = csTab[0]; csTab[0] = Temp;}
174  }
175 
176 // All done
177 //
178  return 1;
179 }
XrdSysError * eDest
Definition: XrdCks.hh:289
int Emsg(const char *esfx, int ecode, const char *text1, const char *text2=0)
Definition: XrdSysError.cc:95

References XrdCks::eDest, XrdSysError::Emsg(), and Name().

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◆ List()

virtual char* XrdPssCks::List ( const char *  Xfn,
char *  Buff,
int  Blen,
char  Sep = ' ' 
)
inlinevirtual

List names of the checksums associated with a Xfn or all supported ones.

Parameters
XfnThe logical or physical file name whose checksum names are to be returned. When Xfn is null, return all supported checksum algorithm names.
BuffPoints to a buffer, at least 64 bytes in length, to hold a "Sep" separated list of checksum names.
BlenThe length of the buffer.
SepThe separation character to be used between adjacent names.
Returns
Success: Pointer to Buff holding at least one checksum name. Failure: A nil pointer is returned.

Implements XrdCks.

Definition at line 56 of file XrdPssCks.hh.

57  {return 0;}

◆ Name()

const char * XrdPssCks::Name ( int  seqNum = 0)
virtual

Get the name of the checksums associated with a sequence number. Note that Name() may be called prior to final config to see if there are any chksums to configure and avoid unintended errors.

Parameters
seqNumThe sequence number. Zero signifies the default name. Higher numbers are alternates.
Returns
Success: Pointer to the name. Failure: A nil pointer is returned (no more alternates exist).

Implements XrdCks.

Definition at line 185 of file XrdPssCks.cc.

186 {
187 
188  return (seqNum < 0 || seqNum > csLast ? 0 : csTab[seqNum].Name);
189 }

Referenced by XrdPssCks(), Init(), and Size().

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◆ Set()

virtual int XrdPssCks::Set ( const char *  Xfn,
XrdCksData Cks,
int  myTime = 0 
)
inlinevirtual

Set a file's checksum in the extended attributes along with the file's mtime and the time of setting.

Parameters
XfnThe logical or physical name of the file to be set.
CksSpecifies the checksum name and value.
myTimeWhen true then the fmTime and gmTime in the Cks structure are to be used; as opposed to the current time.
Returns
Success: zero is returned. Failure: -errno (see significant error numbers below).

Implements XrdCks.

Definition at line 63 of file XrdPssCks.hh.

64  {return -ENOTSUP;}

◆ Size()

int XrdPssCks::Size ( const char *  Name = 0)
virtual

Get the binary length of the checksum with the corresponding name.

Parameters
NameThe checksum algorithm name. If null, use the default name.
Returns
Success: checksum length. Failure: Zero if the checksum name does not exist.

Implements XrdCks.

Definition at line 195 of file XrdPssCks.cc.

196 {
197  csInfo *iP = (Name != 0 ? Find(Name) : &csTab[0]);
198  return (iP != 0 ? iP->Len : 0);
199 }

References Name().

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◆ Ver()

int XrdPssCks::Ver ( const char *  Xfn,
XrdCksData Cks 
)
virtual

Retreive the checksum from the Xfn's xattrs and compare it to the supplied checksum. If the checksum is not available or is stale, a new checksum is calculated and written to the extended attributes.

Parameters
XfnThe logical or physical name of the file to be verified.
CksSpecifies the checksum name and value.
pcbPIn the second form, the pointer to the callback object. A nil pointer does not invoke any callback.
Returns
Success: True Failure: False (the checksums do not match) or -errno indicating that verification could not be performed (see significant error numbers below).

Implements XrdCks.

Definition at line 205 of file XrdPssCks.cc.

206 {
207  XrdCksData fCks;
208  csInfo *csIP = &csTab[0];
209  int rc;
210 
211 // Determine which checksum to get
212 //
213  if (!(*Cks.Name)) strcpy(Cks.Name, csTab[0].Name);
214  else if (!(csIP = Find(Cks.Name))) return -ENOTSUP;
215 
216 // Get the file checksum
217 //
218  if ((rc = Get(Pfn, fCks))) return rc;
219 
220 // Compare the checksums
221 //
222  return (!strcmp(fCks.Name, Cks.Name) && fCks.Length == Cks.Length
223  && !memcmp(fCks.Value, Cks.Value, csIP->Len));
224 }
char Value[ValuSize]
Definition: XrdCksData.hh:53

References Get(), XrdCksData::Length, XrdCksData::Name, and XrdCksData::Value.

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The documentation for this class was generated from the following files: