New API calls iso_node_get_projid(), iso_node_set_projid(), iso_local_get_projid(), iso_local_set_projid()

Makefile.am

@@ -26,8 +26,9 @@ libisofs_libisofs_la_LDFLAGS = \
 # ts A90409: Enabling use of zlib.
 # ts B00927: Enabling use of libjte (Jigdo Template Extraction)
 # ts C40713: Enabling system adapter for Linux chattr(1) flags
+# ts C41009: Enabling system adapter for project id of XFS-style quota
 libisofs_libisofs_la_CFLAGS = $(LIBACL_DEF) $(XATTR_DEF) $(LFA_DEF) \
-                              $(ZLIB_DEF) $(LIBJTE_DEF)
+                              $(PROJID_DEF) $(ZLIB_DEF) $(LIBJTE_DEF)
 
 # ts A90114 : added aaip_0_2.*
 

configure.ac

@@ -302,6 +302,23 @@ else
 fi
 AC_SUBST(LFA_DEF)
 
+dnl ts C41009
+PROJID_DEF=
+AC_ARG_ENABLE(projid,
+[  --enable-projid      Enable processing of XFS-style project id, default=yes],
+               , enable_projid=yes)
+if test x"$enable_projid" = xyes; then
+    AC_CHECK_HEADER(linux/fs.h, PROJID_DEF="-DLibisofs_with_aaip_projiD",
+                    PROJID_DEF=)
+fi
+if test x"$PROJID_DEF" = x; then
+    echo "disabled XFS-style project id"
+else
+    echo "enabled  XFS-style project id"
+fi
+AC_SUBST(PROJID_DEF)
+
+
 dnl ts A90409
 AC_ARG_ENABLE(zlib,
 [  --enable-zlib           Enable use of zlib by libisofs, default=yes],

doc/susp_aaip_isofs_names.txt

@@ -176,6 +176,7 @@ Format of Value:
 Example:
       (FS_SECRM_FL|FS_APPEND_FL|FS_NOCOMP_FL) = 0x421
       {   4 ,  33 }
+
 Registered:
       12 Jul 2024 by Thomas Schmitt for libisofs.
 
@@ -250,6 +251,27 @@ Registered:
 
 -------------------------------------------------------------------------------
 
+Name:
+      isofs.pi
+
+Purpose:
+      Records the project id for XFS-style quota management.
+      See man xfs_quota(8).
+      Missing isofs.pi is defaulted to project id 0.
+
+Format of Value:
+      A byte string which begins with the most significant byte.
+      Up to four bytes are permissible.
+
+Example:
+      Project id 258
+      { 1, 2 }
+
+Registered:
+      09 Oct 2024 by Thomas Schmitt for libisofs.
+
+-------------------------------------------------------------------------------
+
 Name:
       isofs.st
 

libisofs/aaip-os-dummy.c

@@ -47,7 +47,9 @@
         Bitfield corresponding to flag.
              bit0= ACL adapter is enabled
              bit1= xattr adapter is enabled
-             bit2 - bit7= Reserved for future types.
+             bit2= Linux-like file attribute flags (chattr) adapter is enabled
+             bit3= inquire availability of XFS-style project id
+             bit4 - bit7= Reserved for future types.
              bit8 and higher: reserved, do not interpret these
 */
 int aaip_local_attr_support(int flag)
@@ -95,6 +97,16 @@ int aaip_get_lfa_flags(char *path, uint64_t *lfa_flags, int *max_bit,
 }
 
 
+/* Obtain the project id for XFS-style quota management.
+*/
+int aaip_get_projid(char *path, uint32_t *projid, int *os_errno, int flag)
+{
+ *projid= 0;
+ *os_errno= 0;
+ return(0);
+}
+
+
 /* ------------------------------ Setters --------------------------------- */
 
 
@@ -155,3 +167,12 @@ int aaip_set_lfa_flags(char *path, uint64_t lfa_flags, int max_bit,
 }
 
 
+/* Set the project id for XFS-style quota management.
+*/
+int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag)
+{
+ *os_errno= 0;
+ return(0);
+}
+
+

libisofs/aaip-os-freebsd.c

@@ -57,7 +57,9 @@
         Bitfield corresponding to flag.
              bit0= ACL adapter is enabled
              bit1= xattr adapter is enabled
-             bit2 - bit7= Reserved for future types.
+             bit2= Linux-like file attribute flags (chattr) adapter is enabled
+             bit3= inquire availability of XFS-style project id
+             bit4 - bit7= Reserved for future types.
              bit8 and higher: reserved, do not interpret these
 */
 int aaip_local_attr_support(int flag)
@@ -391,6 +393,8 @@ static int get_single_attr(char *path, char *name, size_t *value_length,
                         bit6=  do not obtain Linux style file attribute flags
                                (chattr).
                                This obtaining is not implemented here anyways.
+                        bit8=  do not obtain XFS-style project id.
+                               This obtaining is not implemented here anyways.
                         bit15= free memory of names, value_lengths, values
    @return              1   ok
                         2   ok, no permission to inspect non-user namespaces
@@ -725,6 +729,16 @@ int aaip_get_lfa_flags(char *path, uint64_t *lfa_flags, int *max_bit,
 }
 
 
+/* Obtain the project id for XFS-style quota management.
+*/
+int aaip_get_projid(char *path, uint32_t *projid, int *os_errno, int flag)
+{
+ *projid= 0;
+ *os_errno= 0;
+ return(0);
+}
+
+
 /* ------------------------------ Setters --------------------------------- */
 
 
@@ -1123,3 +1137,12 @@ int aaip_set_lfa_flags(char *path, uint64_t lfa_flags, int max_bit,
 }
 
 
+/* Set the project id for XFS-style quota management.
+*/
+int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag)
+{
+ *os_errno= 0;
+ return(0);
+}
+
+

libisofs/aaip-os-linux.c

@@ -56,7 +56,8 @@
              bit0= inquire availability of ACL
              bit1= inquire availability of xattr
              bit2= inquire availability of Linux-like file attribute flags
-             bit3 - bit7= Reserved for future types.
+             bit3= inquire availability of XFS-style project id
+             bit4 - bit7= Reserved for future types.
                           It is permissibile to set them to 1 already now.
              bit8 and higher: reserved, submit 0
    @return
@@ -64,7 +65,8 @@
              bit0= ACL adapter is enabled
              bit1= xattr adapter is enabled
              bit2= Linux-like file attribute flags adapter is enabled
-             bit3 - bit7= Reserved for future types.
+             bit3= XFS-style project id is enabled
+             bit4 - bit7= Reserved for future types.
              bit8 and higher: reserved, do not interpret these
 */
 int aaip_local_attr_support(int flag)
@@ -88,6 +90,15 @@ int aaip_local_attr_support(int flag)
    ret|= 4;
 #endif
 #endif
+#endif
+
+#ifdef Libisofs_with_aaip_projiD
+#ifdef FS_IOC_FSGETXATTR
+#ifdef FS_IOC_FSSETXATTR
+ if(flag & 8)
+   ret|= 8;
+#endif
+#endif
 #endif
 
  return(ret);
@@ -283,6 +294,7 @@ static int get_single_attr(char *path, char *name, size_t *value_length,
                                (chattr)
                         bit7=  Without bit6: Ignore non-settable flags and do
                                not record "isofs.fa" if all flags are zero
+                        bit8=  do not obtain XFS-style project id
                         bit15= free memory of names, value_lengths, values
    @return              1  ok
                         (reserved for FreeBSD: 2 ok, no permission to inspect
@@ -316,6 +328,9 @@ int aaip_get_attr_list(char *path, size_t *num_attrs, char ***names,
  int max_bit, os_errno, lfa_length;
  unsigned char lfa_value[8];
 #endif
+#ifdef Libisofs_with_aaip_projiD
+ uint32_t projid;
+#endif
 
  if(flag & (1 << 15)) { /* Free memory */
    {ret= 1; goto ex;}
@@ -386,6 +401,16 @@ ex:;
 
 #endif
 
+#ifdef Libisofs_with_aaip_projiD
+
+ if(!(flag & 256)) {
+   ret= iso_local_get_projid(path, &projid, &os_errno, 0);
+   if(ret > 0 && projid != 0)
+     num_names++;
+ }
+
+#endif /* Libisofs_with_aaip_projiD */
+
  if(num_names == 0)
    {ret= 1; goto ex;}
  (*names)= calloc(num_names, sizeof(char *));
@@ -463,7 +488,7 @@ try_lfa_flags:;
      ret= 4;
    }
    if(ret == 1 || ret == 2) {
-     ret= aaip_encode_lfa_flags(lfa_flags, lfa_value, &lfa_length, 0);
+     ret= aaip_encode_uint64(lfa_flags, lfa_value, &lfa_length, 0);
      if(ret > 0) {
        (*names)[*num_attrs]= strdup("isofs.fa");
        if((*names)[*num_attrs] == NULL)
@@ -480,6 +505,29 @@ try_lfa_flags:;
 
 #endif /* Libisofs_with_aaip_lfa_flagS */
 
+#ifdef Libisofs_with_aaip_projiD
+
+ if(!(flag & 256)) {
+   ret= iso_local_get_projid(path,  &projid, &os_errno, 0);
+   if(ret > 0 && projid != 0) {
+     /* Encode as big-endian number with no trailing 0-bytes */
+     ret= aaip_encode_uint64((uint64_t) projid, lfa_value, &lfa_length, 0);
+     if(ret > 0) {
+       (*names)[*num_attrs]= strdup("isofs.pi");
+       if((*names)[*num_attrs] == NULL)
+         {ret= -1; goto ex;}
+       (*values)[*num_attrs]= calloc(lfa_length, 1);
+       if((*values)[*num_attrs] == NULL)
+         {ret= -1; goto ex;}
+       memcpy((*values)[*num_attrs], (char *) lfa_value, lfa_length);
+       (*value_lengths)[*num_attrs]= lfa_length;
+       (*num_attrs)++;
+     }
+   }
+ }
+
+#endif /* Libisofs_with_aaip_projiD */
+
  ret= 1;
 ex:;
 #ifdef Libisofs_with_aaip_acL
@@ -530,6 +578,7 @@ ex:;
    @param lfa_flags     Will get filled with the FS_*_FL
    @param max_bit       Will tell the highest bit that is possibly set
                         (-1 = surely no bit is valid)
+   @param os_errno      Will get filled with errno in case of error.
    @param flag          Bitfield for control purposes.
                         bit0= consider ENOTTY from FS_IOC_GETFLAGS an error
                               (else return 4 on ENOTTY)
@@ -606,6 +655,64 @@ int aaip_get_lfa_flags(char *path, uint64_t *lfa_flags, int *max_bit,
 }
 
 
+/* Obtain the project id for XFS-style quota management.
+   See man xfs_quota(8).
+   @param path          Path to the file.
+   @param projid        Will get filled with the project id.
+   @param os_errno      Will get filled with errno in case of error.
+   @param flag          Bitfield for control purposes.
+                        bit2= do not issue own error messages with operating
+                              system errors
+   @return              1= ok, *projid is valid
+                        0= local project id retrieval not enabled at compile 
+                           time
+                        <0 error with system calls:
+                        -1= error with open(2)
+                        -2= error with ioctl(2)
+*/
+int aaip_get_projid(char *path, uint32_t *projid, int *os_errno, int flag)
+{
+ int ret= 0;
+
+#ifdef Libisofs_with_aaip_projiD
+#ifdef FS_IOC_FSGETXATTR
+
+ int fd;
+ struct fsxattr ioctl_result;
+
+#endif
+#endif
+
+ *projid= 0;
+
+#ifdef Libisofs_with_aaip_projiD
+#ifdef FS_IOC_FSGETXATTR
+
+ fd= open(path, O_RDONLY | O_NDELAY);
+ if(fd == -1) {
+   aaip_local_error("open", path, errno, 0);
+   *os_errno= errno;
+   return(-1);
+ }
+ ret= ioctl(fd, FS_IOC_FSGETXATTR, &ioctl_result);
+ close(fd);
+ if(ret == -1) {
+   if(!(flag & 4))
+     aaip_local_error("ioctl(FS_IOC_FSGETXATTR)", path, errno, 0);
+   *os_errno= errno;
+   return(-2);
+ }
+ *projid= ioctl_result.fsx_projid;
+ ret= 1;
+
+#endif /* FS_IOC_FSGETXATTR */
+#endif /* Libisofs_with_aaip_lfa_flagS */
+
+ return(ret);
+}
+
+
+
 /* ------------------------------ Setters --------------------------------- */
 
 
@@ -960,3 +1067,61 @@ int aaip_set_lfa_flags(char *path, uint64_t lfa_flags, int max_bit,
  return(ret);
 }
 
+
+/* Set the project id for XFS-style quota management.
+   @param path          Path to the file.
+   @param projid        Contains the project id for the file.
+   @param os_errno      Will get filled with errno in case of error.
+   @param flag          Bitfield for control purposes.
+                        bit2= do not issue own error messages with operating
+                              system errors
+   @return              1= ok, projid was written
+                        0= local flags setting not enabled at compile time
+                        -1= error with open(2)
+                        -2= error with ioctl(FS_IOC_FSGETXATTR)
+                        -3= error with ioctl(FS_IOC_FSSETXATTR)
+*/
+int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag)
+{
+ int ret= 0;
+
+#ifdef Libisofs_with_aaip_projiD
+#ifdef FS_IOC_FSGETXATTR
+#ifdef FS_IOC_FSSETXATTR
+
+ int fd;
+ struct fsxattr ioctl_arg;
+
+ fd= open(path, O_RDONLY | O_NDELAY);
+ if(fd == -1) {
+   if(!(flag & 4))
+     aaip_local_error("open", path, errno, 0);
+   *os_errno= errno;
+   return(-1);
+ }
+ ret= ioctl(fd, FS_IOC_FSGETXATTR, &ioctl_arg);
+ if(ret == -1) {
+   if(!(flag & 4))
+     aaip_local_error("ioctl(FS_IOC_FSGETXATTR)", path, errno, 0);
+   *os_errno= errno;
+   close(fd);
+   return(-2);
+ }
+ ioctl_arg.fsx_projid= projid;
+ ret= ioctl(fd, FS_IOC_FSSETXATTR, &ioctl_arg);
+ close(fd);
+ if(ret == -1) {
+   if(!(flag & 4))
+     aaip_local_error("ioctl(FS_IOC_FSSETXATTR)", path, errno, 0);
+   *os_errno= errno;
+   return(-3);
+ }
+ ret= 1;
+
+#endif /* FS_IOC_FSSETXATTR */
+#endif /* FS_IOC_FSGETXATTR */
+#endif /* Libisofs_with_aaip_lfa_flagS */
+
+ return(ret);
+}
+

libisofs/aaip_0_2.c

@@ -900,7 +900,7 @@ int aaip_add_acl_st_mode(char *acl_text, mode_t st_mode, int flag)
 }
 
 
-int aaip_encode_lfa_flags(uint64_t lfa_flags, unsigned char value[8],
+int aaip_encode_uint64(uint64_t lfa_flags, unsigned char value[8],
                        int *length, int flag)
 {
  int i, l;

libisofs/aaip_0_2.h

@@ -162,7 +162,7 @@ int aaip_add_acl_st_mode(char *acl_text, mode_t st_mode, int flag);
    @param length      Will return the number of filled-in value bytes
    @return            <0 failure
 */
-int aaip_encode_lfa_flags(uint64_t lfa_flags, unsigned char value[8],
+int aaip_encode_uint64(uint64_t lfa_flags, unsigned char value[8],
                        int *length, int flag);
 
 
@@ -174,7 +174,8 @@ int aaip_encode_lfa_flags(uint64_t lfa_flags, unsigned char value[8],
              bit0= inquire availability of ACL
              bit1= inquire availability of xattr
              bit2= inquire availability of Linux-like file attribute flags
-             bit3 - bit7= Reserved for future types.
+             bit3= inquire availability of XFS-style project id
+             bit4 - bit7= Reserved for future types.
                           It is permissibile to set them to 1 already now.
              bit8 and higher: reserved, submit 0
    @return
@@ -182,7 +183,8 @@ int aaip_encode_lfa_flags(uint64_t lfa_flags, unsigned char value[8],
              bit0= ACL adapter is enabled
              bit1= xattr adapter is enabled
              bit2= Linux-like file attribute flags adapter is enabled
-             bit3 - bit7= Reserved for future types.
+             bit3= XFS-style project id is enabled
+             bit4 - bit7= Reserved for future types.
                           It is permissibile to set them to 1 already now.
              bit8 and higher: reserved, do not interpret these
 */
@@ -227,6 +229,9 @@ int aaip_get_acl_text(char *path, char **text, int flag);
                         bit5=  in case of symbolic link: inquire link target
                         bit6=  do not obtain Linux style file attribute flags
                                (chattr)
+                        bit7=  Without bit6: Ignore non-settable flags and do
+                               not record "isofs.fa" if all flags are zero
+                        bit8=  do not obtain XFS-style project id
                         bit15= free memory of names, value_lengths, values
    @return              >0  ok
                         <=0 error
@@ -265,6 +270,24 @@ int aaip_get_lfa_flags(char *path, uint64_t *lfa_flags, int *max_bit,
                        int *os_errno, int flag);
 
 
+/* Obtain the project id for XFS-style quota management.
+   See man xfs_quota(8).
+   @param path          Path to the file.
+   @param projid        Will get filled with the project id.
+   @param os_errno      Will get filled with errno in case of error.
+   @param flag          Bitfield for control purposes.
+                        bit2= do not issue own error messages with operating
+                              system errors
+   @return              1= ok, *projid is valid
+                        0= local project id retrieval not enabled at compile
+                           time
+                        <0 error with system calls:
+                        -1= error with open(2)
+                        -2= error with ioctl(2)
+*/
+int aaip_get_projid(char *path, uint32_t *projid, int *os_errno, int flag);
+
+
 /* --------------------------------- Decoder ---------------------------- */
 
 /*
@@ -591,5 +614,20 @@ int aaip_set_lfa_flags(char *path, uint64_t lfa_flags, int max_bit,
                        int *os_errno, int flag);
 
 
+/* Set the project id for XFS-style quota management.
+   @param path          Path to the file.
+   @param projid        Contains the project id for the file.
+   @param os_errno      Will get filled with errno in case of error.
+   @param flag          Bitfield for control purposes.
+                        bit2= do not issue own error messages with operating
+                              system errors
+   @return              1= ok, projid was written
+                        0= local flags setting not enabled at compile time
+                        -1= error with open(2)
+                        -2= error with ioctl(FS_IOC_FSGETXATTR)
+                        -3= error with ioctl(FS_IOC_FSSETXATTR)
+*/
+int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag);
+
 #endif /* ! Aaip_h_is_includeD */
 

libisofs/builder.c

@@ -255,7 +255,8 @@ int default_create_node(IsoNodeBuilder *builder, IsoImage *image,
                 (image->builder_ignore_ea << 2) |
                 (image->builder_take_all_ea << 3) |
                 ((!image->builder_ignore_lfa_flags) << 4) |
-                (image->builder_ignore_ro_lfa_flags << 5) );
+                (image->builder_ignore_ro_lfa_flags << 5) |
+                ((!image->builder_ignore_projid) << 6));
     if(ret == 2)
       image->blind_on_local_get_attrs = 1;
     if (ret > 0 && aa_string != NULL) {

libisofs/fs_local.c

@@ -507,14 +507,14 @@ int lfs_get_aa_string(IsoFileSource *src, unsigned char **aa_string, int flag)
 
     *aa_string = NULL;
 
-    if ((flag & (2 | 4 | 16) ) == (2 | 4)) {
+    if ((flag & (2 | 4 | 16 | 64) ) == (2 | 4)) {
         /* Neither ACL nor xattr shall be read, lfa_flags are not wanted */
         ret = 1;
         goto ex;
     }
     /* Obtain EAs and ACLs ("access" and "default"). ACLs encoded according
        to AAIP ACL representation. Clean out st_mode ACL entries.
-       Obtain Linux style attribute flags.
+       Obtain Linux style attribute flags and XFS-style project id.
     */ 
     path = iso_file_source_get_path(src);
     if (path == NULL) {
@@ -524,7 +524,8 @@ int lfs_get_aa_string(IsoFileSource *src, unsigned char **aa_string, int flag)
     ret = aaip_get_attr_list(path, &num_attrs, &names,
                              &value_lengths, &values,
                              (!(flag & 2)) | 2 | (flag & 4) | (flag & 8) | 16 |
-                             ((!(flag & 16)) << 6) | ((!!(flag & 32)) << 7));
+                             ((!(flag & 16)) << 6) | ((!!(flag & 32)) << 7) |
+                             ((!(flag & 64)) << 8));
     if (ret <= 0) {
         if (ret == -2)
             ret = ISO_AAIP_NO_GET_LOCAL;
@@ -866,13 +867,14 @@ int iso_local_set_acl_text(char *disk_path, char *text, int flag)
 int iso_local_get_attrs(char *disk_path, size_t *num_attrs, char ***names,
                         size_t **value_lengths, char ***values, int flag)
 {
-    int ret, lfa;
+    int ret, lfa, prj;
 
     lfa = (flag & 64) ^ 64;
+    prj = (flag & (1 << 8)) ^ (1 << 8);
     ret = aaip_get_attr_list(disk_path,
                              num_attrs, names, value_lengths, values,
-                             (flag & (1 | 4 | 8 | 32 | (1 << 15))) |
+                             (flag & (1 | 4 | 8 | 32 | 256 | (1 << 15))) |
-                             2 | 16 | lfa);
+                             2 | 16 | lfa | prj);
     if (ret <= 0)
         return ISO_AAIP_NO_GET_LOCAL;
     return 1 + (ret == 2);
@@ -958,7 +960,6 @@ int iso_local_get_perms_wo_acl(char *disk_path, mode_t *st_mode, int flag)
  *      4= ok, file did not bear attribute flags. E.g. because not S_IFDIR or
  *             S_IFREG, or because unsuitable filesystem.
  *             lfa_flags is set to 0
- *      0= local flags retrieval not enabled at compile time
  *     <0= error with system calls
  */
 int iso_local_get_lfa_flags(char *disk_path, uint64_t *lfa_flags, int *max_bit,
@@ -976,7 +977,7 @@ int iso_local_get_lfa_flags(char *disk_path, uint64_t *lfa_flags, int *max_bit,
         ret = lstat(disk_path, &stbuf);
     if (ret == -1) {
         *os_errno = errno;
-        return -1;
+        return ISO_FILE_DOESNT_EXIST;
     }
     if ((stbuf.st_mode & S_IFMT) == S_IFLNK && !(flag & 32))
         return 3;
@@ -987,7 +988,7 @@ int iso_local_get_lfa_flags(char *disk_path, uint64_t *lfa_flags, int *max_bit,
     if(ret == -1)
         return ISO_LFA_NO_OPEN_LOCAL;
     if(ret < 0)
-        return ISO_LFA_NO_SET_LOCAL;
+        return ISO_LFA_NO_GET_LOCAL;
     return ret;
 }
 
@@ -997,7 +998,7 @@ int iso_local_get_lfa_flags(char *disk_path, uint64_t *lfa_flags, int *max_bit,
  *      bit0= do not try to change known superuser flags
  *      bit1= change only known chattr settable flags
  *      bit2= do not issue own error messages with operating system errors
- *      bit5= in case of symbolic link: inquire link target
+ *      bit5= in case of symbolic link: operate on link target
  * @return
  *      1 = ok, all lfa_flags bits were written
  *      2 = ok, but some FS_*_FL bits could not be mapped to local flags
@@ -1018,7 +1019,7 @@ int iso_local_set_lfa_flags(char *disk_path, uint64_t lfa_flags, int max_bit,
         ret = lstat(disk_path, &stbuf);
     if (ret == -1) {
         *os_errno = errno;
-        return -1;
+        return ISO_FILE_DOESNT_EXIST;
     }
     if ((stbuf.st_mode & S_IFMT) == S_IFLNK && !(flag & 32))
         return 3;
@@ -1050,3 +1051,77 @@ int iso_local_set_lfa_flags(char *disk_path, uint64_t lfa_flags, int max_bit,
 }
 
 
+/*
+ * @param flag
+ *      Bitfield for control purposes
+ *      bit2= do not issue own error messages with operating system errors
+ *      bit5= in case of symbolic link: inquire link target
+ * @return
+ *      1= ok, projid is valid
+ *      3 = ok, symbolic link encountered, flag bit5 not set, projid set to 0
+ *     <0= error with system calls
+ */
+int iso_local_get_projid(char *disk_path, uint32_t *projid, int *os_errno,
+                         int flag)
+{
+    int ret;
+    struct stat stbuf;
+
+    *projid = 0;
+    *os_errno = 0;
+    if (flag & 32)
+        ret = stat(disk_path, &stbuf);
+    else
+        ret = lstat(disk_path, &stbuf);
+    if (ret == -1) {
+        *os_errno = errno;
+        return ISO_FILE_DOESNT_EXIST;
+    }
+    ret = aaip_get_projid(disk_path, projid, os_errno, flag & 4);
+    if(ret == 0)
+        return ISO_PROJID_NOT_ENABLED;
+    if(ret == -1)
+        return ISO_PROJID_NO_OPEN_LOCAL;
+    if(ret < 0)
+        return ISO_PROJID_NO_SET_LOCAL;
+    return ret;
+}
+
+
+/*
+ * @param flag          Bitfield for control purposes
+ *      bit2= do not issue own error messages with operating system errors
+ *      bit5= in case of symbolic link: manipulate link target
+ * @return
+ *      1 = ok, projid was written
+ *      3 = ok, symbolic link encountered, flag bit5 not set, nothing done
+ *     <0 = error
+ */
+int iso_local_set_projid(char *disk_path, uint32_t projid, int *os_errno,
+                         int flag)
+{
+    int ret;
+    struct stat stbuf;
+
+    *os_errno = 0;
+    if (flag & 32)
+        ret = stat(disk_path, &stbuf);
+    else
+        ret = lstat(disk_path, &stbuf);
+    if (ret == -1) {
+        *os_errno = errno;
+        return ISO_FILE_DOESNT_EXIST;
+    }
+    if ((stbuf.st_mode & S_IFMT) == S_IFLNK && !(flag & 32))
+        return 3;
+    ret = aaip_set_projid(disk_path, projid, os_errno, flag & 4);
+    if(ret == 0)
+        return ISO_PROJID_NOT_ENABLED;
+    if (ret == -1)
+        return ISO_PROJID_NO_OPEN_LOCAL;
+    if(ret < 0)
+        return ISO_PROJID_NO_SET_LOCAL;
+    return ret;
+}
+
+

libisofs/image.c

@@ -202,6 +202,7 @@ int iso_image_new(const char *name, IsoImage **image)
     img->builder_ignore_ea = 1;
     img->builder_ignore_lfa_flags = 1;
     img->builder_ignore_ro_lfa_flags = 0;
+    img->builder_ignore_projid = 1;
     img->truncate_mode = 1;
     img->truncate_length = LIBISOFS_NODE_NAME_MAX;
     img->truncate_buffer[0] = 0;
@@ -634,6 +635,7 @@ void iso_image_set_ignore_aclea(IsoImage *image, int what)
     image->builder_ignore_lfa_flags = !(what & 4);
     image->builder_take_all_ea = !!(what & 8);
     image->builder_ignore_ro_lfa_flags = !!(what & 32);
+    image->builder_ignore_projid = !!(what & 64);
 }
 
 
@@ -643,7 +645,8 @@ int iso_image_get_ignore_aclea(IsoImage *image)
            (image->builder_ignore_ea << 1) |
            ((!image->builder_ignore_lfa_flags) << 2) |
            (image->builder_take_all_ea << 3) |
-           (image->builder_ignore_ro_lfa_flags << 5);
+           (image->builder_ignore_ro_lfa_flags << 5) |
+           ((!image->builder_ignore_projid) << 6);
 }
 
 

libisofs/image.h

@@ -145,6 +145,12 @@ struct Iso_Image
      */
     unsigned int builder_ignore_ea : 1;
 
+    /**
+     * If not builder_ignore_ea : import all xattr namespaces from local
+     *                            filesystem, not only "user.
+     */
+    unsigned int builder_take_all_ea : 1;
+
     /**
      * Whether to ignore Linux style file attribute flags (chattr).
      * Not in effect with loading a complete ISO image but only with image
@@ -160,11 +166,11 @@ struct Iso_Image
      */
     unsigned int builder_ignore_ro_lfa_flags : 1;
 
-    /**
+    /* Whether to ignore XFS-style project id.
-     * If not builder_ignore_ea : import all xattr namespaces from local
+     * Not in effect with loading a complete ISO image but only with image
-     *                            filesystem, not only "user.
+     * manipulation.
      */
-    unsigned int builder_take_all_ea : 1;
+     unsigned int builder_ignore_projid : 1;
 
     /**
      * Files to exclude. Wildcard support is included.

libisofs/libisofs.h

@@ -874,6 +874,8 @@ struct IsoFileSource_Iface
      *                         attribute flags and do not record "isofs.fa"
      *                         if the other flags are all zero
      *                         @since 1.5.8
+     *                   bit6= Try to get XFS-style project id as "isofs.pi"
+     *                         @since 1.5.8
      * @param aa_string  Returns a pointer to the AAIP string data. If no AAIP
      *                   string is available, *aa_string becomes NULL.
      *                   (See doc/susp_aaip_*_*.txt for the meaning of AAIP and
@@ -1328,6 +1330,10 @@ int iso_image_new(const char *name, IsoImage **image);
  *     bit5= with bit2: Ignore non-settable Linux-like file attribute flags
  *           and do not record "isofs.fa" if the other flags are all zero
  *           @since 1.5.8
+ *     bit6= read XFS-style project from the file object id and record
+ *           "isofs.pi" if it is not 0.
+ *           (I.e. a do-not-ignore, because ignoring was default before)
+ *           @since 1.5.8
  *     all other bits are reserved
  *
  * @since 0.6.14
@@ -7296,6 +7302,8 @@ int iso_file_source_readlink(IsoFileSource *src, char *buf, size_t bufsiz);
  *                         attribute flags and do not record "isofs.fa"
  *                         if the other flags are all zero
  *                         @since 1.5.8
+ *                   bit6= Try to get XFS-style project id as "isofs.pi"
+ *                         @since 1.5.8
  * @return           1 means success (*aa_string == NULL is possible)
  *                  <0 means failure and must b a valid libisofs error code
  *                     (e.g. ISO_FILE_ERROR if no better one can be found).
@@ -7860,13 +7868,51 @@ int iso_node_get_lfa_flags(IsoNode *node, uint64_t *lfa_flags, int *max_bit,
 int iso_node_set_lfa_flags(IsoNode *node, uint64_t lfa_flags, int flag);
 
 
-/* ----- This is an interface to ACL and xattr of the local filesystem ----- */
+/**
+ * Obtain the XFS-style project id of the given node.
+ * The result is 0 if no project id information is associated with the node.
+ * 
+ * @param node
+ *      The node that is to be inquired.
+ * @param projid
+ *      Will get filled with the project id
+ * @param flag
+ *      Bitfield for control purposes. Submit 0.
+ * @return
+ *      1 = ok, projid is valid
+ *    < 0 = error
+ *
+ * @since 1.5.8
+ */
+int iso_node_get_projid(IsoNode *node, uint32_t *projid, int flag);
+
 
 /**
- * libisofs has an internal system dependent adapter to ACL and xattr
+ * Set the Linux-like XFS-style project id of the given node.
- * operations. For the sake of completeness and simplicity it exposes this
+ *
- * functionality to its applications which might want to get and set ACLs
+ * @param node
- * from local files.
+ *      The node that is to be manipulated.
+ * @param projid
+ *      The project id to be set.
+ * @param flag
+ *      Bitfield for control purposes. Submit 0.
+ * @return
+ *      1 = ok
+ *    < 0 = error
+ *
+ * @since 1.5.8
+ */
+int iso_node_set_projid(IsoNode *node, uint32_t projid, int flag);
+
+
+/* ---- This is an interface to file attributes of the local filesystem ---- */
+
+/**
+ * libisofs has an internal system dependent adapter to perform operations on
+ * ACL, xattr, Linux-like file attribute flags, and XFS-style project ids.
+ * For the sake of completeness and simplicity it exposes this functionality
+ * to its applications which might want to get and set such attributes from
+ * local files.
  */
 
 /**
@@ -7879,7 +7925,11 @@ int iso_node_set_lfa_flags(IsoNode *node, uint64_t lfa_flags, int flag);
  *      Bitfield for control purposes
  *           bit0= inquire availability of ACL
  *           bit1= inquire availability of xattr
- *           bit2 - bit7= Reserved for future types.
+ *           bit2= inquire availability of Linux-like file attribute flags
+ *                 @since 1.5.8
+ *           bit3= inquire availability of XFS-style project id
+ *                 @since 1.5.8
+ *           bit4 - bit7= Reserved for future types.
  *                        It is permissibile to set them to 1 already now.
  *           bit8 and higher: reserved, submit 0
  * @return
@@ -7888,7 +7938,9 @@ int iso_node_set_lfa_flags(IsoNode *node, uint64_t lfa_flags, int flag);
  *           bit1= xattr adapter is enabled
  *           bit2= Linux-like file attribute flags (chattr) adapter is enabled
  *                 @since 1.5.8
- *           bit3 - bit7= Reserved for future types.
+ *           bit3= XFS-style project ids are enabled
+ *                 @since 1.5.8
+ *           bit4 - bit7= Reserved for future types.
  *                        It is permissibile to set them to 1 already now.
  *           bit8 and higher: reserved, do not interpret these
  *
@@ -7896,6 +7948,7 @@ int iso_node_set_lfa_flags(IsoNode *node, uint64_t lfa_flags, int flag);
  */
 int iso_local_attr_support(int flag);
 
+
 /**
  * Get an ACL of the given file in the local filesystem in long text form.
  *
@@ -7971,8 +8024,9 @@ int iso_local_get_perms_wo_acl(char *disk_path, mode_t *st_mode, int flag);
 
 
 /**
- * Get xattr, non-trivial ACLs, and possible Linux-like file attribute flags
+ * Get xattr, non-trivial ACLs, possible Linux-like file attribute flags
- * (chattr) of the given file in the local filesystem.
+ * (chattr), and XFS-style project id of the given file in the local
+ * filesystem.
  * The resulting data has finally to be disposed by a call to this function
  * with flag bit15 set.
  *
@@ -7998,6 +8052,9 @@ int iso_local_get_perms_wo_acl(char *disk_path, mode_t *st_mode, int flag);
  *             I.e. those with a name which does not begin by "user."
  *      bit5=  in case of symbolic link: inquire link target
  *      bit6=  obtain Linux-like file attribute flags (chattr) as "isofs.fa"
+ *             @since 1.5.8
+ *      bit8=  obtain XFS-style non-zero project id as "isofs.pi"
+ *             @since 1.5.8
  *      bit15= free memory
  * @return
  *        1 ok
@@ -8239,6 +8296,55 @@ void iso_util_get_lfa_masks(uint64_t *user_settable, uint64_t *su_settable,
 uint64_t iso_util_get_effective_lfa_mask(uint64_t change_mask, int flag);
 
 
+/**
+ * Obtain the XFS-style project id of the given file.
+ * 
+ * @param disk_path
+ *      Path to the file
+ * @param projid
+ *      Will get filled with the project id number.
+ * @param os_errno
+ *      Will get filled with errno if a system call fails.
+ *      Else it will be filled with 0.
+ * @param flag
+ *      Bitfield for control purposes
+ *      bit2= do not issue own error messages with operating system errors
+ *      bit5= in case of symbolic link: inquire link target
+ * @return
+ *      1 = ok, projid is valid
+ *      3 = ok, symbolic link encountered, flag bit5 not set, projid set to 0
+ *     <0 = error with system calls
+ *
+ * @since 1.5.8
+ */
+int iso_local_get_projid(char *disk_path, uint32_t *projid, int *os_errno,
+                         int flag);
+
+
+/**
+ * Bring the given XFS-style project id into effect with the given file.
+ *
+ * @param disk_path
+ *      Path to the file
+ * @param projid
+ *      Project id
+ * @param os_errno
+ *      Will get filled with errno if a system call fails.
+ *      Else it will be filled with 0.
+ * @param flag
+ *      Bitfield for control purposes
+ *      bit2= do not issue own error messages with system call errors
+ *      bit5= in case of symbolic link: operate on link target
+ * @return
+ *      1 = ok, projid was written
+ *      3 = ok, symbolic link encountered, flag bit5 not set, nothing done
+ *     <0 = error
+ *
+ * @since 1.5.8
+ */
+int iso_local_set_projid(char *disk_path, uint32_t projid, int *os_errno,
+                         int flag);
+ 
 
 /* Default in case that the compile environment has no macro PATH_MAX.
 */
@@ -9742,10 +9848,26 @@ int iso_conv_name_chars(IsoWriteOpts *opts, char *name, size_t name_len,
                                                          (SORRY,HIGH, -434) */
 #define ISO_LFA_NO_SET_LOCAL        0xE030FE4E
 
-/** Failure to open local file for setting Linux-like file attributes
+/** Failure to open local file for Linux-like file attributes
                                                          (SORRY,HIGH, -435) */
 #define ISO_LFA_NO_OPEN_LOCAL       0xE030FE4D
 
+/** Local XFS-style file project id processing not enabled at compile time 
+                                                         (SORRY,HIGH, -436) */
+#define ISO_PROJID_NOT_ENABLED      0xE030FE4C
+
+/** Error with getting XFS-style project id of local file
+                                                         (SORRY,HIGH, -437) */
+#define ISO_PROJID_NO_GET_LOCAL     0xE030FE4B
+
+/** Error with setting XFS-style project id of local file
+                                                         (SORRY,HIGH, -438) */
+#define ISO_PROJID_NO_SET_LOCAL     0xE030FE4A
+
+/** Failure to open local file for XFS-style project id
+                                                         (SORRY,HIGH, -439) */
+#define ISO_PROJID_NO_OPEN_LOCAL    0xE030FE49
+
 
 
 /* Internal developer note: 

libisofs/libisofs.ver

@@ -387,9 +387,13 @@ local: *;
 
 LIBISOFS6_1.5.8 {
 iso_local_get_lfa_flags;
+iso_local_get_projid;
 iso_local_set_lfa_flags;
+iso_local_set_projid;
 iso_node_get_lfa_flags;
+iso_node_get_projid;
 iso_node_set_lfa_flags;
+iso_node_set_projid;
 iso_util_decode_lfa_flags;
 iso_util_encode_lfa_flags;
 iso_util_get_effective_lfa_mask;

libisofs/messages.c

@@ -585,6 +585,14 @@ const char *iso_error_to_msg(int errcode)
         return "Error with setting Linux-like file attributes of local file";
     case ISO_LFA_NO_OPEN_LOCAL:
         return "Failure to open local file for Linux-like file attributes";
+    case ISO_PROJID_NOT_ENABLED:
+        return "Local XFS-style file project id processing not enabled at compile time";
+    case ISO_PROJID_NO_GET_LOCAL:
+        return "Error with getting XFS-style project id of local file";
+    case ISO_PROJID_NO_SET_LOCAL:
+        return "Error with setting XFS-style project id of local file";
+    case ISO_PROJID_NO_OPEN_LOCAL:
+        return "Failure to open local file for XFS-style project id";
     default:
         return "Unknown error";
     }

libisofs/node.c

@@ -2058,6 +2058,7 @@ ex:;
 /* @param flag
         bit0= delete ACL, too
         bit1= delete file attribute flags (isofs.fa), too
+        bit2= delete XFS-style project id (isofs.pi), too
 */
 int iso_node_remove_fattr(IsoNode *node, int flag)
 {
@@ -2074,7 +2075,8 @@ int iso_node_remove_fattr(IsoNode *node, int flag)
     w = 0;
     for (i = 0; i < num_attrs; i++) {
         if (strncmp(names[i], "isofs.", 6) != 0 ||
-            ((flag & 2) && strcmp(names[i], "isofs.fa") == 0)) {
+            ((flag & 2) && strcmp(names[i], "isofs.fa") == 0) ||
+            ((flag & 4) && strcmp(names[i], "isofs.pi") == 0)) {
             free(names[i]);
             names[i] = NULL;
             free(values[i]);
@@ -2462,7 +2464,7 @@ int iso_node_set_lfa_flags(IsoNode *node, uint64_t lfa_flags, int flag)
     char *valuept;
     int ret, l;
 
-    ret = aaip_encode_lfa_flags(lfa_flags, value, &l, 0);
+    ret = aaip_encode_uint64(lfa_flags, value, &l, 0);
     if (ret < 0)
         return ret; 
     value_lengths[0] = l;
@@ -2501,6 +2503,57 @@ int iso_node_get_lfa_flags(IsoNode *node, uint64_t *lfa_flags, int *max_bit,
 }
 
 
+int iso_node_set_projid(IsoNode *node, uint32_t projid, int flag)
+{
+    static char *names = "isofs.pi";
+    static size_t value_lengths[1];
+    unsigned char value[8];
+    char *valuept = NULL;
+    int ret, l;
+
+    value_lengths[0] = 0;
+    if(projid == 0) {
+      /* Delete isofs.pi */
+      ret = iso_node_set_attrs(node, (size_t) 1, &names,
+                               value_lengths, &valuept, 2 | 4 | 8);
+      return ret; 
+    }
+    ret = aaip_encode_uint64((uint64_t) projid, value, &l, 0);
+    if (ret < 0)
+        return ret; 
+    value_lengths[0] = l;
+    valuept= (char *) value;
+    ret = iso_node_set_attrs(node, (size_t) 1,
+                             &names, value_lengths, &valuept, 2 | 8);
+    return ret;
+}
+
+
+int iso_node_get_projid(IsoNode *node, uint32_t *projid, int flag)
+{
+    int ret, i;
+    size_t value_len;
+    char *value = NULL;
+
+    *projid = 0;
+
+    ret = iso_node_lookup_attr(node, "isofs.pi", &value_len, &value, 0);
+    if (ret < 0)
+        return ret;
+    if (ret == 0)
+        return 1;
+    if (value_len <= 0)
+        return 1;
+    if (value_len > 4) {
+        value += value_len - 4;
+        value_len = 4;
+    }
+    for (i = 0; i < (int) value_len; i++)
+        *projid = (*projid << 8) | ((unsigned char *) value)[i];
+    return 1;
+}
+
+
 /* Function to identify and manage ZF parameters.
  * data is supposed to be a pointer to struct zisofs_zf_info
  */

libisofs/rockridge.c

@@ -1600,10 +1600,10 @@ try_again:
             }
         } else if (retry == 2) {
             if ((t->opts->max_ce_drop_attr & 15) >= 2) {
-                ret = iso_node_remove_fattr(n->node, 1 | 2);
+                ret = iso_node_remove_fattr(n->node, 1 | 2 | 4);
                 if (ret > 0) {
                     iso_msg_submit(t->image->id, ISO_CE_REMOVING_ATTR, 0,
-                                   "Removed ACL and attribute flags");
+                                   "Removed ACL, attribute flags, project id");
                     goto try_again;
                 }
             }