opensolaris_acl.c

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    1 /*-
    2  * Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org>
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD$");
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/types.h>
   32 #include <sys/malloc.h>
   33 #include <sys/errno.h>
   34 #include <sys/zfs_acl.h>
   35 #include <sys/acl.h>
   36 
   37 struct zfs2bsd {
   38         uint32_t        zb_zfs;
   39         int             zb_bsd;
   40 };
   41 
   42 struct zfs2bsd perms[] = {{ACE_READ_DATA, ACL_READ_DATA},
   43                         {ACE_WRITE_DATA, ACL_WRITE_DATA},
   44                         {ACE_EXECUTE, ACL_EXECUTE},
   45                         {ACE_APPEND_DATA, ACL_APPEND_DATA},
   46                         {ACE_DELETE_CHILD, ACL_DELETE_CHILD},
   47                         {ACE_DELETE, ACL_DELETE},
   48                         {ACE_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES},
   49                         {ACE_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES},
   50                         {ACE_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS},
   51                         {ACE_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS},
   52                         {ACE_READ_ACL, ACL_READ_ACL},
   53                         {ACE_WRITE_ACL, ACL_WRITE_ACL},
   54                         {ACE_WRITE_OWNER, ACL_WRITE_OWNER},
   55                         {ACE_SYNCHRONIZE, ACL_SYNCHRONIZE},
   56                         {0, 0}};
   57 
   58 struct zfs2bsd flags[] = {{ACE_FILE_INHERIT_ACE,
   59                             ACL_ENTRY_FILE_INHERIT},
   60                         {ACE_DIRECTORY_INHERIT_ACE,
   61                             ACL_ENTRY_DIRECTORY_INHERIT},
   62                         {ACE_NO_PROPAGATE_INHERIT_ACE,
   63                             ACL_ENTRY_NO_PROPAGATE_INHERIT},
   64                         {ACE_INHERIT_ONLY_ACE,
   65                             ACL_ENTRY_INHERIT_ONLY},
   66                         {ACE_INHERITED_ACE,
   67                             ACL_ENTRY_INHERITED},
   68                         {ACE_SUCCESSFUL_ACCESS_ACE_FLAG,
   69                             ACL_ENTRY_SUCCESSFUL_ACCESS},
   70                         {ACE_FAILED_ACCESS_ACE_FLAG,
   71                             ACL_ENTRY_FAILED_ACCESS},
   72                         {0, 0}};
   73 
   74 static int
   75 _bsd_from_zfs(uint32_t zfs, const struct zfs2bsd *table)
   76 {
   77         const struct zfs2bsd *tmp;
   78         int bsd = 0;
   79 
   80         for (tmp = table; tmp->zb_zfs != 0; tmp++) {
   81                 if (zfs & tmp->zb_zfs)
   82                         bsd |= tmp->zb_bsd;
   83         }
   84 
   85         return (bsd);
   86 }
   87 
   88 static uint32_t
   89 _zfs_from_bsd(int bsd, const struct zfs2bsd *table)
   90 {
   91         const struct zfs2bsd *tmp;
   92         uint32_t zfs = 0;
   93 
   94         for (tmp = table; tmp->zb_bsd != 0; tmp++) {
   95                 if (bsd & tmp->zb_bsd)
   96                         zfs |= tmp->zb_zfs;
   97         }
   98 
   99         return (zfs);
  100 }
  101 
  102 int
  103 acl_from_aces(struct acl *aclp, const ace_t *aces, int nentries)
  104 {
  105         int i;
  106         struct acl_entry *entry;
  107         const ace_t *ace;
  108 
  109         if (nentries < 1) {
  110                 printf("acl_from_aces: empty ZFS ACL; returning EINVAL.\n");
  111                 return (EINVAL);
  112         }
  113 
  114         if (nentries > ACL_MAX_ENTRIES) {
  115                 /*
  116                  * I believe it may happen only when moving a pool
  117                  * from SunOS to FreeBSD.
  118                  */
  119                 printf("acl_from_aces: ZFS ACL too big to fit "
  120                     "into 'struct acl'; returning EINVAL.\n");
  121                 return (EINVAL);
  122         }
  123 
  124         bzero(aclp, sizeof(*aclp));
  125         aclp->acl_maxcnt = ACL_MAX_ENTRIES;
  126         aclp->acl_cnt = nentries;
  127 
  128         for (i = 0; i < nentries; i++) {
  129                 entry = &(aclp->acl_entry[i]);
  130                 ace = &(aces[i]);
  131 
  132                 if (ace->a_flags & ACE_OWNER)
  133                         entry->ae_tag = ACL_USER_OBJ;
  134                 else if (ace->a_flags & ACE_GROUP)
  135                         entry->ae_tag = ACL_GROUP_OBJ;
  136                 else if (ace->a_flags & ACE_EVERYONE)
  137                         entry->ae_tag = ACL_EVERYONE;
  138                 else if (ace->a_flags & ACE_IDENTIFIER_GROUP)
  139                         entry->ae_tag = ACL_GROUP;
  140                 else
  141                         entry->ae_tag = ACL_USER;
  142 
  143                 if (entry->ae_tag == ACL_USER || entry->ae_tag == ACL_GROUP)
  144                         entry->ae_id = ace->a_who;
  145                 else
  146                         entry->ae_id = ACL_UNDEFINED_ID;
  147 
  148                 entry->ae_perm = _bsd_from_zfs(ace->a_access_mask, perms);
  149                 entry->ae_flags = _bsd_from_zfs(ace->a_flags, flags);
  150 
  151                 switch (ace->a_type) {
  152                 case ACE_ACCESS_ALLOWED_ACE_TYPE:
  153                         entry->ae_entry_type = ACL_ENTRY_TYPE_ALLOW;
  154                         break;
  155                 case ACE_ACCESS_DENIED_ACE_TYPE:
  156                         entry->ae_entry_type = ACL_ENTRY_TYPE_DENY;
  157                         break;
  158                 case ACE_SYSTEM_AUDIT_ACE_TYPE:
  159                         entry->ae_entry_type = ACL_ENTRY_TYPE_AUDIT;
  160                         break;
  161                 case ACE_SYSTEM_ALARM_ACE_TYPE:
  162                         entry->ae_entry_type = ACL_ENTRY_TYPE_ALARM;
  163                         break;
  164                 default:
  165                         panic("acl_from_aces: a_type is 0x%x", ace->a_type);
  166                 }
  167         }
  168 
  169         return (0);
  170 }
  171 
  172 void
  173 aces_from_acl(ace_t *aces, int *nentries, const struct acl *aclp)
  174 {
  175         int i;
  176         const struct acl_entry *entry;
  177         ace_t *ace;
  178 
  179         bzero(aces, sizeof(*aces) * aclp->acl_cnt);
  180 
  181         *nentries = aclp->acl_cnt;
  182 
  183         for (i = 0; i < aclp->acl_cnt; i++) {
  184                 entry = &(aclp->acl_entry[i]);
  185                 ace = &(aces[i]);
  186 
  187                 ace->a_who = entry->ae_id;
  188 
  189                 if (entry->ae_tag == ACL_USER_OBJ)
  190                         ace->a_flags = ACE_OWNER;
  191                 else if (entry->ae_tag == ACL_GROUP_OBJ)
  192                         ace->a_flags = (ACE_GROUP | ACE_IDENTIFIER_GROUP);
  193                 else if (entry->ae_tag == ACL_GROUP)
  194                         ace->a_flags = ACE_IDENTIFIER_GROUP;
  195                 else if (entry->ae_tag == ACL_EVERYONE)
  196                         ace->a_flags = ACE_EVERYONE;
  197                 else /* ACL_USER */
  198                         ace->a_flags = 0;
  199 
  200                 ace->a_access_mask = _zfs_from_bsd(entry->ae_perm, perms);
  201                 ace->a_flags |= _zfs_from_bsd(entry->ae_flags, flags);
  202 
  203                 switch (entry->ae_entry_type) {
  204                 case ACL_ENTRY_TYPE_ALLOW:
  205                         ace->a_type = ACE_ACCESS_ALLOWED_ACE_TYPE;
  206                         break;
  207                 case ACL_ENTRY_TYPE_DENY:
  208                         ace->a_type = ACE_ACCESS_DENIED_ACE_TYPE;
  209                         break;
  210                 case ACL_ENTRY_TYPE_ALARM:
  211                         ace->a_type = ACE_SYSTEM_ALARM_ACE_TYPE;
  212                         break;
  213                 case ACL_ENTRY_TYPE_AUDIT:
  214                         ace->a_type = ACE_SYSTEM_AUDIT_ACE_TYPE;
  215                         break;
  216                 default:
  217                         panic("aces_from_acl: ae_entry_type is 0x%x", entry->ae_entry_type);
  218                 }
  219         }
  220 }

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FreeBSD/Linux Kernel Cross Reference sys/cddl/compat/opensolaris/kern/opensolaris_acl.c

FreeBSD/Linux Kernel Cross Reference
sys/cddl/compat/opensolaris/kern/opensolaris_acl.c