X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fobdclass%2Fidmap.c;h=f2d77ba65fcac7a8b674219ac54815a2168cd2b1;hb=f4ce6b568b523060e71b17cf679c2b99d0038dbc;hp=eb31028f0c941ea58b751d2a9ab7b5490f21b64a;hpb=16e0fe6eab3e54aa7beddb75bf7dae05645408e9;p=fs%2Flustre-release.git diff --git a/lustre/obdclass/idmap.c b/lustre/obdclass/idmap.c index eb31028..f2d77ba 100644 --- a/lustre/obdclass/idmap.c +++ b/lustre/obdclass/idmap.c @@ -15,11 +15,7 @@ * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see - * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf - * - * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, - * CA 95054 USA or visit www.sun.com if you need additional information or - * have any questions. + * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ @@ -27,7 +23,7 @@ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2012, Intel Corporation. + * Copyright (c) 2012, 2017, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -42,93 +38,96 @@ #define DEBUG_SUBSYSTEM S_SEC +#include +#include + #include +#include #include #include -#define lustre_get_group_info(group_info) do { \ - cfs_atomic_inc(&(group_info)->usage); \ -} while (0) - -#define lustre_put_group_info(group_info) do { \ - if (cfs_atomic_dec_and_test(&(group_info)->usage)) \ - cfs_groups_free(group_info); \ -} while (0) - /* * groups_search() is copied from linux kernel! * A simple bsearch. */ -static int lustre_groups_search(cfs_group_info_t *group_info, - gid_t grp) -{ - int left, right; - - if (!group_info) - return 0; - - left = 0; - right = group_info->ngroups; - while (left < right) { - int mid = (left + right) / 2; - int cmp = grp - CFS_GROUP_AT(group_info, mid); - - if (cmp > 0) - left = mid + 1; - else if (cmp < 0) - right = mid; - else - return 1; - } - return 0; +static int lustre_groups_search(struct group_info *group_info, + gid_t grp) +{ + int left, right; + + if (!group_info) + return 0; + + left = 0; + right = group_info->ngroups; + while (left < right) { + int mid = (left + right) / 2; + int cmp = grp - + from_kgid(&init_user_ns, CFS_GROUP_AT(group_info, mid)); + + if (cmp > 0) + left = mid + 1; + else if (cmp < 0) + right = mid; + else + return 1; + } + return 0; } -void lustre_groups_from_list(cfs_group_info_t *ginfo, gid_t *glist) +void lustre_groups_from_list(struct group_info *ginfo, gid_t *glist) { - int i; - int count = ginfo->ngroups; +#ifdef HAVE_GROUP_INFO_GID + memcpy(ginfo->gid, glist, ginfo->ngroups * sizeof(__u32)); +#else + int i; + int count = ginfo->ngroups; - /* fill group_info from gid array */ - for (i = 0; i < ginfo->nblocks && count > 0; i++) { - int cp_count = min(CFS_NGROUPS_PER_BLOCK, count); - int off = i * CFS_NGROUPS_PER_BLOCK; - int len = cp_count * sizeof(*glist); + /* fill group_info from gid array */ + for (i = 0; i < ginfo->nblocks && count > 0; i++) { + int cp_count = min(CFS_NGROUPS_PER_BLOCK, count); + int off = i * CFS_NGROUPS_PER_BLOCK; + int len = cp_count * sizeof(*glist); - memcpy(ginfo->blocks[i], glist + off, len); - count -= cp_count; - } + memcpy(ginfo->blocks[i], glist + off, len); + count -= cp_count; + } +#endif } EXPORT_SYMBOL(lustre_groups_from_list); /* groups_sort() is copied from linux kernel! */ /* a simple shell-metzner sort */ -void lustre_groups_sort(cfs_group_info_t *group_info) -{ - int base, max, stride; - int gidsetsize = group_info->ngroups; - - for (stride = 1; stride < gidsetsize; stride = 3 * stride + 1) - ; /* nothing */ - stride /= 3; - - while (stride) { - max = gidsetsize - stride; - for (base = 0; base < max; base++) { - int left = base; - int right = left + stride; - gid_t tmp = CFS_GROUP_AT(group_info, right); - - while (left >= 0 && - CFS_GROUP_AT(group_info, left) > tmp) { - CFS_GROUP_AT(group_info, right) = - CFS_GROUP_AT(group_info, left); - right = left; - left -= stride; - } - CFS_GROUP_AT(group_info, right) = tmp; - } - stride /= 3; - } +void lustre_groups_sort(struct group_info *group_info) +{ + int base, max, stride; + int gidsetsize = group_info->ngroups; + + for (stride = 1; stride < gidsetsize; stride = 3 * stride + 1) + ; /* nothing */ + stride /= 3; + + while (stride) { + max = gidsetsize - stride; + for (base = 0; base < max; base++) { + int left = base; + int right = left + stride; + gid_t tmp = from_kgid(&init_user_ns, + CFS_GROUP_AT(group_info, right)); + + while (left >= 0 && + tmp < from_kgid(&init_user_ns, + CFS_GROUP_AT(group_info, left))) { + CFS_GROUP_AT(group_info, right) = + CFS_GROUP_AT(group_info, left); + right = left; + left -= stride; + } + CFS_GROUP_AT(group_info, right) = + make_kgid(&init_user_ns, tmp); + } + stride /= 3; + } } EXPORT_SYMBOL(lustre_groups_sort); @@ -137,7 +136,7 @@ int lustre_in_group_p(struct lu_ucred *mu, gid_t grp) int rc = 1; if (grp != mu->uc_fsgid) { - cfs_group_info_t *group_info = NULL; + struct group_info *group_info = NULL; if (mu->uc_ginfo || !mu->uc_identity || mu->uc_valid == UCRED_OLD) @@ -153,322 +152,11 @@ int lustre_in_group_p(struct lu_ucred *mu, gid_t grp) if (!group_info) return 0; - lustre_get_group_info(group_info); + atomic_inc(&group_info->usage); rc = lustre_groups_search(group_info, grp); - lustre_put_group_info(group_info); + if (atomic_dec_and_test(&group_info->usage)) + groups_free(group_info); } return rc; } EXPORT_SYMBOL(lustre_in_group_p); - -struct lustre_idmap_entry { - cfs_list_t lie_rmt_uid_hash; /* hashed as lie_rmt_uid; */ - cfs_list_t lie_lcl_uid_hash; /* hashed as lie_lcl_uid; */ - cfs_list_t lie_rmt_gid_hash; /* hashed as lie_rmt_gid; */ - cfs_list_t lie_lcl_gid_hash; /* hashed as lie_lcl_gid; */ - uid_t lie_rmt_uid; /* remote uid */ - uid_t lie_lcl_uid; /* local uid */ - gid_t lie_rmt_gid; /* remote gid */ - gid_t lie_lcl_gid; /* local gid */ -}; - -static inline __u32 lustre_idmap_hashfunc(__u32 id) -{ - return id & (CFS_IDMAP_HASHSIZE - 1); -} - -static -struct lustre_idmap_entry *idmap_entry_alloc(uid_t rmt_uid, uid_t lcl_uid, - gid_t rmt_gid, gid_t lcl_gid) -{ - struct lustre_idmap_entry *e; - - OBD_ALLOC_PTR(e); - if (e == NULL) - return NULL; - - CFS_INIT_LIST_HEAD(&e->lie_rmt_uid_hash); - CFS_INIT_LIST_HEAD(&e->lie_lcl_uid_hash); - CFS_INIT_LIST_HEAD(&e->lie_rmt_gid_hash); - CFS_INIT_LIST_HEAD(&e->lie_lcl_gid_hash); - e->lie_rmt_uid = rmt_uid; - e->lie_lcl_uid = lcl_uid; - e->lie_rmt_gid = rmt_gid; - e->lie_lcl_gid = lcl_gid; - - return e; -} - -static void idmap_entry_free(struct lustre_idmap_entry *e) -{ - if (!cfs_list_empty(&e->lie_rmt_uid_hash)) - cfs_list_del(&e->lie_rmt_uid_hash); - if (!cfs_list_empty(&e->lie_lcl_uid_hash)) - cfs_list_del(&e->lie_lcl_uid_hash); - if (!cfs_list_empty(&e->lie_rmt_gid_hash)) - cfs_list_del(&e->lie_rmt_gid_hash); - if (!cfs_list_empty(&e->lie_lcl_gid_hash)) - cfs_list_del(&e->lie_lcl_gid_hash); - OBD_FREE_PTR(e); -} - -/* - * return value - * NULL: not found entry - * ERR_PTR(-EACCES): found 1(remote):N(local) mapped entry - * others: found normal entry - */ -static -struct lustre_idmap_entry *idmap_search_entry(struct lustre_idmap_table *t, - uid_t rmt_uid, uid_t lcl_uid, - gid_t rmt_gid, gid_t lcl_gid) -{ - cfs_list_t *head; - struct lustre_idmap_entry *e; - - head = &t->lit_idmaps[RMT_UIDMAP_IDX][lustre_idmap_hashfunc(rmt_uid)]; - cfs_list_for_each_entry(e, head, lie_rmt_uid_hash) - if (e->lie_rmt_uid == rmt_uid) { - if (e->lie_lcl_uid == lcl_uid) { - if (e->lie_rmt_gid == rmt_gid && - e->lie_lcl_gid == lcl_gid) - /* must be quaternion match */ - return e; - } else { - /* 1:N uid mapping */ - CERROR("rmt uid %u already be mapped to %u" - " (new %u)\n", e->lie_rmt_uid, - e->lie_lcl_uid, lcl_uid); - return ERR_PTR(-EACCES); - } - } - - head = &t->lit_idmaps[RMT_GIDMAP_IDX][lustre_idmap_hashfunc(rmt_gid)]; - cfs_list_for_each_entry(e, head, lie_rmt_gid_hash) - if (e->lie_rmt_gid == rmt_gid) { - if (e->lie_lcl_gid == lcl_gid) { - if (unlikely(e->lie_rmt_uid == rmt_uid && - e->lie_lcl_uid == lcl_uid)) - /* after uid mapping search above, - * we should never come here */ - LBUG(); - } else { - /* 1:N gid mapping */ - CERROR("rmt gid %u already be mapped to %u" - " (new %u)\n", e->lie_rmt_gid, - e->lie_lcl_gid, lcl_gid); - return ERR_PTR(-EACCES); - } - } - - return NULL; -} - -static __u32 idmap_lookup_uid(cfs_list_t *hash, int reverse, - __u32 uid) -{ - cfs_list_t *head = &hash[lustre_idmap_hashfunc(uid)]; - struct lustre_idmap_entry *e; - - if (!reverse) { - cfs_list_for_each_entry(e, head, lie_rmt_uid_hash) - if (e->lie_rmt_uid == uid) - return e->lie_lcl_uid; - } else { - cfs_list_for_each_entry(e, head, lie_lcl_uid_hash) - if (e->lie_lcl_uid == uid) - return e->lie_rmt_uid; - } - - return CFS_IDMAP_NOTFOUND; -} - -static __u32 idmap_lookup_gid(cfs_list_t *hash, int reverse, __u32 gid) -{ - cfs_list_t *head = &hash[lustre_idmap_hashfunc(gid)]; - struct lustre_idmap_entry *e; - - if (!reverse) { - cfs_list_for_each_entry(e, head, lie_rmt_gid_hash) - if (e->lie_rmt_gid == gid) - return e->lie_lcl_gid; - } else { - cfs_list_for_each_entry(e, head, lie_lcl_gid_hash) - if (e->lie_lcl_gid == gid) - return e->lie_rmt_gid; - } - - return CFS_IDMAP_NOTFOUND; -} - -int lustre_idmap_add(struct lustre_idmap_table *t, - uid_t ruid, uid_t luid, - gid_t rgid, gid_t lgid) -{ - struct lustre_idmap_entry *e0, *e1; - - LASSERT(t); - - spin_lock(&t->lit_lock); - e0 = idmap_search_entry(t, ruid, luid, rgid, lgid); - spin_unlock(&t->lit_lock); - if (!e0) { - e0 = idmap_entry_alloc(ruid, luid, rgid, lgid); - if (!e0) - return -ENOMEM; - - spin_lock(&t->lit_lock); - e1 = idmap_search_entry(t, ruid, luid, rgid, lgid); - if (e1 == NULL) { - cfs_list_add_tail(&e0->lie_rmt_uid_hash, - &t->lit_idmaps[RMT_UIDMAP_IDX] - [lustre_idmap_hashfunc(ruid)]); - cfs_list_add_tail(&e0->lie_lcl_uid_hash, - &t->lit_idmaps[LCL_UIDMAP_IDX] - [lustre_idmap_hashfunc(luid)]); - cfs_list_add_tail(&e0->lie_rmt_gid_hash, - &t->lit_idmaps[RMT_GIDMAP_IDX] - [lustre_idmap_hashfunc(rgid)]); - cfs_list_add_tail(&e0->lie_lcl_gid_hash, - &t->lit_idmaps[LCL_GIDMAP_IDX] - [lustre_idmap_hashfunc(lgid)]); - } - spin_unlock(&t->lit_lock); - if (e1 != NULL) { - idmap_entry_free(e0); - if (IS_ERR(e1)) - return PTR_ERR(e1); - } - } else if (IS_ERR(e0)) { - return PTR_ERR(e0); - } - - return 0; -} -EXPORT_SYMBOL(lustre_idmap_add); - -int lustre_idmap_del(struct lustre_idmap_table *t, - uid_t ruid, uid_t luid, - gid_t rgid, gid_t lgid) -{ - struct lustre_idmap_entry *e; - int rc = 0; - - LASSERT(t); - - spin_lock(&t->lit_lock); - e = idmap_search_entry(t, ruid, luid, rgid, lgid); - if (IS_ERR(e)) - rc = PTR_ERR(e); - else if (e) - idmap_entry_free(e); - spin_unlock(&t->lit_lock); - - return rc; -} -EXPORT_SYMBOL(lustre_idmap_del); - -int lustre_idmap_lookup_uid(struct lu_ucred *mu, - struct lustre_idmap_table *t, - int reverse, uid_t uid) -{ - cfs_list_t *hash; - - if (mu && (mu->uc_valid == UCRED_OLD || mu->uc_valid == UCRED_NEW)) { - if (!reverse) { - if (uid == mu->uc_o_uid) - return mu->uc_uid; - else if (uid == mu->uc_o_fsuid) - return mu->uc_fsuid; - } else { - if (uid == mu->uc_uid) - return mu->uc_o_uid; - else if (uid == mu->uc_fsuid) - return mu->uc_o_fsuid; - } - } - - if (t == NULL) - return CFS_IDMAP_NOTFOUND; - - hash = t->lit_idmaps[reverse ? LCL_UIDMAP_IDX : RMT_UIDMAP_IDX]; - - spin_lock(&t->lit_lock); - uid = idmap_lookup_uid(hash, reverse, uid); - spin_unlock(&t->lit_lock); - - return uid; -} -EXPORT_SYMBOL(lustre_idmap_lookup_uid); - -int lustre_idmap_lookup_gid(struct lu_ucred *mu, struct lustre_idmap_table *t, - int reverse, gid_t gid) -{ - cfs_list_t *hash; - - if (mu && (mu->uc_valid == UCRED_OLD || mu->uc_valid == UCRED_NEW)) { - if (!reverse) { - if (gid == mu->uc_o_gid) - return mu->uc_gid; - else if (gid == mu->uc_o_fsgid) - return mu->uc_fsgid; - } else { - if (gid == mu->uc_gid) - return mu->uc_o_gid; - else if (gid == mu->uc_fsgid) - return mu->uc_o_fsgid; - } - } - - if (t == NULL) - return CFS_IDMAP_NOTFOUND; - - hash = t->lit_idmaps[reverse ? LCL_GIDMAP_IDX : RMT_GIDMAP_IDX]; - - spin_lock(&t->lit_lock); - gid = idmap_lookup_gid(hash, reverse, gid); - spin_unlock(&t->lit_lock); - - return gid; -} -EXPORT_SYMBOL(lustre_idmap_lookup_gid); - -struct lustre_idmap_table *lustre_idmap_init(void) -{ - struct lustre_idmap_table *t; - int i, j; - - OBD_ALLOC_PTR(t); - if(unlikely(t == NULL)) - return (ERR_PTR(-ENOMEM)); - - spin_lock_init(&t->lit_lock); - for (i = 0; i < ARRAY_SIZE(t->lit_idmaps); i++) - for (j = 0; j < ARRAY_SIZE(t->lit_idmaps[i]); j++) - CFS_INIT_LIST_HEAD(&t->lit_idmaps[i][j]); - - return t; -} -EXPORT_SYMBOL(lustre_idmap_init); - -void lustre_idmap_fini(struct lustre_idmap_table *t) -{ - cfs_list_t *list; - struct lustre_idmap_entry *e; - int i; - LASSERT(t); - - list = t->lit_idmaps[RMT_UIDMAP_IDX]; - spin_lock(&t->lit_lock); - for (i = 0; i < CFS_IDMAP_HASHSIZE; i++) - while (!cfs_list_empty(&list[i])) { - e = cfs_list_entry(list[i].next, - struct lustre_idmap_entry, - lie_rmt_uid_hash); - idmap_entry_free(e); - } - spin_unlock(&t->lit_lock); - - OBD_FREE_PTR(t); -} -EXPORT_SYMBOL(lustre_idmap_fini);