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path: root/fs/nfsd/nfs4acl.c
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Diffstat (limited to 'fs/nfsd/nfs4acl.c')
-rw-r--r--fs/nfsd/nfs4acl.c233
1 files changed, 167 insertions, 66 deletions
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index e4805261515..d714156a19f 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -36,8 +36,14 @@
#include <linux/slab.h>
#include <linux/nfs_fs.h>
-#include <linux/nfs4_acl.h>
+#include "nfsfh.h"
+#include "nfsd.h"
+#include "acl.h"
+#include "vfs.h"
+#define NFS4_ACL_TYPE_DEFAULT 0x01
+#define NFS4_ACL_DIR 0x02
+#define NFS4_ACL_OWNER 0x04
/* mode bit translations: */
#define NFS4_READ_MODE (NFS4_ACE_READ_DATA)
@@ -129,36 +135,47 @@ static short ace2type(struct nfs4_ace *);
static void _posix_to_nfsv4_one(struct posix_acl *, struct nfs4_acl *,
unsigned int);
-struct nfs4_acl *
-nfs4_acl_posix_to_nfsv4(struct posix_acl *pacl, struct posix_acl *dpacl,
- unsigned int flags)
+int
+nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry,
+ struct nfs4_acl **acl)
{
- struct nfs4_acl *acl;
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ struct posix_acl *pacl = NULL, *dpacl = NULL;
+ unsigned int flags = 0;
int size = 0;
- if (pacl) {
- if (posix_acl_valid(pacl) < 0)
- return ERR_PTR(-EINVAL);
- size += 2*pacl->a_count;
+ pacl = get_acl(inode, ACL_TYPE_ACCESS);
+ if (!pacl) {
+ pacl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
+ if (IS_ERR(pacl))
+ return PTR_ERR(pacl);
}
- if (dpacl) {
- if (posix_acl_valid(dpacl) < 0)
- return ERR_PTR(-EINVAL);
- size += 2*dpacl->a_count;
+ /* allocate for worst case: one (deny, allow) pair each: */
+ size += 2 * pacl->a_count;
+
+ if (S_ISDIR(inode->i_mode)) {
+ flags = NFS4_ACL_DIR;
+ dpacl = get_acl(inode, ACL_TYPE_DEFAULT);
+ if (dpacl)
+ size += 2 * dpacl->a_count;
}
- /* Allocate for worst case: one (deny, allow) pair each: */
- acl = nfs4_acl_new(size);
- if (acl == NULL)
- return ERR_PTR(-ENOMEM);
+ *acl = nfs4_acl_new(size);
+ if (*acl == NULL) {
+ error = -ENOMEM;
+ goto out;
+ }
- if (pacl)
- _posix_to_nfsv4_one(pacl, acl, flags & ~NFS4_ACL_TYPE_DEFAULT);
+ _posix_to_nfsv4_one(pacl, *acl, flags & ~NFS4_ACL_TYPE_DEFAULT);
if (dpacl)
- _posix_to_nfsv4_one(dpacl, acl, flags | NFS4_ACL_TYPE_DEFAULT);
+ _posix_to_nfsv4_one(dpacl, *acl, flags | NFS4_ACL_TYPE_DEFAULT);
- return acl;
+ out:
+ posix_acl_release(pacl);
+ posix_acl_release(dpacl);
+ return error;
}
struct posix_acl_summary {
@@ -263,7 +280,7 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl,
ace->flag = eflag;
ace->access_mask = deny_mask_from_posix(deny, flags);
ace->whotype = NFS4_ACL_WHO_NAMED;
- ace->who = pa->e_id;
+ ace->who_uid = pa->e_uid;
ace++;
acl->naces++;
}
@@ -272,7 +289,7 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl,
ace->access_mask = mask_from_posix(pa->e_perm & pas.mask,
flags);
ace->whotype = NFS4_ACL_WHO_NAMED;
- ace->who = pa->e_id;
+ ace->who_uid = pa->e_uid;
ace++;
acl->naces++;
pa++;
@@ -299,7 +316,7 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl,
ace->access_mask = mask_from_posix(pa->e_perm & pas.mask,
flags);
ace->whotype = NFS4_ACL_WHO_NAMED;
- ace->who = pa->e_id;
+ ace->who_gid = pa->e_gid;
ace++;
acl->naces++;
pa++;
@@ -328,7 +345,7 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl,
ace->flag = eflag | NFS4_ACE_IDENTIFIER_GROUP;
ace->access_mask = deny_mask_from_posix(deny, flags);
ace->whotype = NFS4_ACL_WHO_NAMED;
- ace->who = pa->e_id;
+ ace->who_gid = pa->e_gid;
ace++;
acl->naces++;
}
@@ -344,6 +361,18 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl,
acl->naces++;
}
+static bool
+pace_gt(struct posix_acl_entry *pace1, struct posix_acl_entry *pace2)
+{
+ if (pace1->e_tag != pace2->e_tag)
+ return pace1->e_tag > pace2->e_tag;
+ if (pace1->e_tag == ACL_USER)
+ return uid_gt(pace1->e_uid, pace2->e_uid);
+ if (pace1->e_tag == ACL_GROUP)
+ return gid_gt(pace1->e_gid, pace2->e_gid);
+ return false;
+}
+
static void
sort_pacl_range(struct posix_acl *pacl, int start, int end) {
int sorted = 0, i;
@@ -354,8 +383,8 @@ sort_pacl_range(struct posix_acl *pacl, int start, int end) {
while (!sorted) {
sorted = 1;
for (i = start; i < end; i++) {
- if (pacl->a_entries[i].e_id
- > pacl->a_entries[i+1].e_id) {
+ if (pace_gt(&pacl->a_entries[i],
+ &pacl->a_entries[i+1])) {
sorted = 0;
tmp = pacl->a_entries[i];
pacl->a_entries[i] = pacl->a_entries[i+1];
@@ -372,8 +401,10 @@ sort_pacl(struct posix_acl *pacl)
* by uid/gid. */
int i, j;
- if (pacl->a_count <= 4)
- return; /* no users or groups */
+ /* no users or groups */
+ if (!pacl || pacl->a_count <= 4)
+ return;
+
i = 1;
while (pacl->a_entries[i].e_tag == ACL_USER)
i++;
@@ -397,7 +428,10 @@ struct posix_ace_state {
};
struct posix_user_ace_state {
- uid_t uid;
+ union {
+ kuid_t uid;
+ kgid_t gid;
+ };
struct posix_ace_state perms;
};
@@ -497,19 +531,21 @@ posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
/*
* ACLs with no ACEs are treated differently in the inheritable
- * and effective cases: when there are no inheritable ACEs, we
- * set a zero-length default posix acl:
+ * and effective cases: when there are no inheritable ACEs,
+ * calls ->set_acl with a NULL ACL structure.
*/
- if (state->empty && (flags & NFS4_ACL_TYPE_DEFAULT)) {
- pacl = posix_acl_alloc(0, GFP_KERNEL);
- return pacl ? pacl : ERR_PTR(-ENOMEM);
- }
+ if (state->empty && (flags & NFS4_ACL_TYPE_DEFAULT))
+ return NULL;
+
/*
* When there are no effective ACEs, the following will end
* up setting a 3-element effective posix ACL with all
* permissions zero.
*/
- nace = 4 + state->users->n + state->groups->n;
+ if (!state->users->n && !state->groups->n)
+ nace = 3;
+ else /* Note we also include a MASK ACE in this case: */
+ nace = 4 + state->users->n + state->groups->n;
pacl = posix_acl_alloc(nace, GFP_KERNEL);
if (!pacl)
return ERR_PTR(-ENOMEM);
@@ -520,7 +556,6 @@ posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
if (error)
goto out_err;
low_mode_from_nfs4(state->owner.allow, &pace->e_perm, flags);
- pace->e_id = ACL_UNDEFINED_ID;
for (i=0; i < state->users->n; i++) {
pace++;
@@ -530,7 +565,7 @@ posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
goto out_err;
low_mode_from_nfs4(state->users->aces[i].perms.allow,
&pace->e_perm, flags);
- pace->e_id = state->users->aces[i].uid;
+ pace->e_uid = state->users->aces[i].uid;
add_to_mask(state, &state->users->aces[i].perms);
}
@@ -540,7 +575,6 @@ posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
if (error)
goto out_err;
low_mode_from_nfs4(state->group.allow, &pace->e_perm, flags);
- pace->e_id = ACL_UNDEFINED_ID;
add_to_mask(state, &state->group);
for (i=0; i < state->groups->n; i++) {
@@ -551,14 +585,15 @@ posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
goto out_err;
low_mode_from_nfs4(state->groups->aces[i].perms.allow,
&pace->e_perm, flags);
- pace->e_id = state->groups->aces[i].uid;
+ pace->e_gid = state->groups->aces[i].gid;
add_to_mask(state, &state->groups->aces[i].perms);
}
- pace++;
- pace->e_tag = ACL_MASK;
- low_mode_from_nfs4(state->mask.allow, &pace->e_perm, flags);
- pace->e_id = ACL_UNDEFINED_ID;
+ if (state->users->n || state->groups->n) {
+ pace++;
+ pace->e_tag = ACL_MASK;
+ low_mode_from_nfs4(state->mask.allow, &pace->e_perm, flags);
+ }
pace++;
pace->e_tag = ACL_OTHER;
@@ -566,7 +601,6 @@ posix_state_to_acl(struct posix_acl_state *state, unsigned int flags)
if (error)
goto out_err;
low_mode_from_nfs4(state->other.allow, &pace->e_perm, flags);
- pace->e_id = ACL_UNDEFINED_ID;
return pacl;
out_err:
@@ -586,12 +620,13 @@ static inline void deny_bits(struct posix_ace_state *astate, u32 mask)
astate->deny |= mask & ~astate->allow;
}
-static int find_uid(struct posix_acl_state *state, struct posix_ace_state_array *a, uid_t uid)
+static int find_uid(struct posix_acl_state *state, kuid_t uid)
{
+ struct posix_ace_state_array *a = state->users;
int i;
for (i = 0; i < a->n; i++)
- if (a->aces[i].uid == uid)
+ if (uid_eq(a->aces[i].uid, uid))
return i;
/* Not found: */
a->n++;
@@ -602,6 +637,23 @@ static int find_uid(struct posix_acl_state *state, struct posix_ace_state_array
return i;
}
+static int find_gid(struct posix_acl_state *state, kgid_t gid)
+{
+ struct posix_ace_state_array *a = state->groups;
+ int i;
+
+ for (i = 0; i < a->n; i++)
+ if (gid_eq(a->aces[i].gid, gid))
+ return i;
+ /* Not found: */
+ a->n++;
+ a->aces[i].gid = gid;
+ a->aces[i].perms.allow = state->everyone.allow;
+ a->aces[i].perms.deny = state->everyone.deny;
+
+ return i;
+}
+
static void deny_bits_array(struct posix_ace_state_array *a, u32 mask)
{
int i;
@@ -635,7 +687,7 @@ static void process_one_v4_ace(struct posix_acl_state *state,
}
break;
case ACL_USER:
- i = find_uid(state, state->users, ace->who);
+ i = find_uid(state, ace->who_uid);
if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
allow_bits(&state->users->aces[i].perms, mask);
} else {
@@ -657,7 +709,7 @@ static void process_one_v4_ace(struct posix_acl_state *state,
}
break;
case ACL_GROUP:
- i = find_uid(state, state->groups, ace->who);
+ i = find_gid(state, ace->who_gid);
if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
allow_bits(&state->groups->aces[i].perms, mask);
} else {
@@ -689,8 +741,9 @@ static void process_one_v4_ace(struct posix_acl_state *state,
}
}
-int nfs4_acl_nfsv4_to_posix(struct nfs4_acl *acl, struct posix_acl **pacl,
- struct posix_acl **dpacl, unsigned int flags)
+static int nfs4_acl_nfsv4_to_posix(struct nfs4_acl *acl,
+ struct posix_acl **pacl, struct posix_acl **dpacl,
+ unsigned int flags)
{
struct posix_acl_state effective_acl_state, default_acl_state;
struct nfs4_ace *ace;
@@ -750,6 +803,57 @@ out_estate:
return ret;
}
+__be32
+nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct nfs4_acl *acl)
+{
+ __be32 error;
+ int host_error;
+ struct dentry *dentry;
+ struct inode *inode;
+ struct posix_acl *pacl = NULL, *dpacl = NULL;
+ unsigned int flags = 0;
+
+ /* Get inode */
+ error = fh_verify(rqstp, fhp, 0, NFSD_MAY_SATTR);
+ if (error)
+ return error;
+
+ dentry = fhp->fh_dentry;
+ inode = dentry->d_inode;
+
+ if (!inode->i_op->set_acl || !IS_POSIXACL(inode))
+ return nfserr_attrnotsupp;
+
+ if (S_ISDIR(inode->i_mode))
+ flags = NFS4_ACL_DIR;
+
+ host_error = nfs4_acl_nfsv4_to_posix(acl, &pacl, &dpacl, flags);
+ if (host_error == -EINVAL)
+ return nfserr_attrnotsupp;
+ if (host_error < 0)
+ goto out_nfserr;
+
+ host_error = inode->i_op->set_acl(inode, pacl, ACL_TYPE_ACCESS);
+ if (host_error < 0)
+ goto out_release;
+
+ if (S_ISDIR(inode->i_mode)) {
+ host_error = inode->i_op->set_acl(inode, dpacl,
+ ACL_TYPE_DEFAULT);
+ }
+
+out_release:
+ posix_acl_release(pacl);
+ posix_acl_release(dpacl);
+out_nfserr:
+ if (host_error == -EOPNOTSUPP)
+ return nfserr_attrnotsupp;
+ else
+ return nfserrno(host_error);
+}
+
+
static short
ace2type(struct nfs4_ace *ace)
{
@@ -768,9 +872,6 @@ ace2type(struct nfs4_ace *ace)
return -1;
}
-EXPORT_SYMBOL(nfs4_acl_posix_to_nfsv4);
-EXPORT_SYMBOL(nfs4_acl_nfsv4_to_posix);
-
struct nfs4_acl *
nfs4_acl_new(int n)
{
@@ -818,21 +919,21 @@ nfs4_acl_get_whotype(char *p, u32 len)
return NFS4_ACL_WHO_NAMED;
}
-int
-nfs4_acl_write_who(int who, char *p)
+__be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who)
{
+ __be32 *p;
int i;
for (i = 0; i < ARRAY_SIZE(s2t_map); i++) {
- if (s2t_map[i].type == who) {
- memcpy(p, s2t_map[i].string, s2t_map[i].stringlen);
- return s2t_map[i].stringlen;
- }
+ if (s2t_map[i].type != who)
+ continue;
+ p = xdr_reserve_space(xdr, s2t_map[i].stringlen + 4);
+ if (!p)
+ return nfserr_resource;
+ p = xdr_encode_opaque(p, s2t_map[i].string,
+ s2t_map[i].stringlen);
+ return 0;
}
- BUG();
+ WARN_ON_ONCE(1);
return -1;
}
-
-EXPORT_SYMBOL(nfs4_acl_new);
-EXPORT_SYMBOL(nfs4_acl_get_whotype);
-EXPORT_SYMBOL(nfs4_acl_write_who);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:49:36 +0000