[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs3acl.c

#include <linux/fs.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs_fs.h>
#include <linux/xattr_acl.h>
#include <linux/nfsacl.h>

#define NFSDBG_FACILITY	NFSDBG_PROC

ssize_t nfs3_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
	struct inode *inode = dentry->d_inode;
	struct posix_acl *acl;
	int pos=0, len=0;

#	define output(s) do {						\
			if (pos + sizeof(s) <= size) {			\
				memcpy(buffer + pos, s, sizeof(s));	\
				pos += sizeof(s);			\
			}						\
			len += sizeof(s);				\
		} while(0)

	acl = nfs3_proc_getacl(inode, ACL_TYPE_ACCESS);
	if (IS_ERR(acl))
		return PTR_ERR(acl);
	if (acl) {
		output("system.posix_acl_access");
		posix_acl_release(acl);
	}

	if (S_ISDIR(inode->i_mode)) {
		acl = nfs3_proc_getacl(inode, ACL_TYPE_DEFAULT);
		if (IS_ERR(acl))
			return PTR_ERR(acl);
		if (acl) {
			output("system.posix_acl_default");
			posix_acl_release(acl);
		}
	}

#	undef output

	if (!buffer || len <= size)
		return len;
	return -ERANGE;
}

ssize_t nfs3_getxattr(struct dentry *dentry, const char *name,
		void *buffer, size_t size)
{
	struct inode *inode = dentry->d_inode;
	struct posix_acl *acl;
	int type, error = 0;

	if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0)
		type = ACL_TYPE_ACCESS;
	else if (strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0)
		type = ACL_TYPE_DEFAULT;
	else
		return -EOPNOTSUPP;

	acl = nfs3_proc_getacl(inode, type);
	if (IS_ERR(acl))
		return PTR_ERR(acl);
	else if (acl) {
		if (type == ACL_TYPE_ACCESS && acl->a_count == 0)
			error = -ENODATA;
		else
			error = posix_acl_to_xattr(acl, buffer, size);
		posix_acl_release(acl);
	} else
		error = -ENODATA;

	return error;
}

int nfs3_setxattr(struct dentry *dentry, const char *name,
	     const void *value, size_t size, int flags)
{
	struct inode *inode = dentry->d_inode;
	struct posix_acl *acl;
	int type, error;

	if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0)
		type = ACL_TYPE_ACCESS;
	else if (strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0)
		type = ACL_TYPE_DEFAULT;
	else
		return -EOPNOTSUPP;

	acl = posix_acl_from_xattr(value, size);
	if (IS_ERR(acl))
		return PTR_ERR(acl);
	error = nfs3_proc_setacl(inode, type, acl);
	posix_acl_release(acl);

	return error;
}

int nfs3_removexattr(struct dentry *dentry, const char *name)
{
	struct inode *inode = dentry->d_inode;
	int type;

	if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0)
		type = ACL_TYPE_ACCESS;
	else if (strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0)
		type = ACL_TYPE_DEFAULT;
	else
		return -EOPNOTSUPP;

	return nfs3_proc_setacl(inode, type, NULL);
}

static void __nfs3_forget_cached_acls(struct nfs_inode *nfsi)
{
	if (!IS_ERR(nfsi->acl_access)) {
		posix_acl_release(nfsi->acl_access);
		nfsi->acl_access = ERR_PTR(-EAGAIN);
	}
	if (!IS_ERR(nfsi->acl_default)) {
		posix_acl_release(nfsi->acl_default);
		nfsi->acl_default = ERR_PTR(-EAGAIN);
	}
}

void nfs3_forget_cached_acls(struct inode *inode)
{
	dprintk("NFS: nfs3_forget_cached_acls(%s/%ld)\n", inode->i_sb->s_id,
		inode->i_ino);
	spin_lock(&inode->i_lock);
	__nfs3_forget_cached_acls(NFS_I(inode));
	spin_unlock(&inode->i_lock);
}

static struct posix_acl *nfs3_get_cached_acl(struct inode *inode, int type)
{
	struct nfs_inode *nfsi = NFS_I(inode);
	struct posix_acl *acl = ERR_PTR(-EINVAL);

	spin_lock(&inode->i_lock);
	switch(type) {
		case ACL_TYPE_ACCESS:
			acl = nfsi->acl_access;
			break;

		case ACL_TYPE_DEFAULT:
			acl = nfsi->acl_default;
			break;

		default:
			goto out;
	}
	if (IS_ERR(acl))
		acl = ERR_PTR(-EAGAIN);
	else
		acl = posix_acl_dup(acl);
out:
	spin_unlock(&inode->i_lock);
	dprintk("NFS: nfs3_get_cached_acl(%s/%ld, %d) = %p\n", inode->i_sb->s_id,
		inode->i_ino, type, acl);
	return acl;
}

static void nfs3_cache_acls(struct inode *inode, struct posix_acl *acl,
		    struct posix_acl *dfacl)
{
	struct nfs_inode *nfsi = NFS_I(inode);

	dprintk("nfs3_cache_acls(%s/%ld, %p, %p)\n", inode->i_sb->s_id,
		inode->i_ino, acl, dfacl);
	spin_lock(&inode->i_lock);
	__nfs3_forget_cached_acls(NFS_I(inode));
	nfsi->acl_access = posix_acl_dup(acl);
	nfsi->acl_default = posix_acl_dup(dfacl);
	spin_unlock(&inode->i_lock);
}

struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
{
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs_fattr fattr;
	struct page *pages[NFSACL_MAXPAGES] = { };
	struct nfs3_getaclargs args = {
		.fh = NFS_FH(inode),
		/* The xdr layer may allocate pages here. */
		.pages = pages,
	};
	struct nfs3_getaclres res = {
		.fattr =	&fattr,
	};
	struct posix_acl *acl;
	int status, count;

	if (!nfs_server_capable(inode, NFS_CAP_ACLS))
		return ERR_PTR(-EOPNOTSUPP);

	status = nfs_revalidate_inode(server, inode);
	if (status < 0)
		return ERR_PTR(status);
	acl = nfs3_get_cached_acl(inode, type);
	if (acl != ERR_PTR(-EAGAIN))
		return acl;
	acl = NULL;

	/*
	 * Only get the access acl when explicitly requested: We don't
	 * need it for access decisions, and only some applications use
	 * it. Applications which request the access acl first are not
	 * penalized from this optimization.
	 */
	if (type == ACL_TYPE_ACCESS)
		args.mask |= NFS_ACLCNT|NFS_ACL;
	if (S_ISDIR(inode->i_mode))
		args.mask |= NFS_DFACLCNT|NFS_DFACL;
	if (args.mask == 0)
		return NULL;

	dprintk("NFS call getacl\n");
	status = rpc_call(server->client_acl, ACLPROC3_GETACL,
			  &args, &res, 0);
	dprintk("NFS reply getacl: %d\n", status);

	/* pages may have been allocated at the xdr layer. */
	for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
		__free_page(args.pages[count]);

	switch (status) {
		case 0:
			status = nfs_refresh_inode(inode, &fattr);
			break;
		case -EPFNOSUPPORT:
		case -EPROTONOSUPPORT:
			dprintk("NFS_V3_ACL extension not supported; disabling\n");
			server->caps &= ~NFS_CAP_ACLS;
		case -ENOTSUPP:
			status = -EOPNOTSUPP;
		default:
			goto getout;
	}
	if ((args.mask & res.mask) != args.mask) {
		status = -EIO;
		goto getout;
	}

	if (res.acl_access != NULL) {
		if (posix_acl_equiv_mode(res.acl_access, NULL) == 0) {
			posix_acl_release(res.acl_access);
			res.acl_access = NULL;
		}
	}
	nfs3_cache_acls(inode, res.acl_access, res.acl_default);

	switch(type) {
		case ACL_TYPE_ACCESS:
			acl = res.acl_access;
			res.acl_access = NULL;
			break;

		case ACL_TYPE_DEFAULT:
			acl = res.acl_default;
			res.acl_default = NULL;
	}

getout:
	posix_acl_release(res.acl_access);
	posix_acl_release(res.acl_default);

	if (status != 0) {
		posix_acl_release(acl);
		acl = ERR_PTR(status);
	}
	return acl;
}

static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
		  struct posix_acl *dfacl)
{
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs_fattr fattr;
	struct page *pages[NFSACL_MAXPAGES] = { };
	struct nfs3_setaclargs args = {
		.inode = inode,
		.mask = NFS_ACL,
		.acl_access = acl,
		.pages = pages,
	};
	int status, count;

	status = -EOPNOTSUPP;
	if (!nfs_server_capable(inode, NFS_CAP_ACLS))
		goto out;

	/* We are doing this here, because XDR marshalling can only
	   return -ENOMEM. */
	status = -ENOSPC;
	if (acl != NULL && acl->a_count > NFS_ACL_MAX_ENTRIES)
		goto out;
	if (dfacl != NULL && dfacl->a_count > NFS_ACL_MAX_ENTRIES)
		goto out;
	if (S_ISDIR(inode->i_mode)) {
		args.mask |= NFS_DFACL;
		args.acl_default = dfacl;
	}

	dprintk("NFS call setacl\n");
	nfs_begin_data_update(inode);
	status = rpc_call(server->client_acl, ACLPROC3_SETACL,
			  &args, &fattr, 0);
	NFS_FLAGS(inode) |= NFS_INO_INVALID_ACCESS;
	nfs_end_data_update(inode);
	dprintk("NFS reply setacl: %d\n", status);

	/* pages may have been allocated at the xdr layer. */
	for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
		__free_page(args.pages[count]);

	switch (status) {
		case 0:
			status = nfs_refresh_inode(inode, &fattr);
			break;
		case -EPFNOSUPPORT:
		case -EPROTONOSUPPORT:
			dprintk("NFS_V3_ACL SETACL RPC not supported"
					"(will not retry)\n");
			server->caps &= ~NFS_CAP_ACLS;
		case -ENOTSUPP:
			status = -EOPNOTSUPP;
	}
out:
	return status;
}

int nfs3_proc_setacl(struct inode *inode, int type, struct posix_acl *acl)
{
	struct posix_acl *alloc = NULL, *dfacl = NULL;
	int status;

	if (S_ISDIR(inode->i_mode)) {
		switch(type) {
			case ACL_TYPE_ACCESS:
				alloc = dfacl = nfs3_proc_getacl(inode,
						ACL_TYPE_DEFAULT);
				if (IS_ERR(alloc))
					goto fail;
				break;

			case ACL_TYPE_DEFAULT:
				dfacl = acl;
				alloc = acl = nfs3_proc_getacl(inode,
						ACL_TYPE_ACCESS);
				if (IS_ERR(alloc))
					goto fail;
				break;

			default:
				return -EINVAL;
		}
	} else if (type != ACL_TYPE_ACCESS)
			return -EINVAL;

	if (acl == NULL) {
		alloc = acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
		if (IS_ERR(alloc))
			goto fail;
	}
	status = nfs3_proc_setacls(inode, acl, dfacl);
	posix_acl_release(alloc);
	return status;

fail:
	return PTR_ERR(alloc);
}

int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
		mode_t mode)
{
	struct posix_acl *dfacl, *acl;
	int error = 0;

	dfacl = nfs3_proc_getacl(dir, ACL_TYPE_DEFAULT);
	if (IS_ERR(dfacl)) {
		error = PTR_ERR(dfacl);
		return (error == -EOPNOTSUPP) ? 0 : error;
	}
	if (!dfacl)
		return 0;
	acl = posix_acl_clone(dfacl, GFP_KERNEL);
	error = -ENOMEM;
	if (!acl)
		goto out_release_dfacl;
	error = posix_acl_create_masq(acl, &mode);
	if (error < 0)
		goto out_release_acl;
	error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
						      dfacl : NULL);
out_release_acl:
	posix_acl_release(acl);
out_release_dfacl:
	posix_acl_release(dfacl);
	return error;
}
Commit	Line	Data
b7fa0554 AG	1	#include <linux/fs.h>
	2	#include <linux/nfs.h>
	3	#include <linux/nfs3.h>
	4	#include <linux/nfs_fs.h>
	5	#include <linux/xattr_acl.h>
	6	#include <linux/nfsacl.h>
	7
	8	#define NFSDBG_FACILITY NFSDBG_PROC
	9
	10	ssize_t nfs3_listxattr(struct dentry dentry, char buffer, size_t size)
	11	{
	12	struct inode *inode = dentry->d_inode;
	13	struct posix_acl *acl;
	14	int pos=0, len=0;
	15
	16	# define output(s) do { \
	17	if (pos + sizeof(s) <= size) { \
	18	memcpy(buffer + pos, s, sizeof(s)); \
	19	pos += sizeof(s); \
	20	} \
	21	len += sizeof(s); \
	22	} while(0)
	23
	24	acl = nfs3_proc_getacl(inode, ACL_TYPE_ACCESS);
	25	if (IS_ERR(acl))
	26	return PTR_ERR(acl);
	27	if (acl) {
	28	output("system.posix_acl_access");
	29	posix_acl_release(acl);
	30	}
	31
	32	if (S_ISDIR(inode->i_mode)) {
	33	acl = nfs3_proc_getacl(inode, ACL_TYPE_DEFAULT);
	34	if (IS_ERR(acl))
	35	return PTR_ERR(acl);
	36	if (acl) {
	37	output("system.posix_acl_default");
	38	posix_acl_release(acl);
	39	}
	40	}
	41
	42	# undef output
	43
	44	if (!buffer \|\| len <= size)
	45	return len;
	46	return -ERANGE;
	47	}
	48
	49	ssize_t nfs3_getxattr(struct dentry dentry, const char name,
	50	void *buffer, size_t size)
	51	{
	52	struct inode *inode = dentry->d_inode;
	53	struct posix_acl *acl;
	54	int type, error = 0;
	55
	56	if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0)
	57	type = ACL_TYPE_ACCESS;
	58	else if (strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0)
	59	type = ACL_TYPE_DEFAULT;
	60	else
	61	return -EOPNOTSUPP;
	62
	63	acl = nfs3_proc_getacl(inode, type);
	64	if (IS_ERR(acl))
65	return PTR_ERR(acl);
66	else if (acl) {
67	if (type == ACL_TYPE_ACCESS && acl->a_count == 0)
68	error = -ENODATA;
69	else
70	error = posix_acl_to_xattr(acl, buffer, size);
71	posix_acl_release(acl);
72	} else
73	error = -ENODATA;
74
75	return error;
76	}
77
78	int nfs3_setxattr(struct dentry dentry, const char name,
79	const void *value, size_t size, int flags)
80	{
81	struct inode *inode = dentry->d_inode;
82	struct posix_acl *acl;
83	int type, error;
84
85	if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0)
86	type = ACL_TYPE_ACCESS;
87	else if (strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0)
88	type = ACL_TYPE_DEFAULT;
89	else
90	return -EOPNOTSUPP;
91
92	acl = posix_acl_from_xattr(value, size);
93	if (IS_ERR(acl))
94	return PTR_ERR(acl);
95	error = nfs3_proc_setacl(inode, type, acl);
96	posix_acl_release(acl);
97
98	return error;
99	}
100
101	int nfs3_removexattr(struct dentry dentry, const char name)
102	{
103	struct inode *inode = dentry->d_inode;
104	int type;
105
106	if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0)
107	type = ACL_TYPE_ACCESS;
108	else if (strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0)
109	type = ACL_TYPE_DEFAULT;
110	else
111	return -EOPNOTSUPP;
112
113	return nfs3_proc_setacl(inode, type, NULL);
114	}
115
5c6a9f7d AG	116	static void __nfs3_forget_cached_acls(struct nfs_inode *nfsi)
5c6a9f7d AG	117	{
458818ed	118	if (!IS_ERR(nfsi->acl_access)) {
5c6a9f7d AG	119	posix_acl_release(nfsi->acl_access);
	120	nfsi->acl_access = ERR_PTR(-EAGAIN);
	121	}
458818ed	122	if (!IS_ERR(nfsi->acl_default)) {
5c6a9f7d AG	123	posix_acl_release(nfsi->acl_default);
	124	nfsi->acl_default = ERR_PTR(-EAGAIN);
	125	}
	126	}
	127
	128	void nfs3_forget_cached_acls(struct inode *inode)
	129	{
	130	dprintk("NFS: nfs3_forget_cached_acls(%s/%ld)\n", inode->i_sb->s_id,
	131	inode->i_ino);
	132	spin_lock(&inode->i_lock);
	133	__nfs3_forget_cached_acls(NFS_I(inode));
	134	spin_unlock(&inode->i_lock);
	135	}
	136
	137	static struct posix_acl nfs3_get_cached_acl(struct inode inode, int type)
	138	{
	139	struct nfs_inode *nfsi = NFS_I(inode);
458818ed	140	struct posix_acl *acl = ERR_PTR(-EINVAL);
5c6a9f7d AG	141
	142	spin_lock(&inode->i_lock);
	143	switch(type) {
	144	case ACL_TYPE_ACCESS:
	145	acl = nfsi->acl_access;
	146	break;
	147
	148	case ACL_TYPE_DEFAULT:
	149	acl = nfsi->acl_default;
	150	break;
	151
	152	default:
458818ed	153	goto out;
5c6a9f7d	154	}
458818ed	155	if (IS_ERR(acl))
5c6a9f7d AG	156	acl = ERR_PTR(-EAGAIN);
	157	else
	158	acl = posix_acl_dup(acl);
458818ed	159	out:
5c6a9f7d AG	160	spin_unlock(&inode->i_lock);
	161	dprintk("NFS: nfs3_get_cached_acl(%s/%ld, %d) = %p\n", inode->i_sb->s_id,
	162	inode->i_ino, type, acl);
	163	return acl;
	164	}
	165
	166	static void nfs3_cache_acls(struct inode inode, struct posix_acl acl,
	167	struct posix_acl *dfacl)
	168	{
	169	struct nfs_inode *nfsi = NFS_I(inode);
	170
	171	dprintk("nfs3_cache_acls(%s/%ld, %p, %p)\n", inode->i_sb->s_id,
	172	inode->i_ino, acl, dfacl);
	173	spin_lock(&inode->i_lock);
	174	__nfs3_forget_cached_acls(NFS_I(inode));
	175	nfsi->acl_access = posix_acl_dup(acl);
	176	nfsi->acl_default = posix_acl_dup(dfacl);
	177	spin_unlock(&inode->i_lock);
	178	}
	179
b7fa0554 AG	180	struct posix_acl nfs3_proc_getacl(struct inode inode, int type)
	181	{
	182	struct nfs_server *server = NFS_SERVER(inode);
	183	struct nfs_fattr fattr;
	184	struct page *pages[NFSACL_MAXPAGES] = { };
	185	struct nfs3_getaclargs args = {
	186	.fh = NFS_FH(inode),
	187	/* The xdr layer may allocate pages here. */
	188	.pages = pages,
	189	};
	190	struct nfs3_getaclres res = {
	191	.fattr = &fattr,
	192	};
5c6a9f7d	193	struct posix_acl *acl;
b7fa0554 AG	194	int status, count;
	195
	196	if (!nfs_server_capable(inode, NFS_CAP_ACLS))
	197	return ERR_PTR(-EOPNOTSUPP);
	198
5c6a9f7d AG	199	status = nfs_revalidate_inode(server, inode);
	200	if (status < 0)
	201	return ERR_PTR(status);
	202	acl = nfs3_get_cached_acl(inode, type);
	203	if (acl != ERR_PTR(-EAGAIN))
	204	return acl;
	205	acl = NULL;
b7fa0554	206
5c6a9f7d AG	207	/*
	208	* Only get the access acl when explicitly requested: We don't
	209	* need it for access decisions, and only some applications use
	210	* it. Applications which request the access acl first are not
	211	* penalized from this optimization.
	212	*/
	213	if (type == ACL_TYPE_ACCESS)
	214	args.mask \|= NFS_ACLCNT\|NFS_ACL;
	215	if (S_ISDIR(inode->i_mode))
	216	args.mask \|= NFS_DFACLCNT\|NFS_DFACL;
	217	if (args.mask == 0)
	218	return NULL;
b7fa0554 AG	219
	220	dprintk("NFS call getacl\n");
	221	status = rpc_call(server->client_acl, ACLPROC3_GETACL,
	222	&args, &res, 0);
	223	dprintk("NFS reply getacl: %d\n", status);
	224
	225	/* pages may have been allocated at the xdr layer. */
	226	for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
	227	__free_page(args.pages[count]);
	228
	229	switch (status) {
	230	case 0:
	231	status = nfs_refresh_inode(inode, &fattr);
	232	break;
	233	case -EPFNOSUPPORT:
	234	case -EPROTONOSUPPORT:
	235	dprintk("NFS_V3_ACL extension not supported; disabling\n");
	236	server->caps &= ~NFS_CAP_ACLS;
	237	case -ENOTSUPP:
	238	status = -EOPNOTSUPP;
	239	default:
	240	goto getout;
	241	}
	242	if ((args.mask & res.mask) != args.mask) {
	243	status = -EIO;
	244	goto getout;
	245	}
	246
	247	if (res.acl_access != NULL) {
	248	if (posix_acl_equiv_mode(res.acl_access, NULL) == 0) {
	249	posix_acl_release(res.acl_access);
	250	res.acl_access = NULL;
	251	}
	252	}
5c6a9f7d	253	nfs3_cache_acls(inode, res.acl_access, res.acl_default);
b7fa0554 AG	254
	255	switch(type) {
	256	case ACL_TYPE_ACCESS:
	257	acl = res.acl_access;
	258	res.acl_access = NULL;
	259	break;
	260
	261	case ACL_TYPE_DEFAULT:
	262	acl = res.acl_default;
	263	res.acl_default = NULL;
	264	}
	265
	266	getout:
	267	posix_acl_release(res.acl_access);
	268	posix_acl_release(res.acl_default);
	269
	270	if (status != 0) {
	271	posix_acl_release(acl);
	272	acl = ERR_PTR(status);
	273	}
	274	return acl;
	275	}
	276
	277	static int nfs3_proc_setacls(struct inode inode, struct posix_acl acl,
	278	struct posix_acl *dfacl)
	279	{
	280	struct nfs_server *server = NFS_SERVER(inode);
	281	struct nfs_fattr fattr;
	282	struct page *pages[NFSACL_MAXPAGES] = { };
	283	struct nfs3_setaclargs args = {
	284	.inode = inode,
	285	.mask = NFS_ACL,
	286	.acl_access = acl,
	287	.pages = pages,
	288	};
	289	int status, count;
	290
	291	status = -EOPNOTSUPP;
	292	if (!nfs_server_capable(inode, NFS_CAP_ACLS))
	293	goto out;
	294
	295	/* We are doing this here, because XDR marshalling can only
	296	return -ENOMEM. */
	297	status = -ENOSPC;
	298	if (acl != NULL && acl->a_count > NFS_ACL_MAX_ENTRIES)
	299	goto out;
	300	if (dfacl != NULL && dfacl->a_count > NFS_ACL_MAX_ENTRIES)
	301	goto out;
	302	if (S_ISDIR(inode->i_mode)) {
	303	args.mask \|= NFS_DFACL;
	304	args.acl_default = dfacl;
	305	}
	306
	307	dprintk("NFS call setacl\n");
	308	nfs_begin_data_update(inode);
	309	status = rpc_call(server->client_acl, ACLPROC3_SETACL,
	310	&args, &fattr, 0);
	311	NFS_FLAGS(inode) \|= NFS_INO_INVALID_ACCESS;
	312	nfs_end_data_update(inode);
	313	dprintk("NFS reply setacl: %d\n", status);
	314
	315	/* pages may have been allocated at the xdr layer. */
	316	for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
	317	__free_page(args.pages[count]);
318
319	switch (status) {
320	case 0:
321	status = nfs_refresh_inode(inode, &fattr);
322	break;
323	case -EPFNOSUPPORT:
324	case -EPROTONOSUPPORT:
325	dprintk("NFS_V3_ACL SETACL RPC not supported"
326	"(will not retry)\n");
327	server->caps &= ~NFS_CAP_ACLS;
328	case -ENOTSUPP:
329	status = -EOPNOTSUPP;
330	}
331	out:
332	return status;
333	}
334
335	int nfs3_proc_setacl(struct inode inode, int type, struct posix_acl acl)
336	{
337	struct posix_acl alloc = NULL, dfacl = NULL;
338	int status;
339
340	if (S_ISDIR(inode->i_mode)) {
341	switch(type) {
342	case ACL_TYPE_ACCESS:
343	alloc = dfacl = nfs3_proc_getacl(inode,
344	ACL_TYPE_DEFAULT);
345	if (IS_ERR(alloc))
346	goto fail;
347	break;
348
349	case ACL_TYPE_DEFAULT:
350	dfacl = acl;
351	alloc = acl = nfs3_proc_getacl(inode,
352	ACL_TYPE_ACCESS);
353	if (IS_ERR(alloc))
354	goto fail;
355	break;
356
357	default:
358	return -EINVAL;
359	}
360	} else if (type != ACL_TYPE_ACCESS)
361	return -EINVAL;
362
363	if (acl == NULL) {
364	alloc = acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
365	if (IS_ERR(alloc))
366	goto fail;
367	}
368	status = nfs3_proc_setacls(inode, acl, dfacl);
369	posix_acl_release(alloc);
370	return status;
371
372	fail:
373	return PTR_ERR(alloc);
374	}
055ffbea AG	375
	376	int nfs3_proc_set_default_acl(struct inode dir, struct inode inode,
	377	mode_t mode)
	378	{
	379	struct posix_acl dfacl, acl;
	380	int error = 0;
	381
	382	dfacl = nfs3_proc_getacl(dir, ACL_TYPE_DEFAULT);
	383	if (IS_ERR(dfacl)) {
	384	error = PTR_ERR(dfacl);
	385	return (error == -EOPNOTSUPP) ? 0 : error;
	386	}
	387	if (!dfacl)
	388	return 0;
	389	acl = posix_acl_clone(dfacl, GFP_KERNEL);
	390	error = -ENOMEM;
	391	if (!acl)
	392	goto out_release_dfacl;
	393	error = posix_acl_create_masq(acl, &mode);
	394	if (error < 0)
	395	goto out_release_acl;
	396	error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
	397	dfacl : NULL);
	398	out_release_acl:
	399	posix_acl_release(acl);
	400	out_release_dfacl:
	401	posix_acl_release(dfacl);
	402	return error;
	403	}