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NFS: Additional refactoring for fs_context conversion

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Split out from commit "NFS: Add fs_context support."

This patch adds additional refactoring for the conversion of NFS to use
fs_context, namely:

 (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context.
     nfs_clone_mount has had several fields removed, and nfs_mount_info
     has been removed altogether.
 (*) Various functions now take an fs_context as an argument instead
     of nfs_mount_info, nfs_fs_context, etc.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Scott Mayhew
2019-12-10 07:31:14 -05:00
committed by Anna Schumaker
parent f2aedb713c
commit 62a55d088c
13 changed files with 203 additions and 272 deletions
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155
fs/nfs/fs_context.c
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@@ -241,43 +241,6 @@ static const struct constant_table nfs_secflavor_tokens[] = {
{ "sys", Opt_sec_sys },
};
struct nfs_fs_context *nfs_alloc_parsed_mount_data(void)
{
struct nfs_fs_context *ctx;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (ctx) {
ctx->timeo = NFS_UNSPEC_TIMEO;
ctx->retrans = NFS_UNSPEC_RETRANS;
ctx->acregmin = NFS_DEF_ACREGMIN;
ctx->acregmax = NFS_DEF_ACREGMAX;
ctx->acdirmin = NFS_DEF_ACDIRMIN;
ctx->acdirmax = NFS_DEF_ACDIRMAX;
ctx->mount_server.port = NFS_UNSPEC_PORT;
ctx->nfs_server.port = NFS_UNSPEC_PORT;
ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP;
ctx->selected_flavor = RPC_AUTH_MAXFLAVOR;
ctx->minorversion = 0;
ctx->need_mount = true;
ctx->net = current->nsproxy->net_ns;
ctx->lsm_opts = NULL;
}
return ctx;
}
void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx)
{
if (ctx) {
kfree(ctx->client_address);
kfree(ctx->mount_server.hostname);
kfree(ctx->nfs_server.export_path);
kfree(ctx->nfs_server.hostname);
kfree(ctx->fscache_uniq);
security_free_mnt_opts(&ctx->lsm_opts);
kfree(ctx);
}
}
/*
* Sanity-check a server address provided by the mount command.
*
@@ -342,7 +305,7 @@ static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx)
* Add 'flavor' to 'auth_info' if not already present.
* Returns true if 'flavor' ends up in the list, false otherwise
*/
static int nfs_auth_info_add(struct nfs_fs_context *ctx,
static int nfs_auth_info_add(struct fs_context *fc,
struct nfs_auth_info *auth_info,
rpc_authflavor_t flavor)
{
@@ -367,9 +330,10 @@ static int nfs_auth_info_add(struct nfs_fs_context *ctx,
/*
* Parse the value of the 'sec=' option.
*/
static int nfs_parse_security_flavors(struct nfs_fs_context *ctx,
static int nfs_parse_security_flavors(struct fs_context *fc,
struct fs_parameter *param)
{
struct nfs_fs_context *ctx = nfs_fc2context(fc);
rpc_authflavor_t pseudoflavor;
char *string = param->string, *p;
int ret;
@@ -419,7 +383,7 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx,
return -EINVAL;
}
ret = nfs_auth_info_add(ctx, &ctx->auth_info, pseudoflavor);
ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor);
if (ret < 0)
return ret;
}
@@ -427,9 +391,11 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx,
return 0;
}
static int nfs_parse_version_string(struct nfs_fs_context *ctx,
static int nfs_parse_version_string(struct fs_context *fc,
const char *string)
{
struct nfs_fs_context *ctx = nfs_fc2context(fc);
ctx->flags &= ~NFS_MOUNT_VER3;
switch (lookup_constant(nfs_vers_tokens, string, -1)) {
case Opt_vers_2:
@@ -656,17 +622,17 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
* options that take text values
*/
case Opt_v:
ret = nfs_parse_version_string(ctx, param->key + 1);
ret = nfs_parse_version_string(fc, param->key + 1);
if (ret < 0)
return ret;
break;
case Opt_vers:
ret = nfs_parse_version_string(ctx, param->string);
ret = nfs_parse_version_string(fc, param->string);
if (ret < 0)
return ret;
break;
case Opt_sec:
ret = nfs_parse_security_flavors(ctx, param);
ret = nfs_parse_security_flavors(fc, param);
if (ret < 0)
return ret;
break;
@@ -729,7 +695,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
break;
case Opt_addr:
len = rpc_pton(ctx->net, param->string, param->size,
len = rpc_pton(fc->net_ns, param->string, param->size,
&ctx->nfs_server.address,
sizeof(ctx->nfs_server._address));
if (len == 0)
@@ -747,7 +713,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
param->string = NULL;
break;
case Opt_mountaddr:
len = rpc_pton(ctx->net, param->string, param->size,
len = rpc_pton(fc->net_ns, param->string, param->size,
&ctx->mount_server.address,
sizeof(ctx->mount_server._address));
if (len == 0)
@@ -819,7 +785,7 @@ out_of_bounds:
}
/*
* Split "dev_name" into "hostname:export_path".
* Split fc->source into "hostname:export_path".
*
* The leftmost colon demarks the split between the server's hostname
* and the export path. If the hostname starts with a left square
@@ -827,12 +793,13 @@ out_of_bounds:
*
* Note: caller frees hostname and export path, even on error.
*/
static int nfs_parse_devname(struct nfs_fs_context *ctx,
const char *dev_name,
size_t maxnamlen, size_t maxpathlen)
static int nfs_parse_source(struct fs_context *fc,
size_t maxnamlen, size_t maxpathlen)
{
struct nfs_fs_context *ctx = nfs_fc2context(fc);
const char *dev_name = fc->source;
size_t len;
char *end;
const char *end;
if (unlikely(!dev_name || !*dev_name)) {
dfprintk(MOUNT, "NFS: device name not specified\n");
@@ -848,7 +815,7 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx,
len = end - dev_name;
end++;
} else {
char *comma;
const char *comma;
end = strchr(dev_name, ':');
if (end == NULL)
@@ -856,8 +823,8 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx,
len = end - dev_name;
/* kill possible hostname list: not supported */
comma = strchr(dev_name, ',');
if (comma != NULL && comma < end)
comma = memchr(dev_name, ',', len);
if (comma)
len = comma - dev_name;
}
@@ -920,7 +887,7 @@ static int nfs23_parse_monolithic(struct fs_context *fc,
struct nfs_mount_data *data)
{
struct nfs_fs_context *ctx = nfs_fc2context(fc);
struct nfs_fh *mntfh = ctx->mount_info.mntfh;
struct nfs_fh *mntfh = ctx->mntfh;
struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address;
int extra_flags = NFS_MOUNT_LEGACY_INTERFACE;
@@ -1009,6 +976,7 @@ static int nfs23_parse_monolithic(struct fs_context *fc,
else
ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK|
NFS_MOUNT_LOCAL_FCNTL);
/*
* The legacy version 6 binary mount data from userspace has a
* field used only to transport selinux information into the
@@ -1073,12 +1041,6 @@ out_invalid_fh:
}
#if IS_ENABLED(CONFIG_NFS_V4)
static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx)
{
ctx->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
}
/*
* Validate NFSv4 mount options
*/
@@ -1251,20 +1213,22 @@ static int nfs_fs_context_validate(struct fs_context *fc)
goto out_no_address;
if (ctx->version == 4) {
#if IS_ENABLED(CONFIG_NFS_V4)
if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
port = NFS_RDMA_PORT;
else
port = NFS_PORT;
max_namelen = NFS4_MAXNAMLEN;
max_pathlen = NFS4_MAXPATHLEN;
nfs_validate_transport_protocol(ctx);
if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP)
goto out_invalid_transport_udp;
nfs4_validate_mount_flags(ctx);
#else
goto out_v4_not_compiled;
#endif /* CONFIG_NFS_V4 */
if (IS_ENABLED(CONFIG_NFS_V4)) {
if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
port = NFS_RDMA_PORT;
else
port = NFS_PORT;
max_namelen = NFS4_MAXNAMLEN;
max_pathlen = NFS4_MAXPATHLEN;
nfs_validate_transport_protocol(ctx);
if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP)
goto out_invalid_transport_udp;
ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL |
NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK |
NFS_MOUNT_LOCAL_FCNTL);
} else {
goto out_v4_not_compiled;
}
} else {
nfs_set_mount_transport_protocol(ctx);
if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
@@ -1273,33 +1237,30 @@ static int nfs_fs_context_validate(struct fs_context *fc)
nfs_set_port(sap, &ctx->nfs_server.port, port);
ret = nfs_parse_devname(ctx, fc->source, max_namelen, max_pathlen);
ret = nfs_parse_source(fc, max_namelen, max_pathlen);
if (ret < 0)
return ret;
/* Load the NFS protocol module if we haven't done so yet */
if (!ctx->mount_info.nfs_mod) {
if (!ctx->nfs_mod) {
nfs_mod = get_nfs_version(ctx->version);
if (IS_ERR(nfs_mod)) {
ret = PTR_ERR(nfs_mod);
goto out_version_unavailable;
}
ctx->mount_info.nfs_mod = nfs_mod;
ctx->nfs_mod = nfs_mod;
}
return 0;
out_no_device_name:
dfprintk(MOUNT, "NFS: Device name not specified\n");
return -EINVAL;
#if !IS_ENABLED(CONFIG_NFS_V4)
out_v4_not_compiled:
dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
return -EPROTONOSUPPORT;
#else
out_invalid_transport_udp:
dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
return -EINVAL;
#endif /* !CONFIG_NFS_V4 */
out_no_address:
dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
return -EINVAL;
@@ -1332,7 +1293,7 @@ static int nfs_get_tree(struct fs_context *fc)
if (err)
return err;
if (!ctx->internal)
return ctx->mount_info.nfs_mod->rpc_ops->try_get_tree(fc);
return ctx->nfs_mod->rpc_ops->try_get_tree(fc);
else
return nfs_get_tree_common(fc);
}
@@ -1351,20 +1312,19 @@ static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
if (!ctx)
return -ENOMEM;
ctx->mount_info.mntfh = nfs_alloc_fhandle();
if (!ctx->mount_info.mntfh) {
ctx->mntfh = nfs_alloc_fhandle();
if (!ctx->mntfh) {
kfree(ctx);
return -ENOMEM;
}
nfs_copy_fh(ctx->mount_info.mntfh, src->mount_info.mntfh);
nfs_copy_fh(ctx->mntfh, src->mntfh);
__module_get(ctx->mount_info.nfs_mod->owner);
__module_get(ctx->nfs_mod->owner);
ctx->client_address = NULL;
ctx->mount_server.hostname = NULL;
ctx->nfs_server.export_path = NULL;
ctx->nfs_server.hostname = NULL;
ctx->fscache_uniq = NULL;
ctx->clone_data.addr = NULL;
ctx->clone_data.fattr = NULL;
fc->fs_private = ctx;
return 0;
@@ -1375,17 +1335,16 @@ static void nfs_fs_context_free(struct fs_context *fc)
struct nfs_fs_context *ctx = nfs_fc2context(fc);
if (ctx) {
if (ctx->mount_info.server)
nfs_free_server(ctx->mount_info.server);
if (ctx->mount_info.nfs_mod)
put_nfs_version(ctx->mount_info.nfs_mod);
if (ctx->server)
nfs_free_server(ctx->server);
if (ctx->nfs_mod)
put_nfs_version(ctx->nfs_mod);
kfree(ctx->client_address);
kfree(ctx->mount_server.hostname);
kfree(ctx->nfs_server.export_path);
kfree(ctx->nfs_server.hostname);
kfree(ctx->fscache_uniq);
nfs_free_fhandle(ctx->mount_info.mntfh);
kfree(ctx->clone_data.addr);
nfs_free_fhandle(ctx->mntfh);
nfs_free_fattr(ctx->clone_data.fattr);
kfree(ctx);
}
@@ -1413,9 +1372,8 @@ static int nfs_init_fs_context(struct fs_context *fc)
if (unlikely(!ctx))
return -ENOMEM;
ctx->mount_info.ctx = ctx;
ctx->mount_info.mntfh = nfs_alloc_fhandle();
if (unlikely(!ctx->mount_info.mntfh)) {
ctx->mntfh = nfs_alloc_fhandle();
if (unlikely(!ctx->mntfh)) {
kfree(ctx);
return -ENOMEM;
}
@@ -1452,8 +1410,8 @@ static int nfs_init_fs_context(struct fs_context *fc)
fc->net_ns = get_net(net);
}
ctx->mount_info.nfs_mod = nfss->nfs_client->cl_nfs_mod;
__module_get(ctx->mount_info.nfs_mod->owner);
ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod;
__module_get(ctx->nfs_mod->owner);
} else {
/* defaults */
ctx->timeo = NFS_UNSPEC_TIMEO;
@@ -1468,7 +1426,6 @@ static int nfs_init_fs_context(struct fs_context *fc)
ctx->minorversion = 0;
ctx->need_mount = true;
}
ctx->net = fc->net_ns;
fc->fs_private = ctx;
fc->ops = &nfs_fs_context_ops;
return 0;