diff options
author | Scott Mayhew <smayhew@redhat.com> | 2019-12-10 07:31:12 -0500 |
---|---|---|
committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-01-15 10:15:17 -0500 |
commit | e38bb238ed8ce280a217629294ba51dc217c5a2c (patch) | |
tree | 3460d0b129c76be0454b20d159f5b086405302aa | |
parent | 38465f5d1af932494d66b52d26bb3a02b837cdf8 (diff) | |
download | linux-e38bb238ed8ce280a217629294ba51dc217c5a2c.tar.bz2 |
NFS: Convert mount option parsing to use functionality from fs_parser.h
Split out from commit "NFS: Add fs_context support."
Convert existing mount option definitions to fs_parameter_enum's and
fs_parameter_spec's. Parse mount options using fs_parse() and
lookup_constant().
Notes:
1) Fixed a typo in the udp6 definition in nfs_xprt_protocol_tokens
from the original commit.
2) fs_parse() expects an fs_context as the first arg so that any
errors can be logged to the fs_context. We're passing NULL for the
fs_context (this will change in commit "NFS: Add fs_context support.")
which is okay as it will cause logfc() to do a printk() instead.
3) fs_parse() expects an fs_paramter as the third arg. We're
building an fs_parameter manually in nfs_fs_context_parse_option(),
which will go away in commit "NFS: Add fs_context support.".
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
-rw-r--r-- | fs/nfs/fs_context.c | 787 |
1 files changed, 364 insertions, 423 deletions
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index 44531443a92b..9a3162055d5d 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -11,7 +11,8 @@ #include <linux/module.h> #include <linux/fs.h> -#include <linux/parser.h> +#include <linux/fs_context.h> +#include <linux/fs_parser.h> #include <linux/nfs_fs.h> #include <linux/nfs_mount.h> #include <linux/nfs4_mount.h> @@ -28,218 +29,215 @@ #define NFS_MAX_CONNECTIONS 16 -enum { - /* Mount options that take no arguments */ - Opt_soft, Opt_softerr, Opt_hard, - Opt_posix, Opt_noposix, - Opt_cto, Opt_nocto, - Opt_ac, Opt_noac, - Opt_lock, Opt_nolock, - Opt_udp, Opt_tcp, Opt_rdma, - Opt_acl, Opt_noacl, - Opt_rdirplus, Opt_nordirplus, - Opt_sharecache, Opt_nosharecache, - Opt_resvport, Opt_noresvport, - Opt_fscache, Opt_nofscache, - Opt_migration, Opt_nomigration, - - /* Mount options that take integer arguments */ - Opt_port, - Opt_rsize, Opt_wsize, Opt_bsize, - Opt_timeo, Opt_retrans, - Opt_acregmin, Opt_acregmax, - Opt_acdirmin, Opt_acdirmax, +enum nfs_param { + Opt_ac, + Opt_acdirmax, + Opt_acdirmin, + Opt_acl, + Opt_acregmax, + Opt_acregmin, Opt_actimeo, - Opt_namelen, + Opt_addr, + Opt_bg, + Opt_bsize, + Opt_clientaddr, + Opt_cto, + Opt_fg, + Opt_fscache, + Opt_hard, + Opt_intr, + Opt_local_lock, + Opt_lock, + Opt_lookupcache, + Opt_migration, + Opt_minorversion, + Opt_mountaddr, + Opt_mounthost, Opt_mountport, + Opt_mountproto, Opt_mountvers, - Opt_minorversion, - - /* Mount options that take string arguments */ - Opt_nfsvers, - Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, - Opt_addr, Opt_mountaddr, Opt_clientaddr, + Opt_namelen, Opt_nconnect, - Opt_lookupcache, - Opt_fscache_uniq, - Opt_local_lock, - - /* Special mount options */ - Opt_userspace, Opt_deprecated, Opt_sloppy, - - Opt_err + Opt_port, + Opt_posix, + Opt_proto, + Opt_rdirplus, + Opt_rdma, + Opt_resvport, + Opt_retrans, + Opt_retry, + Opt_rsize, + Opt_sec, + Opt_sharecache, + Opt_sloppy, + Opt_soft, + Opt_softerr, + Opt_source, + Opt_tcp, + Opt_timeo, + Opt_udp, + Opt_v, + Opt_vers, + Opt_wsize, }; -static const match_table_t nfs_mount_option_tokens = { - { Opt_userspace, "bg" }, - { Opt_userspace, "fg" }, - { Opt_userspace, "retry=%s" }, - - { Opt_sloppy, "sloppy" }, - - { Opt_soft, "soft" }, - { Opt_softerr, "softerr" }, - { Opt_hard, "hard" }, - { Opt_deprecated, "intr" }, - { Opt_deprecated, "nointr" }, - { Opt_posix, "posix" }, - { Opt_noposix, "noposix" }, - { Opt_cto, "cto" }, - { Opt_nocto, "nocto" }, - { Opt_ac, "ac" }, - { Opt_noac, "noac" }, - { Opt_lock, "lock" }, - { Opt_nolock, "nolock" }, - { Opt_udp, "udp" }, - { Opt_tcp, "tcp" }, - { Opt_rdma, "rdma" }, - { Opt_acl, "acl" }, - { Opt_noacl, "noacl" }, - { Opt_rdirplus, "rdirplus" }, - { Opt_nordirplus, "nordirplus" }, - { Opt_sharecache, "sharecache" }, - { Opt_nosharecache, "nosharecache" }, - { Opt_resvport, "resvport" }, - { Opt_noresvport, "noresvport" }, - { Opt_fscache, "fsc" }, - { Opt_nofscache, "nofsc" }, - { Opt_migration, "migration" }, - { Opt_nomigration, "nomigration" }, - - { Opt_port, "port=%s" }, - { Opt_rsize, "rsize=%s" }, - { Opt_wsize, "wsize=%s" }, - { Opt_bsize, "bsize=%s" }, - { Opt_timeo, "timeo=%s" }, - { Opt_retrans, "retrans=%s" }, - { Opt_acregmin, "acregmin=%s" }, - { Opt_acregmax, "acregmax=%s" }, - { Opt_acdirmin, "acdirmin=%s" }, - { Opt_acdirmax, "acdirmax=%s" }, - { Opt_actimeo, "actimeo=%s" }, - { Opt_namelen, "namlen=%s" }, - { Opt_mountport, "mountport=%s" }, - { Opt_mountvers, "mountvers=%s" }, - { Opt_minorversion, "minorversion=%s" }, - - { Opt_nfsvers, "nfsvers=%s" }, - { Opt_nfsvers, "vers=%s" }, - - { Opt_sec, "sec=%s" }, - { Opt_proto, "proto=%s" }, - { Opt_mountproto, "mountproto=%s" }, - { Opt_addr, "addr=%s" }, - { Opt_clientaddr, "clientaddr=%s" }, - { Opt_mounthost, "mounthost=%s" }, - { Opt_mountaddr, "mountaddr=%s" }, - - { Opt_nconnect, "nconnect=%s" }, - - { Opt_lookupcache, "lookupcache=%s" }, - { Opt_fscache_uniq, "fsc=%s" }, - { Opt_local_lock, "local_lock=%s" }, - - /* The following needs to be listed after all other options */ - { Opt_nfsvers, "v%s" }, - - { Opt_err, NULL } +static const struct fs_parameter_spec nfs_param_specs[] = { + fsparam_flag_no("ac", Opt_ac), + fsparam_u32 ("acdirmax", Opt_acdirmax), + fsparam_u32 ("acdirmin", Opt_acdirmin), + fsparam_flag_no("acl", Opt_acl), + fsparam_u32 ("acregmax", Opt_acregmax), + fsparam_u32 ("acregmin", Opt_acregmin), + fsparam_u32 ("actimeo", Opt_actimeo), + fsparam_string("addr", Opt_addr), + fsparam_flag ("bg", Opt_bg), + fsparam_u32 ("bsize", Opt_bsize), + fsparam_string("clientaddr", Opt_clientaddr), + fsparam_flag_no("cto", Opt_cto), + fsparam_flag ("fg", Opt_fg), + __fsparam(fs_param_is_string, "fsc", Opt_fscache, + fs_param_neg_with_no|fs_param_v_optional), + fsparam_flag ("hard", Opt_hard), + __fsparam(fs_param_is_flag, "intr", Opt_intr, + fs_param_neg_with_no|fs_param_deprecated), + fsparam_enum ("local_lock", Opt_local_lock), + fsparam_flag_no("lock", Opt_lock), + fsparam_enum ("lookupcache", Opt_lookupcache), + fsparam_flag_no("migration", Opt_migration), + fsparam_u32 ("minorversion", Opt_minorversion), + fsparam_string("mountaddr", Opt_mountaddr), + fsparam_string("mounthost", Opt_mounthost), + fsparam_u32 ("mountport", Opt_mountport), + fsparam_string("mountproto", Opt_mountproto), + fsparam_u32 ("mountvers", Opt_mountvers), + fsparam_u32 ("namlen", Opt_namelen), + fsparam_u32 ("nconnect", Opt_nconnect), + fsparam_string("nfsvers", Opt_vers), + fsparam_u32 ("port", Opt_port), + fsparam_flag_no("posix", Opt_posix), + fsparam_string("proto", Opt_proto), + fsparam_flag_no("rdirplus", Opt_rdirplus), + fsparam_flag ("rdma", Opt_rdma), + fsparam_flag_no("resvport", Opt_resvport), + fsparam_u32 ("retrans", Opt_retrans), + fsparam_string("retry", Opt_retry), + fsparam_u32 ("rsize", Opt_rsize), + fsparam_string("sec", Opt_sec), + fsparam_flag_no("sharecache", Opt_sharecache), + fsparam_flag ("sloppy", Opt_sloppy), + fsparam_flag ("soft", Opt_soft), + fsparam_flag ("softerr", Opt_softerr), + fsparam_string("source", Opt_source), + fsparam_flag ("tcp", Opt_tcp), + fsparam_u32 ("timeo", Opt_timeo), + fsparam_flag ("udp", Opt_udp), + fsparam_flag ("v2", Opt_v), + fsparam_flag ("v3", Opt_v), + fsparam_flag ("v4", Opt_v), + fsparam_flag ("v4.0", Opt_v), + fsparam_flag ("v4.1", Opt_v), + fsparam_flag ("v4.2", Opt_v), + fsparam_string("vers", Opt_vers), + fsparam_u32 ("wsize", Opt_wsize), + {} }; enum { - Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, - Opt_xprt_rdma6, - - Opt_xprt_err -}; - -static const match_table_t nfs_xprt_protocol_tokens = { - { Opt_xprt_udp, "udp" }, - { Opt_xprt_udp6, "udp6" }, - { Opt_xprt_tcp, "tcp" }, - { Opt_xprt_tcp6, "tcp6" }, - { Opt_xprt_rdma, "rdma" }, - { Opt_xprt_rdma6, "rdma6" }, - - { Opt_xprt_err, NULL } + Opt_local_lock_all, + Opt_local_lock_flock, + Opt_local_lock_none, + Opt_local_lock_posix, }; enum { - Opt_sec_none, Opt_sec_sys, - Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, - Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp, - Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp, - - Opt_sec_err + Opt_lookupcache_all, + Opt_lookupcache_none, + Opt_lookupcache_positive, }; -static const match_table_t nfs_secflavor_tokens = { - { Opt_sec_none, "none" }, - { Opt_sec_none, "null" }, - { Opt_sec_sys, "sys" }, - - { Opt_sec_krb5, "krb5" }, - { Opt_sec_krb5i, "krb5i" }, - { Opt_sec_krb5p, "krb5p" }, - - { Opt_sec_lkey, "lkey" }, - { Opt_sec_lkeyi, "lkeyi" }, - { Opt_sec_lkeyp, "lkeyp" }, - - { Opt_sec_spkm, "spkm3" }, - { Opt_sec_spkmi, "spkm3i" }, - { Opt_sec_spkmp, "spkm3p" }, +static const struct fs_parameter_enum nfs_param_enums[] = { + { Opt_local_lock, "all", Opt_local_lock_all }, + { Opt_local_lock, "flock", Opt_local_lock_flock }, + { Opt_local_lock, "none", Opt_local_lock_none }, + { Opt_local_lock, "posix", Opt_local_lock_posix }, + { Opt_lookupcache, "all", Opt_lookupcache_all }, + { Opt_lookupcache, "none", Opt_lookupcache_none }, + { Opt_lookupcache, "pos", Opt_lookupcache_positive }, + { Opt_lookupcache, "positive", Opt_lookupcache_positive }, + {} +}; - { Opt_sec_err, NULL } +static const struct fs_parameter_description nfs_fs_parameters = { + .name = "nfs", + .specs = nfs_param_specs, + .enums = nfs_param_enums, }; enum { - Opt_lookupcache_all, Opt_lookupcache_positive, - Opt_lookupcache_none, - - Opt_lookupcache_err + Opt_vers_2, + Opt_vers_3, + Opt_vers_4, + Opt_vers_4_0, + Opt_vers_4_1, + Opt_vers_4_2, }; -static const match_table_t nfs_lookupcache_tokens = { - { Opt_lookupcache_all, "all" }, - { Opt_lookupcache_positive, "pos" }, - { Opt_lookupcache_positive, "positive" }, - { Opt_lookupcache_none, "none" }, - - { Opt_lookupcache_err, NULL } +static const struct constant_table nfs_vers_tokens[] = { + { "2", Opt_vers_2 }, + { "3", Opt_vers_3 }, + { "4", Opt_vers_4 }, + { "4.0", Opt_vers_4_0 }, + { "4.1", Opt_vers_4_1 }, + { "4.2", Opt_vers_4_2 }, }; enum { - Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix, - Opt_local_lock_none, - - Opt_local_lock_err + Opt_xprt_rdma, + Opt_xprt_rdma6, + Opt_xprt_tcp, + Opt_xprt_tcp6, + Opt_xprt_udp, + Opt_xprt_udp6, + nr__Opt_xprt }; -static const match_table_t nfs_local_lock_tokens = { - { Opt_local_lock_all, "all" }, - { Opt_local_lock_flock, "flock" }, - { Opt_local_lock_posix, "posix" }, - { Opt_local_lock_none, "none" }, - - { Opt_local_lock_err, NULL } +static const struct constant_table nfs_xprt_protocol_tokens[nr__Opt_xprt] = { + { "rdma", Opt_xprt_rdma }, + { "rdma6", Opt_xprt_rdma6 }, + { "tcp", Opt_xprt_tcp }, + { "tcp6", Opt_xprt_tcp6 }, + { "udp", Opt_xprt_udp }, + { "udp6", Opt_xprt_udp6 }, }; enum { - Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, - Opt_vers_4_1, Opt_vers_4_2, - - Opt_vers_err + Opt_sec_krb5, + Opt_sec_krb5i, + Opt_sec_krb5p, + Opt_sec_lkey, + Opt_sec_lkeyi, + Opt_sec_lkeyp, + Opt_sec_none, + Opt_sec_spkm, + Opt_sec_spkmi, + Opt_sec_spkmp, + Opt_sec_sys, + nr__Opt_sec }; -static const match_table_t nfs_vers_tokens = { - { Opt_vers_2, "2" }, - { Opt_vers_3, "3" }, - { Opt_vers_4, "4" }, - { Opt_vers_4_0, "4.0" }, - { Opt_vers_4_1, "4.1" }, - { Opt_vers_4_2, "4.2" }, - - { Opt_vers_err, NULL } +static const struct constant_table nfs_secflavor_tokens[] = { + { "krb5", Opt_sec_krb5 }, + { "krb5i", Opt_sec_krb5i }, + { "krb5p", Opt_sec_krb5p }, + { "lkey", Opt_sec_lkey }, + { "lkeyi", Opt_sec_lkeyi }, + { "lkeyp", Opt_sec_lkeyp }, + { "none", Opt_sec_none }, + { "null", Opt_sec_none }, + { "spkm3", Opt_sec_spkm }, + { "spkm3i", Opt_sec_spkmi }, + { "spkm3p", Opt_sec_spkmp }, + { "sys", Opt_sec_sys }, }; struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) @@ -368,17 +366,19 @@ 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, char *value) +static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, + struct fs_parameter *param) { - substring_t args[MAX_OPT_ARGS]; rpc_authflavor_t pseudoflavor; - char *p; + char *string = param->string, *p; int ret; - dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); + dfprintk(MOUNT, "NFS: parsing %s=%s option\n", param->key, param->string); - while ((p = strsep(&value, ":")) != NULL) { - switch (match_token(p, nfs_secflavor_tokens, args)) { + while ((p = strsep(&string, ":")) != NULL) { + if (!*p) + continue; + switch (lookup_constant(nfs_secflavor_tokens, p, -1)) { case Opt_sec_none: pseudoflavor = RPC_AUTH_NULL; break; @@ -427,11 +427,10 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, char *value) } static int nfs_parse_version_string(struct nfs_fs_context *ctx, - char *string, - substring_t *args) + const char *string) { ctx->flags &= ~NFS_MOUNT_VER3; - switch (match_token(string, nfs_vers_tokens, args)) { + switch (lookup_constant(nfs_vers_tokens, string, -1)) { case Opt_vers_2: ctx->version = 2; break; @@ -465,64 +464,24 @@ static int nfs_parse_version_string(struct nfs_fs_context *ctx, return 0; } -static int nfs_get_option_str(substring_t args[], char **option) -{ - kfree(*option); - *option = match_strdup(args); - return !*option; -} - -static int nfs_get_option_ui(struct nfs_fs_context *ctx, - substring_t args[], unsigned int *option) -{ - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - return kstrtouint(ctx->buf, 10, option); -} - -static int nfs_get_option_ui_bound(struct nfs_fs_context *ctx, - substring_t args[], unsigned int *option, - unsigned int l_bound, unsigned u_bound) -{ - int ret; - - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - ret = kstrtouint(ctx->buf, 10, option); - if (ret < 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - -static int nfs_get_option_us_bound(struct nfs_fs_context *ctx, - substring_t args[], unsigned short *option, - unsigned short l_bound, - unsigned short u_bound) -{ - int ret; - - match_strlcpy(ctx->buf, args, sizeof(ctx->buf)); - ret = kstrtou16(ctx->buf, 10, option); - if (ret < 0) - return ret; - if (*option < l_bound || *option > u_bound) - return -ERANGE; - return 0; -} - /* - * Parse a single mount option in "key[=val]" form. + * Parse a single mount parameter. */ -static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) +static int nfs_fs_context_parse_param(struct nfs_fs_context *ctx, + struct fs_parameter *param) { - substring_t args[MAX_OPT_ARGS]; - char *string; - int token, ret; + struct fs_parse_result result; + unsigned short protofamily, mountfamily; + unsigned int len; + int ret, opt; + + dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); - dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p); + opt = fs_parse(NULL, &nfs_fs_parameters, param, &result); + if (opt < 0) + return ctx->sloppy ? 1 : opt; - token = match_token(p, nfs_mount_option_tokens, args); - switch (token) { + switch (opt) { /* * boolean options: foo/nofoo */ @@ -538,30 +497,31 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR); break; case Opt_posix: - ctx->flags |= NFS_MOUNT_POSIX; - break; - case Opt_noposix: - ctx->flags &= ~NFS_MOUNT_POSIX; + if (result.negated) + ctx->flags &= ~NFS_MOUNT_POSIX; + else + ctx->flags |= NFS_MOUNT_POSIX; break; case Opt_cto: - ctx->flags &= ~NFS_MOUNT_NOCTO; - break; - case Opt_nocto: - ctx->flags |= NFS_MOUNT_NOCTO; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOCTO; + else + ctx->flags &= ~NFS_MOUNT_NOCTO; break; case Opt_ac: - ctx->flags &= ~NFS_MOUNT_NOAC; - break; - case Opt_noac: - ctx->flags |= NFS_MOUNT_NOAC; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOAC; + else + ctx->flags &= ~NFS_MOUNT_NOAC; break; case Opt_lock: - ctx->flags &= ~NFS_MOUNT_NONLM; - ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); - break; - case Opt_nolock: - ctx->flags |= NFS_MOUNT_NONLM; - ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + if (result.negated) { + ctx->flags |= NFS_MOUNT_NONLM; + ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + } else { + ctx->flags &= ~NFS_MOUNT_NONLM; + ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); + } break; case Opt_udp: ctx->flags &= ~NFS_MOUNT_TCP; @@ -574,195 +534,177 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) case Opt_rdma: ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(p); + xprt_load_transport(param->key); break; case Opt_acl: - ctx->flags &= ~NFS_MOUNT_NOACL; - break; - case Opt_noacl: - ctx->flags |= NFS_MOUNT_NOACL; + if (result.negated) + ctx->flags |= NFS_MOUNT_NOACL; + else + ctx->flags &= ~NFS_MOUNT_NOACL; break; case Opt_rdirplus: - ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; - break; - case Opt_nordirplus: - ctx->flags |= NFS_MOUNT_NORDIRPLUS; + if (result.negated) + ctx->flags |= NFS_MOUNT_NORDIRPLUS; + else + ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; break; case Opt_sharecache: - ctx->flags &= ~NFS_MOUNT_UNSHARED; - break; - case Opt_nosharecache: - ctx->flags |= NFS_MOUNT_UNSHARED; + if (result.negated) + ctx->flags |= NFS_MOUNT_UNSHARED; + else + ctx->flags &= ~NFS_MOUNT_UNSHARED; break; case Opt_resvport: - ctx->flags &= ~NFS_MOUNT_NORESVPORT; - break; - case Opt_noresvport: - ctx->flags |= NFS_MOUNT_NORESVPORT; + if (result.negated) + ctx->flags |= NFS_MOUNT_NORESVPORT; + else + ctx->flags &= ~NFS_MOUNT_NORESVPORT; break; case Opt_fscache: - ctx->options |= NFS_OPTION_FSCACHE; kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; - break; - case Opt_nofscache: - ctx->options &= ~NFS_OPTION_FSCACHE; - kfree(ctx->fscache_uniq); - ctx->fscache_uniq = NULL; + ctx->fscache_uniq = param->string; + param->string = NULL; + if (result.negated) + ctx->options &= ~NFS_OPTION_FSCACHE; + else + ctx->options |= NFS_OPTION_FSCACHE; break; case Opt_migration: - ctx->options |= NFS_OPTION_MIGRATION; - break; - case Opt_nomigration: - ctx->options &= ~NFS_OPTION_MIGRATION; + if (result.negated) + ctx->options &= ~NFS_OPTION_MIGRATION; + else + ctx->options |= NFS_OPTION_MIGRATION; break; /* * options that take numeric values */ case Opt_port: - if (nfs_get_option_ui_bound(ctx, args, &ctx->nfs_server.port, - 0, USHRT_MAX)) - goto out_invalid_value; + if (result.uint_32 > USHRT_MAX) + goto out_of_bounds; + ctx->nfs_server.port = result.uint_32; break; case Opt_rsize: - if (nfs_get_option_ui(ctx, args, &ctx->rsize)) - goto out_invalid_value; + ctx->rsize = result.uint_32; break; case Opt_wsize: - if (nfs_get_option_ui(ctx, args, &ctx->wsize)) - goto out_invalid_value; + ctx->wsize = result.uint_32; break; case Opt_bsize: - if (nfs_get_option_ui(ctx, args, &ctx->bsize)) - goto out_invalid_value; + ctx->bsize = result.uint_32; break; case Opt_timeo: - if (nfs_get_option_ui_bound(ctx, args, &ctx->timeo, 1, INT_MAX)) - goto out_invalid_value; + if (result.uint_32 < 1 || result.uint_32 > INT_MAX) + goto out_of_bounds; + ctx->timeo = result.uint_32; break; case Opt_retrans: - if (nfs_get_option_ui_bound(ctx, args, &ctx->retrans, 0, INT_MAX)) - goto out_invalid_value; + if (result.uint_32 > INT_MAX) + goto out_of_bounds; + ctx->retrans = result.uint_32; break; case Opt_acregmin: - if (nfs_get_option_ui(ctx, args, &ctx->acregmin)) - goto out_invalid_value; + ctx->acregmin = result.uint_32; break; case Opt_acregmax: - if (nfs_get_option_ui(ctx, args, &ctx->acregmax)) - goto out_invalid_value; + ctx->acregmax = result.uint_32; break; case Opt_acdirmin: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmin)) - goto out_invalid_value; + ctx->acdirmin = result.uint_32; break; case Opt_acdirmax: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) - goto out_invalid_value; + ctx->acdirmax = result.uint_32; break; case Opt_actimeo: - if (nfs_get_option_ui(ctx, args, &ctx->acdirmax)) - goto out_invalid_value; - ctx->acregmin = ctx->acregmax = - ctx->acdirmin = ctx->acdirmax; + ctx->acregmin = result.uint_32; + ctx->acregmax = result.uint_32; + ctx->acdirmin = result.uint_32; + ctx->acdirmax = result.uint_32; break; case Opt_namelen: - if (nfs_get_option_ui(ctx, args, &ctx->namlen)) - goto out_invalid_value; + ctx->namlen = result.uint_32; break; case Opt_mountport: - if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.port, - 0, USHRT_MAX)) - goto out_invalid_value; + if (result.uint_32 > USHRT_MAX) + goto out_of_bounds; + ctx->mount_server.port = result.uint_32; break; case Opt_mountvers: - if (nfs_get_option_ui_bound(ctx, args, &ctx->mount_server.version, - NFS_MNT_VERSION, NFS_MNT3_VERSION)) - goto out_invalid_value; + if (result.uint_32 < NFS_MNT_VERSION || + result.uint_32 > NFS_MNT3_VERSION) + goto out_of_bounds; + ctx->mount_server.version = result.uint_32; break; case Opt_minorversion: - if (nfs_get_option_ui_bound(ctx, args, &ctx->minorversion, - 0, NFS4_MAX_MINOR_VERSION)) - goto out_invalid_value; + if (result.uint_32 > NFS4_MAX_MINOR_VERSION) + goto out_of_bounds; + ctx->minorversion = result.uint_32; break; /* * options that take text values */ - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ret = nfs_parse_version_string(ctx, string, args); - kfree(string); + case Opt_v: + ret = nfs_parse_version_string(ctx, param->key + 1); + if (ret < 0) + return ret; + break; + case Opt_vers: + ret = nfs_parse_version_string(ctx, param->string); if (ret < 0) return ret; break; case Opt_sec: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ret = nfs_parse_security_flavors(ctx, string); - kfree(string); + ret = nfs_parse_security_flavors(ctx, param); if (ret < 0) return ret; break; - case Opt_proto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_xprt_protocol_tokens, args); - ctx->protofamily = AF_INET; - switch (token) { + case Opt_proto: + protofamily = AF_INET; + switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { case Opt_xprt_udp6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->flags &= ~NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; break; case Opt_xprt_rdma6: - ctx->protofamily = AF_INET6; + protofamily = AF_INET6; /* fall through */ case Opt_xprt_rdma: /* vector side protocols to TCP */ ctx->flags |= NFS_MOUNT_TCP; ctx->nfs_server.protocol = XPRT_TRANSPORT_RDMA; - xprt_load_transport(string); + xprt_load_transport(param->string); break; default: - kfree(string); dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } - kfree(string); + + ctx->protofamily = protofamily; break; - case Opt_mountproto: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_xprt_protocol_tokens, args); - kfree(string); - ctx->mountfamily = AF_INET; - switch (token) { + case Opt_mountproto: + mountfamily = AF_INET; + switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { case Opt_xprt_udp6: - ctx->mountfamily = AF_INET6; + mountfamily = AF_INET6; /* fall through */ case Opt_xprt_udp: ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; break; case Opt_xprt_tcp6: - ctx->mountfamily = AF_INET6; + mountfamily = AF_INET6; /* fall through */ case Opt_xprt_tcp: ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; @@ -772,51 +714,42 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) dfprintk(MOUNT, "NFS: unrecognized transport protocol\n"); return -EINVAL; } + ctx->mountfamily = mountfamily; break; + case Opt_addr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->nfs_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - &ctx->nfs_server.address, - sizeof(ctx->nfs_server._address)); - kfree(string); - if (ctx->nfs_server.addrlen == 0) + len = rpc_pton(ctx->net, param->string, param->size, + &ctx->nfs_server.address, + sizeof(ctx->nfs_server._address)); + if (len == 0) goto out_invalid_address; + ctx->nfs_server.addrlen = len; break; case Opt_clientaddr: - if (nfs_get_option_str(args, &ctx->client_address)) - goto out_nomem; + kfree(ctx->client_address); + ctx->client_address = param->string; + param->string = NULL; break; case Opt_mounthost: - if (nfs_get_option_str(args, &ctx->mount_server.hostname)) - goto out_nomem; + kfree(ctx->mount_server.hostname); + ctx->mount_server.hostname = param->string; + param->string = NULL; break; case Opt_mountaddr: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - ctx->mount_server.addrlen = - rpc_pton(ctx->net, string, strlen(string), - &ctx->mount_server.address, - sizeof(ctx->mount_server._address)); - kfree(string); - if (ctx->mount_server.addrlen == 0) + len = rpc_pton(ctx->net, param->string, param->size, + &ctx->mount_server.address, + sizeof(ctx->mount_server._address)); + if (len == 0) goto out_invalid_address; + ctx->mount_server.addrlen = len; break; case Opt_nconnect: - if (nfs_get_option_us_bound(ctx, args, &ctx->nfs_server.nconnect, - 1, NFS_MAX_CONNECTIONS)) - goto out_invalid_value; + if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_CONNECTIONS) + goto out_of_bounds; + ctx->nfs_server.nconnect = result.uint_32; break; case Opt_lookupcache: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_lookupcache_tokens, args); - kfree(string); - switch (token) { + switch (result.uint_32) { case Opt_lookupcache_all: ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); break; @@ -828,22 +761,11 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; break; default: - dfprintk(MOUNT, "NFS: invalid lookupcache argument\n"); - return -EINVAL; + goto out_invalid_value; } break; - case Opt_fscache_uniq: - if (nfs_get_option_str(args, &ctx->fscache_uniq)) - goto out_nomem; - ctx->options |= NFS_OPTION_FSCACHE; - break; case Opt_local_lock: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - token = match_token(string, nfs_local_lock_tokens, args); - kfree(string); - switch (token) { + switch (result.uint_32) { case Opt_local_lock_all: ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); @@ -859,8 +781,7 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) NFS_MOUNT_LOCAL_FCNTL); break; default: - dfprintk(MOUNT, "NFS: invalid local_lock argument\n"); - return -EINVAL; + goto out_invalid_value; } break; @@ -868,30 +789,50 @@ static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) * Special options */ case Opt_sloppy: - ctx->sloppy = 1; + ctx->sloppy = true; dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); break; - case Opt_userspace: - case Opt_deprecated: - dfprintk(MOUNT, "NFS: ignoring mount option '%s'\n", p); - break; - - default: - dfprintk(MOUNT, "NFS: unrecognized mount option '%s'\n", p); - return -EINVAL; } return 0; -out_invalid_address: - printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); - return -EINVAL; out_invalid_value: - printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); + printk(KERN_INFO "NFS: Bad mount option value specified\n"); return -EINVAL; -out_nomem: - printk(KERN_INFO "NFS: not enough memory to parse option\n"); - return -ENOMEM; +out_invalid_address: + printk(KERN_INFO "NFS: Bad IP address specified\n"); + return -EINVAL; +out_of_bounds: + printk(KERN_INFO "NFS: Value for '%s' out of range\n", param->key); + return -ERANGE; +} + +/* cribbed from generic_parse_monolithic and vfs_parse_fs_string */ +static int nfs_fs_context_parse_option(struct nfs_fs_context *ctx, char *p) +{ + int ret; + char *key = p, *value; + size_t v_size = 0; + struct fs_parameter param; + + memset(¶m, 0, sizeof(param)); + value = strchr(key, '='); + if (value && value != key) { + *value++ = 0; + v_size = strlen(value); + } + param.key = key; + param.type = fs_value_is_flag; + param.size = v_size; + if (v_size > 0) { + param.type = fs_value_is_string; + param.string = kmemdup_nul(value, v_size, GFP_KERNEL); + if (!param.string) + return -ENOMEM; + } + ret = nfs_fs_context_parse_param(ctx, ¶m); + kfree(param.string); + return ret; } /* |