diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/mount_clnt.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfs/mount_clnt.c | 518 |
1 files changed, 0 insertions, 518 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/mount_clnt.c b/ANDROID_3.4.5/fs/nfs/mount_clnt.c deleted file mode 100644 index 8e65c7f1..00000000 --- a/ANDROID_3.4.5/fs/nfs/mount_clnt.c +++ /dev/null @@ -1,518 +0,0 @@ -/* - * In-kernel MOUNT protocol client - * - * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de> - */ - -#include <linux/types.h> -#include <linux/socket.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/uio.h> -#include <linux/net.h> -#include <linux/in.h> -#include <linux/sunrpc/clnt.h> -#include <linux/sunrpc/sched.h> -#include <linux/nfs_fs.h> -#include "internal.h" - -#ifdef NFS_DEBUG -# define NFSDBG_FACILITY NFSDBG_MOUNT -#endif - -/* - * Defined by RFC 1094, section A.3; and RFC 1813, section 5.1.4 - */ -#define MNTPATHLEN (1024) - -/* - * XDR data type sizes - */ -#define encode_dirpath_sz (1 + XDR_QUADLEN(MNTPATHLEN)) -#define MNT_status_sz (1) -#define MNT_fhs_status_sz (1) -#define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE) -#define MNT_fhandle3_sz (1 + XDR_QUADLEN(NFS3_FHSIZE)) -#define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS) - -/* - * XDR argument and result sizes - */ -#define MNT_enc_dirpath_sz encode_dirpath_sz -#define MNT_dec_mountres_sz (MNT_status_sz + MNT_fhandle_sz) -#define MNT_dec_mountres3_sz (MNT_status_sz + MNT_fhandle_sz + \ - MNT_authflav3_sz) - -/* - * Defined by RFC 1094, section A.5 - */ -enum { - MOUNTPROC_NULL = 0, - MOUNTPROC_MNT = 1, - MOUNTPROC_DUMP = 2, - MOUNTPROC_UMNT = 3, - MOUNTPROC_UMNTALL = 4, - MOUNTPROC_EXPORT = 5, -}; - -/* - * Defined by RFC 1813, section 5.2 - */ -enum { - MOUNTPROC3_NULL = 0, - MOUNTPROC3_MNT = 1, - MOUNTPROC3_DUMP = 2, - MOUNTPROC3_UMNT = 3, - MOUNTPROC3_UMNTALL = 4, - MOUNTPROC3_EXPORT = 5, -}; - -static const struct rpc_program mnt_program; - -/* - * Defined by OpenGroup XNFS Version 3W, chapter 8 - */ -enum mountstat { - MNT_OK = 0, - MNT_EPERM = 1, - MNT_ENOENT = 2, - MNT_EACCES = 13, - MNT_EINVAL = 22, -}; - -static struct { - u32 status; - int errno; -} mnt_errtbl[] = { - { .status = MNT_OK, .errno = 0, }, - { .status = MNT_EPERM, .errno = -EPERM, }, - { .status = MNT_ENOENT, .errno = -ENOENT, }, - { .status = MNT_EACCES, .errno = -EACCES, }, - { .status = MNT_EINVAL, .errno = -EINVAL, }, -}; - -/* - * Defined by RFC 1813, section 5.1.5 - */ -enum mountstat3 { - MNT3_OK = 0, /* no error */ - MNT3ERR_PERM = 1, /* Not owner */ - MNT3ERR_NOENT = 2, /* No such file or directory */ - MNT3ERR_IO = 5, /* I/O error */ - MNT3ERR_ACCES = 13, /* Permission denied */ - MNT3ERR_NOTDIR = 20, /* Not a directory */ - MNT3ERR_INVAL = 22, /* Invalid argument */ - MNT3ERR_NAMETOOLONG = 63, /* Filename too long */ - MNT3ERR_NOTSUPP = 10004, /* Operation not supported */ - MNT3ERR_SERVERFAULT = 10006, /* A failure on the server */ -}; - -static struct { - u32 status; - int errno; -} mnt3_errtbl[] = { - { .status = MNT3_OK, .errno = 0, }, - { .status = MNT3ERR_PERM, .errno = -EPERM, }, - { .status = MNT3ERR_NOENT, .errno = -ENOENT, }, - { .status = MNT3ERR_IO, .errno = -EIO, }, - { .status = MNT3ERR_ACCES, .errno = -EACCES, }, - { .status = MNT3ERR_NOTDIR, .errno = -ENOTDIR, }, - { .status = MNT3ERR_INVAL, .errno = -EINVAL, }, - { .status = MNT3ERR_NAMETOOLONG, .errno = -ENAMETOOLONG, }, - { .status = MNT3ERR_NOTSUPP, .errno = -ENOTSUPP, }, - { .status = MNT3ERR_SERVERFAULT, .errno = -EREMOTEIO, }, -}; - -struct mountres { - int errno; - struct nfs_fh *fh; - unsigned int *auth_count; - rpc_authflavor_t *auth_flavors; -}; - -struct mnt_fhstatus { - u32 status; - struct nfs_fh *fh; -}; - -/** - * nfs_mount - Obtain an NFS file handle for the given host and path - * @info: pointer to mount request arguments - * - * Uses default timeout parameters specified by underlying transport. - */ -int nfs_mount(struct nfs_mount_request *info) -{ - struct mountres result = { - .fh = info->fh, - .auth_count = info->auth_flav_len, - .auth_flavors = info->auth_flavs, - }; - struct rpc_message msg = { - .rpc_argp = info->dirpath, - .rpc_resp = &result, - }; - struct rpc_create_args args = { - .net = info->net, - .protocol = info->protocol, - .address = info->sap, - .addrsize = info->salen, - .servername = info->hostname, - .program = &mnt_program, - .version = info->version, - .authflavor = RPC_AUTH_UNIX, - }; - struct rpc_clnt *mnt_clnt; - int status; - - dprintk("NFS: sending MNT request for %s:%s\n", - (info->hostname ? info->hostname : "server"), - info->dirpath); - - if (info->noresvport) - args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; - - mnt_clnt = rpc_create(&args); - if (IS_ERR(mnt_clnt)) - goto out_clnt_err; - - if (info->version == NFS_MNT3_VERSION) - msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT]; - else - msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT]; - - status = rpc_call_sync(mnt_clnt, &msg, 0); - rpc_shutdown_client(mnt_clnt); - - if (status < 0) - goto out_call_err; - if (result.errno != 0) - goto out_mnt_err; - - dprintk("NFS: MNT request succeeded\n"); - status = 0; - -out: - return status; - -out_clnt_err: - status = PTR_ERR(mnt_clnt); - dprintk("NFS: failed to create MNT RPC client, status=%d\n", status); - goto out; - -out_call_err: - dprintk("NFS: MNT request failed, status=%d\n", status); - goto out; - -out_mnt_err: - dprintk("NFS: MNT server returned result %d\n", result.errno); - status = result.errno; - goto out; -} - -/** - * nfs_umount - Notify a server that we have unmounted this export - * @info: pointer to umount request arguments - * - * MOUNTPROC_UMNT is advisory, so we set a short timeout, and always - * use UDP. - */ -void nfs_umount(const struct nfs_mount_request *info) -{ - static const struct rpc_timeout nfs_umnt_timeout = { - .to_initval = 1 * HZ, - .to_maxval = 3 * HZ, - .to_retries = 2, - }; - struct rpc_create_args args = { - .net = info->net, - .protocol = IPPROTO_UDP, - .address = info->sap, - .addrsize = info->salen, - .timeout = &nfs_umnt_timeout, - .servername = info->hostname, - .program = &mnt_program, - .version = info->version, - .authflavor = RPC_AUTH_UNIX, - .flags = RPC_CLNT_CREATE_NOPING, - }; - struct rpc_message msg = { - .rpc_argp = info->dirpath, - }; - struct rpc_clnt *clnt; - int status; - - if (info->noresvport) - args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; - - clnt = rpc_create(&args); - if (IS_ERR(clnt)) - goto out_clnt_err; - - dprintk("NFS: sending UMNT request for %s:%s\n", - (info->hostname ? info->hostname : "server"), info->dirpath); - - if (info->version == NFS_MNT3_VERSION) - msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC3_UMNT]; - else - msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC_UMNT]; - - status = rpc_call_sync(clnt, &msg, 0); - rpc_shutdown_client(clnt); - - if (unlikely(status < 0)) - goto out_call_err; - - return; - -out_clnt_err: - dprintk("NFS: failed to create UMNT RPC client, status=%ld\n", - PTR_ERR(clnt)); - return; - -out_call_err: - dprintk("NFS: UMNT request failed, status=%d\n", status); -} - -/* - * XDR encode/decode functions for MOUNT - */ - -static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) -{ - const u32 pathname_len = strlen(pathname); - __be32 *p; - - BUG_ON(pathname_len > MNTPATHLEN); - p = xdr_reserve_space(xdr, 4 + pathname_len); - xdr_encode_opaque(p, pathname, pathname_len); -} - -static void mnt_xdr_enc_dirpath(struct rpc_rqst *req, struct xdr_stream *xdr, - const char *dirpath) -{ - encode_mntdirpath(xdr, dirpath); -} - -/* - * RFC 1094: "A non-zero status indicates some sort of error. In this - * case, the status is a UNIX error number." This can be problematic - * if the server and client use different errno values for the same - * error. - * - * However, the OpenGroup XNFS spec provides a simple mapping that is - * independent of local errno values on the server and the client. - */ -static int decode_status(struct xdr_stream *xdr, struct mountres *res) -{ - unsigned int i; - u32 status; - __be32 *p; - - p = xdr_inline_decode(xdr, 4); - if (unlikely(p == NULL)) - return -EIO; - status = be32_to_cpup(p); - - for (i = 0; i < ARRAY_SIZE(mnt_errtbl); i++) { - if (mnt_errtbl[i].status == status) { - res->errno = mnt_errtbl[i].errno; - return 0; - } - } - - dprintk("NFS: unrecognized MNT status code: %u\n", status); - res->errno = -EACCES; - return 0; -} - -static int decode_fhandle(struct xdr_stream *xdr, struct mountres *res) -{ - struct nfs_fh *fh = res->fh; - __be32 *p; - - p = xdr_inline_decode(xdr, NFS2_FHSIZE); - if (unlikely(p == NULL)) - return -EIO; - - fh->size = NFS2_FHSIZE; - memcpy(fh->data, p, NFS2_FHSIZE); - return 0; -} - -static int mnt_xdr_dec_mountres(struct rpc_rqst *req, - struct xdr_stream *xdr, - struct mountres *res) -{ - int status; - - status = decode_status(xdr, res); - if (unlikely(status != 0 || res->errno != 0)) - return status; - return decode_fhandle(xdr, res); -} - -static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res) -{ - unsigned int i; - u32 status; - __be32 *p; - - p = xdr_inline_decode(xdr, 4); - if (unlikely(p == NULL)) - return -EIO; - status = be32_to_cpup(p); - - for (i = 0; i < ARRAY_SIZE(mnt3_errtbl); i++) { - if (mnt3_errtbl[i].status == status) { - res->errno = mnt3_errtbl[i].errno; - return 0; - } - } - - dprintk("NFS: unrecognized MNT3 status code: %u\n", status); - res->errno = -EACCES; - return 0; -} - -static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res) -{ - struct nfs_fh *fh = res->fh; - u32 size; - __be32 *p; - - p = xdr_inline_decode(xdr, 4); - if (unlikely(p == NULL)) - return -EIO; - - size = be32_to_cpup(p); - if (size > NFS3_FHSIZE || size == 0) - return -EIO; - - p = xdr_inline_decode(xdr, size); - if (unlikely(p == NULL)) - return -EIO; - - fh->size = size; - memcpy(fh->data, p, size); - return 0; -} - -static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) -{ - rpc_authflavor_t *flavors = res->auth_flavors; - unsigned int *count = res->auth_count; - u32 entries, i; - __be32 *p; - - if (*count == 0) - return 0; - - p = xdr_inline_decode(xdr, 4); - if (unlikely(p == NULL)) - return -EIO; - entries = be32_to_cpup(p); - dprintk("NFS: received %u auth flavors\n", entries); - if (entries > NFS_MAX_SECFLAVORS) - entries = NFS_MAX_SECFLAVORS; - - p = xdr_inline_decode(xdr, 4 * entries); - if (unlikely(p == NULL)) - return -EIO; - - if (entries > *count) - entries = *count; - - for (i = 0; i < entries; i++) { - flavors[i] = be32_to_cpup(p++); - dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]); - } - *count = i; - - return 0; -} - -static int mnt_xdr_dec_mountres3(struct rpc_rqst *req, - struct xdr_stream *xdr, - struct mountres *res) -{ - int status; - - status = decode_fhs_status(xdr, res); - if (unlikely(status != 0 || res->errno != 0)) - return status; - status = decode_fhandle3(xdr, res); - if (unlikely(status != 0)) { - res->errno = -EBADHANDLE; - return 0; - } - return decode_auth_flavors(xdr, res); -} - -static struct rpc_procinfo mnt_procedures[] = { - [MOUNTPROC_MNT] = { - .p_proc = MOUNTPROC_MNT, - .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, - .p_decode = (kxdrdproc_t)mnt_xdr_dec_mountres, - .p_arglen = MNT_enc_dirpath_sz, - .p_replen = MNT_dec_mountres_sz, - .p_statidx = MOUNTPROC_MNT, - .p_name = "MOUNT", - }, - [MOUNTPROC_UMNT] = { - .p_proc = MOUNTPROC_UMNT, - .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, - .p_arglen = MNT_enc_dirpath_sz, - .p_statidx = MOUNTPROC_UMNT, - .p_name = "UMOUNT", - }, -}; - -static struct rpc_procinfo mnt3_procedures[] = { - [MOUNTPROC3_MNT] = { - .p_proc = MOUNTPROC3_MNT, - .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, - .p_decode = (kxdrdproc_t)mnt_xdr_dec_mountres3, - .p_arglen = MNT_enc_dirpath_sz, - .p_replen = MNT_dec_mountres3_sz, - .p_statidx = MOUNTPROC3_MNT, - .p_name = "MOUNT", - }, - [MOUNTPROC3_UMNT] = { - .p_proc = MOUNTPROC3_UMNT, - .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, - .p_arglen = MNT_enc_dirpath_sz, - .p_statidx = MOUNTPROC3_UMNT, - .p_name = "UMOUNT", - }, -}; - - -static const struct rpc_version mnt_version1 = { - .number = 1, - .nrprocs = ARRAY_SIZE(mnt_procedures), - .procs = mnt_procedures, -}; - -static const struct rpc_version mnt_version3 = { - .number = 3, - .nrprocs = ARRAY_SIZE(mnt3_procedures), - .procs = mnt3_procedures, -}; - -static const struct rpc_version *mnt_version[] = { - NULL, - &mnt_version1, - NULL, - &mnt_version3, -}; - -static struct rpc_stat mnt_stats; - -static const struct rpc_program mnt_program = { - .name = "mount", - .number = NFS_MNT_PROGRAM, - .nrvers = ARRAY_SIZE(mnt_version), - .version = mnt_version, - .stats = &mnt_stats, -}; |