From 97fc8b1ebf6a0fe4bb9c71a8e91a822c22c09bc5 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 29 Jan 2013 17:07:42 -0800 Subject: 9p: Add 'u' and 'g' format specifies for kuids and kgids This allows concentrating all of the conversion to and from kuids and kgids into the format needed by the 9p protocol into one location. Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: "Eric W. Biederman" --- net/9p/protocol.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'net/9p') diff --git a/net/9p/protocol.c b/net/9p/protocol.c index 3d33ecf1332..c289c6cee98 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -85,6 +85,8 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size) d - int32_t q - int64_t s - string + u - numeric uid + g - numeric gid S - stat Q - qid D - data blob (int32_t size followed by void *, results are not freed) @@ -163,6 +165,26 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt, (*sptr)[len] = 0; } break; + case 'u': { + kuid_t *uid = va_arg(ap, kuid_t *); + __le32 le_val; + if (pdu_read(pdu, &le_val, sizeof(le_val))) { + errcode = -EFAULT; + break; + } + *uid = make_kuid(&init_user_ns, + le32_to_cpu(le_val)); + } break; + case 'g': { + kgid_t *gid = va_arg(ap, kgid_t *); + __le32 le_val; + if (pdu_read(pdu, &le_val, sizeof(le_val))) { + errcode = -EFAULT; + break; + } + *gid = make_kgid(&init_user_ns, + le32_to_cpu(le_val)); + } break; case 'Q':{ struct p9_qid *qid = va_arg(ap, struct p9_qid *); @@ -377,6 +399,20 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, errcode = -EFAULT; } break; + case 'u': { + kuid_t uid = va_arg(ap, kuid_t); + __le32 val = cpu_to_le32( + from_kuid(&init_user_ns, uid)); + if (pdu_write(pdu, &val, sizeof(val))) + errcode = -EFAULT; + } break; + case 'g': { + kgid_t gid = va_arg(ap, kgid_t); + __le32 val = cpu_to_le32( + from_kgid(&init_user_ns, gid)); + if (pdu_write(pdu, &val, sizeof(val))) + errcode = -EFAULT; + } break; case 'Q':{ const struct p9_qid *qid = va_arg(ap, const struct p9_qid *); -- cgit v1.2.3-70-g09d2 From f791f7c5e354870eaa5e31c4038c6723683283f1 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 29 Jan 2013 16:09:41 -0800 Subject: 9p: Transmit kuid and kgid values Modify the p9_client_rpc format specifiers of every function that directly transmits a uid or a gid from 'd' to 'u' or 'g' as appropriate. Modify those same functions to take kuid_t and kgid_t parameters instead of uid_t and gid_t parameters. Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: Eric W. Biederman --- fs/9p/v9fs.c | 2 +- include/net/9p/client.h | 10 +++++----- net/9p/client.c | 25 +++++++++++++------------ 3 files changed, 19 insertions(+), 18 deletions(-) (limited to 'net/9p') diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index d934f04e773..4e0bd9d62ed 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -375,7 +375,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, v9ses->flags &= ~V9FS_ACL_MASK; } - fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0, + fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, INVALID_UID, v9ses->aname); if (IS_ERR(fid)) { retval = PTR_ERR(fid); diff --git a/include/net/9p/client.h b/include/net/9p/client.h index fc9b90b0c05..6b031ab6e4d 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -220,17 +220,17 @@ void p9_client_destroy(struct p9_client *clnt); void p9_client_disconnect(struct p9_client *clnt); void p9_client_begin_disconnect(struct p9_client *clnt); struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, - char *uname, u32 n_uname, char *aname); + char *uname, kuid_t n_uname, char *aname); struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, char **wnames, int clone); int p9_client_open(struct p9_fid *fid, int mode); int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, char *extension); int p9_client_link(struct p9_fid *fid, struct p9_fid *oldfid, char *newname); -int p9_client_symlink(struct p9_fid *fid, char *name, char *symname, gid_t gid, +int p9_client_symlink(struct p9_fid *fid, char *name, char *symname, kgid_t gid, struct p9_qid *qid); int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, - gid_t gid, struct p9_qid *qid); + kgid_t gid, struct p9_qid *qid); int p9_client_clunk(struct p9_fid *fid); int p9_client_fsync(struct p9_fid *fid, int datasync); int p9_client_remove(struct p9_fid *fid); @@ -250,9 +250,9 @@ struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, u64 request_mask); int p9_client_mknod_dotl(struct p9_fid *oldfid, char *name, int mode, - dev_t rdev, gid_t gid, struct p9_qid *); + dev_t rdev, kgid_t gid, struct p9_qid *); int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, - gid_t gid, struct p9_qid *); + kgid_t gid, struct p9_qid *); int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status); int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl); struct p9_req_t *p9_tag_lookup(struct p9_client *, u16); diff --git a/net/9p/client.c b/net/9p/client.c index 34d41767093..17855f080ac 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1100,7 +1100,7 @@ void p9_client_begin_disconnect(struct p9_client *clnt) EXPORT_SYMBOL(p9_client_begin_disconnect); struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, - char *uname, u32 n_uname, char *aname) + char *uname, kuid_t n_uname, char *aname) { int err = 0; struct p9_req_t *req; @@ -1117,7 +1117,7 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, goto error; } - req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, + req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, afid ? afid->fid : P9_NOFID, uname, aname, n_uname); if (IS_ERR(req)) { err = PTR_ERR(req); @@ -1270,7 +1270,7 @@ error: EXPORT_SYMBOL(p9_client_open); int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, - gid_t gid, struct p9_qid *qid) + kgid_t gid, struct p9_qid *qid) { int err = 0; struct p9_client *clnt; @@ -1279,13 +1279,14 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, p9_debug(P9_DEBUG_9P, ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", - ofid->fid, name, flags, mode, gid); + ofid->fid, name, flags, mode, + from_kgid(&init_user_ns, gid)); clnt = ofid->clnt; if (ofid->mode != -1) return -EINVAL; - req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, + req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, mode, gid); if (IS_ERR(req)) { err = PTR_ERR(req); @@ -1358,7 +1359,7 @@ error: } EXPORT_SYMBOL(p9_client_fcreate); -int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, +int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, kgid_t gid, struct p9_qid *qid) { int err = 0; @@ -1369,7 +1370,7 @@ int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, dfid->fid, name, symtgt); clnt = dfid->clnt; - req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, + req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, gid); if (IS_ERR(req)) { err = PTR_ERR(req); @@ -2106,7 +2107,7 @@ error: EXPORT_SYMBOL(p9_client_readdir); int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, - dev_t rdev, gid_t gid, struct p9_qid *qid) + dev_t rdev, kgid_t gid, struct p9_qid *qid) { int err; struct p9_client *clnt; @@ -2116,7 +2117,7 @@ int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, clnt = fid->clnt; p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); - req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, + req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev), gid); if (IS_ERR(req)) return PTR_ERR(req); @@ -2137,7 +2138,7 @@ error: EXPORT_SYMBOL(p9_client_mknod_dotl); int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, - gid_t gid, struct p9_qid *qid) + kgid_t gid, struct p9_qid *qid) { int err; struct p9_client *clnt; @@ -2146,8 +2147,8 @@ int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, err = 0; clnt = fid->clnt; p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", - fid->fid, name, mode, gid); - req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, + fid->fid, name, mode, from_kgid(&init_user_ns, gid)); + req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, gid); if (IS_ERR(req)) return PTR_ERR(req); -- cgit v1.2.3-70-g09d2 From 447c50943fd008755122c7a62bac068e73c1cf2c Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 29 Jan 2013 16:18:50 -0800 Subject: 9p: Modify the stat structures to use kuid_t and kgid_t 9p has thre strucrtures that can encode inode stat information. Modify all of those structures to contain kuid_t and kgid_t values. Modify he wire encoders and decoders of those structures to use 'u' and 'g' instead of 'd' in the format string where uids and gids are present. This results in all kuid and kgid conversion to and from on the wire values being performed by the same code in protocol.c where the client is known at the time of the conversion. Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: Eric W. Biederman --- fs/9p/vfs_inode.c | 6 +++--- include/net/9p/9p.h | 14 +++++++------- net/9p/client.c | 18 +++++++++++++----- net/9p/protocol.c | 13 +++++++------ 4 files changed, 30 insertions(+), 21 deletions(-) (limited to 'net/9p') diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 890bed538f9..1581fe21893 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -228,9 +228,9 @@ v9fs_blank_wstat(struct p9_wstat *wstat) wstat->uid = NULL; wstat->gid = NULL; wstat->muid = NULL; - wstat->n_uid = ~0; - wstat->n_gid = ~0; - wstat->n_muid = ~0; + wstat->n_uid = INVALID_UID; + wstat->n_gid = INVALID_GID; + wstat->n_muid = INVALID_UID; wstat->extension = NULL; } diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h index 7184853ca36..27dfe85772b 100644 --- a/include/net/9p/9p.h +++ b/include/net/9p/9p.h @@ -407,17 +407,17 @@ struct p9_wstat { char *gid; char *muid; char *extension; /* 9p2000.u extensions */ - u32 n_uid; /* 9p2000.u extensions */ - u32 n_gid; /* 9p2000.u extensions */ - u32 n_muid; /* 9p2000.u extensions */ + kuid_t n_uid; /* 9p2000.u extensions */ + kgid_t n_gid; /* 9p2000.u extensions */ + kuid_t n_muid; /* 9p2000.u extensions */ }; struct p9_stat_dotl { u64 st_result_mask; struct p9_qid qid; u32 st_mode; - u32 st_uid; - u32 st_gid; + kuid_t st_uid; + kgid_t st_gid; u64 st_nlink; u64 st_rdev; u64 st_size; @@ -471,8 +471,8 @@ struct p9_stat_dotl { struct p9_iattr_dotl { u32 valid; u32 mode; - u32 uid; - u32 gid; + kuid_t uid; + kgid_t gid; u64 size; u64 atime_sec; u64 atime_nsec; diff --git a/net/9p/client.c b/net/9p/client.c index 17855f080ac..8eb75425e6e 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1711,7 +1711,9 @@ struct p9_wstat *p9_client_stat(struct p9_fid *fid) (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, ret->atime, ret->mtime, (unsigned long long)ret->length, ret->name, ret->uid, ret->gid, ret->muid, ret->extension, - ret->n_uid, ret->n_gid, ret->n_muid); + from_kuid(&init_user_ns, ret->n_uid), + from_kgid(&init_user_ns, ret->n_gid), + from_kuid(&init_user_ns, ret->n_muid)); p9_free_req(clnt, req); return ret; @@ -1765,8 +1767,10 @@ struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" "<<< st_gen=%lld st_data_version=%lld", ret->st_result_mask, ret->qid.type, ret->qid.path, - ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, - ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, + ret->qid.version, ret->st_mode, ret->st_nlink, + from_kuid(&init_user_ns, ret->st_uid), + from_kgid(&init_user_ns, ret->st_gid), + ret->st_rdev, ret->st_size, ret->st_blksize, ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, @@ -1829,7 +1833,9 @@ int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, wst->atime, wst->mtime, (unsigned long long)wst->length, wst->name, wst->uid, wst->gid, wst->muid, wst->extension, - wst->n_uid, wst->n_gid, wst->n_muid); + from_kuid(&init_user_ns, wst->n_uid), + from_kgid(&init_user_ns, wst->n_gid), + from_kuid(&init_user_ns, wst->n_muid)); req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); if (IS_ERR(req)) { @@ -1858,7 +1864,9 @@ int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) " valid=%x mode=%x uid=%d gid=%d size=%lld\n" " atime_sec=%lld atime_nsec=%lld\n" " mtime_sec=%lld mtime_nsec=%lld\n", - p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, + p9attr->valid, p9attr->mode, + from_kuid(&init_user_ns, p9attr->uid), + from_kgid(&init_user_ns, p9attr->gid), p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, p9attr->mtime_sec, p9attr->mtime_nsec); diff --git a/net/9p/protocol.c b/net/9p/protocol.c index c289c6cee98..ab9127ec5b7 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -199,11 +199,12 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt, va_arg(ap, struct p9_wstat *); memset(stbuf, 0, sizeof(struct p9_wstat)); - stbuf->n_uid = stbuf->n_gid = stbuf->n_muid = - -1; + stbuf->n_uid = stbuf->n_muid = INVALID_UID; + stbuf->n_gid = INVALID_GID; + errcode = p9pdu_readf(pdu, proto_version, - "wwdQdddqssss?sddd", + "wwdQdddqssss?sugu", &stbuf->size, &stbuf->type, &stbuf->dev, &stbuf->qid, &stbuf->mode, &stbuf->atime, @@ -316,7 +317,7 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt, memset(stbuf, 0, sizeof(struct p9_stat_dotl)); errcode = p9pdu_readf(pdu, proto_version, - "qQdddqqqqqqqqqqqqqqq", + "qQdugqqqqqqqqqqqqqqq", &stbuf->st_result_mask, &stbuf->qid, &stbuf->st_mode, @@ -426,7 +427,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, va_arg(ap, const struct p9_wstat *); errcode = p9pdu_writef(pdu, proto_version, - "wwdQdddqssss?sddd", + "wwdQdddqssss?sugu", stbuf->size, stbuf->type, stbuf->dev, &stbuf->qid, stbuf->mode, stbuf->atime, @@ -504,7 +505,7 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, struct p9_iattr_dotl *); errcode = p9pdu_writef(pdu, proto_version, - "ddddqqqqq", + "ddugqqqqq", p9attr->valid, p9attr->mode, p9attr->uid, -- cgit v1.2.3-70-g09d2