diff options
Diffstat (limited to 'net/9p')
| -rw-r--r-- | net/9p/client.c | 150 |
1 files changed, 28 insertions, 122 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index 29934febecdb..5fc3aa1eb39b 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1016,7 +1016,9 @@ done: } EXPORT_SYMBOL(p9_client_remove); -int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count) +int +p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, + u32 count) { int err, n, rsize, total; struct p9_fcall *tc, *rc; @@ -1053,125 +1055,21 @@ int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count) if (n > count) n = count; - memmove(data, rc->params.rread.data, n); - count -= n; - data += n; - offset += n; - total += n; - kfree(tc); - tc = NULL; - kfree(rc); - rc = NULL; - } while (count > 0 && n == rsize); - - return total; - -error: - kfree(tc); - kfree(rc); - return err; -} -EXPORT_SYMBOL(p9_client_read); - -int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count) -{ - int err, n, rsize, total; - struct p9_fcall *tc, *rc; - struct p9_client *clnt; - - P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid, - (long long unsigned) offset, count); - err = 0; - tc = NULL; - rc = NULL; - clnt = fid->clnt; - total = 0; - - rsize = fid->iounit; - if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) - rsize = clnt->msize - P9_IOHDRSZ; - - do { - if (count < rsize) - rsize = count; - - tc = p9_create_twrite(fid->fid, offset, rsize, data); - if (IS_ERR(tc)) { - err = PTR_ERR(tc); - tc = NULL; - goto error; + if (data) { + memmove(data, rc->params.rread.data, n); + data += n; } - err = p9_client_rpc(clnt, tc, &rc); - if (err) - goto error; - - n = rc->params.rread.count; - count -= n; - data += n; - offset += n; - total += n; - kfree(tc); - tc = NULL; - kfree(rc); - rc = NULL; - } while (count > 0); - - return total; - -error: - kfree(tc); - kfree(rc); - return err; -} -EXPORT_SYMBOL(p9_client_write); - -int -p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, u32 count) -{ - int err, n, rsize, total; - struct p9_fcall *tc, *rc; - struct p9_client *clnt; - - P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid, - (long long unsigned) offset, count); - err = 0; - tc = NULL; - rc = NULL; - clnt = fid->clnt; - total = 0; - - rsize = fid->iounit; - if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) - rsize = clnt->msize - P9_IOHDRSZ; - - do { - if (count < rsize) - rsize = count; - - tc = p9_create_tread(fid->fid, offset, rsize); - if (IS_ERR(tc)) { - err = PTR_ERR(tc); - tc = NULL; - goto error; - } - - err = p9_client_rpc(clnt, tc, &rc); - if (err) - goto error; - - n = rc->params.rread.count; - if (n > count) - n = count; - - err = copy_to_user(data, rc->params.rread.data, n); - if (err) { - err = -EFAULT; - goto error; + if (udata) { + err = copy_to_user(udata, rc->params.rread.data, n); + if (err) { + err = -EFAULT; + goto error; + } + udata += n; } count -= n; - data += n; offset += n; total += n; kfree(tc); @@ -1187,11 +1085,11 @@ error: kfree(rc); return err; } -EXPORT_SYMBOL(p9_client_uread); +EXPORT_SYMBOL(p9_client_read); int -p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset, - u32 count) +p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, + u64 offset, u32 count) { int err, n, rsize, total; struct p9_fcall *tc, *rc; @@ -1213,7 +1111,10 @@ p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset, if (count < rsize) rsize = count; - tc = p9_create_twrite_u(fid->fid, offset, rsize, data); + if (data) + tc = p9_create_twrite(fid->fid, offset, rsize, data); + else + tc = p9_create_twrite_u(fid->fid, offset, rsize, udata); if (IS_ERR(tc)) { err = PTR_ERR(tc); tc = NULL; @@ -1226,7 +1127,12 @@ p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset, n = rc->params.rread.count; count -= n; - data += n; + + if (data) + data += n; + else + udata += n; + offset += n; total += n; kfree(tc); @@ -1242,7 +1148,7 @@ error: kfree(rc); return err; } -EXPORT_SYMBOL(p9_client_uwrite); +EXPORT_SYMBOL(p9_client_write); int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count) { @@ -1253,7 +1159,7 @@ int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count) n = 0; total = 0; while (count) { - n = p9_client_read(fid, data, offset, count); + n = p9_client_read(fid, data, NULL, offset, count); if (n <= 0) break; |