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Diffstat (limited to 'net/9p')
-rw-r--r--net/9p/client.c150
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;