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-rw-r--r--fs/cifs/smb2ops.c540
1 files changed, 381 insertions, 159 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index ea92a38b2f08..541258447c4c 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -444,7 +444,11 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
NULL /* no data input */, 0 /* no data input */,
(char **)&out_buf, &ret_data_len);
- if (rc != 0) {
+ if (rc == -EOPNOTSUPP) {
+ cifs_dbg(FYI,
+ "server does not support query network interfaces\n");
+ goto out;
+ } else if (rc != 0) {
cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
goto out;
}
@@ -466,21 +470,36 @@ out:
return rc;
}
-void
-smb2_cached_lease_break(struct work_struct *work)
+static void
+smb2_close_cached_fid(struct kref *ref)
{
- struct cached_fid *cfid = container_of(work,
- struct cached_fid, lease_break);
- mutex_lock(&cfid->fid_mutex);
+ struct cached_fid *cfid = container_of(ref, struct cached_fid,
+ refcount);
+
if (cfid->is_valid) {
cifs_dbg(FYI, "clear cached root file handle\n");
SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
cfid->fid->volatile_fid);
cfid->is_valid = false;
}
+}
+
+void close_shroot(struct cached_fid *cfid)
+{
+ mutex_lock(&cfid->fid_mutex);
+ kref_put(&cfid->refcount, smb2_close_cached_fid);
mutex_unlock(&cfid->fid_mutex);
}
+void
+smb2_cached_lease_break(struct work_struct *work)
+{
+ struct cached_fid *cfid = container_of(work,
+ struct cached_fid, lease_break);
+
+ close_shroot(cfid);
+}
+
/*
* Open the directory at the root of a share
*/
@@ -495,6 +514,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
if (tcon->crfid.is_valid) {
cifs_dbg(FYI, "found a cached root file handle\n");
memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
+ kref_get(&tcon->crfid.refcount);
mutex_unlock(&tcon->crfid.fid_mutex);
return 0;
}
@@ -511,6 +531,8 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
tcon->crfid.tcon = tcon;
tcon->crfid.is_valid = true;
+ kref_init(&tcon->crfid.refcount);
+ kref_get(&tcon->crfid.refcount);
}
mutex_unlock(&tcon->crfid.fid_mutex);
return rc;
@@ -549,9 +571,14 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_DEVICE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+ FS_VOLUME_INFORMATION);
+ SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
if (no_cached_open)
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+ else
+ close_shroot(&tcon->crfid);
+
return;
}
@@ -873,13 +900,11 @@ smb2_can_echo(struct TCP_Server_Info *server)
static void
smb2_clear_stats(struct cifs_tcon *tcon)
{
-#ifdef CONFIG_CIFS_STATS
int i;
for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
}
-#endif
}
static void
@@ -918,67 +943,58 @@ smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
static void
smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
{
-#ifdef CONFIG_CIFS_STATS
atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
- seq_printf(m, "\nNegotiates: %d sent %d failed",
- atomic_read(&sent[SMB2_NEGOTIATE_HE]),
- atomic_read(&failed[SMB2_NEGOTIATE_HE]));
- seq_printf(m, "\nSessionSetups: %d sent %d failed",
- atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
- atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
- seq_printf(m, "\nLogoffs: %d sent %d failed",
- atomic_read(&sent[SMB2_LOGOFF_HE]),
- atomic_read(&failed[SMB2_LOGOFF_HE]));
- seq_printf(m, "\nTreeConnects: %d sent %d failed",
+
+ /*
+ * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
+ * totals (requests sent) since those SMBs are per-session not per tcon
+ */
+ seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
+ (long long)(tcon->bytes_read),
+ (long long)(tcon->bytes_written));
+ seq_printf(m, "\nTreeConnects: %d total %d failed",
atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
- seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
+ seq_printf(m, "\nTreeDisconnects: %d total %d failed",
atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
- seq_printf(m, "\nCreates: %d sent %d failed",
+ seq_printf(m, "\nCreates: %d total %d failed",
atomic_read(&sent[SMB2_CREATE_HE]),
atomic_read(&failed[SMB2_CREATE_HE]));
- seq_printf(m, "\nCloses: %d sent %d failed",
+ seq_printf(m, "\nCloses: %d total %d failed",
atomic_read(&sent[SMB2_CLOSE_HE]),
atomic_read(&failed[SMB2_CLOSE_HE]));
- seq_printf(m, "\nFlushes: %d sent %d failed",
+ seq_printf(m, "\nFlushes: %d total %d failed",
atomic_read(&sent[SMB2_FLUSH_HE]),
atomic_read(&failed[SMB2_FLUSH_HE]));
- seq_printf(m, "\nReads: %d sent %d failed",
+ seq_printf(m, "\nReads: %d total %d failed",
atomic_read(&sent[SMB2_READ_HE]),
atomic_read(&failed[SMB2_READ_HE]));
- seq_printf(m, "\nWrites: %d sent %d failed",
+ seq_printf(m, "\nWrites: %d total %d failed",
atomic_read(&sent[SMB2_WRITE_HE]),
atomic_read(&failed[SMB2_WRITE_HE]));
- seq_printf(m, "\nLocks: %d sent %d failed",
+ seq_printf(m, "\nLocks: %d total %d failed",
atomic_read(&sent[SMB2_LOCK_HE]),
atomic_read(&failed[SMB2_LOCK_HE]));
- seq_printf(m, "\nIOCTLs: %d sent %d failed",
+ seq_printf(m, "\nIOCTLs: %d total %d failed",
atomic_read(&sent[SMB2_IOCTL_HE]),
atomic_read(&failed[SMB2_IOCTL_HE]));
- seq_printf(m, "\nCancels: %d sent %d failed",
- atomic_read(&sent[SMB2_CANCEL_HE]),
- atomic_read(&failed[SMB2_CANCEL_HE]));
- seq_printf(m, "\nEchos: %d sent %d failed",
- atomic_read(&sent[SMB2_ECHO_HE]),
- atomic_read(&failed[SMB2_ECHO_HE]));
- seq_printf(m, "\nQueryDirectories: %d sent %d failed",
+ seq_printf(m, "\nQueryDirectories: %d total %d failed",
atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
- seq_printf(m, "\nChangeNotifies: %d sent %d failed",
+ seq_printf(m, "\nChangeNotifies: %d total %d failed",
atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
- seq_printf(m, "\nQueryInfos: %d sent %d failed",
+ seq_printf(m, "\nQueryInfos: %d total %d failed",
atomic_read(&sent[SMB2_QUERY_INFO_HE]),
atomic_read(&failed[SMB2_QUERY_INFO_HE]));
- seq_printf(m, "\nSetInfos: %d sent %d failed",
+ seq_printf(m, "\nSetInfos: %d total %d failed",
atomic_read(&sent[SMB2_SET_INFO_HE]),
atomic_read(&failed[SMB2_SET_INFO_HE]));
seq_printf(m, "\nOplockBreaks: %d sent %d failed",
atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
-#endif
}
static void
@@ -1353,6 +1369,13 @@ smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
}
+/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
+#define GMT_TOKEN_SIZE 50
+
+/*
+ * Input buffer contains (empty) struct smb_snapshot array with size filled in
+ * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
+ */
static int
smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, void __user *ioc_buf)
@@ -1382,14 +1405,27 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
kfree(retbuf);
return rc;
}
- if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
- rc = -ERANGE;
- kfree(retbuf);
- return rc;
- }
- if (ret_data_len > snapshot_in.snapshot_array_size)
- ret_data_len = snapshot_in.snapshot_array_size;
+ /*
+ * Check for min size, ie not large enough to fit even one GMT
+ * token (snapshot). On the first ioctl some users may pass in
+ * smaller size (or zero) to simply get the size of the array
+ * so the user space caller can allocate sufficient memory
+ * and retry the ioctl again with larger array size sufficient
+ * to hold all of the snapshot GMT tokens on the second try.
+ */
+ if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
+ ret_data_len = sizeof(struct smb_snapshot_array);
+
+ /*
+ * We return struct SRV_SNAPSHOT_ARRAY, followed by
+ * the snapshot array (of 50 byte GMT tokens) each
+ * representing an available previous version of the data
+ */
+ if (ret_data_len > (snapshot_in.snapshot_array_size +
+ sizeof(struct smb_snapshot_array)))
+ ret_data_len = snapshot_in.snapshot_array_size +
+ sizeof(struct smb_snapshot_array);
if (copy_to_user(ioc_buf, retbuf, ret_data_len))
rc = -EFAULT;
@@ -1487,7 +1523,11 @@ smb2_is_session_expired(char *buf)
shdr->Status != STATUS_USER_SESSION_DELETED)
return false;
+ trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
+ le16_to_cpu(shdr->Command),
+ le64_to_cpu(shdr->MessageId));
cifs_dbg(FYI, "Session expired or deleted\n");
+
return true;
}
@@ -1504,16 +1544,140 @@ smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
CIFS_CACHE_READ(cinode) ? 1 : 0);
}
+static void
+smb2_set_related(struct smb_rqst *rqst)
+{
+ struct smb2_sync_hdr *shdr;
+
+ shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
+ shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
+}
+
+char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
+
+static void
+smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst)
+{
+ struct smb2_sync_hdr *shdr;
+ unsigned long len = smb_rqst_len(server, rqst);
+
+ /* SMB headers in a compound are 8 byte aligned. */
+ if (len & 7) {
+ rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
+ rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7);
+ rqst->rq_nvec++;
+ len = smb_rqst_len(server, rqst);
+ }
+
+ shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
+ shdr->NextCommand = cpu_to_le32(len);
+}
+
static int
smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *buf)
{
+ struct smb2_query_info_rsp *rsp;
+ struct smb2_fs_full_size_info *info = NULL;
+ struct smb_rqst rqst[3];
+ int resp_buftype[3];
+ struct kvec rsp_iov[3];
+ struct kvec open_iov[5]; /* 4 + potential padding. */
+ struct kvec qi_iov[1];
+ struct kvec close_iov[1];
+ struct cifs_ses *ses = tcon->ses;
+ struct TCP_Server_Info *server = ses->server;
+ __le16 srch_path = 0; /* Null - open root of share */
+ u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+ struct cifs_open_parms oparms;
+ struct cifs_fid fid;
+ int flags = 0;
+ int rc;
+
+ if (smb3_encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ memset(rqst, 0, sizeof(rqst));
+ memset(resp_buftype, 0, sizeof(resp_buftype));
+ memset(rsp_iov, 0, sizeof(rsp_iov));
+
+ memset(&open_iov, 0, sizeof(open_iov));
+ rqst[0].rq_iov = open_iov;
+ rqst[0].rq_nvec = 4;
+
+ oparms.tcon = tcon;
+ oparms.desired_access = FILE_READ_ATTRIBUTES;
+ oparms.disposition = FILE_OPEN;
+ oparms.create_options = 0;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);
+ if (rc)
+ goto qfs_exit;
+ smb2_set_next_command(server, &rqst[0]);
+
+ memset(&qi_iov, 0, sizeof(qi_iov));
+ rqst[1].rq_iov = qi_iov;
+ rqst[1].rq_nvec = 1;
+
+ rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
+ FS_FULL_SIZE_INFORMATION,
+ SMB2_O_INFO_FILESYSTEM, 0,
+ sizeof(struct smb2_fs_full_size_info));
+ if (rc)
+ goto qfs_exit;
+ smb2_set_next_command(server, &rqst[1]);
+ smb2_set_related(&rqst[1]);
+
+ memset(&close_iov, 0, sizeof(close_iov));
+ rqst[2].rq_iov = close_iov;
+ rqst[2].rq_nvec = 1;
+
+ rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
+ if (rc)
+ goto qfs_exit;
+ smb2_set_related(&rqst[2]);
+
+ rc = compound_send_recv(xid, ses, flags, 3, rqst,
+ resp_buftype, rsp_iov);
+ if (rc)
+ goto qfs_exit;
+
+ rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+ buf->f_type = SMB2_MAGIC_NUMBER;
+ info = (struct smb2_fs_full_size_info *)(
+ le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+ rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+ le32_to_cpu(rsp->OutputBufferLength),
+ &rsp_iov[1],
+ sizeof(struct smb2_fs_full_size_info));
+ if (!rc)
+ smb2_copy_fs_info_to_kstatfs(info, buf);
+
+qfs_exit:
+ SMB2_open_free(&rqst[0]);
+ SMB2_query_info_free(&rqst[1]);
+ SMB2_close_free(&rqst[2]);
+ free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+ free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+ free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+ return rc;
+}
+
+static int
+smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
+ struct kstatfs *buf)
+{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
+ if (!tcon->posix_extensions)
+ return smb2_queryfs(xid, tcon, buf);
+
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
@@ -1524,9 +1688,10 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
if (rc)
return rc;
+
+ rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
+ fid.volatile_fid, buf);
buf->f_type = SMB2_MAGIC_NUMBER;
- rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
- buf);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return rc;
}
@@ -1700,7 +1865,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
&resp_buftype);
if (!rc || !err_iov.iov_base) {
rc = -ENOENT;
- goto querty_exit;
+ goto free_path;
}
err_buf = err_iov.iov_base;
@@ -1741,6 +1906,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
querty_exit:
free_rsp_buf(resp_buftype, err_buf);
+ free_path:
kfree(utf16_path);
return rc;
}
@@ -2326,35 +2492,51 @@ static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
}
-/* Assumes:
- * rqst->rq_iov[0] is transform header
- * rqst->rq_iov[1+] data to be encrypted/decrypted
+/* Assumes the first rqst has a transform header as the first iov.
+ * I.e.
+ * rqst[0].rq_iov[0] is transform header
+ * rqst[0].rq_iov[1+] data to be encrypted/decrypted
+ * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
*/
static struct scatterlist *
-init_sg(struct smb_rqst *rqst, u8 *sign)
+init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
{
- unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
- unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
+ unsigned int sg_len;
struct scatterlist *sg;
unsigned int i;
unsigned int j;
+ unsigned int idx = 0;
+ int skip;
+
+ sg_len = 1;
+ for (i = 0; i < num_rqst; i++)
+ sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
if (!sg)
return NULL;
sg_init_table(sg, sg_len);
- smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 20, assoc_data_len);
- for (i = 1; i < rqst->rq_nvec; i++)
- smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
- rqst->rq_iov[i].iov_len);
- for (j = 0; i < sg_len - 1; i++, j++) {
- unsigned int len, offset;
+ for (i = 0; i < num_rqst; i++) {
+ for (j = 0; j < rqst[i].rq_nvec; j++) {
+ /*
+ * The first rqst has a transform header where the
+ * first 20 bytes are not part of the encrypted blob
+ */
+ skip = (i == 0) && (j == 0) ? 20 : 0;
+ smb2_sg_set_buf(&sg[idx++],
+ rqst[i].rq_iov[j].iov_base + skip,
+ rqst[i].rq_iov[j].iov_len - skip);
+ }
- rqst_page_get_length(rqst, j, &len, &offset);
- sg_set_page(&sg[i], rqst->rq_pages[j], len, offset);
+ for (j = 0; j < rqst[i].rq_npages; j++) {
+ unsigned int len, offset;
+
+ rqst_page_get_length(&rqst[i], j, &len, &offset);
+ sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
+ }
}
- smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
+ smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
return sg;
}
@@ -2386,10 +2568,11 @@ smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
* untouched.
*/
static int
-crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
+crypt_message(struct TCP_Server_Info *server, int num_rqst,
+ struct smb_rqst *rqst, int enc)
{
struct smb2_transform_hdr *tr_hdr =
- (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
+ (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
int rc = 0;
struct scatterlist *sg;
@@ -2440,7 +2623,7 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
crypt_len += SMB2_SIGNATURE_SIZE;
}
- sg = init_sg(rqst, sign);
+ sg = init_sg(num_rqst, rqst, sign);
if (!sg) {
cifs_dbg(VFS, "%s: Failed to init sg", __func__);
rc = -ENOMEM;
@@ -2477,103 +2660,98 @@ free_req:
return rc;
}
+void
+smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
+{
+ int i, j;
+
+ for (i = 0; i < num_rqst; i++) {
+ if (rqst[i].rq_pages) {
+ for (j = rqst[i].rq_npages - 1; j >= 0; j--)
+ put_page(rqst[i].rq_pages[j]);
+ kfree(rqst[i].rq_pages);
+ }
+ }
+}
+
+/*
+ * This function will initialize new_rq and encrypt the content.
+ * The first entry, new_rq[0], only contains a single iov which contains
+ * a smb2_transform_hdr and is pre-allocated by the caller.
+ * This function then populates new_rq[1+] with the content from olq_rq[0+].
+ *
+ * The end result is an array of smb_rqst structures where the first structure
+ * only contains a single iov for the transform header which we then can pass
+ * to crypt_message().
+ *
+ * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
+ * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
+ */
static int
-smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
- struct smb_rqst *old_rq)
+smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
+ struct smb_rqst *new_rq, struct smb_rqst *old_rq)
{
- struct kvec *iov;
struct page **pages;
- struct smb2_transform_hdr *tr_hdr;
- unsigned int npages = old_rq->rq_npages;
- unsigned int orig_len;
- int i;
+ struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
+ unsigned int npages;
+ unsigned int orig_len = 0;
+ int i, j;
int rc = -ENOMEM;
- pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
- if (!pages)
- return rc;
-
- new_rq->rq_pages = pages;
- new_rq->rq_offset = old_rq->rq_offset;
- new_rq->rq_npages = old_rq->rq_npages;
- new_rq->rq_pagesz = old_rq->rq_pagesz;
- new_rq->rq_tailsz = old_rq->rq_tailsz;
-
- for (i = 0; i < npages; i++) {
- pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
- if (!pages[i])
- goto err_free_pages;
- }
-
- iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
- GFP_KERNEL);
- if (!iov)
- goto err_free_pages;
+ for (i = 1; i < num_rqst; i++) {
+ npages = old_rq[i - 1].rq_npages;
+ pages = kmalloc_array(npages, sizeof(struct page *),
+ GFP_KERNEL);
+ if (!pages)
+ goto err_free;
+
+ new_rq[i].rq_pages = pages;
+ new_rq[i].rq_npages = npages;
+ new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
+ new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
+ new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
+ new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
+ new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
+
+ orig_len += smb_rqst_len(server, &old_rq[i - 1]);
+
+ for (j = 0; j < npages; j++) {
+ pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
+ if (!pages[j])
+ goto err_free;
+ }
- /* copy all iovs from the old */
- memcpy(&iov[1], &old_rq->rq_iov[0],
- sizeof(struct kvec) * old_rq->rq_nvec);
+ /* copy pages form the old */
+ for (j = 0; j < npages; j++) {
+ char *dst, *src;
+ unsigned int offset, len;
- new_rq->rq_iov = iov;
- new_rq->rq_nvec = old_rq->rq_nvec + 1;
+ rqst_page_get_length(&new_rq[i], j, &len, &offset);
- tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
- if (!tr_hdr)
- goto err_free_iov;
+ dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
+ src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
- orig_len = smb_rqst_len(server, old_rq);
+ memcpy(dst, src, len);
+ kunmap(new_rq[i].rq_pages[j]);
+ kunmap(old_rq[i - 1].rq_pages[j]);
+ }
+ }
- /* fill the 2nd iov with a transform header */
+ /* fill the 1st iov with a transform header */
fill_transform_hdr(tr_hdr, orig_len, old_rq);
- new_rq->rq_iov[0].iov_base = tr_hdr;
- new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
-
- /* copy pages form the old */
- for (i = 0; i < npages; i++) {
- char *dst, *src;
- unsigned int offset, len;
-
- rqst_page_get_length(new_rq, i, &len, &offset);
-
- dst = (char *) kmap(new_rq->rq_pages[i]) + offset;
- src = (char *) kmap(old_rq->rq_pages[i]) + offset;
- memcpy(dst, src, len);
- kunmap(new_rq->rq_pages[i]);
- kunmap(old_rq->rq_pages[i]);
- }
-
- rc = crypt_message(server, new_rq, 1);
+ rc = crypt_message(server, num_rqst, new_rq, 1);
cifs_dbg(FYI, "encrypt message returned %d", rc);
if (rc)
- goto err_free_tr_hdr;
+ goto err_free;
return rc;
-err_free_tr_hdr:
- kfree(tr_hdr);
-err_free_iov:
- kfree(iov);
-err_free_pages:
- for (i = i - 1; i >= 0; i--)
- put_page(pages[i]);
- kfree(pages);
+err_free:
+ smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
return rc;
}
-static void
-smb3_free_transform_rq(struct smb_rqst *rqst)
-{
- int i = rqst->rq_npages - 1;
-
- for (; i >= 0; i--)
- put_page(rqst->rq_pages[i]);
- kfree(rqst->rq_pages);
- /* free transform header */
- kfree(rqst->rq_iov[0].iov_base);
- kfree(rqst->rq_iov);
-}
-
static int
smb3_is_transform_hdr(void *buf)
{
@@ -2603,7 +2781,7 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
rqst.rq_pagesz = PAGE_SIZE;
rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
- rc = crypt_message(server, &rqst, 0);
+ rc = crypt_message(server, 1, &rqst, 0);
cifs_dbg(FYI, "decrypt message returned %d\n", rc);
if (rc)
@@ -2878,13 +3056,20 @@ discard_data:
static int
receive_encrypted_standard(struct TCP_Server_Info *server,
- struct mid_q_entry **mid)
+ struct mid_q_entry **mids, char **bufs,
+ int *num_mids)
{
- int length;
+ int ret, length;
char *buf = server->smallbuf;
+ char *tmpbuf;
+ struct smb2_sync_hdr *shdr;
unsigned int pdu_length = server->pdu_size;
unsigned int buf_size;
struct mid_q_entry *mid_entry;
+ int next_is_large;
+ char *next_buffer = NULL;
+
+ *num_mids = 0;
/* switch to large buffer if too big for a small one */
if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
@@ -2905,24 +3090,61 @@ receive_encrypted_standard(struct TCP_Server_Info *server,
if (length)
return length;
+ next_is_large = server->large_buf;
+ one_more:
+ shdr = (struct smb2_sync_hdr *)buf;
+ if (shdr->NextCommand) {
+ if (next_is_large) {
+ tmpbuf = server->bigbuf;
+ next_buffer = (char *)cifs_buf_get();
+ } else {
+ tmpbuf = server->smallbuf;
+ next_buffer = (char *)cifs_small_buf_get();
+ }
+ memcpy(next_buffer,
+ tmpbuf + le32_to_cpu(shdr->NextCommand),
+ pdu_length - le32_to_cpu(shdr->NextCommand));
+ }
+
mid_entry = smb2_find_mid(server, buf);
if (mid_entry == NULL)
cifs_dbg(FYI, "mid not found\n");
else {
cifs_dbg(FYI, "mid found\n");
mid_entry->decrypted = true;
+ mid_entry->resp_buf_size = server->pdu_size;
}
- *mid = mid_entry;
+ if (*num_mids >= MAX_COMPOUND) {
+ cifs_dbg(VFS, "too many PDUs in compound\n");
+ return -1;
+ }
+ bufs[*num_mids] = buf;
+ mids[(*num_mids)++] = mid_entry;
if (mid_entry && mid_entry->handle)
- return mid_entry->handle(server, mid_entry);
+ ret = mid_entry->handle(server, mid_entry);
+ else
+ ret = cifs_handle_standard(server, mid_entry);
- return cifs_handle_standard(server, mid_entry);
+ if (ret == 0 && shdr->NextCommand) {
+ pdu_length -= le32_to_cpu(shdr->NextCommand);
+ server->large_buf = next_is_large;
+ if (next_is_large)
+ server->bigbuf = next_buffer;
+ else
+ server->smallbuf = next_buffer;
+
+ buf += le32_to_cpu(shdr->NextCommand);
+ goto one_more;
+ }
+
+ return ret;
}
static int
-smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
+smb3_receive_transform(struct TCP_Server_Info *server,
+ struct mid_q_entry **mids, char **bufs, int *num_mids)
{
char *buf = server->smallbuf;
unsigned int pdu_length = server->pdu_size;
@@ -2945,10 +3167,11 @@ smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
return -ECONNABORTED;
}
+ /* TODO: add support for compounds containing READ. */
if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
- return receive_encrypted_read(server, mid);
+ return receive_encrypted_read(server, &mids[0]);
- return receive_encrypted_standard(server, mid);
+ return receive_encrypted_standard(server, mids, bufs, num_mids);
}
int
@@ -3250,7 +3473,6 @@ struct smb_version_operations smb30_operations = {
.fallocate = smb3_fallocate,
.enum_snapshots = smb3_enum_snapshots,
.init_transform_rq = smb3_init_transform_rq,
- .free_transform_rq = smb3_free_transform_rq,
.is_transform_hdr = smb3_is_transform_hdr,
.receive_transform = smb3_receive_transform,
.get_dfs_refer = smb2_get_dfs_refer,
@@ -3267,7 +3489,6 @@ struct smb_version_operations smb30_operations = {
.next_header = smb2_next_header,
};
-#ifdef CONFIG_CIFS_SMB311
struct smb_version_operations smb311_operations = {
.compare_fids = smb2_compare_fids,
.setup_request = smb2_setup_request,
@@ -3335,7 +3556,7 @@ struct smb_version_operations smb311_operations = {
.is_status_pending = smb2_is_status_pending,
.is_session_expired = smb2_is_session_expired,
.oplock_response = smb2_oplock_response,
- .queryfs = smb2_queryfs,
+ .queryfs = smb311_queryfs,
.mand_lock = smb2_mand_lock,
.mand_unlock_range = smb2_unlock_range,
.push_mand_locks = smb2_push_mandatory_locks,
@@ -3357,7 +3578,6 @@ struct smb_version_operations smb311_operations = {
.fallocate = smb3_fallocate,
.enum_snapshots = smb3_enum_snapshots,
.init_transform_rq = smb3_init_transform_rq,
- .free_transform_rq = smb3_free_transform_rq,
.is_transform_hdr = smb3_is_transform_hdr,
.receive_transform = smb3_receive_transform,
.get_dfs_refer = smb2_get_dfs_refer,
@@ -3366,9 +3586,13 @@ struct smb_version_operations smb311_operations = {
.query_all_EAs = smb2_query_eas,
.set_EA = smb2_set_ea,
#endif /* CIFS_XATTR */
+#ifdef CONFIG_CIFS_ACL
+ .get_acl = get_smb2_acl,
+ .get_acl_by_fid = get_smb2_acl_by_fid,
+ .set_acl = set_smb2_acl,
+#endif /* CIFS_ACL */
.next_header = smb2_next_header,
};
-#endif /* CIFS_SMB311 */
struct smb_version_values smb20_values = {
.version_string = SMB20_VERSION_STRING,
@@ -3496,7 +3720,6 @@ struct smb_version_values smb302_values = {
.create_lease_size = sizeof(struct create_lease_v2),
};
-#ifdef CONFIG_CIFS_SMB311
struct smb_version_values smb311_values = {
.version_string = SMB311_VERSION_STRING,
.protocol_id = SMB311_PROT_ID,
@@ -3517,4 +3740,3 @@ struct smb_version_values smb311_values = {
.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
.create_lease_size = sizeof(struct create_lease_v2),
};
-#endif /* SMB311 */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-28 12:09:51 +0300