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Diffstat (limited to 'fs/cifs/smb2ops.c')
-rw-r--r--fs/cifs/smb2ops.c134
1 files changed, 111 insertions, 23 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index a930c8965e5c..e921e6511728 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* SMB2 version specific operations
*
@@ -282,7 +283,7 @@ smb2_find_mid(struct TCP_Server_Info *server, char *buf)
__u64 wire_mid = le64_to_cpu(shdr->MessageId);
if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
- cifs_dbg(VFS, "encrypted frame parsing not supported yet");
+ cifs_dbg(VFS, "Encrypted frame parsing not supported yet\n");
return NULL;
}
@@ -324,6 +325,7 @@ static int
smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
{
int rc;
+
ses->server->CurrentMid = 0;
rc = SMB2_negotiate(xid, ses);
/* BB we probably don't need to retry with modern servers */
@@ -789,8 +791,6 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
else
close_shroot(&tcon->crfid);
-
- return;
}
static void
@@ -818,7 +818,6 @@ smb2_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_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
- return;
}
static int
@@ -906,9 +905,8 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size,
value = &src->ea_data[src->ea_name_length + 1];
value_len = (size_t)le16_to_cpu(src->ea_value_length);
- if (name_len == 0) {
+ if (name_len == 0)
break;
- }
if (src_size < 8 + name_len + 1 + value_len) {
cifs_dbg(FYI, "EA entry goes beyond length of list\n");
@@ -1161,6 +1159,7 @@ static void
smb2_clear_stats(struct cifs_tcon *tcon)
{
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);
@@ -1529,7 +1528,7 @@ smb2_copychunk_range(const unsigned int xid,
if (pcchunk == NULL)
return -ENOMEM;
- cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
+ cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
/* Request a key from the server to identify the source of the copy */
rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
srcfile->fid.persistent_fid,
@@ -1649,6 +1648,7 @@ static unsigned int
smb2_read_data_offset(char *buf)
{
struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
+
return rsp->DataOffset;
}
@@ -1777,7 +1777,7 @@ smb2_duplicate_extents(const unsigned int xid,
dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
dup_ext_buf.ByteCount = cpu_to_le64(len);
- cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
+ cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
src_off, dest_off, len);
rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
@@ -1794,7 +1794,7 @@ smb2_duplicate_extents(const unsigned int xid,
&ret_data_len);
if (ret_data_len > 0)
- cifs_dbg(FYI, "non-zero response length in duplicate extents");
+ cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
duplicate_extents_out:
return rc;
@@ -1983,9 +1983,9 @@ smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
}
/*
-* If we negotiate SMB2 protocol and get STATUS_PENDING - update
-* the number of credits and return true. Otherwise - return false.
-*/
+ * If we negotiate SMB2 protocol and get STATUS_PENDING - update
+ * the number of credits and return true. Otherwise - return false.
+ */
static bool
smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
{
@@ -2306,7 +2306,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
struct get_dfs_referral_rsp *dfs_rsp = NULL;
u32 dfs_req_size = 0, dfs_rsp_size = 0;
- cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
+ cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
/*
* Try to use the IPC tcon, otherwise just use any
@@ -2360,7 +2360,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
if (rc) {
if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
- cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
+ cifs_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
goto out;
}
@@ -2369,7 +2369,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
nls_codepage, remap, search_name,
true /* is_unicode */);
if (rc) {
- cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
+ cifs_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
goto out;
}
@@ -2745,7 +2745,7 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
inode = d_inode(cfile->dentry);
cifsi = CIFS_I(inode);
- trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+ trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
ses->Suid, offset, len);
@@ -2759,7 +2759,7 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
return rc;
}
- cifs_dbg(FYI, "offset %lld len %lld", offset, len);
+ cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
fsctl_buf.FileOffset = cpu_to_le64(offset);
fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
@@ -2816,7 +2816,7 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
return rc;
}
- cifs_dbg(FYI, "offset %lld len %lld", offset, len);
+ cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
fsctl_buf.FileOffset = cpu_to_le64(offset);
fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
@@ -2922,6 +2922,90 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
return rc;
}
+static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
+{
+ struct cifsFileInfo *wrcfile, *cfile = file->private_data;
+ struct cifsInodeInfo *cifsi;
+ struct inode *inode;
+ int rc = 0;
+ struct file_allocated_range_buffer in_data, *out_data = NULL;
+ u32 out_data_len;
+ unsigned int xid;
+
+ if (whence != SEEK_HOLE && whence != SEEK_DATA)
+ return generic_file_llseek(file, offset, whence);
+
+ inode = d_inode(cfile->dentry);
+ cifsi = CIFS_I(inode);
+
+ if (offset < 0 || offset >= i_size_read(inode))
+ return -ENXIO;
+
+ xid = get_xid();
+ /*
+ * We need to be sure that all dirty pages are written as they
+ * might fill holes on the server.
+ * Note that we also MUST flush any written pages since at least
+ * some servers (Windows2016) will not reflect recent writes in
+ * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
+ */
+ wrcfile = find_writable_file(cifsi, false);
+ if (wrcfile) {
+ filemap_write_and_wait(inode->i_mapping);
+ smb2_flush_file(xid, tcon, &wrcfile->fid);
+ cifsFileInfo_put(wrcfile);
+ }
+
+ if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
+ if (whence == SEEK_HOLE)
+ offset = i_size_read(inode);
+ goto lseek_exit;
+ }
+
+ in_data.file_offset = cpu_to_le64(offset);
+ in_data.length = cpu_to_le64(i_size_read(inode));
+
+ rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+ cfile->fid.volatile_fid,
+ FSCTL_QUERY_ALLOCATED_RANGES, true,
+ (char *)&in_data, sizeof(in_data),
+ sizeof(struct file_allocated_range_buffer),
+ (char **)&out_data, &out_data_len);
+ if (rc == -E2BIG)
+ rc = 0;
+ if (rc)
+ goto lseek_exit;
+
+ if (whence == SEEK_HOLE && out_data_len == 0)
+ goto lseek_exit;
+
+ if (whence == SEEK_DATA && out_data_len == 0) {
+ rc = -ENXIO;
+ goto lseek_exit;
+ }
+
+ if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+ rc = -EINVAL;
+ goto lseek_exit;
+ }
+ if (whence == SEEK_DATA) {
+ offset = le64_to_cpu(out_data->file_offset);
+ goto lseek_exit;
+ }
+ if (offset < le64_to_cpu(out_data->file_offset))
+ goto lseek_exit;
+
+ offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
+
+ lseek_exit:
+ free_xid(xid);
+ kfree(out_data);
+ if (!rc)
+ return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+ else
+ return rc;
+}
+
static int smb3_fiemap(struct cifs_tcon *tcon,
struct cifsFileInfo *cfile,
struct fiemap_extent_info *fei, u64 start, u64 len)
@@ -3384,7 +3468,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
- cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
+ cifs_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
return -ENOMEM;
}
@@ -3395,7 +3479,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
sg = init_sg(num_rqst, rqst, sign);
if (!sg) {
- cifs_dbg(VFS, "%s: Failed to init sg", __func__);
+ cifs_dbg(VFS, "%s: Failed to init sg\n", __func__);
rc = -ENOMEM;
goto free_req;
}
@@ -3403,7 +3487,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
iv_len = crypto_aead_ivsize(tfm);
iv = kzalloc(iv_len, GFP_KERNEL);
if (!iv) {
- cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
+ cifs_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
rc = -ENOMEM;
goto free_sg;
}
@@ -3511,7 +3595,7 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
fill_transform_hdr(tr_hdr, orig_len, old_rq);
rc = crypt_message(server, num_rqst, new_rq, 1);
- cifs_dbg(FYI, "encrypt message returned %d", rc);
+ cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
if (rc)
goto err_free;
@@ -3552,7 +3636,7 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
rc = crypt_message(server, 1, &rqst, 0);
- cifs_dbg(FYI, "decrypt message returned %d\n", rc);
+ cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
if (rc)
return rc;
@@ -4166,6 +4250,7 @@ struct smb_version_operations smb20_operations = {
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
+ .llseek = smb3_llseek,
};
struct smb_version_operations smb21_operations = {
@@ -4266,6 +4351,7 @@ struct smb_version_operations smb21_operations = {
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
+ .llseek = smb3_llseek,
};
struct smb_version_operations smb30_operations = {
@@ -4375,6 +4461,7 @@ struct smb_version_operations smb30_operations = {
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
+ .llseek = smb3_llseek,
};
struct smb_version_operations smb311_operations = {
@@ -4485,6 +4572,7 @@ struct smb_version_operations smb311_operations = {
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
.fiemap = smb3_fiemap,
+ .llseek = smb3_llseek,
};
struct smb_version_values smb20_values = {
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-11 14:38:02 +0300