Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
---
fs/cifs/cifsfs.c | 9 ++++++++
fs/cifs/cifsglob.h | 2 ++
fs/cifs/smb2ops.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/cifs/smb2pdu.c | 7 +++++-
fs/cifs/smb2pdu.h | 5 +++++
fs/cifs/smbfsctl.h | 2 +-
6 files changed, 88 insertions(+), 2 deletions(-)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 07fdf1771add..a00ef6c6a988 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -884,6 +884,9 @@ static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
{
+ struct cifsFileInfo *cfile = file->private_data;
+ struct cifs_tcon *tcon;
+
/*
* whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
* the cached file length
@@ -915,6 +918,12 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
if (rc < 0)
return (loff_t)rc;
}
+ if (cfile && cfile->tlink) {
+ tcon = tlink_tcon(cfile->tlink);
+ if (tcon->ses->server->ops->llseek)
+ return tcon->ses->server->ops->llseek(file, tcon,
+ offset, whence);
+ }
return generic_file_llseek(file, offset, whence);
}
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 0dc55f4e6929..828772da5fa4 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -493,6 +493,8 @@ struct smb_version_operations {
char *full_path,
umode_t mode,
dev_t device_number);
+ /* version specific llseek implementation */
+ loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
};
struct smb_version_values {
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 2824b97c5869..0b5133a4ce4f 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -2872,6 +2872,69 @@ 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 *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;
+
+ if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
+ if (whence == SEEK_HOLE)
+ offset = i_size_read(inode);
+ else
+ offset = offset;
+ goto lseek_exit;
+ }
+
+ in_data.file_offset = cpu_to_le64(offset);
+ in_data.length = cpu_to_le64(i_size_read(inode));
+
+ xid = get_xid();
+ 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);
+ free_xid(xid);
+ if (rc == -E2BIG)
+ rc = 0;
+ if (rc)
+ 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:
+ kfree(out_data);
+ if (!rc)
+ return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+ else
+ return rc;
+}
static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
loff_t off, loff_t len)
@@ -4247,6 +4310,7 @@ struct smb_version_operations smb30_operations = {
.next_header = smb2_next_header,
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
+ .llseek = smb3_llseek,
};
struct smb_version_operations smb311_operations = {
@@ -4356,6 +4420,7 @@ struct smb_version_operations smb311_operations = {
.next_header = smb2_next_header,
.ioctl_query_info = smb2_ioctl_query_info,
.make_node = smb2_make_node,
+ .llseek = smb3_llseek,
};
struct smb_version_values smb20_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 99a015e980d2..ac92d066c724 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2625,7 +2625,7 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
ses->Suid, 0, opcode, rc);
- if ((rc != 0) && (rc != -EINVAL)) {
+ if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
goto ioctl_exit;
} else if (rc == -EINVAL) {
@@ -2634,6 +2634,11 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
goto ioctl_exit;
}
+ } else if (rc == -E2BIG) {
+ if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
+ cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+ goto ioctl_exit;
+ }
}
/* check if caller wants to look at return data or just return rc */
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index ee8977688e21..bc9161a26400 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -842,6 +842,11 @@ struct fsctl_get_integrity_information_rsp {
__le32 ClusterSizeInBytes;
} __packed;
+struct file_allocated_range_buffer {
+ __le64 file_offset;
+ __le64 length;
+} __packed;
+
/* Integrity ChecksumAlgorithm choices for above */
#define CHECKSUM_TYPE_NONE 0x0000
#define CHECKSUM_TYPE_CRC64 0x0002
diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h
index 9b3459b9a5ce..08628e6a42ac 100644
--- a/fs/cifs/smbfsctl.h
+++ b/fs/cifs/smbfsctl.h
@@ -103,7 +103,7 @@
#define FSCTL_SET_ZERO_ON_DEALLOC 0x00090194 /* BB add struct */
#define FSCTL_SET_SHORT_NAME_BEHAVIOR 0x000901B4 /* BB add struct */
#define FSCTL_GET_INTEGRITY_INFORMATION 0x0009027C
-#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */
+#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF
#define FSCTL_SET_DEFECT_MANAGEMENT 0x00098134 /* BB add struct */
#define FSCTL_FILE_LEVEL_TRIM 0x00098208 /* BB add struct */
#define FSCTL_DUPLICATE_EXTENTS_TO_FILE 0x00098344
--
2.13.6
