diff options
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 4002e1433ccb..78bca7d46eac 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -2886,6 +2886,79 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, return rc; } +static int smb3_fiemap(struct cifs_tcon *tcon, + struct cifsFileInfo *cfile, + struct fiemap_extent_info *fei, u64 start, u64 len) +{ + unsigned int xid; + struct file_allocated_range_buffer in_data, *out_data; + u32 out_data_len; + int i, num, rc, flags, last_blob; + u64 next; + + if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC)) + return -EBADR; + + xid = get_xid(); + again: + in_data.file_offset = cpu_to_le64(start); + in_data.length = cpu_to_le64(len); + + rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + FSCTL_QUERY_ALLOCATED_RANGES, true, + (char *)&in_data, sizeof(in_data), + 1024 * sizeof(struct file_allocated_range_buffer), + (char **)&out_data, &out_data_len); + if (rc == -E2BIG) { + last_blob = 0; + rc = 0; + } else + last_blob = 1; + if (rc) + goto out; + + if (out_data_len < sizeof(struct file_allocated_range_buffer)) { + rc = -EINVAL; + goto out; + } + if (out_data_len % sizeof(struct file_allocated_range_buffer)) { + rc = -EINVAL; + goto out; + } + + num = out_data_len / sizeof(struct file_allocated_range_buffer); + for (i = 0; i < num; i++) { + flags = 0; + if (i == num - 1 && last_blob) + flags |= FIEMAP_EXTENT_LAST; + + rc = fiemap_fill_next_extent(fei, + le64_to_cpu(out_data[i].file_offset), + le64_to_cpu(out_data[i].file_offset), + le64_to_cpu(out_data[i].length), + flags); + if (rc < 0) + goto out; + if (rc == 1) { + rc = 0; + goto out; + } + } + + if (!last_blob) { + next = le64_to_cpu(out_data[num - 1].file_offset) + + le64_to_cpu(out_data[num - 1].length); + len = len - (next - start); + start = next; + goto again; + } + + out: + free_xid(xid); + kfree(out_data); + return rc; +} static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, loff_t off, loff_t len) @@ -4054,6 +4127,7 @@ struct smb_version_operations smb20_operations = { .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, + .fiemap = smb3_fiemap, }; struct smb_version_operations smb21_operations = { @@ -4153,6 +4227,7 @@ struct smb_version_operations smb21_operations = { .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, + .fiemap = smb3_fiemap, }; struct smb_version_operations smb30_operations = { @@ -4261,6 +4336,7 @@ struct smb_version_operations smb30_operations = { .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, + .fiemap = smb3_fiemap, }; struct smb_version_operations smb311_operations = { @@ -4370,6 +4446,7 @@ struct smb_version_operations smb311_operations = { .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, + .fiemap = smb3_fiemap, }; struct smb_version_values smb20_values = { |